本文太陽能照明系統的研究，以探討照明系統的電能管理為核心，系統以高壓鈉燈及冷陰極螢光燈作為照明負載，分別就照明管理系統的設計及應用、點燈電路的設計、分離型線路的配置、系統整合及冷陰極螢光燈點燈電路之控制積體電路的設計進行探討。
太陽能照明系統的電能管理分為發電系統及照明系統兩部分。在發電系統部分，採用最大功率追蹤控制技術，並搭配零電壓切換式直流轉換器作為充電電路，以提升發電及充電的效率。在照明系統部分，本文根據人類夜間的作息習慣，提出夜間區段調光曲線，作為照明管理系統設計的準則。為了使蓄電池的能量在夜間有效地運用，系統可依季節的不同，設定夜間點燈的時間長度，並藉由偵測蓄電池電壓的大小，判斷蓄電池的儲存容量，作為照明負載選擇夜間區段調光曲線的依據，以達到夜間持續照明及調光節能之目的。
高壓鈉燈點燈電路的設計，採用推挽式串聯諧振並聯負載電子安定器，直接將蓄電池升壓後點燈。高壓鈉燈的調光則藉由改變變流器的輸入電壓。冷陰極螢光燈點燈電路的設計，由壓電型諧振式變流器直接將蓄電池升壓後點燈，並採用脈衝模式作為調光的方法，而點燈電路的參數設計則採用傳輸參數的模型與虛功率補償的方法。冷陰極螢光燈點燈電路之控制積體電路設計有升壓式穩壓器與變流器兩種控制迴路，控制迴路設計有穩壓、柔性啟動、數位調光、頻率微調及燈管異常偵測等功能。
由實驗及模擬結果顯示，高壓鈉燈由100 W變化到27 W時，燈管電流峰值因數均低於1.4；冷陰極螢光燈由4 W變化到2.3 W，效率維持90 % 以上。本文所設計的太陽能照明管理系統，能達到持續照明、節能、低燈管電流峰值因數的要求，符合綠色照明之實用潮流。

In developing the proposed solar-powered lighting system using high-pressure sodium lamps and cold-cathode fluorescent lamps (CCFLs) as the load, we first focus on an electric energy management aimed at energy conservation and then separately design the lamp-ignition circuit, the separate-type circuit layout, the CCFL lamp-ignition control integrated circuit and, finally, integrate them together.
The electric energy management comprises an electricity generation system and a lighting system. In the electricity generation system, we adopt the maximum-power point tracking (MPPT) control technique and match it with a zero-voltage switching DC-DC converter served as a charging circuit to increase the efficiencies in wattage generation and charging. In the lighting system, we propose, according to ordinary evening activity habits, a night-time time-zone-wise light-adjustment curve as the guideline for the design of our lighting management system. To enable the efficient usage of the batteries’ energy capacity, the proposed system may set, according to the season difference, the night-time lighting time length and, according to the measured charging voltage magnitude of battery, determine the storage capacity of the batteries to offer a criterion for selecting a suitable night-time time-zone-wise light-adjustment curve for the lighting loads to reach the goals of energy conservation and continuous lighting during the night-time.
A push-pull type series-connected resonant circuit is connected in parallel with electronic ballast as the load to directly raise the battery voltage to ignite the high-pressure sodium lamp. The high-pressure sodium lamp is dimmed by varying the input voltage of the inverter. A piezoelectric resonant-type inverter is used to raise the battery voltage to ignite the CCFL; the burst mode is adopted as the dimming method for the CCFL. A transmission-parameter model and a reactive power compensation method are employed to determine the parameters of the lamp-ignition circuit. An integrated circuit for controlling the ignition of the CCFL, which includes two control loops for a boost regulator and an inverter, is developed in this study; the control loops offer a few functions such as voltage stabilization, soft start, digital dimming, frequency fine tuning, lamp abnormality detection, and so forth.
The experimental and simulation results indicate that the crest factor of the lamp current is all below 1.4 when the output power of the high-pressure sodium lamp varies from 100 W to 27 W. The efficiency of the CCFL remains above 90% when it is dimmed from 4 W to 2.3 W. The solar-powered system developed in this study possesses a few advantages, including continuous lighting ability, energy conservation and a low lamp-current crest factor, which all conform to the general intention of green lighting.

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