摘要
根据220 kV同塔双回输电线路线路实际结构,考虑铁塔、分裂导线、均压环、Zn O电阻片的介电性和导电性等因素的影响,采用时谐电场三维有限元计算方法,以对比的方式研究了220 kV架空输电线路雷击闪络限制器对复合绝缘子串、均压环电位及电场强度分布的影响;研究结果表明,闪络限制器提高了电位及电场强度沿复合绝缘子分布的均匀性,降低了复合绝缘子电场强度最大值;限制器使上均压环表面场强略有增加,使下均压环表面电场强度略有减小,但电场强度最大值远低于限制值。
According to the actual structure of 220 kV double-circuit transmission line,consider the influence of the factors such as the tower,the bundle conductor,the grading ring,the dielectric and the conductivity of the Zn O resistor,using the three-dimensional finite element method of time harmonic electric field,the influence of the lightning flash limiter on the distribution of the insulator string,the grading ring and the electric field intensity of the 220 kV overhead transmission line is studied in a comparative way;Research indicates,the flashover limiter improves the uniformity of the potential and the electric field intensity along the distribution of the composite insulator,and reduces the maximum electric field strength of the composite insulator;the field strength of the upper grading ring is slightly increased,but the maximum electric field strength is much lower than the limit value.
作者
许衡
文武
瞿杨全
万帅
巢亚锋
张瑞
曹伟
杜雪松
XU Hen;WEN Wu;QU Yangquan;WAN Shuai;CHAO Yafen;ZHANG Rui;CAO Wei;DU Xuesong(Wuhan NARI Limited Liability Company of State Grid Electric Power Research Institute,Wuhan 430074,China;School of electrical engineering,Wuhan University,Wuhan 430072,China;Xiangyang Guowang Composite Insulator Co.,Ltd.,Xiangyang 441002,China;State Grid Hunan Electric Power Corporation Research Institute,Changsha 410007,China)
出处
《电瓷避雷器》
CAS
北大核心
2019年第1期233-238,共6页
Insulators and Surge Arresters
基金
国家电网公司科技项目(编号:SGZJ0000KXJS1700294)
关键词
输电线路
避雷器
闪络限制器
线路防雷
transmission lines
surge arrester
flashover limiter
lightning protection
