Evaluation method for lightning arrester characteristic distortion caused by high and low temperature factors

Abstract

The invention relates to an evaluation method for lightning arrester characteristic distortion caused by high and low temperature factors; the method is characterized in that an evaluation platform for lightning arrester characteristic distortion caused by high and low temperature factors is built, and the evaluation method comprises the steps that a lightning arrester is grounded and placed in a test box, and the temperature in the test box is set by adjusting a temperature adjusting device; currents flowing through the lightning arrester under different temperature conditions are obtained through a current detector, a current decay factor in the current of the lightning arrester and a performance damage factor of the lightning arrester are comprehensively considered, a characteristic distortion factor of the lightning arrester is obtained, and whether the lightning arrester needs to be overhauled or not is evaluated according to the characteristic distortion. The method mainly aims at realizing characteristic distortion evaluation of the lightning arrester, and the main realization method is to comprehensively consider a current decay factor and a performance damage factor of the lightning arrester, so that the method is of great significance to stable operation of a power grid.

Description

technical field [0001] The invention belongs to the technical field of lightning arrester protection, in particular to an evaluation method of the lightning arrester characteristic distortion caused by high and low temperature factors. Background technique [0002] In recent years, my country's increasingly large power system has turned the main development direction of the power sector into the direction of ultra-high voltage, which has also led to a sharp increase in my country's power demand. Among them, the arrester plays a pivotal role in the entire power network. The main function of the arrester is to prevent overvoltage, so as to ensure the long-term stable operation of the power system. Because of the non-linear advantages of the resistor, the zinc oxide arrester can make the energy flow into the ground quickly when the overvoltage occurs, so as to ensure the stable operation of the power system; and it also has significant advantages such as no freewheeling, no gap...

AI Technical Summary

Problems solved by technology

Due to the influence of ambient temperature and the long-term operation of the zinc oxide arrester, the uneven voltage distribution will cause the aging of the zinc oxide arrester, and even serious cases will affect the operation safety of the entire power grid

[0003] At present, there are few studies on the degree of distortion of arrester characteristics under the influence of temperature factors.

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