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Abstract
The implementation and integration of new methods and control techniques to floating offshore wind turbines (FOWTs) have the potential to significantly improve its structural response. This paper discusses the idea of integrating oscillating water columns (OWCs) into the barge platform of the FOWT to transform it into a multi-purpose platform for harnessing both wind and wave energies. Moreover, the OWCs will be operated in order to help stabilize the FOWT platform by means of an airflow control strategy used to reduce the platform pitch and tower top fore-aft displacement. This objective is achieved by a proposed complementary airflow control strategy to control the valves within the OWCs. The comparative study between a standard FOWT and the proposed OWC-based FOWT shows an improvement in the platform’s stability.
Highlights
Winds and breezes occur between land and sea due to differential heating and pressure and, it is best to install wind turbines in coastal areas
The work in this paper focuses on the vibration dynamics of the floating offshore wind turbines (FOWTs) that are more related with waves
The effect of using the proposed airflow control can be seen in both airflows of OWC1 and OWC2 in the red curves, which have been compared to the airflow of the uncontrolled system, where the valves are always open in the blue curves
Summary
Winds and breezes occur between land and sea due to differential heating and pressure and, it is best to install wind turbines in coastal areas. Due to the rarity of coastal lands and coastal residential concentrations, offshore wind turbines are proving to be the best alternative. Offshore wind resources are known to be of higher quality than those on land [1]. Global wind power development has been progressively switching to being offshore. Nearshore wind farms have been developed in past years but were criticized for visual and noise pollution [2], and their foundations are relatively big, complex, and costly [3]. With no space restrictions and stronger and steadier wind resources, deep-sea wind farms have greater potential to be exploited. Many approaches have been developed for load mitigation and can be classified into two categories
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