Abstract
The main problems in energy capture for ocean current energy generator unit are low efficiency and short service life, and it is basic to solve the problems that study on the key design technology of energy capture for ocean current energy generator unit. In this paper, depending on the national marine renewable energy resource special fund project, that is, design and fabrication on a 300kW horizontal axial ocean current energy generator unit, the key design technologies of energy capture for ocean current energy generator unit are studied. The key technologies include design of the efficient blade hydrodynamic profile suitable for running in ocean water, design of the strengthening blade considering alternating stress amplitude due to pressure difference, design of the pitching driver compliance with varies due to current speed or direction, design of accurate algorithm for driving blade rotating conform to current change consisting of consistent pitching and independent pitching as well. Thus, the reliable technology support is provided for high efficient energy capture and long term running of ocean current energy generator unit with the study on the key technologies.
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