Research And Implementation Of Solar Tracking System Based On FPGA

With the development of society and economy, energy demand is increasing.Energy structure based on fossil energy can not satisfy the needs of sustainabledevelopment any more. Humanity face serious energy shortage and environmentalissues of burning fossil fuels. Based on this; application of solar energy technologybecomes research focus. However, the solar energy has the special characteristicsthat solar light energy density is low, intermittent and spatial distribution is changing.So this paper studies on solar tracking technology. Solar tracking system can reducethe angle between sun incident light and incidence of solar cell arrays. It canimprove the utilization of solar radiation and reduce the cost of power generationsystem.Firstly, the development of solar tracker and the principle of solar tracking in theworld are introduced. This paper has proposed the tracking strategy composed of thesolar trajectory and optical tracking. It can achieve automatic tracking with a widerange of sun.Secondly, elevation-azimuth angle tracking device is designed. The componentsof the selection and design of the hardware are completed using the control strategyaccording to the solar tracking system.Thirdly, according to the requirements of the design, the software of the systemis completed in this FPGA platform. Solar trajectory algorithm achieving, opticaltracking of image processing and the step motor driving are included.Finally, the hardware and software experiments show that the proposed controlmethod, the design of the solar tracking controller's hardware and software arepracticable. The system has lots of advantages such as simple structure, runningsmoothly and high tracking precision.