Research On MPPT Control Technology Of Solar Power Generation System

With the gradual deterioration of the ecological environment and the arrival of energy crisis,traditional energy could no longer meet the needs of this society.Green and innovative solar energy because of the advantages of clean and affordable quickly by the people's attention,how to use solar energy has become an important topic.However,the photovoltaic cells are susceptible to many external environmental factors,so how to improve their efficiency is the first problem to be solved in this study.The paper focuses on the photovoltaic power generation system as the research object,set the goal is how to better improve the photovoltaic power generation efficiency,carried out the corresponding theoretical research and experimental simulation.This paper expounds the research background and significance of the subject,and clarifies the research status of PV industry.Based on the comprehensive analysis of the working principle and output characteristics of PV cells,the equivalent circuit and mathematical model of PV cells are established.The simulation model of PV cells is built in Matlab/Simulink,and many of the existing simulation models do not have good Scalability of the problem,to improve the reuse of a better model,and carried out a case of simulation analysis and verification.The simulation results show the validity and rationality of the model.Based on the simulation model of PV array,four typical DC/DC converters are compared,and the conversion function is calculated by using Boost DC/DC converter and its working principle is analyzed.The simulation model of Boost converter is established under Matlab/Simulink and the feasibility is verified by simulation.The characteristics of the maximum power point tracking control algorithm,which are commonly used in production,are analyzed and analyzed,and their characteristics are analyzed,and their application and its limitations are clarified.Aiming at the problems of common MPPT algorithm,a new MPP T algorithm combining fuzzy control and perturbation observation is proposed.Under Matlab/Simulink,the simulation model based on fuzzy control,disturbance observation and the combination is simulated and simulated.The results show that the new MPPT algorithm has high accuracy and fast response.