Comparison of Resource and Energy Yield Assessment Procedures 2011-2015: What have we learned and what needs to be done?

Niels Gylling Mortensen, Morten Nielsen, Hans Ejsing Jørgensen

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    Abstract

    From 2011 to 2015, the European Wind Energy Association arranged four open exercises to benchmark the wind resource and wind farm energy yield assessment procedures of the wind energy industry. Two case studies were for land-based Scottish wind farms in hilly to complex terrain, and two case studies for medium- to large-scale offshore wind farms in the Irish Sea. A total of 157 submissions were received, 97 land-based and 60 offshore, and all four exercises were analysed and presented previously by DTU Wind Energy.
    Results are summarised here for each of seven specific steps in the resource and energy yield assessment procedure: Site wind observation, long-term extrapolation, vertical extrapolation, horizontal extrapolation, wake modelling, technical losses estimation, uncertainty estimation and calculation.
    For each step and each wind farm a summary is given of the magnitude of the effects, the spread of the predictions, the methodologies used, and some general, qualitative conclusions. For one offshore wind farm, Barrow, the predicted yield was found to be 104% of the observed yield, with a spread of predictions of 3%.
    Based on the results of the four case studies and the statistics of the submitted data, two priori-tised lists of actions that could be taken in order to improve the overall process in the most cost-effective way are given; one for land-based and one for offshore wind farms.
    Original languageEnglish
    Title of host publicationProceedings of the EWEA Annual Event and Exhibition 2015
    Number of pages10
    PublisherEuropean Wind Energy Association (EWEA)
    Publication date2015
    Publication statusPublished - 2015
    EventEWEA Annual Conference and Exhibition 2015 - Paris, France
    Duration: 17 Nov 201520 Nov 2015

    Conference

    ConferenceEWEA Annual Conference and Exhibition 2015
    Country/TerritoryFrance
    CityParis
    Period17/11/201520/11/2015

    Bibliographical note

    Paper for poster presentation

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