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基于连续控制集模型预测控制的MMC桥臂电流控制策略
Arm Current Control Strategy of Modular Multilevel Converter Based on Continuous Control Set Model Predictive Control
- 电力系统自动化-方正平台 2020年44卷第10期 页码：85-91
- 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：
王祯(1994—)，女，博士研究生，主要研究方向：电力电子在电力系统中的应用。E-mail：wangzhen2016@hust.edu.cn
尹项根(1954—)，男，博士，教授，博士生导师，主要研究方向：电力系统继电保护与控制、电力电子在电力系统中的应用。E-mail：xgyin@hust.edu.cn
陈玉(1990—)，男，通信作者，博士，主要研究方向：电力电子在电力系统中的应用、电力系统继电保护。E-mail：ChenYu_Huster@hust.edu.cn
- 基金信息：国家自然科学基金资助项目(51877089);湖北省自然科学基金资助项目(2018CFB580)
DOI：10.7500/AEPS20190811002
中图分类号：收稿日期：2019-08-11，
修回日期：2019-11-06，
网络出版日期：2020-04-08，
纸质出版日期：2020-05-25
- 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.
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references
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