The Study On Hydraulic Drive System Of Wind And Wave Complementary Power Generation

With the consumption of traditional energy,environmental pollution problems and energy crisis gradually intensified,the development of clean renewable energy has become the consensus of all countries.Wind energy is widely distributed and mature in renewable energy,and has become the fastest growing renewable energy source;The wave energy content is huge,sustainable development and utilization,no pollution to the environment and also has great prospects for development and utilization.However,wave energy and wind energy have the characteristics of low power density.Therefore,comprehensive development and utilization of wind energy and wave energy can optimize China’s energy layout.While alleviating the problem of energy supply shortage,it can improve the stability of energy supply and has a very positive significance.This paper mainly designs and analyzes the hydraulic transmission system of the intermediate energy conversion device in wind power generation and wave energy generation system.Firstly,aiming at the shortcomings of traditional wind turbines,this paper proposes a new type of hydraulic transmission wind turbine,and establishes a corresponding mathematical model for the vertical axis wind turbine and hydraulic components,and builds a simulation model based on the mathematical model established by the system.The dynamic characteristics of the system were simulated and analyzed by MATLAB/AMESIM software.The simulation results show that although the front-end impeller speed changes drastically with the wind speed fluctuation,the output speed of the generator is still very stable.In addition,for the problem that the hydraulic transmission type wind turbine is unstable under variable working conditions,this paper proposes group controllable storage.The concept of the energy device shows that the scheme can significantly improve the stability of the system and improve the utilization of wind energy.Then,this paper designs a float hydraulic cylinder wave energy generating device with two-way work.The modularly arranged float hydraulic cylinder energy-harvesting device collects the hydraulic energy into the mother tube and then accumulates the energy stored in the accumulator and transmits it to the hydraulic motor.The hydraulic motor drives the generator to rotate the output electric energy.In the wave energy generating device,the influence of accumulator parameters(volume and pre-inflation pressure)on the power generation system is mainly studied.The research shows that the larger the accumulator volume,the more obvious the accumulator voltage regulation effect;the accumulator pre-inflation pressure The higher the parameter,the faster the response time of the system.Finally,this paper discusses the implementation of wind and wave complementation,and proposes a new energy coupling device,which uses two degrees of freedom differential gear train to achieve energy gathering on the front side of the generator.Because the differential gear train has two degrees of freedom,there is no mutual influence between the two input terminals,which can realize the maximum energy transmission.In addition,there is only one generator and one set of electrical system at the back of the system,which can reduce the redundancy of the system.The redundancy increases the utilization rate of the device.The simulation results of the differential gear train system show that the scheme is feasible and can provide a reference for energy coupling of multi-energy power supply systems.