臺灣博碩士論文加值系統

本論文提出檢測高壓電力電容器的故障狀況的新方法，其目的是藉由檢測系統能夠預先預測出電力電容器可能發生的故障狀況及類別，進而提早改變電力電容器之操作狀態，可大幅降低電力電容器損壞之程度，也能夠清楚地的了解是電力電容器(Power Capacitors)損壞之元件。首先，本研究現場實測建立高壓電力電容之電路模型, 並利用電路模擬電力電容器之故障狀況，為能取出故障狀況特徵，本研究提出利用混沌同步檢測分析法，建立電壓及電流之混沌誤差散佈圖，並且以誤差散佈圖之重心點(或稱混沌眼)作為故障檢測之特徵，使用本方法之優點是可大幅壓縮特徵擷取之資料量，同使能夠有效地偵測電力電容器在損壞狀態中微小的變動，進而提前改變電力電容器之運轉狀態，預先執行緊急之應變措施，避免重大事故發生。本研究經由一套22.8kV/100kVA之高壓電力電容器測試後，其故障檢測之準確率為90.5%，證明所提之新方法相當適合應用於電力系統線上(on–line)即時監控之工具。

A new approach to detect the failure of high-voltage power capacitor was proposed to allow the prediction of possible faults and categories of a power capacitor. First, a circuit model simulating a high-voltage power capacitor was built for measurement. To determine the characteristics of fault, the chaotic synchronization detection was employed to establish the chaos error distribution diagram of voltage and current with the center of gravity of the error distribution (or the chaos eyes) as the features of the fault diagnosis. The advantage of using this approach is that the amount of data from feature capturing is greatly reduced while it is capable of effectively detecting minute changes in the damage state of power capacitor, which allows change of operating state of power capacitor in advance and initiation of response measure before anything serious occurs. Finally, a 22.8kV/100kVAR power capacitor was put to test and it was proven that the new approach had the potential to be used as a tool for online real-time monitoring of power systems.

中文摘要 I
Abstract II
致謝 III
目錄 IV
圖目錄 VII
表目錄 XI
符號說明 XII
第一章 緒論 1
1. 1 研究背景與目的 1
1. 2 文獻回顧 2
1. 3本論文之貢獻 3
1. 4論文架構 4
第二章 電力電容簡介 6
2. 1 電力電容構造 6
2. 2電力電容器中的電介質 9
2. 3電力電容器之功用 11
第三章 電力電容失效分析及線上檢測方法 13
3. 1 介質損耗簡介 13
3. 2 電力電容失效分析 14
3. 3 線上檢測方法 16
3. 4 測試方法 18
3.4.1電橋法測量分析 19
3.4.2正弦波參數法 20
3.4.3諧波分析法 22
第四章 本文所提之檢測及診斷方法 27
4.1系統架構 27
4.2混沌理論簡介 28
4. 3混沌同步檢測方法 29
4. 4可拓理論 32
4.4.1物元理論 33
4.4.2可拓關聯函數 35
4. 5可拓檢測演算法 37
第五章 實驗結果與討論 42
5.1 測試條件 42
5.2 等效電路之驗證 45
5.2.1故障檢測系統介面介紹 45
5.2.2資料擷取卡 46
5.2.3人機介面設計 47
5.2.4混沌眼之驗證 49
5.2.5介質損耗因數之驗證 58
5.3 電力電容故障檢測系統類別介紹 59
5.3.1電力電容故障檢測系統類別介紹 59
5.3.2單相電容衰減 60
5.3.3兩相電容衰減 62
5.3.4三相電容衰減 63
5.3.5單相放電電阻衰減 65
5.3.6兩相放電電阻衰減 66
5.3.7三相放電電阻衰減 67
5.3.8絕緣電阻衰減 68
5.4 可拓故障檢測 70
第六章 結論與未來展望 75
6.1結論 75
6.2未來展望 75
參考文獻 76
附件 81

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