Research And Realization Of Photovoltaic Fuel Cell System

With the rapid development of society,energy and environmental crisis more and more serious,this phenomenon makes people on the new energy research and utilization is imminent.In recent years,the application of solar energy is relatively wide,but photovoltaic power generation has some shortcomings,when the light intensity is insufficient or rainy days,it will seriously affect the photovoltaic cell power generation,which will bring a considerable obstacle to its application.Reasonable combination of fuel cells and photovoltaic cells,the light intensity can be continuously lower than the average time,so that the output curve of photovoltaic cells will not be a large fluctuation.Therefore,the efficient operation of PV fuel cell systems will be the top priority of this research.At present,China's photovoltaic power generation applications have been very mature,on the fuel cell scientific research is also increasingly perfect,and the research of photovoltaic fuel cell system is still in the simulation stage.In this paper,the characteristics of PV fuel cell system and its subsystems are analyzed and studied,which provides a theoretical basis for the use of photovoltaic fuel cells.In this paper,the basic theory of photovoltaic cells is expounded,and the advantages and disadvantages of several commonly used methods for preparing hydrogen are compared.The method of electrolysis of hydrogen is selected,and the reaction principle and process are introduced.The basic principles and reaction processes of the fuel cell are listed.Then,the equivalent circuit model of the photovoltaic cell and the photovoltaic cell power generation system with the maximum power tracking(MPPT),the mathematical model of the water electrolysis cell and the electrochemical model of the fuel cell are introduced.According to the equivalence relation and mathematical model of each module,the steady state and dynamic simulation model are established in Matlab software,and the influencing factors of the output characteristics of each subsystem are obtained and the performance analysis and research are carried out.According to the fuel cell capacity requirements set specific parameters,analysis of the entire model of the simulation results and obtain the hydrogen flow rate to make the system work efficiently,then to complete the theoretical study of photovoltaic fuel cell system and implementation.