模块化多电平变换器的OMPC策略研究  

Research on the Optimal Model Predictive Control Strategy for Modular Multilevel Converter

作　　者：朱经纬[1] 付文轩[1] ZHU Jing-wei FU Wen-xuan(China University of Mining and Technology, Xuzhou 221008, China)

机构地区：[1]中国矿业大学,信息与电气工程学院,江苏徐州221008

出　　处：《电力电子技术》2017年第1期15-17,32,共4页Power Electronics

摘　　要：模块化多电平变换器(MMC)因其具有公共直流母线的模块化拓扑结构的特点而被广泛应用于高压直流输电、电能质量治理及电气传动等领域。分析MMC拓扑结构,建立MMC数学模型,研究MMC运行控制规律;对MMC内部环流产生机理进行分析,推导了桥臂电流与内部环流的关系;分析了MMC优化模型预测控制(OMPC)策略,最后通过实验验证了OMPC策略能更有效地控制子模块电容电压平衡、减小环流幅值。Modular multilevel converter（MMC） has been widely applied into high voltage direct current transmission, power quality control, electric drive and other fields due to its characteristic of modular topology of common direct current bus.Topological structures of MMC are introduced, and then mathematical models of MMC are established as well as its regulation of operation control.The mechanism, quality and functions of circulation formation are analyzed. The factors influencing the magnitude of the doubling-frequency circulation are analyzed from the power fluctuation of bridge arm,the optimal model predictive control （OMPC） is analyzed.The experimental results show that sub-module capacitor voltage is balanced and the circulating current amplitude is decreased effectively under the OMPC strategy.

关 键 词：模块化多电平变换器 子模块电容电压 模型预测控制 

分 类 号：TM46[电气工程—电器]