带电拆除500 kV交流输电线路避雷器方法

Study on the live removing method of surge arrester at 500 kV AC transmission lines

立足于实际工程项目,研究带电拆除500 kV交流输电线路避雷器方法。根据现场实际情况和作业相关设备结构参数与电气参数进行数学物理建模。利用基于有限元法的ANSYS软件对检修人员进出电场以及拆除避雷器时的空间电场变化情况进行仿真计算。并设计空白对照模型进行对比分析,验证该文提出的带电拆除工艺的有效性及安全性。同时结合实际应用,提出带电拆除避雷器项目中的几个注意事项。

This paper studies the hot-line dismount method of lightning arrester at a 500 kV AC transmission line. Firstly, a physical and mathematical model is established based on structural and electrical parameters of related equipment in actual situation. Then, the electric field distribution is calculated by utilizing ANSYS which is based on the finite element method by considering the effect of maintenance staff and the lightning arrester. Besides, a blank control model is designed for comparison to verify the effectiveness and safety of the dismount process. At last, several attentions are proposed during the hot-line dismount process of arrester.