Decoupled-DFIG fault ride-through strategy for enhanced stability performance during grid faults

L.G. Meegahapola, Timothy Littler, D. Flynn

Research output: Contribution to journalArticlepeer-review

144 Citations (Scopus)
42 Downloads (Pure)


This paper proposes a decoupled fault ride-through strategy for a doubly fed induction generator (DFIG) to enhance network stability during grid disturbances. The decoupled operation proposes that a DFIG operates as an induction generator (IG) with the converter unit acting as a reactive power source during a fault condition. The transition power characteristics of the DFIG have been analyzed to derive the capability of the proposed strategy under various system conditions. The optimal crowbar resistance is obtained to exploit the maximum power capability from the DFIG during decoupled operation. The methods have been established to ensure proper coordination between the IG mode and reactive power compensation from the grid-side converter during decoupled operation. The viability and benefits of the proposed strategy are demonstrated using different test network structures and different wind penetration levels. Control performance has been benchmarked against existing grid code standards and commercial wind generator systems, based on the optimal network support required (i.e., voltage or frequency) by the system operator from a wind farm installed at a particular location.
Original languageEnglish
Article number5510193
Pages (from-to)152-162
Number of pages11
JournalIEEE Transactions on Sustainable Energy
Issue number3
Publication statusPublished - Oct 2010

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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