电工技术学报  2018, Vol. 33 Issue (16): 3772-3781    DOI: 10.19595/j.cnki.1000-6753.tces.180515
模块化多电平换流技术及其应用专题 |
改进型模块化多电平高压变频器及其控制方法
周少泽, 李彬彬, 王景坤, 徐殿国
哈尔滨工业大学电气工程与自动化学院 哈尔滨 150001
A Hybrid Modular Multilevel High-Voltage Converter and Its Control Method
Zhou Shaoze, Li Binbin, Wang Jingkun, Xu Dianguo
School of Electrical Engineering & Automation Harbin Institute of Technology Harbin 150001 China
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摘要 模块化多电平换流器(MMC)由于其模块化、易于拓展的结构以及理想的正弦输出波形,在高压直流输电中得到广泛应用。而对于高压变频领域,MMC面临低速下电容电压波动过大的问题。一种改进型MMC(HMMC)拓扑结构因其良好的波动抑制特性受到关注。详细分析HMMC的电容电压波动特征,推导出其基频及二倍频波动表达式,并在此基础上给出电容的选型方法。此外,从HMMC内部的能量、环流控制到外部的电机驱动方面提出整体的控制方法,高效稳定地实现高压电机的变频调速。通过仿真和实验对所提方法的有效性进行了验证。
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周少泽
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徐殿国
关键词 模块化多电平换流器高压变频器改进型拓扑电容电压波动分析控制技术    
Abstract: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.
Key wordsModular multilevel converter (MMC)    high-voltage drive    hybrid topology    capacitor voltage ripple analysis    control method   
收稿日期: 2018-04-08      出版日期: 2018-09-03
PACS: TM46  
基金资助:国家自然科学基金面上项目(51477034),台达电力电子科教发展计划(DREG2017001)和中国科协青年人才托举工程资助项目
通讯作者: 李彬彬 男,1989年生,博士,副教授,研究方向为柔性直流输电技术、可再生能源发电技术、模块化多电平技术等。   
作者简介: 周少泽 男,1993年生,博士研究生,研究方向为模块化多电平换流器。E-mail: zhoushaozehit@163.com
引用本文:   
周少泽, 李彬彬, 王景坤, 徐殿国. 改进型模块化多电平高压变频器及其控制方法[J]. 电工技术学报, 2018, 33(16): 3772-3781. Zhou Shaoze, Li Binbin, Wang Jingkun, Xu Dianguo. A Hybrid Modular Multilevel High-Voltage Converter and Its Control Method. Transactions of China Electrotechnical Society, 2018, 33(16): 3772-3781.
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