SOLAR POWERED STREET LIGHTING SYSTEM EFFICIENCY IMPROVEMENT WITH SINGLE-ENDED PRIMARY INDUCTANCE CONVERTER BY REDUCING RIPPLE CONTENTS

Saad Mustafa; Khalid Iqbal

Saad Mustafa Electrical Engineering Department, University of Engineering & Technology Taxila
Khalid Iqbal Electrical Engineering Department, University of Engineering & Technology Taxila

Keywords: DC-DC Converter, Renewable Energy, LT1371HV I.C, SEPIC Converter

Abstract

Buck converter is being used in the central system as well as in decentralized PV streetlights. It can step-down the input voltage. The buck converter requires a single capacitor and an inductor. But the first problem in this converter is that due to switching, it suffers from a high amount of current ripple contents approximately 1-ampere inside the buck converter. This 1 ampere current ripple contents causes large amount of heat in electrical components, this can be equipment failure. The ripple current is power loss due to which the efficiency reduced to 87%. In this study, the DC-DC Single Ended Primary Inductance Converter (SEPIC) with Linear Technology LT1371HV I.C has simulated and analyzed that the current ripple contents are reduced to 224mA due to which efficiency of the proposed PV street lighting system increased to 97%.