Research On Hydrogen Generation And Energy Storage System Based On Wind-solar Hybrid Power Generation

China’s rapid social and economic development,People’s quality of life is increasing,energy demand is also increasing,resulting in a series of problems such as the shortage of non-renewable energy resources and environmental pollution,in order to alleviate these problems,china is currently committed to the development and utilization of renewable energy,of which solar energy and wind energy are the most widely used,and the technology has gradually matured,because the two have complementary resources in time,the combination of the two can reduce the fluctuation of the system’s output power,but due to the difficulty of grid connection and other reasons that can not absorb the abundant power in time,it is necessary to connect more suitable energy storage system at the back end of the wind-solar complementary power generation system,after comprehensive consideration,hydrogen production from electrolyzed water is chosen as the only way of energy storage in the system.Firstly,this paper introduces the integral composition and advantages of the hydrogen energy storage system of wind-solar hybrid power generation,introduces the classification and basic principle of the wind power generation and photovoltaic generation respectively,and also introduces the working principle and function of the controller and inverter Then three methods of hydrogen production from electrolyzed water are introduced,and the system composition,working process,working principle,storage and transportation of hydrogen production from electrolyzed water in alkaline electrolyzer are described in detail.Secondly,according to the working principle and characteristics of three main parts of the energy storage system,such as photovoltaic panels,wind turbine and Electrolyzer,their mathematical models and Simulink simulation models are established.At last,the influence of light intensity and temperature on the output characteristics of the cell,the influence of wind speed on the wind power and the influence of temperature on the current and voltage of the cell are obtained.The simulation results show that the light intensity has more influence on the power output of the cell than the temperature,the power output of the wind turbine is positively correlated with the wind speed,and the temperature has less influence on the voltage change of the cell,but the current has a great influence on the rate of hydrogen production.Then it is the experimental and simulation study of the wind-solar hybrid power system and the simulation experiment of hydrogen production from electrolyzed water.Based on the experiments of a 1000 W wind turbine and 6 190 w photovoltaic panels in Tianjin in summer,July and January,the conclusion can be drawn as follows: The seasonal complementary characteristics of the wind turbine and photovoltaic system with approximately the same output in Tianjin are slightly stronger than that of a natural day,from the annual power generation of the system,it can be seen that the total power generation is basically supplied by the photovoltaic power generation system independently.The generation capacity of the system increased in summer and autumn,reaching a maximum of31.4 KWh in June.H,the system as a whole does not exhibit complementarity in the sense of principle because the wind power generation system does not contribute much,while an analysis of one day in winter and one day in summer shows that,photovoltaic power generation increases with the increase of light intensity and temperature during the day,and all three show the same trend,while wind turbines,with low wind speed,show occasional power in winter,but because of short duration,the normal power generation requirements were not met.Then,through the simulation experiments on the same type of photovoltaic panels and wind turbines,it is found that the complementary characteristics of wind-solar power generation system are stronger and the output power is more stable in the regions rich in wind and solar energy resources,taking Tibet as an example,the average power output of the same system in each month of the year is about 52 KWh.H fluctuations,far exceeding the level of power generation in the Tianjin area,play a system to make full use of local resources.From the simulation experiment of hydrogen production,it can be concluded that the higher the input current is,the higher the hydrogen production rate is.Therefore,the input current of the front-end power generation system will affect the hydrogen production of the hydrogen storage part,and the hydrogen production can be controlled by adjusting the output current of the power generation system.Finally,an evaluation model of the life cycle economic benefit of the wind-solar hybrid power generation and hydrogen storage system is established,the total operating cost calculation model,the total economic benefit calculation model and the net profit calculation model of the system are established in turn,the net income and unit electricity cost of each year in the payback period and the whole life cycle of the case are obtained,which proves that the wind-solar hybrid power generation system has good economic benefit and certain investment value and development prospect.