PWM整流器并联系统零序电流研究

详细信息

Research of Zero Sequence Current of Parallel System of PWM Rectifier

1.
School of Information and Electrical Engineering of CUMT., Xuzhou 221008, China. 2.Huanghua Wuyi Mechanical Corporation, Huanghua 061100, China

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。
- PWM整流器 /
- 并联整流器 /
- 零序电流 /
- 环流 /
- k控制
Abstract: Taking two-level parallel system of PWM rectifier as example, the paper analyzed cause of zero sequence circulation in parallel module: the circulation 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 current of parallel system of PWM rectifier but has no perfect inhabiting effect.
- PWM rectifier, parallel rectifier, zero sequence current, circulation, k control