Adaptive fuzzy regulation of the DC-bus capacitor voltage in a wind energy conversion system (WECS)

  • Authors:
  • A. L. Elshafei;M. A. Azzouz

  • Affiliations:
  • Electric Power and Machines Department, Faculty of Engineering, Cairo University, Gama Street, Giza, Egypt;Electric Power and Machines Department, Faculty of Engineering, Cairo University, Gama Street, Giza, Egypt

  • Venue:
  • Expert Systems with Applications: An International Journal
  • Year:
  • 2011

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Abstract

This paper proposes a new voltage regulator of the DC-bus capacitor of a variable speed wind power generation system based on adaptive fuzzy system. The change in the fuzzy rule base is done using a variable-structure direct adaptive control algorithm to achieve the pre-defined control objectives. This algorithm has two merits. First, it has a good performance in the training phase as it makes use of the initial rule base defined for the fuzzy logic controller. Second, it has a robust estimator since it depends on variable structure technique. The adaptive nature of the new controller significantly reduces the rule base size and improves its performance.