Testing Method, Device, Medium, and Terminal for the Accuracy of the Metering Results of an Electric Energy Meter

Abstract

The present application discloses a method and device, medium, and terminal for testing the accuracy of the metering result of an electric energy meter, relating to the technical field of electric energy metering. The main purpose is to improve the technical problem that the existing method for testing the accuracy of the metering result of an electric energy meter under dynamic signals is single in form, resulting in the inability to meet the actual testing requirements. It includes: obtaining a dynamic current test signal group, which is composed of a first dynamic current test signal and a second dynamic current test signal, and the first dynamic current test signal and the second dynamic current test signal are obtained by splitting a steady-state current test signal; respectively measuring the electric energy data under various current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal based on the target electric energy meter; generating a test result for the accuracy of the metering result of the target electric energy meter according to the electric energy data under various current test signals.

Description

Technical Field

[0001] The present application relates to the technical field of electric energy metering, and particularly to a method, device, medium, and terminal for testing the accuracy of the metering result of an electric energy meter. Background Art

[0002] As an instrument for measuring electric energy, the electric energy meter plays an extremely important role in the power system. Therefore, ensuring the accuracy of its metering result is particularly important. The traditional test for the accuracy of the metering result of the electric energy meter is usually completed based on a steady-state test signal. Therefore, the obtained test technical indicators are essentially steady-state indicators, and it cannot be guaranteed that the electric energy meter can still maintain accurate metering under dynamic signals. However, in new power grids such as new power sources or modern power electronic loads, the line power that is constantly in a dynamic change state is the norm. Therefore, ensuring that the electric energy meter can still maintain accurate metering under dynamic signals is the top priority.

[0003] Currently, although in the newly revised national standards of GB / T 17215.211 and GB / T 17215.321, relevant content for testing the accuracy of the metering result of the electric energy meter under dynamic test signals has been added. However, due to the single form of the existing test methods for the accuracy of the metering result of the electric energy meter under dynamic signals, it still cannot meet the actual test needs. Summary of the Invention

[0004] In view of this, the present application provides a method, system, device, medium, and terminal for testing the accuracy of the metering result of an electric energy meter, mainly aiming to improve the technical problem that the existing single-form test method for the accuracy of the metering result of the electric energy meter under dynamic signals still cannot meet the actual test needs.

[0005] According to one aspect of the present application, a method for testing the accuracy of the metering result of an electric energy meter is provided, including:

[0006] Obtaining a group of dynamic current test signals, the group of dynamic current test signals being composed of a first dynamic current test signal and a second dynamic current test signal, and the first dynamic current test signal and the second dynamic current test signal being obtained by splitting a steady-state current test signal;

[0007] Based on the target electric energy meter, respectively measuring the electric energy data under a variety of current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal;

[0008] Generating a test result for the accuracy of the metering result of the target electric energy meter according to the electric energy data under the variety of current test signals.

[0009] Preferably, the target watt-hour meter separately measures the watt-hour data under various current inspection signals generated by the first dynamic current inspection signal, the second dynamic current inspection signal, and the steady-state current inspection signal, specifically including:

[0010] Within a first preset time period, based on the target watt-hour meter, separately measure the first watt-hour data generated by the first dynamic current inspection signal, the second watt-hour data generated by the second dynamic current inspection signal, and the third watt-hour data generated by the steady-state current inspection signal;

[0011] In the first half of a second preset time period, based on the target watt-hour meter, measure the fourth watt-hour data generated by the first dynamic current inspection signal, and in the second half of the second preset time period, based on the target watt-hour meter, measure the fifth watt-hour data generated by the second dynamic current inspection signal. The second preset time period is twice the first preset time period;

[0012] Sum the fourth watt-hour data and the fifth watt-hour data to generate the sixth watt-hour data.

[0013] Preferably, generating an inspection result for the accuracy of the measurement result of the target watt-hour meter according to the watt-hour data under the various current inspection signals specifically includes:

[0014] If the sum of the first watt-hour data and the second watt-hour data is equal to the third watt-hour data and the sixth watt-hour data, the inspection result for the accuracy of the measurement result of the target watt-hour meter is accurate;

[0015] Otherwise, the inspection result for the accuracy of the measurement result of the target watt-hour meter is inaccurate, and an alarm message indicating that the inspection fails is output.

[0016] Preferably, the dynamic current signal period parameter of the first dynamic current inspection signal is equal to the dynamic current signal period parameter of the second dynamic current inspection signal.

[0017] Preferably, before separately measuring, within the first preset time period, based on the target watt-hour meter, the first watt-hour data generated by the first dynamic current inspection signal, the second watt-hour data generated by the second dynamic current inspection signal, and the third watt-hour data generated by the steady-state current inspection signal, the method further includes:

[0018] Obtain the dynamic current signal period parameter and the power frequency current signal period parameter of the steady-state current inspection signal;

[0019] Use the least common multiple of the dynamic current signal period parameter and the power frequency current signal period parameter as the first preset time period.

[0020] Preferably, before the target watt-hour meter measures the electric energy data under multiple current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal respectively, the method further includes:

[0021] Based on the target watt-hour meter and a preset standard watt-hour meter, perform metering operations on the steady-state current test signal respectively;

[0022] If the difference between the metering result of the target watt-hour meter and the metering result of the standard watt-hour meter is greater than a preset error threshold, terminate the test thread of the target watt-hour meter and output an alarm message indicating that the test fails.

[0023] According to another aspect of the present application, there is provided a device for testing the accuracy of the metering result of a watt-hour meter, including:

[0024] An acquisition module, configured to acquire a dynamic current test signal group, where the dynamic current test signal group is composed of a first dynamic current test signal and a second dynamic current test signal, and the first dynamic current test signal and the second dynamic current test signal are obtained by splitting a steady-state current test signal;

[0025] A metering module, configured to measure the electric energy data under multiple current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal respectively based on the target watt-hour meter;

[0026] A generation module, configured to generate a test result for the accuracy of the metering result of the target watt-hour meter according to the electric energy data under the multiple current test signals.

[0027] Preferably, the metering module specifically includes:

[0028] A first metering unit, configured to measure the first electric energy data generated by the first dynamic current test signal, the second electric energy data generated by the second dynamic current test signal, and the third electric energy data generated by the steady-state current test signal respectively based on the target watt-hour meter within a first preset time period;

[0029] A second metering unit, configured to measure the fourth electric energy data generated by the first dynamic current test signal based on the target watt-hour meter in the first half of a second preset time period, and measure the fifth electric energy data generated by the second dynamic current test signal based on the target watt-hour meter in the second half of the second preset time period, where the second preset time period is twice the first preset time period;

[0030] An addition unit for adding the fourth power data and the fifth power data to generate sixth power data.

[0031] Preferably, the generating module is specifically configured to:

[0032] If the sum of the first power data and the second power data is equal to the third power data and the sixth power data, the test result of the accuracy of the target electricity meter measurement result is accurate;

[0033] Otherwise, the test result of the accuracy of the target electricity meter measurement result is inaccurate, and an alarm message indicating that the test fails is output.

[0034] Preferably, the dynamic current signal period parameter of the first dynamic current test signal is equal to the dynamic current signal period parameter of the second dynamic current test signal.

[0035] Preferably, before the first metering unit, the module further includes:

[0036] An acquisition unit for acquiring the dynamic current signal period parameter and the power frequency current signal period parameter of the steady-state current test signal;

[0037] A determination unit for using the least common multiple of the dynamic current signal period parameter and the power frequency current signal period parameter as the first preset duration.

[0038] Preferably, before the metering module, the device further includes:

[0039] A pre-test module for respectively performing metering operations on the steady-state current test signal based on the target electricity meter and a preset standard electricity meter;

[0040] The pre-test module is further configured to terminate the test thread of the target electricity meter and output an alarm message indicating that the test fails if the difference between the measurement result of the target electricity meter and the measurement result of the standard electricity meter is greater than a preset error threshold.

[0041] According to another aspect of the present application, a storage medium is provided, in which at least one executable instruction is stored, and the executable instruction causes a processor to perform operations corresponding to the above data query method.

[0042] According to still another aspect of the present application, a terminal is provided, including: a processor, a memory, a communication interface, and a communication bus, and the processor, the memory, and the communication interface complete communication with each other through the communication bus;

[0043] The memory is used to store at least one executable instruction, and the executable instruction causes the processor to perform operations corresponding to the above data query method.

[0044] By means of the above technical solution, the technical solution provided by the embodiment of the present application has at least the following advantages:

[0045] The present application provides a method, a device, a medium, and a terminal for verifying the accuracy of the measurement result of an electric energy meter. First, a dynamic current test signal group is obtained. The dynamic current test signal group is composed of a first dynamic current test signal and a second dynamic current test signal, and the first dynamic current test signal and the second dynamic current test signal are obtained by splitting a steady-state current test signal. Secondly, based on the target electric energy meter, electric energy data under a variety of current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal are respectively measured. Finally, according to the electric energy data under the variety of current test signals, a test result for the accuracy of the measurement result of the target electric energy meter is generated. Compared with the prior art, in the embodiment of the present application, by measuring the electric energy data generated by a variety of current test signals based on the target electric energy meter respectively, and generating a test result for the accuracy of the measurement result of the target electric energy meter according to the measurement result, since the variety of current test signals include but are not limited to dynamic current test signals with a fixed on-off ratio, dynamic current test signals with a random on-off ratio, and continuous dynamic current test signals, etc., the technical problem that the actual test requirements cannot be met due to the single form of the test method is effectively overcome.

[0046] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following specific embodiments of the present application are specifically exemplified. Description of the Drawings

[0047] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0048] Figure 1 A flowchart of a method for verifying the accuracy of the measurement result of an electric energy meter provided by an embodiment of the present application is shown;

[0049] Figure 2 A flowchart of another method for verifying the accuracy of the measurement result of an electric energy meter provided by an embodiment of the present application is shown;

[0050] Figure 3Shows the waveform diagram of the on-off type dynamic current inspection signal provided by the embodiment of the present application;

[0051] Figure 4 Shows the waveform diagram of the continuous type dynamic current inspection signal provided by the embodiment of the present application;

[0052] Figure 5 Shows the schematic diagram of the inspection system provided by the embodiment of the present application;

[0053] Figure 6 Shows the block diagram of the composition of the inspection device for the accuracy of the metering result of an electric energy meter provided by the embodiment of the present application;

[0054] Figure 7 Shows the schematic diagram of the structure of a terminal provided by the embodiment of the present application. Detailed implementation manners

[0055] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0056] Meanwhile, it should be understood that, for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship.

[0057] The following description of at least one exemplary embodiment is merely illustrative and in no way restrictive of the present application and its application or use.

[0058] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0059] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0060] Embodiments of the present application can be applied to a computer system / server, which can operate together with many other general-purpose or special-purpose computing system environments or configurations. Examples of well-known computing systems, environments, and / or configurations suitable for use with a computer system / server include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, minicomputer systems, mainframe computer systems, and distributed cloud computing technology environments including any of the above systems, and so on.

[0061] The computer system / server can be described in the general context of computer system-executable instructions, such as program modules, executed by a computer system. Generally, program modules can include routines, programs, target programs, components, logic, data structures, and so on, which perform specific tasks or implement specific abstract data types. The computer system / server can be implemented in a distributed cloud computing environment where tasks are executed by remote processing devices linked through a communication network. In a distributed cloud computing environment, program modules can be located on local or remote computing system storage media including storage devices.

[0062] Embodiments of the present application provide a method for verifying the accuracy of the measurement results of an electric energy meter, as Figure 1 shown, the method includes:

[0063] 101. Obtain a dynamic current test signal group.

[0064] Among them, the dynamic current test signal group consists of a first dynamic current test signal and a second dynamic current test signal; the first dynamic current test signal and the second dynamic current test signal are obtained by splitting the steady-state current test signal; the dynamic current signal period parameters of the first dynamic current test signal are equal to those of the second dynamic current test signal. In the embodiment of the present application, the current execution end may be the inspection control unit of the electric energy meter production line. During the inspection, the voltage test signal is a steady-state power frequency signal, that is, the effective value and frequency of the voltage test signal are stable and unchanged, and it is a standard power frequency sine wave; the current test signal can be configured as a dynamic current test signal and a steady-state current test signal according to actual inspection requirements. Among them, for the dynamic current test signal, that is, the effective value or frequency of the current test signal is variable, including but not limited to dynamic current test signals with a fixed on-off ratio, dynamic current test signals with a random on-off ratio, and continuous dynamic current test signals, etc. Specifically, the dynamic characteristics to be tested can be determined according to actual inspection requirements, and the corresponding dynamic current test signal can be compiled. Among them, the dynamic current test signal is a dynamic current test signal group composed of a first dynamic current test signal and a second dynamic current test signal, and the first dynamic current test signal and the second dynamic current test signal are the same as the steady-state current test signal after being superimposed.

[0065] 102. Based on the target electric energy meter, respectively measure the electric energy data under various current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal.

[0066] Among them, the target electric energy meter is used to represent the electric energy meter to be inspected currently. In the embodiment of the present application, various current test signals such as a first dynamic current test signal, a second dynamic current test signal, and a steady-state current test signal are respectively applied to the circuit, and the target electric energy meter is used to measure the electric energy data for corresponding durations respectively.

[0067] It should be noted that during the measurement operation, the same current loop must be used to avoid systematic errors introduced by loop differences.

[0068] 103. Generate an inspection result for the measurement result accuracy of the target electric energy meter according to the electric energy data under various current test signals.

[0069] It should be noted that since the current inspection signal is a periodic signal, and the first dynamic current inspection signal and the second dynamic current inspection signal are obtained by splitting the steady-state current inspection signal, therefore, within the same time duration, the sum of the electrical energy data generated by the first dynamic current inspection signal and the electrical energy data generated by the second dynamic current inspection signal should theoretically be equal to the electrical energy data generated by the steady-state current inspection signal. Based on this, this can be used as a basis for verifying the accuracy of the measurement result of the target watt-hour meter. In addition, the electrical energy data generated by the first dynamic current inspection signal is measured in the first half of a time duration, and the electrical energy data generated by the second dynamic current inspection signal is measured in the second half of this time duration, and then the two pieces of electrical energy data are added up, which should be equal to the electrical energy data generated by the steady-state current inspection signal within half of this time duration. Similarly, this can also be used as another basis for verifying the accuracy of the measurement result of the target watt-hour meter, and no specific limitation is made in the embodiments of the present application.

[0070] Compared with the prior art, in the embodiments of the present application, by respectively measuring the electrical energy data generated by multiple current inspection signals based on the target watt-hour meter, and generating an inspection result of the accuracy of the measurement result of the target watt-hour meter according to the measurement result. Since the multiple current inspection signals include, but are not limited to, dynamic current inspection signals with a fixed on-off ratio, dynamic current inspection signals with a random on-off ratio, and continuous dynamic current inspection signals, etc., it effectively overcomes the technical problem that the single form of the inspection method cannot meet the actual inspection needs.

[0071] The embodiments of the present application provide another method for verifying the accuracy of the measurement result of a watt-hour meter, as Figure 2 shown, this method includes:

[0072] 201. Obtain a group of dynamic current inspection signals.

[0073] Among them, the dynamic current signal period parameter of the first dynamic current inspection signal is equal to the dynamic current signal period parameter of the second dynamic current inspection signal. In the embodiments of the present application, specifically, first, determine the dynamic characteristics to be tested according to the actual inspection requirements, and compile the first dynamic current inspection signal, then the paired second dynamic current inspection signal can be automatically determined. For example, taking the on-off type dynamic current inspection signal as an example, when the on-off ratio of the on-site working conditions is X:Y, then the first dynamic current inspection signal is compiled to be on for X time and off for Y time, and the corresponding second dynamic current signal must be off for X time and on for Y time. Exemplarily, taking the continuous dynamic current inspection signal as an example, the first dynamic current inspection signal can be compiled as: Then, the second dynamic current inspection signal corresponding to the first dynamic current inspection signal can be expressed as: The steady-state current test signal obtained by superimposing the first dynamic current test signal and the second dynamic current test signal can be expressed as: where \(w_0\) represents the frequencies of the first dynamic current test signal and the second dynamic current test signal, and \(w_1\) represents the power frequency current signal frequency of the steady-state current test signal. \(\varphi_0\) represents the initial phases of the first dynamic current test signal and the second dynamic current test signal. \(\varphi_1\) represents the initial phase of the power frequency current signal of the steady-state current test signal. The voltage signal is always a steady-state signal and can be expressed as: where \(w_1\) represents the power frequency voltage signal frequency of the steady-state current test signal. \(\varphi_1\) represents the initial phase of the power frequency voltage signal of the steady-state current test signal. The waveform diagrams of the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal are as shown in Figure 3 and Figure 4 where Figure 3 represents the waveform diagram of the on-off type dynamic current test signal, Figure 4 represents the waveform diagram of the continuous type dynamic current test signal.

[0074] 202. Pre-inspect the target electricity meter.

[0075] In the embodiment of the present application, a pre-tested and qualified standard electricity meter is preset, arranged in the same metering environment as the target electricity meter, and the steady-state current test signal is measured simultaneously with the target electricity meter as reference data. If the difference between the measurement result of the target electricity meter and the measurement result of the standard electricity meter is greater than the preset error threshold, it means that the measurement result accuracy of the target electricity meter under the steady-state current test signal fails, and the steady-state metering accuracy fails. At this time, it is not necessary to further test whether the measurement result under the dynamic current test signal is accurate, and it can be directly determined that the measurement result accuracy of the target electricity meter fails. Only when the measurement result accuracy of the target electricity meter under the steady-state current test signal passes, the subsequent test on the measurement result accuracy under the dynamic current test signal is continued, and no standard electricity meter is required as a reference in the subsequent process. In addition, when the test is unqualified, an alarm message indicating that the test fails can be output to prompt manual intervention.

[0076] Correspondingly, step 202 of the embodiment specifically includes: respectively performing a metering operation on the steady-state current test signal based on the target electricity meter and the preset standard electricity meter; if the difference between the measurement result of the target electricity meter and the measurement result of the standard electricity meter is greater than the preset error threshold, terminate the test thread of the target electricity meter and output an alarm message indicating that the test fails.

[0077] 203. Determine the first preset duration.

[0078] In the embodiment of the present application, first, the common period parameter of the power frequency current signal period parameter and the dynamic current signal period parameter of the steady-state current test signal is calculated, that is, the least common multiple of the two period parameters. For example, if the power frequency current signal period parameter is 20 ms and the dynamic current signal period parameter is 200 ms, then the common period parameter (that is, the least common multiple time) is 200 ms; further, according to the dynamic current signal and the minimum resolution of the target watt-hour meter for electric energy, it is specifically determined how many times the common period parameter (that is, the common multiple of the dynamic current signal period parameter and the power frequency current signal period parameter) is used as the first preset duration. Specifically, the total measurement duration can be adjusted by a multiple. The larger the multiple, the longer the measurement time and the greater the accumulated electric energy. The multiple can be determined according to determined, where U represents the effective value of the steady-state voltage signal, the unit is volt V, I represents the effective value of the steady-state current signal, the unit is ampere A, T represents time, the unit is second s, and a represents the number of decimal places of the electric energy indication value of the watt-hour meter. It should be noted that the minimum resolution of the watt-hour meter, that is, the number of decimal places of the electric energy measured by the watt-hour meter, is usually two decimal places at present, that is, the minimum resolution is 0.01 kWh, that is, 0.01 degree of electricity.

[0079] Correspondingly, step 203 of the embodiment specifically includes: obtaining the dynamic current signal period parameter and the power frequency current signal period parameter of the steady-state current verification signal; using the common multiple of the dynamic current signal period parameter and the power frequency current signal period parameter as the first preset duration.

[0080] 204. Based on the target watt-hour meter, respectively measure the electric energy data under multiple current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal.

[0081] In the embodiment of the present application, within the first preset duration (that is, the duration of n times the common period parameter), use the target watt-hour meter to respectively measure the first electric energy data E generated by the first dynamic current test signal A , the second electric energy data E generated by the second dynamic current test signal B and the third electric energy data E generated by the steady-state current test signal C ; within the second preset duration (that is, the duration of 2n times the common period parameter), within the first n times the common period parameter duration, use the target watt-hour meter to measure the fourth electric energy data generated by the first dynamic current test signal, and within the latter n times the common period parameter duration, use the target watt-hour meter to measure the fifth electric energy data generated by the second dynamic current test signal, and add them up to obtain the sixth electric energy data E AB .

[0082] Correspondingly, step 204 of the embodiment specifically includes: within the first preset duration, respectively measuring, based on the target electricity meter, the first electrical energy data generated by the first dynamic current test signal, the second electrical energy data generated by the second dynamic current test signal, and the third electrical energy data generated by the steady-state current test signal; within the first half of the second preset duration, measuring, based on the target electricity meter, the fourth electrical energy data generated by the first dynamic current test signal, and within the second half of the second preset duration, measuring, based on the target electricity meter, the fifth electrical energy data generated by the second dynamic current test signal, where the second preset duration is twice the first preset duration; adding the fourth electrical energy data and the fifth electrical energy data for processing to generate the sixth electrical energy data.

[0083] 205. Generate a test result for the accuracy of the measurement result of the target electricity meter according to the electrical energy data under multiple current test signals.

[0084] In the embodiment of the present application, if E A +E B =E AB =E C , it indicates that the test result for the accuracy of the measurement result of the target electricity meter is accurate; otherwise, it is inaccurate.

[0085] Correspondingly, step 205 of the embodiment specifically includes: if the sum of the first electrical energy data and the second electrical energy data is equal to the third electrical energy data and the sixth electrical energy data, the test result for the accuracy of the measurement result of the target electricity meter is accurate; otherwise, the test result for the accuracy of the measurement result of the target electricity meter is inaccurate, and an alarm message indicating a failed test is output.

[0086] In a specific application scenario, a test system for the accuracy of the measurement result of an electricity meter, such as Figure 5As shown in the figure, it includes: a PC, a standard power source, a control unit, a standard watt-hour meter, and an error calculation unit. Among them, the PC is used to extract the characteristics of the actual on-site dynamic waveform, analyze its amplitude transformation, repetition period and other change characteristics, determine the waveform characteristics of the dynamic current test signal, and then compile a dynamic current test signal with the same characteristics and send it to the control unit. The control unit is used to control the standard power source to output current signals and voltage signals according to the instructions sent by the PC, where the voltage signal is a steady-state signal, and the current signal outputs a dynamic current signal or a steady-state current signal according to the test requirements. The standard watt-hour meter is in the same metering environment as the target watt-hour meter, measures the electrical energy of the same voltage and current, and uses the electrical energy value measured by the standard watt-hour meter as the reference value. When measuring the steady-state current signal, the electrical energy 1 measured by the standard watt-hour meter is used as the reference value, and the electrical energy 2 measured by the target watt-hour meter is used as the measured value. When the deviation between the electrical energy 2 and the electrical energy 1 is greater than the error limit requirement, the steady-state metering accuracy of the target watt-hour meter is unqualified. At this time, the subsequent dynamic metering accuracy test does not need to be carried out, and it is directly determined that the metering accuracy of the target watt-hour meter is unqualified. When the steady-state metering accuracy of the target watt-hour meter is qualified, the subsequent dynamic metering accuracy test is carried out, and the standard watt-hour meter is not required as a reference subsequently. The error calculation unit is used to obtain the electrical energy information of the target watt-hour meter and the standard watt-hour meter, and calculate the error of the target watt-hour meter according to the obtained electrical energy information. When performing the dynamic metering accuracy test, the dynamic metering error of the target watt-hour meter can be calculated by simply obtaining the electrical energy information of the target watt-hour meter multiple times. For example, after each test, the accumulated electrical energy E A 、E B 、E AB 、E C of the target watt-hour meter is obtained, and then it is judged whether E A +E B 、E AB 、E C are consistent.

[0087] It should be noted that when the target watt-hour meter is a single-phase watt-hour meter, the standard power source outputs a single-loop current and a single-phase voltage, and the standard watt-hour meter and the target watt-hour meter measure single-phase electrical energy. When the target watt-hour meter is a three-phase watt-hour meter, the standard power source outputs three-loop currents and three-phase voltages, and the standard watt-hour meter and the target watt-hour meter measure three-phase electrical energy.

[0088] The present application provides a method for testing the accuracy of the metering result of an electric energy meter. First, a dynamic current test signal group is obtained. The dynamic current test signal group is composed of a first dynamic current test signal and a second dynamic current test signal. The first dynamic current test signal and the second dynamic current test signal are obtained by splitting a steady-state current test signal. Secondly, based on the target electric energy meter, the electric energy data under various current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal are respectively measured. Finally, according to the electric energy data under the various current test signals, a test result for the accuracy of the metering result of the target electric energy meter is generated. Compared with the prior art, in the embodiment of the present application, by measuring the electric energy data generated by various current test signals based on the target electric energy meter and generating a test result for the accuracy of the metering result of the target electric energy meter according to the measurement result, since the various current test signals include, but are not limited to, dynamic current test signals with a fixed on-off ratio, dynamic current test signals with a random on-off ratio, and continuous dynamic current test signals, etc., the technical problem that the actual test needs cannot be met due to the single form of the test method is effectively overcome.

[0089] Further, as an implementation of the method shown above Figure 1 the embodiment of the present application provides a device for testing the accuracy of the metering result of an electric energy meter, as Figure 6 shown. The device includes:

[0090] An acquisition module 31, a metering module 32, and a generation module 33.

[0091] The acquisition module 31 is used to acquire a dynamic current test signal group. The dynamic current test signal group is composed of a first dynamic current test signal and a second dynamic current test signal. The first dynamic current test signal and the second dynamic current test signal are obtained by splitting a steady-state current test signal.

[0092] The metering module 32 is used to respectively measure the electric energy data under various current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal based on the target electric energy meter.

[0093] The generation module 33 is used to generate a test result for the accuracy of the metering result of the target electric energy meter according to the electric energy data under the various current test signals.

[0094] In a specific application scenario, the metering module specifically includes:

[0095] A first metering unit, configured to, within a first preset time period, respectively meter first power data generated by the first dynamic current test signal, second power data generated by the second dynamic current test signal, and third power data generated by the steady-state current test signal based on the target electricity meter;

[0096] A second metering unit, configured to, in the first half of a second preset time period, meter fourth power data generated by the first dynamic current test signal based on the target electricity meter, and in the second half of the second preset time period, meter fifth power data generated by the second dynamic current test signal based on the target electricity meter, where the second preset time period is twice the first preset time period;

[0097] An adding unit, configured to perform an adding process on the fourth power data and the fifth power data to generate sixth power data.

[0098] In a specific application scenario, the generating module is specifically configured to:

[0099] If the sum of the first power data and the second power data is equal to the third power data and the sixth power data, the test result of the accuracy of the metering result of the target electricity meter is accurate;

[0100] Otherwise, the test result of the accuracy of the metering result of the target electricity meter is inaccurate, and an alarm message indicating a failed test is output.

[0101] In a specific application scenario, the dynamic current signal period parameter of the first dynamic current test signal is equal to the dynamic current signal period parameter of the second dynamic current test signal.

[0102] In a specific application scenario, before the first metering unit, the module further includes:

[0103] An obtaining unit, configured to obtain the dynamic current signal period parameter and the power frequency current signal period parameter of the steady-state current test signal;

[0104] A determining unit, configured to use the least common multiple of the dynamic current signal period parameter and the power frequency current signal period parameter as the first preset time period.

[0105] In a specific application scenario, before the metering module, the device further includes:

[0106] A pre-test module, configured to respectively perform metering operations on the steady-state current test signal based on the target electricity meter and a preset standard electricity meter;

[0107] The pre-inspection module is further configured to terminate the inspection thread of the target watt-hour meter and output an alarm message indicating that the inspection fails if the difference between the measurement result of the target watt-hour meter and the measurement result of the standard watt-hour meter is greater than a preset error threshold.

[0108] The present application provides a device for inspecting the accuracy of the measurement result of a watt-hour meter. First, a dynamic current inspection signal group is obtained. The dynamic current inspection signal group is composed of a first dynamic current inspection signal and a second dynamic current inspection signal, and the first dynamic current inspection signal and the second dynamic current inspection signal are obtained by splitting a steady-state current inspection signal. Secondly, based on the target watt-hour meter, the electrical energy data under various current inspection signals generated by the first dynamic current inspection signal, the second dynamic current inspection signal, and the steady-state current inspection signal are respectively measured. Finally, according to the electrical energy data under the various current inspection signals, an inspection result for the accuracy of the measurement result of the target watt-hour meter is generated. Compared with the prior art, in the embodiment of the present application, by measuring the electrical energy data generated by various current inspection signals based on the target watt-hour meter and generating an inspection result for the accuracy of the measurement result of the target watt-hour meter according to the measurement results, since the various current inspection signals include, but are not limited to, dynamic current inspection signals with a fixed on-off ratio, dynamic current inspection signals with a random on-off ratio, and continuous dynamic current inspection signals, etc., the technical problem that the actual inspection needs cannot be met due to the single form of the inspection method is effectively overcome.

[0109] According to an embodiment of the present application, a storage medium is provided. The storage medium stores at least one executable instruction, and the computer executable instruction can execute the access test method of the interface in any of the above method embodiments.

[0110] Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product. The software product can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various implementation scenarios of the present application.

[0111] Figure 7 The structural schematic diagram of a terminal provided according to an embodiment of the present application is shown. The specific implementation of the terminal is not limited in the specific embodiment of the present application.

[0112] As Figure 7 shown, the computer device may include: a processor 402, a communication interface 404, a memory 406, and a communication bus 408.

[0113] Among them: The processor 402, the communication interface 404, and the memory 406 communicate with each other through the communication bus 408.

[0114] The communication interface 404 is used to communicate with network elements of other devices such as clients or other servers.

[0115] The processor 402 is used to execute the program 410, and specifically can execute the relevant steps in the above embodiments of the method for verifying the accuracy of the electricity meter measurement result.

[0116] Specifically, the program 410 may include program code, and the program code includes computer operation instructions.

[0117] The processor 402 may be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application. One or more processors included in the computer device may be of the same type of processor, such as one or more CPUs; or may be of different types of processors, such as one or more CPUs and one or more ASICs.

[0118] The memory 406 is used to store the program 410. The memory 406 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk memory.

[0119] The program 410 is specifically used to cause the processor 402 to perform the following operations:

[0120] Obtain a dynamic current test signal group, the dynamic current test signal group is composed of a first dynamic current test signal and a second dynamic current test signal, and the first dynamic current test signal and the second dynamic current test signal are obtained by splitting a steady-state current test signal;

[0121] Based on the target electricity meter, respectively measure the electricity data under various current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal;

[0122] Generate a test result for the accuracy of the measurement result of the target electricity meter according to the electricity data under the various current test signals.

[0123] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the physical device for verifying the accuracy of the measurement results of the electricity meter, and supports the operation of the information processing program and other software and / or programs. The network communication module is used to implement the communication between the components inside the storage medium, as well as the communication with other hardware and software in the information processing physical device.

[0124] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the system embodiment, since it basically corresponds to the method embodiment, the description is relatively simple. For the relevant parts, reference can be made to the partial description of the method embodiment.

[0125] The methods and systems of the present application can be implemented in many ways. For example, the methods and systems of the present application can be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above order of the steps for the methods is only for illustration. The steps of the methods of the present application are not limited to the specific order described above, unless otherwise specifically stated. In addition, in some embodiments, the present application can also be implemented as a program recorded in a recording medium, and these programs include machine-readable instructions for implementing the methods according to the present application. Therefore, the present application also covers a recording medium storing a program for executing the methods according to the present application.

[0126] Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present application can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. Optionally, they can be implemented by program codes executable by the computing device. Thus, they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a different order from here, or they can be separately made into individual integrated circuit modules, or multiple modules or steps among them can be made into a single integrated circuit module for implementation. In this way, the present application is not limited to any specific combination of hardware and software.

[0127] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for testing the accuracy of the measurement result of an electric energy meter, characterized in that, Including: Obtain a group of dynamic current test signals, where the group of dynamic current test signals consists of a first dynamic current test signal and a second dynamic current test signal, and the first dynamic current test signal and the second dynamic current test signal are obtained by splitting a steady-state current test signal; Based on the target electricity meter, respectively measure the electricity energy data under a variety of current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal; Generate a test result for the accuracy of the measurement result of the target electricity meter according to the electricity energy data under the variety of current test signals; The step of based on the target electricity meter respectively measuring the electricity energy data under a variety of current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal specifically includes: Within a first preset time period, based on the target electricity meter, respectively measure the first electricity energy data generated by the first dynamic current test signal, the second electricity energy data generated by the second dynamic current test signal, and the third electricity energy data generated by the steady-state current test signal; In the first half of a second preset time period, based on the target electricity meter, measure the fourth electricity energy data generated by the first dynamic current test signal, and in the second half of the second preset time period, based on the target electricity meter, measure the fifth electricity energy data generated by the second dynamic current test signal, where the second preset time period is twice the first preset time period; Sum and process the fourth electricity energy data and the fifth electricity energy data to generate sixth electricity energy data; The step of generating a test result for the accuracy of the measurement result of the target electricity meter according to the electricity energy data under the variety of current test signals specifically includes: If the sum of the first electricity energy data and the second electricity energy data is equal to the third electricity energy data and the sixth electricity energy data, then the test result for the accuracy of the measurement result of the target electricity meter is accurate; Otherwise, the test result for the accuracy of the measurement result of the target electricity meter is inaccurate, and an alarm message indicating that the test fails is output.

2. The method according to claim 1, characterized in that, The dynamic current signal period parameter of the first dynamic current test signal is equal to the dynamic current signal period parameter of the second dynamic current test signal.

3. The method according to claim 1, wherein Before the step of within a first preset time period, based on the target electricity meter, respectively measure the first electricity energy data generated by the first dynamic current test signal, the second electricity energy data generated by the second dynamic current test signal, and the third electricity energy data generated by the steady-state current test signal, the method further includes: Obtain the dynamic current signal period parameter and the power frequency current signal period parameter of the steady-state current test signal; Use the least common multiple of the dynamic current signal period parameter and the power frequency current signal period parameter as the first preset time period.

4. The method according to claim 1, wherein Before the step of based on the target electricity meter respectively measuring the electricity energy data under a variety of current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal, the method further includes: Based on the target electricity meter and a preset standard electricity meter, perform metering operations on the steady-state current test signal respectively; If the difference between the metering result of the target electricity meter and the metering result of the standard electricity meter is greater than a preset error threshold, terminate the test thread of the target electricity meter and output an alarm message indicating that the test fails.

5. A testing device for the accuracy of the measurement result of an electric energy meter, characterized in that, Including: An acquisition module, configured to acquire a dynamic current test signal group, which is composed of a first dynamic current test signal and a second dynamic current test signal, and the first dynamic current test signal and the second dynamic current test signal are obtained by splitting the steady-state current test signal; A metering module, configured to respectively meter the electricity data under various current test signals generated by the first dynamic current test signal, the second dynamic current test signal, and the steady-state current test signal based on the target electricity meter; A generation module, configured to generate a test result for the accuracy of the metering result of the target electricity meter according to the electricity data under the various current test signals; The metering module specifically includes: A first metering unit, configured to respectively meter, within a first preset time period, the first electricity data generated by the first dynamic current test signal, the second electricity data generated by the second dynamic current test signal, and the third electricity data generated by the steady-state current test signal based on the target electricity meter; A second metering unit, configured to meter, within the first half of a second preset time period, the fourth electricity data generated by the first dynamic current test signal based on the target electricity meter, and to meter, within the second half of the second preset time period, the fifth electricity data generated by the second dynamic current test signal based on the target electricity meter, and the second preset time period is twice the first preset time period; An addition unit, configured to perform addition processing on the fourth electricity data and the fifth electricity data to generate sixth electricity data; The generation module specifically is configured to: If the sum of the first electricity data and the second electricity data is equal to the third electricity data and the sixth electricity data, the test result for the accuracy of the metering result of the target electricity meter is accurate; Otherwise, the test result for the accuracy of the metering result of the target electricity meter is inaccurate, and an alarm message indicating that the test fails is output.

6. A storage medium, wherein at least one executable instruction is stored in the storage medium, characterized in that, The executable instruction causes the processor to perform the operations corresponding to the method for testing the accuracy of the metering result of the electricity meter according to any one of claims 1-4.

7. A terminal, comprising: A processor, a memory, a communication interface, and a communication bus, and the processor, the memory, and the communication interface complete communication with each other through the communication bus; The memory is used to store at least one executable instruction, and is characterized in that the executable instruction causes the processor to perform the operations corresponding to the method for testing the accuracy of the metering result of the electricity meter according to any one of claims 1-4.

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