A Verification of Two-Axis HCPV Solar Tracking Control using Solar Position Algorithm

• Main Authors: Chi-Hung Liao, 廖啓宏
• Other Authors: Stephen P. Tseng
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/wtqeq2

碩士 === 國立臺北科技大學 === 機電整合研究所 === 104 === In various solar photovoltaic technologies, High Concentrating PhotoVoltaic (HCPV) systems with high power III-V group solar cells, is one of the lower cost solar power generation systems. Because III-V group solar cells can absorb direct sunshine within only an angle of 0.3˚~0.8˚, high-precision 2-axis tracking control system has to be applied in order to achieve the best efficiency of solar power generation. The content of this research is based on the Solar Position Algorithm (SPA) and uses a Delta PLC to develop the automatic tracking system. The demonstration specifications require that elevation operates between 0 to 70 degrees and azimuth rotates in the range of 270 degrees. In outdoors testing, the initialization of solar tracking system requires a level meter for horizontal positioning, and a compass for the orientation. The high precision angle measurement equipment, together with the SL1 sensor from Green Mount have been used to interpret deviation angles. Experimental data shows that this developed 2-axis solar tracking system can achieve an average track deviation angle less than 0.3˚ (±0.275˚ in elevation, ±0.0087˚ in azimuth) and satisfied the original design goals (accuracy of 0.3˚). Using the system developed by this study, HCPV with the acceptance angle of 0.5˚ can be applied in the future design of high precision SPA based 2-axis automatic solar-tracking system.