Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2018-03-20

Journal: IET POWER ELECTRONICS

Included Journals: SCIE

Volume: 11

Issue: 3

Page Number: 610-617

ISSN: 1755-4535

Key Words: rectifiers; predictive control; control system synthesis; bridge circuits; deadbeat controller design; single-phase cascaded H-bridge rectifier; voltage balancing modulation; single-phase CHB rectifier; finite-control-set model predictive control method; FCS-MPC method; DB controller design; zero current error; redundancy-based modulation strategy

Abstract: The model predictive control (MPC) is a promising control method for cascaded H-bridge (CHB) rectifiers. One well-known MPC method is the finite-control-set MPC (FCS-MPC). However, three main issues arise in FCS-MPC: heavy computational burden, low steady-state performance, and time-consuming tuning work of weighting factor. Here, an alternative MPC method, deadbeat (DB) control with a capability of voltage balance, has been proposed for a single-phase CHB rectifier. The proposed method is based on the DB solution to obtain zero current error at the sampling instant and the use of a redundancy-based modulation strategy for voltage balance, leading to the ease of controller design and elimination of tuning work. The proposed method has been evaluated against FCS-MPC method on a single-phase three-cell CHB rectifier. The experimental results show that a reduced computational burden, an improved steady-state performance, and a comparable dynamic response can be achieved in the proposed method in comparison with FCS-MPC method.