摘要
针对一起220 kV架空线路雷击三塔三相故障跳闸事故,在考虑现有防雷措施、杆塔形式、绝缘子形式及配置的基础上,通过对地理环境、设备防雷措施、雷电机理过程等方面进行分析,得出事故是由于罕见的具有类似短波头特征的雷电造成雷击杆塔三相跳闸并引起两座相邻杆塔绝缘子雷击闪络破损。提出了进一步明确地区雷电活动的波形特征并开展针对性防范工作,继续开展雷电流波形探测手段的研究及并联间隙等防雷措施,供电力设备运行及科研院所借鉴。
For a rare lightning-stroke which caused 3 towers and 3 phase fault of 220kV overhead wire,considering lightning protection,tower type,insulator type and configuration in existence,the paper concludes that the fault was becaused of a rare lightning which had shortwave character and caused the damage of insulators beside the main flashover tower by analyzing geographical environment and lightning mechanism.The paper presents developing more work on shortwave lightning,exploring of lightning wave and parallel gap lightning protection,and puts forward the precaution measure for the use of reference for electrical equipment running and research institutes.
出处
《电力科学与工程》
2011年第5期56-59,70,共5页
Electric Power Science and Engineering
关键词
架空线路
雷击跳闸
并联间隙
防雷措施
overhead wire
lightning-stroke
parallel gap
lightning protection
