Robust partial feedback linearizing stabilization scheme for three-phase grid-connected photovoltaic systems

M. A. Mahmud, H. R. Pota, M. J. Hossain, N. K. Roy

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

This paper presents a robust stabilization scheme for a three-phase grid-connected photovoltaic system to control the current injected into the grid and dc-link voltage to extract maximum power from photovoltaic (PV) units. The scheme is mainly based on the design of a robust controller using a partial feedback linearizing approach of feedback linearization, where the robustness of the proposed scheme is ensured by considering uncertainties within the PV system model. In this paper, the uncertainties are modeled as structured uncertainties based on the satisfaction of matching conditions. The performance of the proposed stabilization scheme is evaluated on a three-phase grid-connected PV system in terms of delivering maximum power under changes in atmospheric conditions.

Original languageEnglish
Article number6612674
Pages (from-to)423-431
Number of pages9
JournalIEEE Journal of Photovoltaics
Volume4
Issue number1
DOIs
Publication statusPublished - Jan 2014
Externally publishedYes

Keywords

  • Grid-connected photovoltaic (PV) system
  • matching conditions
  • nonlinear controller
  • partial feedback linearizing scheme
  • structured uncertainty

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