Optimized model predictive control strategy of modular multilevel converter

被引：0
|
作者：
Huang Z. [1 ]
Xia X. [1 ]
Zhao X. [1 ]
Liu Y. [1 ]
Shi C. [1 ]
Chen Y. [1 ]
Xiao Z. [1 ]
Cao B. [1 ]
机构：
[1] College of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Energy analysis; Model predictive control; Modular multilevel converter; Unbalanced grid condition;
D O I：
10.11817/j.issn.1672-7207.2020.01.011
中图分类号：
学科分类号：
摘要：
In order to ensure the safe and stable operation of MMC-HVDC system, the unbalanced energy distribution between arms and the increase of capacitance energy fluctuation of sub-module appear in MMC under unbalanced grid condition were analyzed, and an optimized model predictive control(OMPC) of MMC based on energy analysis was proposed. The OMPC was adopted based on the internal energy analysis of MMC under unbalanced grid condition. For AC side phase current, MMC internal circulation and sub-module capacitance voltage, three independent control stages were designed to avoid weight selection. Finally, the simulation results were verified by MATLAB/SIMULINK software. The results show that the control strategy proposed in this paper not only effectively controls the external characteristics of MMC, but also realizes the internal energy control of MMC. © 2020, Central South University Press. All right reserved.
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页码：86 / 93
页数：7
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