大功率电源网侧谐波电流抑制技术研究

Research into Grid Harmonic Current Elimination Technology of High Power Supply

分析了大功率电源工作时谐波电流产生的机理,介绍了常用于网侧谐波电流抑制的2种方法,重点针对三相全桥电压源高频脉宽调制(PWM)整流器的控制策略和电抗器结构进行了研究,试验表明基于LCL结构的三相电压源整流器能够取得比单电感更优的谐波电流抑制效果。

This paper analyzes the mechanism of harmonic current generation in the operating of high power supply, and introduces two methods usually used for grid harmonics current elimina- tion,focuses on the control strategy and LC structure of 3-phase full-bridge voltage-source high- frequency pulse width modulation （PWM） rectifiers. The test shows that the elimination effect on harmonic current based on LCL structure is superior to the single inductor for 3-phase voltage- source PWM rectifiers.