A novel load-flow analysis for stable and optimized microgrid operation

Ali Elrayyah, Yilmaz Sozer, Malik E. Elbuluk

Research output: Contribution to journalArticle

47 Citations (Scopus)


This paper proposes a novel load-flow analysis (LFA) algorithm for droop-based islanded microgrids (DBIM). The standard LFA is not applicable for DBIM due to the absence of a node with fixed reference voltage. As the voltage in the islanded microgrid depends on the droop relations, these relations are included as part of the load-flow equations. The proposed LFA is used with particle swarm optimization to select the droop parameters that optimize the reactive power sharing. Voltage compensation terms are also suggested to improve voltage regulation. By using the proposed LFA, a modeling procedure is suggested to check the stability and stabilize the microgrid. The effectiveness of the proposed methods is verified through different simulation studies.

Original languageEnglish
Article number6774974
Pages (from-to)1709-1717
Number of pages9
JournalIEEE Transactions on Power Delivery
Issue number4
Publication statusPublished - Aug 2014


  • Islanded microgrid
  • load-flow analysis
  • microgrid modeling and stability
  • particle swarm optimization (PSO)
  • power sharing
  • voltage regulation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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