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1、Design and Development of Energy-Free SolarStreet LED Light SystemMokhtar Ali1, Mohamed Orabi1, Emad Abdelkarim1, Jaber A. Abu Qahouq 2 and Abdelali El Aroudi31APEARC, South Valley University, Aswan 81542, Egypt2Electrical and Computer Eng. Dept., The University of Alabama, Tuscaloosa, Alabama 35487
2、, USA3Universitat Rovira i Virgili, Tarragona, Spainorabiieee.orgAbstract- Today, all count words are about how to enhancethe electrical grid reliability during the peak instant. The directsolution for the grid is to cut off some loads to keep its stability.One of these loads is the street lighting
3、especially during thesummer period. This paper proposes an energy-free system forstreet lighting as there is no power demand from the grid. Astandalone solar street LED light system is proposed. Theproposed system consists of a PV panel, storage system, LEDlamp, power conditioning system (PCS) and t
4、he controller whichcan manage the power direction and system operation. UsingLED in lighting applications has many advantages compared toother lamp. It is very efficient (very high efficiency lightingsource) lamps and cost effective (the life time is very longcompare to other lamps). In additions to
5、, it needs low dc voltagesource to be operated. The storage system will be charged duringthe day time using the available sunlight. On the other hand,during the night time the controller will give a signal to thesystem to connect the LED lamp to be ready for use. Since theLED needs a low dc voltage
6、to be operated, a simple dc-dcconverter will be enough for this system resulting in decreasingthe cost of the overall system. Moreover, a low costmicrocontroller is proposed to handle the operation of the wholesystem. Applying this idea in the Egyptian streets enables thereduction of more than 50 %
7、of the total required energy by HIDlamps that enable the use for small PV system. By this proposedsystem, streets can be illuminated with lower power lamps, nooperating costs, no CO2 emissions, grid energy-free andenvironmentally friendly. Moreover, the proposed solution cansolve the Egyptian peak p
8、oint crisis of load demand.Index Terms- energy-free system, LED, microcontroller, PVpanel, street lighting.I. INTRODUCTIONToday world is facing an energy shortage due to theincrease of the average consumption of energy per capita. Thisled to continuous decrease of the world storage of oil andnatural
9、 gaz. Also pollution problems have been highlighted asthe source of stresses on the ground life. Therefore,Renewable Energy Technologies have drawn tremendousinterest worldwide to find solutions for world energy crisis.Recently PV systems have found fairly wide applications fromlarge scale PV plants
10、 with cumulative power reachesapproximately a few tenths of GWp were connected toreaching the grid of a small scale PV reaching approximately afew tenths of Watts in applications such as Camera, watches,Mobiles, etc. One of these PV applications is the standalonestreet lighting system using the most
11、 efficient and the costeffective Light Emitting Diode (LED) lamps. This systemconsists of PV panel, high quality battery, LED lamp, dc-dcconverter, and a controller.This system is not only an environmentally friendly option(requiring no power input plus free of pollution), but can alsobe located any
12、where regardless of local grid availability. Thepower source is a solar power which is recognized as being anenvironmentally clean form an energy production point ofview. PV arrays utilize the sun radiation to produce electricity.These modules do not require fuel to operate.On the other hand, most c
13、urrent street lighting uses highintensity discharge lamps. Recently, searching for new streetlighting modules has gained a lot of attention to reduce theamount of energy consumed by this type of lamp and also toreduce the amount of CO2 emissions. LEDs with their currentperformances have proved thems
14、elves to be the most suitablesolution for LED street lighting, 1 and 2. The LED lampoffers many advantages such as: extremely long life, 100,000hours, extreme robustness as there are no glass components orfilaments, no external reflector, a modular construction, noemissions like HID lamps and most i
15、mportantly their highefficiency. LEDs are good light source; their efficiency is 160Lm/W. So, using this type of lamps enables the reduction ofmore than 50 % of the total energy used by HID lamps; that byits order reduces the required PV arrays. Therefore, applyingthe proposed system, streets can be illuminated with lowerpower lamps, no operating costs, no CO2 emissions andenvironmentally friendly 3 - 4.Due to the importance of the issue, there are manycompanies around the world that are now involved indeveloping, building, and producing these products of streetlight. Also t
