臺灣博碩士論文加值系統

近年來，電力品質(Power Quality)問題在電力公司與用戶間已成為主要關心的課題。典型的電力品質問題包含因事故所引起持續幾週波至幾秒的短時間電壓驟降(voltage sag)或電容器切換引起的暫態。
由於設備或線路故障所造成的電壓驟降因而影響到用戶的精密設備跳脫或損壞，在電力自由化之後將會是一個大問題，因為會有責任歸屬及賠償的問題，在電力公司與用戶間皆然。
要如何去抑制暫態現象的問題已引起了相當多的討論，亦是值得深入研究的課題。但引起這些暫態現象來源位置的研究卻較少論及，對於今日的電力品質要求日趨嚴格，以及今日科技工業的精密設備、微電腦資訊設備等其他用電負載，已對這些暫態現象相當的敏感，嚴重者更可使這些設備跳脫或損壞，尤其是可調速控制設備(Adjustable Speed Drives, ASDs)。所以，對於電力公司及用戶要如何去得知暫態來源的位置並進而去採取預防措施及量測上的矯正，其位置的判別這將是一個刻不容緩的課題。
因此，本文將針對暫態源位置辨識方法(僅針對線路故障造成的電壓驟降及電容器切換)，整理相關文獻並作一個綜合評估，且提出一套暫態源辨識法。最後，利用EMTP/ATP與Matlab軟體來進行範例系統模擬與分析，模擬結果將可驗證本文方法之有效性及準確性。

Power quality problems have become a matter of concern for both utilities and customers in the power system, typical examples including voltage sags and electric utility capacitor switching transients.
The voltage sag is caused by equipment or the line fault. Therefore the sensitive equipment which influences users is tripped or damaged. The sag problems become great concerns after deregulated power system, since there is question of responsibility between different controlled transmission networks.
Up to date, there are many studies which focus on eliminating or controlling capacitor switching associated transients. However, literature survey shows that subjects dealing with identifying and tracking the source of voltage sag are rarely discussed. The purpose of this thesis is to fill such gap.
With the widespread use of transient-sensitive loads nowadays, power quality problems become an increasing concern. Electric utility capacitor switching transients may cause nuisance tripping or damages of such loads, especially for adjustable-speed drives (ASDs), which in turn cause great economical losses on industrial processes. Therefore, how to identify and track the locations of sag transient sources have attracted more attention of utility engineers and scholars.
This thesis firstly gives a literature overview on available publications, which focuses on the capacitor switching transients and voltage sag caused by the line fault. Then the author proposes an efficient approach to locating sources associated both the utility capacitor switching transients and lines fault. Simulation results obtained by using EMTP/ATP, MATLAB, and actual measurement show that the proposed approach is effective and relatively accurate in comparing with existing approaches.

中文摘要
英文摘要
目錄
圖目錄
表目錄
第一章 緒論
1.1 研究動機
1.2 研究目的及方法
1.3 本論文之貢獻
1.4 各章節概要
第二章 電力品質暫態問題分析
2.1 前言
2.2 電力品質干擾問題
2.3 電力品質的暫態問題
2.4 暫態現象對電器設備之影響
2.5 電容器切換暫態之影響
第三章 電壓驟降產生之暫態問題分析
3.1 前言
3.2 電壓驟降成因
3.3 電壓有效值及電壓驟降的定義
3.4 電壓驟降幅度之計算
3.5 相角跳躍
3.6 電壓驟降標準ITI（CBEMA）曲線及SEMI F47-0200
3.7 本章結論
第四章 電容器切換暫態問題分析
4.1 前言
4.2 電容器切換暫態之基本原理
4.3 電容器切換所引起之暫態現象
4.4 抑制電容器切換暫態的方法
4.5 本章結論
第五章 暫態源位置的辨識方法
5.1 前言
5.2 暫態頻率的函數表示法
5.3 特徵分析法
5.4 快速傅立葉法
5.5 倒卡門濾波器法
5.6 擾動必v及擾動能量法
5.7 相角區間辨識法
5.8 相角變化辨識法
5.9 電阻正負極性守為基礎的電壓驟降辨識法
5.10 依據事故特性原因判斷電壓驟降位置辨識法
5.11 分支電流變化比例辨識法
5.12 本章結論
第六章 監控儀表的安裝位置選擇
6.1 前言
6.2 決定電力品質監控儀表的安裝位置順序的數學模型
6.3 IEEE14、30BUS、某一地區實際輸電系統之最佳安裝監控儀表位置排序
6.4 本章結論
第七章 範例模擬分析
7.1 範例系統簡介
7.2 暫態源辨識法之模擬辨識流程
7.3 IEEE十四個匯流排系統之模擬與分析
7.4 IEEE三十個匯流排系統之模擬與分析
7.5 某一區域實際輸電系統之模擬與分析
7.6 本章結論
第八章 結論與未來研究方向
8.1 結論
8.2 未來研究方向
參考文獻

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