Cost function‐based modulation scheme of model predictive control for VIENNA rectifier. Issue 14 (24th October 2019)

• Record Type: Journal Article
• Authors: Dang, Chaoliang; Tong, Xiangqian; Song, Weizhang; Han, Yuchao; Wheeler, Pat
• Is Part Of: IET power electronics. Volume 12:Issue 14(2019)
• Page Start: 3646
• Page End: 3655
• Publication Date: 2019-10-24
• Subjects: rectifiers -- PWM rectifiers -- electric current control -- switching convertors -- predictive control -- power convertors -- power grids -- PWM invertors -- PWM power convertors -- harmonic distortion; cost function‐based modulation scheme -- model predictive control -- finite control -- grid‐connected converters -- multiobjective control -- conventional FCS‐MPC -- variable switching frequency -- high current ripple -- computational burden -- efficient operation frequency current model predictive -- fixed operation frequency current model predictive -- CFM‐MPC -- three‐phase three‐level VIENNA rectifier -- mathematical model -- deadbeat control -- different voltage vectors -- voltage vector reference -- switching action time -- cost function value -- selected vectors -- space vector pulse -- modulation schemes -- optimum voltage vector; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2019.0546
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : Finite control set model predictive control (FCS‐MPC) has been widely used in the control of grid‐connected converters with the advantages of fast dynamics, multi‐objective control, and easy implement. However, the conventional FCS‐MPC bears with variable switching frequency, high current ripple and computational burden. An improved current model predictive with the cost function‐based modulation scheme (CFM‐MPC) is proposed for a three‐phase three‐level VIENNA rectifier to improve the power quality. First, the mathematical model and voltage vector are given according to the principle of deadbeat control. Then, the voltage vector of different voltage vectors are selected according to the location of the voltage vector reference, and the switching action time of the selected are directly calculated by the inversely proportional with cost function value of the selected vectors. It remains the merits of both the conventional MPC and space vector pulse width modulation schemes to track the optimum voltage vector without increasing the computational burden. Finally, a comparative study with the proposed CFM‐MPC and conventional FCS‐MPC has been conducted to verify the superiority of the proposed scheme. The results show the proposed CFM‐MPC has the advantages of lower power ripple, fixed switching frequency, lower total harmonic distortion and neutral point potential balance.