Remaining Life Assessment of Offshore Wind Turbines subject to Curtailment

Anand Natarajan, Troels Friis Pedersen

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The fatigue damage reduction versus energy production loss trade-off analysis is demonstrated on a Vestas V-52 turbine by de-rating the turbine power over a specific period corresponding to high measured turbulence using a spinner mounted anemometer. Based on the measured blade root and tower base loads, the benefit of curtailment under high turbulence on lowering the fatigue damage is quantified. A cut-off mean turbulence intensity level of 16% at 15m/s or class-A conditions is chosen as the turbulence level to impact tower base fatigue damage reduction. The turbulence is measured using a spinner anemometer mounted on the V-52. It is shown that the tower base foreaft damage equivalent moments can at some mean wind speeds be reduced by as much as 30%. The reduction in the blade root damage equivalent moment is not significant for power set point based curtailment. The learnings from this power curtailment strategy based
on measured turbulence are extended to an offshore wind farm study case to demonstrate its benefit to life extension or CAPEX reduction of offshore sub structures.
Original languageEnglish
Title of host publicationProceedings of the Twenty-eighth (2018) International Ocean and Polar Engineering Conference
PublisherInternational Society of Offshore & Polar Engineers
Publication date2018
ISBN (Print)978-1-880653-87-6
Publication statusPublished - 2018
Event28th International Ocean and Polar Engineering Conference (ISOPE 2018) - Sapporo, Japan
Duration: 10 Jun 201815 Jun 2018


Conference28th International Ocean and Polar Engineering Conference (ISOPE 2018)
SeriesProceedings of the International Offshore and Polar Engineering Conference


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