CN114089260A - Electric quantity measurement correction method and device and micro-grid system - Google Patents
Electric quantity measurement correction method and device and micro-grid system Download PDFInfo
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- 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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- H—ELECTRICITY
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Abstract
The invention discloses an electricity metering correction method, an electricity metering correction device and a micro-grid system. Wherein, the method comprises the following steps: detecting that the ammeter is disconnected; determining an estimated value of the electric quantity change during the offline period of the electric meter according to stored information and the system operation condition during the offline period of the electric meter, wherein the stored information is obtained by storing and periodically updating the electric quantity information measured by each electric meter in the system; and after the electric meter is on line again, updating the metering initial value of the electric meter according to the electric quantity change estimated value. The invention realizes the active correction of the electric quantity information counted by the electric meter during the fault or replacement period of the electric meter, improves the error of the statistical data of the electric meter to a certain extent, ensures that the electric quantity information can still be normally accumulated after the electric meter is disconnected, ensures the accuracy of the display data of the system display end as much as possible, does not need maintenance personnel to manually guide in the electric quantity information of the original electric meter when a new electric meter is replaced, realizes the automatic update of the metering initial value of the electric meter, and ensures the high efficiency of the system.
Description
Technical Field
The invention relates to the technical field of electric meters, in particular to an electric meter quantity correction method, an electric meter quantity correction device and a micro-grid system.
Background
The electric meter is an important component of the microgrid system, can be used for measuring information such as photovoltaic power generation capacity, energy storage charging and discharging capacity, wind power generation capacity and power consumption of power loads, and is an important data source for the microgrid management system to make a reliable and intelligent management strategy.
When the electric meter needs to be replaced, the original electric quantity statistical information in the electric meter is cleared and needs to be led into a new electric meter, the part of work needs manual lead-in by field maintenance personnel and is contrary to the high efficiency of the microgrid system, and the clearing of the electric quantity statistical information of the original electric meter can cause the confusion of data displayed by a display end of the microgrid system. In addition, when the electric meter has an unknown fault, if the microgrid system still operates normally, the electric quantity information during the fault period of the electric meter cannot be counted, the data displayed by the display end of the microgrid system will deviate, the reliability of the data is reduced, and meanwhile, if the electricity price transaction is involved, the calculation of the economic benefit of the microgrid system will be influenced.
Disclosure of Invention
The embodiment of the invention provides an electricity metering correction method, an electricity metering correction device and a micro-grid system, and aims to at least solve the problem that in the prior art, deviation is generated in electricity metering when an electricity meter is in fault or replaced.
In order to solve the above technical problem, an embodiment of the present invention provides an electricity quantity correction method, including:
detecting that the ammeter is disconnected;
determining an estimated value of electric quantity change during the offline period of the electric meter according to stored information and the system operation condition during the offline period of the electric meter, wherein the stored information is obtained by storing and periodically updating electric quantity information measured by each electric meter in the system;
and after the electric meter is on line again, updating the metering initial value of the electric meter according to the electric quantity change estimated value.
Optionally, determining an estimated value of the power change during the offline period of the power meter according to the stored information and the system operation condition during the offline period of the power meter, including:
determining the operation time length of the normal operation of the whole system during the offline period of the electric meter;
acquiring the electric quantity information of the ammeter in a preset time before the disconnection from the stored information as reference data;
and calculating to obtain the estimated value of the electric quantity change according to the reference data and the running time.
Optionally, the reference data includes: the system normal operation time and the electric quantity variation of the electric meter within preset time before the electric meter is disconnected;
calculating to obtain the estimated value of the electric quantity change according to the reference data and the running time, wherein the step of calculating to obtain the estimated value of the electric quantity change comprises the following steps:
calculating the electric quantity variation of unit operation time in preset time before the disconnection according to the reference data;
and calculating the product of the operation time length and the electric quantity variation of the unit operation time to obtain the electric quantity variation estimated value.
Optionally, updating the measurement initial value of the electricity meter according to the estimated value of the change of the electric quantity includes:
acquiring an accumulated electric quantity value before the electric meter is disconnected from the stored information;
calculating the sum of the accumulated electric quantity value before the electric meter is disconnected and the electric quantity change estimated value to obtain the accumulated electric quantity estimated value of the electric meter;
and updating the electric quantity information corresponding to the electric meter in the stored information according to the accumulated electric quantity estimated value, and sending the accumulated electric quantity estimated value to the electric meter to be used as a metering initial value of the electric meter.
Optionally, detecting that there is an electricity meter drop, including: and if the set time of the appointed time point is exceeded and the electric quantity information uploaded by the electric meter is not received, determining that the electric meter is disconnected.
Optionally, the periodically updating the information of the electric quantity measured by each electric meter in the system includes:
for each electric meter, under the condition that the electric meter is not disconnected, acquiring an actual metering value of accumulated electric quantity from the electric meter according to a preset period, and acquiring a latest recorded value of the accumulated electric quantity of the electric meter from the stored information;
comparing said actual metered value to said most recently recorded value;
if the actual metering value is larger than the latest recorded value, updating electric quantity information corresponding to the electric meter in the stored information;
and if the actual metering value is smaller than the latest recorded value, sending the latest recorded value to the electric meter so as to update the metering initial value of the electric meter.
An embodiment of the present invention further provides an electricity metering correction apparatus, including:
the detection module is used for detecting that the ammeter is disconnected;
the system comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining the electric quantity change estimated value during the offline period of the electric meter according to stored information and the system operation condition during the offline period of the electric meter, and the stored information is obtained by storing and periodically updating the electric quantity information measured by each electric meter in the system;
and the updating module is used for updating the metering initial value of the electric meter according to the electric quantity change estimated value after the electric meter is on line again.
An embodiment of the present invention further provides a microgrid system, including: a general data controller; at least one electric meter connected to the universal data controller; at least one device requiring metering of electricity; the universal data controller comprises the electric quantity metering correction device.
An embodiment of the present invention further provides a computer device, including: the device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the method of the embodiment of the invention.
Embodiments of the present invention also provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method according to the embodiments of the present invention.
By applying the technical scheme of the invention, after the electric meter is disconnected, the electric quantity change estimated value during the disconnection of the electric meter is determined according to the stored information and the system operation condition during the disconnection of the electric meter, and after the electric meter is re-on-line, the metering initial value of the electric meter is updated according to the electric quantity change estimated value, so that the electric quantity information counted by the electric meter is actively corrected during the fault or replacement of the electric meter, the error of the electric meter statistical data is improved to a certain extent, the electric quantity information can still be normally accumulated after the disconnection of the electric meter, the accuracy of the display data of a system display end is ensured as much as possible, in addition, the electric quantity information of the original electric meter is not required to be manually introduced by maintenance personnel during the replacement of a new electric meter, the automatic updating of the metering initial value of the electric meter is realized, and the high efficiency of the system is ensured.
Drawings
Fig. 1 is a flow chart of a method for correcting a fuel gauge according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a microgrid system topology according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a power metering correction according to an embodiment of the present invention;
fig. 4 is a block diagram of an electric quantity metering correction device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention and the accompanying drawings are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
The present embodiment provides a method for correcting the fuel gauge, which can be executed by a General Data Controller (GDC). The method can be applied to a microgrid system, and at least one electric meter can be accessed into the microgrid system.
Fig. 1 is a flowchart of a method for correcting electricity metering according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
s101, detecting that the ammeter is disconnected.
S102, determining the estimated value of the electric quantity change during the offline period of the electric meter according to stored information and the system operation condition during the offline period of the electric meter, wherein the stored information is obtained by storing and periodically updating the electric quantity information measured by each electric meter in the system.
And S103, after the electric meter is on line again, updating the metering initial value of the electric meter according to the electric quantity change estimated value.
The ammeter has a communication function and can upload the electric quantity information counted by the ammeter to the GDC. The information on the amount of electricity measured by the electricity meter may include: system uptime per day, charge change per day (e.g., charge growth), and cumulative charge value. The GDC locally stores the electric quantity information corresponding to each electric meter, and the update period of the stored information can be set according to the requirement, for example, set to 10 minutes, that is, the electric quantity information corresponding to the electric meter is stored every 10 minutes. Specifically, the electric quantity information corresponding to each electric meter may be stored in the GDC in a form of a table. The ammeter carries out data interaction with GDC, if the ammeter breaks down or changes, then the ammeter can drop the line. The measurement initial value of the electric meter means that the electric meter continues to perform the accumulated measurement of the electric quantity on the basis of the measurement initial value.
According to the embodiment, after the ammeter is disconnected, the electric quantity change estimated value during the disconnection of the ammeter is determined according to stored information and the system operation condition during the disconnection of the ammeter, after the ammeter is on line again, the metering initial value of the ammeter is updated according to the electric quantity change estimated value, the situation that the electric quantity information counted by the ammeter is actively corrected during the fault or replacement of the ammeter is realized, the error of the statistical data of the ammeter is improved to a certain extent, the electric quantity information can still be normally accumulated after the ammeter is disconnected, the accuracy of data displayed by a system display end is ensured as much as possible, in addition, the electric quantity information of the original ammeter is not required to be manually led in by maintenance personnel during the replacement of a new ammeter, the automatic updating of the metering initial value of the ammeter is realized, and the high efficiency of the system is ensured.
In one embodiment, the step S102 of determining the estimated power change during the offline power meter according to the stored information and the system operation during the offline power meter includes: determining the operation time length of the normal operation of the whole system during the offline period of the electric meter; acquiring electric quantity information of the electric meter within preset time before the electric meter is disconnected from the stored information as reference data; and calculating to obtain the estimated value of the electric quantity change according to the reference data and the running time.
The time from the disconnection of the electric meter to the re-connection of the electric meter is the disconnection time, and the operation time of the normal operation of the whole system is less than or equal to the disconnection time during the disconnection of the electric meter. The preset time is a preset time threshold for acquiring the reference data, and for example, the preset time may be set to the last day, the last three days, or the like.
According to the method and the device, based on the reference data and the running time length of the normal running of the whole system during the offline period of the electric meter, the estimated value of the electric quantity change during the offline period of the electric meter can be determined more accurately and reliably, so that the electric quantity information of the electric meter can be corrected.
After the electric meter is disconnected, if the whole system has faults, the system cannot normally operate, for example, the power utilization load has faults, and under the condition, the electric quantity information of the electric meter is not corrected.
The reference data may include: and the normal operation time and the electric quantity variation of the system in the preset time before the electricity meter is disconnected.
Further, calculating to obtain an estimated value of the electric quantity change according to the reference data and the operation duration, wherein the method comprises the following steps: calculating to obtain the electric quantity variation of unit operation time in preset time before the disconnection according to the reference data; and calculating the product of the operation time length and the electric quantity variation of the unit operation time to obtain the electric quantity variation estimated value. Therefore, the estimated value of the electric quantity change during the offline of the electric meter can be accurately calculated.
For example, the obtained reference data are the system uptime per day and the power variation per day 3 days before the disconnection, the average value T1 of the system uptime per day and the average value S2 of the power variation per day 3 days before the disconnection are calculated according to the reference data, and S2/T1 is calculated to obtain the power variation per unit of the operation time; for another example, all the electric quantity variable quantities within the preset time before the disconnection are added to obtain a total electric quantity variable quantity, all the system normal operation times within the preset time before the disconnection are added to obtain a total time, and then the total electric quantity variable quantity is calculated and divided by the total time to obtain the electric quantity variable quantity of the unit operation time.
In one embodiment, the step S103 of updating the measurement initial value of the electricity meter according to the power variation estimation value includes: acquiring an accumulated electric quantity value before the electric meter is disconnected from the stored information; calculating the sum of the accumulated electric quantity value before the electric meter is disconnected and the electric quantity change estimated value to obtain the accumulated electric quantity estimated value of the electric meter; and updating the electric quantity information corresponding to the electric meter in the stored information according to the accumulated electric quantity estimated value, and sending the accumulated electric quantity estimated value to the electric meter to be used as a metering initial value of the electric meter.
After the electric quantity information of the electric meter in the stored information of the GDC is updated, the content displayed by the display end of the system is also updated, so that the accuracy of the display data is ensured.
In the embodiment, the corrected accumulated electric quantity value is sent to the electric meter through the steps so as to update the metering initial value of the electric meter and ensure the accuracy of electric quantity metering after the electric meter is recovered.
In one embodiment, detecting that there is an electricity meter drop comprises: and if the set time of the appointed time point is exceeded and the electric quantity information uploaded by the electric meter is not received, determining that the electric meter is disconnected.
Wherein, the appointed time point is the time point when the electric meter sends the electric quantity information to the GDC. For example, the electricity meter actively uploads the electricity quantity information to the GDC according to a certain period, and the specified time point is the time when the period is reached. For another example, if the electric meter uploads the electric quantity information to the GDC in response to the command of the GDC, the specified time point is after the GDC sends the command for a certain time, that is, the electric meter generally uploads the electric quantity information within a certain time after the GDC sends the command. The set time is a preset time threshold value used for measuring whether the electric meter is disconnected or not. For example, the set time may be set to 20 seconds.
After the set time of the designated time point is exceeded, the electric quantity information uploaded by the electric meter cannot be received, the electric meter can be considered to be disconnected, and whether the electric meter breaks down or is replaced can be determined timely and reliably.
In one embodiment, the periodic updating of the information on the amount of electricity measured by each electricity meter in the system includes: aiming at each electric meter, under the condition that the electric meter is not disconnected, acquiring an actual metering value of the accumulated electric quantity from the electric meter according to a preset period, and acquiring a latest recorded value of the accumulated electric quantity of the electric meter from stored information; comparing the actual measured value with the latest recorded value; if the actual metering value is larger than the latest recording value, updating the electric quantity information corresponding to the electric meter in the stored information; and if the actual metering value is smaller than the latest recorded value, sending the latest recorded value to the electric meter so as to update the metering initial value of the electric meter. The preset period refers to an update period of the stored information, and may be set to 10 minutes, for example.
This embodiment is through comparing the actual metering value with this ammeter accumulative total electric quantity's latest record value in the information that has already been stored, can in time update the electric quantity information in information or the ammeter of having already been stored, guarantees two accuracy and uniformity.
The foregoing electricity quantity metering correction method is described below with reference to a specific embodiment, but it should be noted that the specific embodiment is only for better describing the present application and is not to be construed as limiting the present application. The same or corresponding terms as those of the above-described embodiments are explained, and the description of the present embodiment is omitted.
As shown in fig. 2, which is a schematic diagram of a topology structure of a microgrid system, the microgrid system includes: the system comprises a photovoltaic power generation subsystem 10, a photovoltaic subsystem end electric meter 11, an energy storage subsystem 20, an energy storage subsystem end electric meter 21, a power grid power supply 30, a power grid end electric meter 31, an electric load 40, an electric load end electric meter 41, a GDC 50 and a touch screen 60. In the GDC 50, each electric meter of the access system may establish corresponding electric quantity information.
The ammeter in the embodiment has a communication function, can send the self statistic electric quantity information, and can modify the initial value of electric quantity statistics. When each subsystem and power load in the microgrid system have faults, the faults can be automatically reported to the GDC 50.
In practical applications, power generation, grid power supply and power utilization generally involve accumulated electric quantity values, and the electric quantity metering can be corrected according to the method of the embodiment. The electricity storage relates to charging and discharging, if the energy storage subsystem end electric meter 21 is disconnected, the state of charge (SOC) of the energy storage subsystem 20 before the energy storage subsystem end electric meter 21 is disconnected can be compared with the state of charge of the energy storage subsystem 20 after the energy storage subsystem end electric meter 21 is recovered, the charging and discharging conditions of the energy storage subsystem 20 during the disconnection of the electric meter are determined, and therefore the metering data of the energy storage subsystem end electric meter 21 are updated.
As shown in fig. 3, taking the electric load end electric meter 41 as an example, the flow chart of electric quantity metering correction includes the following steps:
and S301, starting.
S302, an electric quantity information table L corresponding to the electric meter accessing the system is established in the GDC 50, where the electric quantity information table L includes daily normal operation time, daily increase of electric quantity, and accumulated electric quantity value, and stores corresponding data every 10 minutes, and the storage time interval (i.e., update period) may be set through the touch screen 60.
S303, the GDC 50 checks whether the electric load end electric meter 41 has a fault, if so, proceeds to S304, and if not, proceeds to S309. Specifically, the GDC 50 checks whether data from the electric meter is received, and determines that the electric meter is faulty if the data from the electric meter is not received for 20 seconds beyond a designated time point. And (4) removing the old electric meter to replace the new electric meter, wherein the GDC does not receive the data of the electric meter in the process, and the default is also a fault state.
And S304, the GDC 50 checks whether the microgrid system normally operates, if so, the step S305 is carried out, and if not, the step S313 is carried out. Specifically, whether each subsystem and the electric load equipment in the microgrid system report faults or not is checked, and if the faults report, the microgrid system is considered to be not normally operated.
And S305, the GDC 50 starts timing, inquires the normal operation time, the daily electric quantity increment value (data is not existed and recorded as 0) and the latest accumulated electric quantity value S1 of the microgrid system in the last three days in the electric quantity information table L corresponding to the electric meter, and calculates an average value T1 of the operation time and an average value S2 of the electric quantity increment.
S306, the GDC 50 judges whether the ammeter is normal or not, if so, the step goes to S307, and if not, the step goes to S308. For example, the GDC 50 receives the information uploaded by the electric meter, and then considers that the electric meter is normal.
S307, if the ammeter is recovered to be normal, the GDC 50 stops timing, the timing duration is T2, the accumulated electric quantity value of the ammeter in the updated electric quantity information table L is S1+ S2 multiplied by T2/T1, and the accumulated electric quantity data displayed by the touch screen 60 are changed accordingly; and sending the S value (equivalent to the accumulated electric quantity estimated value) to the electric meter as an initial value of the electric meter statistical electric quantity information, and accumulating the accumulated electric quantity value of the electric meter on the basis.
In practical application, after the ammeter recovers to be normal, the value S can be directly sent to the ammeter, or the operation returns to S303 to continuously judge whether the ammeter has a fault, at this time, since the ammeter just recovers to be normal and no fault exists, the operation will enter S309, and the measurement initial value of the ammeter after recovery is corrected by means of size comparison.
And S308, if the electric meter does not recover to be normal, the GDC 50 continues to count time and returns to the step S306 to continuously judge whether the electric meter recovers to be normal or not.
S309, if the electric meter does not have a fault, acquiring the current accumulated electric quantity value M of the electric meter, and inquiring the latest accumulated electric quantity value N of the electric meter in the electric quantity information table L.
S310, judging whether M is less than N, if yes, entering S311, and if not, entering S312.
S311, when M is less than N, the electric meter is in fault or replacement, the GDC 50 sends the N value to the electric meter to serve as an initial value of the subsequent accumulated electric quantity of the electric meter, and the electric quantity data of the electric meter is accumulated on the basis of the initial value.
And S312, if M is larger than N, updating the N value in the GDC electric quantity information table L to M.
And S313, ending.
In this embodiment, an electric quantity information table corresponding to the electric meter is established at the GDC terminal, the electric quantity information fed back by the electric meter is regularly inquired, the data fed back by the electric meter is compared with the data locally recorded by the GDC, if the data fed back by the electric meter is large, the value in the electric quantity information table at the GDC terminal is updated, and if the data fed back by the electric meter is small, the data locally recorded by the GDC is fed back to the corresponding electric meter, so that the electric quantity information counted by the electric meter is the latest data (namely, large data) forever. When the ammeter is disconnected, the normal operation time of the microgrid system from the disconnection of the ammeter to the recovery period of the ammeter is recorded, the electric quantity value increased during the disconnection of the ammeter is calculated according to the time and the electric quantity information corresponding to the ammeter in a period of time before the disconnection, then the value is summed with the accumulated electric quantity value before the failure of the ammeter, the obtained result is the measurement initial value after the recovery of the ammeter, and the accuracy of data display of the microgrid system is improved to a certain extent. Under the condition that unknown faults occur to the ammeter and the microgrid system still normally operates, the electric quantity data counted by the ammeter is actively corrected, errors of the statistical data of the ammeter are improved to a certain extent, the electric quantity information can still be normally accumulated after the ammeter is disconnected, the accuracy of data displayed by the microgrid system is improved, maintenance personnel are not needed to manually introduce the electric quantity information counted by the original ammeter during replacement of the new ammeter, and automatic updating of the metering initial value of the ammeter is achieved.
Based on the same inventive concept, the present embodiment provides an electricity amount correction apparatus, which can be used to implement the electricity amount correction method described in the above embodiments. The apparatus may be implemented by software and/or hardware, and the apparatus may be generally integrated in a GDC.
Fig. 4 is a block diagram of an electric quantity metering correction apparatus according to an embodiment of the present invention, and as shown in fig. 4, the apparatus includes:
the detection module 401 is configured to detect that an ammeter is disconnected;
a determining module 402, configured to determine an estimated value of power change during a power outage of an electric meter according to stored information and a system operating condition during the power outage of the electric meter, where the stored information is obtained by storing and periodically updating power information measured by each electric meter in a system;
and an updating module 403, configured to update the initial metering value of the electric meter according to the estimated electric quantity change value after the electric meter is online again.
Optionally, the determining module 402 includes:
the determining unit is used for determining the operation time length of the normal operation of the whole system during the offline period of the electric meter;
the first obtaining unit is used for obtaining the electric quantity information of the electric meter within the preset time before the electric meter is disconnected from the stored information and taking the electric quantity information as reference data;
and the first calculating unit is used for calculating the estimated value of the electric quantity change according to the reference data and the running time.
Optionally, the reference data includes: and the electricity meter is used for presetting the system normal operation time and the electricity quantity variable quantity in the time before the line is disconnected.
The first computing unit is specifically configured to: calculating the electric quantity variation of unit operation time in preset time before the disconnection according to the reference data; and calculating the product of the operation time length and the electric quantity variation of the unit operation time to obtain the electric quantity variation estimated value.
Optionally, the update module 403 includes:
the second obtaining unit is used for obtaining the accumulated electric quantity value before the electric meter is disconnected from the stored information;
the second calculating unit is used for calculating the sum of the accumulated electric quantity value before the electric meter is disconnected and the electric quantity change estimated value to obtain the accumulated electric quantity estimated value of the electric meter;
and the first updating unit is used for updating the electric quantity information corresponding to the electric meter in the stored information according to the accumulated electric quantity estimated value and sending the accumulated electric quantity estimated value to the electric meter to be used as a metering initial value of the electric meter.
Optionally, the detection module 401 is specifically configured to: and if the set time of the appointed time point is exceeded and the electric quantity information uploaded by the electric meter is not received, determining that the electric meter is disconnected.
Optionally, the apparatus further comprises: and the storage module is used for storing the electric quantity information measured by each electric meter in the system and periodically updating the electric quantity information. Specifically, the storage module includes:
a third obtaining unit, configured to, for each electric meter, obtain an actual metering value of accumulated electric quantity from the electric meter according to a preset period when the electric meter is not disconnected, and obtain a latest recorded value of the accumulated electric quantity of the electric meter from the stored information;
a comparison unit for comparing the actual metering value with the latest recorded value;
the second updating unit is used for updating the electric quantity information corresponding to the electric meter in the stored information if the actual metering value is larger than the latest recorded value;
and the sending unit is used for sending the latest recorded value to the electric meter to update the metering initial value of the electric meter if the actual metering value is smaller than the latest recorded value.
The device can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
An embodiment of the present invention further provides a microgrid system, including: a general data controller; at least one electric meter connected to the universal data controller; at least one device requiring metering of electricity; the general data controller includes the electricity amount correction device according to the above embodiment. The equipment needing to measure the electric quantity can be power generation equipment, a power grid, electric load equipment and the like. The electric meter is connected with the corresponding equipment.
An embodiment of the present invention further provides a computer device, including: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the method of the embodiment.
Embodiments of the present invention further provide a non-volatile computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method described in the above embodiments.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of fuel gauge correction, comprising:
detecting that the ammeter is disconnected;
determining an estimated value of electric quantity change during the offline period of the electric meter according to stored information and the system operation condition during the offline period of the electric meter, wherein the stored information is obtained by storing and periodically updating electric quantity information measured by each electric meter in the system;
and after the electric meter is on line again, updating the metering initial value of the electric meter according to the electric quantity change estimated value.
2. The method of claim 1, wherein determining an estimate of a change in power during a power meter outage based on the stored information and system operation during the power meter outage comprises:
determining the operation time length of the normal operation of the whole system during the offline period of the electric meter;
acquiring the electric quantity information of the ammeter in a preset time before the disconnection from the stored information as reference data;
and calculating to obtain the estimated value of the electric quantity change according to the reference data and the running time.
3. The method of claim 2, wherein the reference data comprises: the system normal operation time and the electric quantity variation of the electric meter within preset time before the electric meter is disconnected;
calculating to obtain the estimated value of the electric quantity change according to the reference data and the running time, wherein the step of calculating to obtain the estimated value of the electric quantity change comprises the following steps:
calculating the electric quantity variation of unit operation time in preset time before the disconnection according to the reference data;
and calculating the product of the operation time length and the electric quantity variation of the unit operation time to obtain the electric quantity variation estimated value.
4. The method of claim 1, wherein updating an initial value of the electricity meter based on the estimate of the change in charge comprises:
acquiring an accumulated electric quantity value before the electric meter is disconnected from the stored information;
calculating the sum of the accumulated electric quantity value before the electric meter is disconnected and the electric quantity change estimated value to obtain the accumulated electric quantity estimated value of the electric meter;
and updating the electric quantity information corresponding to the electric meter in the stored information according to the accumulated electric quantity estimated value, and sending the accumulated electric quantity estimated value to the electric meter to be used as a metering initial value of the electric meter.
5. The method of claim 1, wherein detecting that there is an electricity meter drop comprises:
and if the set time of the appointed time point is exceeded and the electric quantity information uploaded by the electric meter is not received, determining that the electric meter is disconnected.
6. The method according to any one of claims 1 to 5, wherein the periodically updating the information on the amount of electricity measured by each electricity meter in the system comprises:
for each electric meter, under the condition that the electric meter is not disconnected, acquiring an actual metering value of accumulated electric quantity from the electric meter according to a preset period, and acquiring a latest recorded value of the accumulated electric quantity of the electric meter from the stored information;
comparing said actual metered value to said most recently recorded value;
if the actual metering value is larger than the latest recorded value, updating electric quantity information corresponding to the electric meter in the stored information;
and if the actual metering value is smaller than the latest recorded value, sending the latest recorded value to the electric meter so as to update the metering initial value of the electric meter.
7. An electricity amount correction apparatus characterized by comprising:
the detection module is used for detecting that the ammeter is disconnected;
the system comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining the electric quantity change estimated value during the offline period of the electric meter according to stored information and the system operation condition during the offline period of the electric meter, and the stored information is obtained by storing and periodically updating the electric quantity information measured by each electric meter in the system;
and the updating module is used for updating the metering initial value of the electric meter according to the electric quantity change estimated value after the electric meter is on line again.
8. A microgrid system, comprising:
a general data controller;
at least one electric meter connected to the universal data controller;
at least one device requiring metering of electricity;
the universal data controller includes the electricity quantity correction apparatus of claim 7.
9. A computer device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 6 when executing the computer program.
10. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method of any of claims 1 to 6.
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