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Discrimination method of direct lightning strike and induction lightning based on optical integrated electric field sensor

A technology integrating electric field and sensors, applied in the field of fault identification, can solve the problems of electrical equipment damage, power system collapse, affecting power system stability, reliability, safety and economy, etc., to achieve the effect of convenient installation and easy measurement

Active Publication Date: 2020-02-07
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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AI Technical Summary

Problems solved by technology

Lightning strikes may cause line switches to trip, cause power outages, damage electrical equipment, and even lead to vicious accidents such as the collapse of the power system, resulting in major economic losses and seriously affecting the stability, reliability, safety and economy of power system operation.

Method used

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  • Discrimination method of direct lightning strike and induction lightning based on optical integrated electric field sensor
  • Discrimination method of direct lightning strike and induction lightning based on optical integrated electric field sensor
  • Discrimination method of direct lightning strike and induction lightning based on optical integrated electric field sensor

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Embodiment Construction

[0017] The method for discriminating direct lightning and induced lightning based on optical integrated electric field sensor proposed by the present invention comprises the following steps:

[0018] (1) Three optical integrated electric field sensors (in an embodiment of the present invention, the three-phase optical integrated electric field sensor used is produced by Tsinghua University, can refer to the Chinese patent application that publication number is CN102854403B) is installed in substation respectively to be measured Directly below the line, make the three optical integrated electric field sensors have the same height from the ground, and make the polarity orientation of the three optical integrated electric field sensors consistent, respectively pass light to the three optical integrated electric field sensors to monitor the line to be measured online Waveform of lightning overvoltage;

[0019] (2) When there is a direct lightning strike or an induced lightning str...

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Abstract

The invention relates to a direct thunder and inductive thunder discrimination method based on an optical integrated electric field sensor, and belongs to the technical field of fault recognition. According to the method, the three-phase independent lightning overvoltage of the two ends of the insulator is separated from the original waveform through the method of filtering, overvoltage extractionand decoupling based on the measurement data of the optical integrated electric field sensor, and the direct thunder and the inductive thunder are discriminated according to the polarity of the three-phase lightning overvoltage. The method is verified by practice and has the advantages of being convenient to install and test and high in fault recognition rate.

Description

technical field [0001] The invention relates to a method for distinguishing direct lightning strikes and inductive lightning strikes based on an optical integrated electric field sensor, and belongs to the technical field of fault identification. Background technique [0002] High-voltage overhead transmission lines are an important part of the power system. They are widely distributed, crisscross, and stretch for hundreds of miles or even thousands of kilometers, so they are extremely vulnerable to lightning strikes. Lightning overvoltage is divided into direct lightning overvoltage and induced lightning overvoltage. Direct lightning strike refers to lightning directly hitting electrical equipment, lines or buildings, causing strong lightning current to flow through these objects and causing overvoltage in the entire system; induced lightning refers to the electromagnetic field in the space around the discharge channel during the discharge process of thunderclouds to the gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/08
CPCG01R29/0885G01R29/0892
Inventor 曾嵘刘刚蔡汉生庄池杰王涉施健刘磊
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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