Title :
A high efficiency autonomous street lighting system based on solar energy and LEDs
Author :
Costa, Marco A D ; Costa, Guilherme H. ; Santos, Anderson S dos ; Schuch, Luciano ; Pinheiro, José R.
Author_Institution :
Centro de Cienc. Exatas e Tecnol. - CCET, Univ. de Caxias do Sul - UCS, Getulio Vargas, Brazil
fDate :
Sept. 27 2009-Oct. 1 2009
Abstract :
This work presents an autonomous street lighting system based on solar energy as primary source, batteries as secondary source, and lighting emitting diodes (LEDs) as lighting source. This system is being presented as an alternative for remote localities, like roads and crossroads. Besides, it presents high efficiency, because all power stages are implemented in DC current. The design of LEDs fixture, in order to replace a 70 W high pressure sodium (HPS) lamp, is performed. This design takes into account the human eye response in scotopic conditions. LEDs driver and battery charger experimental results are presented. The battery charger presents three control modes: maximum power point tracker (MPPT) mode; constant current mode; and constant voltage mode. The control mode depends on the battery state (charged/discharged), and solar irradiance level.
Keywords :
LED lamps; battery chargers; street lighting; LED; autonomous street lighting system; battery charger; constant current mode; constant voltage mode; high pressure sodium lamp; lighting emitting diodes; lighting source; maximum power point tracker mode; solar energy; solar irradiance level; Batteries; Control systems; Costs; Inverters; LED lamps; Light emitting diodes; Lighting control; Power generation; Roads; Solar energy; Batteries; Fotopic Vision; LEDs; Scotopic Vision; Solar Energy; Street lighting;
Conference_Titel :
Power Electronics Conference, 2009. COBEP '09. Brazilian
Conference_Location :
Bonito-Mato Grosso do Sul
Print_ISBN :
978-1-4244-3369-8
Electronic_ISBN :
2175-8603
DOI :
10.1109/COBEP.2009.5347688
