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

Abstract

The application discloses a kind of methods and devices for reliability evaluation of electric energy meter, storage medium, equipment, comprising: by standard power source, voltage and current are output to the electric energy meter to be measured, the electric energy meter to be measured is detected, first detection, obtains first group of data;Interference signal is applied to the electric energy meter to be measured, waits for first preset time length, second detection, obtains second group of data;Remove interference signal, wait for second preset time length, third detection, obtains third group of data;Standard power source is closed, after waiting third preset time length, voltage and current are output to the electric energy meter to be measured;Wait for fourth preset time length, fourth detection, obtain fourth group of data;Wherein, each detection includes electric parameter detection, clock error detection, communication error detection and measurement error detection;Each detection result is compared, and the reliability degree grade of the electric energy meter to be measured is obtained.

Description

TECHNICAL FIELD

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

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

[0003] Most of the electric energy meters currently used by users are electronic smart meters, which contain a large number of electronic components and belong to industrial electronic products. The strength of the anti-interference ability of the electric energy meter has an important influence on whether it can reliably operate in the increasingly complex electromagnetic environment. Electric energy meters with insufficient anti-interference ability may affect the normal use of functions when affected by the electromagnetic environment.

[0004] In the prior art, there is a lack of a method for evaluating the reliability of an electric energy meter in a complex electromagnetic environment. Therefore, a method for testing the anti-interference ability of an electric energy meter and evaluating the reliability of the electric energy meter is needed, so that the tested electric energy meter can operate normally in a complex electromagnetic environment. SUMMARY

[0005] Therefore, the present application provides a method and device for evaluating the reliability of an electric energy meter, a storage medium and a computer device, 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] a standard power source outputs a rated working voltage and a rated working current to a to-be-tested electric energy meter, and a first detection is performed on the to-be-tested electric energy meter, to obtain a first group of data;

[0008] an interference signal is applied to the to-be-tested electric energy meter, and after a first preset time period, a second detection is performed on the to-be-tested electric energy meter, to obtain a second group of data, the interference signal including 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] the interference signal applied to the to-be-tested electric energy meter is removed, and after a second preset time period, a third detection is performed on the to-be-tested electric energy meter, to obtain a third group of data;

[0010] the standard power source is turned off, and after a third preset time period, the standard power source outputs the rated working voltage and the rated working current to the to-be-tested electric energy meter;

[0011] After waiting for a fourth preset time length, the fourth detection is performed on the to-be-tested electric energy meter to obtain a fourth group of data; wherein each detection includes electric parameter detection, clock error detection, communication error detection and measurement error detection;

[0012] The comparison module is configured to compare each detection result 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 a reliability level of the to-be-tested electric energy meter according to the comparison result.

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

[0014] The first detection module is configured to output a rated working voltage and a rated working current to the to-be-tested electric energy meter through a standard power source, and perform a first detection on the to-be-tested electric energy meter to obtain a first group of data;

[0015] The second detection module is configured to apply an interference signal to the to-be-tested electric energy meter, and after waiting for a first preset time length, perform a second detection on the to-be-tested electric energy meter to obtain a second group 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] The third detection module is configured to remove the interference signal applied to the to-be-tested electric energy meter, and after waiting for a second preset time length, perform a third detection on the to-be-tested electric energy meter to obtain a third group of data;

[0017] The restart module is configured to turn off the standard power source, and after waiting for a third preset time length, output the rated working voltage and the rated working current to the to-be-tested electric energy meter through the standard power source;

[0018] The fourth detection module is configured to, after waiting for a fourth preset time length, perform a fourth detection on the to-be-tested electric energy meter to obtain a fourth group of data; wherein each detection includes electric parameter detection, clock error detection, communication error detection and measurement error detection;

[0019] The comparison module is configured to compare each detection result 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 a reliability level of the to-be-tested electric energy meter according to the comparison result.

[0020] According to still another aspect of the present application, a storage medium having a computer program stored thereon is provided, wherein the program is executed by a processor to implement the above-mentioned method for evaluating the reliability of an electric energy meter.

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

[0022] By means of the technical solution, the present application provides a method and device for evaluating the reliability of an electric energy meter, a storage medium, and a computer device. 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 is applied 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 detections, the electric parameter detection result, the clock error detection result, the communication error detection result, and the measurement error detection result of the electric energy meter to be tested are obtained before the interference signal is applied, after the interference signal is applied for a first preset time length, after the interference signal is removed for a second preset time length, and after the standard power source is turned off and restarted for a fourth preset time length. The detection results are compared to obtain the reliability level of the electric energy meter to be tested. The reliability evaluation method of the electric energy meter under the complex electromagnetic environment interference is provided, and it is determined whether the electric energy meter to be tested can normally operate in the complex electromagnetic environment.

[0023] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic 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 flowchart of a method for evaluating the reliability of an electric energy meter provided by an embodiment of the present application is shown;

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

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

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

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

[0030] A method for evaluating the reliability of an electric energy meter is provided in the embodiment, as shown in the figure, the method comprises: Figure 1

[0031] In step 101, a standard power source outputs rated working voltage and rated working current to the electric energy meter to be tested, and the first detection is performed on the electric energy meter to be tested to obtain the first group of data.

[0032] The electric energy meter is an instrument for measuring electric energy, and the electric energy meter has different models. The electric energy meter to be tested is the electric energy meter to be evaluated for reliability.

[0033] Specifically, the standard power source outputs rated working voltage and rated working current to the electric energy meter to be tested, so that the electric energy meter to be tested works under the rated working voltage and the rated working current. Then, the first detection is performed on the electric energy meter to be tested, the detection content includes electric parameter detection, clock error detection, communication error detection and measurement error detection, and the corresponding detection results are obtained, which constitute the first group of data.

[0034] In step 102, an interference signal is applied to the electric energy meter to be tested, and after waiting for a first preset time, the second detection is performed on the electric energy meter to be tested to obtain the second group of data. 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.

[0035] The first preset time is a fixed time set in advance, and the purpose of waiting for the first preset time is to fully interfere with the electric energy meter to be tested by the applied interference signal. Optionally, the first preset time is one minute. It should be noted that the specific length of the first preset time can be modified according to requirements.

[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 2 kHz to 80 MHz, 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 typical electric power conducted disturbance interference signal characteristics. For example, the typical electric power conducted disturbance interference signal characteristics can be obtained by electric bicycle charging and field collection, and the corresponding frequency of the conducted disturbance interference signal can be generated by the conducted disturbance interference signal generator. The interference signal can also be output in a step-by-step frequency sweep from 2 kHz to 80 Hz. The conducted disturbance interference signal is applied 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 impulse signal is generated by a surge signal generator. The voltage, waveform characteristics, repetition times and interval times of the surge impulse signal are adjustable. The surge impulse signal is applied to the power line where the electric energy meter under test is located through a coupling and decoupling network to apply the surge impulse signal to the electric energy meter under test.

[0038] The constant magnetic field interference signal is generated by a constant magnetic field generator. The constant magnetic field generator can use a permanent magnet or an electromagnet to generate a constant magnetic field signal with a required intensity. The constant magnetic field intensity is adjustable and can reach a maximum of 600 mT. The constant magnetic field signal is applied to the electric energy meter under test in the form of spatial 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 3 mT.

[0040] Specifically, at least one of the conducted disturbance interference signal, the surge impulse signal, the constant magnetic field interference signal and the power frequency magnetic field interference signal is applied to the electric energy meter under test. After waiting for a first preset time length, the electric energy meter under test is detected for a second time. The detection content includes electric parameter detection, clock error detection, communication error detection and metering error detection. The corresponding detection results constitute a second group of data.

[0041] In step 103, the interference signal applied to the electric energy meter under test is removed. After waiting for a second preset time length, the electric energy meter under test is detected for a third time to obtain a third group of data.

[0042] The second preset time length is a fixed time length set in advance. 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. Alternatively, the second preset time length is one minute. It should be noted that the specific length of the second preset time length can be modified according to requirements.

[0043] Specifically, the interference signal applied to the electric energy meter under test is removed. After waiting for a second preset time length, the electric energy meter under test is detected for a third time. The detection content includes electric parameter detection, clock error detection, communication error detection and metering error detection. The corresponding detection results constitute a third group of data.

[0044] In step 104, the standard power source is turned off. After waiting for a third preset time length, the standard power source outputs the rated working voltage and the rated working current to the electric energy meter under test.

[0045] The third preset time length is a fixed time length set in advance, and the purpose of waiting for the third preset time length is to reduce interference and make the to-be-tested electric energy meter return to a normal state. Optionally, the third preset time length is one minute. It should be noted that the specific time length of the third preset time length can be modified according to requirements.

[0046] In step 105, after waiting for a fourth preset time length, the to-be-tested electric energy meter is detected for a fourth time to obtain a fourth group of data. Each detection includes electric parameter detection, clock error detection, communication error detection, and metering error detection.

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

[0048] Specifically, after waiting for the fourth preset time length, the to-be-tested electric energy meter is detected for a fourth time, and the detection content includes electric parameter detection, clock error detection, communication error detection, and metering error detection, to obtain corresponding detection results. The above results constitute a fourth group of data.

[0049] In step 106, each detection result in the first group of data, the second group of data, the third group of data, and the fourth group of data is compared to obtain a comparison result, and the reliability level of the to-be-tested electric energy meter is obtained according to the comparison result.

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

[0051] Specifically, the electric parameter detection result, the clock error detection result, the communication error detection result, and the metering error detection result 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 to-be-tested electric energy meter is obtained according to the comparison result.

[0052] By applying the technical solution of the embodiment, at least one of the conducted disturbance interference signal, the surge impact signal, the constant magnetic field interference signal and the power frequency magnetic field interference signal is applied to the to-be-tested electric energy meter, thereby creating a test condition that the to-be-tested electric energy meter is in a complex electromagnetic environment. Through four detections, the electric parameter detection result, the clock error detection result, the communication error detection result and the measurement error detection result of the to-be-tested electric energy meter before the interference signal is applied, after the interference signal is applied for a first preset time length, after the interference signal is removed for a second preset time length, and after the standard power source is turned off and restarted for a fourth preset time length are obtained. The detection results are compared, and the reliability level of the to-be-tested electric energy meter is obtained. The reliability evaluation method of the electric energy meter under the complex electromagnetic environment interference is given, and whether the to-be-tested electric energy meter can normally operate in the complex electromagnetic environment is confirmed.

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

[0054] In step 1061, it is judged 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 meets the similarity condition; if yes, it is determined that the reliability level of the to-be-tested electric energy meter is level one; if no, step 1062 is entered.

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

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

[0057] In step 1062, it is continuously judged whether each detection result of the first group of data, the third group of data and the fourth group of data meets the similarity condition; if yes, it is determined that the reliability level of the to-be-tested electric energy meter is level two; if no, step 1063 is entered.

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

[0059] If yes, it is determined that the reliability level of the to-be-tested electric energy meter is level three; if no, it is determined that the reliability level of the to-be-tested electric energy meter is level four. In the embodiment, it is determined whether the electric parameter detection result, the clock error detection result, the communication error detection result and the metering error detection result of the first group of data and the corresponding detection results of the fourth group of data are consistent. If the electric parameter detection result, the clock error detection result, the communication error detection result and the metering error detection result of the first group of data and the corresponding detection results of the fourth group of data are consistent, it is determined that the reliability level of the to-be-tested electric energy meter is level one; if not, it is determined that the reliability level of the to-be-tested electric energy meter is level four.

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

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

[0062] In step 201, the current effective value, the voltage effective value and the power factor of the to-be-tested electric energy meter are obtained through the target interface of the to-be-tested electric energy meter. The comparison of 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 obtains a comparison result, including: the electric parameter detection result of the second group of data, the electric parameter detection result of the third group of data and the electric parameter detection result of the fourth group of data are respectively compared with the electric parameter detection result of the first group of data to obtain corresponding calculation results; if the corresponding calculation result of any group of data is in the target interval, it is determined that the electric parameter detection result of the group of data meets the similarity condition.

[0063] The target interface is the RS485 interface of the to-be-tested electric energy meter. The target interval is determined according to the accuracy level of the to-be-tested electric energy meter. If the accuracy level of the to-be-tested electric energy meter is 1%, the target interval is [-2.0%, +2.0%], that is, the target interval is 2 times the accuracy level of the to-be-tested electric energy meter.

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

[0065] Specifically, the error of the electric parameter detection result of the second group of data, the electric parameter detection result of the third group of data and the electric parameter detection result of the fourth group of data is calculated by formula (1) respectively with the electric parameter detection result of the first group of data as a reference value, and the corresponding calculation results are obtained. Taking the voltage effective value in the electric parameter detection result of the first group of data as 221V and the voltage effective value in the electric parameter detection result of the second group of data as 223V as an example, the voltage effective value calculation result in the electric parameter detection result of the second group of data is 0.9%, and the calculation process is as follows:

[0066]

[0067]

[0068] The current effective value calculation result and the power factor calculation result in the electric parameter detection result 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 interval, it is determined that the electric parameter detection result of the data meets the similarity condition with the electric parameter detection result of the first group of data. The electric parameter detection results in the third group of data and the fourth group of data are calculated according to the above method of calculating the electric parameter detection result of the second group of data, and whether the electric parameter detection results in the third group of data and the fourth group of data meet the similarity condition is determined according to the above comparison method.

[0069] In the embodiment of the present application, the clock error detection of the to-be-tested electric energy meter is performed, including: obtaining a second pulse of the to-be-tested electric energy meter and calculating a daily time 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 a target clock error threshold from the daily time error in the first group of data, the second group of data, the third group of data and the fourth group of data respectively to obtain a first difference value; if the first difference value 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] Wherein, the definition of the second pulse is: in order to detect the clock accuracy of the electric energy meter, the clock in the meter sends a level every second to the external standard meter for calibration, and this level is called the second pulse. The target clock error threshold is 1s / d.

[0071] Specifically, the second pulse of the to-be-tested electric energy meter is acquired, and a daily timing error is calculated according to a time difference between the second pulse and a time of a standard timing tool. A first difference value is obtained by subtracting a target clock error threshold from the daily timing error in the first group of data, and if the first difference value is not greater than 1 s / d, it is determined that the clock error detection result in the first group of data satisfies 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 acquired according to the above method, and whether the clock error detection results in the second group of data, the third group of data and the fourth group of data satisfy the similarity condition is determined according to the above method.

[0072] In the embodiment of the present application, the communication error detection of the to-be-tested electric energy meter comprises: acquiring a first response result of the to-be-tested electric energy meter in response to a first target communication request through a target interface, and obtaining a first response rate according to a ratio of the first response result to the first target communication request; acquiring a second response result of the to-be-tested electric energy meter in response to a second target communication request through a carrier communication module, and obtaining a second response rate according to a 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, comprising: 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 with a target response rate respectively; if the first response rate and the second response rate corresponding to any one 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 satisfies the similarity condition.

[0073] The target interface is an RS485 interface of the to-be-tested electric energy meter. The first target request and the first response result are a request and a corresponding response result of communication between the upper computer and the to-be-tested electric energy meter through the RS485 interface. The first target communication request can be to query the current electric quantity recorded by the to-be-tested electric energy meter. The first response result is a response result corresponding to the corresponding target request, and if the first target request is to query the current electric quantity recorded by the to-be-tested electric energy meter, the first response result is the current electric quantity recorded by the to-be-tested electric energy meter. The second target request and the second response result are a request and a corresponding response result of communication between the upper computer and the to-be-tested electric energy meter through the carrier communication module. The carrier communication module is located in the to-be-tested electric energy meter. The second target communication request can be to query the current electric quantity recorded by the to-be-tested electric energy meter. The second response result is a response result corresponding to the corresponding target request, and if the second target request is to query the current electric quantity recorded by the to-be-tested electric energy meter, the second response result is the current electric quantity recorded by the to-be-tested electric energy meter. The target response rate is a pre-set response rate data, which can be set according to different response rate requirements of the to-be-tested electric energy meter, and optionally, the target response rate is 95%.

[0074] Specifically, the host computer communicates with the to-be-tested electric energy meter through the RS485 interface for a first target number of times. The application does not limit the first target number, which can be customized according to requirements. Optionally, the first target number is 100. The host computer sends 100 first target communication requests to the to-be-tested electric energy meter through the RS485 interface. The to-be-tested electric energy meter obtains corresponding first response results according to the above requests and sends the first response results to the host computer through the RS485 interface. The first response rate is obtained according to the ratio of the number of the first response results received by the host computer to the number of the first target communication requests. The host computer also communicates with the carrier communication module of the to-be-tested electric energy meter for a second target number of times. The application does not limit the second target number, which can be customized according to requirements. Optionally, the second target number is 100. The host computer sends 100 second target communication requests to the to-be-tested electric energy meter through the carrier communication module. The to-be-tested electric energy meter obtains corresponding second response results according to the above requests and sends the second response results to the host computer through the carrier communication module. The second response rate is obtained according to the ratio of the number of the second response results received by the host computer to the number of the second target communication requests. It is judged 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. The communication error detection results in the second group of data, the third group of data and the fourth group of data are judged whether they meet the similarity condition by using the same judgment method as the communication error detection result of the first group of data, and the corresponding judgment results are recorded.

[0075] It can be understood that when communicating with the host computer through the RS485 interface and the carrier communication module of the to-be-tested electric energy meter, frames may be lost. Therefore, the first response rate and the second response rate may not be 100%, which need to be calculated.

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

[0077] Wherein, the target threshold is determined according to the accuracy level of the to-be-tested electric energy meter, if the accuracy level of the to-be-tested electric energy meter is 1%, the target interval is [-2.0%, +2.0%], that is, the target interval is 2 times of the accuracy level of the to-be-tested electric energy meter. The standard electric energy pulse number refers to the electric energy pulse number marked on the corresponding device. The actual electric energy pulse number refers to the actual electric energy pulse number measured by the corresponding device in the working process.

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

[0079]

[0080] In the embodiments of the present application, the to-be-tested electric energy meter further comprises an event record detection function; the event record information of the to-be-tested electric energy meter is obtained through the target interface of the to-be-tested electric energy meter, and the event record information records the occurrence time, end time and occurrence number of the constant electromagnetic interference event generated inside the to-be-tested electric energy meter; the reason for the constant electromagnetic interference event generated inside the to-be-tested electric energy meter is that the to-be-tested electric energy meter is applied with a constant electromagnetic interference signal.

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

[0082] In a specific embodiment, the accuracy level of the to-be-tested electric energy meter is taken as an example, and the corresponding similarity condition is shown in Table 1. For example, the second row and the fourth column record "≥95%", and the use method is to determine whether the RS485 and carrier communication detection result recorded by X1 is ≥95%. If the RS485 and carrier communication detection result recorded by X1 is ≥95%, it is determined that the RS485 and carrier communication detection result of X1 meets the similarity condition. For example, the second row and the fifth column record "±2%", and the use method is to determine whether the electric energy measurement error detection result recorded by X1 is in [-2%, +2%]. If the electric energy measurement error detection result recorded by X1 is in [-2%, +2%], it is determined that the electric energy measurement error detection result of X1 meets the similarity condition. The above-mentioned method is used to obtain the similarity condition corresponding to the detection result, and whether it meets the similarity condition is determined, which will not be described here. It should be noted that the error calculation of the electric parameter detection result takes the electric parameter detection result of the first group of data as the reference value, and therefore, the electric parameter detection result of the first group of data X1 has no similarity condition requirement.

[0083] Table 1 Similarity condition table

[0084]

[0085] In a specific embodiment, as Figure 1 a specific implementation of the method, an embodiment of the present application provides a device for evaluating the reliability of an electric energy meter, as shown in Figure 2 which comprises a standard power source, a coupling and decoupling network, a conducted disturbance signal generator, a surge impact signal generator, a constant magnetic field generator, a power frequency magnetic field generator, an electric parameter detection unit, a clock error detection unit, a communication error detection unit, an event record detection unit, and a measurement error detection unit. The conducted disturbance signal generator and the surge impact signal generator are spaced apart from the power frequency magnetic field generator by more than 1 m and spaced apart from the constant magnetic field generator by more than 0.5 m. The electric parameter detection unit is used to implement the electric parameter detection in the above-mentioned method, the clock error detection unit is used to implement the clock error detection in the above-mentioned method, the communication error detection unit is used to implement the communication error detection in the above-mentioned method, the event record detection unit is used to implement the event record detection in the above-mentioned method, and the measurement error detection unit is used to implement the measurement error detection in the above-mentioned method.

[0086] Optionally, a dedicated to-be-tested electric energy meter test station is configured, which can be spatially transformed to change the relative angle of the to-be-tested electric energy meter and the power frequency magnetic field disturbance signal and the constant magnetic field disturbance signal.

[0087] Further, as Figure 1The embodiments of the present application provide a device for reliability evaluation of an electric energy meter, as shown in the accompanying drawings. Figure 3 The device comprises:

[0088] A first detection module 301 is configured to output rated working voltage and rated working current to a to-be-detected electric energy meter through a standard power source, to perform first detection on the to-be-detected electric energy meter, and to obtain first data.

[0089] A second detection module 302 is configured to apply an interference signal to the to-be-detected electric energy meter, to perform second detection on the to-be-detected electric energy meter after waiting for a first preset time length, and to obtain second data. The interference signal comprises 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 configured to remove the interference signal applied to the to-be-detected electric energy meter, to perform third detection on the to-be-detected electric energy meter after waiting for a second preset time length, and to obtain third data.

[0091] A restart module 304 is configured to turn off the standard power source, to output the rated working voltage and the rated working current to the to-be-detected electric energy meter through the standard power source after waiting for a third preset time length.

[0092] A fourth detection module 305 is configured to perform fourth detection on the to-be-detected electric energy meter after waiting for a fourth preset time length, and to obtain fourth data. Each detection comprises electric parameter detection, clock error detection, communication error detection, and measurement error detection.

[0093] A comparison module 306 is configured to compare each detection result in the first data, the second data, the third data, and the fourth data to obtain a comparison result, and to obtain a reliability level of the to-be-detected electric energy meter according to the comparison result.

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

[0095] A first judgment unit is configured to judge whether each detection result of the first data, the second data, the third data, and the fourth data satisfies a similarity condition. If yes, it is determined that the reliability level of the to-be-detected electric energy meter is level one. If no, it enters a second judgment unit.

[0096] The second judgment unit is configured to continue to judge whether each detection result of the first data, the third data, and the fourth data satisfies the similarity condition. If yes, it is determined that the reliability level of the to-be-detected electric energy meter is level two. If no, it enters a third judgment unit.

[0097] The third judging unit is configured to continue judging whether each detection result of the first group of data and the fourth group of data satisfies the similarity condition; if yes, determining that the reliability level of the electric energy meter under test is level three; if not, determining that the reliability level of the electric energy meter under test is level four.

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

[0099] The electric parameter detection module is configured to acquire the current effective value, the voltage effective value and the power factor of the electric energy meter under test through the target interface of the electric energy meter under test.

[0100] The comparison module 306 comprises: performing error calculation on the electric parameter detection result of the second group of data, the electric parameter detection result of the third group of data and the electric parameter detection result of the fourth group of data respectively with the electric parameter detection result of the first group of data and obtaining corresponding calculation results; if the calculation result corresponding to any group of data is within a target interval, it is determined that the electric parameter detection result of the group of data satisfies the similarity condition.

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

[0102] The clock error detection module is configured to acquire the second pulse of the electric energy meter under test and calculate the daily timing error.

[0103] The comparison module 306 comprises: performing difference calculation on the daily timing error in the first group of data, the second group of data, the third group of data and the fourth group of data respectively with a target clock error threshold to obtain a first difference value; if the first difference value 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 satisfies the similarity condition.

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

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

[0106] The comparison module 306 comprises: 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 a target response rate respectively; if the first response rate and the second response rate corresponding to any one of the data are both greater than the target response rate, it is determined that the communication error detection result of the data meets the similarity condition.

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

[0108] The metering error detection module is configured to acquire 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 measured, 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 measured, to obtain an electric energy metering error result.

[0109] The comparison module 306 comprises: 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 a target response rate respectively; if the first response rate and the second response rate corresponding to any one of the data are both greater than the target response rate, it is determined that the communication error detection result of the data meets the similarity condition.

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

[0111] The event record detection module is configured to acquire event record information of the electric energy meter to be measured through a target interface of the electric energy meter to be measured, the event record information recording a time of occurrence, a time of ending and a number of occurrences of a constant electromagnetic interference event generated inside the electric energy meter to be measured; the constant electromagnetic interference event generated inside the electric energy meter to be measured is caused by the fact that the electric energy meter to be measured is applied with a constant electromagnetic interference signal.

[0112] It should be noted that other corresponding descriptions of the various functional units involved in the device for evaluating the reliability of the electric energy meter provided in the embodiments of the present application can be referred to the corresponding descriptions in the method, which will not be described here in detail. Figures 1 to 2

[0113] The embodiments of the present application further provide a computer device, which can be a personal computer, a server, a network device, etc., such as a personal computer, a server, a network device, etc. Figure 4 ​As shown, the computer device includes a bus, a processor, a memory and a communication interface, and can further include an input / output interface and a display device. The processor of the computer device is configured 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 running the operating system and the computer program in the non-volatile storage medium. The database of the computer device is configured to store location information. The network interface of the computer device is configured to communicate with an external terminal through a network connection. The computer program is executed by the processor to implement the steps in the method embodiments.

[0114] Those skilled in the art can understand that, Figure 4 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can 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, which can be non-volatile or volatile, and has stored thereon a computer program. The computer program is executed by a processor to implement the steps in the method embodiments described above.

[0116] In one embodiment, a computer program product is provided, which includes a computer program. The computer program is executed by a processor to implement the steps in the method embodiments described above.

[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 for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or 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. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of the methods can be included. Any reference to 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 (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric memory (Ferroelectric Random Access Memory, FRAM), phase change memory (Phase Change Memory, PCM), graphene memory, etc. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0119] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0120] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method of reliability evaluation of an electric energy meter, characterized by, The method comprises the following steps: a first detection is performed on the to-be-tested electric energy meter by outputting a rated working voltage and a rated working current to the to-be-tested electric energy meter through a standard power source, and a first group of data is obtained; a second detection is performed on the to-be-tested electric energy meter after a first preset time period after a disturbance signal is applied to the to-be-tested electric energy meter, and a second group of data is obtained, wherein the disturbance signal comprises at least one of a conducted disturbance signal, a surge impact signal, a constant magnetic field disturbance signal and a power frequency magnetic field disturbance signal; a third detection is performed on the to-be-tested electric energy meter after a second preset time period after the disturbance signal applied to the to-be-tested electric energy meter is removed, and a third group of data is obtained; the standard power source is turned off, the standard power source is restarted after a third preset time period, and the rated working voltage and the rated working current are output to the to-be-tested electric energy meter through the standard power source; a fourth detection is performed on the to-be-tested electric energy meter after a fourth preset time period, and a fourth group of data is obtained; wherein each detection comprises electric parameter detection, clock error detection, communication error detection and measurement error detection; comparison results are obtained by comparing each detection result in the first group of data, the second group of data, the third group of data and the fourth group of data, and a reliability level of the to-be-tested electric energy meter is obtained according to the comparison results.

2. The method of claim 1, wherein, The reliability level of the to-be-tested electric energy meter obtained according to the comparison results comprises: it is judged 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 meets a similarity condition; if yes, it is determined that the reliability level of the to-be-tested electric energy meter is level one; if no, it is judged whether each detection result of the first group of data, the third group of data and the fourth group of data meets the similarity condition; if yes, it is determined that the reliability level of the to-be-tested electric energy meter is level two; if no, it is judged whether each detection result of the first group of data and the fourth group of data meets the similarity condition; if yes, it is determined that the reliability level of the to-be-tested electric energy meter is level three; if no, it is determined that the reliability level of the to-be-tested electric energy meter is level four.

3. The method of claim 2, wherein, The electric parameter detection item comprises current effective value detection, voltage effective value detection and power factor detection, and the electric parameter detection of the to-be-tested electric energy meter comprises: the current effective value, the voltage effective value and the power factor of the to-be-tested electric energy meter are obtained through a target interface of the to-be-tested electric energy meter; comparison results of 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 are obtained, and the comparison results comprise: error calculation is performed 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 respectively with the electric parameter detection results of the first group of data, and corresponding calculation results are obtained; if the calculation result corresponding to any group of data is in a target interval, it is determined that the electric parameter detection result of the group of data meets the similarity condition.

4. The method of claim 2, wherein, The clock error detection of the to-be-tested electric energy meter comprises: Obtaining a second pulse of the to-be-tested electric energy meter and calculating a day time 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: Differencing the day 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 a target clock error threshold to obtain a first difference value; If the first difference value corresponding to any one 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 of claim 2, wherein, The communication error detection on the to-be-tested electric energy meter includes: Obtaining a first response result of the to-be-tested electric energy meter in response to a first target communication request through a target interface, and obtaining a first response rate according to a ratio of the first response result to the first target communication request; Obtaining a second response result of the to-be-tested electric energy meter in response to a second target communication request through a carrier communication module, and obtaining a second response rate according to a 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 group of data, the second group of data, the third group of data and the fourth group of data with a target response rate, respectively; If the first response rate and the second response rate corresponding to any one 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 of claim 2, wherein, The metering error detection on the to-be-tested electric energy meter includes: Obtaining the standard electric energy pulse number and the actual electric energy pulse number of the standard power source and the to-be-tested electric energy meter, and calculating an 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 to-be-tested electric energy meter 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 group of data, the second group of data, the third group of data and the fourth group of data with a target threshold, respectively; If the electric energy metering error result corresponding to any one 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 of claim 1, wherein, The to-be-tested electric energy meter further includes an event record detection function; Obtaining event record information of the to-be-tested electric energy meter through a target interface of the to-be-tested electric energy meter, the event record information recording a time of occurrence, an end time and a number of occurrences of a constant electromagnetic interference event generated inside the to-be-tested electric energy meter; The reason for the constant electromagnetic interference event generated inside the to-be-tested electric energy meter is that the to-be-tested electric energy meter is applied with a constant electromagnetic interference signal.

8. A device for evaluating the reliability of an electric energy meter, characterized in that: Including: A first detection module is configured to output a rated working voltage and a rated working current to a to-be-tested electric energy meter through a standard power source, and perform a first detection on the to-be-tested electric energy meter to obtain a first group of data; a second detection module, configured to apply an interference signal to the electric energy meter to be tested, wait for a first preset time period, and then 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; a third detection module, configured to remove the interference signal applied to the electric energy meter to be tested, wait for a second preset time period, and then perform a third detection on the electric energy meter to be tested to obtain a third set of data; a restart module, configured to shut down the standard power source, wait for a third preset time period, and then restart the standard power source, so as to output the rated operating voltage and the rated operating current to the electric energy meter to be tested through the standard power source; a fourth detection module, configured to perform a fourth detection on the electric energy meter to be tested after waiting for a fourth preset time period 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 stored thereon a computer program, 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 on 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.

Images