Analysis Of Lightning Fault In Distribution Network And Research On Lightning Protection Technology

Chaoan District,Chaozhou City,Guangdong Province is located in the Chaozhou plain of Guangdong Province at the junction of Chaoshan alluvial plain and hills in eastern Guangdong.More than half of the places are in hills and mountains.Generally,the average number of lightning days in a year will exceed 100 days,and the annual lightning activity is very strong.As the main component and key component of 10 k V overhead distribution network in Chao’an area,10 k V overhead line is widely distributed because of its low insulation performance and technical level,it is vulnerable to lightning disasters for a long time,It makes lightning strike the main cause of 10 k V distribution line trip in this area.Compared with the main overhead line,The insulation level of 10 k V distribution overhead lines is relatively low,Susceptible to lightning According to the characteristics of lightning damage,10 KV overhead distribution lines are attacked by lightning,which can be divided into direct lightning and induction lightning.The line fault caused by direct lightning overvoltage strike is called direct lightning strike hazard,The line fault caused by induced lightning overvoltage attacking the line is called induced lightning hazard.This paper makes a systematic and comprehensive discussion and in-depth research on the main causes and key technical problems that may occur frequently in the lightning disaster events of the whole distribution network,and makes a certain theoretical research and Analysis on the potential lightning protection problems commonly existing in power supply lines above10000 volts through a more comprehensive investigation and research according to the actual situation of the site,The relatively mature use of installed lines and lightning protection measures in high-voltage transmission lines is applied to our lightning protection measures in the whole transmission and distribution network,and practical countermeasures and solutions are provided for the lightning protection and maintenance of main facilities in power supply lines above 10000 volts,and the relevant national technical specifications and standards are clearly put forward.For the line fault statistics from 2014 to 2018,Extract part of the data generated by the thunder movie,Comprehensive analysis of fault data is carried out by using big data analysis methods such as visualization method,mining algorithm and data quality management,From the aspects of design,maintenance and transformation,the 10 k V power distribution system of the original Chao’an district is comprehensively studied,Through the analysis and calculation of big data,the activity law of lightning current in the region has always been,Calculate and analyze the past maximum lightning induced over-voltage in the area where the new or reconstructed line is located,Combining the configuration principle,technical parameters and comparative analysis of each equipment element and device,the advantages and disadvantages of each are analyzed,Put forward differentiated and practical guiding strategies for line insulation configuration and lightning protection facilities optimization,Propose solutions.