Study On MPPT Control Method Of Photovoltaic Generation System

According to the photoelectric conversion principle, a mathematical model of photovoltaic cells is established, and a simulation model of photovoltaic cells is established and simulated by using the Matlab/Simulink software, for analyzing its output characteristics under different light, temperature, shade and series-parallel conditions.On the basis of the output characteristics of the photovoltaic cells power generation systems, this paper researches the principles and applications of MPPT technology. According to the analysis and simulation of the principle of MPPT technology, it shows that, in a complex environment, traditional MPPT technology is prone to have judges mistakes and falls into local optimum situation. Based on the principle analysis of optimization, the particle swarm optimization (PSO) is widely used for its simple and easy implementation. In order to improve the performance of the MPPT algorithm based on PSO algorithm, the chaos variable is introduced into PSO algorithm, and the inertia variables of PSO algorithm are lead to set and improve the performance of PSO algorithm. Based on the improved PSO algorithm with good performance, its application in MPPT control technology, to achieve accurate tracking the maximum power in the shade has conducted the thorough research.Finally, the applicability and advantages of the above methods are verified, and the simulation of MPPT method and admittance increment method based on the improved PSO algorithm is carried out by using Simulink software. The results show that the improved MPPT algorithm based on the PSO algorithm has good accuracy and superiority.