Robust control strategy for PV system integration in distribution systems

M. J. Hossain*, T. K. Saha, N. Mithulananthan, H. R. Pota

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

This paper proposes a decentralized control strategy for higher penetration of photovoltaic (PV) units without violating system operating constraints. A systematic procedure is developed and a robust controller is designed to ensure both dynamic voltage and transient stability for a specific PV integration level. The change in the model due to the volatile nature of PV generations is considered as an uncertain term in the design algorithm. Simultaneous output-feedback linear quadratic controllers are designed for PV generators. This designed control scheme is robust with respect to intermittency and enhances the integration level in a sub-transmission and distributed system. The effectiveness of the proposed controller is verified on a 43-bus industrial meshed distribution system under large disturbances. It is found that the designed control scheme enhances stability and increases the renewable integration levels.

Original languageEnglish
Pages (from-to)355-362
Number of pages8
JournalApplied Energy
Volume99
DOIs
Publication statusPublished - Nov 2012
Externally publishedYes

Keywords

  • Decentralized control
  • Distributed generation
  • Generation and load uncertainties
  • Photovoltaic (PV) generators
  • Voltage constraints

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