Research On Led Lighting System Based On Photovoltaic Power Generation Technology

Nowadays, in which is short of resources, lighting electricity consumption should not be underestimated, electricity for lighting our basic account for20%of the electricity consumption, so saving electricity for lighting is an important way to solve the power shortage. Solar energy is a clean energy, environmental protection, have obvious advantages, but as a new generation of green solid LED cold light illumination is also a wide range of application fields. With the increase of population, social and economic development, people are also rising consumption, and therefore, the research and development of green energy-efficient lighting is bound to create a new field. For electricity for lighting our current situation, we choose to study the solar photovoltaic technology based LED lighting system. Solar-power supply, LED light source as perfect, green energy and new light load combination to achieve the energy saving lighting system. Solar system can achieve maximum power point tracking, and intelligent battery charging and discharging of intelligent control and switching, and LED lighting load levels can be achieved according to the battery charge status.The main research works conducted in this thesis are as follows:(1) Discussed the current photovoltaic technology and LED lighting technology, outlined the status quo power LED lighting applications, as well as solar PV at home and abroad, and on this basis, analyzes the development trend of solar LED lighting.(2) On the basis of theoretical research on the technology proposed the general scheme of the system, analyzes the maximum power point tracking and battery charge and discharge principle. System includes AVR microcontroller as the core control system, intelligent solar maximum power point tracking system, smart battery charging and discharging systems, LED driving system.(3) Completed the hardware design of the system. Designed a solar cell maximum power point tracking circuit intelligent, based on the battery charge and discharge circuit UC3906based intelligent dimming circuit XL6003LED.(4) According to the function of the system software development is completed. Main software systems including system, battery charge and discharge electronic procedures, LED lighting subroutines, SCM and other related MPPT algorithm.Final experiment tested the system, and to analyze the results, identify inadequacies and improve the system and provide a reference for the future direction of improvement.