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研究生:蔡依樵
研究生(外文):I-Chiao Tsai
論文名稱:串疊式多階變流器應用於太陽光伏系統及故障診斷與容耐技術
論文名稱(外文):Cascaded Multilevel Inverter for Photovoltaic System and Fault Diagnosis and Tolerant Strategy
指導教授:葉增雄
指導教授(外文):Tzeng-Shong Yeh
學位類別:碩士
校院名稱:國立高雄應用科技大學
系所名稱:電機工程系
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:2010
畢業學年度:98
語文別:中文
論文頁數:109
中文關鍵詞:串疊式多階變流器太陽光伏系統故障診斷故障容耐
外文關鍵詞:Cascaded Multilevel InverterPhotovoltaic SystemFault DiagnosisFault Tolerance
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本論文探討串疊式多階變流器及太陽光伏系統之架構與原理,利用模擬軟體MATLAB建構變流器功率電路,並將其應用於太陽光伏系統上。隨後探討多階變流器功率元件發生短路故障時之輸出電壓頻譜,據此提出一偵測與診斷模組用以診斷故障單元的位置,於診斷後將故障單元短路隔離,同時加入故障容耐技術以平衡變流器輸出電壓,使得系統得以繼續運作。由模擬結果證實,所提出之偵測診斷模組具有正確診斷的效果,而故障容耐技術亦能有效維持輸出電壓之平衡。
This thesis studies the structure and principle of Cascaded H-bridge Multilevel Inverter and Photovoltaic System. The MATLAB is used to build the model of power circuit of the Inverter for PV System. In addition, the harmonic characteristics of the multilevel inverter output voltage are studied when the power elements short-circuit. According to the analysis, a fault detection and diagnosis module is proposed for identify the faulty cell. Following the fault diagnosis and bypass the faulty cell, a fault tolerance strategy is used to maintain the inverter in continuous working. Simulation results show that, the proposed module for fault detection and diagnosis has correct effect for fault identification. Besides, the fault tolerance strategy allows the inverter for continuous providing balanced output voltage.
摘 要 i
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 相關文獻回顧 2
1.3 論文架構概述 4
第二章 多階變流器及調變原理 5
2.1 多階變流器 5
2.1.1 二極體箝制變流器 7
2.1.2 電容箝制變流器 10
2.1.3 串疊式變流器 18
2.1.4 混合式全橋變流器 27
2.2 功率元件切換控制技術 29
2.2.1 正弦脈波寬度調變技術(SPWM) 30
2.2.2 移相正弦脈波寬度調變技術(Phase-Shifted SPWM) 34
第三章 太陽光伏系統 40
3.1 前言 40
3.2 太陽光伏發電原理 41
3.3 太陽光伏電池特性 43
3.4 多階變流器應用於太陽光伏系統之架構及模擬 50
第四章 多階變流器故障偵測與診斷 53
4.1 前言 53
4.2 九階串疊式變流器架構 54
4.3 多階變流器故障特性分析 56
4.3.1 變流器正常運作之電壓頻譜 57
4.3.2 變流器功率元件之故障特性分析 58
4.4 電壓諧波量測技術 59
4.5 故障偵測與診斷 74
第五章 故障容耐技術 78
5.1 前言 78
5.2 多階變流器輸出電壓之特性分析 79
5.3 傳統平衡方法 81
5.4 中性點偏移技術 82
5.5 模擬結果與比較 86
第六章 結論與未來研究方向 94
6.1 結論 94
6.2 未來研究方向 96
參考文獻 97
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