Power-on detection method for electric power meter production

Abstract

The invention discloses a power-on detection method for production of an electric power meter, and relates to the technical field of power-on detection, voltage data is detected and collected by using a voltage measurement module according to the total amount n of voltage detection points, and input current DLin / output current DLout is respectively detected at the input end and the output end of the electric power meter by using a current measurement module. And detecting the total quantity m of current detection points in the electric power meter, collecting current data, and calculating an output voltage stability evaluation value DY, a current efficiency evaluation value DL, an input current comprehensive performance index ZDXin / an output current comprehensive performance index ZDXout in sequence by using a data processing and analyzing module, according to the method, the voltage stability is comprehensively evaluated, the current efficiency is accurately evaluated, the comprehensive performance is evaluated and optimized, and the evaluation system not only is beneficial to understanding the performance expression for electric power meter production, but also is beneficial to improving the production efficiency of the electric power meter. And important basis and direction are provided for optimization of the electric power meter.

Description

Technical Field

[0001] The invention relates to the technical field of power-on detection, and in particular to a power-on detection method for electric power meter production. Background Art

[0002] With the vigorous development of the power industry, power meters, as an important part of the power system, the stability and accuracy of their performance are directly related to the safe and reliable operation of the power system. Therefore, higher and higher requirements are placed on the production quality of power meters. In order to ensure that power meters can work stably in a complex and changeable power environment, they need to be strictly powered on during production inspection.

[0003] Although power-on detection technology has been widely used in power meter production, there are still some problems and shortcomings.

[0004] Specifically, existing power-on detection technologies often only focus on the absolute value of voltage and ignore voltage fluctuations, which causes some power meters to have degraded performance when voltage fluctuates greatly. However, traditional detection methods cannot accurately capture this problem. In addition, when evaluating current efficiency, existing technologies often only consider the ratio of input current to output current, while ignoring the impact of voltage stability on current efficiency. This results in inaccurate evaluation results that cannot truly reflect the performance of the power meter. In addition, existing technologies lack a comprehensive performance evaluation indicator that can comprehensively consider voltage stability, current efficiency, and current fluctuation factors. This makes it difficult to fully grasp the performance of power meters during their production process, and the optimization direction is unclear. Summary of the invention

[0005] The purpose of the present invention is to provide a power-on detection method for electric power meter production, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution, and the specific implementation steps are as follows: Step 1: Using the voltage measurement module, collect voltage data according to the total amount n of voltage detection points; Step 2: Use the current measurement module to measure the input current DL at the input and output of the power meter. in Output current DL out The current data is collected by detecting the total current detection points m inside the power meter; Step 3: Use the data processing and analysis module, input the voltage data and current data, and calculate the output voltage stability evaluation value DY, the current efficiency evaluation value DL, and the input current comprehensive performance index ZDX in turn. in / Output current comprehensive performance index ZDX out ; Step 4: The current input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Compared with the previous input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Perform comparison, detection and adjustment respectively, and feed back the adjusted parameters to the voltage measurement module and the current measurement module for re-detection and calculation; The data processing and analysis module includes a unit for evaluating the voltage fluctuation of the power meter after it is powered on, a unit for reflecting the efficiency of the power meter when it is converted into electric energy, and a unit for comprehensively evaluating the overall performance of the power meter; The power meter inputs the current DL in Output current DL out The separate detection is reflected in the comprehensive evaluation unit of the overall performance of the power meter; The equipment used by the voltage measurement module includes a voltmeter; The equipment used by the current measurement module includes an ammeter; The equipment used by the data processing and analysis module includes a data acquisition and processing system.

[0007] Optionally, the calculation formula of the unit for evaluating the voltage fluctuation after the power meter is powered on is as follows: ; in: DY is the voltage stability assessment value; DY max is the maximum voltage value; DY min is the minimum voltage value; DY avg is the average voltage value; DY avg / 10 is used as a reference for the voltage fluctuation range to evaluate the voltage stability and is compared with DY max -DY min The comparison reflects the relative size of voltage fluctuation.

[0008] The average voltage value DY avg The calculation formula is as follows: DY avg =(DY 1 +DY 2 +DY 3 +......+DY n ) / n; n is the total number of voltage detection points, and n reflects the total number of detection points for voltage detection in the current power-on detection; DY 1 is the voltage value of the first detection point, DY 2 is the voltage value of the second detection point, DY 3 is the voltage value of the third detection point, DY n is the voltage value of the nth detection point; Among them, the maximum voltage value DY max and minimum voltage value DY min For DY 1 , DY 2 , DY 3 ,......,DY n The maximum and minimum voltage values ​​collected in.

[0009] Optionally, the calculation formula reflecting the efficiency unit when the power meter is converted into electric energy is as follows: DL=[(DL out / DL in )×(100 / (1+DY))]-[(DY 1 -DY avg ) / (DY max -DY min )×10]; in: DL is the current efficiency evaluation value; DL out is the output current; DL in is the input current; In (100 / (1+DY)), 100 means the order of magnitude adjusted to match the current efficiency percentage; [(DY 1 -DY avg ) / (DY max -DY min )×10], where 10 reflects the influence of enhanced voltage fluctuation on current efficiency evaluation.

[0010] Optionally, the comprehensive evaluation unit for the overall performance of the power meter inputs a current DL in The calculation formula for the detection is as follows: ; in: ZDX in is the comprehensive performance index of input current; DL in，rated is the input rated current; DL in，avg is the average value of input current; DL in，max is the maximum input current value; DL in，min is the minimum input current value; 5 in the figure shows the influence of the enhanced current fluctuation on the comprehensive performance evaluation; The comprehensive evaluation unit for the overall performance of the power meter evaluates the output current DL of the output terminal of the power meter. out The calculation formula for the detection is as follows: ; in: ZDX out is the comprehensive performance index of output current; DL out,rated is the output rated current; DL out,avg is the average output current; DL out,max is the maximum output current value; DL out,min is the minimum output current value.

[0011] Based on the comprehensive evaluation unit of the overall performance of the power meter, the input current DL is calculated. in The average input current DL in，avg The calculation formula is as follows: DL in，avg =(DL in1 +DL in2 +DL in3 +......+DL inm ) / m; m is the total number of current detection points, which reflects the total number of detection points for detecting the current of each detection point input inside the power meter; DL in1 Enter the current value for the first detection point, DL in2 Enter the current value for the second detection point, DL in3 Enter the current value for the third detection point, DL inm Enter the current value for the mth detection point; Calculate the output current DL out The average output current DL out,avg The calculation formula is as follows: DL out,avg =(DL out1 +DL out2 +DL out3 +......+DL outm ) / m; m is the total number of current detection points, which reflects the total number of detection points for detecting the current outputted at each detection point inside the power meter; DLout1 is the output current value of the first detection point, DL out2 The output current value of the second detection point, DL out3 is the output current value of the third detection point, DL outm Output current value of the mth detection point.

[0012] Optionally, the input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out The detection and evaluation process for two consecutive times, namely the current and previous times, is as follows: If the current input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Compared with the previous input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out If the voltage detection range is set unreasonably, the voltage is unstable, and the number and distribution of the total number of voltage detection points n and the total number of input current detection points m should be increased; If the current input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Compared with the previous input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out If there is an improvement, it means that the current stable performance of the power meter can be reflected, and the number and distribution of the total number of voltage detection points n and the total number of current detection points m should be maintained.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can accurately evaluate the voltage stability of the power meter during the power-on process by calculating the unit for evaluating the voltage fluctuation after the power meter is powered on. This method not only introduces the maximum and minimum values ​​of the voltage, but also introduces the average value, maximum value, and minimum value of the voltage at n detection points, thereby more comprehensively reflecting the voltage fluctuation.

[0014] 2. The efficiency unit of the present invention reflects the conversion of the power meter into electric energy and combines the voltage stability evaluation value DY and the first detection point voltage value DY 1 , more accurately evaluates the current efficiency. This method not only introduces the input current DL in and output current DL out The ratio of voltage stability to current efficiency is also considered, thereby improving the accuracy of the evaluation.

[0015] 3. The present invention can obtain a comprehensive index reflecting the overall performance of the power meter by comprehensively evaluating the calculation of the overall performance unit of the power meter. The index comprehensively considers the factors of voltage stability, current efficiency and current fluctuation, provides a clear direction for the performance optimization in the production process of the power meter, and flexibly adjusts the input current DL of the power meter according to the detection needs. in Output current DL out The input current comprehensive performance index ZDX is observed by adjusting the detection conditions in actual applications. in / Output current comprehensive performance index ZDX out changes, thereby continuously optimizing the performance of power meters. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a method flow chart of the power-on detection method for the production of electric power meters; Figure 2 It is a structural schematic diagram of the data processing and analysis module of the present invention; Figure 3 This is a schematic diagram of the overall cycle detection structure of the power-on detection method for power meter production. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present power-on detection method for production of electric power meters is different from the existing power-on detection methods. The existing power-on detection methods often rely on simple voltage and current measurements, lack a comprehensive evaluation of the comprehensive performance of the electric power meter, and flexible adjustment of the detection. The present algorithm unit comprehensively evaluates voltage stability, accurately evaluates current efficiency, and comprehensively evaluates and optimizes performance.

[0019] For example, see Figures 1 to 3 This embodiment provides a power meter production power detection method, the specific implementation steps are as follows: Step 1: Using the voltage measurement module, collect voltage data according to the total amount n of voltage detection points; Step 2: Use the current measurement module to measure the input current DL at the input and output of the power meter. in Output current DL out The current data is collected by detecting the total current detection points m inside the power meter; Step 3: Use the data processing and analysis module, input the voltage data and current data, and calculate the output voltage stability evaluation value DY, the current efficiency evaluation value DL, and the input current comprehensive performance index ZDX in turn. in / Output current comprehensive performance index ZDX out ; Step 4: The current input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Compared with the previous input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Perform comparison, detection and adjustment respectively, and feed back the adjusted parameters to the voltage measurement module and the current measurement module for re-detection and calculation; The data processing and analysis module includes a unit for evaluating the voltage fluctuation of the power meter after it is powered on, a unit for reflecting the efficiency of the power meter when it is converted into electric energy, and a unit for comprehensively evaluating the overall performance of the power meter; The power meter inputs the current DL in Output current DL out The separate detection is reflected in the comprehensive evaluation unit of the overall performance of the power meter; The equipment used in the voltage measurement module includes a voltmeter; The equipment used in the current measurement module includes an ammeter; The equipment used in the data processing and analysis module includes a data acquisition and processing system.

[0020] In this embodiment, the system forms a comprehensive evaluation system for the performance of power meters through the cooperation of three algorithm units, combining DY, DL and ZDX in / ZDX out The three calculation results provide a clear direction and basis for the optimization of power meters. Among them, DY is the voltage stability evaluation value, which introduces the maximum and minimum voltage values, the voltage values ​​at n detection points, and the average voltage value in the calculation. It is of great significance to ensure that the power meter can work stably in a complex and changeable power environment, and also provides a basis for the subsequent current efficiency evaluation value DL and the input current comprehensive performance index ZDX. in / Output current comprehensive performance index ZDX out The calculation of DL is the current efficiency evaluation value, which can intuitively understand the current conversion efficiency of the power meter during the power-on process and provide an important basis for optimizing the design and performance of the power meter. in is the comprehensive performance index of input current, ZDX outThe output current comprehensive performance index is calculated based on this flexibility adjustment. It is of great significance to ensure that the power meter can meet the relevant standards and requirements during production and use. It also provides a clear direction for the optimization of the power meter. in / ZDX out Compared with the previous ZDX in / ZDX out The comparison of calculation results can also affect the feedback to the next DY, DL and ZDX in / ZDX out The calculation establishes a tightly integrated and interrelated circular feedback mechanism among the three algorithms of this system.

[0021] See also Figures 1 to 3 , the calculation formula for the unit to evaluate the voltage fluctuation after the power meter is powered on is as follows: ; in: DY is the voltage stability assessment value; DY max is the maximum voltage value; DY min is the minimum voltage value; DY avg is the average voltage value; DY avg / 10 is used as a reference for the voltage fluctuation range to evaluate the voltage stability and is compared with DY max -DY min The comparison reflects the relative size of voltage fluctuation; Average voltage value DY avg The calculation formula is as follows: DY avg =(DY 1 +DY 2 +DY 3 +......+DY n ) / n; n is the total number of voltage detection points, and n reflects the total number of detection points for voltage detection in the current power-on detection; DY 1 is the voltage value of the first detection point, DY 2 is the voltage value of the second detection point, DY 3 is the voltage value of the third detection point, DY n is the voltage value of the nth detection point; Among them, the maximum voltage value DY max and minimum voltage value DY min For DY 1 , DY 2 , DY3 ,......,DY n The maximum and minimum voltage values ​​collected in.

[0022] In this embodiment: First, in this algorithm unit, "DY avg The calculation part of " / 10" is to scale the voltage average value to facilitate comparison and calculation with other items. In the voltage stability evaluation value DY formula, "DY avg / 10" is used as a reference for the voltage fluctuation range to evaluate the voltage stability. max -DY min " can reflect the relative size of voltage fluctuations. Here, 10 is a scaling factor used to adjust the average voltage value DY avg The value range of DY max -DY min Match in magnitude, thus more accurately reflecting voltage stability; “(DY 1 +DY 2 +DY 3 +......+DY n ) / n” calculation part calculates the average value of the voltage, that is, the average voltage value DY avg , average voltage value DY avg It is one of the important parameters for evaluating voltage stability. In the voltage stability evaluation value DY formula, it is part of the denominator and is related to the voltage fluctuation range "DY max -DY min ” are used together to calculate the voltage stability index; “ The calculation part calculates the relative size of voltage fluctuations. This part is the core of the voltage stability evaluation value DY formula and is used to quantify the voltage stability. By comparing the voltage fluctuation range with the average voltage value DY avg The difference in square roots can yield an indicator of voltage stability; This algorithm unit not only considers the maximum and minimum values ​​of the voltage through the voltage stability evaluation value DY, but also comprehensively considers the voltage values ​​at n detection points, so as to more comprehensively reflect the voltage fluctuation of the power meter during the power-on process. The calculation result of the voltage stability evaluation value DY is the subsequent current efficiency evaluation value DL and the input current comprehensive performance index ZDX. in / Output current comprehensive performance index ZDX out The calculation provides important basic data. Without accurate voltage stability assessment, subsequent assessments will lose accuracy. In addition, when the voltage stability evaluation value DY is high, it indicates that the voltage stability of the power meter is poor and needs to be optimized, which can guide adjustments in the production process to improve voltage stability.

[0023] See also Figures 1 to 3 , the calculation formula reflecting the efficiency unit when the power meter is converted into electrical energy is as follows: DL=[(DL out / DL in )×(100 / (1+DY))]-[(DY 1 -DY avg ) / (DY max -DY min )×10]; in: DL is the current efficiency evaluation value; DL out is the output current; DL in is the input current; DY 1 is the voltage value of the first detection point; In (100 / (1+DY)), 100 means the order of magnitude adjusted to match the current efficiency percentage; [(DY 1 -DY avg ) / (DY max -DY min )×10], where 10 reflects the influence of enhanced voltage fluctuation on current efficiency evaluation.

[0024] In this embodiment, first, "DL out / DL in The calculation part calculates the current efficiency, that is, the output current DL out With input current DL in The current efficiency is one of the important indicators for evaluating the performance of power meters. In the current efficiency evaluation value DL formula, it is the first item and reflects the efficiency of the power meter in converting electrical energy.

[0025] The calculation part of "(100 / (1+DY))" scales the voltage stability evaluation value DY for comparison and calculation with other items. In the formula of the current efficiency evaluation value DL, "(100 / (1+DY))" is used as an adjustment item to consider the impact of voltage stability on current efficiency. By scaling the voltage stability evaluation value DY to the same order of magnitude as the current efficiency, it can be included in the comprehensive evaluation of the current efficiency. Here, 100 is a scaling factor used to adjust the value range of the voltage stability evaluation value DY to an order of magnitude that matches the current efficiency percentage; “(DY 1-DY avg ) / (DY max -DY min )×10” calculation part calculates the voltage fluctuation effect on the voltage value DY of the first detection point 1 and the average voltage value DY avg The amplification effect of the difference between the voltage fluctuations and the current efficiency is one of the adjustment items of the current efficiency evaluation value DL formula. It is used to consider the potential impact of voltage fluctuations on the current efficiency evaluation. By amplifying the proportional relationship between the voltage fluctuations and the voltage difference at a specific detection point, the current efficiency can be evaluated more comprehensively. Here, 10 is an amplification factor, which is used to enhance the impact of voltage fluctuations on the current efficiency evaluation. By amplifying this impact, the current efficiency evaluation value DL formula can be made more sensitive to voltage fluctuations, thereby more accurately reflecting the performance of the power meter. In the efficiency unit reflecting the conversion of the power meter into electric energy, select the voltage value DY at the first detection point 1 The calculation is an exemplary choice. In practical applications, different detection point voltage values ​​can be selected for calculation according to specific detection requirements and the characteristics of the power meter. The first detection point voltage value DY is selected. 1 Because it represents the voltage state at the initial stage of detection. However, this does not mean that the voltage values ​​at other detection points are not important. In practical applications, it is necessary to comprehensively consider the voltage values ​​at multiple detection points to more comprehensively evaluate the current efficiency. This algorithm unit not only considers the output current DL through the current efficiency evaluation value DL out With input current DL in The ratio of the voltage stability evaluation value DY and the voltage value DY at the first detection point is also combined. 1 , so that the current efficiency of the power meter can be evaluated more accurately. The current efficiency evaluation value DL is expressed in percentage form, which can intuitively reflect the current conversion efficiency of the power meter during the power-on process, which helps to understand the actual performance of the power meter and provides an important basis for optimizing design and performance; When the current efficiency evaluation value DL is low, it indicates that the current efficiency of the power meter is poor and measures need to be taken to optimize it, which can guide adjustments in the production process to improve the current efficiency.

[0026] See also Figures 1 to 3 , comprehensively evaluate the overall performance of the power meter. The unit inputs the current DL to the input terminal of the power meter. in The calculation formula for the detection is as follows: ; in: ZDX in is the comprehensive performance index of input current; DL in，rated is the input rated current; DL in，avg is the average value of input current; DL in，max is the maximum input current value; DL in，min is the minimum input current value; 5 in the figure shows the influence of the enhanced current fluctuation on the comprehensive performance evaluation; The comprehensive evaluation unit for the overall performance of the power meter evaluates the output current DL of the output terminal of the power meter. out The calculation formula for the detection is as follows: ; in: ZDX out is the comprehensive performance index of output current; DL out,rated is the output rated current; DL out,avg is the average output current; DL out,max is the maximum output current value; DL out,min is the minimum output current value.

[0027] In this embodiment, the algorithm unit first " The calculation part compares the current efficiency evaluation value DL with the rated current DL rated With input current DL in The ratio of is multiplied to reflect the performance of the power meter under rated conditions. In the comprehensive evaluation of the overall performance of the power meter, this part is used as the first item to evaluate the comprehensive performance of the power meter under rated conditions. By combining the current efficiency and the rated current DL rated With input current DL in The ratio of , to obtain an index reflecting the overall performance of the power meter; The calculation part is to convert the voltage value DY of the first detection point 1 With input current DL in and input rated current DL in，rated The ratio of is added and squared to calculate the voltage value DY at the first detection point. 1 Represents the voltage state at the beginning of the detection, reflecting the initial voltage condition, and is related to the input current DL in and input rated current DL in，rated The ratio of is added, and the influence of voltage and current on the comprehensive performance of the power meter is comprehensively considered. The calculation part is similar, which is to convert the voltage value DY of the first detection point 1 With the output current DLout and output rated current DL out,rated The ratio of is added and squared for calculation, which comprehensively considers the influence of voltage and output current on the comprehensive performance of the power meter, and reflects the relationship between the voltage state and the output current relative to the rated value. Calculate the part and The calculation part is calculated in this way because the stability of voltage and the size of current will affect the performance of the power meter, and combining the voltage and current factors can more comprehensively evaluate the overall performance of the power meter, and the square operation is also to enhance the weight of this part on the comprehensive performance index; “ The calculation part calculates the relative magnitude of the current fluctuations and takes into account the input current and the current average value DL avg The difference in current fluctuations affects the overall performance. This part is used as one of the adjustment items in the calculation formula for the overall performance unit of the comprehensive evaluation of the power meter to consider the potential impact of current fluctuations on the comprehensive performance evaluation. By amplifying the current fluctuation and the input current DL in The average current DL avg The proportional relationship between the differences can more comprehensively evaluate the comprehensive performance. Here, 5 is an amplification factor, which is used to enhance the impact of current fluctuations on the comprehensive performance evaluation. By amplifying this impact, the comprehensive evaluation unit of the overall performance of the power meter is more sensitive to current fluctuations, thereby more accurately reflecting the performance of the power meter. This algorithm unit uses the input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out It provides a comprehensive evaluation method for the overall performance of power meters. It not only takes into account voltage stability and current efficiency, but also current fluctuations, so as to more comprehensively reflect the performance of power meters. The input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out The calculation results provide a clear direction for the optimization of power meters. When the input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out When it is low, it indicates that the overall performance of the power meter is poor and measures need to be taken to optimize it, which can guide adjustments in the production process to improve overall performance; By calculating the input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out And continuously optimizing the performance of power meters can improve product quality and reliability.

[0028] See also Figures 1 to 3 , input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out The detection and evaluation process for two consecutive times, namely the current and previous times, is as follows: If the current input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Compared with the previous input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out If the voltage detection range is set unreasonably, the voltage is unstable, and the number and distribution of the total number of voltage detection points n and the total number of input current detection points m should be increased; If the current input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Compared with the previous input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out If there is an improvement, it means that the current stable performance of the power meter can be reflected, and the number and distribution of the total voltage detection points n and the total current detection points m should be maintained.

[0029] In this embodiment, the algorithm unit forms a closed-loop system for the entire power-on detection process based on the cyclic influence of the unit for comprehensively evaluating the overall performance of the power meter on the unit for evaluating the voltage fluctuation after the power meter is powered on. This system can continuously iterate and optimize the performance of the power meter until the input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Reach the optimal value; Specifically, this implementation adjusts the detection conditions and recalculates the voltage stability evaluation value DY, the current efficiency evaluation value DL and the input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out , we can gradually find the input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out The detection conditions and parameter combinations that achieve the optimal value improve the optimization efficiency and reduce unnecessary trial and error costs. During the optimization process, the optimization of the voltage stability evaluation value DY will directly affect the calculation result of the current efficiency evaluation value DL, and then affect the input current comprehensive performance index ZDX. in / Output current comprehensive performance index ZDX out This mutual influence enhances the stability of the system, making the optimization result more reliable and accurate, and by constantly comparing the current input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDXout The input current comprehensive performance index ZDX corresponding to the previous detection calculation in / Output current comprehensive performance index ZDX out , and adjust the number of detection points and voltage range according to the comparison results, which can form a continuous feedback loop. This loop makes the performance optimization of the power meter a dynamic process rather than a one-time task. As the feedback loop proceeds, the performance of the power meter can gradually stabilize and improve, thereby meeting higher working requirements; In the feedback loop, the number and distribution of the total voltage detection points n and the total current detection points m can more effectively capture and locate the performance problems of the power meter within a specific voltage range, which helps to timely discover and solve potential performance bottlenecks and faults, prevent the problem from further deteriorating and causing greater losses. By optimizing the number and distribution of detection points and fine-tuning the voltage range, detection resources can be used more effectively, which can not only improve detection efficiency, reduce unnecessary detection times and time, but also reduce detection costs. At the same time, the optimized detection strategy can also better adapt to the working conditions and needs of the power meter, thereby improving the overall work efficiency and performance; To sum up, the beneficial effects of the unit for evaluating the voltage fluctuation after the power meter is powered on, the unit reflecting the efficiency when the power meter is converted into electric energy, and the unit for comprehensively evaluating the overall performance of the power meter, as well as the detailed beneficial effects of the unit for comprehensively evaluating the overall performance of the power meter on the cyclic impact of the unit for evaluating the voltage fluctuation after the power meter is powered on are closely centered around the unit for evaluating the voltage fluctuation after the power meter is powered on, the unit reflecting the efficiency when the power meter is converted into electric energy, and the unit for comprehensively evaluating the overall performance of the power meter and the parameters therein. These beneficial effects not only improve the scientificity and rigor of the power meter power-on detection method, but also provide a clear direction and basis for the optimization of the power meter. Moreover, such a feedback loop is manifested in the continuous performance optimization, the timeliness of problem discovery, the optimization of resource utilization, the enhancement of system robustness, and the promotion of technological innovation and upgrading. These effects jointly promote the continuous improvement and stability of the performance of power meters, and provide a strong guarantee for the safe and efficient operation of the power system.

[0030] For example 2, please refer to Figures 1 to 3 , based on the comprehensive evaluation unit of the overall performance of the power meter, calculate the input current DL in The average input current DL in，avg The calculation formula is as follows: DL in，avg =(DL in1 +DL in2 +DL in3 +......+DL inm ) / m; m is the total number of current detection points, which reflects the total number of detection points for detecting the current of each detection point input inside the power meter; DL in1 Enter the current value for the first detection point, DL in2 Enter the current value for the second detection point, DL in3 Enter the current value for the third detection point, DL inm Enter the current value for the mth detection point; Calculate the output current DL out The average output current DL out,avg The calculation formula is as follows: DL out,avg =(DL out1 +DL out2 +DL out3 +......+DL outm ) / m; m is the total number of current detection points, which reflects the total number of detection points for detecting the current outputted at each detection point inside the power meter; DL out1 is the output current value of the first detection point, DL out2 The output current value of the second detection point, DL out3 is the output current value of the third detection point, DL outm Output current value of the mth detection point.

[0031] In this embodiment, the comprehensive evaluation unit for the overall performance of the power meter is based on the input current DL in and output current DL out , corresponding to the current detection of the power-on detection to be flexibly adjusted, so as to meet the power meter production power-on detection input and output current bidirectional detection, so that it is not limited to the input current DL in Or the output current DL out The test items further meet the correspondence and flexibility of the test; Specifically, when the output current DL is of interest out When comprehensively evaluating the overall performance of the power meter, the unit input and output rated current DL out,rated 、Output current average value DL out,avg 、Maximum output current value DL out,max 、Minimum output current value DL out,min Calculation is performed to more directly reflect the overall level and stability of the output current during the detection process. out When the output current DL out The characteristics of ZDX are the focus of evaluation. out The value will be more affected by the average output current DLout,avg If the output current DL out The stability is good, then ZDX out The value will be higher, indicating that the power meter is outputting current DL out On the contrary, if the output current DL out The volatility is large, then ZDX out The value will decrease, indicating that the output current DL of the power meter needs to be adjusted. out Carry out further optimization and adjustment; When the input current DL in When evaluating the stability and efficiency of the power meter, the overall performance of the unit input is evaluated. in，rated 、Input current average value DL in，avg 、Maximum input current value DL in，max 、Minimum input current value DL in，min Calculation is performed to more directly reflect the overall level and stability of the output current during the detection process. in This allows the power meter to evaluate the performance of receiving and processing the input current DL in In terms of performance, if the input current DL in The stability is good, and the input current DL in With the output current DL out The conversion efficiency between them is high, so ZDX in The value will be higher, indicating that the power meter is under input current DL in On the contrary, if the input current fluctuates greatly and the conversion efficiency is low, then ZDX in The value will decrease, suggesting that the input circuit of the power meter and related components need to be further optimized and adjusted.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power-on detection method for electric power meter production, characterized in that: The specific implementation steps are as follows: Step 1: Using the voltage measurement module, collect voltage data according to the total amount n of voltage detection points; Step 2: Use the current measurement module to measure the input current DL at the input and output of the power meter. in Output current DL out The current data is collected by detecting the total current detection points m inside the power meter; Step 3: Use the data processing and analysis module, input the voltage data and current data, and calculate the output voltage stability evaluation value DY, the current efficiency evaluation value DL, and the input current comprehensive performance index ZDX in turn. in / Output current comprehensive performance index ZDX out ; Step 4: The current input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Compared with the previous input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Perform comparison, detection and adjustment respectively, and feed back the adjusted parameters to the voltage measurement module and the current measurement module for re-detection and calculation; The data processing and analysis module includes a unit for evaluating the voltage fluctuation of the power meter after it is powered on, a unit for reflecting the efficiency of the power meter when it is converted into electric energy, and a unit for comprehensively evaluating the overall performance of the power meter; The power meter inputs the current DL in Output current DL out The separate detections are reflected in the comprehensive evaluation unit of the overall performance of the power meter.

2. A method for detecting power supply for electric power meter production according to claim 1, characterized in that: The equipment used by the voltage measurement module includes a voltmeter; The equipment used by the current measurement module includes an ammeter; The equipment used by the data processing and analysis module includes a data acquisition and processing system.

3. A method for detecting power supply for electric power meter production according to claim 2, characterized in that: The calculation formula of the unit for evaluating the voltage fluctuation after the power meter is powered on is as follows: ； in: DY is the voltage stability assessment value; DY max is the maximum voltage value; DY min is the minimum voltage value; DY avg is the average voltage value; DY avg / 10 is used as a reference for the voltage fluctuation range to evaluate the voltage stability and is compared with DY max -DY min The comparison reflects the relative size of voltage fluctuation.

4. A method for detecting power supply for electric power meter production according to claim 3, characterized in that: The calculation formula reflecting the efficiency unit when the power meter is converted into electric energy is as follows: DL = [(DL out / DL in )×(100 / (1+DY))]-[(DY1-DY avg ) / (OF max -OF min )×10]); in: DL is the current efficiency evaluation value; DL out is the output current; DL in is the input current; DY1 is the voltage value of the first detection point; In (100 / (1+DY)), 100 means the order of magnitude adjusted to match the current efficiency percentage; [(DY1-DY avg ) / (DY max -DY min )×10], where 10 reflects the influence of enhanced voltage fluctuation on current efficiency evaluation.

5. A method for detecting power supply for electric power meter production according to claim 4, characterized in that: The comprehensive evaluation unit for evaluating the overall performance of the power meter inputs the current DL at the input end of the power meter. in The calculation formula for the detection is as follows: ； in: ZDX in is the comprehensive performance index of input current; DL in，rated is the input rated current; DL in，avg is the average value of input current; DL in，max is the maximum input current value; DL in，min is the minimum input current value; Figure 5 shows the influence of enhanced current fluctuation on the comprehensive performance evaluation.

6. A method for detecting power supply for electric power meter production according to claim 5, characterized in that: The comprehensive evaluation unit for the overall performance of the power meter evaluates the output current DL of the output terminal of the power meter. out The calculation formula for the detection is as follows: ； in: ZDX out is the comprehensive performance index of output current; DL out,rated is the output rated current; DL out,avg is the average output current; DL out,max is the maximum output current value; DL out,min is the minimum output current value.

7. A method for detecting power supply for electric power meter production according to claim 6, characterized in that: The input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out The detection and evaluation process for two consecutive times, namely the current and previous times, is as follows: If the current input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Compared with the previous input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out If the voltage detection range is set unreasonably, the voltage is unstable, and the number and distribution of the total number of voltage detection points n and the total number of input current detection points m should be increased; If the current input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out Compared with the previous input current comprehensive performance index ZDX in / Output current comprehensive performance index ZDX out If there is an improvement, it means that the current stable performance of the power meter can be reflected, and the number and distribution of the total voltage detection points n and the total current detection points m should be maintained.

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