Research And Application Of Comprehensive Measures Of Lightning Protection For High Voltage Transmission Lines

Lightning activity is a complicated natural phenomenon, which need power system in each department and each link of the cooperation, to minimize the occurrence of lightning disturbance, the ray against losses to a minimum. Lightning protection measures should be considered terrain condition, lightning activity, line features, such as using one or several effective comprehensive measures, to achieve the best effect of the lightning protection. To prevent and reduce the fault of on line lightning protection work, after high voltage transmission line areas should be comprehensive considered the strength of the lightning activity degree and landform characteristics and grounding resistance, and so on and so forth, combine existing high-voltage transmission line running experience and system operation mode, etc., through technical and economic comparison to choose reasonable lightning protection measures.According to the characteristics of the zhangjiakou region, this paper carried out the research and application of high voltage transmission line lightning protection measures, first of all, high voltage transmission lines in zhangjiakou region based lightning parameters and terrain characteristics, the tower grounding resistance is analyzed, using ATP and electrical geometric model, obtained the tower grounding resistance, line insulation coordination, the Angle of line protection and ground tilt Angle and so on four big typical factors effect on transmission line lightning protection level and lightning resisting level of through the counter, counter trip rate, detour lightning trip-out rate and the calculation of total lightning trip-out rate, the typical110kV and220kV high-voltage transmission line lightning disturbance risk are analyzed and evaluation, according to the specific characteristics of zhangjiakou region, puts forward the corresponding improvement of lightning protection measures. Results show that the proposed comprehensive high voltage transmission line lightning protection measures, can effectively reduce lightning trip-out rate of transmission line, help scientific and comprehensive guide line lightning protection area, and the implementation of the lightning protection work in the future has a certain reference.