摘要
针对中国110 kV输电线路遭雷击闪络后工频续流损坏绝缘子及其金具,导致线路事故的实际情况,开展了110 kV架空线路并联间隙防雷保护装置的研究。应用三维有限元法分别对110kV交流单联悬垂串和双联悬垂串复合绝缘子在均压环、均压引弧环和角形电极下的工频电压和电场分布进行了计算。计算结果表明,设计的并联间隙使复合绝缘子串的电压分布有平缓的趋势。线路正常运行时,并联间隙上的最大电场强度在空气平均起晕场强以下,不会产生电晕。
Taking into account the damage of insulator and fittings caused by power frequency follow current and lead to the failure of line after the lightning flashover in the 110 kV transmission line, the research of parallel gap lightning protection device for 110 kV overhead lines is carried out. Three-dimensional finite element method is applied for calculation of power frequency voltage and electric field distribution under grading ring, grading arc ring, angular electrode gap of 110 kV single unit hanging composite insulator strings and double unit hanging composite insulator strings respectively. The results show that the designed parallel gap can smooth voltage distribution of the composite insulator strings. During the normal operation, if the maximum electric field strength on less than the average air corona inception field strength, no corona will occur.
出处
《电瓷避雷器》
CAS
北大核心
2011年第5期26-30,36,共6页
Insulators and Surge Arresters
关键词
有限元法
复合绝缘子
均压环
均压引弧环
角形电极
电场分布
FEM
composite insulator
electric field distribution parallel gap is grading ring
grading arc ring
angular electrode gap
