Design And Implementation Of Digital Control Scheme For Hybrid Photovoltaic Systems

With the rapid development of economy, human consumption on energy is increasinghighly. The energy we current use is mostly fossil energy which is renewable energy. As thedemand of energy the energy crisis showed up. To solve this problem we need to find a cleanenergy as the alternative energy, while the solar energy becomes the first choice of alternativeenergy. This paper researches a hybrid photovoltaic system to transfer solar energy to electricenergy and exploited.According to the problems of photovoltaic system, the digital control scheme of a hybridphotovoltaic system is designed and implemented. The hybrid photovoltaic system uses thesolar energy and the mains electricity composite power supply for the load. According to thefunction requirements and performance index, system requires through the liquid crystalscreen can monitor the conditions of the battery on real time to realize the no juncture powersupply between the solar energy and the utility, and continuous power supply for the load,automatic control the conditions of the whole system.Firstly, the digital control scheme of the hybrid photovoltaic system is designed onrequest. The implementation of no juncture power supply module and battery capacity checkmodule are focused designed. What’s more, charge module, discharge module, select moduleand LCD module are also designed.Secondly, the hardware platform of mixed photovoltaic system is achieved by usingATmega16L as the control chip, using DS2432to test the battery power, and choosingcapacitance as the energy storage components of no juncture power supply module to achievethe no juncture power supply of the system. At last, all the modules are tested, the test value isin agreement with the design requirements.On the basis of photovoltaic system, design and select system implementation plan tomeet the needs of daily system requirements, the daily system through calculates the heightand angle of the sun to track it. This paper designs the overall implementation project of dailysystem, selects the hardware model, and draws the hardware circuit.