DYNAMICS ANALYSIS OF FLOATING OFFSHORE WIND TURBINE SYSTEM CONSIDERING DIFFERENT WIND TURBINE SIZE

Abstract

This paper investigated the response of semi-submersible type floating offshore wind turbine (FOWT) for different wind turbine size in order to evaluate cost reduction effect of large turbine size. Firstly, semi-submersible floaters for 2MW, 5MW, and 10MW were modeled based on the design used at Fukushima FORWARD demonstration project. Then, dynamic analysis was performed in DLC 6.1 case and it was confirmed that the floater response were almost same response and that mooring force increased with larger turbine. Finally, equipment cost per rated power was evaluated for different turbine sizes by using the weight of built model. The cost reduction effect were quantitatively evaluated for equipment cost and construction cost.