Mooring and power cable system for current-turbine

This paper discusses device stability and cable stress of “Twin Turbine Marine Current Generator”. To confirm the stability of the device by V-shaped mooring system, computer simulation and model experiment are performed. Subsequently, using results of the computer simulation in a severe situation, the stresses applied to the dynamic cable are calculated with “OrcaFlex9.6a”. The results of computer simulation and model experiment shows that the device can be moored stably with V-shaped mooring system even if current velocity or direction changes suddenly, and the computer simulation is useful to evaluate motion of the device. Furthermore, the result of cable stress calculation with OrcaFlex9.6a shows that no cable stress closes in on breaking stress if cable configuration is appropriate, and a configuration that fixes the cable to the mooring line at multi points is the safest style in the candidates calculated in this paper.