CN114152809B - Smart electric meter with error self-checking function and checking method thereof - Google Patents
Smart electric meter with error self-checking function and checking method thereof Download PDFInfo
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- CN114152809B CN114152809B CN202010935211.XA CN202010935211A CN114152809B CN 114152809 B CN114152809 B CN 114152809B CN 202010935211 A CN202010935211 A CN 202010935211A CN 114152809 B CN114152809 B CN 114152809B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The invention discloses an intelligent ammeter with an error self-checking function and a checking method thereof, wherein the method comprises the steps of connecting a metering standard device in series between a power transmission line of a first outgoing line port in an ammeter box and electric equipment on a corresponding power transmission line; the metering standard device and the intelligent ammeter establish a data communication link; the intelligent ammeter reads the electric energy data of the measurement standard device, and when the electric energy data uploaded by the measurement standard device arranged at the first outlet port is confirmed to be matched with the electric energy data of the first outlet measurement sensor corresponding to the first outlet port, the measurement error calculation of the inlet measurement sensor and the outlet measurement sensor is carried out according to the electric energy data of the inlet measurement sensor and the outlet measurement sensor which belong to the same time with the matched electric energy data. According to the invention, the layout structure of the metering sensor in the intelligent ammeter is adjusted, and the intelligent ammeter is finely adjusted, so that the complexity of metering error calculation is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of intelligent meter measurement, and particularly relates to an intelligent ammeter with an error self-checking function and a checking method thereof.
Background
At present, with the popularization of intelligent electric meters and the landing of the 5G Internet of things, living convenience of residents and the field of hydropower practice have qualitative leaps. The intelligent ammeter is too large in use amount in real life, and cannot be detached back to a laboratory for detecting metering errors. There is a need to find techniques and methods for online detection of these flow sensor errors.
Conventionally, a flow sensor is installed on a pipeline or a node of a verification method of a smart meter with an error self-verification function to be measured, the flow of each point is measured, and the measurement error of each flow sensor is verified respectively 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
The technical problem to be solved by the invention is that the verification method of the intelligent ammeter in the traditional ammeter box has the problems of large workload, low efficiency and high cost.
In order to achieve the above object, in a first aspect, the present invention provides a smart meter with an error self-checking function, wherein at least one collinear metering sensor and at least two single-wire metering sensors are provided in the smart meter, the single-wire metering sensors are used for metering and inputting electric energy data of each household, and the collinear metering sensors are used for metering electric energy data corresponding to two adjacent households; specific:
the jth co-linear metering sensor is disposed upstream of the ith single-wire metering sensor relative to the transmission conductor of the ith household; wherein the ith single-wire metering sensor is used for metering electric energy data on a transmission wire corresponding to an ith resident;
the (i+1) th single-wire metering sensor is disposed upstream of the (j) th collinear metering sensor relative to the (i+1) th household's transmission conductor; the (i+1) th single-wire metering sensor is used for metering electric energy data on a transmission wire corresponding to the (i+1) th resident;
wherein the jth collinearly metering sensor is used for simultaneously detecting electric energy data on transmission leads passing through the ith resident and the (i+1) th resident;
the electric energy data of the transmission wire of the (i+1) th resident and the transmission wire of the (i+2) th resident are detected by a (j+1) th collinear measuring sensor; wherein the j+1 th co-linear metering sensor is disposed upstream of the i+1 th single-linear metering sensor relative to the transmission conductor of the i+1 th household; an i+2 th single-wire metering sensor is disposed upstream of the j+1 th co-linear metering sensor relative to the transmission conductor of the i+2 th household; the (i+2) th single-wire metering sensor is used for detecting electric energy data of a transmission wire of the (i+2) th resident;
and arranging transmission wires of each resident in the intelligent ammeter, and corresponding collinear metering sensors and single-wire metering sensors according to the rule, wherein i is a natural number.
Preferably, an i+k single-wire metering sensor, an i+k+1 single-wire metering sensor and a j+k collinear metering sensor arranged in the intelligent ammeter form a relative energy conservation relation; wherein k is an integer greater than or equal to zero.
Preferably, each single-wire metering sensor, and each co-linear metering sensor are respectively connected with the server in a data communication manner through a wireless link.
Preferably, a processor and a wireless transceiver module are arranged in the intelligent ammeter, wherein the wireless transceiver module, each single-wire metering sensor and each collinear metering sensor are all in data communication connection with the processor.
In a second aspect, the present invention further provides a method for checking a smart meter with an error self-checking function, where the smart meter according to the first aspect is used, and the method for checking the smart meter includes:
the method comprises the steps that a measurement standard device is connected in series to a transmission lead where an mth single-wire measurement sensor in the intelligent ammeter is located; the metering standard device establishes a data communication link with a processing module or a server of the intelligent ammeter; wherein the value range of m is the same as the value range of i;
the intelligent ammeter reads the electric energy data of the measurement standard device, and according to the m single-wire measurement sensor which belongs to the same time with the electric energy data, the n collinear measurement sensor which is positioned at the upstream of a transmission guide line where the m single-wire measurement sensor is positioned, and the m+1 single-wire measurement sensor which is positioned at the downstream of the collinear measurement sensor, the first-stage relative measurement conservation relation formed by the three sensors is calculated, so that the measurement error values of the three sensors are obtained.
Preferably, according to the calculated measurement error value of the (m+1) th single-wire measurement sensor and a second-stage relative measurement conservation relation formed by the (m+1) th single-wire measurement sensor, the (m+2) th single-wire measurement sensor and the (n+1) th single-wire measurement sensor, the measurement error values of the (m+2) th single-wire measurement sensor and the (n+1) th single-wire measurement sensor are calculated;
and establishing relative measurement conservation relations of other single-line measurement sensors and collinear measurement sensors in the intelligent ammeter according to the grading relation, and solving to obtain respective corresponding measurement error values.
Preferably, the first-stage relative measurement conservation relation formed by the three components is used for calculating to obtain measurement error values of the three components, and the method specifically comprises the following steps:
for the nth collinear measuring sensor, the m single-line measuring sensor and the mth single-line measuring sensor, the flow accords with the relative energy conservation relation, namely the following formula is satisfied:
w n (1+x n )＝w m (1+x m )+w m+1 (1+x m+1 )
wherein w is n ，x n 、w m ，x m And w m+1 ，x m+1 Respectively represents the original corresponding to the nth collineation metering sensor, the m single-line metering sensor and the mth single-line metering sensorInitially detecting data and a metering error variable;
wherein x is m The method is obtained by directly solving the measurement standard device connected in series on a transmission wire where the mth single-wire measurement sensor is positioned.
Preferably, said x m The method is obtained by directly solving the measurement standard device connected in series on a transmission wire where the mth single-wire measurement sensor is located, and specifically comprises the following steps:
the m single-wire metering sensor and the transmission wire where the m single-wire metering sensor are positioned are connected in series with a metering standard device, and the following formula is satisfied:
w standard of ＝w m (1+x m )
Wherein w is Standard of And w m Raw detection data, x, representing the measurement standard and the mth single-wire measurement sensor, respectively m Representing the measurement error variable of the mth single-line measurement sensor.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
according to the invention, the layout structure of the metering sensors in the intelligent electric meter is adjusted, so that a cascade structure which internally meets the law of relative energy conservation is formed for each intelligent electric meter, and the calculation break of the equation of relative energy conservation of the intelligent electric meter is formed by arranging the metering standard device, so that the metering errors of the metering sensors in the intelligent electric meter are calculated respectively. Compared with the prior art, the method achieves the great reduction of the complexity of calculation of the metering error by finely adjusting the intelligent ammeter.
Compared with the prior art, the invention forms a loop-and-loop link of the relative energy conservation relation in the intelligent ammeter, namely the metering error calculated by the relative energy conservation relation of the previous stage becomes a part of the relative energy conservation relation of the next stage, so that each metering sensor in the relative energy conservation relation of the next stage is obtained by solving as the known quantity.
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 smart meter with an error self-checking function according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another smart meter with an error self-checking function according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a circuit structure based on a sharing standard according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a verification method of a smart meter according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a verification method of a smart meter according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an error checking method according to an embodiment of the present invention;
fig. 7 is a flowchart of another implementation manner based on the error checking method shown in fig. 6 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.
The measurement standard device is used as an error reference standard, so that the determined error in the description refers to a standard device, and in a certain sense, flow data reported by the measurement standard device and flow data reported by a single-wire measurement sensor with a serial relation is directly solved, and then the measurement error of the single-wire measurement sensor is substituted into one of the known quantities of a relative energy conservation equation in the calculation process, so that the measurement error of other measurement sensors in the intelligent ammeter is solved.
The conventional application scenario of the smart meter provided by the invention is as follows: household electricity meters for individual users, power supply meters for laboratories, and the like; the wire inlet end is usually of a single port and is matched with a grounding wire; for the industrial electric meter of the factory building, the inlet wire end of the industrial electric meter is three-phase line three-port, and for the embodiment of the invention, the application scene of the household electric meter of the individual user is focused, so that in the subsequent embodiment of the invention, a single inlet wire sensor is taken as an example in the process of showing specific details.
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.
Example 1:
the invention provides a smart meter with an error self-checking function, wherein at least one collinear measuring sensor and at least two single-wire measuring sensors are arranged in the smart meter, the single-wire measuring sensors are used for measuring and inputting electric energy data of each household, the collinear measuring sensors are used for measuring the electric energy data corresponding to two adjacent households, it is pointed out that sign numbers i and j used in the embodiment of the invention are only used for expressing that different measuring sensors are convenient for individuals, the sensor does not have special limiting significance, and in addition, the grading relation of the single-wire measuring sensors and the collinear measuring sensors in the whole smart meter is respectively represented by the sign numbers i and j, as shown in fig. 1, the specific:
the jth co-linear metering sensor is disposed upstream of the ith single-wire metering sensor relative to the transmission conductor of the ith household (as shown in fig. 1, the upstream being relative to the direction of power transmission on the transmission conductor); wherein the ith single wire metering sensor is used to meter electrical energy data on the transmission conductor corresponding to the ith household. In general terms, i is counted from 1, but in this embodiment, i is expressed as i to represent universality of the content, that is, i is any natural number, which is also to describe that the embodiment of the present invention is focused on the core characterization structure in the whole smart meter, and after the features of the corresponding core characterization structure are clear, those skilled in the art extend the implementation scale to the extent needed in the application scenario without creative labor, and will not be repeated.
The (i+1) th single-wire metering sensor is disposed upstream of the (j) th collinear metering sensor relative to the (i+1) th household's transmission conductor; the (i+1) th single-wire metering sensor is used for metering electric energy data on a transmission wire corresponding to the (i+1) th resident;
wherein the jth collinearly metering sensor is used for simultaneously detecting electric energy data on transmission leads passing through the ith resident and the (i+1) th resident;
the electric energy data of the transmission wire of the (i+1) th resident and the transmission wire of the (i+2) th resident are detected by a (j+1) th collinear measuring sensor; wherein the j+1 th co-linear metering sensor is disposed upstream of the i+1 th single-linear metering sensor relative to the transmission conductor of the i+1 th household; an i+2 th single-wire metering sensor is disposed upstream of the j+1 th co-linear metering sensor relative to the transmission conductor of the i+2 th household; the (i+2) th single-wire metering sensor is used for detecting electric energy data of a transmission wire of the (i+2) th resident;
and arranging transmission wires of each resident in the intelligent ammeter, and corresponding collinear metering sensors and single-wire metering sensors according to the rule, wherein i is a natural number.
According to the embodiment of the invention, the layout structure of the metering sensors in the intelligent electric meter is adjusted, so that a cascade structure which internally meets the relative energy conservation law is formed for each intelligent electric meter, and the calculation break of the relative energy conservation equation of the intelligent electric meter is formed by arranging the metering standard device, so that the metering errors of the metering sensors in the intelligent electric meter are calculated respectively. Compared with the prior art, the method achieves the great reduction of the complexity of calculation of the metering error by finely adjusting the intelligent ammeter.
Compared with the prior art, the invention forms a loop-and-loop link of the relative energy conservation relation in the intelligent ammeter (skillfully forms the cascading effect shown in the figure 1), namely the metering error calculated by the relative energy conservation relation of the previous stage becomes a part of the relative energy conservation relation of the next stage, so that each metering sensor in the relative energy conservation relation of the next stage is obtained by solving as the known quantity. Therefore, links which require intervention of operators in the compression detection process can be reduced as much as possible, and the detection efficiency is improved. Taking fig. 1 as an example, the 1 st-stage relative energy conservation relationship formed by the jth collinear measuring sensor, the ith single-wire measuring sensor and the (i+1) th single-wire measuring sensor; the (i+1) th single-wire metering sensor, the (j+1) th collinear metering sensor and the (i+2) th single-wire metering sensor form a 2 nd-stage relative energy conservation relation; the i+2 single-wire metering sensor, the j+2 collinear metering sensor and the i+3 single-wire metering sensor form a 3 rd-stage relative energy conservation relation. In the above example, it is not difficult to issue that one single-line measurement sensor in the preceding stage becomes one loop in the relative energy conservation relation of the next stage (i.e., loop-to-loop characteristics), so that the measurement error of each measurement sensor in the relative energy conservation relation can be obtained by solving in one of the relative energy conservation relations, and then the measurement error values of the measurement sensors in the other relative energy conservation relations can be obtained by solving in the loop-to-loop characteristics.
In the embodiment of the invention, a technical summary of the relative energy conservation relationship of the ring-to-ring is as follows: the ith single-wire metering sensor, the jth single-wire metering sensor and the jth single-wire metering sensor form a relative energy conservation relation; wherein k is an integer greater than or equal to zero.
In the embodiment of the invention, at least the following two modes are given for reporting the electric energy data detected by each metering sensor.
In one embodiment, as shown in fig. 2, each single-wire metering sensor, and each co-wire metering sensor, are in data communication with a server via a wireless link. The method has the advantages that the layout of the metering sensor in the intelligent electric meter is more flexible, namely, the temporary addition or deletion of the metering sensor in the designed intelligent electric meter can not cause larger influence on the whole electric energy data acquisition, only the corresponding relation between the addition/subtraction metering sensor and the user identity mark is registered on the server side, and the corresponding relation of the corresponding intelligent electric meter mark is newly added in an optional mode, so that convenience is provided for management.
In the second mode, as shown in fig. 3, a processor and a wireless transceiver module are disposed in the smart meter, where the wireless transceiver module, each single-wire metering sensor and the collinear metering sensor are all connected with the processor in a data communication manner. In fig. 3, the data communication links between the respective metering sensors (including single-wire metering sensors and co-wire metering sensors) and the processor are represented using respective dashed double-headed arrows (the actual representation is accomplished by a physical data line, or by establishing a connection via bluetooth, 5G wireless signals, or wifi signals, etc., not specifically illustrated herein). The method has the advantages that the number of data channels required to be established on the server side is reduced, and the data processing pressure of the server is reduced.
Example 2:
the embodiment of the invention also provides a verification method of the intelligent ammeter with the error self-verification function, which uses the intelligent ammeter provided in the embodiment 1, as shown in fig. 4, and comprises the following steps:
in step 201, a measurement standard device is connected in series to a transmission wire where an mth single-wire measurement sensor in the smart meter is located.
The metering standard device establishes a data communication link with a processing module or a server of the intelligent ammeter; wherein, the value range of m is the same as the value range of i. For example, the m is directly replaced by i in embodiment 1, which is characterized by i+1 in embodiment 1, where the identifier i in embodiment 1 is not directly used, or is chosen to illustrate that in the embodiment of the present invention, the transmission line of the tandem gauge is the transmission line that any unidirectional gauge sensor in embodiment 1 is responsible for detecting.
In step 202, the smart meter reads the electric energy data of the measurement standard device, and calculates and obtains measurement error values of the three first-stage relative measurement conservation relations according to an mth single-wire measurement sensor which belongs to the same time with the electric energy data, an nth collinear measurement sensor positioned at the upstream of a transmission wire where the mth single-wire measurement sensor is positioned, and an (m+1) th single-wire measurement sensor positioned at the downstream of the collinear measurement sensor;
taking the smart meter shown in fig. 1 of embodiment 1 as an example, if the mth single-wire metering sensor is embodied as the ith single-wire metering sensor of embodiment 1, the nth collinear metering sensor at this time is embodied as the jth collinear metering sensor of fig. 1.
According to the embodiment of the invention, the layout structure of the metering sensors in the intelligent electric meter is adjusted, so that a cascade structure which internally meets the relative energy conservation law is formed for each intelligent electric meter, and the calculation break of the relative energy conservation equation of the intelligent electric meter is formed by arranging the metering standard device, so that the metering errors of the metering sensors in the intelligent electric meter are calculated respectively. Compared with the prior art, the method achieves the great reduction of the complexity of calculation of the metering error by finely adjusting the intelligent ammeter.
Only the measurement errors of the measurement sensors in the first-order relative measurement conservation relation are calculated through the steps 201 to 202, and as a complete implementation scheme, the calculation of the measurement errors of all the measurement sensors in the smart meter as shown in the embodiment 1 is completed according to the calculation results of the steps 201 to 202. Thus, in connection with embodiments of the present invention, there is also a preferred implementation, as shown in fig. 5, of a method of inspection comprising:
in step 203, the measurement error values of the (m+2) th single-wire measurement sensor and the (n+1) th single-wire measurement sensor are calculated according to the calculated measurement error values of the (m+1) th single-wire measurement sensor and the second-stage relative measurement conservation relation formed by the (m+1) th single-wire measurement sensor, the (m+2) th single-wire measurement sensor and the (n+1) th single-wire measurement sensor.
In step 204, the relative measurement conservation relations of other single-line measurement sensors and collinear measurement sensors in the intelligent ammeter are established according to the grading relation, and the measurement error values corresponding to the single-line measurement sensors and the collinear measurement sensors are obtained through solving.
In order to further describe implementation details of the embodiment of the present invention, the implementation details are presented in a formula manner, and a first-stage relative measurement conservation relationship formed by the three components is calculated to obtain measurement error values of the three components, which specifically includes:
for the nth collinear measuring sensor, the m single-line measuring sensor and the mth single-line measuring sensor, the flow accords with the relative energy conservation relation, namely the following formula is satisfied:
w n (1+x n )＝w m (1+x m )+w m+1 (1+x m+1 )
wherein w is n ，x n 、w m ，x m And w m+1 ，x m+1 Representing the original detection data and the metering error variable corresponding to the nth collinear metering sensor, the m single-line metering sensor and the mth single-line metering sensor respectively;
wherein x is m The method is obtained by directly solving the measurement standard device connected in series on a transmission wire where the mth single-wire measurement sensor is located, and specifically comprises the following steps:
the m single-wire metering sensor and the transmission wire where the m single-wire metering sensor are positioned are connected in series with a metering standard device, and the following formula is satisfied:
w standard of ＝w m (1+x m )
Wherein w is Standard of And w m Raw detection data, x, representing the measurement standard and the mth single-wire measurement sensor, respectively m Representing the measurement error variable of the mth single-line measurement sensor.
Example 3:
the embodiment of the present invention also provides a verification method of a smart meter with an error self-verification function, using the smart meter set forth in embodiment 1, and embodiment 3 of the present invention is different from embodiment 2 in that in embodiment 2 the measurement standard is set in a manner similar to that of a single-wire measurement sensor, and in test 3 of the present invention the measurement standard is set in a manner similar to that of a common-wire measurement sensor, as shown in fig. 6, the verification method includes:
in step 301, a measurement standard device is connected in series to a transmission line where a p-th collinear measurement sensor in the smart meter is located.
The metering standard device establishes a data communication link with a processing module or a server of the intelligent ammeter; wherein the value range of p is the same as the value range of j. For example, p is directly replaced with j in embodiment 1, which is characterized by j+1 in embodiment 1, where the identification j in embodiment 1 is not directly used, or is chosen to illustrate that in the embodiment of the present invention, the transmission line of the tandem gauge is the transmission line for which any of the collinear gauge sensors in embodiment 1 is responsible for detection.
In step 302, the smart meter reads the electrical energy data of the measurement standard device, and calculates the measurement error values of the three components according to the first-stage relative measurement conservation relationship formed by the p-th collinear measurement sensor, the q-th single-wire measurement sensor and the q+1-th single-wire measurement sensor, which are positioned on the transmission wire and are responsible for detecting the transmission wire, and the p-th collinear measurement sensor and the q+1-th single-wire measurement sensor, which are the same time as the electrical energy data.
Taking the smart meter shown in fig. 1 of embodiment 1 as an example, if the p-th collinear measuring sensor is embodied as the j-th collinear measuring sensor in embodiment 1, the q-th single-wire measuring sensor and the q+1-th single-wire measuring sensor are embodied as the i-th single-wire measuring sensor and the i+1-th single-wire measuring sensor in fig. 1.
According to the embodiment of the invention, the layout structure of the metering sensors in the intelligent electric meter is adjusted, so that a cascade structure which internally meets the relative energy conservation law is formed for each intelligent electric meter, and the calculation break of the relative energy conservation equation of the intelligent electric meter is formed by arranging the metering standard device, so that the metering errors of the metering sensors in the intelligent electric meter are calculated respectively. Compared with the prior art, the method achieves the great reduction of the complexity of calculation of the metering error by finely adjusting the intelligent ammeter.
Only the measurement errors of the measurement sensors in the first-order relative measurement conservation relation are calculated through the steps 301 to 302, and as a complete implementation scheme, the calculation is needed to complete the measurement errors of all the measurement sensors in the smart meter as shown in the embodiment 1 according to the calculation results of the steps 301 to 302. Thus, in connection with embodiments of the present invention, there is also a preferred implementation, as shown in fig. 7, of a method of inspection comprising:
in step 303, the measurement error values of the (q+2) th single-wire measurement sensor and the (p+1) th single-wire measurement sensor are calculated according to the calculated measurement error values of the (q+1) th single-wire measurement sensor and the second-stage relative measurement conservation relation formed by the (q+1) th single-wire measurement sensor, the (q+2) th single-wire measurement sensor and the (p+1) th single-wire measurement sensor.
In step 304, the relative measurement conservation relations of other single-line measurement sensors and collinear measurement sensors in the intelligent ammeter are established according to the grading relation, and the measurement error values corresponding to the single-line measurement sensors and the collinear measurement sensors are obtained through solving.
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 (5)
1. The intelligent ammeter with the error self-checking function is characterized in that at least one collinear metering sensor and at least two single-wire metering sensors are arranged in the intelligent ammeter, wherein the single-wire metering sensors are used for metering and inputting electric energy data of each resident, and the collinear metering sensors are used for metering electric energy data corresponding to two adjacent residents; specific:
the jth co-linear metering sensor is disposed upstream of the ith single-wire metering sensor relative to the transmission conductor of the ith household; wherein the ith single-wire metering sensor is used for metering electric energy data on a transmission wire corresponding to an ith resident;
the (i+1) th single-wire metering sensor is disposed upstream of the (j) th collinear metering sensor relative to the (i+1) th household's transmission conductor; the (i+1) th single-wire metering sensor is used for metering electric energy data on a transmission wire corresponding to the (i+1) th resident;
wherein the jth collinearly metering sensor is used for simultaneously detecting electric energy data on transmission leads passing through the ith resident and the (i+1) th resident;
the electric energy data of the transmission wire of the (i+1) th resident and the transmission wire of the (i+2) th resident are detected by a (j+1) th collinear measuring sensor; wherein the j+1 th co-linear metering sensor is disposed upstream of the i+1 th single-linear metering sensor relative to the transmission conductor of the i+1 th household; an i+2 th single-wire metering sensor is disposed upstream of the j+1 th co-linear metering sensor relative to the transmission conductor of the i+2 th household; the (i+2) th single-wire metering sensor is used for detecting electric energy data of a transmission wire of the (i+2) th resident;
arranging transmission wires of each resident in the intelligent ammeter, and corresponding collinear metering sensors and single-wire metering sensors according to the rules, wherein i is a natural number;
the ith single-wire metering sensor, the jth single-wire metering sensor and the jth single-wire metering sensor form a relative energy conservation relation; wherein k is an integer greater than or equal to zero;
the first-stage relative measurement conservation relation formed by the three components is used for calculating measurement error values of the three components, and the method specifically comprises the following steps:
for the nth collinear metering sensor, the mth single-wire metering sensor and the (m+1) th single-wire metering sensor, the flow accords with the relative energy conservation relation, namely the following formula is satisfied:
wherein,、/>and->Representing the original detection data and the metering error variable corresponding to the nth collinear metering sensor, the mth single-line metering sensor and the (m+1) th single-line metering sensor respectively;
wherein,the method is obtained by directly solving the measurement standard device connected in series on a transmission lead where the mth single-wire measurement sensor is positioned;
the saidThe method is obtained by directly solving the measurement standard device connected in series on a transmission wire where the mth single-wire measurement sensor is located, and specifically comprises the following steps:
the transmission wire where the mth single-wire metering sensor is located is connected in series with a metering standard device, and the following formula is satisfied:
wherein,and->Raw test data representing the measurement standard and the mth single-wire measurement sensor, respectively, +.>Representing the measurement error variable of the mth single-line measurement sensor.
2. The smart meter with error self-checking function of claim 1, wherein each single-wire metering sensor and each co-wire metering sensor are in data communication connection with the server via a wireless link, respectively.
3. The smart meter with error self-checking function according to claim 1, wherein a processor and a wireless transceiver module are provided in the smart meter, wherein the wireless transceiver module, each single-wire metering sensor and the collinear metering sensor are all in data communication connection with the processor.
4. A method for checking a smart meter having an error self-checking function, wherein the smart meter according to any one of claims 1 to 3 is used, the method comprising:
the method comprises the steps that a measurement standard device is connected in series to a transmission lead where an mth single-wire measurement sensor in the intelligent ammeter is located; the metering standard device establishes a data communication link with a processing module or a server of the intelligent ammeter; wherein the value range of m is the same as the value range of i;
the intelligent ammeter reads the electric energy data of the measurement standard device, and according to the m single-wire measurement sensor which belongs to the same time with the electric energy data, the n collinear measurement sensor which is positioned at the upstream of a transmission guide line where the m single-wire measurement sensor is positioned, and the m+1 single-wire measurement sensor which is positioned at the downstream of the collinear measurement sensor, the first-stage relative measurement conservation relation formed by the three sensors is calculated, so that the measurement error values of the three sensors are obtained.
5. The method according to claim 4, wherein the measurement error values of the m+2th single-wire measurement sensor and the n+1th single-wire measurement sensor are calculated according to the calculated measurement error values of the m+1th single-wire measurement sensor and a second-stage relative measurement conservation relationship formed by the m+1th single-wire measurement sensor, the m+2th single-wire measurement sensor and the n+1th single-wire measurement sensor;
and establishing relative measurement conservation relations of other single-line measurement sensors and collinear measurement sensors in the intelligent ammeter according to the grading relation, and solving to obtain respective corresponding measurement error values.
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