Design and Implementation of a Photovoltaic High-Intensity-Discharge Street Lighting System
| Autor: | Chun-jen Yao, 姚竣仁 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 The photovoltaic (PV) street lighting systems have been used in many developing countries. They are highly economical when used in newly-built urban road sections. This dissertation presents a grid-tied PV high-intensity-discharge (HID) street lighting system. During daytime, the battery is charged by a PV panel. With the proposed Single-ended Primary Inductance Converter (SEPIC) PV charger, high maximum power point tracking (MPPT) accuracy and high efficiency battery charging can be achieved under a wide range of PV panel voltage variation. At night, the solar energy stored in the battery is released to drive the street lights by an electronic ballast circuit. A coupled inductor SEPIC power factor correction (PFC) converter is also used to draw energy from the AC-line utility to prevent the battery from over-discharging. High input power factor can be achieved at the AC-line utility side. Large input filter in a conventional transition mode (TM) PFC circuit is not needed for the studied PFC circuit using a TM PFC control IC L6561. The proposed PV HID street lighting system has the advantages of high power density, simple circuit, and long lifetime. The operating principles and design considerations for the proposed lighting system are described and analyzed in details. Experimental results and electromagnetic interference (EMI) designsfor a laboratory prototype are shown to verify the feasibility of the proposed method. Keywords：Photovoltaic High-Intensity-Discharge Street Lighting System, Single-Ended Primary Inductance Converter, Maximum Power Point Tracking, Electronic Ballast, Power Factor Correction, Electromagnetic Interference |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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