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研究生:汪聖惠
研究生(外文):Wang, Sheng Hui
論文名稱:隔離型雙向直流/直流轉換器研製
論文名稱(外文):Design and Implementation of Isolated Bi-directional DC/DC Converter
指導教授:吳財福
指導教授(外文):Wu, Tsai Fu
學位類別:碩士
校院名稱:國立清華大學
系所名稱:電機工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2016
畢業學年度:104
語文別:中文
論文頁數:75
中文關鍵詞:分切合整數位控制寬電感值變化直流/直流轉換器
外文關鍵詞:D-Σ digital controlwide inductance variationdc/dc converters
相關次數:
  • 被引用被引用:2
  • 點閱點閱:372
  • 評分評分:
  • 下載下載:48
  • 收藏至我的研究室書目清單書目收藏:0
本研究室提出一套適用於家庭的混合能源微電網控制系統,包含雙向換流器、雙向直流/直流轉換器以及太陽能最大功率追蹤轉換器,而本研究將著重於雙向直流/直流轉換器之研製。在此轉換器中,前級諧振轉換器提供高壓側與低壓側間的電氣隔離,並利用諧振特性使開關達到軟切換;後級雙向降壓型轉換器可提高降壓比的自由度。在控制方面採用分切合整數位控制法則(D-Σ digital control),此控制法則允許寬廣感值變化,電感電流能精準追蹤電流命令,達到定電流充/放電與穩壓功能。
本論文主要貢獻為:將隔離型雙向直流/直流轉換器應用於混合能源微電網控制系統中,並於此轉換器中採用分切合整數位控制,達到系統所需之定電流充/放電與穩壓功能。最後本研究實現一部額定功率2 kW,輸入電壓380 ± 20 V,輸出電壓48 ± 6 V之隔離型雙向直流/直流轉換器,此轉換器於滿載2 kW時之實測效率可達到93.9%。將其搭配雙向換流器以及太陽能最大功率追蹤轉換器整合測試,以驗證應用於混合能源微電網控制系統之可行性。

A hybrid energy control system of a microgrid was proposed in our lab. It includes a bi-directional inverter, bi-directional dc/dc converter and maximum power point tracking converter connected through a common DC-bus. The main focus of this study is on design and implementation of an isolated bi-directional dc/dc converter, which consists of two converter stages connected in cascade. The first stage is a bi-directional full-bridge LLC resonant converter which can achieve ZVS with the resonance characteristics of the LLC, and its transformer can provide galvanic isolation. The second stage is a bi-directional buck converter which can improve the degree of freedom in tuning step-down and step-up ratio. With the division-summation (D-Σ) digital control, the second stage converter is allowed to have wide inductance variation due to the magnetic permeability of the core varying with inductor current. It can track current reference precisely and achieve constant current charging/discharging of the battery.
The major contribution of this paper is that this research adopts an isolated bi-directional dc/dc converter in a hybrid energy control system. It applies the D-Σ digital control to the converter to achieve constant current charging/discharging and DC-bus voltage regulation. A 2 kW isolated bi-directional dc/dc converter prototype with input voltage 380 ± 20 V and output voltage 48 ± 6 V has been implemented. The efficiency can reach 93.9% under full load condition. The bi-directional dc/dc converter can be combined with a bi-directional inverter and a maximum power point tracker to verify the feasibility of the hybrid energy control system.


摘 要 I
Abstract II
誌 謝 III
目 錄 IV
圖目錄 VII
表目錄 X
第一章 緒論 1
1.1 研究背景與動機 1
1.2 轉換器架構回顧 3
1.2.1 全橋式雙向相位移型轉換器 3
1.2.2 全橋式非諧振不連續型轉換器 4
1.2.3 架接型全橋轉換器 4
1.2.4 全橋式LLC諧振轉換器 5
1.3 控制方法回顧 5
1.3.1 單電壓控制 6
1.3.2 尖峰電流模式控制 6
1.3.3 平均電流模式控制 7
1.3.4 分切合整數位控制(D-Σ Digital Control) 8
1.4 論文架構 8
第二章 直流/直流轉換器與控制 10
2.1 隔離型雙向全橋LLC諧振轉換器 10
2.1.1 電路架構 10
2.1.2 動作原理 12
2.1.2 參數設計 15
2.2 雙向降壓型轉換器 16
2.2.1 電路架構 16
2.2.2 動作原理 17
2.2.3 分切合整數位控制 19
第三章 混合能源微電網控制系統 20
3.1 系統整合 20
3.1.1市電端啟動 21
3.1.2電池端啟動 22
3.2 定電流模式 23
3.3 穩壓模式 23
3.3.1 穩壓機制介紹 24
3.3.2 電流命令推導 24
第四章 控制韌體規劃 27
4.1 微處理器介紹 27
4.2 程式流程 30
4.2.1 主程式流程 30
4.2.2 保護副程式 31
4.2.3 A/D中斷副程式 32
第五章 轉換器周邊電路 39
5.1 輔助電源 39
5.2 電壓保護電路 41
5.3 電壓偵測與保護電路 41
5.4 電流偵測與保護電路 42
5.5 硬體保護電路 44
5.6 開關隔離驅動電路 45
第六章 轉換器製作與實務考量 46
6.1 電氣規格 46
6.2 實務考量 47
6.2.1 輸出電感感值變化 48
6.2.2 諧振電感鐵芯選擇 49
6.2.3 穩壓校正 51
6.3 實測結果 54
6.3.1 隔離型雙向直流/直流轉換器實測波形 54
6.3.2 混合能源微電網控制系統整合波形 63
6.4 電路效率分析 67
6.5 實體電路 71
第七章 結論與未來研究方向 72
7.1結論 72
7.2未來研究方向 73
參考文獻 74


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