Developing an Integrated Soft-Switching Bidirectional DC/DC Converter for Solar-Powered LED Street Lighting

Saeed Danyali (), Mohammadamin Shirkhani, Jafar Tavoosi, Ali Ghazi Razi, Mostafa M. Salah and Ahmed Shaker ()
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Saeed Danyali: Department of Electrical Engineering, Ilam University, Ilam 6931647574, Iran
Mohammadamin Shirkhani: Department of Electrical Engineering, Ilam University, Ilam 6931647574, Iran
Jafar Tavoosi: Department of Electrical Engineering, Ilam University, Ilam 6931647574, Iran
Ali Ghazi Razi: Department of Electrical Engineering, Ilam University, Ilam 6931647574, Iran
Mostafa M. Salah: Electrical Engineering Department, Future University in Egypt, Cairo 11835, Egypt
Ahmed Shaker: Engineering Physics and Mathematics Department, Faculty of Engineering, Ain Shams University, Cairo 11535, Egypt

Sustainability, 2023, vol. 15, issue 20, 1-23

Abstract: In the current era marked by the growing adoption of renewable energy sources, the use of photovoltaic-powered LED streetlights, known for their enhanced efficiency and extended lifespan, is on the rise. This lighting solution encompasses essential components such as a photovoltaic (PV) panel, an energy storage system, LED luminaires, and a controller responsible for supervising power distribution and system operations. This research introduces a novel approach involving a ZVS (zero-voltage switching) bidirectional boost converter to manage the interaction among the PV panel, LED lights, and battery storage within the system. To elevate system efficiency, a modified version of the conventional bidirectional boost converter is employed, incorporating an auxiliary circuit encompassing a capacitor, inductor, and switch. This configuration enables soft switching in both operational modes. During daytime, the converter operates in the buck mode, accumulating solar energy in the battery. Subsequently, at night, the battery discharges energy to power the LED lights through the converter’s boost operation. In this study, the PET (photo-electro-thermal) theory is harnessed, coupled with insights into heatsink characteristics and the application of a soft-switching bidirectional boost converter. This integrated approach ensures optimal driving of the LED lights at their ideal operating voltage, resulting in the generation of optimal luminous flux. The proposed LED lighting system is thoroughly examined, and theoretical outcomes are validated through simulations using the PSCAD/EMTDC version 4.2.1 software platform.

Keywords: optimal flux; buck–boost converter; soft switching; LED streetlights; PET theory; photovoltaic (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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