Abstract
Recently, the movement of promoting renewable energy is increasingly growing in the world. In this paper, twin-rotor ocean current turbine is adopted as a new generation system by which Japan will be able to use strength of an island country. It is said that stable operation of ocean current turbine is possible basically because of the stability of ocean current. However, ocean current turbine may cause unstable motion at particular situations, while ocean current turbine is floating type and uses single mooring system.Therefore, the motions of the device at the transient state are estimated. As those states, time of startup, ocean current change, and accidents are selected. Especially, concerning the time of startup, a model experiment is conducted and the stable motion of the startup is demonstrated.
