浅析浙江省多雷区送电线路外绝缘配置的选择

针对多雷区送电线路特点,对玻璃、复合两种绝缘子的特性、参数进行对比,得出,110kV线路玻璃绝缘子的耐雷水平是复合绝缘子的138%,220kV线路为132%;110kV线路玻璃绝缘子的有效泄漏比距是复合绝缘子的116%,220kV线路为117%。并提出了在多雷区送电线路上,应选择玻璃防污绝缘子,既提高了线路的耐雷水平,又兼顾了绝缘子耐污水平,从而降低了送电线路雷击跳闸率和运行维护成本;对粉尘污染严重段,采用了复合绝缘子与玻璃绝缘子组合,排除了高压端芯棒易受损脆断的隐患。

Selection of Insulators for Thunderous Region in Zhejiang Province

Taking aim at features of transmission lines in thunderous regions,a comparison of performance and parameters between glass and composite insulators was made.It was shown that the lightning withstand voltage level is 138% of that of composite insulator for 110 kV and 132% for 220 kV.The effective specific leakage of 110 kV glass insulator is 116% of that of composite insulator,and 117% for 220 kV class.It is pointed out that selection of anti-pollution glass insulators for transmission lines in thunderous regions may enhance the lightning surge withstand level taking proper consideration also for anti-pollution performance which leads to reduction of lightning trip-out rate of line and the maintenance costs.In severe dusty-polluted region,solution of combinative application of composite and glass insulators can eliminate the hidden trouble of brittle failure of FRP core at HV end.