Three-phase alternating current electric energy meter production calibration method capable of adaptively calibrating parameters

Abstract

The invention belongs to the field of electric energy meter calibration, and provides a three-phase alternating-current electric energy meter production calibration method capable of self-adapting to calibration parameters, which comprises the following steps of: dynamically calculating a calibration parameter mean value meeting requirements, writing the calibration parameter mean value into an electric energy meter, verifying the precision of the electric energy meter, and if some electric energy meters with the precision not meeting a precision set threshold value exist at the moment, determining the calibration parameter mean value; if yes, recalibration is carried out according to the traditional calibration steps, the ratio of the number of the electric energy meters with the precision meeting the precision set threshold value to N in the latest N electric energy meters with the calibration parameter mean value written therein is continuously recorded, and if the ratio is smaller than the proportion set value, the calibration parameter mean value is readjusted according to the method. According to the method, the calibration steps and the calibration parameters are adjusted in a self-adaptive manner, so that most of the steps of calibrating the electric energy meter are omitted, the production test time occupied by the calibration steps is effectively shortened, the production efficiency is improved, and the precision of the calibrated electric energy meter conforms to the precision set threshold value.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric energy meter calibration, and in particular relates to a production calibration method for a three-phase AC electric energy meter with adaptive calibration parameters. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The sampling resistor of the three-phase AC energy meter has deviations, which leads to errors in the voltage, current, power, and electricity it reads. If the accuracy of the energy meter is to meet the accuracy setting threshold, the energy meter needs to be calibrated.

[0004] The traditional calibration method is to provide the electric energy meter with standard voltage, current, and power factor, read the voltage RMS register, current RMS register, and active power register from the electric energy meter, and then calculate the calibration parameters, including voltage channel gain, current channel gain, and power phase, and write the calibration parameters into the electric energy meter.

[0005] In the actual production process, a large number of electricity meters need to be calibrated one by one. In actual use, the traditional calibration method has many measured data items and needs to constantly change different test conditions. The test steps are cumbersome and take up a lot of time in the electricity meter generation process, which reduces production efficiency. Summary of the Invention

[0006] To solve the above problems, the present invention proposes a production calibration method for three-phase AC electric energy meters with adaptive calibration parameters. The present invention dynamically calculates the mean value of the calibration parameters that meet the requirements, writes the mean value of the calibration parameters into the electric energy meter, and verifies the accuracy of the electric energy meter. At this time, if there are individual electric energy meters whose accuracy does not meet the accuracy setting threshold, they are recalibrated according to the traditional calibration steps, and the ratio of the number of electric energy meters whose accuracy meets the accuracy setting threshold to N among the latest N electric energy meters that have the mean value of the calibration parameters written is continuously recorded. When the ratio is less than the ratio setting value, the mean value of the calibration parameters is readjusted according to the above method. This method omits the vast majority of electric energy meter calibration steps by adaptively adjusting the calibration steps and calibration parameters, effectively reducing the time occupied by the calibration steps in production testing, improving production efficiency, and the accuracy of the calibrated electric energy meters meets the accuracy setting threshold.

[0007] According to some embodiments, a first solution of the present invention provides a three-phase AC electric energy meter production calibration method with adaptive calibration parameters, which adopts the following technical solutions: A production calibration method for a three-phase AC electric energy meter with adaptive calibration parameters includes: Perform traditional calibration on all the energy meters to be calibrated in turn; When the number M of successful traditional calibrations of the electric energy meters is equal to the success number threshold P, the average of the initial calibration parameters of the first P successful traditional calibrations of the electric energy meters is calculated; Based on the mean value of the initial calibration parameters, the calibration parameters of the first P electric energy meters that have successfully undergone traditional calibration, and the electrical parameters after traditional calibration, the accuracy of the first P electric energy meters after using the mean value of the initial calibration parameters is calculated; The accuracy of the first P electric energy meters is judged. When the accuracy of the electric energy meters meets the accuracy setting threshold, the number N of electric energy meters that have successfully calibrated their mean values ​​and the mean values ​​of the calibration parameters of these N electric energy meters are determined. Based on the mean value of the calibration parameters, the mean value of the subsequent energy meters to be calibrated is calibrated in sequence, and the accuracy of the latest N energy meters with the mean value of the calibration parameters written is continuously judged to determine the number C of successful mean calibrations; If the proportion of the number C of successful mean calibrations in the number N of successful mean calibrations of the energy meter is less than the set proportion, the number M of successful traditional calibrations of the energy meter is reset to zero, and the traditional calibration method is used again to determine the mean of the calibration parameters.

[0008] Furthermore, all the energy meters to be calibrated are calibrated in turn using the traditional method, specifically: The standard power source sets the rated voltage, rated current, and different power factors, and provides them to the electric energy meter, which reads the voltage RMS register, current RMS register, and active power register actually measured by the electric energy meter; Calculate calibration parameters, including voltage channel gain, current channel gain, power phase, and record the calibration parameters; Calibration parameters are written into the energy meter; The standard power source is set with different voltages, currents and power factors and provided to the energy meter. The voltage, current, power and amount actually measured by the energy meter are read and recorded.

[0009] Furthermore, when the number M of successful traditional calibrations of the electric energy meters is equal to the success number threshold P, the average of the initial calibration parameters of the first P successful traditional calibrations of the electric energy meters is calculated, specifically: When the number of successful traditional calibrations M is equal to the success number threshold P, the average of the initial calibration parameters of the first P successful traditional calibrations of the electric energy meters is calculated; The initial calibration parameter mean values ​​include an initial voltage channel gain mean value, an initial current channel gain mean value, and an initial power phase mean value.

[0010] Furthermore, based on the mean value of the initial calibration parameters, the calibration parameters of the first P electric energy meters that have successfully undergone traditional calibration, and the electrical parameters after traditional calibration, the accuracy of the first P electric energy meters after using the mean value of the initial calibration parameters is calculated, specifically: Determine the voltage, current, active power, and reactive power of each electric energy meter before traditional calibration using the voltage, current, active power, and reactive power of each electric energy meter after traditional calibration and the corresponding calibration parameters; Using the initial calibration parameter mean and the voltage, current, active power, and reactive power of each electric energy meter before traditional calibration, the voltage, current, active power, and reactive power of each electric energy meter after calibration using the initial calibration parameter mean are obtained; Determine the accuracy of each electric energy meter after calibration using the mean value of the initial calibration parameters using the voltage, current, active power, and reactive power of each electric energy meter after calibration using the mean value of the initial calibration parameters and the standard value of voltage, current, active power, and reactive power; Get the accuracy of the first P electric energy meters after using the mean of the initial calibration parameters.

[0011] Furthermore, the accuracy of the first P electric energy meters is judged. When the accuracy of the electric energy meters meets the accuracy setting threshold, the number N of successful average calibrations of the electric energy meters and the average values ​​of the calibration parameters of these N electric energy meters are determined, specifically: The accuracy of the first P electric energy meters is judged. If they all meet the accuracy setting threshold, the initial value of the number of successful mean value calibration of the electric energy meters, N, is set to P; On the contrary, if there are electric energy meters that do not meet the accuracy setting threshold, all electric energy meters whose accuracy does not meet the accuracy setting threshold among the first P electric energy meters are eliminated, and the corresponding calibration parameters are deleted; Calculate the mean of the intermediate calibration parameters of all remaining electric energy meters that meet the accuracy setting threshold and the accuracy of the remaining electric energy meters after using the mean of the intermediate calibration parameters, and determine whether they meet the accuracy setting threshold; If there is any non-compliance, the corresponding electric energy meter and its calibration parameters are eliminated, and the previous step is repeated again until the accuracy of the remaining electric energy meters after using the average of the intermediate calibration parameters meets the accuracy setting threshold, and the loop is exited; The number of electric energy meters that finally remain and meet the accuracy setting threshold and the corresponding intermediate calibration parameter means are used as the final number N of successful electric energy meter mean calibrations and the calibration parameter means of these N electric energy meters.

[0012] Furthermore, based on the calibration parameter mean, the mean calibration is performed on subsequent electric energy meters to be calibrated in sequence, and the accuracy of the latest N electric energy meters with the calibration parameter mean written therein is continuously judged to determine the number C of successful mean calibrations, specifically: Write the mean value of the calibration parameters into the electric energy meter to be calibrated for calibration, and read the voltage, current, power and electricity of the electric energy meter to be calibrated after the mean calibration; Determine the accuracy of the electric energy meter after mean calibration by using the voltage, current, power, and electric quantity of the electric energy meter to be calibrated after mean calibration and the voltage standard value, current standard value, active power standard value, and reactive power standard value; Determine whether the accuracy of the electric energy meter to be calibrated meets the accuracy setting threshold after the mean calibration is performed; If it meets the requirements, the mean calibration is successful, and the Nth electric energy meter accuracy flag is judged to be True. If so, the value of the Nth electric energy meter accuracy flag is deleted, the values ​​of the 1st to N-1th electric energy meter accuracy flags are shifted one bit, stored in the 2nd to Nth electric energy meter accuracy flags, and the 1st electric energy meter accuracy flag is set to True; otherwise, the number C of successful mean calibrations is increased by 1, and the same processing is performed on the electric energy meter accuracy flags; If it does not meet the requirements, the mean calibration fails, and the current electric energy meter to be calibrated is recalibrated according to the traditional calibration method, and it is determined whether the accuracy flag of the Nth electric energy meter is True. If so, the number of successful mean calibrations C is reduced by 1, and the value of the accuracy flag of the Nth electric energy meter is deleted. The values ​​of the accuracy flags of the 1st to N-1th electric energy meters are shifted one position and stored in the accuracy flags of the 2nd to Nth electric energy meters, and the accuracy flag of the 1st electric energy meter is set to False; otherwise, the same processing is performed on the accuracy flag of the electric energy meter.

[0013] Furthermore, if the proportion of the number C of successful mean calibrations in the number N of successful mean calibrations of the electric energy meter is less than the set proportion, the number M of successful traditional calibrations of the electric energy meter is reset to zero, and the traditional calibration method is used again to determine the mean value of the calibration parameters, specifically: If the proportion of the number of successful mean calibrations C in the number of successful mean calibrations N of the energy meter is less than the set proportion, the mean parameter flag is set to True, the number of successful traditional calibrations M of the energy meter is cleared, and the traditional calibration method is used again to calibrate the subsequent energy meters to be calibrated in sequence to determine the mean value of the calibration parameters; On the contrary, if the proportion of the number C of successful mean calibrations in the number N of successful mean calibrations of the energy meters is greater than or equal to the set ratio value, the calibration of the current energy meter to be calibrated is terminated and the calibration of the next energy meter to be calibrated is continued.

[0014] According to some embodiments, a second aspect of the present invention provides a computer-readable storage medium.

[0015] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the production calibration method for a three-phase AC electric energy meter with adaptive calibration parameters as described in the first solution.

[0016] According to some embodiments, a third aspect of the present invention provides a computer device.

[0017] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the production calibration method for a three-phase AC electric energy meter with adaptive calibration parameters as described in the first solution are implemented.

[0018] According to some embodiments, a fourth aspect of the present invention provides a computer program product or computer program.

[0019] A computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the steps of the production calibration method for a three-phase AC electric energy meter with adaptive calibration parameters as described in the first embodiment.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The present invention dynamically calculates the mean value of calibration parameters that meet the requirements, writes the mean value of calibration parameters into the electric energy meter and verifies the accuracy of the electric energy meter. At this time, if there are individual electric energy meters whose accuracy does not meet the accuracy setting threshold, they are recalibrated according to the traditional calibration steps, and the ratio of the number of electric energy meters whose accuracy meets the accuracy setting threshold to N among the latest N electric energy meters that have the mean value of calibration parameters written into them is continuously recorded. When the ratio is less than the ratio setting value, the mean value of calibration parameters is readjusted according to the above method. This method eliminates the steps of most electric energy meter calibration by adaptively adjusting the calibration steps and calibration parameters, effectively reducing the time occupied by the calibration steps in production testing, improving production efficiency, and the accuracy of the calibrated electric energy meter meets the accuracy setting threshold. According to the calibration results, the calibration steps and calibration parameters are automatically adjusted to adapt to the new sampling resistor deviation range, effectively reducing the time occupied by the calibration steps in production testing, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1 The present invention is a flow chart of a production calibration method for a three-phase AC electric energy meter with adaptive calibration parameters. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] In the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0027] Example 1 like Figure 1 As shown, this embodiment provides a production calibration method for three-phase AC electric energy meters with adaptive calibration parameters. This embodiment uses the method applied to a server as an example for illustration. It is understandable that the method can also be applied to a terminal, and can also be applied to a system including a terminal, a server, and a server, and is implemented through the interaction between the terminal and the server. The server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network servers, cloud communications, middleware services, domain name services, security services CDN, and big data and artificial intelligence platforms. The terminal can be a smart phone, tablet computer, laptop computer, desktop computer, smart speaker, smart watch, etc., but is not limited to this. The terminal and the server can be directly or indirectly connected by wired or wireless communication, and this application does not limit this. In this embodiment, the method includes the following steps: Perform traditional calibration on all the energy meters to be calibrated in turn; When the number M of successful traditional calibrations of the electric energy meters is equal to the success number threshold P, the average of the initial calibration parameters of the first P successful traditional calibrations of the electric energy meters is calculated; Based on the mean value of the initial calibration parameters, the calibration parameters of the first P electric energy meters that have successfully undergone traditional calibration, and the electrical parameters after traditional calibration, the accuracy of the first P electric energy meters after using the mean value of the initial calibration parameters is calculated; The accuracy of the first P electric energy meters is judged. When the accuracy of the electric energy meters meets the accuracy setting threshold, the number N of electric energy meters that have successfully calibrated their mean values ​​and the mean values ​​of the calibration parameters of these N electric energy meters are determined. Based on the mean value of the calibration parameters, the mean value of the subsequent energy meters to be calibrated is calibrated in sequence, and the accuracy of the latest N energy meters with the mean value of the calibration parameters written is continuously judged to determine the number C of successful mean calibrations; If the proportion of the number C of successful mean calibrations in the number N of successful mean calibrations of the energy meter is less than the set proportion, the number M of successful traditional calibrations of the energy meter is reset to zero, and the traditional calibration method is used again to determine the mean of the calibration parameters.

[0028] Taking a specific three-phase three-wire electricity meter as an example, the known information of the three-phase three-wire electricity meter is as follows: the electricity meter uses the Renergy three-phase electricity metering chip RN7302, with a rated voltage Un=380V, a rated current Ib=20A, a meter constant EC=300, a sampling signal Vu=148mV, Vi=95mV, a frequency fosc=8192000, a standard voltage RMS register value U_standard=26600000, a standard current RMS register value I_standard=12800000, a standard active power register value P1.0=40588379 when the power factor PF=1.0, a standard active power register value P0.5L=20294190 when the power factor PF=0.5L, and HFConst1=HFConst2=HFConst=7640. Where HFConst is the high-frequency pulse constant; the accuracy of the energy meter is required to reach level 1, that is, the error is required to be ≤1%. In the calibration step, set P=100 and Q=90. The specific steps of the production calibration method are as follows: S01.Set mean parameter flag = True; S02. Set the number of successful traditional calibrations of the energy meter M = 0; S03. Perform traditional calibration on all the energy meters to be calibrated in sequence and determine whether the number M of successful traditional calibrations of the energy meters is less than the success number threshold P. If so, execute S04, S05, S06, and S07; if not, execute step S10. Because the number of successful traditional calibrations of the energy meters is initially set to 0, S04, S05, S06, and S07 are executed during the first test. When the number of successful traditional calibrations of the energy meters accumulates to 100, M = 100, and step S10 is executed. It should be noted that the selection of P here is only an example, and other numbers can be selected as the success number threshold P according to specific calibration requirements. S04. Set the rated voltage, rated current, and different power factors of the standard power source and provide them to the energy meter. Read the voltage RMS register, current RMS register, and active power register actually measured by the energy meter. The standard power source is set to a rated voltage output of 380V, a rated current output of 20A, and a power factor of 1.0. The voltage RMS register values ​​of the energy meter are read as UA and UC, and the current RMS register values ​​are read as IA and IC. The rated voltage and rated current of the standard power source remain unchanged. The power factor of the standard power source is set to 0.5L. The active power register values ​​read from the energy meter are PA0.5L and PC0.5L. S05. Calculate calibration parameters, including voltage channel gain, current channel gain, and power phase, and record the calibration parameters; Based on the values ​​read from the voltage RMS register, current RMS register, and active power register of the energy meter, calculate the voltage channel gain: Phase A voltage channel gain - GSUA, Phase C voltage channel gain - GSUC; current channel gain: Phase A current channel gain - GSIA, Phase C current channel gain - GSIC; power phase: Phase A active power phase - PA_PHSL, Phase A reactive power phase - QA_PHSL, Phase C active power phase - PC_PHSL, Phase C reactive power phase - QC_PHSL, and record them. The calibration parameters are calculated according to the following formula: ErrUA=(UA-U_standard) / U_standard UAGain=-ErrUA / (1+ErrUA) If UAGain≥0 GSUA=INT[UAGain*2 15 ] Else UAGain<0 GSUA=INT[2 16 +UAGain*2 15 ] Where ErrUA is the effective value error of phase A voltage; ErrIA=(IA-I_standard) / I_standard; IAGain=-ErrIA / (1+ErrIA); If IAGain≥0 GSIA=INT[IAGain*2 15 ]; Else IAGain<0 GSIA=INT[2 16 +IAGain*2 15 ]; Where ErrIA is the RMS error of phase A current.

[0029] GSUC and GSIC were calculated based on the same method as above.

[0030] ErrPA=(PA0.5L-P0.5L) / P0.5L; Among them, ErrPA is the active power error of phase A caused by the phase error.

[0031] Power phase correction is used, so the formula is used: λA=-ErrPA / 1.732; If λA≥0 PA_PHSL=λA*2 15 ; Else λA<0 PA_PHSL=λA*2 15 +2 16 ; QA_PHSL=PA_PHSL; PC_PHSL and QC_PHSL were calculated using the same method as above.

[0032] S06. Calibration parameters are written to the energy meter; voltage channel gain, current channel gain, and power phase are written to the voltage channel gain register, current channel gain register, and power phase correction register of the energy meter; S07. Set the standard power source to different voltages, currents, and power factors, and supply it to the energy meter. Read and record the actual measured voltage, current, power, and energy. Determine whether the accuracy of the energy meter meets the set accuracy threshold. If so, execute S08 and S09. If not, the test ends and the next energy meter is replaced and the test starts again from S03. It is understandable that the accuracy setting threshold here refers to the national standard that the accuracy of the electric energy meter complies with.

[0033] The power factor of the standard power source is 0.5L, and the rated voltage is 380V. The current output of the standard power source is set to 5% of the rated value, that is, 1A. The single-phase active power PA actually measured by the energy meter is read. 校准后 、PC 校准后 190W±1%, single-phase reactive power QA 校准后 , QC 校准后 If the value is 329.09W±1%, record it and continue the next test. Otherwise, the accuracy of this energy meter does not meet the accuracy setting threshold, the test fails, and the next energy meter is replaced and the test starts from S03. The standard power source sets the current output to the rated value of 20A and reads the single-phase active power PA actually measured by the energy meter. 校准后 、PC 校准后 3800W±1%, single-phase reactive power QA校准后 , QC 校准后 If the value is 6581.79W±1%, record it and continue the next test. Otherwise, the accuracy of this energy meter does not meet the accuracy setting threshold, the test fails, and the next energy meter is replaced and the test starts from S03. The standard power source sets the power factor to 1.0, sets the voltage output to 90% of the rated value, i.e. 342V, and reads the actual voltage UA measured by the energy meter. 校准后 UC 校准后 If it is 342V±1%, record it and continue the next test. Otherwise, the accuracy of this energy meter does not meet the accuracy setting threshold, the test fails, and the next energy meter is replaced and the test starts from S03. The standard power source sets the voltage output to 110% of the rated value, i.e. 418V, and reads the actual voltage UA measured by the energy meter. 校准后 UC 校准后 If it is 418V±1%, record it and continue the next test. Otherwise, the accuracy of this energy meter does not meet the accuracy setting threshold, the test fails, and the next energy meter is replaced and the test starts from S03. The standard power source sets the voltage output to the rated value of 380V and reads the actual measured voltage UA of the energy meter. 校准后 UC 校准后 If it is 380V±1%, record it and continue the next test. Otherwise, the accuracy of this energy meter does not meet the accuracy setting threshold, the test fails, and the next energy meter is replaced and the test starts from S03. The standard power source sets the current output to 5% of the rated value, i.e. 1A, and reads the actual current IA measured by the energy meter. 校准后 、IC 校准后 1A±1%, single-phase active power PA 校准后 、PC 校准后 If it is 380W±1%, record it and continue the next test. Otherwise, the accuracy of this energy meter does not meet the accuracy setting threshold, the test fails, and the next energy meter is replaced and the test starts from S03. The standard power source sets the current output to 50% of the rated value, i.e. 10A, and reads the actual current IA measured by the energy meter. 校准后 、IC 校准后 10A±1%, single-phase active power PA 校准后 、PC 校准后 If it is 3800W±1%, record it and continue the next test. Otherwise, the accuracy of this energy meter does not meet the accuracy setting threshold, the test fails, and the next energy meter is replaced and the test starts from S03. The standard power source sets the current output to the rated value of 20A and reads the actual current IA measured by the energy meter. 校准后 、IC 校准后20A±1%, single-phase active power PA 校准后 、PC 校准后 If it is 7600W±1%, record it and continue the next test. Otherwise, the accuracy of this energy meter does not meet the accuracy setting threshold, the test fails, and the next energy meter is replaced and the test starts from S03. Set the energy meter's energy value to 0kWh. One minute later, if the energy meter's energy value is 0.2533±1%kWh, execute S08 and S09. Otherwise, the meter's accuracy does not meet the set accuracy threshold, and the test fails. Replace the next meter and start the test from S03. S08. Set the number of successful traditional calibrations of the energy meter to increase by 1; S09. Set M = the number of successful traditional calibrations of the energy meter. The test ends and the next energy meter is replaced and the test starts from S03. S10. Determine whether the mean parameter flag is equal to True. If so, execute steps S11, S12, S13, and S14. If not, execute steps S17 and S18. S11. Set mean parameter flag = False; S12. Calculate the mean of the calibration parameters; Among them, when it is executed for the first time, when the number M of successful traditional calibrations of the electric energy meters is equal to the success number threshold P, this step is to calculate the initial calibration parameter averages of the first P electric energy meters that have successfully undergone traditional calibration. The calculated initial calibration parameter averages include the initial voltage channel gain averages GSUA_avg and GSUC_avg, the initial current channel gain averages GSIA_avg and GSIC_avg, and the initial power phase averages PA_PHSL_avg, QA_PHSL_avg, PC_PHSL_avg, and QC_PHSL_avg. When this step is repeated again, the mean values ​​of the corresponding number of intermediate calibration parameters are calculated. For example, after executing step S14, if step S12 is repeated again, the mean values ​​of the intermediate calibration parameters corresponding to the remaining electricity meters that meet the accuracy setting threshold are calculated here.

[0034] For example, when executing for the first time, M=P=100; after steps S13 and S14, M may decrease; S13 calculates the accuracy of the energy meter using the mean of the calibration parameters determined in step 12; When the method is first executed, the calibration parameters of the first P traditionally calibrated energy meters and the calibrated voltage, current, active power, reactive power, and the average of the initial calibration parameters are used to calculate the accuracy of the first P energy meters after using the average of the initial calibration parameters. When the process is executed again, the accuracy calculation is performed using the data of the remaining energy meters that meet the accuracy setting threshold.

[0035] The following describes this step using the first execution as an example: Determine the voltage, current, active power, and reactive power of each electric energy meter before traditional calibration using the voltage, current, active power, and reactive power of each electric energy meter after traditional calibration and the corresponding calibration parameters; Known formula: If UAGain≥0 GSUA=INT[UAGain*2 15 ] Else UAGain<0 GSUA=INT[2 16 +UAGain*2 15 ] If IAGain≥0 GSIA=INT[IAGain*2 15 ] Else IAGain<0 GSIA=INT[2 16 +IAGain*2 15 ] According to the statistical data during the actual test, the three-phase three-wire energy meter in this example has UAGain>0 and IAGain<0. therefore: UAGain=GSUA / 2 15 IAGain=(GSIA-2 16 ) / 2 15 Known formula: UA 校准后 =UA 校准前 *(1+UAGain) IA 校准后 =IA 校准前 *(1+IAGain) PA 校准后 =PA 校准前 +PA_PHSL*QA 校准前 QA 校准后 =QA 校准前 -QA_PHSL*PA 校准前 Among them, UA 校准后 It is the A-phase voltage actually measured after the electric energy meter is calibrated according to the traditional calibration method, UA 校准前 IA is the actual measured A-phase voltage before the energy meter is calibrated. 校准后 It is the A-phase current actually measured after the electric energy meter is calibrated according to the traditional calibration method, IA校准前 is the A-phase current actually measured before the energy meter is calibrated, PA 校准后 It is the active power of phase A actually measured after the electric energy meter is calibrated according to the traditional calibration method, PA 校准前 QA is the active power of phase A actually measured before the energy meter is calibrated. 校准前 QA is the reactive power of phase A actually measured before the energy meter is calibrated. 校准后 It is the reactive power of phase A actually measured after the electric energy meter is calibrated using the traditional calibration method.

[0036] therefore: UA 校准前 =UA 校准后 / (1+GSUA / 2 15 ) IA 校准前 =IA 校准后 / (1+(GSIA-2 16 ) / 2 15 ) PA 校准前 =(PA 校准后 -PA_PHSL*QA 校准后 ) / (1+PA_PHSL*QA_PHSL) QA 校准前 =(QA 校准后 +QA_PHSL*PA 校准后 ) / (1+PA_PHSL*QA_PHSL) Description: GSUA, GSIA, PA_PHSL, QA_PHSL, UA 校准后 IA 校准后 、PA 校准后 , QA 校准后 It is the known data recorded during the previous test; The same method is used to calculate UC 校准前 -The C phase voltage and IC actually measured before the energy meter is calibrated 校准前 -The C phase current and PC actually measured before the energy meter is calibrated 校准前 -The actual measured C-phase active power, QC 校准前 -The actual measured reactive power of phase C before the energy meter is calibrated.

[0037] At this time, the voltage, current, active power and reactive power of each electric energy meter before calibration are calculated; Using the initial calibration parameter mean and the voltage, current, active power, and reactive power of each electric energy meter before traditional calibration, the voltage, current, active power, and reactive power of each electric energy meter after calibration using the initial calibration parameter mean are obtained; Using the initial voltage channel gain average GSUA_avg, GSUC_avg, the initial current channel gain average GSIA_avg, GSIC_avg, the initial power phase average PA_PHSL_avg, QA_PHSL_avg, PC_PHSL_avg, QC_PHSL_avg and the voltage, current, active power and reactive power before calibration, the voltage, current, active power and reactive power after calibration using the initial calibration parameter average can be obtained: UA 均值校准后 =UA 校准前 *(1+GSUA_avg / 2 15 ) IA 均值校准后 =IA 校准前 *(1+(GSIA_avg-2 16 ) / 2 15 ) PA 均值校准后 =PA 校准前 +PA_PHSL_avg*QA 校准前 QA 均值校准后 =QA 校准前 -QA_PHSL_avg*PA 校准前 The accuracy of each electric energy meter after calibration using the mean value of the initial calibration parameters is determined by using the voltage, current, active power, and reactive power of each electric energy meter after calibration using the mean value of the initial calibration parameters, and the standard values ​​of voltage, current, active power, and reactive power. That is, the error of the electric energy meter after calibration using the mean value of the initial calibration parameters can be obtained: ErrUA 均值 =(UA 均值校准后 -UA 标准值 ) / UA 标准值 ErrIA 均值 =(IA 均值校准后 -IA 标准值 ) / IA 标准值 ErrPA 均值 =(PA 均值校准后 -PA 标准值 ) / PA 标准值 ErrQA 均值 =(QA 均值校准后 -QA 标准值 ) / QA 标准值 Among them, UA 均值校准后 IA is the actual measured phase A voltage after the energy meter writes the initial calibration parameter mean value. 均值校准后It is the actual measured A phase current after the energy meter writes the initial calibration parameter mean value, PA 均值校准后 QA is the actual measured active power of phase A after the energy meter writes the initial calibration parameter mean value. 均值校准后 ErrUA is the actual measured reactive power of phase A after the energy meter writes the initial calibration parameter mean value. 均值 It is the effective value error of phase A voltage after the energy meter writes the initial calibration parameter mean value, UA 标准值 Is the voltage standard value, ErrIA 均值 IA is the effective value error of phase A current after the energy meter writes the initial calibration parameter mean value. 标准值 Is the current standard value, ErrPA 均值 It is the active power error of phase A caused by the phase error after the energy meter writes the initial calibration parameter mean value, PA 标准值 Is the standard value of active power, ErrQA 均值 It is the reactive power error caused by the phase error of phase A after the energy meter writes the initial calibration parameter mean value, QA 标准值 It is the standard value of reactive power.

[0038] The same method is used to calculate ErrUC 均值 ,-The C phase voltage effective value error after the energy meter writes the initial calibration parameter mean, ErrIC 均值 - After the energy meter writes the initial calibration parameter mean value, the C phase current effective value error, ErrPC 均值 -After the energy meter writes the initial calibration parameter mean value, the active power error and ErrQC caused by the phase error in phase C 均值 -The reactive power error of phase C caused by the phase error after the energy meter writes the initial calibration parameter mean value.

[0039] S14. Determine whether the accuracy of all electricity meters meets the accuracy setting threshold; Among them, when it is executed for the first time, it is determined whether the accuracy of all the first P electric energy meters meets the accuracy setting threshold. If so, the number of successful average calibration of the electric energy meters N=P is set, and steps S15, S16, S17, and S18 are executed. If not, the calibration parameters of all electric energy meters whose accuracy does not meet the accuracy setting threshold among the first P electric energy meters are deleted, and the number of successful average calibration of the electric energy meters N=P-the number of electric energy meters whose accuracy does not meet the accuracy setting threshold is set, and steps S12, S13, and S14 are executed; When the process is executed again, the average value of the calibration parameters of the electric energy meter whose remaining accuracy meets the accuracy setting threshold is calculated again, and then the corresponding accuracy is judged to be in compliance with the accuracy setting threshold. If there is any non-compliance, the corresponding electricity meter and its calibration parameters are eliminated, and steps S12, S13, and S14 are repeated again until the accuracy of the remaining electricity meters after using the average of the intermediate calibration parameters meets the accuracy setting threshold, and then the loop is exited and steps S15, S16, S17, and S18 are entered.

[0040] After exiting the loop, N = the number of remaining energy meters that meet the accuracy setting threshold.

[0041] The following takes the first execution as an example to illustrate the specific process of this step: Determine whether the accuracy of all the first P electric energy meters meets the accuracy setting threshold, that is, determine ErrUA 均值 ≤1% and ErrIA 均值 ≤1% and ErrPA 均值 ≤1% and ErrQA 均值 ≤1% and ErrUC 均值 ≤1% and ErrIC 均值 ≤1% and ErrPC 均值 ≤1% and ErrQC 均值 ≤1%. If so, set the number of successful mean calibration of the energy meters N=P, and execute S15, S16, S17, and S18. If not, delete the calibration parameters of all energy meters whose accuracy does not meet the accuracy setting threshold in the first P energy meters, set N=P-the number of all energy meters whose accuracy does not meet the accuracy setting threshold, and execute steps S12, S13, and S14. If the accuracy of the first 100 energy meters meets the accuracy setting threshold, the number of successful energy meter mean calibration N=P=100 is set; If the accuracy of two of the first 100 electric energy meters does not meet the accuracy setting threshold, the calibration parameters of these two electric energy meters are deleted, N=100-2=98 is set, and steps S12, S13, and S14 are executed. The calculation is repeated until the accuracy of the remaining N electric energy meters meets the accuracy setting threshold, and then steps S15, S16, S17, and S18 are executed. Assuming that the accuracy of all remaining electric energy meters meets the accuracy setting threshold, N=95; S15. For the remaining electric energy meters that meet the accuracy setting threshold, set their electric energy meter accuracy flags to True.

[0042] Set the first electric energy meter accuracy flag = True, set the second electric energy meter accuracy flag = True, ..., set the Nth electric energy meter accuracy flag = True; If the result of the first execution is that the accuracy of P electricity meters all meets the accuracy setting threshold, then N=P; On the contrary, if the result of the first execution is that the accuracy of two electricity meters does not meet the accuracy setting threshold, then N here = P-2.

[0043] S16. Set the number of successful mean calibrations of the energy meters to N, and obtain the mean values ​​of the calibration parameters of these N energy meters; here, based on the previous example, N = 95; S17. The calibration parameter mean is written to the energy meter; the voltage channel gain mean, the current channel gain mean, and the power phase mean are written to the voltage channel gain register, the current channel gain register, and the power phase correction register of the energy meter; S18. Set the standard power source to different voltages, currents, and power factors, and provide them to the energy meter. Read the actual measured voltage, current, power, and power of the energy meter, and determine whether the accuracy of the energy meter meets the set accuracy threshold. If so, execute S19. If not, execute steps S22, S23, S24, and S25. If it meets the requirements, the mean calibration is successful, and the Nth electric energy meter accuracy flag is judged to be True. If so, the value of the Nth electric energy meter accuracy flag is deleted, the values ​​of the 1st to N-1th electric energy meter accuracy flags are shifted one bit, stored in the 2nd to Nth electric energy meter accuracy flags, and the 1st electric energy meter accuracy flag is set to True; otherwise, the number C of successful mean calibrations is increased by 1, and the same processing is performed on the electric energy meter accuracy flags; If it does not meet the requirements, the mean calibration fails, and the current electric energy meter to be calibrated is recalibrated according to the traditional calibration method, and it is determined whether the accuracy flag of the Nth electric energy meter is True. If so, the number of successful mean calibrations C is reduced by 1, and the value of the accuracy flag of the Nth electric energy meter is deleted. The values ​​of the accuracy flags of the 1st to N-1th electric energy meters are shifted one position and stored in the accuracy flags of the 2nd to Nth electric energy meters, and the accuracy flag of the 1st electric energy meter is set to False; otherwise, the same processing is performed on the accuracy flag of the electric energy meter.

[0044] The standard power source is set to a power factor of 0.5L, a voltage output of 380V, and a current output of 5% of the rated value, i.e., 1A. If the single-phase active power actually measured by the electric energy meter is 190W±1% and the single-phase reactive power is 329.09W±1%, then the following test is continued. Otherwise, the accuracy of this electric energy meter does not meet the accuracy setting threshold, and steps S22, S23, S24, and S25 are executed. The standard power source is set to a rated current output of 20A. If the single-phase active power actually measured by the electric energy meter is 3800W±1% and the single-phase reactive power is 6581.79W±1%, the following test is continued. Otherwise, the accuracy of this electric energy meter does not meet the accuracy setting threshold, and steps S22, S23, S24, and S25 are executed. The power factor of the standard power source is set to 1.0, and the voltage output is set to 90% of the rated value, that is, 342V. If the voltage actually measured by the electric energy meter is 342V±1%, the following test is continued. Otherwise, the accuracy of this electric energy meter does not meet the accuracy setting threshold, and steps S22, S23, S24, and S25 are executed. The standard power source is set to output voltage 110% of the rated value, i.e., 418V. If the voltage actually measured by the electric energy meter is 418V±1%, the following test is continued. Otherwise, the accuracy of the electric energy meter does not meet the accuracy setting threshold, and steps S22, S23, S24, and S25 are executed. The standard power source is set to output a rated voltage of 380V. If the voltage actually measured by the electric energy meter is 380V±1%, the following test is continued. Otherwise, the accuracy of the electric energy meter does not meet the accuracy setting threshold, and steps S22, S23, S24, and S25 are executed. The standard power source sets the current output to 5% of the rated value, i.e., 1A. If the current actually measured by the electric energy meter is 1A±1% and the single-phase active power is 380W±1%, then the following test is continued. Otherwise, the accuracy of this electric energy meter does not meet the accuracy setting threshold, and steps S22, S23, S24, and S25 are executed. The standard power source is set to output current of 50% of the rated value, i.e., 10A. If the current actually measured by the electric energy meter is 10A±1% and the single-phase active power is 3800W±1%, the following test is continued. Otherwise, the accuracy of the electric energy meter does not meet the accuracy setting threshold, and steps S22, S23, S24, and S25 are executed. The standard power source is set to a rated current output of 20A. If the current actually measured by the electric energy meter is 20A±1% and the single-phase active power is 7600W±1%, the following test is continued. Otherwise, the accuracy of the electric energy meter does not meet the accuracy setting threshold, and steps S22, S23, S24, and S25 are executed. Set the energy value of the energy meter to 0kWh. After 1 minute, if the energy value of the energy meter is 0.2533±1%kWh, execute S19. Otherwise, the accuracy of the energy meter does not meet the accuracy setting threshold, execute steps S22, S23, S24, and S25. S19. Determine whether the Nth (95)th electric energy meter accuracy flag is equal to True, if so, execute S21, S29, if not, execute steps S20, S21, S29; S20. Set the number of successful mean calibrations, C, to increase by 1; S21. Set the Nth energy meter accuracy flag = the N-1th energy meter accuracy flag, ..., set the second energy meter accuracy flag = the first energy meter accuracy flag, set the first energy meter accuracy flag = True; That is, the first energy meter accuracy flag is set to True, and the accuracy flags of the remaining energy meters are moved back by one variable, so that the 95 energy meter accuracy flag variables can store the latest 95 energy meter accuracy flags at any time; S22. The standard power source sets the rated voltage, rated current, and different power factors, and provides them to the energy meter. The voltage RMS register, current RMS register, and active power register actually measured by the energy meter are read. The standard power source is set to a rated voltage output of 380V, a rated current output of 20A, and a power factor of 1.0. The voltage RMS register values ​​of the energy meter are read as UA and UC, and the current RMS register values ​​are read as IA and IC. The rated voltage and rated current of the standard power source remain unchanged. The power factor of the standard power source is set to 0.5L. The active power register values ​​read from the energy meter are PA0.5L and PC0.5L. S23. Calculate the calibration parameters, including voltage channel gain, current channel gain, and power phase, based on the values ​​read from the voltage RMS register, current RMS register, and active power register of the energy meter; refer to step S05 for the calculation formula; S24. Calibration parameters are written into the energy meter; S25. Set different voltages, currents, and power factors of the standard power source and provide them to the energy meter. Read the actual voltage, current, power, and power measured by the energy meter to determine whether the accuracy of the energy meter meets the set accuracy threshold. If yes or no, execute S26. The power factor of the standard power source remains at 0.5L, and the rated voltage remains at 380V. The current output of the standard power source is set to 5% of the rated value, that is, 1A. The single-phase active power actually measured by the energy meter is 190W±1%, and the single-phase reactive power is 329.09W±1%. Continue with the following test. Otherwise, the accuracy of this energy meter does not meet the set accuracy threshold, and execute S26. Set the current output of the standard power source to a rated value of 20A. If the single-phase active power actually measured by the electric energy meter is 3800W±1% and the single-phase reactive power is 6581.79W±1%, continue with the following test. Otherwise, the accuracy of this electric energy meter does not meet the accuracy setting threshold, and execute S26. The power factor of the standard power source is set to 1.0, and the voltage output is set to 90% of the rated value, that is, 342V. If the actual voltage measured by the electric energy meter is 342V±1%, the following test is continued. Otherwise, the accuracy of the electric energy meter does not meet the accuracy setting threshold, and S26 is executed. The standard power source is set to output voltage 110% of the rated value, i.e., 418V. If the voltage actually measured by the electric energy meter is 418V±1%, the following test is continued. Otherwise, the accuracy of the electric energy meter does not meet the accuracy setting threshold, and S26 is executed. The standard power source is set to a rated voltage of 380 V. If the voltage actually measured by the electric energy meter is 380 V ± 1%, the following test is continued. Otherwise, the accuracy of the electric energy meter does not meet the accuracy setting threshold, and S26 is executed. The standard power source is set to output current of 5% of the rated value, i.e., 1A. If the current actually measured by the energy meter is 1A±1% and the single-phase active power is 380W±1%, the following test is continued. Otherwise, the accuracy of the energy meter does not meet the accuracy setting threshold, and S26 is executed. The standard power source is set to output current 50% of the rated value, i.e., 10A. If the current actually measured by the energy meter is 10A±1% and the single-phase active power is 3800W±1%, the following test is continued. Otherwise, the accuracy of the energy meter does not meet the accuracy setting threshold, and S26 is executed. The standard power source is set to a rated current output of 20A. If the current actually measured by the energy meter is 20A±1% and the single-phase active power is 7600W±1%, the following test is continued. Otherwise, the accuracy of the energy meter does not meet the accuracy setting threshold, and S26 is executed. Set the energy meter's energy value to 0 kWh. One minute later, if the energy meter's energy value is 0.2533 ± 1% kWh, execute S26. Otherwise, the meter's accuracy does not meet the accuracy setting threshold, and execute S26. S26. Determine whether the Nth energy meter accuracy flag is equal to True. If so, execute S27, S28, and S29. If not, execute steps S28 and S29. S27. Set the number of successful mean calibrations, C, minus 1; S28. Set the Nth energy meter accuracy flag = N-1th energy meter accuracy flag, ..., set the second energy meter accuracy flag = the first energy meter accuracy flag, set the first energy meter accuracy flag = False; That is, the first energy meter accuracy flag is set to False, and the accuracy flags of the remaining energy meters are moved back by one variable, so that the 95 energy meter accuracy flag variables can store the latest 95 energy meter accuracy flags at any time; S29. Determine whether the ratio of the number of successful mean calibrations C to N is less than the ratio setting value Q%. If so, set the mean parameter flag = True, set the number of successful traditional calibrations of the electricity meter = 0, the test ends, replace the next electricity meter and start the test from S03. If not, the test ends, replace the next electricity meter and start the test from S03.

[0045] This step is to determine whether the mean value of the energy meter calibration parameters is still suitable for subsequent energy meter calibration. If the calibration success rate is less than 90%, it is not suitable and recalculate according to the above calibration steps.

[0046] Theoretical analysis 1,000 three-phase AC energy meters were calibrated and verified using traditional calibration methods. This involves supplying the rated voltage, rated current, and various power factors to the meters using a standard power source. The voltage RMS register, current RMS register, and active power register are then read. Based on the collected data, the voltage channel gain, current channel gain, and power phase are calculated and recorded. Then, a standard power source is supplied with various voltages, currents, and power factors. The voltage, current, power, and energy values ​​measured by the meters are read and recorded to determine whether the meters meet the set accuracy thresholds.

[0047] For all three-phase AC energy meters whose accuracy meets the set accuracy threshold, calculate the calibration parameter mean, including the voltage channel gain mean, the current channel gain mean, and the power phase mean.

[0048] For all three-phase AC energy meters whose accuracy met the set accuracy threshold, we used the recorded calibration parameters and the calibrated voltage, current, active power, reactive power, and average voltage channel gain, current channel gain, and power phase values ​​to calculate the meter's accuracy using the average calibration parameters. The calculation results showed that the percentage of energy meters meeting the set accuracy threshold exceeded 99%.

[0049] Practice has proven The mean calibration parameter value was directly written into the voltage channel gain register, current channel gain register, and power phase correction register of another 1,000 three-phase AC energy meters. Actual testing verified that over 97% of these 1,000 three-phase AC energy meters met the set accuracy threshold. This indicates that the mean calibration parameter value ensures that the accuracy of the vast majority of three-phase AC energy meters meets the set accuracy threshold.

[0050] Example 2 This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the steps of the production calibration method for a three-phase AC electric energy meter with adaptive calibration parameters as described in the first embodiment above are implemented.

[0051] Example 3 This embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps in the method for producing and calibrating a three-phase AC electric energy meter with adaptive calibration parameters as described in the first embodiment above are implemented.

[0052] Example 4 This embodiment provides a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the steps of the production calibration method for a three-phase AC electric energy meter with adaptive calibration parameters described in the first embodiment.

[0053] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0054] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0055] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0056] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0057] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0058] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A production calibration method for three-phase AC electric energy meters with adaptive calibration parameters, characterized in that: include: Perform traditional calibration on all the energy meters to be calibrated in turn; When the number M of successful traditional calibrations of the electric energy meters is equal to the success number threshold P, the average of the initial calibration parameters of the first P successful traditional calibrations of the electric energy meters is calculated; Based on the mean value of the initial calibration parameters, the calibration parameters of the first P electric energy meters that have successfully undergone traditional calibration, and the electrical parameters after traditional calibration, the accuracy of the first P electric energy meters after using the mean value of the initial calibration parameters is calculated; The accuracy of the first P electric energy meters is judged. When the accuracy of the electric energy meters meets the accuracy setting threshold, the number N of electric energy meters that have successfully calibrated their mean values ​​and the mean values ​​of the calibration parameters of these N electric energy meters are determined. Based on the mean value of the calibration parameters, the mean value of the subsequent energy meters to be calibrated is calibrated in sequence, and the accuracy of the latest N energy meters with the mean value of the calibration parameters written is continuously judged to determine the number C of successful mean calibrations; If the proportion of the number C of successful mean calibrations in the number N of successful mean calibrations of the energy meter is less than the set proportion, the number M of successful traditional calibrations of the energy meter is reset to zero, and the traditional calibration method is used again to determine the mean of the calibration parameters.

2. The method for producing and calibrating a three-phase AC electric energy meter with adaptive calibration parameters according to claim 1, characterized in that: Perform traditional calibration on all the energy meters to be calibrated in turn, specifically: The standard power source sets the rated voltage, rated current, and different power factors, and provides them to the energy meter, which reads the voltage RMS register, current RMS register, and active power register actually measured by the energy meter; Calculate calibration parameters, including voltage channel gain, current channel gain, power phase, and record the calibration parameters; Calibration parameters are written into the energy meter; The standard power source is set with different voltages, currents and power factors and provided to the energy meter. The voltage, current, power and amount actually measured by the energy meter are read and recorded.

3. The method for producing and calibrating a three-phase AC electric energy meter with adaptive calibration parameters according to claim 1, wherein: When the number M of successful traditional calibrations of the electric energy meters is equal to the success number threshold P, the average of the initial calibration parameters of the first P successful traditional calibrations of the electric energy meters is calculated, specifically: When the number of successful traditional calibrations M is equal to the success number threshold P, the average of the initial calibration parameters of the first P successful traditional calibrations of the electric energy meters is calculated; The initial calibration parameter mean values ​​include an initial voltage channel gain mean value, an initial current channel gain mean value, and an initial power phase mean value.

4. The method for producing and calibrating a three-phase AC electric energy meter with adaptive calibration parameters according to claim 1, wherein: The accuracy of the first P electric energy meters after using the initial calibration parameter mean is calculated based on the initial calibration parameter mean, the calibration parameters of the first P electric energy meters that have successfully undergone traditional calibration, and the electrical parameters after traditional calibration. Specifically, the accuracy of the first P electric energy meters after using the initial calibration parameter mean is calculated as follows: Determine the voltage, current, active power, and reactive power of each electric energy meter before traditional calibration using the voltage, current, active power, and reactive power of each electric energy meter after traditional calibration and the corresponding calibration parameters; Using the initial calibration parameter mean and the voltage, current, active power, and reactive power of each electric energy meter before traditional calibration, the voltage, current, active power, and reactive power of each electric energy meter after calibration using the initial calibration parameter mean are obtained; Determine the accuracy of each electric energy meter after calibration using the mean value of the initial calibration parameters using the voltage, current, active power, and reactive power of each electric energy meter after calibration using the mean value of the initial calibration parameters and the standard value of voltage, current, active power, and reactive power; Get the accuracy of the first P electric energy meters after using the mean of the initial calibration parameters.

5. The production calibration method of a three-phase AC electric energy meter with adaptive calibration parameters according to claim 1, characterized in that: The accuracy of the first P electric energy meters is judged. When the accuracy of the electric energy meters meets the accuracy setting threshold, the number N of successful average calibrations of the electric energy meters and the average values ​​of the calibration parameters of the N electric energy meters are determined. Specifically, The accuracy of the first P electric energy meters is judged. If they all meet the accuracy setting threshold, the initial value of the number of successful mean value calibration of the electric energy meters, N, is set to P; On the contrary, if there are electric energy meters that do not meet the accuracy setting threshold, all electric energy meters whose accuracy does not meet the accuracy setting threshold among the first P electric energy meters are eliminated, and the corresponding calibration parameters are deleted; Calculate the mean of the intermediate calibration parameters of all remaining electric energy meters that meet the accuracy setting threshold and the accuracy of the remaining electric energy meters after using the mean of the intermediate calibration parameters, and determine whether they meet the accuracy setting threshold; If there is any non-compliance, the corresponding electric energy meter and its calibration parameters are eliminated, and the previous step is repeated again until the accuracy of the remaining electric energy meters after using the average of the intermediate calibration parameters meets the accuracy setting threshold, and the loop is exited; The number of electric energy meters that finally remain and meet the accuracy setting threshold and the corresponding intermediate calibration parameter means are used as the final number N of successful electric energy meter mean calibrations and the calibration parameter means of these N electric energy meters.

6. The method for producing and calibrating a three-phase AC electric energy meter with adaptive calibration parameters according to claim 1, wherein: Based on the calibration parameter mean, mean calibration is performed on subsequent electric energy meters to be calibrated in sequence, and the accuracy of the latest N electric energy meters with the calibration parameter mean values ​​written therein is continuously judged to determine the number C of successful mean calibrations, specifically: Write the mean value of the calibration parameters into the electric energy meter to be calibrated for calibration, and read the voltage, current, power and electricity of the electric energy meter to be calibrated after the mean calibration; Determine the accuracy of the electric energy meter after mean calibration by using the voltage, current, power, and electric quantity of the electric energy meter to be calibrated after mean calibration and the voltage standard value, current standard value, active power standard value, and reactive power standard value; Determine whether the accuracy of the electric energy meter to be calibrated meets the accuracy setting threshold after the mean calibration is performed; If it meets the requirements, the mean calibration is successful, and the Nth electric energy meter accuracy flag is judged to be True. If so, the value of the Nth electric energy meter accuracy flag is deleted, the values ​​of the 1st to N-1th electric energy meter accuracy flags are shifted one bit, stored in the 2nd to Nth electric energy meter accuracy flags, and the 1st electric energy meter accuracy flag is set to True; otherwise, the number C of successful mean calibrations is increased by 1, and the same processing is performed on the electric energy meter accuracy flags; If it does not meet the requirements, the mean calibration fails, and the current electric energy meter to be calibrated is recalibrated according to the traditional calibration method, and it is determined whether the accuracy flag of the Nth electric energy meter is True. If so, the number of successful mean calibrations C is reduced by 1, and the value of the accuracy flag of the Nth electric energy meter is deleted. The values ​​of the accuracy flags of the 1st to N-1th electric energy meters are shifted one position and stored in the accuracy flags of the 2nd to Nth electric energy meters, and the accuracy flag of the 1st electric energy meter is set to False; otherwise, the same processing is performed on the accuracy flag of the electric energy meter.

7. The method for producing and calibrating a three-phase AC electric energy meter with adaptive calibration parameters according to claim 1, wherein: If the proportion of the number C of successful mean calibrations in the number N of successful mean calibrations of the electric energy meter is less than the set proportion, the number M of successful traditional calibrations of the electric energy meter is reset to zero, and the traditional calibration method is used again to determine the mean value of the calibration parameters, specifically: If the proportion of the number of successful mean calibrations C in the number of successful mean calibrations N of the energy meter is less than the set proportion, the mean parameter flag is set to True, the number of successful traditional calibrations M of the energy meter is cleared, and the traditional calibration method is used again to calibrate the subsequent energy meters to be calibrated in sequence to determine the mean value of the calibration parameters; On the contrary, if the proportion of the number C of successful mean calibrations in the number N of successful mean calibrations of the energy meters is greater than or equal to the set ratio value, the calibration of the current energy meter to be calibrated is terminated and the calibration of the next energy meter to be calibrated is continued.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the production calibration method of a three-phase AC electric energy meter with adaptive calibration parameters as described in any one of claims 1 to 7 are implemented.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the production calibration method of a three-phase AC electric energy meter with adaptive calibration parameters as described in any one of claims 1 to 7 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the computer program implements the steps in the production calibration method of a three-phase AC electric energy meter with adaptive calibration parameters according to any one of claims 1 to 7.

Images