采取区间组合法计算输电线路的雷击跳闸率

Calculation of Lightning Outage Rates of Transmission Line with Stochastic Method

本文采用区间组合法计算高压输电线路的雷击跳闸率,并采用电气几何模型计算击杆率和绕击率。对雷电参数的取值进行了分析,提出了如何与实际统计值相吻合的工程计算方法。文中以220kV豆渝线为实例进行了计算,结果表明与运行统计值较吻合,其置信度较规程法好。

In this paper, the lightning outage rates of high voltage transmission lines are calculated with stochastic method, and the fraction of strokes to towers and the rate of shielding failure are also determined by means of electrogeometric model. The lightring parameters are selected in the calculations. A engineering analysis method which fits the actual results is presented. The calculated results of 220kV Dou—yu line show that the credibility of this analysis is better than the rules's.