CN114636963A - Electric energy meter state on-line monitoring method and device, terminal and storage medium - Google Patents

Abstract

The invention relates to the technical field of electric power metering, and in particular to a method, device, terminal and storage medium for monitoring the state of an electric energy meter on the network. The method of the invention discloses a method for monitoring the state of an electric energy meter on the network. , the harmonics are obviously different from the current waveforms of the main line and the branch line. By opening the band-stop filter in each branch line, the harmonic current of the main line only passes through the band detection energy meter, and then passes through the state of the energy meter to be inspected. By comparing the data monitored by the network with the data of the general meter, it is possible to know whether the electric energy meter to be inspected meets the accuracy requirements. Therefore, after applying the method of the present invention, the electric energy meter can complete on-line detection without disassembling, saving equipment resources and manpower. It also guarantees the reliable operation and measurement accuracy of the electric energy meter.

Description

On-line monitoring method, device, terminal and storage medium for electric energy meter status

technical field

The invention relates to the technical field of electric power measurement, and in particular, to a method, device, terminal and storage medium for monitoring the state of an electric energy meter on the network.

Background technique

Electric energy meter is an instrument used to measure electric energy, also known as watt-hour meter, fire meter, kilowatt-hour meter, and refers to an instrument that measures various electrical quantities.

Electric energy meters should be verified regularly, and electric energy meters of some key nodes need to be rotated due to expiration, so as to avoid inaccurate measurement data after use and aging, causing losses to power supply companies or users.

In order to ensure the normal operation of the electric energy meter and avoid the waste of material and manpower due to "due rotation", it is very important for the selection of the operation and maintenance method of the electric power metering equipment. A good operation and maintenance strategy can reduce the waste of resources and promote the sustainable development of energy.

Based on this, it is necessary to develop and design an on-grid monitoring method for the status of electric energy meters.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide a method, device, terminal and storage medium for monitoring the status of an electric energy meter on the network, which are used to solve the problem that the use of expiration rotation in the prior art easily leads to waste of resources.

In a first aspect, an embodiment of the present invention provides an on-grid monitoring method for the status of an electric energy meter, including:

Select an electric energy meter to be checked from each electric energy meter, wherein the electric energy meter is an electric energy meter of a branch line, and the branch line is a line connected to the main line;

Turning on the band-stop filter of each of the electric energy meters except the electric energy meter to be checked, wherein the band-stop filter is used to prevent the harmonic current from flowing through the electric energy meter;

loading harmonics to the mains;

respectively acquiring the metering data of the total meter and the metering data of the electric energy meter to be checked, wherein the total meter is the electric energy meter of the main line, and the metering data includes the electricity consumption data of the same order as the harmonic;

Whether there is an abnormality in the electric energy meter to be inspected is determined according to the metering data of the general meter, the metering data of the electric energy meter to be inspected, and a preset condition.

In a possible implementation manner, the selecting the electric energy meter to be checked from each electric energy meter includes:

Obtain the identification of each electric energy meter;

Acquiring files of each of the electric energy meters according to each of the identifiers;

The electric energy meter to be checked is selected according to the file of each electric energy meter.

In a possible implementation manner, the harmonic frequency is a non-integer multiple of the mains voltage frequency, and the current of the harmonic varies randomly.

In a possible implementation manner, the separately acquiring the metering data of the total meter and the metering data of the electric energy meter to be inspected includes:

Obtain the current time, data collection start time and data collection duration;

Calibrate the clocks of the total meter and the electric energy meter to be checked according to the current time;

According to the data collection start time and the data collection duration, the metering data of the total meter and the metering data of the electric energy meter to be inspected are acquired respectively.

In a possible implementation manner, the measurement accuracy of the total meter and the measurement accuracy of the electric energy meter to be checked are obtained;

The preset condition is determined according to the measurement accuracy of the total meter and the measurement accuracy of the electric energy meter to be checked.

In a possible implementation manner, after determining whether the electric energy meter to be inspected is abnormal according to the metering data of the general meter and the metering data of the electric energy meter to be inspected, the method includes:

The metering data of the total meter and the metering data of the electric energy meter to be inspected are stored in the file of the electric energy meter to be inspected.

In the second aspect, an embodiment of the present invention provides an on-grid monitoring of the state of an electric energy meter, including:

A meter selection module to be inspected, used for selecting an electric energy meter to be inspected from each electric energy meter, wherein the electric energy meter is an electric energy meter of a branch line, and the branch line is a line connected to the main line;

a band-stop filter opening module, configured to turn on the band-stop filter of each of the electric energy meters except the electric energy meter to be checked, wherein the band-stop filter is used to prevent harmonic current from flowing through the electric energy meter;

a harmonic loading module for loading harmonics to the trunk line;

The data acquisition module is used to obtain the metering data of the total meter and the metering data of the electric energy meter to be inspected, wherein the total meter is the electric energy meter of the main line, and the metering data includes the harmonics of the same order. electrical data; and,

A conclusion module is used to determine whether the electric energy meter to be inspected is abnormal according to the measurement data of the total meter, the measurement data of the electric energy meter to be inspected, and a preset condition.

In a third aspect, embodiments of the present invention provide a terminal for monitoring the status of an electric energy meter on the network, including a memory, a processor, and a computer program stored in the memory and running on the processor, and the processor executes The computer program implements the steps of the method described in the first aspect or any of the possible implementations of the first aspect.

A fourth aspect includes the on-grid monitoring terminal for the status of the electric energy meter according to the third aspect, further comprising: a harmonic generator and a band-stop filter, the harmonic generator and the electric energy meter status on-grid monitoring terminal signal connect;

The harmonic generator is configured to load harmonic current to the trunk line according to the signal output from the network monitoring terminal of the state of the electric energy meter;

The band-stop filter is provided with: an input end, an output end and a control end, the input end is connected to the main line, the output end is used to connect the current input end of the electric energy meter, and the control end is used for The filtering of the current at the input terminal is started or stopped according to the on-off signal, and the power meter status monitoring terminal or the power meter outputs the on-off signal.

In a fifth aspect, embodiments of the present invention provide a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements the first aspect or any of the first aspect above. A possible implementation of the steps of the described method.

Compared with the prior art, the present invention has the following beneficial effects:

The embodiment of the present invention discloses an on-grid monitoring method for the state of an electric energy meter. By loading harmonics on the main line, the harmonics are obviously different from the current waveforms of the main line and branch lines, and by turning on the band resistance in each branch line filter, so that the harmonic current of the main line only passes through the electric energy meter with detection, and then through the comparison between the data of the electric energy meter to be inspected on the network and the data of the general meter, it can be known whether the electric energy meter to be inspected meets the accuracy requirements, so After the method of the invention is applied, the electric energy meter can complete the online detection without disassembling, which saves equipment resources and human resources, and also ensures the reliable operation and measurement accuracy of the electric energy meter.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present invention. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a flowchart of a method for monitoring the status of an electric energy meter on the network provided by an embodiment of the present invention;

2 is a functional block diagram of an on-grid monitoring device for the status of an electric energy meter provided by an embodiment of the present invention;

3 is a functional block diagram of a terminal for monitoring the status of an electric energy meter on the network provided by an embodiment of the present invention;

FIG. 4 is a functional block diagram of an on-grid monitoring system for the status of an electric energy meter provided by an embodiment of the present invention.

Detailed ways

In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and techniques are set forth in order to provide a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the following descriptions will be given through specific embodiments in conjunction with the accompanying drawings.

The embodiments of the present invention are described in detail below. This example is implemented on the premise of the technical solution of the present invention, and provides detailed implementation modes and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments. .

FIG. 1 is a flowchart of an on-grid monitoring method for an electric energy meter state provided by an embodiment of the present invention.

As shown in FIG. 1 , it shows the implementation flow chart of the method for monitoring the status of the electric energy meter on the network provided by the embodiment of the present invention, and the details are as follows:

In step 101, an electric energy meter to be checked is selected from each electric energy meter, wherein the electric energy meter is an electric energy meter of a branch line, and the branch line is a line connected to a main line.

In some embodiments, the step 101 includes:

Get the ID of each energy meter.

The files of each of the electric energy meters are acquired according to each of the identifiers.

The electric energy meter to be checked is selected according to the file of each electric energy meter.

Exemplarily, for each electric energy meter in the power supply line, it should be checked regularly, and the specified period is usually one year. By querying the electric energy meter files of each branch line in the power supply line, it is possible to know the electric energy meters that are in the temporary period, and the temporary electric energy meters are determined as the electric energy meters to be inspected.

In some cases, the line loss is abnormal. Generally speaking, the reason for the abnormal line loss is the measurement deviation of the electric energy meter of the branch line. The electric energy meter that has been repaired and replaced is used as the electric energy meter to be inspected. Therefore, it is supported by the file, which provides the necessary basis for quickly locating the faulty electric energy meter. .

In step 102, the band-stop filter of each of the electric energy meters except the electric energy meter to be checked is turned on, wherein the band-stop filter is used to prevent the harmonic current from flowing through the electric energy meter.

Exemplarily, the band-stop filter is adapted to the loaded harmonics. For example, if the frequency of the loaded harmonic is k, the corresponding band-stop filter can prevent the harmonics of frequency k from passing through, so that all harmonic currents pass through as Turn on the energy meter with the band-stop filter, that is, the energy meter to be checked.

In step 103, the mains are loaded with harmonics.

In some embodiments, the harmonic frequency is a non-integer multiple of the mains voltage frequency, and the current of the harmonic varies randomly.

Exemplarily, as we know, the fundamental of the current frequency of the mains is the voltage frequency, and the higher harmonics are integer multiples of the mains current frequency, so the loaded harmonics are significantly different from the currents of the mains and branch lines. , so that the loaded harmonics have obvious characteristics, and the band-stop filter can be filtered in a targeted manner, and for the data analysis system, the purpose of rapid identification can be achieved.

In step 104, the metering data of the total meter and the metering data of the electric energy meter to be checked are obtained respectively, wherein the total meter is the electric energy meter of the main line, and the metering data includes the power consumption of the same order as the harmonics data.

In some embodiments, step 104 includes:

Get the current time, data collection start time, and data collection duration.

The clocks of the total meter and the electric energy meter to be checked are calibrated according to the current time.

According to the data collection start time and the data collection duration, the metering data of the total meter and the metering data of the electric energy meter to be inspected are acquired respectively.

Exemplarily, for the total meter and the sub-meters, both are provided with a band-pass filter, and the harmonic signal of the same frequency as the loaded harmonic signal is obtained through the band-pass filter, and the voltage of the harmonic can be obtained by analyzing the signal, Harmonic current, harmonic active power, harmonic energy consumption in a period of time and other data, through the comparison of the above data, you can know whether the electric energy meter to be inspected meets the accuracy requirements.

In step 105, it is determined whether the electric energy meter to be inspected is abnormal according to the metering data of the general meter, the metering data of the electric energy meter to be inspected, and a preset condition.

In some possible implementations, in step 105, the metering accuracy of the total meter and the metering accuracy of the electric energy meter to be checked are acquired.

The preset condition is determined according to the measurement accuracy of the total meter and the measurement accuracy of the electric energy meter to be checked.

In some possible implementations, it also includes step 106:

The metering data of the total meter and the metering data of the electric energy meter to be inspected are stored in the file of the electric energy meter to be inspected.

In the embodiment of the on-grid monitoring method for the state of the electric energy meter of the present invention, the harmonics are loaded on the main line, and the harmonics are obviously different from the current waveforms of the main line and the branch line. By opening the band-stop filter in each branch line, the main line The harmonic current only passes through the electric energy meter with detection, and then through the comparison between the data of the electric energy meter to be inspected on the network and the data of the general meter, it can be known whether the electric energy meter to be inspected meets the accuracy requirements. Therefore, the method of the present invention is applied. After that, the electric energy meter can complete the online detection without disassembly, which saves equipment resources and human resources, and also ensures the reliable operation and measurement accuracy of the electric energy meter.

It should be understood that the size of the sequence numbers of the steps in the above embodiments does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

The following are device embodiments of the present invention, and for details that are not described in detail, reference may be made to the above-mentioned corresponding method embodiments.

FIG. 2 is a functional block diagram of an on-grid monitoring device for electric energy meter status provided by an embodiment of the present invention. Referring to FIG. 2 , an on-grid monitoring device for electric energy meter status 2 includes: a meter selection module to be inspected, a band-stop filter opening module, a harmonic loading module module, data acquisition module and conclusion module.

The meter selection module to be inspected is used to select the electric energy meter to be inspected from each electric energy meter, wherein the electric energy meter is an electric energy meter of a branch line, and the branch line is a line connected to the main line.

The band-stop filter turning-on module is configured to turn on the band-stop filter of each of the electric energy meters except the to-be-checked electric energy meter, wherein the band-stop filter is used to prevent the harmonic current from flowing through the electric energy meter.

A harmonic loading module for loading harmonics to the trunk line.

The data acquisition module is used to obtain the metering data of the total meter and the metering data of the electric energy meter to be inspected, wherein the total meter is the electric energy meter of the main line, and the metering data includes the harmonics of the same order. electrical data.

A conclusion module is used to determine whether the electric energy meter to be inspected is abnormal according to the measurement data of the total meter, the measurement data of the electric energy meter to be inspected, and a preset condition.

FIG. 3 is a functional block diagram of a terminal for monitoring the status of an electric energy meter on the network according to an embodiment of the present invention. As shown in FIG. 3 , the terminal 3 of this embodiment includes: a processor 300 , a memory 301 , and a computer program 302 stored in the memory 301 and executable on the processor 300 . When the processor 300 executes the computer program 302 , the steps in each of the above-mentioned methods and implementations for monitoring the status of electric energy meters on the grid are implemented, for example, steps 101 to 105 shown in FIG. 1 .

Exemplarily, the computer program 302 may be divided into one or more modules/units, and the one or more modules/units are stored in the memory 301 and executed by the processor 300 to complete the this invention.

The terminal 3 may be a computing device such as a desktop computer, a notebook, a handheld computer, and a cloud server. The terminal 3 may include, but is not limited to, a processor 300 and a memory 301 . Those skilled in the art can understand that FIG. 3 is only an example of the terminal 3, and does not constitute a limitation on the terminal 3. It may include more or less components than the one shown in the figure, or combine some components, or different components, such as The terminal may also include input and output devices, network access devices, buses, and the like.

The so-called processor 300 may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 301 may be an internal storage unit of the terminal 3 , such as a hard disk or a memory of the terminal 3 . The memory 301 may also be an external storage device of the terminal 3, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card equipped on the terminal 3, Flash card (FlashCard) and so on. Further, the memory 301 may also include both an internal storage unit of the terminal 3 and an external storage device. The memory 301 is used for storing the computer program and other programs and data required by the terminal. The memory 301 can also be used to temporarily store data that has been output or will be output.

Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated to different functional units, Module completion, that is, dividing the internal structure of the device into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the implementation manner may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. It can also be realized in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing from each other, and are not used to limit the protection scope of the present application. For the specific working process of the units and modules in the above-mentioned system, reference may be made to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described or described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

In the embodiments provided by the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other manners. For example, the device/terminal implementations described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other divisions, such as multiple units or Components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this implementation manner.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated modules/units, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the present invention can implement all or part of the processes in the methods of the above embodiments, and can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer When the program is executed by the processor, it can realize the steps of each of the above-mentioned methods for monitoring the state of the electric energy meter on the grid and the steps of the implementation manner of the device for monitoring the state of the electric energy meter on the grid. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form, and the like. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, removable hard disk, magnetic disk, optical disk, computer memory, Read-Only Memory (ROM) , Random Access Memory (Random Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable media may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer-readable media Excluded are electrical carrier signals and telecommunication signals.

FIG. 4 is a functional block diagram of an on-grid monitoring system for the status of an electric energy meter provided by an embodiment of the present invention.

Referring to FIG. 4 for detailed description, an on-grid monitoring system for the status of an electric energy meter includes the above-mentioned on-grid monitoring terminal 3 for the status of an electric energy meter, and further includes: a harmonic generator 401 and a band-stop filter 402 . The wave generator 401 is signal-connected to the on-grid monitoring terminal 3 for the status of the electric energy meter;

The harmonic generator 401 is configured to load a harmonic current to the main line according to the signal output by the on-grid monitoring terminal 3 of the state of the electric energy meter;

The band-stop filter 402 is provided with: an input end, an output end and a control end, the input end is connected to the main line, the output end is used to connect the current input end of the electric energy meter, and the control end is used for connecting the current input end of the electric energy meter. In order to start or stop the filtering of the current of the input terminal according to the on-off signal, the power meter status monitoring terminal 3 or the power meter outputs the on-off signal.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand that the above-mentioned embodiments can still be used for Modifications are made to the technical solutions recorded in the method, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should be included in the within the protection scope of the present invention.

Claims (10)

1. A method for monitoring the state of an electric energy meter on the network, comprising: Select an electric energy meter to be checked from each electric energy meter, wherein the electric energy meter is an electric energy meter of a branch line, and the branch line is a line connected to the main line; Turning on the band-stop filter of each of the electric energy meters except the electric energy meter to be checked, wherein the band-stop filter is used to prevent the harmonic current from flowing through the electric energy meter; loading harmonics to the mains; respectively acquiring the metering data of the total meter and the metering data of the electric energy meter to be checked, wherein the total meter is the electric energy meter of the main line, and the metering data includes the electricity consumption data of the same order as the harmonic; Whether there is an abnormality in the electric energy meter to be inspected is determined according to the metering data of the general meter, the metering data of the electric energy meter to be inspected, and a preset condition. 2. The method for monitoring the state of an electric energy meter on the network according to claim 1, wherein the selecting the electric energy meter to be checked from each electric energy meter comprises: Obtain the identification of each electric energy meter; Acquiring files of each of the electric energy meters according to each of the identifiers; The electric energy meter to be checked is selected according to the file of each electric energy meter. 3 . The on-grid monitoring method for the status of an electric energy meter according to claim 1 , wherein the harmonic frequency is a non-integer multiple of the mains voltage frequency, and the current of the harmonic varies randomly. 4 . 4 . The method for monitoring the status of an electric energy meter on the network according to claim 1 , wherein the separately acquiring the metering data of the total meter and the metering data of the electric energy meter to be inspected comprises: 5 . Obtain the current time, data collection start time and data collection duration; Calibrate the clocks of the total meter and the electric energy meter to be checked according to the current time; According to the data collection start time and the data collection duration, the metering data of the total meter and the metering data of the electric energy meter to be inspected are acquired respectively. 5. The method for monitoring the state of an electric energy meter on the network according to claim 1, wherein the method comprises: Obtain the measurement accuracy of the total meter and the measurement accuracy of the electric energy meter to be checked; The preset condition is determined according to the measurement accuracy of the total meter and the measurement accuracy of the electric energy meter to be checked. 6 . The on-grid monitoring method for the state of an electric energy meter according to any one of claims 1 to 5 , wherein, in said determining said After checking whether the electric energy meter is abnormal, including: The metering data of the total meter and the metering data of the electric energy meter to be inspected are stored in the file of the electric energy meter to be inspected. 7. An on-grid monitoring device for the state of an electric energy meter, comprising: A meter selection module to be inspected, used for selecting an electric energy meter to be inspected from each electric energy meter, wherein the electric energy meter is an electric energy meter of a branch line, and the branch line is a line connected to the main line; a band-stop filter opening module, configured to turn on the band-stop filter of each of the electric energy meters except the electric energy meter to be checked, wherein the band-stop filter is used to prevent harmonic current from flowing through the electric energy meter; a harmonic loading module for loading harmonics to the trunk line; The data acquisition module is used to obtain the metering data of the total meter and the metering data of the electric energy meter to be inspected, wherein the total meter is the electric energy meter of the main line, and the metering data includes the harmonics of the same order. electrical data; and, A conclusion module is used to determine whether there is an abnormality in the electric energy meter to be inspected according to the metering data of the general meter, the metering data of the electric energy meter to be inspected, and a preset condition. 8. A terminal for monitoring the state of an electric energy meter on the network, comprising a memory, a processor and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program while implementing the steps of the method as claimed in any one of claims 1 to 6 above. 9 . An on-grid monitoring system for the status of an electric energy meter, characterized in that it comprises the electric energy meter status on-grid monitoring terminal as claimed in claim 8 , further comprising: a harmonic generator and a band-stop filter, the harmonic generation The power meter is connected to the network monitoring terminal for the status of the electric energy meter; The harmonic generator is configured to load harmonic current to the main line according to the signal output from the network monitoring terminal of the state of the electric energy meter; The band-stop filter is provided with: an input end, an output end and a control end, the input end is connected with the main line, the output end is used for connecting the current input end of the electric energy meter, and the control end is used for connecting the current input end of the electric energy meter. The filtering of the current of the input terminal is started or stopped according to the switching signal, and the state monitoring terminal of the electric energy meter or the electric energy meter outputs the opening and closing signal. 10. A computer-readable storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, the method according to any one of the preceding claims 1 to 6 is implemented A step of.

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