Impact of wind-speed ramps on turbines: from fluid-dynamic to aeroelastic simulation, via observed joint statistics

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Abstract

This report documents DTU contributions to Carbon Trust’s Offshore Wind Accelerator (OWA) project, entitled “OWA Impact of Gusts on Loads and Power Production”; it was subcontracted through the Fraser-Nash Consultancy (‘FNC’). The focus of DTU’s work—and the original design of the project—is detection of wind speed ramps and statistical characterization of their relevant metrics, and their effects on a wind farm. The latter is done through a model chain including large-eddy simulation coupled to constrained Mann-model turbulence simulation and the aeroelastic code Flex5; the simulated wind farm and models’ configurations were chosen to compare with the Rødsand 2 (R2) windfarm. FNC analysed limited SCADA and mast data from R2, whereas DTU’s work used data from Høvsøre; this is because the R2 mast data was from heights below hub and did not cover 1 year—thus making it unusable for ramp statistics affecting the current generation of wind turbines. In terms of the OWA project, this report covers work package 2 (‘event detection’) and WP3 (‘modelling’).
Original languageEnglish
PublisherDTU Wind Energy
Number of pages43
ISBN (Electronic)978-87-93549-62-3
Publication statusPublished - 2019
SeriesDTU Wind Energy E
Number0194

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