SIZING AND SIMULATING OF AN AUTONOMOUS PUBLIC LIGHTING SYSTEM

Abstract

According to the current energetic situation of the world, it arises with a strong intensity, the need of researching and using new alternative energy sources in order to be used as a complement of the actual power supply system, combined with the aware of decreasing environmental impacts. This paper presents the sizing and the simulation of an autonomous led lighting system, composed of supercapacitors as energy storage elements to be used as street lighting for pedestrians. This system can be devised into two different blocks. The first block consists in a photovoltaic panel; a Buck DC/DC converter; supercapacitors and a MPPT controller, which has the main purpose of managing the functioning of the led lighting, using the algorithms of constant voltage in order to find the MPPT point of the photovoltaic panel. Furthermore, the second block contains a Boost DC/DC converter; an assortment of high efficiency led lights and a PWM controller. In this context, the aim of this paper consist of presenting the feasibility of the use of the supercapacitor as an energy storage element and the presentation of a new public lighting system, in order to achieve a better use of power supplied by a solar panel using a second Buck DC/DC converter. The results have been obtained by the use of the Matlab software, which led to a conclusion that the system is efficient and it meets all the needs proposed before.