低压大功率异步电动机对三相短路电流的影响

The Impact of Low-voltage High-power Asynchronous Electromotors on Three-phase Short-circuit Current

使用Matlab软件从短路时刻、短路点、电动机容量三个方面对三相短路时低压大功率异步电动机向短路点反馈电流的影响进行仿真分析,并与计算值进行比较,论证了对称短路时,电动机向短路点反馈短路电流的大小及变化规律。

Using Matlab software, simulation analyses of the impact of low-voltage high-power asynehronous electromotor on the feedback eurrent at short-circuit point are performed from three aspects： shortcircuit time, short-circuit point and the electromotor eapacity when faced with three-phase short-eircuit, and eompared with the ealeulated values. The magnitude and variation rules of the feedback short-circuit current at short-circuit points from the electromotor are demonstrated at the time of symmetrical short-circuit.