500kV同塔双回输电线路绕击跳闸率的计算分析  

Calculation Analysis on Shielding Failure Trip-out Rate of 500 kV Double-circuits on Same Tower

作　　者：刘晓冬[1] 苏红梅[1] 徐茂文[2] 郑雄伟[1] 

机构地区：[1]河北省电力研究院,石家庄050021 [2]石家庄供电公司,石家庄050051

出　　处：《河北电力技术》2010年第3期9-11,共3页Hebei Electric Power

摘　　要：采用电气几何模型算法,克服现有规程中计算方法的局限性,对500 kV同塔双回输电线路的绕击跳闸率进行计算。通过改变地面倾角、杆塔保护角和击距系数等参数,得出2种典型塔型在不同条件下的绕击跳闸率,并分析了杆塔高度、地面倾角等参数对绕击跳闸率的影响。This paper introduces electro-geometrical model,to conquer localization of calculation method in existing regulations,calculates shielding failure trip-out rate of 500 kV double-circuits on same tower.Through changing ground elevation,angle of protection and striking distance factor and other parameters,this paper gets shielding failure trip-out rate of two typical tower in different condition,and analyzes influences of height of the tower and ground elevation on failure trip out rate.

关 键 词：500KV同塔双回输电线路 绕击 跳闸率 改进电气几何模型法 

分 类 号：TM863[电气工程—高电压与绝缘技术]