Design And Study Of Photovoltaic Converter And Maximum Power Point Tracking

As the world constantly reduce the total energy, people growing demand for energy, looking for a clean, efficient energy has become the focus of current people. Due to the wide range of output voltage of solar panels, affected by light, temperature and load is big, so you need to add photovoltaic converter and energy storage equipment, ensure the solar panels to the maximum power output. When sunshine condition inequality under the condition of partial shadow P- V curves appear the phenomenon of multiple peak, photovoltaic converter can not stable work, as well as affecting the service life of solar panels. So to design a can in partial shadow under the condition of accurate recognition and near the maximum power point of maximum power point of global have smaller oscillation of maximum power tracking algorithm is very necessary. This article main research content is as follows:Has chosen to load the photovoltaic battery DC/DC converter topology, design the main parameters of photovoltaic(pv) power device of the converter, set up photovoltaic small signal model of the DC/DC converter, and design the relevant compensator, ensure pv DC/DC converter can achieve rapid output specified requirements.According to the working principle of the solar cell, established the model of the solar panel, analyses the working principle of solar cells. Due to the traditional maximum power tracking algorithm under the condition of oscillation and partial shadow will appear the most power tracing algorithm of mismatch problems, this paper introduced the improvement on the traditional maximum power tracking algorithm, improve the speed and precision of the maximum power tracking, and the accuracy of the algorithm is validated by computer simulation.According to analysis of solar panels in the partial shadow conditions, the output characteristic of the solar panels, established the mathematical model of solar panels. Improved based on the voltage and the power of the triangle window maximum power tracking algorithm, decision condition, shadows are analyzed, the correctness of the algorithm is verified by simulation.To verify the rationality of the design of pv inverter, photovoltaic converter based on the output power of 2100 w on the test. The results showed that the photovoltaic inverter control algorithm and the maximum power tracking algorithm is very effective.