Lightning arrester resistive current compensation method

A technology of resistive current and compensation method, which is applied in the direction of measuring current/voltage, instrument, measuring electricity, etc., can solve the problems of inaccurate angle compensation, insufficient consideration, easy to cover up bad working conditions or defects of arresters, etc., and achieve operating conditions Accurate, Highly Accurate Effects

Active Publication Date: 2020-10-09
MAINTENANCE BRANCH OF STATE GRID FUJIAN ELECTRIC POWER +1
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Problems solved by technology

This supplementary method is not considered comprehensive enough, the angle compensation is not accurate enough, and it is easy to cover up the bad working conditions or defects in the operation of some arresters

Method used

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  • Lightning arrester resistive current compensation method
  • Lightning arrester resistive current compensation method
  • Lightning arrester resistive current compensation method

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Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Based on the vector algorithm and the relationship between the three-phase current and voltage in normal operation, the present invention provides a method for compensating the resistive current of the arrester, such as figure 1 shown, including:

[0017] For the case where only the influence of B-phase arrester on the leakage current of A and C-phase arresters is considered, the influence components of the three phases of the arrester on the leakage current are calculated on the vector.

[0018] For this case, neglecting the influence of the surrounding electrified body on the leakage current of the arrester, the influence of the B-phase arrester on the leakage current of the A and C-phase arresters is to superimpose a B-phase arrester on the leakage current vector of the A and C-phase arresters respectively. The influence of...

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Abstract

The invention relates to a lightning arrester resistive current compensation method which comprises the following steps: as for the condition that only the influence of a B-phase lightning arrester onleakage currents of an A-phase lightning arrester and a C-phase lightning arrester is considered, calculating influence components of three phases of the lightning arrester on the leakage currents ona vector; as for the condition that only the influence of the surrounding electrified bodies on the leakage current of the lightning arrester is considered, calculating the influence component of thesurrounding electrified bodies on the leakage current of the lightning arrester on the vector; as for the condition that the influence of surrounding electrified bodies on the leakage current of thelightning arrester and the influence of the leakage current among three phases of the lightning arrester are comprehensively considered, calculating the vector sum of the leakage current of the three-phase lightning arrester, calculating the influence component of surrounding electrified bodies on the leakage current of the lightning arrester and the influence component of three phases of the lightning arrester on the leakage current through vector decomposition, and then carrying out complete compensation on the leakage current of the three-phase lightning arrester. The method is beneficial to improving the effectiveness and accuracy of resistive current compensation of the lightning arrester.

Description

technical field [0001] The invention relates to a compensation method for resistive current of a lightning arrester. Background technique [0002] At present, in the testing of leakage current and resistive current of surge arresters in substations, the resistive current is significantly affected by other phase arresters and surrounding charged objects, which is not conducive to finding bad working conditions of surge arresters in operation. At present, the compensation algorithm for the resistive current of the arrester only considers the influence of the B-phase arrester on the resistive current of the A and C-phase arresters, and simply compensates through the angle. This supplementary method is not comprehensive enough, the angle compensation is not accurate enough, and it is easy to cover up the bad working conditions or defects in the operation of some arresters. Contents of the invention [0003] The object of the present invention is to provide a method for compen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R19/10G01R31/00G01R31/52
CPCG01R19/00G01R19/10G01R31/00G01R31/52
Inventor 宋临春王兆丰王腾滨黄妍妍廖煜王佳烨何建华周国生吴智敏林瀚伟
Owner MAINTENANCE BRANCH OF STATE GRID FUJIAN ELECTRIC POWER
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