Design And Simulation Study Of Stand-alone Photovoltaic Flywheel Power System

With the energy crisis and environmental pollution becoming more and more serious,the development of clean and efficient new energy technology has become the subject of research by scientists all over the world.Solar energy,as a typical renewable clean energy,has great prospects for development.But solar energy is a kind of distributed energy,which is difficult to collect and store energy.At present,it is more common to convert the solar energy into electric energy storage through the photovoltaic power generation system.Because of the unbalanced energy reserve,the quality of distributed energy generation is different.If the power is connected to the grid forcibly,it may impacts the power grid.Therefore,the stand-alone photovoltaic power generation system can make better use of solar energy for power generation.Energy storage system is also an important part of stand-alone photovoltaic power generation system.Flywheel energy storage system is a kind of energy storage method which uses motor to drive flywheel to realize the electric energy to mechanical energy.It has the advantages of long service life,short charging time,pollution-free and easy maintenance.This paper combines photovoltaic power generation with flywheel energy storage,designs a clean and pollution-free stand-alone photovoltaic power generation system,and makes full use of their advantages to realize the effective use of electric energy.The specific work is as follows:Firstly,this paper analyzes the background and significance of photovoltaic power generation and flywheel energy storage technology,discusses the research status and key technology development of photovoltaic power generation and flywheel energy storage technology at home and abroad,and clarifies the general structure of the paper;secondly,the output characteristics of solar cells,including P-V characteristics and I-V characteristics,as well as different light intensity and different light intensity,are studied in depth.The mathematical model of the solar cell is deduced under the condition of temperature,and the simulation model of the solar cell is established by using MATLAB/Simulink.Then,the working principle of the main circuit of Boost is simply introduced,and the parameters of the main circuit are determined,and the Boost is built by PSIM software.The main circuit model is built and simulated.The maximum power point tracking(MPPT)method is described in detail,and the disturbance observation method is selected as a typical method to adjust the whole circuit.The simulation model of the whole system is built by PSIM software,and good simulation results are obtained.Then,the flywheel energy storage is introduced.The structure and working principle of the system are described,and its control theory and control method are described.Finally,the structure of the stand-alone photovoltaic flywheel power generation system is analyzed,the capacity of stand-alone photovoltaic flywheel system is designed and the energy management strategy is given.