臺灣博碩士論文加值系統

本研究提出具寬廣電感變化與負載阻抗估測之三相四線式換流器的研製，此三相四線式換流器可滿足併網型與獨立型之再生能源交流供電系統。於獨立型系統中，由於有中性臂的存在，換流器可穩定三相不平衡或非線性負載輸出之弦波電壓。藉由負載阻抗之估測，控制器可以準確地追蹤交流弦波電壓準位，且允許寬廣的電感值變化，降低鐵心體積與成本。本控制法以兩相調變法為基礎，結合了無拍差控制(Dead-beat Control)和負載阻抗估測，負載阻抗的估測更導入了重複性控制(Repetitive Control)的概念來減少估測的誤差，以確保系統的穩定性。最後，本研究將控制法以 Matlab 模擬並實作一部10 kVA三相四線式換流器來驗證所提方法的可行性。

This thesis presents design and implementation of a three-phase four-wire inverter with load impedance estimation. The inverter can fulfill both grid-connected and stand-alone mode operations. In the stand-alone mode, the inverter with a neutral leg can generate sinusoidal output voltage for unbalanced load and nonlinear load. With the load impedance estimation, the controller can track the sinusoidal reference voltage accurately, and the inverter is allowed to have a wide inductance variation, reducing core loss and size significantly. The control law is derived based on the two-phase modulation (TPM) scheme with a dead-beat control and on-line load impedance estimation, in which the repetitive control concept is adopted to reduce the estimation tolerance. Computer simulation and experimental results from a 10 kVA three-phase four-wire inverter have been presented to confirm the feasibility of the inverter.

目錄
中文摘要……………………………………………………………………………….i
英文摘要………………………………………………………………………………ii
目錄…...………………………………………………………………………………iii
圖目錄……………………………………………………………………………..…..v
表目錄...……………………………………………………………………………..viii


第一章 緒論 1
1-1 研究背景與動機 1
1-2 文獻回顧 2
1-2-1 不斷電系統簡介 2
1-2-2 三相換流器簡介 4
1-2-3 電壓型控制法簡介 7
1-3 負載阻抗估測控制法 8
1-4 論文大綱 8
第二章 三相四線式換流器架構與動作原理 10
2-1 換流器系統架構 10
2-2 換流器動作原理 11
2-3 負載阻抗估測控制法推導 30
第三章 系統軟體規劃 35
3-1 系統軟體架構 35
3-2 控制流程規劃 36
3-2-1 微控制器RX62T簡介 36
3-2-2 控制流程 39
第四章 系統周邊電路設計 44
4-1 輔助電源 44
4-2 微控制器電壓保護電路 46
4-3 交流電電壓偵測電路 47
4-4 直流鏈電壓偵測電路 49
4-5 電感電流感測電路 49
4-6 開關隔離驅動電路 50
第五章 電路製作及其模擬與量測驗證 52
5-1 電氣規格 52
5-2 三相四線式換流器模擬系統建模 53
5-3 實務考量 56
5-3-1 電感值變化考量 56
5-3-2 開關死區補償 57
5-4 負載阻抗估測控制法模擬及實驗波形 60
5-4-1 電阻性負載模擬及實測波形 61
5-4-2 電感性負載模擬及實測波形 66
5-4-3 電容性負載模擬及實測波形 71
5-4-4 不平衡負載模擬及實測波形 75
5-4-5 整流性負載模擬及實測波形 79
第六章 結論與未來研究方向 82
6-1 結論 82
6-2 未來研究方向 83
參考文獻 85

參考文獻
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