Interactive Grid Interfacing System by Matrix-Converter-Based Solid State Transformer With Model Predictive Control

被引:34
作者
Liu, Yupeng [1 ]
Liu, Yushan [2 ]
Ge, Baoming [3 ]
Abu-Rub, Haitham [2 ]
机构
[1] China Agr Univ, Coll Informat & Elect Engn, Beijing 100083, Peoples R China
[2] Texas A&M Univ Qatar, Dept Elect & Comp Engn, Doha 23874, Qatar
[3] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA
关键词
Modulation; Cost function; Predictive models; Switches; Voltage control; Support vector machines; Informatics; Matrix converter; model predictive control; power management; solid state transformer; voltage unbalance; POWER ELECTRONIC TRANSFORMER; SOURCE-BASED COMMUTATION; ENERGY; DRIVE;
D O I
10.1109/TII.2017.2679137
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
The back-to-back connection of two three-to-single-phase matrix converters (MCs) through a high-frequency transformer to create the so called MC-based solid state transformer (SST) for interactive grid interfacing is proposed in this paper. The solution provides single-stage bidirectional ac-ac power conversion. There are advantages of no lifetime-limited storage capacitors, light weight, and compact volume. The conventional modulation methods of this MC-SST system require additional control design for power management. Besides, space vector modulation contains sophisticated voltage and current vectors computation and duty cycle composition, considering the two back-to-back connected three-to-single-phase MCs. In this paper, a model predictive control (MPC) is proposed for this MC-SST linking different ac grids. The proposed MPC predicts the state variables based on the discrete model of MC-SST system and the present circuit variables, and then selects an optimal switching state that ensures the smallest value of a cost function, for the next sampling time. Simulation and experimental studies are carried out to demonstrate effectiveness and simplicity of the proposed MPC for such MC-SST grid-interfacing system.
引用
收藏
页码:2533 / 2541
页数:9
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