臺灣博碩士論文加值系統

本文旨在分析及製作適用於市電併聯之單相及三相直流-交流功率轉換器。在單相及三相直流-交流功率轉換器控制需市電角位置估測，採用數位鎖相迴路控制技術，並配合同步旋轉座標直-交軸電流閉迴路控制策略，以降低電感電流總諧波失真及提高功率因數使接近1.0。獨立運轉方面，單相獨立運轉採用交流電壓調節及前饋補償以提高電壓響應及減少穩態誤差；而在三相獨立運轉則採用電壓控制策略，控制輸出電壓來追隨命令電壓，以得具有三相平衡之電壓源輸出。在系統整合運轉方面，加入風力發電機平台並配合孤島偵測判斷市電斷掉後，讓系統由市電併聯模式轉切獨立運轉模式，使系統持續運轉提供交流負載所需功率，增加系統的可靠度。
　　本文已建立單相及三相直流-交流功率轉換器之整體系統數學模式，並以Matlab / Simulink套裝應用軟體模擬，驗證系統控制器之可行性。實體製作方面採用高性能之數位信號處理器TMS320F28335為整體系統之控制核心，其電壓及電流閉迴路控制策略皆由軟體程式完成，以減少硬體電路，提升系統運轉可靠度。本文已完成1kW之整體系統測試，市電側的單相或三相交流電壓皆為110V，60Hz，市電併聯實測電流總諧波失真率低於5%，整體效率均在90%以上。

This thesis is concerned with the analysis and implementation of single-phase and three-phase dc-ac power converters for grid-connection. The utility angle is used to calculate the digital phase-locked loop in the single-phase and three-phase dc-ac power converters. The controllers, which use the d-q current control modes, are performed under stationary frame, thereby yielding current and power stably to utility. In the stand-alone system, the single-phase ac voltage regulator and voltage feed-forward compensation are introduced to improve response and reduce the steady-state error. Whereas three-phase stand-alone system uses the voltage control strategy to control the output voltage to follow the balanced command voltage. The overall system for performance evaluation includes wind generator and islanding detection. When utility power fails, the system switches to stand-alone mode and continues to supply power to ac load reliably.
In this thesis, the mathematical models of single-phase and three-phase dc-ac power converter systems are built and simulated by Matlab/Simulink. Then, a high-performance digital signal processor, TMS320F28335, is used to control the system with the voltage and current feedbacks. The control of overall system is conducted by software to reduce circuit component and improve system reliability. A prototype of 1kW power conversion system is developed. Under single-phase and three-phase grid-connected operations, the output voltage is 110V, 60Hz. Besides, the experimental data show that the current total harmonic distortion measured is less than 5% with efficiency above 90%.

中文摘要 I
英文摘要 II
誌　　謝 III
目　　錄 IV
符號索引 VI
圖表索引 X
第一章　緒論 1
1.1　研究動機及目的 1
1.2　文獻探討 2
1.3　本文規格及特色 4
1.4　本文大綱 4
第二章　單相直流-交流功率轉換器控制 7
2.1　前言 7
2.2　單相直流-交流功率轉換器之數學模式 8
2.3　一階低通及全通數位濾波器 9
2.4　單相市電側之電壓角位置數位鎖相迴路控制 12
2.5　單相市電併聯之控制策略 14
2.6　單相電壓模式控制策略 17
2.7　結語 18
第三章　三相直流-交流功率轉換器控制 19
3.1　前言 19
3.2　三相直流-交流功率轉換器之數學模式 19
3.3　三相市電側電壓角位置之數位鎖相迴路控制 21
3.4　三相市電併聯之控制策略 23
3.5 三相電壓模式控制策略 25
3.6 結語 26
第四章　孤島偵測 27
4.1　前言 27
4.2　孤島運轉偵測方法與偵測不感測地帶 28
4.3 孤島偵測規範與方法 28
4.3.1 孤島偵測程式流程規劃 29
4.4　結語 32
第五章　實體製作與實測 33
5.1　前言 33
5.2　數位信號處理器之介面電路 33
5.3　DSP介面電路規劃 34
5.4　軟體規劃 36
5.4.1 單相直流-交流功率轉換器主程式流程 36
5.4.2 單相市電電壓角位置之數位鎖相迴路程式流程 38
5.4.3 單相電壓模式之獨立運轉程式流程 42
5.4.4 三相直流-交流功率轉換器主程式流程 44
5.4.5 三相市電電壓角位置之數位鎖相迴路程式流程 46
5.4.6 三相電壓模式之獨立運轉程式流程 50
5.5 計算機的模擬 52
5.6 實測結果 53
5.7 結語 55
第六章　結論與建議 75
6.1　結論 75
6.2　建議 76
參考文獻 77
附錄 A 單相直流-交流功率轉換器模擬程式 81
附錄 B 三相直流-交流功率轉換器模擬程式 84
附錄 C 比例共振控制器設計 87
附錄 D IEEE1547的規範 88
作者簡介 89

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