摘要
以两电平PWM整流器并联系统为例,分析了并联模块间零序环流产生的原因:并联模块间零序环流是由2个模块的零序电流占空比差异产生的;并联模块间零序环流的产生与后续的负载大小及类型无关。介绍了基于k控制的PWM整流器并联系统零序电流控制策略的实现,并对该控制策略进行了仿真验证。仿真结果表明,k控制可抑制PWM整流器并联系统零序电流,但尚未达到完美的抑制效果。
Taking two-level parallel system of PWM rectifier as example, the paper analyzed cause of zero sequence circulation in parallel module： the circulatiori is generated by difference of duty cycle of zero sequence current of two modules; generation of the circulation has no correlation with size and type of load. It introduced implementation of control strategy of zero sequence current of parallel system of PWM rectifier based on k control and made simulation verification for the control strategy. The simulation result showed that k control can inhabit zero sequence currenf of parallel system of PWM rectifier but has no perfect inhabiting effect.
出处
《工矿自动化》
北大核心
2012年第6期67-71,共5页
Journal Of Mine Automation
关键词
PWM整流器
并联整流器
零序电流
环流
k控制
PWM rectifier, parallel rectifier, zero sequence current, circulation, k control
