三相PWM整流，实现功率双向流动,可保持直流侧电压稳定-three-phase PWM rectifier, power can bidirectional flow ，can maintain the stable DC voltage

不同位置下不同故障类型时（三相短路，单相接地，两相短路，两相接地）的电力系统潮流计算-Different locations under different fault types (three-phase short-circuit, single phase, two-phase short circuit, two-phase) Power Flow