Exploration And Realization Of MPPT Based On PE - Expert3 Control System

With the growing demand for energy, energy’s shortage problem emerges gradually, the traditional fossil energy cannot satisfy the human society needs of the development any more. In order to prevent the energy crisis, as the representative of new energy solar energy gain more and more attention, it’s application is becoming more and more widely. Photovoltaic power generation is the main trend of solar energy utilization, in order to improve the power efficiency, introduced MPPT algorithm in a photovoltaic system is very important. In this paper, the research content mainly is divided into:for the pv cells was1. The system is analyzed the physics of the solar cell array and the mathematical model theoretically, studing the output characteristic of photovoltaic array under the different external conditionsby using the seted a simulation model, and analyzes the different shadow’s influence on the photovoltaic battery output characteristic.2. On the basis of introducing several traditional MPPT algorithm detailly, Put forward an improved variable step length of P&O maximum power tracking algorithm, and using the simulation software MATLAB/SFNMULINK to sinmulink several traditional algorithm and modified variable step size P&O maximum power tracking algorithm, the simulation experiment prove theoretically the feasibility of the algorithm.3. Hardware experiment was carried out, completed a little power Boost booster circuit boards and other hardware, Japan My Way company production of PE-Expert high-speed control system as the core, design 100w small photovoltaic power generation system of photovoltaic system development platform, and the calibration experiment was carried out. at the same time,doing an experiment on the system by using P&O, the instantaneous scanning method and the improved variable step size P&O maximum power tracking algorithm are three MPPT algorithm, verifing the feasibility of the several MPPT algorithm on the basis of experiment, comparingand three MPPT algorithm under the control of single phase photovoltaic system development platform in the last, the results reached the expected purpose.