| With the advancement of society and the improvement of science and technology,the energy structure based on fossil raw materials has been unable to meet the growing needs of human beings.In addition,the destruction of the environment caused by the massive use of fossil energy,in order to protect the environment on which humans depend,To achieve sustainable development of energy,large-scale development and utilization of new energy has become a social development trend.Among them,renewable energy such as wind energy and solar energy has attracted much attention due to its abundant resources,clean and pollution-free,and wind energy and solar energy have been widely used due to their inherent advantages.However,wind and solar energy have some relative drawbacks,such as the impact of weather and weak power supply stability.In order to eliminate their drawbacks,we can use wind energy and solar energy to complement each other in time,season and region to combine wind power and solar power to obtain relatively efficient and stable electricity.The study of the maximum power tracking control link and the stability of power generation in wind-solar hybrid power generation systems has become important.In the article,the wind-solar hybrid power generation system is the subject of research.Firstly,by constructing the mathematical model of wind power generation part,photovoltaic power generation part and storage battery,the working principle of the wind power generation part and the storage battery are analyzed.Based on this,the wind power generation and photovoltaic power generation part are simulated by Matlab/Simulink,and the output characteristics of the simulation are obtained.The curve was analyzed.Through analysis,it is concluded that the battery has the function of balanced wind and light hybrid power generation output,which can slow down system fluctuations and improve the quality of the wind-solar hybrid power generation system.Combined with wind turbines and photovoltaic cells,it can form a wind-solar hybrid power generation system to better optimize system energy.Transmission.Secondly,based on the introduction of wind power and photovoltaic power generation simulation models,the method and principle of maximum power tracking are proposed.Several typical wind power and photovoltaic power generation maximum power tracking strategies are studied,By comparing the advantages anddisadvantages of different strategies,the gradient power disturbance observation method and the adaptive variable step disturbance observation method are proposed to track and control the maximum power points of wind power generation and photovoltaic power generation respectively.The feasibility of the improved algorithm is verified by simulation.Finally,through the analysis of the battery control strategy,the charge and discharge strategy suitable for the battery of this system is determined.The lead-acid battery energy storage system uses a bidirectional DC/DC inverter to connect with the wind-solar hybrid power generation system.In order to better and more quickly stabilize the capacitor terminal voltage,the purpose of rapidly adjusting the DC-side current and stabilizing the output power of the hybrid hybrid power generation is achieved,The bidirectional DC/DC inverter adopts a double closed loop PI control structure,that is,a current inner loop control is added in the voltage control loop.Finally,the overall model architecture of the wind-solar complementary DC microgrid is constructed by using various subsystem models.The Simulink simulation is used to verify the correctness and stability of the battery in the whole microgrid system.Figure [46] Reference [61] Table [3]... |
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