输电线路导线悬垂绝缘子串风偏闪络的验算  

Checking Calculation on Windage Yaw Flashover of Transmission Line Suspension Insulator String

作　　者：赵保成 陈方东 于文博 陈华 侯子龙 

机构地区：[1]国网冀北电力有限公司检修分公司,北京102488

出　　处：《华北电力技术》2015年第5期35-40,共6页North China Electric Power

摘　　要：近年来,在恶劣气象条件的影响下,500 k V输电线路导线悬垂绝缘子串在雷击和风偏作用下的闪络时有发生,严重影响线路安全、稳定运行。对于雷电活动频繁、强风区等特殊区段,提出并实施针对雷击、风偏闪络的防控措施,能够提高输电线路抵御自然灾害的能力和健康水平。对某500 k V输电线路导线悬垂绝缘子串受横向水平风力作用,最终在雷击和风偏共同作用下导致闪络的现象进行了受力验算和探讨。经过现场验证,风偏闪络时的风速与计算结果基本相符,同时在雷击作用下,极易发生放电掉闸。In recent years,flashover on 500 kV transmission line suspension insulator string caused by lightning and windage yaw often occurred under adverse weather conditions, which seriously affected the safe and stable operation of transmission line. Flashover prevention and control measures for frequent lightning or strong wind region could be proposed and implemented to avoid flashover and to improve resistance of transmission line to natural disasters and health level. For a 500 kV transmission line suspension insulator strings subjected to horizontal wind,the force chec- king calculation under flashover caused by the lightning and windage yaw was given. Through on-site verification,the real wind speed under windage yaw flashover and the calculated wind speed were consistent,and discharge or power off was prone to happen under the lightning.

关 键 词：导线 悬垂绝缘子串 雷击闪络 风偏闪络 受力 验算 预控 

分 类 号：TM216[一般工业技术—材料科学与工程]