平行交流线路对直流线路的电磁耦合仿真计算

针对交直流并行情况下交流线路对直流线路的电磁耦合问题,采用PSCAD/EMTDC,对平行线路间的电磁耦合计算进行了理论分析,通过理论推导得出影响各感应分量的因素,从交流线路运行情况与交直流线路相对位置两个角度,通过实例仿真探讨了不同因素对各感应分量的影响规律。结果表明,静电感应电压主要取决于运行线路电压及线路间的电容参数;电磁感应电流主要取决于交流线路运行电流及线路间的电感参数;并行长度、并行位置不影响静电感应电压与电磁感应电流;线路换位能有效削弱线路间的电磁耦合影响。

Simulation Calculation of Electromagnetic Induction between Parallel AC and DC Lines

Electromagnetic couple will be generated when DC and AC transmission lines are set along the same right of way. According to the coupling problem that AC and DC line set along the same right of way, the influence of various factors on different inductive component is studied from perspectives of operating state of AC line and relative position between AC and DC lines based on the PSCAD/EMTDC software. The results show that the electrostatic induction voltage is primarily determined by the voltage of AC lines, and the electromagnetic induced current is determined by the current of AC lines; the induced voltage and current does not vary with the parallel length and parallel position markedly; the electromagnetic coupling effect can be effectively reduced by conductor transposition.