Phase-separated Calculation Method of Faulty Error Electricity of Electric Energy Metering Device

An electric energy metering device and electric energy technology, which are applied in the direction of measuring device, measuring electric variables, and electric power measurement by applying digital technology, etc. problem, to achieve the effect of eliminating trigonometric function transformation, simplifying the calculation process and reducing workload

Active Publication Date: 2020-11-10
MIANYANG POWER SUPPLY COMPANY STATE GRID SICHUANELECTRIC POWER
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the traditional error power calculation method is greatly affected by the load imbalance and the calculation process is cumbersome and complicated. It is necessary to take the correction coefficient. The calculation of the actual power factor and the trigonometric function conversion in the correction coefficient algorithm are cumbersome. The workload is large and the error rate is high. The present invention provides a phase-separated calculation method for the fault error power of the electric energy metering device that solves the above problems.

Method used

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  • Phase-separated Calculation Method of Faulty Error Electricity of Electric Energy Metering Device
  • Phase-separated Calculation Method of Faulty Error Electricity of Electric Energy Metering Device
  • Phase-separated Calculation Method of Faulty Error Electricity of Electric Energy Metering Device

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Embodiment 1

[0083] Such as figure 1 , image 3 As shown, the phase-separated calculation method of the fault error power of the electric energy metering device includes:

[0084] When a fault occurs in the three-phase three-wire electric energy meter metering device, the voltage and current values ​​of the first element and the second element in the case of wrong measurement during the fault period are obtained;

[0085] According to the voltage and current values ​​of the first element and the second element under the wrong metering situation and the voltage and current values ​​of the first element and the second element under the correct metering situation of the three-phase three-wire electric energy meter metering device, the first element and the second element under the correct metering situation are carried out. Ratio analysis of the voltage and current value of the component and the voltage and current value of the first component and the second component under the condition of ...

Embodiment 2

[0110] Such as figure 2 , Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that it also includes:

[0111] When a fault occurs in the metering device of the three-phase four-wire electric energy meter, obtain the voltage and current values ​​of the first element, the second element, and the third element during the error measurement during the fault period;

[0112] According to the voltage and current values ​​of the first element, the second element and the third element in the case of wrong measurement and the voltage and current values ​​of the first element, the second element and the third element in the correct measurement of the three-phase three-wire electric energy meter metering device, the correct measurement situation is carried out Ratio analysis of the voltage and current values ​​of the first element, the second element, and the third element and the voltage and current values ​​of the first element, the second element, and the t...

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Abstract

The invention discloses a phase-separated calculation method for the error power of a faulty electric energy metering device, which solves the problem that the traditional error power calculation method is greatly affected by load imbalance and the calculation process is cumbersome and complicated. Calculation and trigonometric function conversion are cumbersome, the workload of the metering personnel is heavy, and the error rate is high. The invention relates to a phase-separated calculation method for the fault error quantity of an electric energy metering device, which uses the characteristics of the intelligent electric energy meter to measure data by components and event memory records, etc. Compared with the traditional method, there is no need to consider the influence of three-phase load imbalance and no need to calculate the correction coefficient, which greatly reduces the amount of calculation and improves the error power. Calculated accuracy for all metering device failure types where voltage and current are present.

Description

technical field [0001] The invention relates to the technical field of power metering, in particular to a phase-separated calculation method for faulty and error power of a power metering device. Background technique [0002] Electric energy measurement is an important link in the modern electric power marketing management system, and it is the basis for electric commodity transactions. The accuracy of electric energy measurement is directly related to the economic benefits of both power suppliers and consumers and the timely recovery of electricity charges by electric power companies, and the wiring errors of electric energy meters, etc. Faults will lead to inaccurate measurement or even burning of the metering device, causing many unnecessary losses to the power supply company. For this, it is very necessary to correctly judge the wrong wiring and take effective preventive measures. [0003] The fault types of electric energy metering devices vary widely depending on the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/04G01R21/133
CPCG01R21/1331G01R35/04
Inventor 李东方权锐万婉史向刚黄娅刘卫华
Owner MIANYANG POWER SUPPLY COMPANY STATE GRID SICHUANELECTRIC POWER
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