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

Abstract

The invention discloses a metering calibration compensation method and device, computer equipment and a readable storage medium, relates to the field of intelligent electric energy meters, and can perform calibration compensation on a metering chip and improve the metering accuracy of the metering chip. The method comprises the following steps: determining a to-be-compensated electric energy meter and a phase difference change curve of the to-be-compensated electric energy meter, wherein the phase difference change curve is drawn according to a plurality of metering test results corresponding to the to-be-compensated electric energy meter; acquiring an actual current, 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; and 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 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.

Description

Technical Field

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

[0002] The metering chip is the core component of the smart energy meter. It can provide high-precision energy measurement. Through accurate energy measurement, users can be guaranteed to pay according to the actual amount of electricity used. At the same time, it also helps power companies to accurately understand the power consumption and optimize the management of the power grid. With the continuous progress of society, various new electrical equipment are constantly being used in daily life. Most of these electrical equipment are non-pure resistive loads, which will cause a phase difference between current and voltage. For example, the motor (inductive load) will cause the current to lag behind the voltage, while the capacitor (capacitive load) 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, resulting in a low power factor of the power grid. However, when there is a certain phase difference and the power factor is low, the measurement error is large and the measurement result is not accurate enough due to the insufficient resolution of the phase calibration of the metering chip. Therefore, a measurement calibration compensation method is urgently needed to calibrate and compensate the metering chip to improve the measurement accuracy of the metering chip. Summary of the invention

[0003] In view of this, the present application provides a measurement calibration compensation method, device, computer equipment and readable storage medium, the main purpose of which is to solve the problem that the phase calibration resolution of the current measurement chip is insufficient, resulting in large measurement errors and inaccurate measurement results.

[0004] According to a first aspect of the present application, a measurement calibration compensation method is provided, the method comprising:

[0005] Determine an electric energy meter to be compensated and a phase difference variation curve of the electric energy meter to be compensated, wherein the phase difference variation curve is drawn according to a plurality of measurement test results corresponding to the electric energy meter to be compensated;

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

[0007] The power offset associated with the electric energy meter to be compensated is determined according to the metering error and the theoretical active power, and the calibration parameters of the electric energy meter to be compensated are adjusted using the power offset. The calibration parameters are parameters of the power offset calibrator of the metering chip associated with the electric energy meter to be compensated.

[0008] According to a second aspect of the present application, a measurement calibration compensation device is provided, the device comprising:

[0009] A determination module, used to determine an electric energy meter to be compensated and a phase difference variation curve of the electric energy meter to be compensated, wherein the phase difference variation curve is drawn according to a plurality of measurement test results corresponding to the electric energy meter to be compensated;

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

[0011] A calibration module is used to determine the power offset associated with the electric energy meter to be compensated according to the metering error and the theoretical active power, and use the power offset to adjust the calibration parameters of the electric energy meter to be compensated, wherein the calibration parameters are parameters of the power offset calibrator of the metering chip associated with the electric energy meter to be compensated.

[0012] According to a third aspect of the present application, a computer device is provided, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any one of the methods described in the first aspect when executing the computer program.

[0013] According to a fourth aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the methods described in the first aspect are implemented.

[0014] By means of the above technical scheme, the present application provides a measurement calibration compensation method, device, computer equipment and readable storage medium. The present application first determines the electric energy meter to be compensated and the phase difference change curve of the electric energy meter to be compensated. The phase difference change curve is drawn according to multiple measurement test results corresponding to the electric energy meter to be compensated. Furthermore, the actual current, theoretical active power and theoretical phase difference associated with the electric energy meter to be compensated are obtained, and the actual phase difference corresponding to the actual current is determined according to the phase difference change curve, and the measurement error associated with the electric energy meter to be compensated is determined according to the theoretical phase difference and the actual phase difference. Next, the power offset associated with the electric energy meter to be compensated is determined according to the measurement error and the theoretical active power. Finally, the power offset is used to adjust the calibration parameters of the electric energy meter to be compensated, wherein the calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the electric energy meter to be compensated. By performing secondary compensation on the calibration register of the metering chip, accurate compensation for the electric energy meter can be achieved, thereby achieving accurate measurement under low power factor. No additional devices are required and there is no impact on the cost. It is suitable for large-scale promotion and use, reducing energy waste and economic losses caused by metering errors, and also helps to improve the operating efficiency and reliability of the power system.

[0015] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0017] Figure 1 A schematic diagram of a measurement calibration compensation method provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic diagram showing the angle error between actual measurement and theoretical measurement of a metrology calibration compensation method provided in an embodiment of the present application is shown;

[0019] Figure 3 A schematic diagram of angle errors at different phases of a measurement calibration compensation method provided in an embodiment of the present application is shown;

[0020] Figure 4 A schematic diagram of a curve showing a measurement error versus phase difference in a measurement calibration compensation method provided in an embodiment of the present application is shown;

[0021] Figure 5 A schematic diagram of active power compensation of a measurement calibration compensation method provided in an embodiment of the present application is shown;

[0022] Figure 6 A schematic diagram of reactive power compensation of a measurement calibration compensation method provided in an embodiment of the present application is shown;

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

[0024] Figure 8 A schematic diagram of the device structure of a computer device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0025] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0026] The metering chip is the core component of the smart energy meter. It can provide high-precision energy measurement. Through accurate energy measurement, users can be guaranteed to pay according to the actual amount of electricity used. At the same time, it also helps power companies to accurately understand the power consumption and optimize the management of the power grid. With the continuous progress of society, various new electrical equipment are constantly being used in daily life. Most of these electrical equipment are non-pure resistive loads, which will cause a phase difference between current and voltage. For example, the motor (inductive load) will cause the current to lag behind the voltage, while the capacitor (capacitive load) 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, resulting in a low power factor of the power grid. However, when there is a certain phase difference and the power factor is low, the measurement error is large and the measurement result is not accurate enough due to the insufficient resolution of the phase calibration of the metering chip. Therefore, a measurement calibration compensation method is urgently needed to calibrate and compensate the metering chip to improve the measurement accuracy of the metering chip.

[0027] The present application embodiment provides a measurement calibration compensation method, such as Figure 1 As shown, the method includes:

[0028] 101. Determine an electric energy meter to be compensated and a phase difference variation curve of the electric energy meter to be compensated, wherein the phase difference variation curve is drawn according to a plurality of measurement test results corresponding to the electric energy meter to be compensated.

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

[0030] Furthermore, in order to accurately determine the power calibration value corresponding to the metering chip under different load conditions, the present application first analyzes from a theoretical perspective, and obtains the angle difference between the actual measurement and theoretical measurement of the meter based on the error value of the smart energy meter under low power factor. Figure 2 As shown, θ1 is the phase difference of the actual meter sampling, S1 and P1 are the apparent power and active power of the actual meter sampling, θ2 is the theoretical phase difference, S2 and P2 are the theoretical apparent power and active power, and Δθ is the angle error between the actual phase difference and the theoretical phase difference. Since the angle 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 angle difference. Further, as Figure 3 As shown in the figure, the angle error of the smart energy meter is constant and equal when working in different phases. However, under different currents, due to the temperature change of the conductor, the inductance characteristics of the CT change, resulting in a slight offset 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 the phase difference change curve of the energy meter to be compensated.

[0031] In the actual operation process, it is first necessary to determine multiple current conditions, such as 1A, 5A, 10A, etc. Further, the energy meter to be compensated is subjected to multiple metering tests according to multiple current conditions to obtain the number of energy meter pulses corresponding to each current condition of the energy meter to be compensated. Specifically, for any current condition, the preset current and preset voltage associated with the current condition are determined. The current is configured for the energy meter to be compensated according to the preset current, and the voltage is configured for the energy meter to be compensated according to the preset voltage. Determine the preset acquisition cycle and the test table. Among them, the preset acquisition cycle can be 15s, 30s, 60s, etc. Based on the test table, the number of energy meter pulses of the energy meter to be compensated within the preset acquisition cycle is counted. It should be noted that the number of energy meter pulses reflects the response of the energy meter under specific current conditions, and the test table is usually an energy meter calibrator or an energy meter tester. This type of equipment is specifically used to check and calibrate the accuracy of the energy meter, including whether the pulse output is accurate. The test table can measure the number of pulses of the energy meter and compare it with the theoretical value to ensure the measurement accuracy of the energy meter. Furthermore, according to the pulse constant K corresponding to the electric energy meter to be compensated P (pulse number / kWh) and the number of pulses N of the electric energy meter are used to determine the actual electric energy value E consumed by the electric energy meter to be compensated during the collection period. The calculation can be based on the following formula 1:

[0032] Formula 1:

[0033] For example, the pulse constant K P =1000 (pulse number / kWh), the pulse number is 500, and the actual electric energy value E is equal to 0.5kWh. Next, determine the time length T (unit: seconds) of the preset collection period, and determine the actual active power P1 of the electric energy meter to be compensated based on the time length T and the actual electric energy value E. Specifically, it can be calculated based on the following formula 2:

[0034] Formula 2:

[0035] Where 3600 is the conversion factor for converting the energy value from kWh to kW. PThe actual active power is 60W, which is 1000 (pulse number / kWh) and 500 pulses. The statistical collection period is 30 seconds, and the actual active power can be calculated to be 60W. Subsequently, according to 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 electric energy meter to be compensated is calculated, and the actual phase difference θ1 is 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 change curve is drawn according to the metering test result corresponding to each current condition. The phase difference under different currents is obtained by actual measurement, and the determination of the electric energy meter to be compensated and the phase difference change curve of the electric energy meter to be compensated helps to evaluate the accuracy and stability of the electric energy meter under different working conditions.

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

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

[0038] Specifically, first obtain the actual current and actual voltage associated with the electric energy meter to be compensated, use standard measuring equipment to measure the current phase angle of the actual current and the voltage phase angle of the actual voltage, and determine the theoretical phase difference of the electric energy meter to be compensated according to the difference between the voltage phase angle and the current phase angle. It should be noted that the standard measuring equipment can be a power analyzer, which is a high-precision measuring equipment usually used to measure parameters such as voltage, current, power, power factor, phase angle, etc. It can measure the voltage and current of multiple phases at the same time and calculate the corresponding power parameters. It can also be a multi-function electric energy meter, which can measure and record multiple parameters such as voltage, current, active power, reactive power, power factor, electric energy, etc. It is usually equipped with a digital display and communication interface to facilitate data collection and analysis. Further, the cosine value of the theoretical phase difference θ2 is calculated, and the theoretical active power corresponding to the electric energy meter to be compensated is determined according to the cosine value of the theoretical phase difference θ2, the actual current I and the actual voltage V. According to the difference between the actual phase difference θ1 and the theoretical phase difference θ2, the phase error Δθ is determined, and the sine value of the phase error Δθ, the cosine value of the phase error Δθ, and the tangent value of the theoretical phase difference θ2 are calculated. The product of the tangent value of the theoretical phase difference θ2 and the sine value of the phase error Δθ is calculated. According to the difference between the cosine value of the phase error θ2 and the product, the metering error Err is determined, and the metering error is associated with the electric energy meter to be compensated. The relationship between the angle difference and the error is obtained through theoretical calculation. Under low power factor, the trend of the error is inconsistent with the trend of the angle difference. The metering error calculation process is shown in the following formula 3:

[0039] Formula 3:

[0040] Since the actual apparent power S1 is equal to the theoretical apparent power S2, the metering error conversion formula is shown in the following formulas 4 to 7:

[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 angle difference and is constant, for the convenience of calculation, cos(Δθ)≈1 can be used in the calculation, and sin(Δθ) is a constant C, so the measurement error calculation formula can also be simplified to the following formula 8:

[0046] Formula 8: Err = -tan(θ2)*C

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

[0048] 103. Determine a power offset associated with the electric energy meter to be compensated according to the metering error and the theoretical active power, and use the power offset to adjust calibration parameters of the electric energy meter to be compensated, where the calibration parameters are parameters of a power offset calibrator of a metering chip associated with the electric energy meter to be compensated.

[0049] In an embodiment of the present application, the power offset Poffest associated with the electric 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 powers, the compensated offset value is in direct proportion to the current or power and 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 electric energy meter to be compensated, and the cosine value of the theoretical phase difference θ2 and the product of the apparent power S1 or S2 are calculated to obtain the theoretical active power P2 of the electric energy meter to be compensated. Then, the product of the theoretical active power P2 and the metering error Err is used 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] By simplifying the above formula 9, we can get formula 10, and then use the following formula 10 to calculate the power offset Poffest.

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

[0054] S2 will change dynamically according to the actual voltage and current, and C is a constant. Therefore, under the same voltage and current, the power offset value curve is as follows: Figure 5 and Figure 6As shown in the figure below, it can be seen that although the error shows an exponential upward trend, the compensation value of the actual power offset is a convergent trend and can be compensated. Finally, the power offset is used to adjust the calibration parameters of the electric energy meter to be compensated. The calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the electric energy meter to be compensated. Specifically, a specific command or interface (such as I2C, SPI) can be used to write to the power offset calibrator and compensate the metering chip, ultimately achieving the purpose of accurate measurement under low power factor.

[0055] The method provided in the embodiment of the present application can first determine the electric energy meter to be compensated and the phase difference change curve of the electric energy meter to be compensated, and the phase difference change curve is drawn according to multiple measurement test results corresponding to the electric energy meter to be compensated. Further, the actual current, theoretical active power and theoretical phase difference associated with the electric energy meter to be compensated are obtained, the actual phase difference corresponding to the actual current is determined according to the phase difference change curve, and the measurement error associated with the electric energy meter to be compensated is determined according to the theoretical phase difference and the actual phase difference. Next, the power offset associated with the electric energy meter to be compensated is determined according to the measurement error and the theoretical active power. Finally, the calibration parameters of the electric energy meter to be compensated are adjusted by the power offset, wherein the calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the electric energy meter to be compensated. By performing secondary compensation on the calibration register of the metering chip, accurate compensation of the electric energy meter can be achieved, thereby achieving accurate measurement under low power factor, without the need for additional devices, and having no effect on cost. It is suitable for large-scale promotion and use, reducing energy waste and economic losses caused by measurement errors, and also helps to improve the operating efficiency and reliability of the power system.

[0056] Further, as Figure 1 In a specific implementation of the method, the present application provides a measurement 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 determination module 701 is used to determine the electric energy meter to be compensated and a phase difference variation curve of the electric energy meter to be compensated, wherein the phase difference variation curve is drawn according to a plurality of measurement test results corresponding to the electric 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 electric energy meter to be compensated, determine the actual phase difference corresponding to the actual current according to the phase difference change curve, and determine the metering error associated with the electric energy meter to be compensated according to the theoretical phase difference and the actual phase difference;

[0059] The calibration module 703 is used to determine the power offset associated with the electric energy meter to be compensated according to the metering error and the theoretical active power, and use the power offset to adjust the calibration parameters of the electric energy meter to be compensated, wherein the calibration parameters are parameters of the power offset calibrator of the metering chip associated with the electric 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 calculate the sine value of the phase error, the cosine value of the phase error and the tangent value of the theoretical phase difference; calculate the product of the tangent value of the theoretical phase difference and the sine value of the phase error; determine the metering error based on the difference between the cosine value of the phase error and the product, and associate the metering error with the electric energy meter to be compensated.

[0061] In a specific application scenario, the acquisition module 702 is used to obtain the actual current and actual voltage associated with the electric energy meter to be compensated, use standard measuring equipment to measure the current phase angle of the actual current and the voltage phase angle of the actual voltage, and determine the theoretical phase difference of the electric 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 electric energy meter to be compensated based on the cosine value of the theoretical phase difference, the actual current and the actual voltage.

[0062] In a specific application scenario, 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 electric 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 electric energy meter to be compensated; and the product of the theoretical active power and the metering error is used as the power offset.

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

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

[0065] In a specific application scenario, the determination module 701 is used to determine the actual electric energy value consumed by the electric energy meter to be compensated during the collection time period based on the pulse constant corresponding to the electric energy meter to be compensated and the number of pulses of the electric energy meter; determine the time length of the preset collection cycle, and determine the actual active power of the electric energy meter to be compensated based on the time length and the actual electric energy value; calculate the actual phase difference of the electric 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 device provided in the embodiment of the present application can first determine the electric energy meter to be compensated and the phase difference change curve of the electric energy meter to be compensated, and the phase difference change curve is drawn according to multiple measurement test results corresponding to the electric energy meter to be compensated. Further, the actual current, theoretical active power and theoretical phase difference associated with the electric energy meter to be compensated are obtained, the actual phase difference corresponding to the actual current is determined according to the phase difference change curve, and the measurement error associated with the electric energy meter to be compensated is determined according to the theoretical phase difference and the actual phase difference. Next, the power offset associated with the electric energy meter to be compensated is determined according to the measurement error and the theoretical active power. Finally, the calibration parameters of the electric energy meter to be compensated are adjusted by the power offset, wherein the calibration parameters are the parameters of the power offset calibrator of the metering chip associated with the electric energy meter to be compensated. By performing secondary compensation on the calibration register of the metering chip, accurate compensation of the electric energy meter can be achieved, thereby achieving accurate measurement under low power factor, without the need for additional devices, and having no impact on cost. It is suitable for large-scale promotion and use, reducing energy waste and economic losses caused by measurement errors, and also helps to improve the operating efficiency and reliability of the power system.

[0067] It should be noted that for other corresponding descriptions of the functional units involved in the measurement calibration compensation device provided in the embodiment of the present application, reference can be made to Figures 1 to 6 The corresponding description in will not be repeated here.

[0068] In an exemplary embodiment, see Figure 8, and also provides a device, which includes a communication bus, a processor, a memory and a communication interface, and may also include an input and output interface and a display device, wherein each functional unit can communicate with each other through the bus. The memory stores a computer program, and the processor is used to execute the program stored in the memory and execute the measurement calibration compensation method in the above embodiment.

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

[0070] Through the description of the above implementation methods, those skilled in the art can clearly understand that the present application can be implemented by hardware, or by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each implementation scenario of the present application.

[0071] Those skilled in the art will appreciate that the accompanying drawings are merely schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily required for implementing the present application.

[0072] Those skilled in the art will appreciate that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the implementation scenario description, or can be changed accordingly and located in one or more devices different from the implementation scenario. The modules in the above implementation scenario can be combined into one module, or can be further split into multiple sub-modules.

[0073] The above application serial numbers are for description only and do not represent the advantages or disadvantages of the implementation scenarios.

[0074] The above disclosure only discloses several specific implementation scenarios of the present application. However, the present application is not limited thereto, and any changes that can be conceived by technicians in this field should fall within the scope of protection of the present application.

Claims

1. A measurement calibration compensation method, characterized in that: include: Determine an electric energy meter to be compensated and a phase difference variation curve of the electric energy meter to be compensated, wherein the phase difference variation curve is drawn according to a plurality of measurement test results corresponding to the electric energy meter to be compensated; Acquire the actual current, theoretical active power and theoretical phase difference associated with the electric energy meter to be compensated, determine the actual phase difference corresponding to the actual current according to the phase difference change curve, and determine the metering error associated with the electric energy meter to be compensated according to the theoretical phase difference and the actual phase difference; The power offset associated with the electric energy meter to be compensated is determined according to the metering error and the theoretical active power, and the calibration parameters of the electric energy meter to be compensated are adjusted using the power offset. The calibration parameters are parameters of the power offset calibrator of the metering chip associated with the electric energy meter to be compensated.

2. The method according to claim 1, characterized in that The determining the metering error associated with the electric energy meter to be compensated according to the theoretical phase difference and the actual phase difference comprises: Determine a phase error according to a difference between the actual phase difference and the theoretical phase difference, and calculate a sine value of the phase error, a cosine value of the phase error, and a tangent value of the theoretical phase difference; Calculating the product of the tangent value of the theoretical phase difference and the sine value of the phase error; The metering error is determined according to the difference between the cosine value of the phase error and the product, and the metering error is associated with the electric energy meter to be compensated.

3. The method according to claim 1, characterized in that The obtaining of the theoretical active power and the theoretical phase difference associated with the electric energy meter to be compensated includes: Acquire the actual current and actual voltage associated with the electric 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 electric energy meter to be compensated according to the difference between the voltage phase angle and the current phase angle; The cosine value of the theoretical phase difference is calculated, and the theoretical active power corresponding to the electric energy meter to be compensated is determined according to 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 determining the power offset associated with the electric energy meter to be compensated according to the metering error and the theoretical active power includes: Calculating the product of the actual current and the actual voltage value to obtain the apparent power of the electric energy meter to be compensated, and calculating the product of the cosine value of the theoretical phase difference and the apparent power to obtain the theoretical active power of the electric energy meter to be compensated; The product of the theoretical active power and the measurement error is used as the power offset.

5. The method according to claim 1, characterized in that The determining of the phase difference variation curve of the electric energy meter to be compensated comprises: Determine multiple current conditions, perform multiple metering tests on the electric energy meter to be compensated according to the multiple current conditions, and obtain the number of electric energy meter pulses corresponding to each current condition of the electric energy meter to be compensated; For any current condition, according to the number of electric energy meter pulses associated with the current condition, calculate the actual phase difference of the electric energy meter to be compensated associated with the current condition, and use the actual phase difference as the measurement test result corresponding to the current condition; Determine the measurement test result corresponding to each of the current conditions, and draw the phase difference change curve according to the measurement test result corresponding to each of the current conditions.

6. The method according to claim 5, characterized in that The method of performing multiple metering tests on the electric energy meter to be compensated according to the multiple current conditions to obtain the number of electric energy meter pulses corresponding to each current condition of the electric energy meter to be compensated includes: For any current condition, determining a preset current and a preset voltage associated with the current condition; configuring a current for the electric energy meter to be compensated according to the preset current, and configuring a voltage for the electric energy meter to be compensated according to the preset voltage; Determine the preset collection cycle and test table; Based on the test meter, the number of pulses of the electric energy meter to be compensated within the preset acquisition period is counted, and the number of pulses of the electric energy meter is associated with the current condition.

7. The method according to claim 6, characterized in that The step of calculating the actual phase difference of the electric energy meter to be compensated associated with the current condition according to the number of electric energy meter pulses associated with the current condition comprises: Determine the actual electric energy value consumed by the electric energy meter to be compensated during the acquisition time period according to the pulse constant corresponding to the electric energy meter to be compensated and the number of pulses of the electric energy meter; Determine the time length of the preset acquisition cycle, and determine the actual active power of the electric energy meter to be compensated according to the time length and the actual electric energy value; According to the actual active power, the preset current associated with the current condition and the preset voltage associated with the current condition, the actual phase difference of the electric energy meter to be compensated is calculated, and the actual phase difference is associated with the current condition.

8. A measurement calibration compensation device, characterized in that: include: A determination module, used to determine an electric energy meter to be compensated and a phase difference variation curve of the electric energy meter to be compensated, wherein the phase difference variation curve is drawn according to a plurality of measurement test results corresponding to the electric energy meter to be compensated; An acquisition module, used to acquire the actual current, theoretical active power and theoretical phase difference associated with the electric energy meter to be compensated, determine the actual phase difference corresponding to the actual current according to the phase difference change curve, and determine the metering error associated with the electric energy meter to be compensated according to the theoretical phase difference and the actual phase difference; A calibration module is used to determine the power offset associated with the electric energy meter to be compensated according to the metering error and the theoretical active power, and use the power offset to adjust the calibration parameters of the electric energy meter to be compensated, wherein the calibration parameters are parameters of the power offset calibrator of the metering chip associated with the electric energy meter to be compensated.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

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

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