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

Rachid Errouissi, Ahmed Al-Durra, S. M. Muyeen

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1933-1942
Number of pages10
JournalIET Power Electronics
Issue number9
Publication statusPublished - Jul 27 2016
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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