Hydraulic System Development And Power Performance Study Of Wave Energy Power Supply Device For Mooring Platform

Mooring platform is an infrastructure for carrying floating marine instruments and equipment that can realize the functions of ocean observation,monitoring,surveillance,communication,etc.It can solve the problem of lack of efficient,long-range,reliable and safe maritime communication means in China.Restricted by offshore conditions and energy supply technologies,the current adopted methods such as wind energy,solar energy,and storage batteries cannot provide stable and continuous power for the floating platform.Energy bottlenecks restrict the large-scale promotion and long-term stable operation of the floating platform.Wave energy is a reliable and renewable energy.China has abundant sea reserves.The development of wave energy for marine use and adapting to local conditions and applying it to marine instruments is the main way to solve the problem of power consumption of floating platforms.The wave power supply device developed in this thesis is integrated into the main body of the floating platform.With reference to the mature independent oscillation float WEC,the energy capture structure,power characteristics,hydraulic system and control strategy of the device are studied and adaptively improved.The realization scheme is optimized through theoretical analysis,numerical simulation and model experiment.The wave power supply device developed in this thesis is integrated into the main body of the floating platform.With reference to the mature independent oscillation float WEC,the energy capture structure,power characteristics,hydraulic system and control strategy of the device are studied and adaptively improved.By using theoretical analysis,numerical simulation and model experiment,the realization plan is optimized.Firstly,the background and significance of the subject are discussed,and the wave energy power generation technology is summarized.The characteristics and applicability of the oscillating float WEC are mainly described,and the research progress and technical difficulties are analyzed in detail.For the main structure of floating platform,the structural design and adaptable transformation of wave power supply device is carried out and finite element analysis of the device structure is conducted to ensure that the structural strength meets the integration requirements.By analyzing wave motion and energy theory,incident wave velocity potential,dynamic pressure and energy equation are derived.The diffraction and radiation problems are considered and the wave force on the floating body is analyzed.The force of the floating body is analyzed to determine the main structure of the floating body.The energy capture mechanism is studied and the influencing factors of steady-state motion are analyzed.The motion of the floating body is studied in the time and frequency domains.The influencing factors of energy trapping characteristics are determined.Numerical analysis of the influence of various factors on the energy-trapping characteristics of the floating body is made to determine the best structure and shape parameters of the floating body.The output characteristics of the PTO system is studied,the best output conditions are determined,the degree of influence of the system parameters on the output characteristics of the PTO system is studied,and the system damping and stiffness parameters are set reasonably.The function and realization process of the wave energy hydraulic system are analyzed and the system transmission scheme is formulated.The system work and control process are analyzed to formulate system logic control plan.A land experimental electronic control system for system debugging and testing is designed.Power generation management and control system and working mode control system plan are formulated to realize the monitoring and control of the actual work of the device.Storage energy generation experiment is carried out to verify the feasibility of intermittent storage power generation scheme.AMESIM simulation model of hydraulic system is established to improve the stability of motor speed and output power and optimize the optimal setting parameters such as accumulator and throttle.The process of energy storage and power generation is simulated and analyzed and feasibility is demonstrated.The submerging process of the floating body powered by Hydraulic pump and accumulator is simulated and studied respectively.Finally,the full text is summarized and the research prospect is put forward.This thesis develops and optimizes the mechanical structure and hydraulic system of the wave power supply device suitable for the mooring platform,studies the effects of the shape parameters of the floating structure and the PTO system parameters on the system power characteristics and demonstrates the feasibility of wave energy device to supply mooring platform,providing a certain theoretical basis for the popularization and application of wave energy on anchored mooring platform.