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
CN108414843BActive Publication Date: 2020-02-07ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
Publication Date
2020-02-07

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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.
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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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