输电线路防雷性能评价和综合优化的研究

Study on Anti-lightning Performance Evaluation and Integrated Optimization of Transmission Line

近年来雷击引起输电线路跳闸事故增多,严重危及输电线路安全,是电网安全运行的重大威胁。通过对华北电网公司直属单位近年来的雷击故障统计分析,掌握了防雷重点线路和线路的重点防雷区段。通过应用输电线路雷击跳闸仿真系统对华北电网500 kV昌顺线和220 kV兴榆线进行雷击故障机理的深入研究,建立输电线路综合模型,对全线路进行雷击跳闸率的计算、分析线路防雷性能,进行防雷多参数综合优化分析,为输电线路防雷设计和运行提供科学的理论依据。

Recently more lightning failures happened on the transmission lines, which endangered the security of the transmission lines. Through analysis of lightning failures of North China Power Grid, we have known the important anti-lightning transmission lines and the important anti-lightning field of the transmission lines. By the transmission line lightning failures simulation system, we studied the lightning failure mechanism about the Changping-Shunyi line and Xingyu line, and established the integrated transmission line model, calculating the lightning performance to help engineers select cost-effective lightning protection improvements. We can get the improvement about the lightning performance of the existing transmission line, and identify changes to the line to improve performance.