Lightning waveform parameter time domain statistical method based on optical integrated electric field sensor

Abstract

The invention relates to a lightning waveform parameter time domain statistical method based on an optical integrated electric field sensor, and belongs to the technical field of waveform analysis. According to the method, the three-phase independent lightning overvoltage waveform is separated from the original waveform through the method of filtering, overvoltage extraction and decoupling based on the measurement data of the optical integrated electric field sensor, and statistical analysis of the measured waveform parameters is performed in the time domain according to the definition of thewavefront time, the half peak time and the overvoltage multiple of the lightning impulse voltage standard waveform in the IEC. The method is based on the optical integrated electric field sensor and has the characteristics of being convenient to install and convenient to measure.

Description

technical field [0001] The invention relates to a time-domain statistical method of lightning waveform parameters based on an optical integrated electric field sensor, and belongs to the technical field of waveform analysis. 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. Statistics show that the number of trips caused by lightning strikes on high-voltage overhead transmission lines in my country accounts for 40%-70% of the total number of trips in operation. In 2012, there were 1,894 lightning strike trips on 110kV and above transmission lines of China Southern Power Grid, accounting for 65.4% of the total number of trips. In areas with thunderstorms, mountainous areas, and areas with high soil resistivity, the accident rate of power transmission c...

AI Technical Summary

Problems solved by technology

When lightning strikes the overhead transmission line, it may cause the line switch to trip and cause a power outage, and it will also cause damage to electrical equipment, and even lead to vicious accidents such as the collapse of the power system, causing major economic losses and seriously affecting the stability, reliability and safety of the power system operation. sex and economy

[0003] In recent years, the lightning flashover of my country's power grid has been on the rise. The reasons are: 1. Lightning activities have intensified; Understand the law, lightning protection measures will get twice the result with half the effort

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