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Power grid harmonic voltage measurement error elimination method and device, equipment and storage medium

A harmonic voltage and voltage technology, applied in the field of grid power quality testing, can solve the problems of easy safety accidents and high risk of electromagnetic voltage transformers, and achieve the effect of ensuring safe operation

Pending Publication Date: 2022-05-10
SHENZHEN POWER SUPPLY BUREAU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the way of traditional technology, since no resonance eliminator is installed, the risk of electromagnetic voltage transformer is too high during operation, and safety accidents are prone to occur

Method used

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  • Power grid harmonic voltage measurement error elimination method and device, equipment and storage medium
  • Power grid harmonic voltage measurement error elimination method and device, equipment and storage medium
  • Power grid harmonic voltage measurement error elimination method and device, equipment and storage medium

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Embodiment Construction

[0036] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

[0038] When used herein, the singular forms "a", "an" and "the / the" may also include the plural forms unl...

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Abstract

The invention relates to a power grid harmonic voltage measurement error elimination method and device. The method comprises the following steps: acquiring a fundamental wave positive sequence voltage and a fundamental wave negative sequence voltage corresponding to a three-phase line voltage of a power grid; determining the negative sequence voltage unbalance degree and the positive and negative sequence voltage phase difference of the three-phase line voltage according to the fundamental wave positive sequence voltage and the fundamental wave negative sequence voltage; determining three conversion coefficients respectively corresponding to the three-phase line voltage according to the negative sequence voltage unbalance degree, the positive and negative sequence voltage phase difference and a preset negative sequence voltage unbalance degree threshold value; and obtaining harmonic data corresponding to the three-phase line voltage, and determining harmonic data of the three-phase phase voltage of the power grid according to the harmonic data corresponding to the three-phase line voltage and the three conversion coefficients. According to the method, the accurate harmonic data of the three-phase phase voltage can be obtained, and the electric energy quality of the power grid can be accurately evaluated based on the harmonic data of the three-phase phase voltage, so that a worker can accurately judge the electric energy quality condition of the power grid, and the power grid can be conveniently maintained or optimized.

Description

technical field [0001] The present application relates to the technical field of grid power quality testing, in particular to a method, device, equipment and storage medium for eliminating grid harmonic voltage measurement errors. Background technique [0002] With the development of power system technology, the scale of the power grid is getting larger and larger, and the number of nonlinear loads is growing explosively. Such as large-scale rectification equipment, frequency conversion speed control device, electrified railway locomotive, electric arc furnace, etc., these nonlinear loads will inject harmonic current into the grid, which will cause voltage distortion of the grid, lead to problems in the power quality of the grid, and reduce the reliability of the grid power supply sex. On the other hand, with the rapid development of modern science and technology, more and more users are using high-end, precise and advanced power electronic equipment, and at the same time, ...

Claims

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Application Information

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IPC IPC(8): G01R22/06G01R23/16
CPCG01R22/06G01R23/16
Inventor 张华赢汪清李艳谢宏朱明星焦亚东高敏
Owner SHENZHEN POWER SUPPLY BUREAU
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