Control Strategy for Balancing Capacitor Voltage of Modular Multilevel Converter

被引：0
作者：
Ma, Shang [1 ]
Wang, Yi [1 ]
Lv, Jinli [1 ]
Yu, Guolong [1 ]
机构：
[1] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Baoding 071003, Hebei, Peoples R China
来源：
2014 17TH INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) | 2014年
关键词：
MMC; switching frequency; carrier phase-shifting SPWM; voltage balancing of capacitor;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The Modular Multilevel Converter (MMC), based on cascaded multi-module structure, is suitable for high-voltage/power applications. However, among hundreds of modules, their voltage-balancing is a key problem which is attracting scholars' much attention. Therefore, in this paper, a control strategy based on PI controller is proposed for balancing capacitor voltages of Modular Multilevel Converter (MMC). The proposed control strategy includes the voltage-balancing and circulating current-limiting links. The effectiveness of the strategy is conformed using Matlab/Simulink platform. The simulation results show that the fluctuation of capacitor voltages as well as the circulating current can be confined into acceptable range. In addition, the MMC's switching frequency and system loss can be reduced significantly, since the equivalent switching frequency is promoted to a great extent.
引用
收藏
页码：2460 / 2464
页数：5
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