一种电流均衡控制PWM单相5电平电流型变流器  

A PWM Single-phase 5-level Current-source Inverter with Current-balance Control

作　　者：鲍建宇[1] 曾雨竹[1] 张仲超[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电力系统自动化》2006年第7期69-72,共4页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50477033)。

摘　　要：在传统单相5电平电流型变流器拓扑的基础上,提出了一种新型单相5电平电流型变流器拓扑。结合仿真,详细分析了产生1/2电平电流不均衡的机理,并提出了一种通过直流侧电流反馈来实现均流调节的脉宽调制(PWM)控制方法。最后,以感性负载为例,建立试验样机进行了验证。实验结果表明:在该方法控制下,均流电感电流基本接近于1/2电平,输出的PWM电流波形比较对称,滤波后的电流波形接近于正弦波。Based on the traditional single-phase 5-level CSI topology, a new single-phase 5-level current-source inverter （CSI） is proposed. The mechanism of current-unbalance of 1/2-level is analyzed in detail by simulation. By using current-feedback control, a new PWM control method with the capability of current-balance is proposed. Finally, taking the inductive load as an example, an experimental prototype has been built to validate this proposition. Experimental results show that with the current-balance control, the current in balance-inductor is very close to the half of the total DC current, the output PWM current waveform is symmetrical and the filtered current is almost a sine wave.

关 键 词：电流型变流器 5电平 拓扑 电流不均衡 电流反馈 

分 类 号：TM461[电气工程—电器]