摘要
当电网电压幅值发生较大正向波动时,会影响三相脉宽调制(PWM)整流器的工作状态,使直流输出电压升高甚至失控。在此对输出电压升高的机理进行详细分析,设计了电网电压自适应的整流器控制策略。提出通过观测网侧电压,以有功电流控制是否饱和作为开启条件,通过注入无功电流,稳定直流侧电压的方法,提高了整流器工作的可靠性。最后通过仿真和实验,验证了理论分析的正确性和控制策略的有效性。
The three-phase pulse width modulation（PWM） rectifier is affected by grid voltage,direct current link voltage would increase even out of control as high positive fluctuation occurred.This characteristics is analyzed in de- tail and the control strategy to adapt grid voltage is designed.A method based on reactive current injection is pro- posed to stabilize direct current link voltage by observing grid voltage when active current control is in saturation.Fi- nally, simulation and experimental results verify the accuracy and validity of analysis and control strategy.The reliabil- ity of the rectifier is improved.
作者
杨志伟
李叶松
尹泉
YANG Zhi-wei;LI Ye-song;YIN Quan(Huazhong University of Science and Technology, Wuhan 430074, Chin)
出处
《电力电子技术》
CSCD
北大核心
2018年第2期81-85,共5页
Power Electronics
基金
国家自然科学基金(61374049)
关键词
整流器
电网电压
自适应
无功电流
rectifier
grid voltage
adaptive
reactive current
