Design and operation of power systems with large amounts of wind power: Final summary report, IEA WIND Task 25, Phase two 2009-2011

Hannele Holttinen, Juha Kiviluoma, André Robitaille, Nicolaos A. Cutululis, Antje Orths, Frans van Hulle, Ivan Pineda, Bernhard Lange, Mark O'Malley, Jody Dillon, E.M. Carlini, C. Vergine, Junji Kondoh, Madeleine Gibescu, John Olav Tande, Ana Estanqueiro, Emilio Gomez, Lennart Söder, J. Charles Smith, Michael MilliganDebbie Lew

    Research output: Book/ReportReport


    This report provides a summary of the results from recent wind integration studies. The studies address concerns about the impact of wind power's variability and uncertainty on power system reliability and costs as well as grid reinforcement needs. Quantifiable results are presented as summary graphs: results as a MW-increase in reserve requirements, or /MWh increase in balancing costs, or results for capacity value of wind power. Other results are briefly summarised, together with existing experience on the issues. There is already significant experience in integrating wind power in power systems. The mitigation of wind power impacts include more flexible operational methods, incentivising flexibility in other generating plants, increasing interconnection to neighbouring regions, and application of demand-side flexibility. Electricity storage is still not as cost effective in larger power systems as other means of flexibility, but is already seeing initial applications in places with limited transmission. Electricity markets, with cross-border trade of intra-day and balancing resources and emerging ancillary services markets, are seen as promising for future large penetration levels for wind power.
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages100
    ISBN (Electronic)978-951-38-7910-5
    Publication statusPublished - 2012
    MoE publication typeNot Eligible

    Publication series

    SeriesVTT Technology


    • wind power
    • wind energy
    • wind integration
    • grid integration
    • reserve requirements
    • capacity credit
    • transmission planning


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