Follow-up Study, The Maximum Power Point Of Photovoltaic Systems Based On Fuzzy Control

Nowadays, with increasing burden on energy exhaustion and environment, as a cleanly and renewable energy, solar energy has become a hotspot in the whole world. The technique of the Photovoltaic conversion has come into the applied level on a large scale.Solar photovoltaic industry will gradually become the main source of energy.This paper selected STP0950S-36 model of independent photovoltaic cells for the study, in order to maximize the use of solar energy as the ultimate goal, the models of independent photovoltaic power generation system of maximum power point tracking control of the theoretical and simulation.Photovoltaic power generation system based photovoltaic array output characteristics of the problem is, this first use of Matlab/Simulink to establish a photovoltaic array simulation model, to solve the complicated process of establishment of photovoltaic array model shortcomings, for the realization of photovoltaic system simulation and system design provide the basis for assurance.Maximum Power Point Tracking (MPPT) method for photovoltaic systems an important means to improve system efficiency. This paper describes the output characteristics of photovoltaic arrays and the simulation model based on the maximum power point tracking method and principle, introduces several common MPPT method, and compare the advantages and disadvantages of these algorithms. Taking into account the solar PV systems are often affected by external factors, it is difficult to determine system parameters, and has a strong non-linear, so this paper, a fuzzy logic control technology for STP0950S-36 type of independent photovoltaic systems to a fuzzy controller design method, and using MATLAB/SIMULINK, fuzzy logic toolbox for simulation tools such as maximum power point control, fuzzy control simulation results of MPPT with fixed step method compared to fixed-step method was found to reach steady There is a certain state after the fluctuation, which results in energy waste, and Fuzzy Control Method for Tracking MPPT fast, good dynamic response, to reach steady state with almost no fluctuation, can be stable, efficient Maximum Power Point Tracking Solar Array Meanwhile, in the sunlight intensity, temperature and other system parameters perturbations, can quickly find a new operating point, to maintain system stability. Simulation results show that the fuzzy control applied to the maximum power point tracking is feasible and has good dynamic and static performance.