Dynamics analysis of the power train of 650 kW horizontal-axis tidal current turbine

Power trains are an important component of the tidal current energy conversion systems; however, variable drive-torque and unbalanced moments produced by flow shear turbulence cause power to vibrate. When scale turbine increases, vibration problem becomes prominent. The dynamic characteristics complex. In this study, train a 650 kW horizontal-axis was studied. adopted low-speed-ratio semi-direct drive scheme proposed Zhejiang University. A mathematical model constructed. influence external excitations (including condition, moments, internal excitation) on studied using simulations sea trials. simulation results showed that radial torsional vibrations low- high-speed shafts increased when velocity increased. fluctuation range bearing load under increases in pitch yaw moments. meshing motion planetary gear plays leading role shafts. validated comparing experiment simulation.