Research On Maximum Power Tracking Control System Of Photovoltaic Power System

At present,the demand for energy is increasing day by day,and the reserves of conventional energy are exhausted.As a kind of renewable energy,the development and utilization of solar energy is of great significance for energy conservation,environmental protection and climate change mitigation.However,due to the characteristics of low energy density and discontinuous instability,the solar thermal power generation system has low power generation efficiency and high investment cost.To improve the efficiency of photovoltaic power generation maximum power tracking control technology has become the key to maximize the use of solar energy resources.This paper selects the maximum power tracking control system of photovoltaic power generation system as the research subject,first of all,on the basis of the existing research,the photovoltaic power generation system,the maximum power tracking problem are summarized,comparative analysis of commonly used maximum power point tracking control method of the advantages and disadvantages;then,the maximum power tracking control system given the framework of photovoltaic power generation system and,to complete the design of photovoltaic system maximum power tracking control system core hardware,including the design of DC/DC conversion circuit,controller circuit design and battery circuit design;finally,combined with the basic principle of fuzzy control theory and sliding mode variable structure control,the maximum power point tracking control method based on the fuzzy strategy,and through the simulation of the maximum power point based on the fuzzy strategy tracking control method is verified.Through the research,design the hardware circuit of the controller with maximum power tracking,and the fuzzy method is applied to the MPPT,based on the analytical model of Boost converter and sliding mode variable structure theory,put forward the maximum power point tracking control method based on the fuzzy strategy.Simulation results show that the maximum power point tracking control strategy of fuzzy method can track the maximum power point based on an accurate,high steady-state accuracy and can adapt to the dynamic changes of the environment,oscillation near the maximum power point was significantly reduced,showed good performance,improve system efficiency.