不平衡供电下PWM整流器输出电压稳定控制  

A Stability Control Scheme for Output Voltage of Three-Phase PWM Rectifier Under Unbalanced Power Supply

作　　者：王萌[1] 施艳艳[1] 王海明[2] 沈明辉[2] 

机构地区：[1]河南师范大学物理与电子工程学院,河南新乡453007 [2]国网河南省电力公司新乡供电公司,河南新乡453000

出　　处：《测控技术》2014年第8期68-71,共4页Measurement & Control Technology

基　　金：河南省教育厅科学技术研究重点项目(13B470083);河南师范大学博士科研启动基金(01026500122);河南师范大学青年科学基金(2013QK04)

摘　　要：针对电网供电电压不平衡造成PWM整流器输出功率波动的问题,分析了三相电压型PWM整流器在不平衡供电电压下的瞬时输出功率模型,设计了输出有功、无功功率的二次谐波补偿环节,提出一种三相PWM整流器输出电压稳定控制策略。控制系统运行时不包含正、负序分解过程,能够有效抑制整流器输出有功、无功功率二次谐波,实现直流母线电压的稳定输出。仿真和实验结果证明了控制策略的有效性。In order to suppress the output power fluctuations, instantaneous output power model of three-phase voltage source PWM rectifier is analyzed under unbalanced power supply. The second harmonic compensation part is designed for active/reactive power. Also, a stability control scheme for output voltage of three-phase PWM rectifier is proposed. The operation of the control system requires no positive and negative decomposition. Besides, the second harmonic of the active/reactive power for the rectifier can be effectively suppressed and stable output of the DC bus voltage is realized. The simulation and experimental result demonstrate the validity of the proposed control scheme.

关 键 词：PWM整流器 二次谐波 电压不平衡 输出功率控制 直流母线电压 

分 类 号：TM461[电气工程—电器]