Investigation on long-term extreme response of an integrated offshore renewable energy device with a modified environmental contour method

Li, Liang and Yuan, Zhi-Ming and Gao, Yan and Zhang, Xinshu and Tezdogan, Tahsin (2019) Investigation on long-term extreme response of an integrated offshore renewable energy device with a modified environmental contour method. Renewable Energy, 132. pp. 33-42. ISSN 0960-1481 (https://doi.org/10.1016/j.renene.2018.07.138)

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Abstract

Considering the massive simulations required by the full long-term analysis, the environmental contour method is commonly used to predict the long-term extreme responses of an offshore renewable system during life time. Nevertheless, the standard environmental contour method is not applicable to the wind energy device due to the non-monotonic aerodynamic behaviour of the wind turbine. This study presents the development of a modified environmental counter method and its application to the extreme responses of a hybrid offshore renewable system. The modified method considers the variability of the responses by checking multiple contour surfaces so that the non-monotonic aerodynamic behaviour of the wind turbine is considered. The hybrid system integrates a floating wind turbine, a wave energy converter and two tidal turbines. Simulation results prove that the modified method has a better accuracy.

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