Improved inertia and frequency support from grid-connected DFIG wind farms: 2011 IEEE/PES Power Systems Conference and Exposition

I. Azmy Gowaid, A. El-Zawawi, M. El-Gammal

Research output: Chapter in Book/Report/Conference proceedingConference contribution

76 Citations (Scopus)


Several techniques have been suggested to enhance the ability of multi-megawatt DFIG wind turbines to contribute in arresting system frequency decay and provide primary control power upon power imbalances. Among such techniques, the capability of temporary active power over-production was shown to be useful in limiting the initial frequency dip in hydro dominated systems. However, the excess active power production is followed by an acceleration period whose negative effect on system frequency profile is analyzed herein. This paper suggests an improved technique generalized for slow-response power systems. This technique not only avoids the acceleration period, but also reduces the frequency excursion and injects primary frequency control power until secondary control takes up the power imbalance. Moreover, a means of obtaining a power reserve from DFIG WFs at low wind speed is analyzed and quantified. The dynamic model of a sample slow-response power system is built in which all the presented techniques are tested for different wind penetration levels. The results of calculations indicate the reduced frequency nadir and improved support obtained from DFIG-WFs for all wind speeds, in a manner compliant with the current requirements of system operators.
Original languageEnglish
Title of host publication2011 IEEE/PES Power Systems Conference and Exposition
Subtitle of host publicationProceedings of a meeting held 20-23 March 2011, Phoenix, Arizona, USA.
Number of pages9
ISBN (Electronic)9781612847887
ISBN (Print)9781612847894
Publication statusPublished - 23 Mar 2011
Event2011 IEEE PES Power Systems Conference and Exposition - Phoenix, United States
Duration: 20 Mar 201123 Mar 2011


Conference2011 IEEE PES Power Systems Conference and Exposition
Abbreviated titlePSCE 2011
Country/TerritoryUnited States


  • asynchronous generators
  • wind power
  • active power over production
  • grid connected DFIG wind farm
  • slow response power system
  • wind penetration
  • wind turbine
  • Frequency control
  • mathematical model
  • power system dynamics
  • rotors
  • wind speed
  • wind turbines
  • doubly-fed induction generators
  • load frequency control
  • system-wide ancillary services
  • variable speed wind turbines
  • wind power generation


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