Control Strategy of Wave Power System Based on Machine Grid-connected Converter Synergy
In order to realize the efficient and smooth grid access of the wave power generation system,a direct-drive wave power generation device is taken as the research object to establish its mathematical model and grid-connected struc-ture.The output power of the device is decomposed into average and fluctuating components.The optimal strategies un-der damping control and damping elasticity control are further proposed from the point of view of the active control of the power generation system in order to make it operate efficiently.Through the DC-side energy storage configuration and the cooperative control of machine-side and grid-side converters,the smooth entry of power into the grid is realized.The sim-ulation results show that the damped elasticity control is more efficient than the damped control,while the fluctuation is larger,and the DC-side energy storage and the machine-and grid-side cooperative control can effectively smooth the pow-er fluctuation,which can provide a reference for the design of the grid control of the wave power system.
direct-drive wave power generatorgrid-connected structuremachine-to-grid converter synergyoptimal controlpower fluctuation smoothing
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