Use of model predictive controller in dual-loop control of three-phase PWM AC/DC converter

• Published in: International journal of control, automation, and systems Vol. 12; no. 2; pp. 340 - 348
• Main Authors: Kim, Seok-Kyoon, Son, Sung-Yong, Lee, Young Il
• Format: Journal Article
• Language: English
• Published: Bucheon / Seoul Institute of Control, Robotics and Systems and The Korean Institute of Electrical Engineers 01.04.2014; Springer Nature B.V; 제어·로봇·시스템학회
• Subjects: Alternating current; Automation; Control; Control systems; Converters; Direct current; Electric converters; Electric currents; Electric potential; Engineering; Mathematical models; Mechatronics; Numerical analysis; Optimization; Pulse duration modulation; Regular Papers; Robotics; Simulation; Statistical analysis; Voltage; 제어계측공학; dual-loop control; MPC; current control; input constraints; AC/DC converter
• ISSN: 1598-6446; 2005-4092
• DOI: 10.1007/s12555-013-0278-3

In the classical dual-loop voltage control scheme for an AC/DC converter, this paper proposes a simple stabilizing inner-loop model predictive controller (MPC) to regulate the output current and q -frame current to their references. The proposed MPC minimizes a cost function of the tracking error without any use of numerical methods using the specific property of the input matrix of the converter. It is shown that this MPC globally stabilizes the converter in the presence of input constraints. As the same manner of the classical dual-loop control scheme, PI controllers are adopted in the outerloop to regulate the output voltage while maintaining the maximum power factor. The simulation results show that the proposed inner-loop MPC considerably enhances the closed-loop performance despite the load changes.