Improved Model Predictive Current Control of Single-Phase Five-Level PWM Rectifier

Yifeng Zhu, Hao Yue, Hailong Zhao and Huichun Xu
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Yifeng Zhu: School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China
Hao Yue: School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China
Hailong Zhao: School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China
Huichun Xu: School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China

Energies, 2020, vol. 13, issue 9, 1-14

Abstract: In this paper, a single-phase five-level rectifier with coupled inductors is studied. First, a discrete mathematical model of a single-phase five-level rectifier is created in two-phase( αβ ). A traditional single vector finite control set model predictive control (FCS-MPC) algorithm is improved to overcome the problems of a varying switching frequency, the large amount of time needed for calculation, and the inaccurate setpoint of current loop tracking. Then, the objective function of the system is established, and a simple objective function is used instead of an iterative optimization of the traditional FCS-MPC algorithm. At the same time, to eliminate the delay error and to reduce harmonic distortion, deadbeat control technology is introduced. Finally, the simulation and experimental results show that the improved model predictive current control algorithm not only retains the fast response of traditional model predictive control, but also has the advantages of fixed switching frequency, small calculation time, and small current steady-state error.

Keywords: single-phase five-level rectifier; FCS-MPC; fixed switching frequency; small calculation time (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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