Research On Lightning Protection Measures Of 10 KV Distribution Lines In Mudanjiang Area

The 10 kV distribution line is very common in the whole country.It has the characteristics of wide coverage area,large length and large scale,and short single line.It is an important part of the distribution network.The 10 kV distribution lines are vulnerable to lightning strikes,because the most of them are overhead lines directly exposed in the natural environment and there are no corresponding lightning protection measures.Generally speaking,if we do not adopt specific lightning protection measures in the operation process,there will be excessive lightning overvoltage which will lead to line damage or tripping,so that electricity can not be supplied normally,and the safety will be greatly reduced,seriously endangering the lives and property of residents.This research collects and collates the relevant literature on the application of lightning protection measures for 10 kV distribution lines at home and abroad,summarizes the development of lightning protection measures for distribution lines and lightning protection devices at present,and studies the formation,characteristics,classification and parameters of lightning;analyses the overvoltage of induction lightning,and the generation mechanism and development process of the overvoltage of induction lightning.The calculation method of induced lightning overvoltage on overhead lines is analyzed,and the mechanism of common lightning protection measures is studied.In addition,the meteorological characteristics,grid structure characteristics and existing lightning protection measures in Mudanjiang area are briefly analyzed,and the causes of failure of lightning protection measures are thoroughly analyzed.Based on the analysis of lightning strike characteristics and current lightning protection measures in 10 kV distribution lines in Mudanjiang area,suggestions for improvement of lightning protection measures in Mudanjiang area are put forward from four different aspects.Through taking 10 kV distribution linessuch as civil aviation lines which have more lightning accidents as the research object,the lightning protection measures improvement projects of the lines are analyzed and studied,and the implementation effects before and after the transformation are compared and analyzed.The results prove that the implementation of the protection measures proposed in this paper can really play a lightning protection role,providing a certain theory and Practice for the future lightning protection work.Guidance.