Gao X.-Z.,Changsha University of Science and Technology |
Qiu W.,Changsha University of Science and Technology |
Han A.-Z.,Pingdingshan Electricity Power Supply Company |
Li J.-L.,Changsha University of Science and Technology |
Chen G.-S.,Changsha University of Science and Technology
Gaoya Dianqi/High Voltage Apparatus | Year: 2010
Lightning strike is one of the important reasons which cause the 35 kV distribution lines faults. Lightning activity is frequent in hilly areas, and will do great detriment to the safe operation of 35 kV overhead lines. There are two indexes to evaluate the line lightning protection performance: the one is the lightning trip-out rate, the other is the lightning withstand level of the power line. This paper analyzes the present situation of lightning protection of 35 kV line in Henan. It is considered that line has low insulation level, severe insulator aging, incomplete operation and maintenance, inadequate lightning protection measures, which lead the 35 kV distribution line has high lightning trip-out rate. The results show that: roundly detect the insulators, replace the poor-quality insulators, install the line surge arrester with series gap, improve the insulation level of line, meanwhile, use shunt gap as the lightning protection, erect lightning shield conductor, etc measures can significantly reduce lightning accidents.