Publication: An improved active-front-end rectifier using model predictive control
Date
2015
Authors
Parvez M.
Mekhilef S.
Tan N.M.L.
Akagi H.
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers Inc.
Abstract
This paper investigates an improved active-front-end (AFE) rectifier using model predictive control. The model predictive control (MPC) algorithm utilizes the discrete behavior of the power converter to determine the appropriate switching states by defining a cost function. The performance of the AFE rectifier has been verified with 3.0 kW experimental setup which shows that the efficiency of the MPC controlled AFE-rectifier is 96.82% and is operated with acceptable THD (4.0%) of input current and very low DC voltage ripple. An efficiency comparison is performed between the MPC and VOC-based PWM controller of the AFE rectifier which ensures the effectiveness of MPC controller. Moreover, the stability of the MPC method has been analyzed with the root locus, discrete z-domain frequency response techniques (Nyquist diagram) and non-linear experimental system. The result confirms that, the control system of AFE rectifier is stable as it operates with infinite gain margin and very fast dynamic response. � 2015 IEEE.
Description
Controllers; Cost functions; Efficiency; Electric inverters; Electric rectifiers; Frequency response; Model predictive control; Power electronics; Predictive control systems; Root loci; Ac-dc power conversion; Active front end rectifiers; Active front ends; Efficiency comparisons; Experimental system; Fast dynamic response; Frequency response technique; Stability analysis; Rectifying circuits