Suppression of DC-Link Current Ripple for Modular Multilevel Converters Under Phase-Disposition PWM

被引：32
|
作者：
Deng, Fujin [1 ,2 ]
Yu, Qiang [2 ]
Wang, Qingsong [2 ]
Zhu, Rongwu [3 ]
Cai, Xu [4 ]
Chen, Zhe [5 ]
机构：
[1] Southeast Univ, Jiangsu Key Lab Smart Grid Technol & Equipment, Nanjing 210096, Peoples R China
[2] Southeast Univ, Sch Elect Engn, Nanjing 210096, Peoples R China
[3] Christian Albrechts Univ Kiel, Dept Power Elect, 2D-24142, Kiel, Germany
[4] Shanghai Jiao Tong Univ, Wind Power Res Ctr, Shanghai 200240, Peoples R China
[5] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2020年 / 35卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Harmonic analysis; Voltage control; Pulse width modulation; Power quality; Capacitors; Phase modulation; Switches; Control strategy; dc-link current; modular multilevel converters (MMCs); pulsewidth modulation (PWM); HVDC;
D O I：
10.1109/TPEL.2019.2932849
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) is attractive for medium- or high-power applications because of its high modularity, availability, and high power quality. In this article, the dc-link current ripple of the three-phase MMC derived from the phase-disposition pulsewidth modulation and circulating current control is analyzed. A variable carrier phase-shifted angle control strategy under the two-group carriers-based modulation is proposed to suppress the dc-link current ripple of the three-phase MMC. Through the regulation of the carrier phase-shifted angles under the two-group carriers-based modulation in each carrier period, the high-frequency current injected into the dc link from the three phases of the MMC can be counteracted, which suppresses the dc-link current ripple of the MMC with simple algorithm, and therefore improves the dc-link power quality. Simulations and experimental studies of the MMC are conducted, and the results confirm the effectiveness of the proposed control strategy for the MMC.
引用
收藏
页码：3310 / 3324
页数：15
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