研究生: |
吳志穎 CHIH-YING WU |
---|---|
論文名稱: |
具輸入並聯/輸出串並聯隔離型直流/直流轉換器之風力發電系統 An Input-Parallel and Output-Series-Parallel Isolated DC/DC Converter With Maximum Power Point Tracking for Wind Turbine System |
指導教授: |
楊宗銘
Chung-Ming Young |
口試委員: |
劉益華
Yi-Hua Liu 呂錦山 Ching-Shan Leu |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電機工程系 Department of Electrical Engineering |
論文出版年: | 2014 |
畢業學年度: | 102 |
語文別: | 中文 |
論文頁數: | 123 |
中文關鍵詞: | 隔離型直流/直流轉換器 、串並聯輸出 、並聯輸入 、最大功率追蹤 、風力發電機 |
外文關鍵詞: | wind turbine, maximum power point tracking, parallel input, series-parallel output, isolated DC/DC converter |
相關次數: | 點閱:457 下載:29 |
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本論文主旨在設計與製作新的直流/直流轉換器系統,系統以三台相移式全橋轉換器與串並聯電路所構成。三組的相移式全橋轉換器輸入側以並聯連接,輸出側則接至串並聯切換電路做串聯或並聯連接,使得三組相移式全橋轉換器的輸出有串聯與並聯九種不同輸出模式,並透過風力發電機所輸出的電壓值和功率來判斷模式。在較低的切入電壓時,串聯狀態使轉換器分壓輸出達成高輸出電壓增益,當風力發電機達到各模式可相對應之輸入功率時,再透過三台額定功率不同之相移式全橋轉換器輸出端採用並聯連接分擔輸出電流切換模式,配合擾動觀察法的最大功率點追蹤策略可使風力發電系統在變化的環境之下有最佳功率輸出,並且在整個操作範圍內得到更高的效率,本論文建立一5kW系統進行評估以及測試,並透過模擬與實驗結果來驗證提出之架構的可行性。
The subject of this thesis is to design and implement a wind turbine power generation system. The proposed structure consists of three phase-shift H-bridge converters and series parallel switching circuit. The three input sides of the H-bridge converters are paralleled directly, while the output sides can be connected in parallel and/or series through a series parallel switching circuit, which makes the three H-bridge converters output nine different connection configurations determined by the value of the input voltage and power which are generated and rectified from a wind turbine generator. The series status makes the converters to obtain high voltage gain with lower cut-in voltage. When rated power of the wind turbine is reached, the parallel status enables the H-bridge converters to share the load current. Also by cooperating with the well-known load-disturbance method for maximum power point tracking strategy. The proposed converter can obtain higher efficiency of the converter system over the whole operation range. Finally, this thesis established a 5kW prototype with using the digital signal processor (DSP TMS320F28069) as the digital controller. Both simulation and experimental results demonstrate the validity of the proposed converter.
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