500kV输电线路中低零值绝缘子对长串绝缘子电位和电场分布的影响  

The Impact of Zero and Low Resistance Insulator on Potential and Electric Field Distribution of Long Insulator Strings in the 500 kV Transmission Line

作　　者：陈瑶[1] 邹德华 牛捷 罗日成[1] 唐祥盛 

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410004 [2]湖南省带电作业中心,长沙410076

出　　处：《电瓷避雷器》2015年第3期29-34,共6页Insulators and Surge Arresters

基　　金：国家自然科学基金资助课题(编号:50977003)

摘　　要：应用有限元软件Ansys分析了500 kV输电线路中零值和低值绝缘子及其位置、片数不同对整串绝缘子电位和电场分布的影响。结果表明:零值绝缘子比低值绝缘子对绝缘子串的影响要大,离劣化绝缘子越近电压和电场的影响越大;劣化绝缘子位于导线端和横担端对绝缘子串电压和场强的影响,比位于中部的影响大;多片劣化绝缘子连续分布比不连续分布对绝缘子串电压和场强的影响大;按在线测量分布电压法来检测劣化绝缘子,此方法的误判率和漏检率都很高。The impact of different location and pieces of low resistance insulators and zero resistance insulators on potential and electric field distribution of whole string of insulators in the 500 kV transmission line are analyzed by finite element method. The results show that the impact of zero insulators larger than the low ones, the closer from deterioration insulators, the greater the impact is; The deterioration insulator at the wire end and the end of cross arm has a stronger influence than it at the middle; For multi-piece of the deterioration insulator, impact for continuous distribution is greater than discontinuous distribution; The deterioration insulator is tested by online voltage distribution measurement method; The misjudgment rate and the miss rate of this method is very high.

关 键 词：有限元 零值绝缘子 低值绝缘子 电压 场强 

分 类 号：TM216[一般工业技术—材料科学与工程]