[Poster Presentation]Arm Capacitor Voltage Divergence Suppressing and Stability Improving for an MMC - 2nd China International Youth Conference on Electrical Engineering (CIYCEE 2021)

Arm Capacitor Voltage Divergence Suppressing and Stability Improving for an MMC

ID：81 Submission ID：213 View Protection：ATTENDEE Updated Time：2021-12-05 15:35:10 Hits：556 Poster Presentation

Start Time：2021-12-17 15:20 （Asia/Shanghai）

Duration：5min

Session：[Z] Poster Session » [Z2] Poster Session 2: Power electronic technology and application

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Abstract

Natural arm capacitor voltage balancing of the direct modulated modular multilevel converter (MMC) has been presented in some publications. However, the effect of submodule (SM) voltage control is not considered. This paper reveals that capacitor voltage balancing control may lead to SM voltage divergence between the upper and lower arms. A model of the direct modulated MMC is established, and subsystem of circulating current and arm capacitor voltage is linearized and analyzed. Based on the analysis, a control parameter design principle to effectively suppress arm capacitor voltage diverging and improve the system stability is proposed. The effectiveness of the theoretical analysis and proposed control parameter design principle is verified by simulation results.

Keywords

MMC;direct modulation;capacitor voltage balancing control

Speaker

Xiangyu Jiang

Huazhong University of Science and Technology；China；Wuhan 430074

Xiangyu Jiang received the B.S. degree in electrical engineering from Southwest Jiaotong University, Chengdu, China, in 2021. He is currently working toward the M.S. degree in electrical engineering at Huazhong University of Science and Technology, Wuhan, China. His research interests include modular multilevel converter and motor drive.

Submission Author

Xiangyu Jiang Huazhong University of Science and Technology；China；Wuhan 430074

Yongfei Xing Huazhong University of Science and Technology；China；Wuhan 430074

Xiongfeng Fang Huazhong University of Science and Technology；China；Wuhan 430074

Zeyu Hu Huazhong University of Science and Technology；China； Wuhan 430074

Jian Xiong Huazhong University of Science and Technology； China； Wuhan 430074

Kai Zhang Huazhong University of Science and Technology； China； Wuhan 430074

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