模块化多电平变换器拓扑的通用控制方法  

Generalized Control Method of Modular Multilevel Converter Topology

作　　者：熊盛涛 刘振兴[1] 廖雪超[1] 李群桥 XIONG Sheng-tao;LIU Zhen-xing;LIAO Xue-chao;LI Qun-qiao(Wuhan University of Science and Technology,Wuhan 430081,China;不详)

机构地区：[1]武汉科技大学,湖北武汉430081 [2]武汉城市学院,湖北武汉430083 [3]武钢有限条材厂,湖北武汉430083

出　　处：《电力电子技术》2022年第1期115-120,共6页Power Electronics

基　　金：国家自然科学基金(51377044)。

摘　　要：针对现有模块化多电平变换器(MMC)拓扑结构繁多、控制策略通用性差的问题,此处提出了一种MMC拓扑的通用控制方法。首先针对MMC的典型拓扑结构进行了拓扑分析并分类,典型拓扑包括MMC、模块化多电平矩阵变换器(MMMC)和六角形模块化多电平AC/AC换流器(Hexverter)。然后通过基于状态空间表示的电流控制和支路能量平衡控制两部分阐述该控制方法的基本原理。针对支路能量平衡问题,此处提出了一种使附加电流应力最小化的优化方法。最后以MMMC为例,通过仿真分析和所搭建的低压实验平台验证了所提通,用控制策略的有效性。结果表明所提通用控制策略的不同解决方案均能有效平衡支路功率,实现控制需求。Aiming at the problem that the existing modular multilevel converter(MMC)has many topologies and poor generality of control strategies,a generalized control method for MMC topology is presented.Fristly,the typical topology of MMC is analyzed and classified.Typical topology includes MMC,modular multilevel matrix converter(MMMC)and.hexagonal modular multilevel AC/AC converter(Hexverter).Then the control method consists of current control based on state space representation and branch energy balance control.To solve the problem of branch energy balance,an optimization method is proposed to minimize the additional current stress.Finally,MMMC is taken as an example to verify the effectiveness of the proposed general control strategy through simulation analysis and set up by low-voltage experimental platform.The results show that the different solutions of the proposed general control strategy can effec-tively balance the branch power and realize the control requirements.

关 键 词：模块化多电平变换器 矩阵变换器 状态空间 支路能量平衡 

分 类 号：TM46[电气工程—电器]