中文摘要：

应用有限元软件Ansys分析了500kV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。

英文摘要：

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.