可調光型之太陽能高壓鈉燈照明系統的設計與研製

Design and Implementation of a Dimming-type Solar-powered Lighting System Using a High-pressure Sodium Lamp

楊瑞錶(Jui-Piao Yang) ； 林時沂(Shyr-Yi Lin)

《中華技術學院學報》 34期 (2006/06) Pp. 105-123

https://doi.org/10.7095/JCIT.200606.0105

摘要

本文旨在設計及研製一個太陽能高壓鈉燈照明系統。系統結合太陽能板及蓄電池，經由功率轉換器，在白天時刻將太陽能儲存於蓄電池，並於夜間時刻由蓄電池提供能量給高壓鈉燈使用。系統以零電壓切換式直流轉換器作為蓄電池之充電電路，可減少開關切換損失，提高轉換效率，並以擾動與觀察之最大功率追蹤控制方法，作為太陽能板之功率控制。夜間時刻，蓄電池經由推挽式直流轉換器放電升壓作為串並聯諧振式變流器之輸入電壓，並藉由調整變流器的輸入電壓，以達到調光之功能。本文以Pspice模擬軟體完成零電壓切換式直流轉換器之電路模擬，並以數位信號處理器作為控制器的核心，以減少硬體元件，加速電路設計時程。由實驗結果顯示，本文所提的太陽能照明系統具有架構簡單與控制容易之優點，適合裝設於日照強度大，且市電困難到達之場所。

關鍵字

零電壓切換式直流轉換器 ； 最大功率追蹤 ； 推挽式直流轉換器 ； 數位信號處理器

並列摘要

This paper presents the design and implementation of a solar energy powered high-pressure sodium lamp light-dimming system. The system is constructed with solar cells, battery chargers, and a power converter as well as batteries. In daytime the batteries are charged by solar energy, and then release the energy for high-pressure sodium lamps at night. The proposed system uses a zero-voltage-switching (ZVS) DC/DC converter in the batteries' charge circuit to reduce the switching loss for a higher charging efficiency. Said system also adopts the maximum power point tracking (MPPT) technique to maximize the solar panels' photovoltaic conversion capability. When dark, the batteries in the proposed system will discharge, with a raised voltage, through a push-pull DC/DC converter; said voltage, as the input voltage of the series-parallel resonant inverter, will be regulated to dim the lamp. In this paper, zero voltage switching DC/DC converter is simulated by Pspice software. Then, the digital signal processor is used to implement the system, to reduce the number of circuit components and speed up the circuit design stage. The result of the experiment shows that the proposed lighting system has the advantages of easy control and simple structure. The lighting system is particularly suitable when installed at those areas where there is powerful sunshine and without power utility service.

並列關鍵字

zero voltage switching ZVS DC/DC converter ； maximum power point tracking MPPT ； push-pull DC/DC converter ； digital signal processor