Arm Current Control Strategy of Modular Multilevel Converter Based on Continuous Control Set Model Predictive Control

Zhen WANG; Xianggen YIN; Yu CHEN; Jinmu LAI; Guanqun SUN

doi:10.7500/AEPS20190811002

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Arm Current Control Strategy of Modular Multilevel Converter Based on Continuous Control Set Model Predictive Control

Basic Research | 更新时间：2025-06-16

- Arm Current Control Strategy of Modular Multilevel Converter Based on Continuous Control Set Model Predictive Control
- Automation of Electric Power Systems Vol. 44, Issue 10, Pages: 85-91(2020)
- 作者机构：
  
  强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市 430074
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;Hubei Provincial Natural Science Foundation of China
- DOI：10.7500/AEPS20190811002
  CLC：
- Received：11 August 2019，
  
  Revised：2019-11-06，
  
  Published Online：08 April 2020，
  
  Published：25 May 2020
- 稿件说明：
移动端阅览
王祯,尹项根,陈玉等.基于连续控制集模型预测控制的MMC桥臂电流控制策略[J].电力系统自动化,2020,44(10):85-91.

WANG Zhen,YIN Xianggen,CHEN Yu,et al.Arm Current Control Strategy of Modular Multilevel Converter Based on Continuous Control Set Model Predictive Control[J].Automation of Electric Power Systems,2020,44(10):85-91.
王祯,尹项根,陈玉等.基于连续控制集模型预测控制的MMC桥臂电流控制策略[J].电力系统自动化,2020,44(10):85-91. DOI： 10.7500/AEPS20190811002.

WANG Zhen,YIN Xianggen,CHEN Yu,et al.Arm Current Control Strategy of Modular Multilevel Converter Based on Continuous Control Set Model Predictive Control[J].Automation of Electric Power Systems,2020,44(10):85-91. DOI： 10.7500/AEPS20190811002.

摘要

模块化多电平变换器(MMC)的桥臂电流控制方法可同时实现交流侧电流控制和环流抑制。连续控制集模型预测控制(CCS-MPC)是一种时域内基于模型的最优控制方法，动态响应快，可以实现多频带复合信号的准确跟踪。提出一种基于CCS-MPC的桥臂电流控制方法，通过设计模型预测控制(MPC)控制器同时实现桥臂电流直流分量、基频交流分量的准确跟踪和倍频环流的抑制，克服了传统分频控制策略在暂态期间不同控制器相互影响的问题，无须对各个频率信号单独设计控制器，简化控制结构。在此基础上，提出了包含桥臂电流指令值计算、基于MPC的桥臂电流控制和子模块电容电压均压控制的MMC综合控制策略。最后，在MATLAB/Simulink中搭建三相MMC仿真模型，验证了所提控制策略的可行性和有效性。

Abstract

The arm current control method for modular multilevel converter (MMC) can simultaneously accomplish AC-side current control and circulating current suppression control. Continuous control set-model predictive control (CCS-MPC) is an optimal control method based on system model in time domain. It has fast dynamic response and can accurately track multi-band compound signals. In this paper

an arm current control strategy based on CCS-MPC is presented. The designed model predictive control （MPC） controller can simultaneously realize the accurate tracking of DC component and fundamental-frequency AC component of bridge arm current

and suppress multiple-frequency circulating currents. The interaction problem between different bandwidth controllers during transient state of conventional arm current control is eliminated. Besides

there is no need to design a separate controller for each frequency signal

therefore the control structure is simplified. On this basis

a comprehensive control strategy of MMC is proposed

which includes reference value calculation of arm current

MPC based arm current control and balancing control of sub-module capacitor voltage. Finally

a three-phase MMC simulation model is built in MATLAB/Simulink to verify the feasibility and effectiveness of the proposed control strategy.

关键词

Keywords

references

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