同塔架设的220kV／500kV输电线路感应电流与感应电压仿真分析

Simulative Analysis of Induced Voltages and Currents Among Multi Circuit 220kV and 500kV Transmission Lines on Same Tower

以河南电网500kV郑州—郑州东/220kV中牟—郑州东同塔多回输电线路为实例,建立了同塔多回输电线路模型,研究同塔多回输电线路之间的感应电压和感应电流。在上述条件下进行了电力系统数字仿真,通过计算分析,得出了不同电压等级输电线路同塔架设时各回路间感应电压和感应电流的一般规律,并对500kV郑州—郑州东、220kV中牟—郑州东同塔多回输电线路接地刀闸参数的选择提出了要求。

Taking multi circuit 220kV/500kV transmission lines on same tower in Henan power system for example in which two 500 kV transmission lines are from Zhengzhou to East Zhengzhou and two 220 kV transmission lines are from Zhongmu to East Zhengzhou, a model of multi circuit transmission lines on same tower is built, and by which the induced currents and voltages among multi circuit transmission lines on same tower are researched and simulated. Through calculation and simulation, the general rule of induced currents and voltages among transmission lines that belong to different voltage classes and are arranged on same tower is obtained, and the requirements to parameters of grounding switches for 500 kV transmission lines from Zhengzhou to East Zhengzhou and that for 220 kV transmission lines from Zhongmu to East Zhengzhou to East Zhengzhou configured on the same tower are put forward.