单相三电平整流器控制方法及中点平衡的研究  

Study of Control Strategies and Neutral Point Voltage Balancing of Single Phase Three-level Rectifier

作　　者：章志兵[1] 张志学[1] 

机构地区：[1]株洲南车时代电气股份有限公司技术中心,湖南株洲412001

出　　处：《机车电传动》2008年第4期34-38,共5页Electric Drive for Locomotives

摘　　要：介绍了单相电压型三电平整流器的工作原理,对双闭环控制、固定开关频率的电流控制、预测电流控制和改进的瞬态电流控制等常用控制策略进行了分析,指出了它们的优缺点;针对单相三电平整流器的中点平衡问题,探讨了一种电压前馈的中点电位控制方法。Matlab环境下的仿真结果表明,改进的瞬态电流控制法的动、静态性能良好,电压前馈的中点电位控制方法能简单有效地平衡直流侧电容电压。The operating principle of single phase three-level voltage source rectifier is introduced. And also analyzed are the common control strategies such as the dual closed-loop control, current control with fixed switching frequency, forecast current control and improved transient current control. Advantages and disadvantages are pointed out. For the neutral point balancing problem for single-phase three-level rectifier, a control method of neutral position with voltage pre-feed is discussed. The simulation result under Matlab environment shows that the improved transient current method features good dynamic and static performance. The control method of neutral position with voltage pre-feed could balance easily and efficiently the DC link capacitance and voltage.

关 键 词：PWM整流器 三电平 控制策略 中点电位控制 

分 类 号：TM46[电气工程—电器]