Simulation And Performance Analysis Of Wind And Solar Power To Hydrogen System

In recent years,renewable energy and hydrogen energy have developed rapidly.Hydrogen production from renewable energy has become one of the important ways to reduce carbon emissions.The randomness and fluctuation of wind/solar energy have affected the stability and economy of the hydrogen production from renewable energy and restricted its large-scale development.Therefore,it is necessary to think about how to use wind/solar resource to achieve large-scale stable hydrogen production.Hydrogen production from wind and solar power system is a complex process.In order to better analyze the system,the principles of wind power generation,solar power generation,energy storage,hydrogen production and hydrogen storage have been analyzed,mathematical models have been established,and simulation model was established using MATLAB/Simulink software.The operating characteristic of wind turbine and the influence of changes in ambient temperature and solar radiation intensity on the output characteristics of photovoltaic cell are analyzed.In addition,the maximum power tracking control method is used to achieve the maximum power output of wind power generation and solar power generation.On this basis,the structure of the hydrogen production from wind and solar power system is described,and the system simulation model is established using MATLAB/Simulink software to perform real-time dynamic simulation.The simulation result showed that wind power,solar power and wind-solar coupled power have large fluctuation.After the power is compensated by the battery,the power supply becomed smoother.Finally,after the gas is stored and discharged through the hydrogen storage tank,the hydrogen output rate reached a stable state.In order to better analyze the stability of the system,a stability evaluation model was established and used to evaluate the system simulation results.The results showed that the stability of the three systems,from strong to weak,are:wind-solar coupled power to hydrogen system,wind power to hydrogen system,solar power to hydrogen system.Then,the economic benefit and environmental impact of the system are analyzed.The results showed the levelized cost of hydrogen of the wind power,solar power and wind-solar coupled power to hydrogen system are 35.53 CNY/kg H₂,37.12 CNY/kg H₂ and 32.28 CNY/kg H₂,the carbon emission intensity are 0.94 kg CO₂/kg H₂,1.93 kg CO₂/kg H₂and 1.34 kg CO₂/kg H₂.Compared with traditional hydrogen production methods,the hydrogen production from wind and solar power system has a very big advantage in terms of carbon emission reduction,but the competitiveness of economic performance still needs to be improved.With the decline in the cost of renewable energy,the maturity of energy storage technology,the expansion of hydrogen production scale,and the development of low-cost hydrogen storage facilities,the cost of system will gradually decrease.In addition,the system needs to be optimized in terms of capacity configuration and control strategy to make the hydrogen production system more stable.In the future,hydrogen production from wind and solar power generation will develop into an important way for hydrogen production.