中文摘要：

三相电压型脉宽调制（PWM）整流器主要采用双闭环的前馈解耦控制，包括电压外环和电流内环。电压外环稳定直流母线电压，电流内环控制整流器的输入功率因数。采用该控制策略的PWM整流器在启动时会产生冲击电流。分析了冲击电流的产生原因，提出了PWM整流器的分段启动控制方法。仿真和实验结果均表明该控制策略能很好地抑制PWM整流器启动阶段的冲击电流。

英文摘要：

The feedforward decoupling control method based on dual closed loop is introduced to control the three- phase voltage-source pulse width modulation（PWM） rectifier.The dual closed loop includes the current inner loop and voltage outer loop.The voltage outer loop is used to stabilize the DC bus voltage and the current inner loop keeps the rectifier working with unity power factor.It is easy for PWM rectifier with this control method to generate inrush cur- rent during startup period.After the cause of startup inrush current is analyzed, the grading startup control is proposed to inhibit the startup inrush current.It is proved from simulation and experiments that the PWM rectifier,using grad- ing startup control way, effectively inhibits the startup inrush current.