View Item 

Offset-free feedback linearisation control of a three-phase grid-connected photovoltaic system

Access Status
Open access
Authors
Errouissi, R.
Al-Durra, A.
Muyeen, S.M.
Date
2016
Type
Journal Article

Metadata
Show full item record
Citation
Errouissi, R. and Al-Durra, A. and Muyeen, S.M. 2016. Offset-free feedback linearisation control of a three-phase grid-connected photovoltaic system. IET Power Electronics. 9 (9): pp. 1933-1942.
Source Title
IET Power Electronics
DOI
ISSN
School
Department of Electrical and Computer Engineering
Remarks

© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

URI
Collection
Abstract

In this study, a state feedback control law is combined with a disturbance observer to enhance disturbance rejection capability of a grid-connected photovoltaic (PV) inverter. The control law is based on input-output feedback linearisation technique, while the existing disturbance observer is simplified and adopted for the system under investigation. The resulting control law has a proportional-integral (PI)/almost PI-derivative-like structure, which is convenient for real-time implementation. The objective of the proposed approach is to improve the DC-bus voltage regulation, while at the same time control the power exchange between the PV system and the grid. The stability of the closed-loop system under the composite controller is guaranteed by simple design parameters. Both simulation and experimental results show that the proposed method has significant abilities to initiate fast current control and accurate adjustment of the DC-bus voltage under model uncertainty and external disturbance.