Autonomous urban lighting

In order to limit installation and operational costs, increasingly often we are seeing street furniture with autonomous power supplies, such as parking meters or streetlamps. This limits the need for trench-digging, sidewalk-resurfacing and electricity meter rental. 

F ure 3.26. Charging power and SOC at end of charge for the lithium-ion battery in the Renault Twizy (source CEA) 

From the point of view of consumption, the streetlamp is programmed to deliver full lighting power for 1 hour 30 minutes at the beginning and end of the hours of darkness. In addition, it illuminates at full power for 45 seconds every time the passage of a user is detected. 

12 The authors would like to thank Jean-Pierre Belliard, the founder and CEO of the company NOVEA Energies, and Jeremie Jousse, a doctoral candidate at NOVEA/CEA, for all the data and explanations they kindly supplied. 

13 The LED also has the longest lifetime of all possible light sources, which minimizes the need for the costly operation of relamping (changing of the lamp). 

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A real-world example of the current and voltage for an autonomous urban lighting application is given in section 3.1.6. 

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