Study On The Independent Photovoltaic Power Generation Controller Based On TMS320F2812

Energy is the basis for the survival and development of human beings, along with the progress of society, the growing demand for energy. And the traditional coal, oil, natural gas and other non renewable energy not only limited reserves and pollute the environment, so the development of new energy has been the main problem facing human society. Solar energy as a clean, renewable, inexhaustible new energy has become a main source of energy for the21st century, and the current photovoltaic power generation is the mainstream of the application of solar energy, but the efficiency of photovoltaic power generation is around the world need to work together to solve problems.This paper studies a kind of independent photovoltaic power generation controller based on TMS320F2812, the main controller integrated with MPPT and SPWM algorithm, in order to make the photovoltaic maximum power point, compares the advantages and disadvantages of several commonly used MPPT algorithm, and through the MATLAB of photovoltaic cells and the MPPT algorithm are analyzed, after adding the MPPT algorithm to obtain the photovoltaic cell the maximum power output characteristics, by comparing the temperature, light wave output characteristics on the incremental conductance method and the improved perturbation mutation, the improved incremental conductance method as the MPPT algorithm; in order to make the system simple and stable, the single-stage boost inverter for AC output circuit, the circuit uses large inductance, charge and discharge a large capacity to boost the purpose, and joined the SPWM algorithm through zero vector with the algorithm, which is based on the circuit design, by changing the time interval through zero vector can achieve the purpose of adjusting the boost. With PC by RS485connection is established, the PC real-time monitoring controller parameters, and all information display parameters on the PC software written by C#. This software through ADO.Net and SQLserver2008database for data connection, all the data stored in the database, for query and analysis.Through the simulation analysis, the improved incremental conductance MPPT algorithm, in external environment mutation quickly reached and stable in the vicinity of the maximum power point, improve the utilization of solar energy, using a straight through the SPWM algorithm for zero vector inverter output is stable and reliable, and add it to the PC monitor, saving artificial maintenance costs, and indirectly increase the efficiency of photovoltaic power generation.