A novel fault-tolerant DFIG-based wind energy conversion system for seamless operation during grid faults

Parag Kanjiya, Bharath Babu Ambati, Vinod Khadkikar

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

A novel fault-tolerant configuration of doubly fed induction generator (DFIG) for wind energy conversion systems (WECSs) is proposed in this paper for the seamless operation during all kinds of grid faults. The proposed configuration is developed by replacing the traditional six-switch grid-side converter (GSC) of DFIG with a nine-switch converter. With the additional three switches, the nine-switch converter can provide six independent output terminals. One set of three output terminals are connected to the grid through interfacing inductors to realize normal GSC operation while, the other set of three output terminals are connected to neutral side of the stator windings to provide fault ride-through (FRT) capability to the DFIG. An appropriate control algorithm is developed for the proposed configuration that: 1) achieves seamless fault ride-through during any kind of grid faults and 2) strictly satisfies new grid codes requirements. The effectiveness of the proposed configuration in riding through different kind of faults is evaluated through detailed simulation studies on a 1.5-MW WECS.

Original languageBritish English
Article number6678777
Pages (from-to)1296-1305
Number of pages10
JournalIEEE Transactions on Power Systems
Volume29
Issue number3
DOIs
StatePublished - May 2014

Keywords

  • Doubly fed induction generator (DFIG)
  • grid faults
  • neutral side converter
  • seamless fault ride-through (seamless FRT)
  • unbalance
  • wind turbine (WT)

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