典型地区配网设备雷击故障特征与防雷措施分析

Analysis of Lightning Strike Characteristics and Lightning Protect Measures of Distribution System in Tangshan Area

雷击是造成配网线路故障的重要原因,且由于配网设备绝缘水平较低、分布上点多面广,雷击故障的影响尤为严重;配网设备及线路的防雷涉及本体防雷措施、自动化水平及网架结构等多方面因素。文章重点针对设备本体的雷击故障及防雷措施进行探讨,在对典型地区配网设备雷击故障特征进行统计分析的基础上,对各种防雷措施的有效性、适用原则及参数要求进行了分析,为配网防雷改造提供参考。

Lightning strikes are one of the major causes of short-circuit faults in distribution system. More faults are caused by lightning strikes in distribution system than in EHV system owing to the lower insulation level of distribution equipments. All of the lighting withstanding level of distribution equipments, distribution automation and network structure determine the lightning protection level of the whole distribution system. The lightning withstanding level and lightning faults of distribution equipments in Tangshan area were analyzed selectively in this paper. The characteristics of lightning faults were researched with statistical analysis. The applicability and the parameters of lightning protect measures were also discussed as a recommendation of application of the measures.