Research On Heave Floating Wave Power Generation Device Based On Optimal Energy Capture

Due to the pollution and non-renewable problems of the fossil energy,researchers around the world dedicate effort to developing the renewable and clean energy technology,and the wave energy generator is an important research orientation among them.In order to improve the energy acquisition efficiency and the power quality of the wave power generation,this paper studies the shape of the float is studied based on the theory of micro-amplitude wave and the cylindrical float is selected as the energy acquisition level.Furthermore,the random wave theory and the APSO algorithm are used to optimize the float structure parameters.Finally,a two-stroke work hydraulic energy storage system is proposed on the basis of the single-stroke work hydraulic energy storage system.Therefore,the energy acquisition efficiency of the heave floating wave power generation device is improved,and to some extent,the quality of power generation has been stabilized.The main work in this paper is organized as follows:Firstly,the basic principle and the working state of various representative wave energy generating devices domestically and abroad are introduced.The analysis method of the fluidsolid coupling and the classification of energy storage system of the wave energy generating device are briefly described.Finally,the accumulator is used for storage.the heave float wave power generation device with the accumulator for energy storage is regarded as the research target.Secondly,the fluid-solid coupling problem and micro-amplitude wave theory are studied,and the evaluation way of the float energy acquisition degree is determined.The Froude-Krefa method(FK method)for the cylindrical float and the cuboid float is studied.And the cylindrical float is chosen as a better shape of the float since it suffers more stress according to the simulation results through AWQA software.Thirdly,because of the limited application range of micro-amplitude theory,the parameters of the float are optimized based on the stochastic wave theory and the APSO algorithm.The "resonance frequency" is chosen as the optimization target,and two float structure parameters are optimized by APSO algorithm.A conclusion can be drawn that the energy acquisition efficiency is relatively improved after optimization through simulation based on AQWA sofeware.Finally,on the basis of the single-stroke work hydraulic energy storage system,a two-stroke hydraulic work system is proposed.The force parameters obtained in the previous research are selected to calculate the main component parameters of the two energy storage systems.The above two systems are analyzed through AMESim.A conclusion can be drawn that the energy conversion efficiency of the two-stroke hydraulic work system is higher and the hydraulic motor speed can be stabilized to some extent.