| The hydraulic oscillating float wave energy device is suitable for various sea conditions.The mainstream wave energy device has the characteristics of high maturity,easy modular design,convenient delivery and recovery,and adaptability to various sea conditions.It detects buoys and wave energy in the ocean Freshwater preparation,wave energy power generation and other fields are widely used,which is an important method in the use of wave energy.The sea state has the characteristics of complexity,variability and randomness,so that the output energy quality of the wave power generation device is not high and the long-term efficiency is lower than the data measured in the laboratory.In this paper,the wave condition,single float hydraulic point absorption wave energy generation device,electric load and efficiency analysis are studied on the single float hydraulic point absorption wave energy generation device.The chapter 1 analyzes the current status and existing problems of wave energy power plants at home and abroad.Focusing on the analysis of the development status and application of the hydraulic point wave energy absorption device in the oscillating float wave energy device Aiming at the problem of improving the energy harvesting efficiency of the oscillating float device under long-term wave conditions,the research are proposed.Chapter 2 analyzes the long-term regional distribution of wave energy resources(decades),the annual change of wave conditions(years),the random wave simulation based on characteristic parameters(minutes,seconds),and the wave load acting on the float according to the time scale.(With memory effect)Analyze the effect of wave conditions on the working state of the single-buoy hydraulic point wave energy absorption device.Firstly,the wave energy resources are reviewed,and the wave conditions are analyzed and simulated.Through the analysis of the long-term wave condition time series data,combined with the two-dimensional random wave simulation,the long-term changes of the actual wave surface elevation are simulated.According to the short-term stationary characteristics of the wave conditions,the moving average method is used to predict and analyze the short-term random wave statistical parameters meaning wave height and average wave power.The wave load calculation method under the assumption of micro-amplitude wave theory and cylindrical float is analyzedThe chapter 3 analyzes the structure,energy harvesting mechanism and operating characteristics of the nonlinear hydraulic energy conversion system of the single float hydraulic point energy absorption device,and analyzes the single float hydraulic point energy absorption device.The dynamic characteristics and impedance characteristics of a single-float hydraulic oscillation energy harvesting device are analyzed.The relationship between the steady-state response and the damping coefficient to the energy-absorbing bandwidth of a single-float hydraulic point absorber under regular wave conditions is analyzed.In Simscape,a simulation model of a single float hydraulic point absorbing wave energy power generation device was established to analyze the response characteristics of the hydraulic system.The effects of different draft quality and damping on the wave energy capture power of the float and the output power of the hydraulic motor are analyzed.Chapter 4 analyzes the micro-grid energy storage technology based on the use of wave energy devices in ocean observation systems,offshore buildings,remote islands,and marine renewable energy multi-energy complementation.The permanent magnet generator and battery are analyzed and simulated,and the energy storage device of battery and super capacitor is introduced.The energy storage device is used to cut the peaks and fill the valleys of the changing wave conditions to maintain the balance between supply and demand under the change of the annual wave power to meet the normal work needs of the microgrid or electric load.Chapter 5 introduces the method of changing the quality of the float and changing the damping of the hydraulic motor load on the efficiency and adopting multiple sets of loads to adapt to the changing wave conditions to improve the efficiency of the oscillating float device. |
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