Circulating Current Suppressing Controller in Modular Multilevel Converter

被引：0
|
作者：
Tu, Qingrui [1 ]
Xu, Zheng [1 ]
Zhang, Jing [2 ]
机构：
[1] Zhejiang Univ, Dept Elect Engn, Hangzhou 310003, Zhejiang, Peoples R China
[2] Zhejiang Elect Power Dispatch & Commun Ctr, Hangzhou, Peoples R China
来源：
IECON 2010 - 36TH ANNUAL CONFERENCE ON IEEE INDUSTRIAL ELECTRONICS SOCIETY | 2010年
关键词：
modular multilevel converter; circulating current; suppressing; doubly fundamental frequency; negative sequence;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A circulating current suppressing controller (CCSC) is presented to eliminate the inner balancing currents in modular multilevel converter (MMC). Based on the double-fundamental-frequency, negative-sequence rotational frame, the three phase alternative circulating currents are decomposed to two DC components, and are limited to a low level by a pair of proportional integral controllers. This control strategy does not affect the MMC outer dynamics in the ac side. Simulation results based on PSCAD/EMTDC demonstrated the circulating current suppressing effect of the proposed CCSC and proved that the distortion of the arm current is mitigated significantly.
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页数：5
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