330kV同塔双回线路感应电压和电流的仿真研究

Simulation research of the induced voltage and current in 330 kV same tower double circuit transmission lines

针对同塔双回线路中,一回线运行、另一回线停运检修时,在停运线路上产生的感应电压和电流是否威胁人身安全的问题,结合罗山—灵州330 kV输电线路实际工程,建立了基于电磁暂态分析程序ATP-EMTP的感应电压和电流仿真计算模型,计算分析了静电感应和电磁感应2种类型的电压和电流。仿真结果表明:330 kV同塔双回线路一回线运行、另一回线停运检修时,停运线路上感应产生的电压、电流幅值远远超过人体的安全电压和安全电流,需对线路接地开关进行正确选择。

Aiming at the problem that when double circuit transmission lines on the same tower,one circuit is operating,and the other is stopping to overhaul,the induced voltage and circuit on the shutdown line whether menace personal safety for maintenance personnal,Combining with Luoshan-Lingzhou330kV transmission line project,establishes the induced voltage and circuit simulation calculation model based on electromagnetism transient analysis program(ATP-EMTP),calculates and analyzes the electrostatic induction voltage and current and electromagnetic induction voltage and current.The simulation result shows that when double circuit transmission lines on the same tower,one circuit is operating,and the other is stopping to overhaul,induced voltage and current on the shutdown line far exceed the humans body safe voltage and current,so need to correctly select the ground switch for line.