线路避雷器的绝缘配合

Insulation Coordination for Line Surge Arrester

为用线路避雷器降低输电线路的雷击跳闸率,分析计算了110～500 kV有、无间隙线路避雷器的u-t特性曲线,比较了其保护裕度差异,总结出其技术要求,在绝缘配合原则下提出了如何增加线路避雷器保护裕度的建议;同时统计出我国线路避雷器的使用实况,提出了线路避雷器的安装和维护建议.

Lightning strike on power transmission line occurs with certain probabthty. The line trip-out rate can be reduced By using line surge arresters, the difference in protecting margin is compare by analyzing and calculating the u-t characteristic curve of line arresters with and without gaps, and the technical specification of 110～500kV line surge arresteris put forward. Insulation coordination regulations and proposals for enhancing protective margin of line arresters are summarized and recommendation for application, installing and maintenance of such arrester is given in consideration of practice in China.