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標題: | 主動箝位電流饋入型雙主動橋式轉換器模組化研製 Design and Implementation of Modular Active-Clamped Current-Fed Dual Active Bridge Converters |
作者: | Nien-Ting Chung 鍾念廷 |
指導教授: | 陳耀銘(Yaow-Ming Chen) |
關鍵字: | 模組化轉換器,電流源型雙主動橋式轉換器,去中心式逆下垂控制,效率分析,雙向轉換器, Modular Converters,Current-Fed Dual Active Bridge Converter,Decentralized Inverse-Droop Control,Efficiency Analysis,Bidirectional Converter, |
出版年 : | 2022 |
學位: | 碩士 |
摘要: | 本論文的目標是研製模組化主動箝位電流饋入型雙主動橋式(Active Clamped Current-Fed Dual Active Bridge, AC-CFDAB)轉換器。首先根據使用二次側調變(Secondary-Side Modulation)控制方法的AC-CFDAB提出效率分析,然後根據推導出的效率數學模型分析出在不同負載下最適合操作的模組數,藉以提高電路整體效率。 電源轉換器的效率受電氣規格、元件特性與操作方式的影響很大。不同於現有已知文獻,本論文提出了考量死區(deadtime)時間與寄生元件影響之數學模型,以提升效率分析的準確度。另一方面,使用模組化串並聯式電路架構會遇到串聯電容電壓不平衡的問題。因此本論文使用改良型去中心式逆下垂控制(Decentralized Inverse-Droop Control),確保在雙向操作下串聯電容電壓都能保持平衡。 本論文所提出的效率數學模型採用商用電路模擬軟體進行驗證。並實作一套三組共2.7kW的AC-CFDAB轉換器進行實際量測,以驗證效率數學模型的準確度與控制方法的可行性。 The objective of this thesis is to design and implement modular active-clamped current-fed dual active bridge (AC-CFDAB) converters. Based on the secondary-side modulation method, the mathematical model of the AC-CFDAB’s power conversion efficiency is developed. According to the derived efficiency model, the number of operating modules under different demanded power can be determined to increase the efficiency of the overall system. It is well-known that the converter’s efficiency is highly affected by the specifications, component characteristics, and operation modes. Different from those published papers, the thesis includes the influence of switching deadtime and parasitic components for mathematical model development to improve the accuracy of the efficiency analysis. On the other hand, the proposed modular converters are connected in parallel at the current-fed side to reduce the current ripple and are connected in series at the voltage side to reduce the component’s voltage stress. Hower, the unbalanced voltages on the series-connected capacitors become a stability issue. In this thesis, an improved decentralized inverse-droop control (IDIC) is proposed to achieve voltage balancing among series-connected capacitors for bidirectional power operations. The proposed mathematical efficiency model is verified by using commercializied circuit simulation software. A 2.7kW AC-CFDAB consists of 3 modules is built and tested to verify the accuracy of the mathematical efficiency model and the performance of the proposed IDIC. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/86557 |
DOI: | 10.6342/NTU202202164 |
全文授權: | 同意授權(全球公開) |
電子全文公開日期: | 2024-09-01 |
顯示於系所單位: | 電機工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
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U0001-0808202220174700.pdf | 12.24 MB | Adobe PDF | 檢視/開啟 |
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