Title :
A high-performance stand-alone solar PV power system for LED lighting
Author :
Huang, B.J. ; Hsu, P.C. ; Wu, M.S. ; Chen, K.Y.
Author_Institution :
Dept. of Mech. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
The present study developed a high-performance solar PV power technology for the LED lighting of a solar home system. The nMPPO (near-Maximum-Power-Point-Operation) design is employed in system design to eliminate MPPT. A feedback control system using pulse width modulation (PWM) technique was developed for battery charging control which can increase the charging capacity by 78%. For high-efficiency lighting, the LED is directly driven by battery using a PWM discharge control to eliminate a DC/DC converter. Two solar-powered LED lighting systems (50W and 100W LED) were built. The long-term outdoor tests have shown that the loss of load probability for full-night lighting requirement is zero for 50W LED and 3.6% for 100W LED.
Keywords :
LED lamps; PWM power convertors; battery chargers; lighting; photovoltaic power systems; power generation control; solar cells; LED lighting; battery charging control; charging capacity; feedback control system; full night lighting; near maximum power point operation; power 100 W; power 50 W; pulse width modulation technique; solar home system; stand alone solar photovoltaic power system; Batteries; Control systems; Feedback control; Junctions; Light emitting diodes; Lighting; Pulse width modulation;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2010 35th IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-5890-5
DOI :
10.1109/PVSC.2010.5614421
