Grid integration of large DFIG-based wind farms using VSC transmission

L. Xu, L. Yao, C. Sasse

Research output: Contribution to journalArticlepeer-review

436 Citations (Scopus)


This paper describes the use of voltage source converter (VSC)-based HVDC transmission system (VSC transmission) technology for connecting large doubly fed induction generator (DFIG)-based wind farms over long distance. The operation principles of the proposed system are described, and new control strategies for normal and grid fault conditions are proposed. To obtain smooth operation, the wind farm side VSC (WFVSC) is controlled as an infinite voltage source that automatically absorbs power generated by the wind farm and maintains a stable local ac network. Fault ride through of the system during grid ac faults is achieved by ensuring automatic power balancing through frequency modulation using WFVSC and frequency control using DFIG. PSCAD/EMTDC simulations are presented to demonstrate robust performance during wind speed and power variations and to validate the fault ride through capability of the proposed system.
Original languageEnglish
Pages (from-to)976-984
Number of pages9
JournalIEEE Transactions on Power Systems
Issue number3
Publication statusPublished - Aug 2007


  • automatic control
  • automatic generation control
  • wind farms
  • power conversion
  • HVDC power convertors


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