基于子模块电容电压允许值的MMC均压控制策略

doi:10.11930/j.issn.1004-9649.202107126

中国电力 ›› 2023, Vol. 56 ›› Issue (1): 126-131.DOI: 10.11930/j.issn.1004-9649.202107126

基于子模块电容电压允许值的MMC均压控制策略

张彬桥¹, 李成¹, 李振兴¹, 肖博文², 刘闯², 王飞²

1. 三峡大学电气与新能源学院，湖北宜昌 443002;
2. 国网湖北省电力有限公司荆门供电公司，湖北荆门 448000

收稿日期:2021-08-02 修回日期:2022-12-06 出版日期:2023-01-28 发布日期:2023-01-14
作者简介:张彬桥(1978-),男,博士,副教授,从事电力系统继电保护与控制研究,E-mail:zbq@ctgu.edu.cn
基金资助:
国家自然科学青年基金资助项目（52007102）

A Voltage Balancing Control Strategy for Modular Multilevel Converter Based on Allowable Capacitance Voltage of Sub-modules

ZHANG Binqiao¹, LI Cheng¹, LI Zhenxing¹, XIAO Bowen², LIU Chuang², WANG Fei²

1. College of Electrical Engineering and New Energy, Three Gorges University, Yichang 443002, China;
2. Jingmen Power Supply Company, State Grid Hubei Electric Power Co., Ltd., Jingmen 448000, China

Received:2021-08-02 Revised:2022-12-06 Online:2023-01-28 Published:2023-01-14
Supported by:
This work is supported by the National Natural Science Foundation of China Youth Fund Project (No.52007102).

摘要/Abstract

摘要： 针对模块化多电平变换器（modular multilevel converter，MMC）传统子模块（sub-module，SM）均压策略存在的开关频率高、开关损耗量多、计算量大等问题，提出基于子模块电容电压允许值的均压控制策略。通过引入电容电压允许值变量，使得SM电压始终在规定的范围内运行，降低了功率器件损耗。与此同时，由于不需要每个控制周期对全部SM进行排序，进一步减少了控制策略的计算量。通过仿真结果验证了所提策略的有效性，可以显著减少单位时间内功率器件的开关次数。

关键词: 模块化多电平变换器, 子模块电容电压均衡, 开关频率, 允许值

Abstract: Aiming at the problems of high switching frequency, large switching loss and large amount of computation in traditional voltage balancing strategy for modular multilevel converter (MMC), an improved capacitor voltage balancing control strategy is proposed. The sub-module (SM) voltage is constantly kept in the specified range through introducing the allowable value variable of capacitor voltage, consequently reducing the loss of power devices. In the meantime, all the sub-modules need not to be sorted in each control cycle, thus further reducing the amount of computation of the control strategy. Finally, the Matlab/Simulink-based simulation is carried out and the results show that the proposed strategy can significantly reduce the switching times of power devices per unit time.

Key words: modular multilevel converter, sub-module capacitor voltage balancing, switching frequency, allowable value

张彬桥, 李成, 李振兴, 肖博文, 刘闯, 王飞. 基于子模块电容电压允许值的MMC均压控制策略[J]. 中国电力, 2023, 56(1): 126-131.

ZHANG Binqiao, LI Cheng, LI Zhenxing, XIAO Bowen, LIU Chuang, WANG Fei. A Voltage Balancing Control Strategy for Modular Multilevel Converter Based on Allowable Capacitance Voltage of Sub-modules[J]. Electric Power, 2023, 56(1): 126-131.

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基于子模块电容电压允许值的MMC均压控制策略

A Voltage Balancing Control Strategy for Modular Multilevel Converter Based on Allowable Capacitance Voltage of Sub-modules

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基于子模块电容电压允许值的MMC均压控制策略

A Voltage Balancing Control Strategy for Modular Multilevel Converter Based on Allowable Capacitance Voltage of Sub-modules

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