具有共模电压减小和电容电压平衡的五电平有源中点钳位型变换器SVPWM算法  

A Space Vector Pulse Width Modulation with Common-Mode Voltage Reduction and Capacitor Voltage Balance Control for Five-Level Active Neutral-Point-Clamped Converter

作　　者：李俊杰[1] 姜建国[1] 刘云龙 周中正 Li Junjie;Jiang Jianguo;Liu Yunlong;Zhou Zhongzheng(Key Laboratory of Control of Power Transmission and Conversion Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China;School of Mechanical Electronic&Information Engineering,China University of Mining and Technology(Beijing)Beijing,100083,China)

机构地区：[1]电力传输与功率变换控制教育部重点实验室(上海交通大学),上海200240 [2]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《电工技术学报》2018年第13期3109-3118,共10页Transactions of China Electrotechnical Society

基　　金：国家重点基础研究发展计划(973计划)(2014CB046306);国家高技术研究发展计划(863计划)(2014AA052602)资助项目

摘　　要：针对五电平有源中点钳位型(ANPC)变换器共模电压和电容电压平衡问题,提出一种基于gh坐标系的改进空间电压矢量调制(SVPWM)算法。所提SVPWM算法能够减小共模电压,同时实现悬浮电容电压和直流侧电容电压的平衡控制。首先,通过选取合适的冗余开关状态减小共模电压。其次,根据各相悬浮电容电压偏差和输出电流方向,选取合适的冗余开关组合,实现悬浮电容电压平衡。同时,提出一种中点电压模型预测控制(MPC)策略,根据目标函数对所有五段式开关序列进行滚动寻优,选取最优开关序列。最后,实验验证了所提SVPWM算法的有效性。In order to solve the problems of common-mode voltage and capacitor voltage balance for five-level active neutral-point-clamped(ANPC)converter,a novel space vector pulse width modulation(SVPWM)algorithm based on gh coordinate is presented.The proposed SVPWM algorithm not only reduces the common-mode voltage,but also balances the capacitor voltages.First,the commonmode voltage is reduced by choosing the appropriate redundant switching states.After that,according to the floating-capacitor voltage deviations and output current directions for each phase,floating-capacitor voltages are balanced by selecting the appropriate switch combinations.Moreover,model predictive control(MPC)of neutral-point voltage is proposed.The optimal switching sequence is selected by using the receding optimization based on the cost function for all the five-segment switching sequences.Finally,the experimental results verify the validity of the proposed SVPWM algorithm.

关 键 词：五电平 有源中点钳位型 悬浮电容电压平衡 中点电压平衡 共模电压 空间电压矢量调制 

分 类 号：TM464[电气工程—电器]