Design Of Solar Photovoltaic Power Generation Automatic Control System

With the continuous reduction of the oil, coal and natural gas and other fossil fuels, the importance of renewable energy is increasing, people pay attention to its development and utilization. Research and practice shows that the direct solar radiation energy to the Earth’s is abundant and widely distributed, it also can be regenerated, what’s more, it does not pollute the environment, it is the ideal alternative energy, all countries are actively developing the use of solar energy, solar power has become the fastest growing technology in the world. However, solar energy is not easy to collect, it has low energy density and it varies with the change of season, weather, day and night, etc.. For these disadvantages, solar power generation efficiency is low, solar power inefficiency has become an important factor for restricting the use of solar energy. Therefore, the efficient use of solar energy is a key issue for solar power. Currently, most of the solar panel array is fixedly mounted, so it cannot always enable that the solar panel to keep vertical with sunlight so as to it cannot make full use of solar energy, the power generation efficiency is low.A sun tracking system is built by horizontal coordinate. A method based on use of sun angle tracking and light intensity sensor is proposed. Light intensity sensor is the principal part of the system. Its detection results are used to determine weather situation, control the start-stop of the tracking system. Motion orbit of the sun is calculated by astronomical formulas to determine the orientation of the sun. The msp430f149chip is used as the main control part to output signals to drive ptz to enable the solar panel to keep uprightness with sunlight. The purposes of enhancing sunlight radiation, improving the power generation efficiency of photovoltaic systems and reducing the cost of photovoltaic power generation are realized. Different tracking interval time is set in different time periods to improve the tracking accuracy of the system. The debugging results prove that this system is simple and easy to achieve. And it can be used in large-scale photovoltaic power plant project.