Method and device for evaluating reliability of electric energy meter, storage medium and equipment

Abstract

The invention discloses a method and device for evaluating the reliability of an electric energy meter, a storage medium and equipment, and the method comprises the steps: outputting voltage and current to a to-be-detected electric energy meter through a standard power source, carrying out the detection of the to-be-detected electric energy meter for the first time, and obtaining a first group of data; applying an interference signal to the to-be-detected electric energy meter, waiting for a first preset duration, and performing second detection to obtain a second group of data; removing the interference signal, waiting for a second preset duration, and performing third detection to obtain a third group of data; turning off the standard power source, and after waiting for a third preset duration, outputting voltage and current to the to-be-tested electric energy meter; waiting for a fourth preset duration, and performing fourth detection to obtain a fourth group of data; wherein each detection comprises electric parameter detection, clock error detection, communication error detection and metering error detection; and comparing the detection results to obtain the reliability level of the to-be-detected electric energy meter.

Description

Technical Field

[0001] The present application relates to the field of electric power, and in particular to a method and device, storage medium, and computer equipment for evaluating the reliability of an electric energy meter. Background Art

[0002] With the rapid development of communication and electronic technology, more and more electrical and electronic products are widely used, resulting in increasingly complex electromagnetic environments of space radiation interference and power line conduction interference.

[0003] The vast majority of electric energy meters currently used by users are electronic smart meters, which contain a large number of electronic components and are industrial electronic products. The strength of the anti-interference ability of the electric energy meter has an important impact on whether it can operate reliably in an increasingly complex electromagnetic environment. When an electric energy meter with insufficient anti-interference ability is affected by the electromagnetic environment, its normal function may be affected.

[0004] In the prior art, there is a lack of methods for evaluating the reliability of electric energy meters in complex electromagnetic environments. Therefore, a method is needed to test the anti-interference ability of electric energy meters and evaluate the reliability of electric energy meters, so that the tested electric energy meters can operate normally in complex electromagnetic environments. Summary of the invention

[0005] In view of this, the present application provides a method and device, storage medium, and computer equipment for reliability evaluation of an electric energy meter, which can evaluate the reliability of an electric energy meter in a complex electromagnetic environment.

[0006] According to one aspect of the present application, a method for evaluating the reliability of an electric energy meter is provided, comprising:

[0007] Outputting a rated working voltage and a rated working current to the electric energy meter to be tested by a standard power source, performing a first test on the electric energy meter to be tested, and obtaining a first set of data;

[0008] Applying an interference signal to the electric energy meter to be tested, and after waiting for a first preset time, performing a second detection on the electric energy meter to be tested to obtain a second set of data, wherein the interference signal includes at least one of a conducted disturbance interference signal, a surge impact signal, a constant magnetic field interference signal, and a power frequency magnetic field interference signal;

[0009] Remove the interference signal applied to the electric energy meter to be tested, wait for a second preset time, and then perform a third test on the electric energy meter to be tested to obtain a third set of data;

[0010] Turning off the standard power source, and after waiting for a third preset time, outputting the rated working voltage and the rated working current to the electric energy meter to be tested through the standard power source;

[0011] After waiting for a fourth preset time, the electric energy meter to be tested is tested for a fourth time to obtain a fourth set of data; wherein each test includes electric parameter detection, clock error detection, communication error detection and metering error detection;

[0012] The detection results in the first group of data, the second group of data, the third group of data and the fourth group of data are compared to obtain a comparison result, and the reliability level of the electric energy meter to be tested is obtained according to the comparison result.

[0013] According to another aspect of the present application, there is provided a device for evaluating the reliability of an electric energy meter, comprising:

[0014] A first detection module, used for outputting a rated working voltage and a rated working current to the electric energy meter to be tested through a standard power source, performing a first detection on the electric energy meter to be tested, and obtaining a first set of data;

[0015] a second detection module, used for applying an interference signal to the electric energy meter to be tested, and after waiting for a first preset time, performing a second detection on the electric energy meter to be tested to obtain a second set of data, wherein the interference signal includes at least one of a conducted disturbance interference signal, a surge impact signal, a constant magnetic field interference signal, and a power frequency magnetic field interference signal;

[0016] A third detection module, used for removing the interference signal applied to the electric energy meter to be tested, and after waiting for a second preset time, performing a third detection on the electric energy meter to be tested to obtain a third set of data;

[0017] A restart module, used for shutting down the standard power source, and after waiting for a third preset time, outputting the rated working voltage and the rated working current to the electric energy meter to be tested through the standard power source;

[0018] A fourth detection module, used for performing a fourth detection on the electric energy meter to be tested after waiting for a fourth preset time to obtain a fourth set of data; wherein each detection includes electrical parameter detection, clock error detection, communication error detection and metering error detection;

[0019] The comparison module is used to compare the detection results in the first group of data, the second group of data, the third group of data and the fourth group of data to obtain a comparison result, and obtain the reliability level of the electric energy meter to be tested according to the comparison result.

[0020] According to another aspect of the present application, a storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the above-mentioned method for evaluating the reliability of an electric energy meter is implemented.

[0021] According to another aspect of the present application, a computer device is provided, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the processor implements the above-mentioned method for reliability evaluation of an electric energy meter when executing the program.

[0022] By means of the above technical scheme, the present application provides a method and device, storage medium, and computer equipment for evaluating the reliability of an electric energy meter, which applies at least one of a conducted disturbance interference signal, a surge impact signal, a constant magnetic field interference signal, and an industrial frequency magnetic field interference signal to the electric energy meter to be tested, thereby creating a test condition in which the electric energy meter to be tested is in a complex electromagnetic environment. Through four tests, the electric parameter detection results, clock error detection results, communication error detection results, and metering error detection results of the electric energy meter to be tested are obtained before applying the interference signal, after applying the interference signal for the first preset time, after withdrawing the interference signal for the second preset time, and after shutting down and restarting the standard power source for the fourth preset time. The above test results are compared to obtain the reliability level of the electric energy meter to be tested. A method for evaluating the reliability of an electric energy meter under interference from a complex electromagnetic environment is provided to confirm whether the electric energy meter to be tested can operate normally in a complex electromagnetic environment.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 A schematic flow chart of a method for evaluating the reliability of an electric energy meter provided in an embodiment of the present application is shown;

[0026] Figure 2 A schematic diagram of the structure of a device for evaluating the reliability of an electric energy meter provided in an embodiment of the present application is shown;

[0027] Figure 3 A schematic structural diagram of another device for evaluating the reliability of an electric energy meter provided in an embodiment of the present application is shown;

[0028] Figure 4 A schematic diagram of the device structure of a computer device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0029] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0030] In this embodiment, a method for evaluating the reliability of an electric energy meter is provided. Figure 1 As shown, the method includes:

[0031] Step 101: Outputting rated working voltage and rated working current to the electric energy meter to be tested through a standard power source, performing a first test on the electric energy meter to be tested, and obtaining a first set of data.

[0032] Among them, the electric energy meter is an instrument used to measure electric energy, and the electric energy meter has different models. The electric energy meter that needs to be evaluated for reliability is the electric energy meter to be tested.

[0033] Specifically, the rated working voltage and the rated working current are output to the electric energy meter under test through the standard power source, so that the electric energy meter under test works under the rated working voltage and the rated working current. After that, the electric energy meter under test is subjected to the first detection, and the detection content includes electrical parameter detection, clock error detection, communication error detection and metering error detection, and the corresponding detection results are obtained, and the above corresponding detection results constitute the first set of data.

[0034] Step 102, applying an interference signal to the electric energy meter to be tested, and after waiting for a first preset time, performing a second detection on the electric energy meter to be tested to obtain a second set of data, wherein the interference signal includes at least one of a conducted disturbance interference signal, a surge impact signal, a constant magnetic field interference signal, and an industrial frequency magnetic field interference signal.

[0035] The first preset time is a pre-set fixed time, and the purpose of waiting for the first preset time is to allow the electric energy meter to be fully disturbed by the applied interference signal. Optionally, the first preset time is one minute, and it should be noted that the specific time of the first preset time can be modified according to demand.

[0036] The conducted disturbance interference signal is generated by a conducted disturbance interference signal generator. The conducted disturbance interference signal generator is used to generate a conducted disturbance interference signal with a frequency of 2kHz to 80MHz, and the amplitude, frequency and phase of the conducted disturbance interference signal can be adjusted. The conducted disturbance interference signal generator can be adjusted according to the characteristics of typical power conducted disturbance interference signals. For example, the characteristics of typical power conducted disturbance interference signals can be obtained based on the charging of electric bicycles and on-site collection, and the conducted disturbance interference signal generator can generate a conducted disturbance interference signal of the corresponding frequency, or it can step and sweep the frequency from 2kHz to 80Hz to output the interference signal. It is also necessary to apply the conducted disturbance interference signal to the power line where the electric energy meter to be tested is located through a coupling and decoupling network to apply the conducted disturbance interference signal to the electric energy meter to be tested.

[0037] The surge signal is generated by a surge signal generator. The voltage, waveform characteristics, repetition times and interval time of the surge signal are all adjustable. The surge signal is applied to the power line where the energy meter under test is located through a coupling and decoupling network to apply the surge signal to the energy meter under test.

[0038] The constant magnetic field interference signal is generated by a constant magnetic field generator. The above-mentioned constant magnetic field generator can use a permanent magnet or an electromagnet to generate a constant magnetic field signal of the required strength. The constant magnetic field strength is adjustable and can reach a maximum of 600mT. The constant magnetic field signal is applied to the electric energy meter to be tested in the form of space radiation.

[0039] The power frequency magnetic field interference signal is generated by a power frequency magnetic field generator. The intensity of the power frequency magnetic field signal is adjustable, and the maximum power frequency magnetic field intensity reaches 3mT.

[0040] Specifically, at least one of a conducted disturbance interference signal, a surge impact signal, a constant magnetic field interference signal and an industrial frequency magnetic field interference signal is applied to the electric energy meter to be tested. After waiting for a first preset period of time, a second detection is performed on the electric energy meter to be tested. The detection content includes electrical parameter detection, clock error detection, communication error detection and measurement error detection, and corresponding detection results are obtained. The above corresponding detection results constitute a second set of data.

[0041] Step 103 , removing the interference signal applied to the electric energy meter to be tested, and after waiting for a second preset time, performing a third test on the electric energy meter to be tested to obtain a third set of data.

[0042] The second preset time length is a pre-set fixed time length, and the purpose of waiting for the second preset time length is to make the electric energy meter under test no longer disturbed by the interference signal applied in step 102 and return to a normal state. Optionally, the second preset time length is one minute, and it should be noted that the specific duration of the second preset time length can be modified according to demand.

[0043] Specifically, the interference signal applied to the electric energy meter to be tested is removed, and after waiting for the second preset time, the electric energy meter to be tested is tested for the third time. The detection content includes electrical parameter detection, clock error detection, communication error detection and measurement error detection, and corresponding detection results are obtained. The above results constitute the third group of data.

[0044] Step 104 , turning off the standard power source, and after waiting for a third preset time, outputting the rated working voltage and the rated working current to the electric energy meter to be tested through the standard power source.

[0045] The third preset time is a pre-set fixed time, and the purpose of waiting for the third preset time is to reduce interference and restore the electric energy meter to a normal state. Optionally, the third preset time is one minute, and it should be noted that the specific time of the third preset time can be modified according to demand.

[0046] Step 105, after waiting for a fourth preset time, the electric energy meter to be tested is tested for a fourth time to obtain a fourth set of data, wherein each test includes electric parameter detection, clock error detection, communication error detection and metering error detection.

[0047] The fourth preset time length is a pre-set fixed time length, and the purpose of waiting for the fourth preset time length is to make the electric energy meter to be tested in a stable state after being powered on. Optionally, the fourth preset time length is one minute, and it should be noted that the specific duration of the fourth preset time length can be modified according to demand.

[0048] Specifically, after waiting for the fourth preset time, the electric energy meter to be tested is tested for the fourth time, and the detection content includes electrical parameter detection, clock error detection, communication error detection and metering error detection, and corresponding detection results are obtained, and the above results constitute a fourth set of data.

[0049] Step 106, comparing the detection results in the first group of data, the second group of data, the third group of data and the fourth group of data to obtain a comparison result, and obtaining a reliability level of the electric energy meter to be tested according to the comparison result.

[0050] Optionally, the reliability level of the electric energy meter to be tested is divided into four levels, and other grading methods may also be obtained according to different classifications of the comparison results, which are not limited here.

[0051] Specifically, the electrical parameter detection results, clock error detection results, communication error detection results and metering error detection results of the first group of data are compared with the corresponding detection results of the second group of data, the third group of data and the fourth group of data, and the reliability level of the electric energy meter to be tested is obtained according to the comparison results.

[0052] By applying the technical solution of this embodiment, at least one of the conducted disturbance interference signal, surge impulse signal, constant magnetic field interference signal and power frequency magnetic field interference signal is applied to the electric energy meter to be tested, creating a test condition in which the electric energy meter to be tested is in a complex electromagnetic environment. Through four tests, the electric parameter detection results, clock error detection results, communication error detection results and metering error detection results of the electric energy meter to be tested are obtained before applying the interference signal, after applying the interference signal for the first preset time, after withdrawing the interference signal for the second preset time, and after shutting down and restarting the standard power source for the fourth preset time. And compare the above test results to obtain the reliability level of the electric energy meter to be tested. A reliability evaluation method for electric energy meters under complex electromagnetic environment interference is given to confirm whether the electric energy meter to be tested can operate normally in a complex electromagnetic environment.

[0053] In the embodiment of the present application, optionally, obtaining the reliability level of the electric energy meter to be tested according to the comparison result in step 106 includes:

[0054] Step 1061, determine whether the detection results of the first group of data, the second group of data, the third group of data and the fourth group of data all meet the similarity condition; if so, determine that the reliability level of the electric energy meter to be tested is level one; if not, enter step 1062.

[0055] Among them, whether the data meets the similarity condition refers to whether the two data are consistent.

[0056] Specifically, it is determined whether the electric parameter detection results, clock error detection results, communication error detection results, and metering error detection results of the first set of data are consistent with the corresponding detection results of the second set of data, the third set of data, and the fourth set of data. If the electric parameter detection results, clock error detection results, communication error detection results, and metering error detection results of the first set of data are consistent with the corresponding detection results of the second set of data, the third set of data, and the fourth set of data, it is determined that the reliability level of the electric energy meter to be tested is level one; if not, it proceeds to step 1062.

[0057] Step 1062, continue to determine whether the detection results of the first group of data, the third group of data and the fourth group of data all meet the similarity condition; if so, determine that the reliability level of the electric energy meter to be tested is level 2; if not, enter step 1063.

[0058] Specifically, it is determined whether the electrical parameter detection results, clock error detection results, communication error detection results, and metering error detection results of the first set of data are consistent with the corresponding detection results of the third set of data and the fourth set of data. If the electrical parameter detection results, clock error detection results, communication error detection results, and metering error detection results of the first set of data are consistent with the corresponding detection results of the third set of data and the fourth set of data, it is determined that the reliability level of the electric energy meter to be tested is level one; if not, it proceeds to step 1064.

[0059] Step 1064, continue to determine whether the detection results of the first group of data and the fourth group of data meet the similarity condition; if so, determine that the reliability level of the electric energy meter to be tested is level three; if not, determine that the reliability level of the electric energy meter to be tested is level four. In this embodiment, determine whether the electrical parameter detection results, clock error detection results, communication error detection results, and metering error detection results of the first group of data are consistent with the corresponding detection results of the fourth group of data. If the electrical parameter detection results, clock error detection results, communication error detection results, and metering error detection results of the first group of data are consistent with the corresponding detection results of the fourth group of data, determine that the reliability level of the electric energy meter to be tested is level one; if not, determine that the reliability level of the electric energy meter to be tested is level four.

[0060] By applying the technical solution of this embodiment, the electric energy meters to be tested can be divided into four reliability levels according to the detection results of each group of data.

[0061] In the embodiment of the present application, optionally, the electrical parameter detection items include current effective value detection, voltage effective value detection and power factor detection, and performing the electrical parameter detection on the electric energy meter to be tested includes:

[0062] Step 201, obtaining the current effective value, voltage effective value and power factor of the electric energy meter to be tested through the target interface of the electric energy meter to be tested. Comparing the electric parameter detection results in the first group of data, the second group of data, the third group of data and the fourth group of data to obtain a comparison result, including: performing error calculation on the electric parameter detection results of the second group of data, the electric parameter detection results of the third group of data and the electric parameter detection results of the fourth group of data with the electric parameter detection results of the first group of data respectively and obtaining corresponding calculation results; if the calculation result corresponding to any group of data is within the target interval, then determining the similarity condition of the electric parameter detection results of the group of data.

[0063] The target interface is the RS485 interface of the electric energy meter to be tested. The target interval is determined according to the accuracy level of the electric energy meter to be tested. If the accuracy level of the electric energy meter to be tested is 1%, the target interval is [-2.0%, +2.0%], that is, the target interval is twice the accuracy level of the electric energy meter to be tested.

[0064] Optionally, the effective value of current, effective value of voltage and power factor of the electric energy meter to be tested are read through the RS485 interface of the electric energy meter to be tested.

[0065] Specifically, the electrical parameter detection results of the first set of data are used as reference values, and the electrical parameter detection results of the second set of data, the electrical parameter detection results of the third set of data, and the electrical parameter detection results of the fourth set of data are respectively calculated by formula (1), and the corresponding calculation results are obtained. For example, the voltage effective value in the electrical parameter detection results of the first set of data is 221V, and the voltage effective value in the electrical parameter detection results of the second set of data is 223V. The calculation result of the voltage effective value in the electrical parameter detection results of the second set of data is 0.9%, and the calculation process is:

[0066]

[0067]

[0068] The current effective value calculation result and the power factor calculation result in the electrical parameter detection results of the second group of data are calculated according to the above calculation process. If the voltage effective value calculation result, the current effective value calculation result and the power factor calculation result of the second group of data are all within the target range, it is determined that the electrical parameter detection results of this group of data meet the similarity condition with the electrical parameter detection results of the first group of data. The electrical parameter detection results in the third group of data and the fourth group of data are calculated according to the above method for calculating the electrical parameter detection results of the second group of data, and it is determined whether the electrical parameter detection results in the third group of data and the fourth group of data meet the similarity condition according to the above comparison method.

[0069] In an embodiment of the present application, optionally, the clock error detection is performed on the electric energy meter to be tested, including: obtaining the second pulse of the electric energy meter to be tested and calculating the daily timing error; comparing the clock error detection results in the first group of data, the second group of data, the third group of data and the fourth group of data to obtain a comparison result, including: subtracting the daily timing errors in the first group of data, the second group of data, the third group of data and the fourth group of data from a target clock error threshold to obtain a first difference; if the first difference corresponding to any group of data is not greater than the target clock error threshold, it is determined that the clock error detection result of the data meets the similarity condition.

[0070] The definition of second pulse is: to detect the clock accuracy of the energy meter, the clock in the meter sends a level every second and sends it to the external standard meter for calibration. This level is called second pulse. The target clock error threshold is 1s / d.

[0071] Specifically, the second pulse of the electric energy meter to be tested is obtained, and the daily timing error is calculated based on the time difference between the second pulse and the standard timing tool. The daily timing error in the first group of data is subtracted from the target clock error threshold to obtain a first difference. If the first difference is not greater than 1s / d, it is determined that the clock error detection result in the first group of data meets the similarity condition. The clock error detection results in the second group of data, the third group of data, and the fourth group of data are obtained according to the above method, and it is determined whether the clock error detection results in the second group of data, the third group of data, and the fourth group of data meet the similarity condition according to the above method.

[0072] In an embodiment of the present application, the communication error detection is performed on the electric energy meter to be tested, including: obtaining a first response result of the electric energy meter to be tested in response to a first target communication request through a target interface, and obtaining a first response rate according to the ratio of the first response result to the first target communication request; obtaining a second response result of the electric energy meter to be tested in response to a second target communication request through a carrier communication module, and obtaining a second response rate according to the ratio of the second response result to the second target communication request; comparing the first response rate and the second response rate in the first group of data, the second group of data, the third group of data and the fourth group of data to obtain a comparison result, including: comparing the first response rate and the second response rate in the first data, the second data, the third data and the fourth data with the target response rate respectively; if the first response rate and the second response rate corresponding to any group of data are greater than the target response rate, it is determined that the communication error detection result of the group of data meets the similarity condition.

[0073] Among them, the target interface is the RS485 interface of the electric energy meter to be tested. The first target request and the first response result are the request and the corresponding response result for the host computer to communicate with the electric energy meter to be tested through the RS485 interface. The first target communication request may be to query the current power recorded by the electric energy meter to be tested. The first response result is the response result corresponding to the corresponding target request. If the first target request is to query the current power recorded by the electric energy meter to be tested, the first response result is the current power recorded by the electric energy meter to be tested. The second target request and the second response result are the request and the corresponding response result for the host computer to communicate with the electric energy meter to be tested through the carrier communication module. The above-mentioned carrier communication module is located in the electric energy meter to be tested. The second target communication request may be to query the current power recorded by the electric energy meter to be tested. The second response result is the response result corresponding to the corresponding target request. If the second target request is to query the current power recorded by the electric energy meter to be tested, the second response result is the current power recorded by the electric energy meter to be tested. The target response rate is a preset response rate data, which can be set numerically according to different response rate requirements of the electric energy meter to be tested. Optionally, the target response rate is 95%.

[0074] Specifically, the host computer and the electric energy meter to be tested perform data communication of the first target number of times through the RS485 interface. The present application does not limit the first target number of times, and the first target number of times can be customized according to the needs. Optionally, the first target number of times is 100 times. The host computer sends 100 first target communication requests to the electric energy meter to be tested through the RS485 interface, and the electric energy meter to be tested obtains the corresponding first response result according to the above request, and sends the above first response result to the host computer through the RS485 interface. The first response rate is obtained according to the ratio of the number of first response results received by the host computer to the number of first target communication requests. The host computer also performs data communication of the second target number of times with the carrier communication module of the electric energy meter to be tested. The present application does not limit the second target number of times, and the second target number of times can be customized according to the needs. Optionally, the second target number of times is 100 times. The host computer sends 100 second target communication requests to the electric energy meter to be tested through the carrier communication module, and the electric energy meter to be tested obtains the corresponding second response result according to the above request, and sends the above second response result to the host computer through the carrier communication module. The second response rate is obtained according to the ratio of the number of second response results received by the host computer to the number of second target communication requests. It is determined whether the first response rate and the second response rate of the first group of data are greater than 95%. If the first response rate and the second response rate of the first group of data are greater than 95%, it is determined that the communication error detection result of the first group of data meets the similarity condition. Using the same judgment method as the communication error detection result of the first group of data, it is determined whether the communication error detection results in the second group of data, the third group of data and the fourth group of data meet the similarity condition, and the corresponding judgment results are recorded.

[0075] It is understandable that when the RS485 interface and carrier communication module of the electric energy meter to be tested communicate with the host computer, frame loss may occur. Therefore, the first response rate and the second response rate may not be 100% and need to be calculated.

[0076] In an embodiment of the present application, the metering error detection is performed on the electric energy meter to be tested, including: obtaining the standard electric energy pulse number and the actual electric energy pulse number of the standard power source and the electric energy meter to be tested, and calculating the electric energy metering error according to the standard electric energy pulse number and the actual electric energy pulse number of the standard power source and the electric energy meter to be tested, to obtain an electric energy metering error result; comparing the metering error detection results in the first group of data, the second group of data, the third group of data and the fourth group of data to obtain a comparison result, including: comparing the electric energy metering error results of the first data, the second data, the third data and the fourth data with the target threshold value respectively; if the electric energy metering error result corresponding to any group of data is not greater than the target threshold value, it is determined that the metering error detection result of the group of data meets the similarity condition.

[0077] The target threshold is determined according to the accuracy level of the electric energy meter to be tested. If the accuracy level of the electric energy meter to be tested is 1%, the target interval is [-2.0%, +2.0%], that is, the target interval is 2 times the accuracy level of the electric energy meter to be tested. The standard electric energy pulse number refers to the number of electric energy pulses marked on the corresponding equipment. The actual electric energy pulse number refers to the number of electric energy pulses actually measured by the corresponding equipment during operation.

[0078] Specifically, obtain the standard electric energy pulse number K of the standard power source, obtain the actual electric energy pulse number a of the standard power source, obtain the standard electric energy pulse number N of the electric energy meter to be tested, and obtain the actual electric energy pulse number b of the electric energy meter to be tested. Calculate the electric energy metering error according to the standard electric energy pulse number K and the actual electric energy pulse number a of the standard power source, the standard electric energy pulse number N and the actual electric energy pulse number b of the electric energy meter to be tested, and formula (2) to obtain the electric energy metering error result ε. Calculate the electric energy metering error result of the first group of data according to the above formula (2). If the accuracy level of the electric energy meter to be tested is 1%, the target interval is [-2.0%, +2.0%]. Determine whether the electric energy metering error result of the first group of data is within the target interval [-2.0%, +2.0%]. If the electric energy metering error result of the first group of data is within the target interval [-2.0%, +2.0%], it is determined that the electric energy metering error result of the first group of data meets the similarity condition. According to the above method for calculating the electric energy metering error results of the first group of data, the electric energy metering error results in the second group of data, the third group of data and the fourth group of data are calculated, and according to the above judgment method, it is determined whether the electric energy metering error results in the two groups of data, the third group of data and the fourth group of data meet the similarity conditions.

[0079]

[0080] In an embodiment of the present application, the electric energy meter to be tested also includes an event recording detection function; the event recording information of the electric energy meter to be tested is obtained through the target interface of the electric energy meter to be tested, and the event recording information records the occurrence time, end time and number of occurrences of the constant electromagnetic interference event generated inside the electric energy meter to be tested; the reason why the constant electromagnetic interference event is generated inside the electric energy meter to be tested is that a constant electromagnetic interference signal is applied to the electric energy meter to be tested.

[0081] Specifically, a constant electromagnetic interference signal is applied to the electric energy meter to be tested, and a constant electromagnetic interference event is generated inside the electric energy meter to be tested. The electric energy meter to be tested records the occurrence time, end time and number of occurrences of the constant electromagnetic interference event generated inside it. The event record information, that is, the occurrence time, end time and number of occurrences of the recorded constant electromagnetic interference event, is obtained through the RS485 interface of the target interface machine of the electric energy meter to be tested. The time record information is compared with the application information. If they are inconsistent, it is considered that the corresponding electric energy meter to be tested does not meet the factory requirements.

[0082] In a specific embodiment, the accuracy level of the electric energy meter to be tested is 1% as an example, and its corresponding similarity condition is shown in Table 1. The method of use, taking the fourth column of the second row as an example, the fourth column of the second row records "≥95%", and the method of use is to determine whether the RS485 and carrier communication detection results recorded by X1 are ≥95%. If the RS485 and carrier communication detection results recorded by X1 are ≥95%, then it is determined that the RS485 and carrier communication detection results of X1 meet the similarity condition. Taking the fifth column of the second row as an example, it records "±2%". The method of use is to determine whether the electric energy metering error detection result recorded by X1 is in [-2%, +2%]. If the electric energy metering error detection result recorded by X1 is in [-2%, +2%], then it is determined that the electric energy metering error detection result of X1 meets the similarity condition. The similarity condition corresponding to the detection result is obtained in the above manner, and it is determined whether it meets the similarity condition, which will not be repeated here. It should be noted that the error calculation of the electrical parameter detection result uses the electrical parameter detection result of the first set of data as a reference value. Therefore, there is no similarity condition requirement for the electrical parameter detection result of the first set of data X1.

[0083] Table 1 Similarity condition table

[0084]

[0085] In a specific embodiment, as Figure 1 The specific implementation of the method, the embodiment of the present application provides a device for evaluating the reliability of an electric energy meter, such as Figure 2 As shown, the device includes: a standard power source, a coupling and decoupling network, a conducted disturbance signal generator, a surge signal generator, a constant magnetic field generator, a power frequency magnetic field generator, an electrical parameter detection unit, a clock error detection unit, a communication error detection unit, an event record detection unit, and a metering error detection unit. Among them, the conducted disturbance signal generator and the surge signal generator are separated from the power frequency magnetic field generator by more than 1m, and separated from the constant magnetic field generator by more than 0.5m. The electrical parameter detection unit is used to implement the electrical parameter detection in the above method, the clock error detection unit is used to implement the clock error detection in the above method, the communication error detection unit is used to implement the communication error detection in the above method, the event record detection unit is used to implement the event record detection in the above method, and the metering error detection unit is used to implement the metering error detection in the above method.

[0086] Optionally, a dedicated test station for the electric energy meter to be tested is configured, and the position of the station can be changed in space to achieve the function of changing the relative angle between the electric energy meter to be tested and the power frequency magnetic field interference signal and the constant magnetic field interference signal.

[0087] Further, as Figure 1The specific implementation of the method, the embodiment of the present application provides a device for evaluating the reliability of an electric energy meter, such as Figure 3 As shown, the device comprises:

[0088] The first detection module 301 is used to output the rated working voltage and the rated working current to the electric energy meter to be tested through a standard power source, perform a first detection on the electric energy meter to be tested, and obtain a first set of data;

[0089] The second detection module 302 is used to apply an interference signal to the electric energy meter to be tested, and after waiting for a first preset time, perform a second detection on the electric energy meter to be tested to obtain a second set of data, wherein the interference signal includes at least one of a conducted disturbance interference signal, a surge impact signal, a constant magnetic field interference signal, and a power frequency magnetic field interference signal;

[0090] A third detection module 303 is used to remove the interference signal applied to the electric energy meter to be tested, wait for a second preset time, and then perform a third detection on the electric energy meter to be tested to obtain a third set of data;

[0091] A restart module 304 is used to turn off the standard power source, wait for a third preset time, and then output the rated working voltage and the rated working current to the electric energy meter to be tested through the standard power source;

[0092] The fourth detection module 305 is used to perform a fourth detection on the electric energy meter to be tested after waiting for a fourth preset time to obtain a fourth set of data; wherein each detection includes electrical parameter detection, clock error detection, communication error detection and metering error detection;

[0093] The comparison module 306 is used to compare the detection results in the first group of data, the second group of data, the third group of data and the fourth group of data to obtain a comparison result, and obtain the reliability level of the electric energy meter to be tested according to the comparison result.

[0094] In one embodiment, the comparison module 306 includes:

[0095] The first judgment unit is used to judge whether the detection results of the first group of data, the second group of data, the third group of data and the fourth group of data all meet the similarity condition; if so, determine that the reliability level of the electric energy meter to be tested is level one; if not, enter the second judgment unit.

[0096] The second judgment unit is used to continue to judge whether the detection results of the first group of data, the third group of data and the fourth group of data all meet the similarity condition; if so, determine that the reliability level of the electric energy meter to be tested is level two; if not, enter the third judgment unit.

[0097] The third judgment unit is used to continue to judge whether the detection results of the first group of data and the fourth group of data meet the similarity condition; if so, determine that the reliability level of the electric energy meter to be tested is level three; if not, determine that the reliability level of the electric energy meter to be tested is level four.

[0098] In one embodiment, the device for evaluating the reliability of an electric energy meter further includes:

[0099] An electrical parameter detection module, used for obtaining the effective value of current, effective value of voltage and power factor of the electric energy meter to be tested through the target interface of the electric energy meter to be tested;

[0100] The comparison module 306 includes: performing error calculation on the electrical parameter detection results of the second group of data, the electrical parameter detection results of the third group of data and the electrical parameter detection results of the fourth group of data with the electrical parameter detection results of the first group of data, and obtaining corresponding calculation results; if the calculation results corresponding to any group of data are within the target range, it is determined that the electrical parameter detection results of the group of data meet the similarity condition.

[0101] In one embodiment, the device for evaluating the reliability of an electric energy meter further includes:

[0102] A clock error detection module is used to obtain the second pulse of the electric energy meter to be tested and calculate the daily timing error;

[0103] The comparison module 306 includes: subtracting the daily timing errors in the first group of data, the second group of data, the third group of data and the fourth group of data from the target clock error threshold to obtain a first difference; if the first difference corresponding to any group of data is not greater than the target clock error threshold, it is determined that the clock error detection result of the data meets the similarity condition.

[0104] In one embodiment, the device for evaluating the reliability of an electric energy meter further includes:

[0105] a communication error detection module, configured to obtain, through a target interface, a first response result of the electric energy meter under test in response to a first target communication request, and obtain a first response rate according to a ratio of the first response result to the first target communication request; obtain, through a carrier communication module, a second response result of the electric energy meter under test in response to a second target communication request, and obtain a second response rate according to a ratio of the second response result to the second target communication request;

[0106] The comparison module 306 includes: comparing the first response rate and the second response rate in the first data, the second data, the third data and the fourth data with the target response rate respectively; if the first response rate and the second response rate corresponding to any group of data are greater than the target response rate, it is determined that the communication error detection result of the group of data meets the similarity condition.

[0107] In one embodiment, the device for evaluating the reliability of an electric energy meter further includes:

[0108] A metering error detection module, used to obtain the standard electric energy pulse number and the actual electric energy pulse number of the standard power source and the electric energy meter to be tested, and calculate the electric energy metering error according to the standard electric energy pulse number and the actual electric energy pulse number of the standard power source and the electric energy meter to be tested, to obtain the electric energy metering error result;

[0109] The comparison module 306 includes: comparing the electric energy metering error results of the first data, the second data, the third data, and the fourth data with the target threshold value respectively; if the electric energy metering error result corresponding to any group of data is not greater than the target threshold value, determining that the metering error detection result of the group of data meets the similarity condition.

[0110] In one embodiment, the device for evaluating the reliability of an electric energy meter further includes:

[0111] An event record detection module is used to obtain event record information of the electric energy meter under test through the target interface of the electric energy meter under test, wherein the event record information records the occurrence time, end time and number of occurrences of a constant electromagnetic interference event generated inside the electric energy meter under test; the reason why the constant electromagnetic interference event is generated inside the electric energy meter under test is that a constant electromagnetic interference signal is applied to the electric energy meter under test.

[0112] It should be noted that for other corresponding descriptions of the functional units involved in the device for evaluating the reliability of an electric energy meter provided in the embodiment of the present application, reference can be made to Figure 1 to Figure 2 The corresponding description in the method will not be repeated here.

[0113] The present application also provides a computer device, which may be a personal computer, a server, a network device, etc. Figure 4As shown, the computer device includes a bus, a processor, a memory and a communication interface, and may also include an input and output interface and a display device. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store location information. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, the steps in each method embodiment are implemented.

[0114] Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0115] In one embodiment, a computer-readable storage medium is provided. The computer-readable storage medium may be non-volatile or volatile, and stores a computer program thereon. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0116] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0117] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0118] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0119] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for evaluating the reliability of an electric energy meter, characterized in that: include: Outputting a rated working voltage and a rated working current to the electric energy meter to be tested by a standard power source, performing a first test on the electric energy meter to be tested, and obtaining a first set of data; Applying an interference signal to the electric energy meter to be tested, and after waiting for a first preset time, performing a second detection on the electric energy meter to be tested to obtain a second set of data, wherein the interference signal includes at least one of a conducted disturbance interference signal, a surge impact signal, a constant magnetic field interference signal, and a power frequency magnetic field interference signal; Remove the interference signal applied to the electric energy meter to be tested, wait for a second preset time, and then perform a third test on the electric energy meter to be tested to obtain a third set of data; Turning off the standard power source, and after waiting for a third preset time, outputting the rated working voltage and the rated working current to the electric energy meter to be tested through the standard power source; After waiting for a fourth preset time, the electric energy meter to be tested is tested for a fourth time to obtain a fourth set of data; wherein each test includes electric parameter detection, clock error detection, communication error detection and metering error detection; The detection results in the first group of data, the second group of data, the third group of data and the fourth group of data are compared to obtain a comparison result, and the reliability level of the electric energy meter to be tested is obtained according to the comparison result.

2. The method according to claim 1, characterized in that The step of obtaining the reliability level of the electric energy meter to be tested according to the comparison result includes: Determine whether each detection result of the first group of data, the second group of data, the third group of data, and the fourth group of data all meet the similarity condition; If yes, it is determined that the reliability level of the electric energy meter to be tested is level one; If not, continue to determine whether the detection results of the first set of data, the third set of data, and the fourth set of data all meet the similarity condition; If yes, it is determined that the reliability level of the electric energy meter to be tested is level 2; If not, continue to determine whether the detection results of the first set of data and the fourth set of data meet the similarity condition; If yes, it is determined that the reliability level of the electric energy meter to be tested is level three; If not, it is determined that the reliability level of the electric energy meter to be tested is level four.

3. The method according to claim 1, characterized in that The electrical parameter detection items include current effective value detection, voltage effective value detection and power factor detection. The electrical parameter detection is performed on the electric energy meter to be tested, including: Acquire the current effective value, voltage effective value and power factor of the electric energy meter to be tested through the target interface of the electric energy meter to be tested; Comparing the electrical parameter detection results in the first set of data, the second set of data, the third set of data, and the fourth set of data to obtain a comparison result, including: Performing error calculation on the electrical parameter detection results of the second set of data, the electrical parameter detection results of the third set of data, and the electrical parameter detection results of the fourth set of data respectively with the electrical parameter detection results of the first set of data to obtain corresponding calculation results; If the calculation result corresponding to any group of data is within the target interval, it is determined that the electrical parameter detection result of the group of data meets the similarity condition.

4. The method according to claim 1, characterized in that: Performing the clock error detection on the electric energy meter to be tested includes: Obtain the second pulse of the electric energy meter to be tested and calculate the daily timing error; Comparing the clock error detection results in the first group of data, the second group of data, the third group of data, and the fourth group of data to obtain a comparison result, including: Subtract the daily time errors in the first group of data, the second group of data, the third group of data, and the fourth group of data from the target clock error threshold to obtain a first difference; If the first difference corresponding to any group of data is not greater than the target clock error threshold, it is determined that the clock error detection result of the data meets the similarity condition.

5. The method according to claim 1, characterized in that Performing the communication error detection on the electric energy meter to be tested includes: Acquire, through a target interface, a first response result of the electric energy meter to be tested in response to a first target communication request, and obtain a first response rate according to a ratio of the first response result to the first target communication request; Acquire a second response result of the electric energy meter to be tested in response to a second target communication request through a carrier communication module, and obtain a second response rate according to the ratio of the second response result to the second target communication request; Comparing the first response rate and the second response rate in the first group of data, the second group of data, the third group of data, and the fourth group of data to obtain a comparison result, including: comparing the first response rate and the second response rate in the first data, the second data, the third data and the fourth data with the target response rate respectively; If the first response rate and the second response rate corresponding to any group of data are both greater than the target response rate, it is determined that the communication error detection result of the group of data meets the similarity condition.

6. The method according to claim 1, characterized in that Performing the measurement error detection on the electric energy meter to be tested includes: Obtaining the standard electric energy pulse number and the actual electric energy pulse number of the standard power source and the electric energy meter to be tested, and calculating the electric energy measurement error according to the standard electric energy pulse number and the actual electric energy pulse number of the standard power source and the electric energy meter to be tested, to obtain the electric energy measurement error result; Comparing the measurement error detection results in the first set of data, the second set of data, the third set of data, and the fourth set of data to obtain a comparison result, including: comparing the electric energy metering error results of the first data, the second data, the third data and the fourth data with target thresholds respectively; If the electric energy metering error result corresponding to any group of data is not greater than the target threshold, it is determined that the metering error detection result of the group of data meets the similarity condition.

7. The method according to claim 1, characterized in that The electric energy meter to be tested also includes an event recording detection function; Acquire event record information of the electric energy meter to be tested through the target interface of the electric energy meter to be tested, wherein the event record information records the occurrence time, end time and occurrence frequency of the constant electromagnetic interference event generated inside the electric energy meter to be tested; The reason why a constant electromagnetic interference event is generated inside the electric energy meter to be tested is that a constant electromagnetic interference signal is applied to the electric energy meter to be tested.

8. A device for evaluating the reliability of an electric energy meter, characterized in that: include: A first detection module, used for outputting a rated working voltage and a rated working current to the electric energy meter to be tested through a standard power source, performing a first detection on the electric energy meter to be tested, and obtaining a first set of data; a second detection module, used for applying an interference signal to the electric energy meter to be tested, and after waiting for a first preset time, performing a second detection on the electric energy meter to be tested to obtain a second set of data, wherein the interference signal includes at least one of a conducted disturbance interference signal, a surge impact signal, a constant magnetic field interference signal, and a power frequency magnetic field interference signal; A third detection module, used for removing the interference signal applied to the electric energy meter to be tested, and after waiting for a second preset time, performing a third detection on the electric energy meter to be tested to obtain a third set of data; A restart module, used for shutting down the standard power source, and after waiting for a third preset time, outputting the rated working voltage and the rated working current to the electric energy meter to be tested through the standard power source; A fourth detection module, used for performing a fourth detection on the electric energy meter to be tested after waiting for a fourth preset time to obtain a fourth set of data; wherein each detection includes electrical parameter detection, clock error detection, communication error detection and metering error detection; The comparison module is used to compare the detection results in the first group of data, the second group of data, the third group of data and the fourth group of data to obtain a comparison result, and obtain the reliability level of the electric energy meter to be tested according to the comparison result.

9. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

10. A computer device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

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