Modeling And Simulation Of Three-phase Grid Type Photovoltaic Inverter

Energy depletion and environmental pollution problems have become increasingly serious today, the study of photovoltaic systems in the world has become a hot research. In this paper, a three-phase photovoltaic system for the study of the various components of the PV system were studied, including the modeling of photovoltaic cells, maximum power point tracker, inverter control technology.In this paper, the characteristics of photovoltaic cells, the equivalent circuit diagram based on the design of a PV simulation models. Get a different light and battery performance parameters and output characteristics at different temperatures according to the standard parameters of the battery combined environmental correction. Simulation results show that under different environmental simulation models can achieve a relatively good results. In order to make full use of solar energy, the paper uses a fuzzy logic control the maximum power point tracking. This method is easier to implement and does not require a mathematical model of the system. Because it has better control performance, so in practice more and more attention.For photovoltaic power plants connected to the grid when trying to use photovoltaic inverter's own ability to regulate reactive power compensation system for the solar power plant generating reactive power problem,Aimed to compensate the reactive power of PV power plant connected to grid, the reactive power control strategy is given. And the photovoltaic power plants P-? curve is analyzed to save cost for reactive power compensation device costs and reduce line losses. The effectiveness and practicality of the given control strategy is evaluated based on an actual PV power plant in Qinghai Province.