Natural period design consideration for tension leg platform wind turbine

To date, tension leg platform (TLP) wind turbine is one of the potential methods for accessing offshore wind resource in moderately deep water. Appropriate natural period is most important to the TLP motion. In this paper, the TLP parameter's effect to natural period based on NREL 5 MW wind turbine in special sea situation is analyzed, and the result shows that surge period is more sensitive to concrete ballast height and draft height; however, they have opposite effect to the surge period in available range; spoke length makes the pitch period induce and other fours do it increase as parameters increase; spoke diameter has a limited effect on heave and pitch period and obvious effect on the surge period; draft diameter has a obvious effect to interval of heave period, and it can cover other parameter range. The parameter's effect to period has active effect to the future design of TLP wind turbine.