说明：  三相电压型PWN整流器的基于模型预测的直接功率控制，稳态时，直流电压纹波小，交流侧电流谐波含量小，功率因素为1
(Three phase voltage source PWN rectifier based on the model predictive direct power control, steady state, the DC voltage ripple is small, the AC side current harmonic content is small, the power factor is 1)