Autonomous street lighting system based on solar energy and LEDs

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 70W 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. The battery charger input impedance is analyzed in order to ensure that the MPPT is obtained for any solar irradiance and panel temperature.

[1]  A. Forbes,et al.  A PRACTICAL MODEL FOR MESOPIC PHOTOMETRY , 2006 .

[2]  Syed Islam,et al.  A battery management system for stand alone photovoltaic energy systems , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[3]  Francisco A. S. Neves,et al.  Comparative Study Of Maximum Power Point Tracking Techniques For Photovoltaic Systems , 2007 .

[4]  Tore Undeland,et al.  Power Electronics: Converters, Applications and Design , 1989 .

[5]  Ian Lewin.  Lumen Effectiveness Multipliers for Outdoor Lighting Design , 2001 .

[6]  A. Barrado,et al.  The control strategies for photovoltaic regulators applied to stand-alone systems , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[7]  M. Shur,et al.  Introduction to Solid-State Lighting , 2002 .

[8]  Alexandre Campos,et al.  Warm-Up and Steady-State Control of High-Pressure Sodium Lamps Applied to Public Lighting Systems , 2008, 2008 IEEE Industry Applications Society Annual Meeting.

[9]  Jan T. Bialasiewicz,et al.  Power-Electronic Systems for the Grid Integration of Renewable Energy Sources: A Survey , 2006, IEEE Transactions on Industrial Electronics.

[10]  Antonio Luque,et al.  COST REDUCING POTENTIAL OF PHOTOVOLTAIC CONCENTRATION , 1995 .

[11]  Yi-Hwa Liu,et al.  Design and implementation of a maximum power point tracking battery charging system for photovoltaic applications , 2005, 2005 IEEE Russia Power Tech.

[12]  John D. Bullough,et al.  Evaluating light source efficacy under mesopic conditions using reaction times , 1997 .