A Research on Improving Charge Performance of Solar Energy Generation System

• Main Authors: Zih-Hao Liao, 廖子豪
• Other Authors: 黃秉鈞
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/38301766693220591927

碩士 === 臺灣大學 === 機械工程學研究所 === 98 === The research focuses on how to enhance charge performance of solar cell power generation system, for use in solar LED lighting systems. First, discuss lead-acid battery charge characteristics under high ambient temperature. Second, investigate increasing energy storage of solar cell generation system by paralleling supercapacitor. Third, design Li-ion battery charge and discharge cycle-use controller. Finally, discuss the cost of using temperature-controlled box to place different batteries. Lead-acid battery cycle-use life must rapidly decline when operating in high ambient temperature. For prolonging lead-acid battery cycle-use life, this research used temperature-controlled box to place lead-acid battery under optimal temperature operation point. Outdoor experimental results indicate that lead-acid battery in parallel supercapacitor system can improve the charge efficiency of solar cell power generation system. Then use effects of changes in radiation to explain why paralleling supercapacitor can improve the charge efficiency. After that, use solar cell charging model to simulate under radiation rapid changing. From the results, both simulation and outdoor experimental result show that paralleling supercapacitor can increase storage energy. For improving solar cell generation system’s reliability, this research builds the dynamic models of Li-ion battery and designs a PI controller to limit the charge voltage. Choose the best battery under high ambient temperature. Then compare with the cost of lead-acid and of Li-ion battery match or do not match the temperature-controlled box.