Metrological calibration compensation method and device, computer equipment and readable storage medium

Abstract

The application discloses a metering calibration compensation method and device, computer equipment and a readable storage medium, relates to the field of smart electric energy meters, and can calibrate and compensate metering chips, and improves the metering accuracy of the metering chips. The method comprises the following steps: determining an electric energy meter to be compensated and a phase difference change curve of the electric energy meter to be compensated, the phase difference change curve being drawn according to a plurality of metering test results corresponding to the electric energy meter to be compensated; acquiring actual current, theoretical active power and theoretical phase difference associated with the electric energy meter to be compensated, determining the actual phase difference corresponding to the actual current according to the phase difference change curve, and determining the metering error associated with the electric energy meter to be compensated according to the theoretical phase difference and the actual phase difference; determining the power offset associated with the electric energy meter to be compensated according to the metering error and the theoretical active power, and adjusting the calibration parameter of the electric energy meter to be compensated by using the power offset, wherein the calibration parameter is the parameter of the power offset calibrator of the metering chip associated with the electric energy meter to be compensated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smart electric energy meter, in particular to a metering calibration compensation method and device, computer equipment and readable storage medium. BACKGROUND

[0002] The metering chip is a core component of the smart electric energy meter, which can provide high-precision electric energy metering. Through accurate electric energy metering, it can ensure that users pay according to the actual use of electric energy, and also help the power company accurately understand the power consumption situation and optimize the power grid management. With the continuous progress of society, various new types of electrical equipment are continuously applied to daily life. These electrical equipment are mostly non-pure resistive loads, which will cause a phase difference between current and voltage. For example, electric motors (inductive loads) will cause the current to lag behind the voltage, while capacitors (capacitive loads) will cause the current to lead the voltage. This phase difference will affect the overall phase relationship of the power grid, causing the phase of the power grid to change, thereby causing the power factor of the power grid to be low. However, in the case of a certain phase difference and low power factor, the resolution of the phase calibration of the metering chip is not enough, resulting in large metering error and inaccurate metering results. Therefore, there is an urgent need for a metering calibration compensation method to calibrate and compensate the metering chip to improve the metering accuracy of the metering chip. SUMMARY

[0003] Therefore, the present application provides a metering calibration compensation method and device, computer equipment and readable storage medium, mainly to solve the problem that the resolution of the phase calibration of the metering chip is not enough, resulting in large metering error and inaccurate metering results.

[0004] According to the first aspect of the present application, a metering calibration compensation method is provided, which comprises:

[0005] determining a to-be-compensated electric energy meter and a phase difference change curve of the to-be-compensated electric energy meter, the phase difference change curve being drawn according to a plurality of metering test results corresponding to the to-be-compensated electric energy meter;

[0006] obtaining an actual current, a theoretical active power and a theoretical phase difference associated with the to-be-compensated electric energy meter, determining an actual phase difference corresponding to the actual current according to the phase difference change curve, and determining a metering error associated with the to-be-compensated electric energy meter according to the theoretical phase difference and the actual phase difference;

[0007] determining a power offset associated with the to-be-compensated electric energy meter according to the metering error and the theoretical active power, and adjusting a calibration parameter of the to-be-compensated electric energy meter using the power offset, the calibration parameter being a parameter of a power offset calibrator of a metering chip associated with the to-be-compensated electric energy meter.

[0008] According to the second aspect of the present application, a metering calibration compensation device is provided, which comprises:

[0009] A determination module is configured to determine a to-be-compensated electric energy meter and a phase difference variation curve of the to-be-compensated electric energy meter, the phase difference variation curve being drawn according to a plurality of metering test results corresponding to the to-be-compensated electric energy meter;

[0010] An acquisition module is configured to acquire an actual current, a theoretical active power and a theoretical phase difference associated with the to-be-compensated electric energy meter, determine an actual phase difference corresponding to the actual current according to the phase difference variation curve, and determine a metering error associated with the to-be-compensated electric energy meter according to the theoretical phase difference and the actual phase difference;

[0011] A calibration module is configured to determine a power offset associated with the to-be-compensated electric energy meter according to the metering error and the theoretical active power, and adjust a calibration parameter of the to-be-compensated electric energy meter by using the power offset, the calibration parameter being a parameter of a power offset calibrator of a metering chip associated with the to-be-compensated electric energy meter.

[0012] According to the third aspect of the present application, a computer device is provided, which comprises a memory and a processor, the memory stores a computer program, and the processor implements the steps of the method according to any one of the first aspect when executing the computer program.

[0013] According to the fourth aspect of the present application, a computer readable storage medium is provided, which stores a computer program, and the computer program implements the steps of the method according to any one of the first aspect when executed by a processor.

[0014] By the technical scheme, the application provides a metering calibration compensation method, device, computer equipment and readable storage medium. The application first determines a to-be-compensated electric energy meter and a phase difference change curve of the to-be-compensated electric energy meter. The phase difference change curve is drawn according to a plurality of metering test results corresponding to the to-be-compensated electric energy meter. Further, actual current, theoretical active power and theoretical phase difference associated with the to-be-compensated electric energy meter are obtained. The actual phase difference corresponding to the actual current is determined according to the phase difference change curve. The metering error associated with the to-be-compensated electric energy meter is determined according to the theoretical phase difference and the actual phase difference. Next, the power offset associated with the to-be-compensated electric energy meter is determined according to the metering error and the theoretical active power. Finally, the calibration parameter of the to-be-compensated electric energy meter is adjusted by using the power offset, wherein the calibration parameter is the parameter of the power offset calibrator of the metering chip associated with the to-be-compensated electric energy meter. The accurate compensation of the electric energy meter can be realized by performing secondary compensation on the calibration register of the metering chip, thereby realizing accurate metering under a low power factor. No additional device needs to be added, and the cost is not affected. The application is suitable for large-scale popularization and use, reduces energy waste and economic loss caused by metering error, and helps to improve the operation efficiency and reliability of the power system.

[0015] The above description is only a summary of the technical scheme of the application. In order to enable the technical means of the application to be more clearly understood, the specific embodiments of the application are described in detail in the light of the contents of the description, and in order to enable the above and other purposes, features and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for purposes of illustration only and are not considered a limitation of the application. Moreover, like reference numerals in the attached figures are intended to represent the same parts throughout the different drawings. In the drawings:

[0017] Figure 1 A flowchart of a metering calibration compensation method provided by an embodiment of the application is shown;

[0018] Figure 2 An angle error diagram between actual measurement and theoretical measurement of a metering calibration compensation method provided by an embodiment of the application is shown;

[0019] Figure 3 An angle error diagram under different phases of a metering calibration compensation method provided by an embodiment of the application is shown;

[0020] Figure 4 A curve diagram of metering error changing with phase difference of a metering calibration compensation method provided by an embodiment of the application is shown;

[0021] Figure 5 This illustration shows a schematic diagram of active power compensation for a metrological calibration compensation method provided in an embodiment of this application;

[0022] Figure 6 This illustration shows a reactive power compensation diagram of a metrological calibration compensation method provided in an embodiment of this application.

[0023] Figure 7 A schematic diagram of the structure of a metrological calibration compensation device provided in an embodiment of this application is shown;

[0024] Figure 8 A schematic diagram of the device structure of a computer device provided in an embodiment of this application is shown. Detailed Implementation

[0025] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0026] Metering chips are a core component of smart meters, providing high-precision energy metering. Accurate metering ensures users pay according to their actual consumption, while also helping power companies accurately understand power consumption and optimize grid management. With continuous societal progress, various new electrical devices are increasingly used in daily life. Most of these devices are not purely resistive loads, which cause phase differences between current and voltage. For example, motors (inductive loads) cause current to lag behind voltage, while capacitors (capacitive loads) cause current to lead voltage. This phase difference affects the overall phase relationship of the power grid, leading to changes in the grid's phase and a lower power factor. However, even with a certain phase difference and a low power factor, insufficient phase calibration resolution of the metering chip results in significant metering errors and inaccurate measurement results. Therefore, a metering calibration compensation method is urgently needed to calibrate and compensate for the metering chip, improving its metering accuracy.

[0027] This application provides a metrological calibration compensation method, such as... Figure 1 As shown, the method includes:

[0028] 101. Determine the energy meter to be compensated and its phase difference change curve. The phase difference change curve is plotted based on multiple metering test results corresponding to the energy meter to be compensated.

[0029] The energy meter to be compensated is a standard single-phase or three-phase smart energy meter. A standard single-phase or three-phase smart energy meter is a device used to measure and record energy consumption, suitable for commercial and industrial environments. Smart energy meters use built-in sensors and microprocessors to measure voltage, current, and power factor to calculate energy consumption. They can monitor energy usage in real time and store data in internal memory. The metering chip is the core component of the smart energy meter, responsible for accurately measuring voltage, current, power, and energy. The metering chip is used to measure line voltage, line current, calculate active power, reactive power, apparent power, power factor, etc. There are various models of metering chips; this application does not specifically limit the model of the metering chip.

[0030] Furthermore, in order to accurately determine the power calibration value of the metering chip under different load conditions, this application first analyzes from a theoretical perspective, obtaining the angle difference between the actual measurement and the theoretical measurement based on the error value of the smart energy meter under low power factor conditions. Specifically, as follows... Figure 2 As shown, θ1 is the actual phase difference sampled by the meter, S1 and P1 are the apparent power and active power sampled by the meter, respectively, θ2 is the theoretical phase difference, S2 and P2 are the theoretical apparent power and active power, respectively, and Δθ is the angular error between the actual phase difference and the theoretical phase difference. Since the angular error is constant, S1 and S2 are equal. Theoretical analysis shows that since the meter has been calibrated, the source of the error is the angular difference. Furthermore, as... Figure 3 As shown, the angle error of a smart energy meter remains constant and equal under different phases. However, under different currents, the inductance characteristics of the current transformer (CT) change due to the temperature variation of the conductor, resulting in a slight shift in the angle difference. Therefore, it is necessary to measure the phase difference under different currents to determine the energy meter to be compensated and its phase difference variation curve.

[0031] In actual operation, multiple current conditions need to be determined first, such as 1A, 5A, 10A, etc. Further, multiple metering tests are performed on the energy meter to be compensated under these current conditions to obtain the number of energy meter pulses corresponding to each current condition. Specifically, for any current condition, the preset current and preset voltage associated with that current condition are determined. The current to be compensated is configured according to the preset current, and the voltage is configured according to the preset voltage. The preset acquisition period and test stand are determined. The preset acquisition period can be 15s, 30s, 60s, etc. Based on the test stand, the number of energy meter pulses within the preset acquisition period is counted. It should be noted that the number of energy meter pulses reflects the energy meter's response under specific current conditions. The test stand is typically an energy meter calibrator or energy meter tester. These devices are specifically used to check and calibrate the accuracy of energy meters, including the accuracy of pulse output. The test stand can measure the number of energy meter pulses and compare it with theoretical values ​​to ensure the metering accuracy. Furthermore, based on the pulse constant K corresponding to the energy meter to be compensated... P Using the pulse count (kWh) and the energy meter pulse count N, determine the actual energy consumption E of the energy meter to be compensated during the data collection period. Specifically, this can be calculated based on the following formula 1:

[0032] Formula 1:

[0033] For example, the pulse constant K P With a pulse count of 1000 (pulse count / kWh) and a pulse count of 500, the actual energy value E is 0.5kWh. Next, the time length T (in seconds) of the preset sampling period is determined, and the actual active power P1 of the energy meter to be compensated is determined based on the time length T and the actual energy value E. Specifically, this can be calculated based on the following formula 2:

[0034] Formula 2:

[0035] Here, 3600 is the conversion factor for converting electrical energy from kWh to kW. Continuing with the pulse constant K mentioned above... PTaking a pulse count of 500 as an example (1000 pulses / kWh), with a statistical acquisition period of 30 seconds, the actual active power can be calculated to be 60W. Then, based on the actual active power P1, the preset current I associated with the current condition, and the preset voltage V associated with the current condition, the actual phase difference θ1 of the energy meter to be compensated is calculated and associated with the current condition. Subsequently, the actual phase difference is used as the metering test result corresponding to the current condition. The metering test result corresponding to each current condition is determined, and a phase difference variation curve is plotted based on the metering test result corresponding to each current condition. Obtaining the phase difference under different currents through actual measurement, determining the energy meter to be compensated, and the phase difference variation curve of the energy meter to be compensated help evaluate the accuracy and stability of the energy meter under different operating conditions.

[0036] 102. Obtain the actual current, theoretical active power, and theoretical phase difference associated with the energy meter to be compensated. Determine the actual phase difference corresponding to the actual current based on the phase difference change curve. Determine the metering error associated with the energy meter to be compensated based on the theoretical phase difference and the actual phase difference.

[0037] In this embodiment, the actual current associated with the energy meter to be compensated can be measured based on the metering chip, and the theoretical active power and theoretical phase difference can be calculated based on the actual current load, actual voltage, and actual power factor.

[0038] Specifically, firstly, the actual current and voltage associated with the energy meter to be compensated are obtained. The current phase angle and voltage phase angle of the actual current and voltage are measured using standard measuring equipment. Based on the difference between the voltage and current phase angles, the theoretical phase difference of the energy meter to be compensated is determined. It should be noted that the standard measuring equipment can be a power analyzer, a high-precision measuring device typically used to measure parameters such as voltage, current, power, power factor, and phase angle. It can simultaneously measure voltage and current in multiple phases and calculate the corresponding power parameters. Alternatively, a multi-function energy meter can be used, which can measure and record multiple parameters such as voltage, current, active power, reactive power, power factor, and energy. It is usually equipped with a digital display and communication interface for easy data acquisition and analysis. Further, the cosine value of the theoretical phase difference θ2 is calculated. Based on the cosine value of the theoretical phase difference θ2, the actual current I, and the actual voltage V, the theoretical active power corresponding to the energy meter to be compensated is determined. Based on the difference between the actual phase difference θ1 and the theoretical phase difference θ2, the phase error Δθ is determined, and the sine, cosine, and tangent values ​​of the theoretical phase difference θ2 are calculated. The product of the tangent of the theoretical phase difference θ2 and the sine of the phase error Δθ is calculated. Based on the difference between the cosine of the phase error θ2 and the product, the metering error Err is determined, and the metering error is associated with the energy meter to be compensated. The relationship between the angle difference and the error is obtained through theoretical calculation. Under low power factor conditions, the trend of the error is inconsistent with the trend of the angle difference. The metering error calculation process is shown in Formula 3 below:

[0039] Formula 3:

[0040] Since the actual apparent power S1 is equal to the theoretical apparent power S2, the conversion formulas for measurement error are shown in Formulas 4 to 7 below:

[0041] Formula 4:

[0042] Formula 5:

[0043] Formula 6:

[0044] Formula 7: Err=cos(Δθ)-tan(θ2)sin(Δθ)-1

[0045] Furthermore, considering that the phase error Δθ is a very small and constant angular difference, for ease of calculation, cos(Δθ)≈1 and sin(Δθ) is a constant C. Therefore, the formula for calculating the measurement error can be simplified to the following formula 8:

[0046] Formula 8: Err = -tan(θ²) * C

[0047] As can be seen from the simplified formula, the measurement error is only related to the theoretical phase difference. The curve of measurement error changing with phase difference is as follows: Figure 4 As shown. In Figure 4 In the graph, the horizontal axis represents the theoretical phase difference, and the vertical axis represents the measurement error. As can be seen from the graph, the measurement error exhibits an exponential trend as the theoretical phase difference increases.

[0048] 103. Determine the power offset associated with the energy meter to be compensated based on the metering error and theoretical active power. Use the power offset to adjust the calibration parameters of the energy meter to be compensated. The calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the energy meter to be compensated.

[0049] In this embodiment, the power offset Poffest associated with the energy meter to be compensated is determined based on the metering error and the theoretical active power. Considering that the power offset to be compensated is different under different currents or power, and the offset value to be compensated is directly proportional to the current or power, it needs to be dynamically adjusted.

[0050] In actual operation, the product of the actual current and the actual voltage is first calculated to obtain the apparent power S1 or S2 of the energy meter to be compensated. Then, the product of the cosine of the theoretical phase difference θ2 and the apparent power S1 or S2 is calculated to obtain the theoretical active power P2 of the energy meter to be compensated. Finally, the product of the theoretical active power P2 and the metering error Err is taken as the power offset Poffest. Specifically, the power offset Poffest can be calculated based on the following formula 9.

[0051] Formula 9: Poffset=P2*Err=S2*cos(θ2)*(-tan(θ2)*C)

[0052] Simplifying Formula 9 above, we can obtain Formula 10, and then use Formula 10 to calculate the power offset Poffest.

[0053] Formula 10: Poffset=-S2*sin(θ2)*C

[0054] S2 changes dynamically depending on the actual voltage and current, while C is a constant. Therefore, under the same voltage and current, the power offset curve is as follows. Figure 5 and Figure 6As shown in the figure below, although the error exhibits an exponential upward trend, the compensation value of the actual power offset shows a converging trend, indicating that compensation can be performed. Ultimately, the calibration parameters of the energy meter to be compensated are adjusted using the power offset. These calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the energy meter. Specifically, specific commands or interfaces (such as I2C or SPI) can be used to write to the power offset calibrator and compensate the metering chip, ultimately achieving accurate metering under low power factor conditions.

[0055] The method provided in this application first determines the energy meter to be compensated and its phase difference change curve, which is plotted based on multiple metering test results corresponding to the energy meter. Further, it obtains the actual current, theoretical active power, and theoretical phase difference associated with the energy meter. Based on the phase difference change curve, it determines the actual phase difference corresponding to the actual current, and then determines the metering error associated with the energy meter based on the theoretical and actual phase differences. Next, it determines the power offset associated with the energy meter based on the metering error and the theoretical active power. Finally, it adjusts the calibration parameters of the energy meter using the power offset, where the calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the energy meter. By performing secondary compensation on the calibration register of the metering chip, accurate compensation of the energy meter can be achieved, thereby enabling accurate metering under low power factor conditions. This requires no additional components, has no impact on cost, and is suitable for large-scale deployment, reducing energy waste and economic losses caused by metering errors, while also contributing to improved power system operating efficiency and reliability.

[0056] Furthermore, as Figure 1 To specifically implement the method, this application provides a metrological calibration compensation device, such as... Figure 7 As shown, the device includes: a determination module 701, an acquisition module 702, and a calibration module 703.

[0057] The determining module 701 is used to determine the energy meter to be compensated and the phase difference change curve of the energy meter to be compensated, wherein the phase difference change curve is drawn based on multiple metering test results corresponding to the energy meter to be compensated.

[0058] The acquisition module 702 is used to acquire the actual current, theoretical active power and theoretical phase difference associated with the energy meter to be compensated, determine the actual phase difference corresponding to the actual current based on the phase difference change curve, and determine the metering error associated with the energy meter to be compensated based on the theoretical phase difference and the actual phase difference.

[0059] The calibration module 703 is used to determine the power offset associated with the energy meter to be compensated based on the metering error and the theoretical active power, and to adjust the calibration parameters of the energy meter to be compensated using the power offset. The calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the energy meter to be compensated.

[0060] In a specific application scenario, the acquisition module 702 is used to determine the phase error based on the difference between the actual phase difference and the theoretical phase difference, and to calculate the sine value of the phase error, the cosine value of the phase error, and the tangent value of the theoretical phase difference; to calculate the product of the tangent value of the theoretical phase difference and the sine value of the phase error; to determine the metering error based on the difference between the cosine value of the phase error and the product, and to associate the metering error with the energy meter to be compensated.

[0061] In a specific application scenario, the acquisition module 702 is used to acquire the actual current and actual voltage associated with the energy meter to be compensated, measure the current phase angle of the actual current and the voltage phase angle of the actual voltage using standard measuring equipment, and determine the theoretical phase difference of the energy meter to be compensated based on the difference between the voltage phase angle and the current phase angle; calculate the cosine value of the theoretical phase difference, and determine the theoretical active power corresponding to the energy meter to be compensated based on the cosine value of the theoretical phase difference, the actual current and the actual voltage.

[0062] In specific application scenarios, the calibration module 703 is used to calculate the product of the actual current and the actual voltage value to obtain the apparent power of the energy meter to be compensated, and to calculate the product of the cosine value of the theoretical phase difference and the apparent power to obtain the theoretical active power of the energy meter to be compensated; the product of the theoretical active power and the metering error is used as the power offset.

[0063] In a specific application scenario, the determining module 701 is used to determine multiple current conditions, perform multiple metering tests on the energy meter to be compensated according to the multiple current conditions, and obtain the number of energy meter pulses corresponding to each current condition; for any current condition, calculate the actual phase difference associated with the energy meter under the current condition based on the number of energy meter pulses associated with the current condition, and use the actual phase difference as the metering test result corresponding to the current condition; determine the metering test result corresponding to each current condition, and plot the phase difference change curve based on the metering test result corresponding to each current condition.

[0064] In a specific application scenario, the determining module 701 is used to determine, for any current condition, a preset current and a preset voltage associated with the current condition; configure a current for the energy meter to be compensated based on the preset current, and configure a voltage for the energy meter to be compensated based on the preset voltage; determine a preset acquisition period and a test platform; based on the test platform, count the number of energy meter pulses of the energy meter to be compensated within the preset acquisition period, and associate the number of energy meter pulses with the current condition.

[0065] In a specific application scenario, the determining module 701 is used to determine the actual energy consumption of the energy meter to be compensated during the collection period based on the pulse constant corresponding to the energy meter to be compensated and the number of pulses of the energy meter; determine the time length of the preset collection period, and determine the actual active power of the energy meter to be compensated based on the time length and the actual energy value; calculate the actual phase difference of the energy meter to be compensated based on the actual active power, the preset current associated with the current condition, and the preset voltage associated with the current condition, and associate the actual phase difference with the current condition.

[0066] The apparatus provided in this application first determines the energy meter to be compensated and its phase difference change curve, which is plotted based on multiple metering test results corresponding to the energy meter. Further, it acquires the actual current, theoretical active power, and theoretical phase difference associated with the energy meter. Based on the phase difference change curve, it determines the actual phase difference corresponding to the actual current, and then determines the metering error associated with the energy meter based on the theoretical and actual phase differences. Next, it determines the power offset associated with the energy meter based on the metering error and the theoretical active power. Finally, it adjusts the calibration parameters of the energy meter using the power offset, where the calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the energy meter. By performing secondary compensation on the calibration register of the metering chip, accurate compensation of the energy meter can be achieved, thereby enabling accurate metering under low power factor conditions. No additional components are required, resulting in no cost impact. This makes it suitable for large-scale deployment, reducing energy waste and economic losses caused by metering errors, and also contributing to improved power system operating efficiency and reliability.

[0067] It should be noted that other corresponding descriptions of the functional units involved in the metrological calibration compensation device provided in this application embodiment can be found by referring to... Figures 1 to 6 The corresponding descriptions in [the document] will not be repeated here.

[0068] In an exemplary embodiment, see Figure 8Furthermore, a device is provided, comprising a communication bus, a processor, a memory, and a communication interface. It may also include input / output interfaces and a display device, wherein the various functional units can communicate with each other via the bus. The memory stores a computer program, and the processor executes the program stored in the memory to perform the metrological calibration compensation method described in the above embodiments.

[0069] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the metrological calibration compensation method.

[0070] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented in hardware or by using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) and includes several instructions to cause a computer device (such as a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0071] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application.

[0072] Those skilled in the art will understand that the modules in the apparatus of the implementation scenario can be distributed within the apparatus of the implementation scenario as described, or they can be located in one or more apparatuses different from this implementation scenario, with corresponding changes. The modules of the above-described implementation scenario can be combined into one module, or they can be further divided into multiple sub-modules.

[0073] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of the implementation scenario.

[0074] The above disclosures are only a few specific implementation scenarios of this application. However, this application is not limited to these. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A metrological calibration compensation method, characterized in that, include: The phase difference change curve of the energy meter to be compensated is determined, and the phase difference change curve is plotted based on multiple metering test results corresponding to the energy meter to be compensated. The actual current, theoretical active power, and theoretical phase difference associated with the energy meter to be compensated are obtained. The actual phase difference corresponding to the actual current is determined based on the phase difference change curve. The metering error associated with the energy meter to be compensated is determined based on the theoretical phase difference and the actual phase difference. The power offset associated with the energy meter to be compensated is determined based on the metering error and the theoretical active power. The calibration parameters of the energy meter to be compensated are adjusted using the power offset. The calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the energy meter to be compensated. The determination of the metering error associated with the energy meter to be compensated based on the theoretical phase difference and the actual phase difference includes: The phase error is determined based on the difference between the actual phase difference and the theoretical phase difference, and the product of the tangent of the theoretical phase difference and the sine of the phase error is calculated. The difference between the cosine value of the phase error and its product is defined as the measurement error.

2. The method according to claim 1, characterized in that, The determination of the metering error associated with the energy meter to be compensated based on the theoretical phase difference and the actual phase difference includes: The phase error is determined based on the difference between the actual phase difference and the theoretical phase difference, and the sine value of the phase error, the cosine value of the phase error, and the tangent value of the theoretical phase difference are calculated. Calculate the product of the tangent of the theoretical phase difference and the sine of the phase error; The measurement error is determined based on the difference between the cosine value of the phase error and the product, and the measurement error is associated with the energy meter to be compensated.

3. The method according to claim 1, characterized in that, The process of obtaining the theoretical active power and theoretical phase difference associated with the energy meter to be compensated includes: The actual current and actual voltage associated with the energy meter to be compensated are obtained. The current phase angle of the actual current and the voltage phase angle of the actual voltage are measured using standard measuring equipment. The theoretical phase difference of the energy meter to be compensated is determined based on the difference between the voltage phase angle and the current phase angle. Calculate the cosine value of the theoretical phase difference, and determine the theoretical active power corresponding to the energy meter to be compensated based on the cosine value of the theoretical phase difference, the actual current, and the actual voltage.

4. The method according to claim 3, characterized in that, The step of determining the power offset associated with the energy meter to be compensated based on the metering error and the theoretical active power includes: The apparent power of the energy meter to be compensated is obtained by calculating the product of the actual current and the actual voltage value, and the theoretical active power of the energy meter to be compensated is obtained by calculating the product of the cosine value of the theoretical phase difference and the apparent power. The product of the theoretical active power and the measurement error is taken as the power offset.

5. The method according to claim 1, characterized in that, Determining the phase difference change curve of the energy meter to be compensated includes: Multiple current conditions are determined, and the energy meter to be compensated is subjected to multiple metering tests according to the multiple current conditions to obtain the number of energy meter pulses corresponding to each current condition. For any current condition, the actual phase difference associated with the energy meter under the current condition is calculated based on the number of energy meter pulses associated with the current condition, and the actual phase difference is used as the metering test result corresponding to the current condition. Determine the measurement and test results corresponding to each current condition, and plot the phase difference change curve based on the measurement and test results corresponding to each current condition.

6. The method according to claim 5, characterized in that, The step of performing multiple metering tests on the energy meter to be compensated according to the multiple current conditions to obtain the number of energy meter pulses corresponding to each current condition includes: For any given current condition, determine the preset current and preset voltage associated with that current condition; Configure the current of the energy meter to be compensated according to the preset current, and configure the voltage of the energy meter to be compensated according to the preset voltage; Determine the preset data acquisition cycle and test platform; Based on the test platform, the number of energy meter pulses of the energy meter to be compensated within the preset acquisition period is counted, and the number of energy meter pulses is correlated with the current condition.

7. The method according to claim 6, characterized in that, The step of calculating the actual phase difference associated with the energy meter under the current condition based on the energy meter pulse count associated with the current condition includes: Based on the pulse constant corresponding to the energy meter to be compensated and the number of pulses of the energy meter, the actual energy consumed by the energy meter to be compensated during the collection period is determined; The time length of the preset collection period is determined, and the actual active power of the energy meter to be compensated is determined based on the time length and the actual energy value. The actual phase difference of the energy meter to be compensated is calculated based on the actual active power, the preset current associated with the current condition, and the preset voltage associated with the current condition, and the actual phase difference is associated with the current condition.

8. A metrological calibration and compensation device, characterized in that, include: The determination module is used to determine the energy meter to be compensated and the phase difference change curve of the energy meter to be compensated. The phase difference change curve is drawn based on multiple metering test results corresponding to the energy meter to be compensated. The acquisition module is used to acquire the actual current, theoretical active power and theoretical phase difference associated with the energy meter to be compensated, determine the actual phase difference corresponding to the actual current based on the phase difference change curve, and determine the metering error associated with the energy meter to be compensated based on the theoretical phase difference and the actual phase difference. The step of determining the metering error associated with the energy meter to be compensated based on the theoretical phase difference and the actual phase difference includes: determining the phase error based on the difference between the actual phase difference and the theoretical phase difference; calculating the product of the tangent of the theoretical phase difference and the sine of the phase error; and determining the difference between the cosine of the phase error and the product as the metering error. The calibration module is used to determine the power offset associated with the energy meter to be compensated based on the metering error and the theoretical active power, and to adjust the calibration parameters of the energy meter to be compensated using the power offset. The calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the energy meter to be compensated.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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