CN114152811B - Electric energy meter with three-way array structure and measuring system and measuring method formed by electric energy meter - Google Patents
Electric energy meter with three-way array structure and measuring system and measuring method formed by electric energy meter Download PDFInfo
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- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
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- G—PHYSICS
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Abstract
The invention discloses an electric energy meter with a three-way array structure and a measurement system and a measurement method formed by the electric energy meter. And (3) carrying out new measurement by utilizing the calculated error compensation to obtain electric energy data without errors or with fixed deviation, and continuously and iteratively calculating the measurement errors of the total meter metering module, the user electric energy metering module and the adjacent user electric energy metering modules to obtain the electric energy meter with the verifiable error formed by the three-way array structure. And each three-way array structure meets the relative energy conservation law, the error of the electric energy metering module in each three-way array structure is calculated respectively, the multiple collinearity influence of electric energy data calculation caused by the habit similarity of using electric energy of a user is weakened, and the calculation efficiency and calculation precision are improved.
Description
Technical Field
The invention belongs to the technical field of intelligent meter measurement, and particularly relates to an electric energy meter composed of a three-way array structure, and a measurement system and a measurement method formed by the electric energy meter.
Background
Currently, a large number of flow sensors, such as electricity meters, water meters, gas meters, or other flow meters, are used because they are too large to be removed back to the laboratory for detecting flow errors. There is a need to find techniques and methods for online detection of these flow sensor errors;
For the mathematical algorithm, when the flow measurement system is relatively large, a plurality of flow sensors are included in the flow measurement system, the similarity of the user flow consumption habits can derive the multiple collinearity problem of the flow meter data, and the calculation accuracy of the data calculation method is affected.
Conventionally, flow sensors are installed on the pipeline or at the nodes of the flow measurement system to be measured, and the flow of each point is measured, and the measurement error of each flow sensor is checked separately when needed. The problem with this approach is that the flow sensor error checking is labor intensive and cost prohibitive.
In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a self-checking electric energy meter composed of three-way array structures and a measurement system and a measurement method composed of the self-checking electric energy meter, and aims to not only construct an electric energy measurement system of any scale, but also divide the electric energy measurement system of larger scale into a plurality of three-way array structures of smaller scale through the self-checking electric energy meter composed of the three-way array structures, wherein each three-way array structure meets the law of conservation of relative energy, respectively calculates the error of the self-checking electric energy meter composed of each three-way array structure, weakens the influence of multiple collinearity on electric energy data calculation caused by the similarity of habit of using electric energy of a user, improves the calculation efficiency and the calculation precision, and solves the technical problem of multiple collinearity of electric energy data.
In order to achieve the above object, in a first aspect, the present invention provides an electric energy meter with a three-way array structure, where the electric energy meter with a three-way array structure includes a 1-to-2 electric energy relation structure, the electric energy relation structure forms an electric energy system that accords with an electric energy conservation relation, a total meter module is disposed on 1 main pipeline, the 2 sub pipelines are respectively disposed with the user electric energy meter module and an adjacent user electric energy meter module, the 1 main pipeline and the 2 sub pipelines are in one-to-one correspondence, and the calculation of the metering errors of the total meter module, the user electric energy meter module and the adjacent user electric energy meter module is completed by connecting or designating an error reference standard device on any pipeline, specifically:
establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating electric energy measurement errors of a total meter metering module, a user electric energy metering module and an adjacent user electric energy metering module of the electric energy meter of the three-way array structure by utilizing electric energy data detected by an electric energy meter of the three-way array structure and an error reference standard device, and obtaining electric energy data without errors or with fixed deviation by utilizing new measurement compensation of the calculated errors, and continuously and iteratively calculating the measurement errors of the total meter metering module, the user electric energy metering module and the adjacent user electric energy metering module to obtain the electric energy meter with verifiable errors formed by the three-way array structure; the method is based on the fact that the measurement error of the electric energy sensing unit is continuously calculated in an iterative manner until the difference between the calculated error values is smaller than a preset value (the preset value is obtained according to experience and test experiments and is not described in detail herein), and then the error-free or equal error value of each electric energy sensor in the single-phase three-way array structure electric energy sensor can be determined.
The electric energy meter with the three-way array structure is used for constructing an electric energy system with measurable electric energy errors, and the array layout of the electric energy system with the measurable electric energy errors is completed in a manner of cascading the electric energy meter with the three-way array structure;
the system comprises a plurality of 1-minute 2 inlets, wherein the 1-minute 2 inlets are opposite to the electric energy metering modules respectively arranged on the 2 branch pipelines, and 1 total surface metering module which is used for metering the total electric energy corresponding to the 2 branch pipelines is arranged on the corresponding 2 branch pipelines in the 1 inlets.
Preferably, the electric energy meter is an alternating current electric energy meter or a direct current electric energy meter.
Preferably, the electric energy meter body or the watchcase is provided with or reserved with the wiring terminal for the line access of the electric energy meter of the adjacent user, so that the line access of the electric energy meter of the adjacent user is facilitated.
Preferably, the wiring terminal of the three-way array structure is internally connected with 1 user metering module of the user electric energy meter, the electric energy metering modules on adjacent user electric energy meter lines connected with the wiring terminal are in serial connection, the electric energy on the same line is measured, and the electric energy data of the adjacent user metering modules in the user electric energy meter and the electric energy metering modules on the adjacent user electric energy meter on the same line and errors thereof are read, calculated and analyzed, so that the magnitude transmission of the electric energy data is realized.
The second aspect of the present invention also provides an electric energy measurement system constituted by an electric energy meter of a three-way array structure, comprising: the electric energy meter of the three-way array structure of at least two stages of 1:2, wherein the electric energy meter of the three-way array structure of 1:2 of each stage comprises 1 total surface metering module positioned on a pipeline, and the electric energy metering modules of the users and the electric energy metering modules of the adjacent users on 2 branch pipelines, wherein the total surface metering module is used for measuring the total electric energy of the first adjacent users and the second adjacent users; the system comprises a total meter module positioned on a pipeline, and a user power meter module positioned on the pipeline, wherein the user power meter module positioned on the pipeline and the adjacent user power meter module form a relative power conservation relation;
the electric energy meter comprises a three-way array structure, an electric energy meter, a pipeline, a user electric energy metering module, a power meter data acquisition module, a power meter control module and a power meter control module, wherein the electric energy meter is of a three-way array structure of two adjacent stages, namely 1 and 2, the electric energy meter is of a three-way array structure of the upper stage, namely 1 and 2, the user electric energy metering module is arranged on the pipeline, and therefore all adjacent users in an existing electric energy measuring system to be detected can complete electric energy data series connection through the electric energy meter of the multi-stage three-way array structure.
Preferably, each adjacent user in the existing electric energy measurement system to be detected is connected in series through the electric energy meter of the multi-stage three-way array structure, and electric energy data comparison calculation and magnitude transmission are completed, specifically:
adjacent user electric energy metering modules related to total meter metering modules on pipelines in the electric energy meter with the three-way array structure of 1 st stage and 2 nd stage are connected in series with the user electric energy metering modules on pipelines in the electric energy meter with the three-way array structure of 1 st stage and 2 nd stage;
adjacent user electric energy metering modules related to total meter metering modules on pipelines in the electric energy meter with the three-way array structure of the next stage 1 part 2 are connected in series;
by analogy, the setting of detecting the same user line is realized through the existence of the electric energy metering modules in the electric energy meter with the adjacent two-stage 1-2 three-way array structure, so that the comparison calculation and the magnitude transmission of electric energy data are realized; therefore, after the metering errors of the electric energy metering modules in the electric energy meter of the three-way array structure of 1:2 at any stage are calculated, the data after corresponding metering compensation are used as the known data of the metering errors of the electric energy metering modules in the electric energy meter of the three-way array structure of 1:2 at the next stage.
Preferably, the electric energy measurement system comprises n electric energy meters with three-way array structures, wherein the electric energy meters with the three-way array structures are mutually independent;
the electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-way array structure electric energy meter of the n three-way array structures electric energy meters.
Preferably, the electric energy measurement system further comprises an error reference standard device, wherein the error reference standard device is connected in series on any pipeline branch of the electric energy meter with the three-way array structure;
when the error reference standard device is arranged on a pipeline branch of the three-way array of the last stage 1-2, transmitting a reference error value in a progressive calculation mode from a lower stage to an upper stage so as to calibrate an electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a pipeline branch of the three-way array of 1:2 at the uppermost stage, transmitting a reference error value in a progressive calculation mode from the upper stage to the lower stage so as to calibrate the electric energy measurement system, and obtaining error-free data or equal error data;
When the error reference standard device is arranged on a pipeline branch of the three-way array of the intermediate stage 1 and 2, the reference error value is transmitted in a mode of progressive calculation from the intermediate stage to the upper stage and in a mode of progressive calculation from the intermediate stage to the lower stage, so that the electric energy measurement system is calibrated, and error-free data or equal error data are obtained.
Preferably, the electric energy measurement system comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each electric energy measurement module, and the data transmission module is connected with the microprocessor and used for calculating error edges of the electric energy meter with the three-way array structure and/or sending electric energy data collected from each electric energy measurement module to the cloud server.
In a third aspect, the present invention also provides a measurement method of an electric energy measurement system formed by electric energy meters of a three-way array structure, the electric energy measurement system formed by electric energy meters of a three-way array structure comprising: the electric energy meter is of a three-way array structure with at least two stages of 1-2, wherein the three-way array with 1-2 of each stage comprises 1 total surface metering module positioned on a pipeline, 2 own user electric energy metering modules positioned on the pipeline and adjacent user electric energy metering modules, and the relative electric energy conservation relation is formed by the 1 total surface metering modules positioned on the pipeline, the 2 own user electric energy metering modules positioned on the pipeline and the adjacent user electric energy metering modules;
The electric energy meter comprises a three-way array structure, a pipeline, a user electric energy metering module, a power meter and a power meter, wherein the three-way array structure comprises two adjacent stages of 1-2 electric energy meters, the power meter of the three-way array structure comprises a three-way array structure of 1-2 electric energy meters of the upper stage and the power meter of the three-way array structure of 2 electric energy meters of the lower stage is positioned on the pipeline, and the user electric energy metering modules of the three-way array structure of 2 electric energy meters of the lower stage are connected in series, so that all adjacent users in the existing electric energy measuring system to be detected are connected in series through the three-way array structure of the electric energy meters of the multiple stages, and electric energy data comparison calculation and magnitude transmission are realized;
the error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting original measurement data of the electric energy metering modules on all pipeline branches of the electric energy meters of all three-way array structures in the electric energy measuring system and original measurement data of the error reference standard device;
calculating to obtain reference measurement error values of a total meter module, a user electric energy meter module and an adjacent user electric energy meter module in the three-way array of 1:2 where the error reference standard device is located by utilizing a mathematical model established by relative electric energy conservation relation;
Acquiring an electric energy meter of a three-way array structure with a 1-to-2 relation of the upper stage or the lower stage with the electric energy meter of the three-way array structure with the calculated reference measurement error value, and calculating the reference measurement error values of a total meter metering module, a user electric energy metering module and an adjacent user electric energy metering module in the three-way array with the corresponding upper stage or the lower stage of 1-to-2 by utilizing the relative electric energy conservation relation;
and calculating the reference measurement error value process of the electric energy meters of the 1-minute and 2-way array structure through one or more previous or next stages, so as to obtain the reference measurement error values of the electric energy meters of all the three-way array structures in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error values of the electric energy meters of each three-way array structure to obtain the equal-error data or error-free data.
Preferably, the compensating the original measurement data according to the reference measurement error values of each total meter measurement module, the user power measurement module and the adjacent user power measurement module to obtain the equal error data or the error-free data includes:
compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each electric energy metering module relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of the corresponding total meter modules, the user electric energy meter module and the adjacent user electric energy meter module by utilizing the delta X deviation to obtain error-free data; or,
And directly calculating error-free data of the electric energy meter corresponding to each three-way array structure according to the real error value of the error reference standard device.
Preferably, the Δx deviation between the true error value and the reference error value of the error reference standard device is obtained, specifically:
taking down the electric energy metering module selected as an error reference standard device, and measuring the real error value of the taken-down electric energy metering module; and subtracting the reference error value of the selected electric energy metering module from the actual error value of the removed electric energy metering module to obtain DeltaX deviation.
Preferably, the error reference standard means and the assigned reference error value are determined, in particular:
a first electric energy metering module unit with a known true error value is connected in series on any pipeline branch of an electric energy meter with any three-way array structure of the electric energy metering system;
in the operation process of the electric energy measurement system, respectively reading electric energy data of the first electric energy measurement module unit and electric energy data of the electric energy measurement module on the selected pipeline branch, and calculating a real error value of the electric energy measurement module on the selected pipeline branch;
the power metering modules on the selected pipeline branches serve as error reference standard devices, and the calculated actual error values of the power metering modules on the selected pipeline branches are used for calculating the actual error of each connected power metering module in the power metering system.
Preferably, the error reference standard device comprises:
in the electric energy measurement system, after any electric energy measurement module is selected as an error reference standard device, a preset reference error value is matched with a measurement error of the error reference standard device, wherein the difference value between the preset reference error value and a real error value of the error reference standard device is equal to DeltaX deviation.
Preferably, the method for measuring the electric energy system formed by the tee joint array further comprises the following steps:
after the original measurement data of the electric energy metering module are collected, determining the similarity condition of each original measurement data;
if the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of each electric energy metering module in a cascading manner so as to verify the original measurement data;
if the similarity of each group of original measurement data is smaller than a preset similarity threshold value, the electric energy meter of the three-way array structure positioned at the last stage of 1-2 minutes and the electric energy meter of the three-way array structure positioned at the uppermost stage of 1-2 minutes are subjected to relative electric energy conservation relationship to obtain measurement errors of corresponding electric energy metering modules so as to verify the original measurement data.
Preferably, after completing the layout of the three-way array in the electric energy measurement system and completing the calculation of the electric energy measurement errors of the electric energy measurement modules respectively arranged on the 1-inlet and 2-outlet lines, the continuous iterative calculation of the errors of the electric energy measurement devices in the electric energy system on the corresponding pipeline is completed by using the measurement data with the corrected errors in the three-way array.
In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: the invention provides an electric energy meter with a three-way array structure and a measuring system and a measuring method thereof, wherein the electric energy meter with the three-way array structure comprises at least two stages of electric energy meters with the three-way array structure, the electric energy meter with the three-way array structure not only can construct an electric energy measuring system with any scale, but also can divide the electric energy measuring system with a larger scale into a plurality of three-way array structures with smaller scales through the electric energy meter with the three-way array structure, each three-way array structure meets the relative energy conservation law, the error of an electric energy measuring module in each three-way array structure is calculated respectively, the influence of multiple collinearity on electric energy data calculation caused by the habit similarity of using electric energy of a user is weakened, and the calculating efficiency and the calculating precision are improved.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments of the present invention will be briefly described below. It is evident that the drawings described below are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic structural diagram of a self-checking electric energy meter composed of a three-way array structure provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of an electric energy meter with a three-way array structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a measurement system formed by a self-checking electric energy meter with a three-way array structure according to an embodiment of the present invention;
fig. 4 is a schematic circuit structure diagram based on a sharing standard according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a method for measuring an electrical energy system formed by a three-way array according to an embodiment of the present invention;
FIG. 6 is a flow chart of a first implementation of step 10 of FIG. 5 provided by an embodiment of the present invention;
FIG. 7 is a flow chart of a second implementation of step 10 of FIG. 5 provided by an embodiment of the present invention;
FIG. 8 is a flow chart of a third implementation of step 10 of FIG. 5 provided by an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an error measurement device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The error reference standard device refers to a standard device used as an error reference standard, so that the error reference standard device is determined in the description, and in a certain sense, electric energy data reported by the error reference standard device is used as an error reference standard for breaking homogeneous equations in the calculation process. Whether using physical experimentation or mathematical calculations, the measurement of any one quantity is relative to a reference datum; any one measurement error is detected relative to an error reference standard, and the etalon or data for the error reference standard is referred to as the error reference standard. For example, a "standard meter" in the experiment of error checking of the conventional electric energy meter is an error reference standard. When calculating errors by using the power data, the data errors of the power metering module used as the reference datum are the error reference standard calculated at this time.
The constant error data according to the present invention is: for any sensor with errors, after the error calibration processing is performed on the original measurement data of the sensor (the original measurement data has errors) by using the detected error value after the measurement error of any sensor with errors is detected, all the errors of the obtained calibrated electric energy data still exist are equal to the errors brought by the error detection method. These calibrated power data are referred to as "equierror" data. The "isoerror" is equal to the error value of the error reference standard itself (also described as Δx deviation in various embodiments of the invention). Under the concept of the same error, after error calibration processing, the measurement error of each piece of electric energy data of the sensing system is the same. The concept of error is an effective theory which is proposed by the inventor after years of research aiming at the field of sensing systems.
The error-free data according to the invention are: for any isoerror data, when its "isoerror" is measured and calibrated, the resulting data is error-free data. In view of the fact that it is theoretically impossible to have absolute error-free data, it is possible in other words that the error-free data is data with no errors or negligible errors.
In the embodiment of the present invention, 1-2 is a relative concept, as shown in fig. 2, where an added total table is compared with a charging electric energy meter and a serial adjacent user metering module to form a 1-2 relationship, and in the case of the added total table, instead of a 1-inlet 2-outlet relationship, two presented lines respectively pass through the charging electric energy meter and the serial adjacent user metering module, and pass through the added total table in parallel, so as to complete the 1-2 electric energy relationship structure described above.
Example 1:
as shown in fig. 3, the electric energy meter with the three-way array structure includes an electric energy relation structure of 1-2, and it should be noted that in the following embodiment of the present invention, the three-way array structure in the embodiment of the present invention will be described more by using a 1-in-2-out expression mode, where the 1-in-2-out mode is more representative of the electric energy trend from the perspective of the metering module, and the relation between the total meter module 1 and the electric energy meter of the user 1 and the electric energy meter of the adjacent user 2 can be considered as that the corresponding total meter module 1 is in a total electric energy entry, and the electric energy meter of the user 1 and the electric energy meter of the adjacent user 2 are presented.
The electric energy relation structure forms an electric energy system which accords with the electric energy conservation relation, wherein 1 main pipeline is provided with a total surface metering module, 2 branch pipelines are respectively provided with the user electric energy metering module and the adjacent user electric energy metering module, wherein 1 main pipeline inlet corresponds to 2 branch pipelines one by one, and the calculation of the metering errors of the total surface metering module, the user electric energy metering module and the adjacent user electric energy metering module is completed in a mode of connecting error reference standard devices in series on any pipeline, and the method is specific:
establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating electric energy measurement errors of a total meter module, a user electric energy meter module and an adjacent user electric energy meter module which are respectively arranged on 1 main pipeline inlets and 2 branch pipelines of the electric energy meter of the three-way array structure by utilizing electric energy data detected by the electric energy meter of the three-way array structure and an error reference standard device, and compensating the newly measured electric energy data by utilizing the calculated errors, so as to continuously and iteratively calculate the measurement errors of the total meter module, the user electric energy meter module and the adjacent user electric energy meter module to obtain the electric energy meter with verifiable errors formed by the three-way array structure;
The electric energy meter with the three-way array structure is used for constructing an electric energy system with measurable electric energy errors, and the array layout of the electric energy system with the measurable electric energy errors is completed in a manner of cascading the electric energy meter with the three-way array structure;
the 1 inlets are relative to the electric energy meters respectively arranged on the 2 branch pipelines, and 1 total meter module is arranged on the 1 inlets corresponding to the 2 branch pipelines; for metering the total amount of electrical energy corresponding to the 2 sub-lines.
The embodiment of the invention provides an electric energy meter with a three-way array structure, wherein the electric energy meter with the three-way array structure not only can construct an electric energy measuring system with any scale, but also can divide the electric energy measuring system with a larger scale into a plurality of three-way array structures with smaller scales through the electric energy meter with the three-way array structure, each three-way array structure meets the relative energy conservation law, the error of an electric energy metering module in each three-way array structure is calculated respectively, the influence of multiple collinearity on electric energy data calculation caused by the similarity of the habit of using electric energy of a user is weakened, and the calculation efficiency and calculation precision are improved.
Example 2:
the invention also provides an electric energy measurement system composed of the electric energy meter with the three-way array structure, which is arranged in the electric energy measurement system to be detected, comprising: the electric energy meter of the three-way array structure of at least two stages of 1:2, wherein the electric energy meter of the three-way array structure of 1:2 of each stage comprises 1 total surface metering module positioned on a pipeline, and 2 user electric energy metering modules and adjacent user electric energy metering modules positioned on the pipeline, wherein the total surface metering modules are used for measuring the total electric energy of the first adjacent user and the second adjacent user; the system comprises a total meter module positioned on a pipeline, and a user power meter module positioned on the pipeline, wherein the user power meter module positioned on the pipeline and the adjacent user power meter module form a relative power conservation relation;
The electric energy meter comprises a three-way array structure, an electric energy meter, a pipeline, a user electric energy metering module, a power meter data acquisition module, a power meter control module and a power meter control module, wherein the electric energy meter is of a three-way array structure of two adjacent stages, namely 1 and 2, the electric energy meter is of a three-way array structure of the upper stage, namely 1 and 2, the user electric energy metering module is arranged on the pipeline, and therefore all adjacent users in an existing electric energy measuring system to be detected can complete electric energy data series connection through the electric energy meter of the multi-stage three-way array structure.
The embodiment of the invention provides a measuring system formed by electric energy meters with three-way array structures, wherein the electric energy meters with three-way array structures not only can construct electric energy measuring systems with any scale, but also can divide the electric energy measuring systems with larger scale into a plurality of three-way array structures with smaller scale through the electric energy meters with three-way array structures, each three-way array structure meets the law of conservation of relative energy, the error of an electric energy metering module in each three-way array structure is calculated respectively, the influence of multiple collinearity on electric energy data calculation caused by the similarity of habit of using electric energy of a user is weakened, and the calculation efficiency and calculation precision are improved.
In combination with the embodiment of the invention, there is a preferred implementation scheme, wherein the serial connection of electric energy data is completed by each adjacent user in the existing electric energy measurement system to be detected through the electric energy meter with a multi-stage three-way array structure, specifically:
Adjacent user electric energy metering modules related to total surface metering modules on pipelines in the electric energy meter with the three-way array structure of 1 st stage and 2 nd stage are taken as the user electric energy metering modules on pipelines in the electric energy meter with the three-way array structure of 1 st stage and 2 nd stage;
adjacent user electric energy metering modules related to total meter metering modules on pipelines in the electric energy meter with the three-way array structure of the next stage 1-2 are used as user electric energy metering modules on pipelines in the electric energy meter with the three-way array structure of the next stage 1-2;
by analogy, the setting of detecting the same user line is realized through the existence of the electric energy metering modules in the electric energy meter with the adjacent two-stage 1-2 three-way array structure, so that electric energy data concatenation is realized; therefore, after the metering errors of the electric energy metering modules in the electric energy meter of the three-way array structure of 1:2 at any stage are calculated, the data after corresponding metering compensation are used as the known data of the metering errors of the electric energy metering modules in the electric energy meter of the three-way array structure of 1:2 at the next stage.
In combination with the embodiment of the invention, a preferred implementation scheme exists, and the electric energy measurement system comprises n electric energy meters with three-way array structures, wherein the electric energy meters with the three-way array structures are mutually independent;
The electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-way array structure electric energy meter of the n three-way array structures electric energy meters.
In combination with the embodiment of the invention, a preferred implementation scheme exists, and the electric energy measurement system further comprises an error reference standard device which is connected in series on any pipeline branch of the electric energy meter with the three-way array structure;
when the error reference standard device is arranged on a pipeline branch of the three-way array of the last stage 1-2, transmitting a reference error value in a progressive calculation mode from a lower stage to an upper stage so as to calibrate an electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a pipeline branch of the three-way array of 1:2 at the uppermost stage, transmitting a reference error value in a progressive calculation mode from the upper stage to the lower stage so as to calibrate the electric energy measurement system, and obtaining error-free data or equal error data;
when the error reference standard device is arranged on a pipeline branch of the three-way array of the intermediate stage 1 and 2, the reference error value is transmitted in a mode of progressive calculation from the intermediate stage to the upper stage and in a mode of progressive calculation from the intermediate stage to the lower stage, so that the electric energy measurement system is calibrated, and error-free data or equal error data are obtained.
In combination with the embodiment of the invention, a preferred implementation scheme exists, the electric energy measurement system comprises a microprocessor and a data transmission module, the microprocessor is connected with each electric energy measurement module, and the data transmission module is connected with the microprocessor and is used for calculating error edges of the electric energy meter with the three-way array structure and/or sending electric energy data acquired from each electric energy measurement module to the cloud server.
Example 3:
the embodiment of the invention also provides a measuring method of the electric energy measuring system formed by the electric energy meters with the three-way array structure, the electric energy measuring system formed by the electric energy meters with the three-way array structure comprises the following steps: the electric energy meter is of a three-way array structure with at least two stages of 1-2, wherein the three-way array with 1-2 of each stage comprises 1 total surface metering module positioned on a pipeline, 2 own user electric energy metering modules positioned on the pipeline and adjacent user electric energy metering modules, and the relative electric energy conservation relation is formed by the 1 total surface metering modules positioned on the pipeline, the 2 own user electric energy metering modules positioned on the pipeline and the adjacent user electric energy metering modules;
the system comprises a three-way array structure, a pipeline, a power meter data acquisition module, a power meter control module and a power meter control module, wherein the power meter is used for measuring power of adjacent users on the pipeline aiming at the power meter of the three-way array structure of the adjacent two stages, namely 1 part and 2 parts, of the three-way array structure of the upper stage, namely 1 part and 2 parts, of the power meter, and the power meter is used for connecting all adjacent users in the existing power meter system to be detected in series through the power meter of the multi-stage three-way array structure;
The error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting original measurement data of the electric energy metering modules on all pipeline branches of the electric energy meters of all three-way array structures in the electric energy measuring system and original measurement data of the error reference standard device;
calculating to obtain reference measurement error values of a total meter module, a user electric energy meter module and an adjacent user electric energy meter module in the three-way array of 1:2 where the error reference standard device is located by utilizing a mathematical model established by relative electric energy conservation relation;
acquiring an electric energy meter of a three-way array structure with a 1-to-2 relation of the upper stage or the lower stage with the electric energy meter of the three-way array structure with the calculated reference measurement error value, and calculating the reference measurement error values of a total meter metering module, a user electric energy metering module and an adjacent user electric energy metering module in the three-way array with the corresponding upper stage or the lower stage of 1-to-2 by utilizing the relative electric energy conservation relation;
and calculating the reference measurement error value process of the electric energy meters of the 1-minute and 2-way array structure through one or more previous or next stages, so as to obtain the reference measurement error values of the electric energy meters of all the three-way array structures in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error values of the electric energy meters of each three-way array structure to obtain the equal-error data or error-free data.
The embodiment of the invention provides a measuring method for an electric energy meter with a three-way array structure, wherein the electric energy meter with the three-way array structure not only can construct an electric energy measuring system with any scale, but also can divide the electric energy measuring system with a larger scale into a plurality of three-way array structures with smaller scales through the electric energy meter with the three-way array structure, each three-way array structure meets the relative energy conservation law, the error of an electric energy measuring module in each three-way array structure is calculated respectively, the influence of multiple collinearity on electric energy data calculation caused by the similarity of the habit of using electric energy of a user is weakened, and the calculation efficiency and the calculation precision are improved.
An optional extension scheme exists in combination with the embodiment of the present invention, the compensating the original measurement data according to the reference measurement error value of each total meter measurement module, the current user power measurement module and the power measurement modules of the adjacent users connected in series, to obtain the equal error data or the error-free data includes:
compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each electric energy metering module relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of the corresponding total meter modules, the user electric energy meter module and the adjacent user electric energy meter module by utilizing the delta X deviation to obtain error-free data; or,
And directly calculating error-free data of the electric energy meter corresponding to each three-way array structure according to the real error value of the error reference standard device.
An optional extension scheme exists in combination with the embodiment of the invention, and the delta X deviation between the true error value and the reference error value of the error reference standard device is obtained, specifically:
taking down the electric energy metering module selected as an error reference standard device, and measuring the real error value of the taken-down electric energy metering module; and subtracting the reference error value of the selected electric energy metering module from the actual error value of the removed electric energy metering module to obtain DeltaX deviation.
An optional extension scheme exists in combination with the embodiment of the invention, and the error reference standard device and the assigned reference error value are determined specifically as follows:
a first electric energy metering module unit with a known true error value is connected in series on any pipeline branch of an electric energy meter with any three-way array structure of the electric energy metering system;
in the operation process of the electric energy measurement system, respectively reading electric energy data of the first electric energy measurement module unit and electric energy data of the electric energy measurement module on the selected pipeline branch, and calculating a real error value of the electric energy measurement module on the selected pipeline branch;
The power metering modules on the selected pipeline branches serve as error reference standard devices, and the calculated actual error values of the power metering modules on the selected pipeline branches are used for calculating the actual error of each connected power metering module in the power metering system.
There is an optional extension of the embodiment of the present invention, where the reference error value of the error reference standard device includes:
in the electric energy measurement system, after any electric energy measurement module is selected as an error reference standard device, a preset reference error value is matched with a measurement error of the error reference standard device, wherein the difference value between the preset reference error value and a real error value of the error reference standard device is equal to DeltaX deviation.
An optional extension scheme exists in combination with the embodiment of the present invention, and the measurement method of the electric energy system formed by the three-way array further includes:
after the original measurement data of the electric energy metering module are collected, determining the similarity condition of each original measurement data;
if the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of each electric energy metering module in a cascading manner so as to verify the original measurement data;
If the similarity of each group of original measurement data is smaller than a preset similarity threshold value, the electric energy meter of the three-way array structure positioned at the last stage of 1-2 minutes and the electric energy meter of the three-way array structure positioned at the uppermost stage of 1-2 minutes are subjected to relative electric energy conservation relationship to obtain measurement errors of corresponding electric energy metering modules so as to verify the original measurement data.
In combination with the embodiment of the invention, an optional extension scheme exists, after completing the layout of the three-way array in the electric energy system and completing the calculation of the electric energy measurement errors of the electric energy measurement modules respectively arranged on the 1-inlet and 2-outlet lines, the continuous iterative calculation of the errors of the electric energy measurement devices in the electric energy system on the corresponding pipelines is completed by using the measurement data with the corrected errors in the three-way array.
Example 4:
at present, when the electric energy measurement system is large in scale, due to the similarity of electric energy consumption habits of users, the problem of multiple collinearity of electric energy meter data can be derived, so that the calculation efficiency is reduced, and the calculation accuracy of a data calculation method is affected. In order to solve the foregoing problems, the present embodiment provides an electric energy measurement system for facilitating error checking, in practical use, the electric energy measurement system with a pipeline of an electric energy measurement module is configured as a structure of a plurality of subsystems for facilitating error calculation, the electric energy measurement system includes at least two electric energy meters of a three-way array structure of 1:2, wherein the electric energy meter of the three-way array structure of 1:2 not only can construct an electric energy measurement system of any scale, but also can divide the electric energy measurement system of a larger scale into three-way array structures of a plurality of smaller scales through the electric energy meter of the three-way array structure of 1:2, each three-way array structure satisfies the law of relative conservation of energy, and calculates the error of the electric energy measurement module in each three-way array structure, so as to effectively reduce the multiple collinearity problem of electric energy data.
The electric energy metering modules in each three-way array structure conform to the correct network topological relation. The network topology relationship refers to connection and attribution relationship between an incoming line side electric energy metering module and an outgoing line side electric energy metering module, wherein the concepts of the incoming line side electric energy metering module and the outgoing line side electric energy metering module are relatively speaking, and the relationship is a relationship between an electric energy total table and an electric energy sub-meter.
Referring to fig. 3, a schematic structural diagram of the electric energy measurement system of the present embodiment is described, the electric energy measurement system including: the electric energy meter with the three-way array structure of at least two stages of 1:2, wherein the electric energy meter with the three-way array structure of 1:2 of each stage comprises 1 total surface metering module positioned on a pipeline, 2 user electric energy metering modules positioned on the pipeline and adjacent user electric energy metering modules, and the relative electric energy conservation relation is formed by the 1 total surface metering modules positioned on the pipeline, the 2 user electric energy metering modules positioned on the pipeline and the adjacent user electric energy metering modules.
The electric energy meter comprises a three-way array structure, an electric energy meter, a pipeline, a user electric energy metering module, a power meter data acquisition module, a power meter control module and a power meter control module, wherein the electric energy meter is of a three-way array structure of two adjacent stages, namely 1 and 2, the electric energy meter is of a three-way array structure of the upper stage, namely 1 and 2, the user electric energy metering module is arranged on the pipeline, and therefore all adjacent users in an existing electric energy measuring system to be detected can complete electric energy data series connection through the electric energy meter of the multi-stage three-way array structure.
In this embodiment, the upper stage and the lower stage are relative concepts, in which, the uppermost stage of the electric energy metering module and the last stage of the electric energy metering module are removed, and the electric energy metering module located in the middle is an electric energy meter with a three-way array structure of 1 st stage and 2 nd stage, which can be subordinate to the electric energy meter with a three-way array structure of 1 st stage and 2 nd stage, or subordinate to the electric energy meter with a three-way array structure of 1 st stage and 2 nd stage, when a certain electric energy metering module subordinate to the electric energy meter with a three-way array structure of 1 st stage and 2 nd stage, for example, the electric energy metering module is an adjacent user electric energy metering module; meanwhile, when the electric energy metering module belongs to the electric energy meter with the 1-2 tee array structure, the electric energy metering module is the user electric energy metering module of the electric energy meter with the 1-2 tee array structure.
The error calculation and compensation of the electric energy meter with the 1-minute 2-way array structure are explained.
For an electrical energy measurement system with 1 inlet line and 2 outlet lines, the electrical energy meets the relative energy conservation relationship, namely, the following formula is satisfied:
wherein w in the foregoing formula 0 ，x 0 And w i ，x i Representing the original measurement data and errors of 1 total meter module corresponding to the user power meter module (i is 1) and the adjacent user power meter module (i is 2). For example: w (w) 0 、w 1 And w 2 The electric energy metering data of the total meter module 1 shown in fig. 3, the metering data of the electric energy meter of the user 1 of the user and the metering data of the electric energy meter of the adjacent user 2 can be respectively corresponding; the electric energy metering data of the total meter module 2 shown in fig. 3, the metering data of the electric energy meter of the adjacent user 2 and the metering data of the electric energy meter of the adjacent user 3 can be respectively corresponding, and the like.
In the foregoing formula, x 0 And x i Any one of the data is a known quantity, and the error value of other electric energy metering modules can be obtained through calculation by reading the data for at least 2 times.
The readings of the total meter module, the user meter module and the adjacent user meter module of the electric energy meter of the three-way array structure are compensated by using the calculated error value, so that electric energy data without errors or equal errors can be obtained:
w′ 0 ＝w 0 (1+x 0 )
w′ i ＝w i (1+x i )
wherein w' 0 And w' i And the data after compensation also satisfies the relative energy conservation relation:
in the foregoing calculation process, an error reference standard needs to be set, and error-free data or error-free data can be obtained by using the error reference standard, so as to perform error correction on the electric energy measurement system.
The selection or setting of the error reference criteria includes at least the following: a cascading calculation transfer method; a method of sharing criteria; a standard method is connected in series; post-correction methods.
The cascade calculation transfer method refers to the following steps: and selecting an electric energy metering module on a pipeline branch of the electric energy meter with a three-way array structure of 1-2 stages as an error reference standard device, and endowing the error reference standard device with a reference error value.
Specifically, when the error reference standard device is arranged on a pipeline branch where a first adjacent user and a second adjacent user of the electric energy meter with the three-way array structure of 1-2 of the last stage are located, transmitting a reference error value in a progressive calculation mode from a lower stage to an upper stage so as to calibrate an electric energy measurement system and obtain error-free data or equal error data; when the error reference standard device is arranged on a pipeline branch of the electric energy meter of the three-way array structure of 1:2 at the uppermost stage, the reference error value is transmitted in a progressive calculation mode from the upper stage to the lower stage so as to calibrate the electric energy measurement system, and error-free data or equal error data are obtained. In a preferred embodiment, the error reference standard device may be disposed at an intermediate stage, so that the calibration may be performed from the intermediate stage to two ends, so as to improve the calculation efficiency, specifically, when the error reference standard device is disposed on a pipeline branch of the electric energy meter with a three-way array structure of 1-2 stages, the reference error value is transmitted in a manner of progressive calculation from the intermediate stage to the upper stage and in a manner of progressive calculation from the intermediate stage to the lower stage, so as to calibrate the electric energy measurement system, and obtain error-free data or error data.
When the delta X deviation exists between the true error value and the reference error value of the error reference standard device, the delta X deviation is utilized to compensate the equal error data of the corresponding electric energy metering modules, and error-free data are obtained. When the reference error value of the error reference standard device is the same as the true error value of the error reference standard device, the error-free data corresponding to each electric energy metering module is obtained directly according to the true error value of the error reference standard device.
The method for sharing the standard refers to the following steps: the electric energy meter error calculation corresponding to the three-way array structure of 1 minute and 2 can be completed by connecting an electric energy metering module with known or unknown error into any pipeline branch of the electric energy meter with the three-way array structure of 1 minute and 2 as an error reference standard device. Then, the same known or unknown error electric energy metering module is connected into any pipeline branch of the adjacent 1-2 three-way array structure electric energy meter in series through pipeline switching, and is used as an error reference standard device, so that the error calculation of the adjacent 1-2 three-way array structure electric energy meter can be completed. The error magnitude can be transferred between 2 independent electric energy meters with a 1-minute and 2-way array structure by a standard sharing method.
Specifically, the electric energy measurement system includes a first 1-2 three-way electric energy meter and a second 1-2 three-way electric energy meter (similar to the electric energy meter of fig. 4, which is also simply described as a first three-way electric energy meter and a second three-way electric energy meter), where the first 1-2 three-way electric energy meter and the second 1-2 three-way electric energy meter are independent of each other;
the electric energy measurement system further comprises an error reference standard device, wherein the error reference standard device is arranged on a pipeline branch of the electric energy meter of the first 1-minute 2 three-way array structure, the error reference standard device is also arranged on a pipeline branch of the electric energy meter of the second 1-minute 2 three-way array structure, and a switch is arranged on the selected pipeline branch; the state of the switch is set to switch the pipeline branch into which the error reference standard device is connected in series, so that the error reference standard device is selectively connected in series to the electric energy meter of the first 1-2 three-way array structure or the electric energy meter of the second 1-2 three-way array structure.
For example, referring to fig. 4, the corresponding circuit structure design can be used for switching the pipeline by controlling the on-off of the corresponding switch. As shown in fig. 4, taking an electric energy meter with a three-way array structure of 1 minute 2 as an example for explanation, the electric energy meter with the three-way array structure of 1 minute 2 and the electric energy meter with the three-way array structure of second 1 minute 2 are mutually independent, the error reference standard device is simultaneously connected in series on one pipeline branch of the electric energy meter with the three-way array structure of first 1 minute 2 and the electric energy meter with the three-way array structure of second 1 minute 2, meanwhile, a switch K1 is arranged on the pipeline branch of the electric energy meter with the three-way array structure of first 1 minute 2, the switch K1 is connected in parallel with the error reference standard device, the switch K1 and the error reference standard device are connected in series with the electric energy metering modules on the selected pipeline branch, and a switch K2 is arranged between the error reference standard device and the electric energy metering modules on the selected pipeline branch; meanwhile, a switch K3 is arranged on a pipeline branch of the electric energy meter of the second 1-minute 2 three-way array structure, the switch K3 is connected with the error reference standard device in parallel, the switch K3 and the error reference standard device are connected with the electric energy metering module on the selected pipeline branch in series, and a switch K4 is arranged between the error reference standard device and the electric energy metering module on the selected pipeline branch. The switches K1 to K4 can be specifically switch channels of relays, and the on-off of the corresponding switches K1 to K4 is controlled through the relays.
In actual use, when the switch K1 is set to be in an open state, the switch K2 is set to be in a closed state, the switch K3 is set to be in a closed state, and the switch K4 is set to be in an open state, the error reference standard device is connected in series to a pipeline corresponding to the electric energy meter of the first 1-2 three-way array structure, and is used as an error reference standard to perform error checking on the electric energy metering module in the electric energy meter of the first 1-2 three-way array structure.
In actual use, when the switch K1 is set to be in a closed state, the switch K2 is set to be in an open state, the switch K3 is set to be in an open state, and the switch K4 is set to be in a closed state, the error reference standard device is connected in series to a pipeline corresponding to the electric energy meter of the second 1-2 three-way array structure, and is used as an error reference standard to perform error checking on the electric energy metering module in the electric energy meter of the second 1-2 three-way array structure.
In this embodiment, the error calibration of the two mutually independent 1-2 three-way array electric energy meters can be completed by using one error reference standard device, and the normal operation of the two electric energy meters is not affected. In the electric energy meter with the 1-2 three-way array structure, the method for sharing the standard is similar, and is not repeated here.
The serial standard method refers to the following steps: the electric energy metering module with known error is connected into any pipeline branch in the electric energy meter with the three-way array structure of 1 minute and 2 in series and used as an error reference standard device, and the electric energy meter error calculation with the three-way array structure of 1 minute and 2 can be completed.
The post-correction method refers to: and selecting 1 pipeline branch electric energy metering module in the electric energy meter with the 1-minute and 2-way array structure, giving a reference error value to the pipeline branch electric energy metering module, and calculating the error of all the electric energy metering modules of the electric energy meter with the 1-minute and 2-way array structure. Taking down any pipeline branch electric energy metering module from the electric energy meter with a 1-minute and 2-minute three-way array structure, measuring the real error value by using a standard experiment method, calculating the deviation between the set reference error value and the real error value by using the set reference error value and the real error value, correcting the errors of all the electric energy metering modules by using the deviation, obtaining the real errors of all the electric energy metering modules, correcting the original measured data, and obtaining error-free data.
Further, the electric energy measurement system comprises a microprocessor and a data transmission module, wherein the microprocessor is connected with each electric energy measurement module, and the data transmission module is connected with the microprocessor and used for sending electric energy data acquired by the microprocessor from each electric energy measurement module to the cloud server.
The microprocessor comprises a microprocessor, a preset number of I/O ports, a preset number of electric energy metering modules and a data transmission end, wherein the preset number of I/O ports in the microprocessor are set to be connected with the data transmission end of the preset number of electric energy metering modules. The acquisition end of the electric energy metering module sub-meter positioned at the last stage is coupled with a user line and/or a user pipeline which are responsible for detection, and is used for feeding back the actual use condition of the corresponding user to the microprocessor; the data transmission module is connected with the microprocessor, and transmits detection data acquired from each electric energy metering module to the cloud server when the detection data are needed.
In combination with the above embodiments, the electric energy measurement system provided by the invention includes at least two stages of electric energy meters with a 1-2 three-way array structure, wherein the electric energy meters with the 1-2 three-way array structure not only can construct electric energy measurement systems of any scale, but also can divide the electric energy measurement system with a larger scale into a plurality of three-way array structures with smaller scales through the electric energy meters with the 1-2 three-way array structure, each three-way array structure meets the law of relative conservation of energy, and the error of the electric energy measurement module in each three-way array structure is calculated respectively, so that the influence of multiple collinearity on electric energy data calculation caused by the similarity of habit of using electric energy of a user is weakened, and the calculation efficiency and calculation precision are improved.
Example 5:
in combination with the electric energy measurement system of the above embodiment, the present embodiment provides a measurement method of an electric energy system constituted by a three-way array of the electric energy measurement system, the electric energy measurement system includes: the electric energy meter with the three-way array structure of at least two stages of 1-2, wherein the three-way array of 1-2 of each stage comprises 1 total meter module positioned on a pipeline and 2 user electric energy meter modules positioned on the pipeline and adjacent user electric energy meter modules (the user electric energy meter modules are called as user electric energy meter modules for highlighting the relative layout positions of the electric energy meter with the corresponding three-way array structure, for the electric energy meter, users on the two separated pipelines can be uniformly understood as a first adjacent user and a second adjacent user, and the 1 total meter module positioned on the pipeline and the 2 user electric energy meter modules positioned on the pipeline and the adjacent user electric energy meter modules form a relative electric energy conservation relation;
the system comprises a three-way array structure, a pipeline, a power meter data acquisition module, a power meter control module and a power meter control module, wherein the power meter is used for measuring power of adjacent users on the pipeline aiming at the power meter of the three-way array structure of the adjacent two stages, namely 1 part and 2 parts, of the three-way array structure of the upper stage, namely 1 part and 2 parts, of the power meter, and the power meter is used for connecting all adjacent users in the existing power meter system to be detected in series through the power meter of the multi-stage three-way array structure;
Referring to fig. 5, the method for measuring the electric energy system formed by the three-way array comprises the following steps:
step 10: an error reference standard device is assigned or built into the power measurement system and assigned a reference error value.
In this embodiment, in order to calibrate the original data, an error reference standard device is set first, and then the original measurement data is calibrated based on the error reference standard device, so as to eliminate errors and obtain more accurate electric energy data. There are at least the following ways of setting up the error reference standard means.
Mode one: by adopting a post calibration method, the determining an error reference standard device, specifically, selecting an electric energy metering module as an error reference standard device in the electric energy measurement system, obtaining a Δx deviation between a true error value of the error reference standard device and the reference error value, as shown in fig. 6, specifically includes:
step 1111: the selected power metering module is removed from the power metering system, and the true error value of the selected power metering module is measured.
Referring to fig. 3, the electric energy measurement system includes a plurality of electric energy measurement modules, wherein, for each stage of electric energy meter with a 1-to-2 three-way array structure, each electric energy meter includes 3 electric energy measurement modules, wherein, 1 electric energy measurement module total table is used for measuring incoming line energy, 2 electric energy measurement module sub-tables are used for measuring outgoing line energy, 3 electric energy measurement modules form a correct network topology relationship, and whether the network topology relationship is correct or not can be determined according to a correlation method.
For the electric energy meter with the three-way array structure of 1-2 of each stage, one electric energy metering module can be selected from any one of 3 electric energy metering modules to serve as an error reference standard device.
Step 1112: and subtracting the reference error value of the selected electric energy metering module from the actual error value of the selected electric energy metering module to obtain the DeltaX deviation.
In an alternative embodiment, a numerical value is self-specified as a reference error value according to actual conditions, and a numerical value can also be selected from a standard measurement error interval as the reference error value. The reference error value may be in and out of the true measurement error of the electric energy metering module, and may not truly reflect the measurement error of the electric energy metering module. The difference between the reference error value of the error reference standard device and the true error value of the error reference standard device is equal to the DeltaX deviation.
Mode two: by adopting a serial standard method, the device for determining the error reference standard is specifically that a first electric energy metering module unit with a known true error value is connected in series on a pipeline branch where any electric energy metering module in the electric energy measuring system is located, and then the reference measurement error of each electric energy metering module in the electric energy measuring system is obtained through calculation, as shown in fig. 7, the specific electric energy measuring system comprises:
Step 1121: and in the operation process of the electric energy measurement system, respectively reading the electric energy data of the first electric energy measurement module unit and the electric energy data of the electric energy measurement module on the pipeline branch, and calculating the real error value of the electric energy measurement module on the selected pipeline branch.
Step 1122: and the calculated true error value of the electric energy metering module on the selected pipeline branch is used as an error reference standard device to calculate the true error of each electric energy metering module in the electric energy metering system.
In comparison, the second mode is more suitable for the example scenario of the specific application, but in the implementation process of the second mode, it is also recommended to set an interface for accessing the first electric energy metering module unit in a certain pipeline branch or a plurality of pipeline branches of the existing electric energy metering system.
Mode three: adopting a cascade calculation transmission method, wherein the electric energy measurement system and the adjacent first electric energy measurement system and/or second electric energy measurement system can construct a relative second electric energy conservation environment, and then determining an error reference standard device, specifically, arbitrarily selecting an electric energy measurement module with a known true error value from the first electric energy measurement system and/or the second electric energy measurement system as the error reference standard device; the calculating obtains a reference measurement error of each electric energy metering module in the electric energy metering system, as shown in fig. 8, specifically includes:
Step 1131: and establishing an energy equation according to the second electric energy conservation environment by using the electric energy measurement system and each electric energy measurement module in the adjacent first electric energy measurement system and/or second electric energy measurement system.
Step 1132: and calculating the true error of each electric energy metering module in the electric energy measuring system according to the true error value of the error reference standard device.
In this embodiment, an electric energy metering module having a real error value in the adjacent electric energy metering system may be selected as an error reference standard device according to the adjacent electric energy metering system having the known real error value, where the reference error value determined according to this method is the real error value (also described as a real error), so that the real error value of each electric energy metering module in the electric energy metering system to be measured can be calculated under a condition that the electric energy metering system to be measured is based on the electric energy metering system to be measured and the adjacent first electric energy metering system and/or second electric energy metering system can construct a relative second electric energy conservation environment.
In the third mode, when the error reference standard device is set, the measurement error of each electric energy metering module obtained according to the following step 12 is the true error value of each electric energy metering module, and the corresponding original data is calibrated through the true error value, so that error-free electric energy data can be obtained. In general, the third mode is the most intelligent, but the specific implementation of the third mode also puts higher demands on the architecture relationship, the sharing of data and the computing capacity of each electric energy measurement system in the current environment.
Mode four: by adopting a standard sharing mode, an electric energy metering module with known or unknown error is connected into any pipeline branch in the electric energy meter with the 1-to-2 three-way array structure in series, and the pipeline branch is used as an error reference standard device, so that the electric energy meter error calculation corresponding to the 1-to-2 three-way array structure can be completed. Then, the same reference electric energy metering module with known or unknown error is connected into any pipeline branch of the adjacent 1-2 three-way array structure electric energy meter in series through pipeline switching, and is used as an error reference standard device, so that the error calculation of the adjacent 1-2 three-way array structure electric energy meter can be completed. The error magnitude can be transferred between 2 independent electric energy meters with a 1-minute and 2-way array structure by a standard sharing method.
Specifically, the electric energy measurement system comprises an electric energy meter with a first 1-minute-2 three-way array structure and an electric energy meter with a second 1-minute-2 three-way array structure, wherein the electric energy meter with the first 1-minute-2 three-way array structure and the electric energy meter with the second 1-minute-2 three-way array structure are mutually independent, namely, the electric energy meter with the first 1-minute-2 three-way array structure is subordinate to one electric energy measurement system, and the electric energy meter with the second 1-minute-2 three-way array structure is subordinate to the other electric energy measurement system; the electric energy measurement system further comprises an error reference standard device, wherein the error reference standard device is arranged on a pipeline branch of the electric energy meter of the first 1-minute 2 three-way array structure, the error reference standard device is also arranged on a pipeline branch of the electric energy meter of the second 1-minute 2 three-way array structure, and a switch is arranged on the selected pipeline branch; the state of the switch is set to switch the pipeline branch into which the error reference standard device is connected in series, so that the error reference standard device is selectively connected in series to the electric energy meter of the first 1-2 three-way array structure or the electric energy meter of the second 1-2 three-way array structure.
In this embodiment, the error calibration of the two mutually independent 1-2 three-way array electric energy meters can be completed by using one error reference standard device, and the normal operation of the two electric energy meters is not affected.
In other ways, a standard meter can also be introduced into the power measurement system, which standard meter serves as an error reference standard. The arrangement of the error reference standard device is selected according to the actual situation, and is not particularly limited here.
Step 11: and acquiring the original measurement data of the electric energy metering modules on all input branches and output branches in the electric energy measuring system and the original measurement data of the error reference standard device.
In this embodiment, the raw measurement data of the individual electric energy metering modules may be automatically collected by the concentrator and transferred to the database server. Wherein, because of the error of the electric energy metering module, correspondingly, the original measurement data has the error.
Step 12: and calculating the reference measurement error value of an electric energy metering module in the electric energy meter with the 1-2 three-way array structure in which the error reference standard device is positioned by utilizing the relative energy conservation relation aiming at the electric energy meter with the 1-2 three-way array structure in which the error reference standard device is positioned.
In this embodiment, a cascade progressive calculation manner may be adopted to transfer the reference error value, so that the scale of data calculation may be reduced, the calculation efficiency may be improved, and the co-linearity problem caused by the similarity of the user electric energy data may be reduced.
Step 13: and acquiring a three-way array structure with a 1-to-2 relation of the upper stage or the lower stage of the electric energy metering module with the calculated reference measurement error value, and calculating the reference measurement error value of the electric energy metering module in the electric energy meter with the corresponding 1-to-2 three-way array structure of the upper stage or the lower stage by utilizing the relative energy conservation relation.
Step 14: and calculating the reference measurement error value process of the electric energy metering modules in the electric energy meter with the 1-minute and 2-way array structure by one or more previous or next stages, thereby obtaining the reference measurement error values of all the electric energy metering modules in the electric energy measuring system, and compensating the original measurement data according to the reference measurement error value of each electric energy metering module to obtain equal-error data or error-free data.
In this embodiment, the corresponding raw measurement data is compensated by using the reference measurement error value, so as to obtain the equal error data of the reference error value of each electric energy metering module relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of each corresponding electric energy metering module by using the delta X deviation to obtain error-free data; or,
And directly calculating error-free data corresponding to each electric energy metering module according to the real error value of the error reference standard device.
When the setting modes of the error reference standard device are different, the data calibration modes corresponding to the step 12 are also different.
When the error reference standard device is set in the second mode or the standard meter is directly referenced as the error reference standard device, the measurement error of each electric energy metering module in the electric energy measuring system is obtained based on the error reference standard device, the measurement error is the real error value of each electric energy metering module, and then the corresponding original measurement data is calibrated based on the real error value of each electric energy metering module, so that error-free data are obtained.
When the error reference standard device is selected in the foregoing manner, the measurement error of each electric energy metering module in the electric energy measuring system is obtained based on the error reference standard device, where the measurement error is a reference measurement error of each electric energy metering module, and may not be equal to the true error value. And calibrating the original measurement data according to the reference measurement errors to obtain compensated electric energy data, wherein the compensated electric energy data corresponding to each electric energy metering module is equal error data aiming at the electric energy measurement system, and error-free data can be obtained after the equal errors are required to be eliminated.
Due to the equal error theory, the true error value of each electric energy metering module minus the reference measurement error thereof is correspondingly equal to the DeltaX deviation. Therefore, one electric energy metering module can be selected at will to acquire the true error value of the electric energy metering module so as to acquire the delta X deviation of the electric energy metering system, and the compensated electric energy data of other electric energy metering modules are calibrated to acquire error-free electric energy data.
In this embodiment, after the Δx deviation is obtained, the compensated electric energy data of each electric energy metering module is calibrated according to the Δx deviation, so as to obtain error-free electric energy data of each electric energy metering module, where the error-free electric energy data is data that has no errors in theory or data that has negligible errors.
Example 6:
fig. 9 is a schematic structural diagram of an error calibration device according to an embodiment of the present invention. The error calibration device of the present embodiment includes one or more processors 41 and a memory 42. In fig. 9, a processor 41 is taken as an example.
The processor 41 and the memory 42 may be connected by a bus or otherwise, which is illustrated in fig. 9 as a bus connection.
The memory 42 is used as a non-volatile computer-readable storage medium for storing a non-volatile software program and a non-volatile computer-executable program, and is used for storing the measurement methods in embodiments 2 to 5. The processor 41 performs the measurement method by running non-volatile software programs and instructions stored in the memory 42.
Memory 42 may include high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 42 may optionally include memory located remotely from processor 41, which may be connected to processor 41 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
It should be noted that, because the content of information interaction and execution process between modules and units in the above-mentioned device and system is based on the same concept as the processing method embodiment of the present invention, specific content may be referred to the description in the method embodiment of the present invention, and will not be repeated here.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the embodiments may be implemented by a program that instructs associated hardware, the program may be stored on a computer readable storage medium, the storage medium may include: read Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk, optical disk, or the like.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (15)
1. The utility model provides an electric energy measurement system by tee bend array architecture's electric energy meter constitutes, its characterized in that, tee bend array architecture's electric energy meter includes 1 minute 2 electric energy relation structures, electric energy relation structures has formed an electric energy system who accords with electric energy conservation relation, wherein, be provided with total meter module on 1 house steward line, 2 minute pipelines are provided with this user's electric energy meter module and adjacent user's electric energy meter module respectively, wherein, 1 house steward line and 2 minute pipelines one-to-one, concatenate or appointed error reference standard device's mode on arbitrary pipeline accomplish the calculation of total meter module, this user's electric energy meter module and adjacent user's electric energy meter module metering error, specifically: establishing a mathematical model by utilizing the electric energy conservation relation of an electric energy system, calculating electric energy measurement errors of a total meter metering module, a user electric energy metering module and an adjacent user electric energy metering module of the electric energy meter of the three-way array structure by utilizing electric energy data detected by an electric energy meter of the three-way array structure and an error reference standard device, and obtaining electric energy data without errors or with fixed deviation by utilizing new measurement compensation of the calculated errors, and continuously and iteratively calculating the measurement errors of the total meter metering module, the user electric energy metering module and the adjacent user electric energy metering module to obtain the electric energy meter with verifiable errors formed by the three-way array structure; in an electrical energy measurement system to be detected, comprising: the electric energy meter of the three-way array structure of at least two stages of 1:2, wherein the electric energy meter of the three-way array structure of 1:2 of each stage comprises 1 total surface metering module positioned on a pipeline, and the electric energy metering modules of the users and the electric energy metering modules of the adjacent users on 2 branch pipelines, wherein the total surface metering modules are used for measuring the total electric energy of the first adjacent users and the second adjacent users; the system comprises a total meter module positioned on a pipeline, and a user power meter module positioned on the pipeline, wherein the user power meter module positioned on the pipeline and the adjacent user power meter module form a relative power conservation relation;
The system comprises a three-way array structure, a pipeline, a power meter data acquisition module, a power meter control module and a power meter control module, wherein the power meter is used for measuring power of adjacent users on the pipeline aiming at the power meter of the three-way array structure of the adjacent two stages, namely 1 part and 2 parts, of the three-way array structure of the upper stage, namely 1 part and 2 parts, of the power meter, and the power meter is used for connecting all adjacent users in the existing power meter system to be detected in series through the power meter of the multi-stage three-way array structure;
the error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting original measurement data of the electric energy metering modules on all pipeline branches of the electric energy meters of all three-way array structures in the electric energy measuring system and original measurement data of the error reference standard device;
calculating to obtain reference measurement error values of a total meter module, a user electric energy meter module and an adjacent user electric energy meter module in the three-way array of 1:2 where the error reference standard device is located by utilizing a mathematical model established by relative electric energy conservation relation;
Acquiring an electric energy meter of a three-way array structure with a 1-to-2 relation of the upper stage or the lower stage with the electric energy meter of the three-way array structure with the calculated reference measurement error value, and calculating the reference measurement error values of a total meter metering module, a user electric energy metering module and an adjacent user electric energy metering module in the three-way array with the corresponding upper stage or the lower stage of 1-to-2 by utilizing the relative electric energy conservation relation;
calculating the reference measurement error value process of the electric energy meters of the 1-minute 2 three-way array structure through one or more previous or next stages, so as to obtain the reference measurement error values of the electric energy meters of all three-way array structures in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error value of the electric energy meters of each three-way array structure to obtain equal-error data or error-free data;
the method comprises the steps of connecting an electric energy metering module with known or unknown errors into any pipeline branch of 1 electric energy meter with a 1-to-2 three-way array structure in series, and using the pipeline branch as an error reference standard device to finish electric energy meter error calculation corresponding to the 1-to-2 three-way array structure; the same known or unknown error electric energy metering module is connected into any pipeline branch of the adjacent 1-2 three-way array structure electric energy meter in series through pipeline switching, and is used as an error reference standard device to complete the error calculation of the adjacent 1-2 three-way array structure electric energy meter.
2. The electric energy measurement system composed of three-way array electric energy meters according to claim 1, wherein the electric energy data comparison calculation and magnitude transmission are performed by the electric energy meters of the multi-stage three-way array structure for each adjacent user in the existing electric energy measurement system to be detected, specifically:
adjacent user electric energy metering modules related to total meter metering modules on pipelines in the electric energy meter with the three-way array structure of 1 st stage and 2 nd stage are connected in series with the user electric energy metering modules on pipelines in the electric energy meter with the three-way array structure of 1 st stage and 2 nd stage;
adjacent user electric energy metering modules related to total meter metering modules on pipelines in the electric energy meter with the three-way array structure of the next stage 1 part 2 are connected in series with the user electric energy metering modules on pipelines in the electric energy meter with the three-way array structure of the next stage 1 part 2;
by analogy, the setting of detecting the same user line is realized through the existence of the electric energy metering modules in the electric energy meter with the adjacent two-stage 1-2 three-way array structure, so that the comparison calculation and the magnitude transmission of electric energy data are realized; therefore, after the metering errors of the electric energy metering modules in the electric energy meter of the three-way array structure of 1:2 at any stage are calculated, the data after corresponding metering compensation are used as the known data of the metering errors of the electric energy metering modules in the electric energy meter of the three-way array structure of 1:2 at the next stage.
3. The electric energy measurement system composed of electric energy meters with three-way array structures according to claim 1, wherein the electric energy measurement system comprises n electric energy meters with three-way array structures, wherein the electric energy meters with three-way array structures are mutually independent;
the electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series to any pipeline branch of any three-way array structure electric energy meter of the n three-way array structures electric energy meters.
4. The electric energy measurement system composed of the electric energy meter with the three-way array structure according to claim 1, wherein the electric energy measurement system further comprises an error reference standard device, and the error reference standard device is connected in series on any pipeline branch of the electric energy meter with the three-way array structure;
when the error reference standard device is arranged on a pipeline branch of the three-way array of the last stage 1-2, transmitting a reference error value in a progressive calculation mode from a lower stage to an upper stage so as to calibrate an electric energy measurement system and obtain error-free data or equal error data;
when the error reference standard device is arranged on a pipeline branch of the three-way array of 1:2 at the uppermost stage, transmitting a reference error value in a progressive calculation mode from the upper stage to the lower stage so as to calibrate the electric energy measurement system, and obtaining error-free data or equal error data;
When the error reference standard device is arranged on a pipeline branch of the three-way array of the intermediate stage 1 and 2, the reference error value is transmitted in a mode of progressive calculation from the intermediate stage to the upper stage and in a mode of progressive calculation from the intermediate stage to the lower stage, so that the electric energy measurement system is calibrated, and error-free data or equal error data are obtained.
5. The system for measuring electric energy by using the three-way array electric energy meter according to claim 1, wherein the electric energy measuring system comprises a microprocessor and a data transmission module, the microprocessor is connected with each electric energy metering module, the data transmission module is connected with the microprocessor, and is used for calculating error edges of the three-way array electric energy meter and/or sending electric energy data collected from each electric energy metering module to a cloud server.
6. The electric energy measuring system of claim 1, wherein the electric energy meter is an ac electric energy meter or a dc electric energy meter.
7. The electric energy measurement system composed of the electric energy meters with the three-way array structures according to claim 1, wherein wiring terminals for the line access of the electric energy meters of the adjacent users are arranged or reserved on the electric energy meter body or the meter shell, so that the line access of the electric energy meters of the adjacent users is facilitated.
8. The electric energy measurement system composed of the electric energy meter with the three-way array structure according to claim 7, wherein the wiring terminal of the electric energy meter with the three-way array structure is internally connected with 1 user metering module of the electric energy meter with the user in the user meter body, the electric energy metering modules on the adjacent user electric energy meter lines connected with the wiring terminal are in a serial connection relationship, the electric energy on the same line is measured, and the electric energy data of the adjacent user metering module and the electric energy metering module on the adjacent user electric energy meter in the user electric energy meter body on the same line and errors thereof are read and calculated to realize the magnitude transmission of the electric energy data.
9. The measuring method of the electric energy measuring system formed by the electric energy meters with the three-way array structure is characterized in that the electric energy measuring system formed by the electric energy meters with the three-way array structure comprises the following steps: the electric energy meter is of a three-way array structure with at least two stages of 1-2, wherein the three-way array with 1-2 of each stage comprises 1 total surface metering module positioned on a pipeline, 2 own user electric energy metering modules positioned on the pipeline and adjacent user electric energy metering modules, and the relative electric energy conservation relation is formed by the 1 total surface metering modules positioned on the pipeline, the 2 own user electric energy metering modules positioned on the pipeline and the adjacent user electric energy metering modules;
The electric energy meter comprises a three-way array structure, a pipeline, a user electric energy metering module, a power meter and a power meter, wherein the three-way array structure comprises two adjacent stages of 1-2 electric energy meters, the power meter of the three-way array structure comprises a three-way array structure of 1-2 electric energy meters of the upper stage and the power meter of the three-way array structure of 2 electric energy meters of the lower stage is positioned on the pipeline, and the user electric energy metering modules of the three-way array structure of 2 electric energy meters of the lower stage are connected in series, so that all adjacent users in the existing electric energy measuring system to be detected are connected in series through the three-way array structure of the electric energy meters of the multiple stages, and electric energy data comparison calculation and magnitude transmission are realized;
the error checking method comprises the following steps:
designating or establishing an error reference standard device in the electric energy measurement system and giving a reference error value to the error reference standard device;
collecting original measurement data of the electric energy metering modules on all pipeline branches of the electric energy meters of all three-way array structures in the electric energy measuring system and original measurement data of the error reference standard device;
calculating to obtain reference measurement error values of a total meter module, a user electric energy meter module and an adjacent user electric energy meter module in the three-way array of 1:2 where the error reference standard device is located by utilizing a mathematical model established by relative electric energy conservation relation;
Acquiring an electric energy meter of a three-way array structure with a 1-to-2 relation of the upper stage or the lower stage with the electric energy meter of the three-way array structure with the calculated reference measurement error value, and calculating the reference measurement error values of a total meter metering module, a user electric energy metering module and an adjacent user electric energy metering module in the three-way array with the corresponding upper stage or the lower stage of 1-to-2 by utilizing the relative electric energy conservation relation;
calculating the reference measurement error value process of the electric energy meters of the 1-minute 2 three-way array structure through one or more previous or next stages, so as to obtain the reference measurement error values of the electric energy meters of all three-way array structures in the electric energy measurement system, and compensating the original measurement data according to the reference measurement error value of the electric energy meters of each three-way array structure to obtain equal-error data or error-free data;
the method comprises the steps of connecting an electric energy metering module with known or unknown errors into any pipeline branch of 1 electric energy meter with a 1-to-2 three-way array structure in series, and using the pipeline branch as an error reference standard device to finish electric energy meter error calculation corresponding to the 1-to-2 three-way array structure; the same known or unknown error electric energy metering module is connected into any pipeline branch of the adjacent 1-2 three-way array structure electric energy meter in series through pipeline switching, and is used as an error reference standard device to complete the error calculation of the adjacent 1-2 three-way array structure electric energy meter.
10. The method for measuring the electric energy measurement system formed by the three-way array electric energy meter according to claim 9, wherein the compensating the original measurement data according to the reference measurement error values of each total meter measurement module, the user electric energy measurement module and the adjacent user electric energy measurement module to obtain the equal error data or the error-free data comprises:
compensating corresponding original measurement data by using the reference measurement error value to obtain equal error data of the reference error value of each electric energy metering module relative to the error reference standard device; when the delta X deviation exists between the true error value and the reference error value of the error reference standard device, compensating the equal error data of the corresponding total meter modules, the user electric energy meter module and the adjacent user electric energy meter module by utilizing the delta X deviation to obtain error-free data; or,
and directly calculating error-free data of the electric energy meter corresponding to each three-way array structure according to the real error value of the error reference standard device.
11. The method for measuring the electric energy of the electric energy measuring system composed of the three-way array structure according to claim 10, wherein the Δx deviation between the true error value of the error reference standard device and the reference error value is obtained, specifically:
Taking down the electric energy metering module selected as an error reference standard device, and measuring the real error value of the taken-down electric energy metering module; and subtracting the reference error value of the selected electric energy metering module from the actual error value of the removed electric energy metering module to obtain DeltaX deviation.
12. The method for measuring the electric energy of the electric energy measuring system composed of the three-way array structure electric energy meter according to claim 10, wherein the error reference standard device and the assigned reference error value are determined specifically as follows:
a first electric energy metering module unit with a known true error value is connected in series on any pipeline branch of an electric energy meter with any three-way array structure of the electric energy metering system;
in the operation process of the electric energy measurement system, respectively reading electric energy data of the first electric energy measurement module unit and electric energy data of the electric energy measurement module on the selected pipeline branch, and calculating a real error value of the electric energy measurement module on the selected pipeline branch;
the power metering modules on the selected pipeline branches serve as error reference standard devices, and the calculated actual error values of the power metering modules on the selected pipeline branches are used for calculating the actual error of each connected power metering module in the power metering system.
13. The method for measuring the electric energy of the electric energy measuring system composed of the three-way array structure according to claim 10, wherein the reference error value of the error reference standard device comprises:
in the electric energy measurement system, after any electric energy measurement module is selected as an error reference standard device, a preset reference error value is matched with a measurement error of the error reference standard device, wherein the difference value between the preset reference error value and a real error value of the error reference standard device is equal to DeltaX deviation.
14. The method for measuring the electric energy of the electric energy measuring system composed of the three-way array structure according to claim 10, wherein the method for measuring the electric energy of the electric energy system composed of the three-way array structure further comprises:
after the original measurement data of the electric energy metering module are collected, determining the similarity condition of each original measurement data;
if the similarity of at least two groups of original measurement data is larger than a preset similarity threshold, adopting a hierarchical calculation mode to calculate measurement errors of each electric energy metering module in a cascading manner so as to verify the original measurement data;
if the similarity of each group of original measurement data is smaller than a preset similarity threshold value, the electric energy meter of the three-way array structure positioned at the last stage of 1-2 minutes and the electric energy meter of the three-way array structure positioned at the uppermost stage of 1-2 minutes are subjected to relative electric energy conservation relationship to obtain measurement errors of corresponding electric energy metering modules so as to verify the original measurement data.
15. The method for measuring the power measuring system composed of the three-way array structured power meter according to claim 9, wherein after the layout of the three-way array in the power measuring system is completed and the calculation of the power measuring errors of the power measuring modules respectively provided on the 1-inlet and 2-outlet lines is completed, the continuous iterative calculation of the errors of the power measuring devices in the power measuring system on the corresponding pipeline is completed by using the measurement data after the correction of the errors in the three-way array.
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| CN114152807A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Error self-checking three-phase electric energy meter and measuring system and method thereof |
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