摘 要
隨著高科技產業的發展，電力品質對科學園區內高科技產業用戶而言已成為重要的課題。因台電系統網路偶發事故，所造成的電壓降及電力系統穩定度問題，往往會導致科學園區內工業用戶嚴重的製程損失。主要係由於高科技產業所使用的製程機台多屬於電力電子設備，當電壓降達30﹪時，將造成機台跳機，且將花費長時間復機後才能恢復產能。為了提高供電可靠度及電力品質，本論文選擇在新竹科學園區內之汽電共生系統為研究對象，以解決與台電併聯時之短路容量問題，同時分析台電系統事故時之電壓降與系統穩定度。在短路分析中藉由使用ANSI與IEC二種不同的定義方式求解故障電流大小；由執行暫態穩定度分析，可驗證臨界清除時間及所設計之聯結線保護電驛，能否確實使園區內廠商不致因台電系統故障而停機。同時執行汽電廠於台電系統發生故障時之穩定度分析，並探討汽電廠發電機組操作在不同運轉模式下，當與台電系統解聯後頻率之變化及執行卸載之策略。此外亦考慮以靜態虛功補償器來減輕因事故所造成電壓驟降之問題。經由上述研究，正確的規劃工業電力系統，與使用汽電共生發電及靜態虛功補償器，將可改善高科技產業用戶之供電可靠度與電力品質。

ABSTRACT
With the development of high-tech industry, the power quality has become a critical issue for the industrial customers in science park. The voltage sag and power system stability problems due to fault contingency in Taipower network has caused serious production loss. The manufacturing process platforms, which are driven by power electronics equipments may shutdown when the voltage dip exceeds 30% and it will take long time for the restoration of production. To enhance the service reliability and power quality, the new cogeneration system in Hsin Chu Science Park has been selected for case study to solve the problems of short circuit capacity and voltage sag. The short circuit analysis by both ANSI and IEC is performed to find the magnitudes of fault currents. The transient stability analysis is executed to identify the critical clearing time to support the design of protective relays for tie line tripping. The static var compensator (SVC) is also considered in the simulation to investigate the mitigation of system voltage drop due to fault contingency. It is found that the implementation of cogenerators and SVC can improve the electricity service quality for high-tech customers with proper design of industrial power systems.

目 錄

摘要 Ⅰ

Abstract Ⅲ

目錄 Ⅴ

圖目錄 Ⅶ

表目錄 Ⅹ

第一章 緒 1
1–1 研究背景與動機 1
1–2 研究之目的 3
1–3 分析軟體簡介 3
1–4 內容架構概述 5

第二章 汽電共生系統架構 6
2–1 新竹科學園區之供電及用電概況 6
2–2 系統架構 9

第三章 短路故障分析 14
3–1 前言 14
3–2 IEC 909 14
3–3 ANSI / IEEEC37.010-1979 17
3–4 實例分析 20
3–5 小結 29

第四章 暫態穩定度分析 30
4–1 前言 30
4–2 電力系統數學模型 33
4–2–1 發電機數學模型之推導與建立 33
4–2–2 激磁系統模型 38
4–2–3 調速系統模型 41
4–2–4 負載模型 43
4–3 暫態穩定度分析 44
4–4 汽電共生廠之解聯電驛 48
4–5 卸載策略 62
4–6 靜態虛功補償器對暫態穩定度之改善 67
4–6–1 靜態虛功補償器之概述 67
4–6–2 SVC之動態模型 69
4–6–3 以SVC改善因故障而引起電壓驟降之問題 72

第五章 結論 77
5–1 結論 77
5–2 未來研究方向 78

參考文獻 80

參考文獻
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