Variable gain control scheme of DFIG-based wind farm for over-frequency support

Yujun Li, Zhao Xu, Jianliang Zhang, Kit Po Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

36 Citations (Scopus)


In order to mitigate over-frequency events in the power systems, this paper proposes a new variable gain based control strategy to maximize the frequency support while minimizing impacts to the overall energy production for a wind power plant (WPP). Because of different wind conditions, the energy production by each WT is not equally compromised by adaptively adjusting the droop gains according to the different rotor speeds so that minimal reduction of energy production can be ensured. The control performance was fully investigated in a doubly fed induction generator (DFIG) based WPP and the results clearly indicate the proposed variable droop gain scheme can harness more wind energy than the conventional same droop gain scheme while providing similar frequency support.

Original languageEnglish
Pages (from-to)379-391
Number of pages13
JournalRenewable Energy
Publication statusPublished - 1 May 2018


  • Doubly fed induction generator (DFIG)
  • Droop gain
  • Energy cost
  • Frequency regulation
  • Wind turbine

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment


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