十堰220kV输电线路雷击跳闸与地形相关性分析

Correlation Analysis of Lightning Tripping-out and Terrain on 220 kV Transmission Line in Shiyan

十堰地区气候、地理环境复杂,雷电活动频发,线路抵御雷击能力薄弱,雷击跳闸事故频繁发生.本文收集了十堰地区220 kV十悬线雷电参数、雷击事故和地理环境数据,利用规程法和电气几何模型计算线路反击跳闸率和绕击跳闸率.结合十悬线2011 ～2013年线路实际雷害情况,与计算结果进行对比,分析十悬线雷害与线路走廊雷电参数、线路特征和地理环境的相关性.结果表明十悬线雷害主要发生在山顶和大跨距杆塔上.

The climate and geographical environment of Shiyan area is complex and the lightning activities present very frequently. However, the transmission lines in this area have little lightning protection capacity and lightning strike tripping accidents present frequently. This paper had collected lightning parameters and the data of lightning accidents and geographical environment for 220kV Shixuan transmission line in Shiyan area. The regulation method and electric geometry method （EGM） were used to calculate the back flashover trip-out rate and lightning shielding failure trip-out rate of 220kV Shixuan transmission line, This paper compared the actual lightning accidents data （from 2011 to 2013 ） with the calculation results, and analyzed the dependency between lightning accidents and the data. which include the characteristic of transmission line, the data of thunder and the geographical environment.