臺灣博碩士論文加值系統

本論文主旨為研製一台固態變壓器，架構採用高頻操作的主動雙橋式轉換器。傳統變壓器在電力系統中被廣泛使用，以執行許多功能，如電氣隔離、電壓轉換、雜訊隔離等等。但因傳統變壓器有體積較大、重量較重等問題，故需要新的技術來取代。而採用高頻操作的固態變壓器便是其中之一，透過提升操作頻率的方式，減小變壓器的尺寸與重量；另一方面，透過相移調變控制功率潮流的大小與方向。但因採用高頻操作的關係，在輸入輸出側均需使用二階低通濾波器來濾除高頻成分。因此，在設計時需要仔細考量，以免喪失減少整體變壓器體積重量的目的。
本論文實際完成一台輸入電壓為220 Vrms、輸出電壓為220 Vrms以及輸出功率2 kW，以交流-交流主動雙橋式轉換器為應用的固態變壓器原型，並以數位訊號處理器來實現數位控制，在不同的負載下效率均在92%以上。

In this thesis, a solid-state transformer is studied and implemented. The structure adopted is a high-frequency operated active-dual-bridge converter. Conventional transformers are widely applied in electric power systems for performing many functions, such as electric isolation, voltage level transformation, noise decoupling, etc. However, these conventional transformers have larger volume, heavy weight which are becoming unacceptable nowadays; therefore, newer technologies are highly expected. High-frequency operated solid-state transformers are one of solutions. By increasing the operating frequency, the volume and weight of the transformer can be reduced; on the other hand, phase-shift modulation can be used to regulate the power flow in either direction. However, the use of high-frequency operation induces unwanted high-frequency components, which claim for second-order low pass filters on both input and output sides to filter out these unwanted ingredients. Therefore, carefulness on design is required in order not to lose the objective of reducing weight and volume.
A prototype circuit based on ac-ac dual-active-bridge converter has been built and tested in lab successfully. The circuit is with rated of 220 Vrms input voltage, 220 Vrms output voltage and 2 kW output power. A digital-signal processor is used to realize the control of this circuit. The measured efficiency is higher than 92% within the overall range of load conditions.

摘　要 i
Abstract ii
致謝 iii
目　錄 iv
圖索引 vii
表索引 x
第一章 緒論 1
1.1 前言 1
1.2 研究動機與目的 3
1.3 論文內容架構 3
第二章 文獻回顧 4
2.1 傳統變壓器介紹 4
2.2 固態變壓器介紹 6
第三章 主動雙橋式轉換器電路分析 9
3.1 動作原理 10
3.2 電路動作分析 11
3.3 傳輸功率與相移角關係 18
第四章 系統研製 22
4.1 電路規格 22
4.2 電路設計 22
4.2.1 漏感設計 22
4.2.2 切換功率晶體 23
4.2.3 變壓器設計 23
4.2.4 濾波器設計 29
第五章 控制系統設計 31
5.1 數位訊號處理器介紹 31
5.1.1 TMS320F28035簡介 31
5.1.2 ePWM模組 32
5.2 韌體流程規劃 34
5.3 脈波寬度調變訊號 36
5.3.1 ePWM參數設計 37
5.3.2相移角參數設計 40
5.4 交流-交流 DAB控制方式 41
5.5 RL負載控制模擬 44
第六章 實驗結果分析 46
6.1實驗波形圖 46
6.1.1交流控制模式波形圖 47
6.1.2直流-直流主動雙橋式轉換器電路波形圖 48
6.1.3交流-交流主動雙橋式轉換器電路波形圖 50
6.1.4 輸出電壓之頻譜分析 56
6.2 實驗數據 57
第七章 結論與未來展望 58
7.1 結論 58
7.2 未來展望 58
參考文獻 60

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