Research On Solar Energy Photovoltaic Grid-connected System

In this paper, put the solar photovoltaic power generation system as the main object of study. First, analyze the solar photovoltaic power generation and output characteristics of the basic principles, Since the solar photovoltaic cells is effected by environmental temperature and light intensity, the maximum power point tracking to improve efficiency of solar photovoltaic cells.Secondly, the more popular maximum power point tracking control algorithm is studied, based on this proposed discrete unsteady step search method. In the start-up phase and light intensity changes, using regular non-constant step search algorithm,Changes in light intensity with time duty hours to achieve maximum power point tracking, Therefore, the maximum power point to avoid power fluctuations caused by the annex to the power loss. Using PSIM simulation software simulate the algorithm, demonstrate the feasibility of the method.Again, studies of the PV inverter performance and structure, In this paper proposes duplex Bridge inverter structure,and using deadbeat control method, using Matlab simulation platform to validate the control method .Finally, on this basis, design a control core based TMS320F2812 DSP 200W solar photovoltaic power generation system. Using Matlab SIMULINK simulation platform, on the solar photovoltaic system was simulated...