电网电动势初始相位角对三相PWM整流器启动电流的影响分析

基金项目:

国家自然科学基金资助项目（50877051）

详细信息

Analysis of influence of initial phase angle of grid electromotive force on startup current of three-phase PWM rectifier

1.
College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.
Dongfang Electric Machinery Co., Ltd., Deyang 618000, China

摘要: 分析了三相PWM整流器启动冲击电流产生的原因，研究了电网电动势的初始相位角和交流侧电压初始相位角对启动电流的影响，提出了采用锁相环的输出来控制电网电动势的初始相位角的方法。该方法避免了启动时某相电流过大的问题，使启动时三相交流电流的大小相差不大。实验结果验证了该理论分析的正确性和方法的有效性。
- 三相PWM整流器 /
- 启动电流 /
- 电网电动势 /
- 初始相位角 /
- 锁相环
Abstract: The paper analyzed causes of startup inrush current of three-phase PWM rectifier, researched influence of initial phase angle of grid electromotive force and initial phase angle of AC side voltage on startup current, and proposed a method to use output of phase-locked loop to control initial phase angle of the grid electromotive force, which can avoid big startup current of a phase when starting, so as to make difference of three-phase AC currents between each other be not vary much. The experimental results verify correctness of the theoretical analysis and validity of the method.
- three-phase PWM rectifier /
- startup current /
- grid electromotive force /
- initial phase angle /
- phase-locked loop