A Hybrid Modular Multilevel High-Voltage Converter and Its Control Method

被引：0
|
作者：
Zhou S. [1 ]
Li B. [1 ]
Wang J. [1 ]
Xu D. [1 ]
机构：
[1] School of Electrical Engineering & Automation, Harbin Institute of Technology, Harbin
来源：
Li, Binbin (libinbin@hit.edu.cn) | 2018年 / China Machine Press卷 / 33期
关键词：
Capacitor voltage ripple analysis; Control method; High-voltage drive; Hybrid topology; Modular multilevel converter (MMC);
D O I：
10.19595/j.cnki.1000-6753.tces.180515
中图分类号：
学科分类号：
摘要：
Modular multilevel converter (MMC) has been widely used due to its modularity, easy-to-expand structure and ideal sinusoidal output waveforms for high voltage direct current (HVDC) transmission. However, for high-voltage motor drive applications, MMC faces the problem of large capacitor voltage ripples at low speeds. A hybrid MMC (HMMC) topology has attracted attention because of its good capacitor voltage ripple suppression characteristics. This paper analyzes the characteristics of HMMC capacitor voltage ripple. The expressions of fundamental and second order components of capacitor voltage ripples are derived. Then the capacitor selection method is presented. In addition, from the aspects of the internal energy and circulation control of the HMMC and the external motor drive, this paper proposes an overall control method to efficiently and stably realize the high-voltage motor variable-frequency drives. The effectiveness of the proposed method is further verified by simulations and experiments. © 2018, Electrical Technology Press Co. Ltd. All right reserved.
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页码：3772 / 3781
页数：9
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