10kV架空线路防雷方案对比分析

Comparative Analysis of Lightning Protection Schemes for 10kV Overhead Lines

10kV架空线路的防雷工作一直是配电网安全运行的重中之重,防雷保护设计的优劣直接关系到大量用户的供电可靠性。对现有防雷绝缘子的配置方式与雷击跳闸率进行分析,针对架设避雷线防雷、使用复合绝缘横担防雷、过电压保护器防雷、过电压保护器与防雷绝缘子配合防雷4种方案进行对比,发现现有技术的一些防雷保护措施各有优缺点,其中过电压保护器与防雷绝缘子配合防雷方案为最佳方案。

The lightning protection of 10kV overhead lines has always been the top priority in the safe operation of the distribution network. The quality of the lightning protection design is directly related to the reliability of a large number of users. This paper analyzes the configuration of existing lightning-proof insulators and the lightning trip rate. The four schemes of lightning protection are compared, i.e., setting up lightning arrester, using composite insulation cross-arm lightning arrester, over-voltage protector lightning arrester, and combined lightning arrester with over-voltage protector and lightning insulator. It can be seen that some lightning-proof protection measures of existing technologies have their own advantages and disadvantages. It is concluded that the best lightning protection scheme is the combination of overvoltage protector and lightning protection insulator.