在傳統太陽能陣列發電系統中使用串聯或並聯二極體的方式並不能有效改進發電效率降低的問題，即使在電力轉換器前加上最大功率點追蹤電路也無法改善此問題。本論文提出一種改善太陽能陣列發電系統中，因某單一模組部份遮蔭或特性較差時，而使得整體發電效率嚴重下降的解決方法，並維持輸出直流電壓的穩定。本文提出的方法是在每一片太陽能電池模組輸出加上一個高效率之返馳式串聯連接的昇壓轉換器，其線性的輸出、入特性再結合三點權位最大功率追蹤電路，將使得單片太陽能電池模組同時擁有定電壓輸出及最大功率追蹤雙重特性。電路結構簡單，體積也小，幾乎只要放在電池模組背後的接線盒內即可。電池模組依然可以任意的串、並聯連接，若是模組發生部份遮蔭現象，也只影響該模組，對其他模組的發電量毫無影響。甚至不同品牌的太陽能電池模組，只要輸出電壓相近皆可串、並聯使用，不影響整體發電效率。另外，本文利用串接型返馳式電壓轉換器類似自耦變壓器特性，設計一昇壓電路，用來解決蓄電池組並聯充電與放電的問題，並加快充電時間。 The electric power supplied by a photovoltaic power generation system depends on the solar radiation and temperature. Designing efficient PV systems heavily emphasizes to track the maximum power operating point. This work develops a novel three-point weight comparison method that avoids the oscillation problem of the perturbation and observation algorithm which is often employed to track the maximum power point. Furthermore, this study proposes the series connected boost unit integrated with the proposed maximum power point tracking algorithm to improve the efficiency of the solar system. Finally, this work implements a low cost control unit on a single chip based on the proposed method to adjust the output voltage of the solar cell array. Finally, experimental results confirm the performance of the proposed method.
