单相H桥型MMC直接功率控制策略研究  

Study on direct power control strategy of single-phase H-bridge MMC

作　　者：宋平岗[1] 吴继珍[1] 林家通 罗善江 康水华 

机构地区：[1]华东交通大学电气与电子工程学院,南昌330013

出　　处：《电测与仪表》2016年第5期42-46,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51367008)

摘　　要：针对模块化多电平换流器(Modular Multilevel Converter,MMC)的研究主要集中在三相系统,很少有文献对单相MMC展开分析研究。文章分析了一种单相H桥型MMC的拓扑结构,建立其数学模型;通过构造和实际交流量成正交关系的虚拟交流量,提出一种基于αβ坐标系的直接功率控制(Direct Power Control,DPC)策略;单相MMC桥臂电流中的二次分量将流入直流侧,为此利用准比例谐振控制器设计环流抑制器;最后在PSCAD/EMTDC中搭建仿真模型,结果验证了所提出控制策略的有效性。At present,the research of modular multilevel converter（ MMC） mainly concentrated in the three-phase system,but a little literature on single phase MMC. This paper analyzes the topology structure of a single-phase H bridge MMC（ SPH-MMC）,and establishes its mathematical model. By constructing a virtual component which is orthogonal relation between the actual ac components,a direct power control strategy（ DPC） based on αβ coordinates for SPH-MMC is proposed in this paper. The double frequency component of arm currents would flow into DC side,so a circulating current suppressing controller based on quasi proportional-resonant controller was designed. Finally,a simulation model of SPH-MMC was built in PSCAD / EMTDC to verify the proposed controller. The results show that the proposed control strategy is effective.

关 键 词：模块化多电平换流器 单相H桥型 直接功率控制 准比例谐振控制器 环流抑制 

分 类 号：TM933[电气工程—电力电子与电力传动]