Differentiation lightning protection method of urban area 10KV distribution line

Abstract

The present invention discloses a differentiation lightning protection method of an urban area 10KV distribution line. The differentiation lightning protection method of urban area 10KV distribution line comprises: selecting a 10KV distributing line to be included in a lightning positioning system, lightning arresters on typical urban area 10KV distribution lines being all provided with discharge counters; obtaining electric parameters of the typical urban area 10KV distribution lines, the lightning parameters of the line areas and building information surrounding the lines; performing a lightning strike risk assessment of the typical urban area 10KV distribution lines; checking the motion conditions of the discharge counters after thunderstorm every time, and obtaining properties of lightning overvoltages to determine a finally adopted differentiation lightning protection measure; and determining a lightning protection measure. According to the invention, the lightning positioning system and the discharge counter are applied to the distribution lines, corresponding precautionary measures are pointedly made out, and accidents of damaging distribution lines and electrical equipment caused by frequent occurrence of overvoltage are avoided. Moreover, the differentiation lightning protection method of an urban area 10KV distribution line may pointedly perform 10KV distribution line differentiation lightning protection according to economical, obstructive and guiding differentiation lightning protection principles.

Description

technical field [0001] The invention relates to a lightning protection method, in particular to a differentiated lightning protection method for 10KV power distribution lines in urban areas. Background technique [0002] With economic development, the number and length of 10KV lines are increasing, and there are more and more types and applications of arresters. However, accidents caused by overvoltage of distribution lines and electrical equipment are more frequent. 10KV distribution lines are the most The effective lightning protection method is to install lightning arresters, but it is obviously not objective and economical to install lightning arresters near the insulators on each pole or electrical equipment. Considering the project cost, construction, maintenance and other factors and the lightning protection effect comprehensively, where and how many lightning arresters should be installed to achieve the most economical lightning protection effect is an urgent problem...

AI Technical Summary

Problems solved by technology

[0003] In recent years, the country has mainly carried out detailed investigation and research on lightning strike accidents, lightning activity distribution characteristics and related topography of typical high-voltage and ultra-high-voltage transmission lines. State Grid Corporation of China has proposed differentiated lightning protection technology and However, in the past, it was a differentiated lightning protection method for transmission lines. It only analyzed the lightning protection effect of a single lightning protection measure on 10KV distribution lines, and there was no differentiated lightning protection method for 10KV distribution lines in urban areas.