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Design and Implementation of a Photovoltaic High-Intensity-Discharge Street Lighting System

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4 Author(s)
Huang-Jen Chiu ; Department of Electronic Engineering , National Taiwan University of Science and Technology, Taipei, Taiwan ; Yu-Kang Lo ; Chun-Jen Yao ; Shih-Jen Cheng

This paper presents a photovoltaic (PV) high-intensity-discharge (HID) street lighting system. A single-ended primary inductance converter (SEPIC) is studied for maximum power point tracking (MPPT) and battery charging. High conversion efficiency and high MPPT accuracy can be achieved under different atmospheric conditions. A pulse-current-charging scheme with an adaptive rest-period is also applied to avoid battery overcharging. An electronic ballast circuit is also designed to release the solar energy stored in battery for powering HID lamps. The studied PV HID street lighting system is connected to the ac-line utility with a SEPIC power factor correction converter. High input power factor can be achieved when energy is drawn from the ac-line utility to drive the HID lamp and to prevent the battery from over-discharging. The proposed PV HID street lighting system has the advantages of high power density, simple circuit, and long lifetime. The operating principle and design considerations were analyzed and discussed in detail. A laboratory prototype was implemented and tested. The experimental results were shown to verify the feasibility of the proposed scheme.

Published in:

IEEE Transactions on Power Electronics  (Volume:26 ,  Issue: 12 )