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研究生:黃維澤
研究生(外文):WEI-TZER HUANG
論文名稱:配電饋線由放射型升級為常閉環路型之研究
論文名稱(外文):Study of Upgrading Distribution Feeders from Radial to Normally Closed-Loop Arrangement
指導教授:陳在相陳在相引用關係
指導教授(外文):TSAI-HSIANG CHEN
學位類別:博士
校院名稱:國立臺灣科技大學
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:2005
畢業學年度:93
語文別:中文
論文頁數:144
中文關鍵詞:配電饋線放射型常閉環路型短路容量法
外文關鍵詞:distribution feedersradialclosed-loopshort-circuit MVA method
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本論文旨在研究配電饋線型態升級之問題。藉由兩放射型饋線互連可形成四種可能的常閉環路饋線型態,亦即:(1)二條饋供自同一變電所同一主變之饋線互連形成之典型常閉環路饋線—Type I;(2)二條引接自同一變電所不同主變之饋線互連形成跨越主變常閉環路饋線,此一型態又可進一步區分為二個次型態,連絡斷路器常開型—Type II.1與連絡斷路器常閉型—Type II.2;(3)二條由不同變電所不同主變饋供之饋線互連形成互連型常閉環路饋線。由於饋線型態不同,升級的影響因素以及相關的配套措施自然有所差異;此外,各型態之運轉特性、操作方式、可行性以及供電可靠度亦各自有異,值得深入探究。
本論文首先提出既有放射型配電饋線升級為常閉環路型的四種可能型態。其次,依據四種可能之常閉環路型態,作一完整之學理探討,分析配電饋線升級之影響因素,隨之,推導饋線沿線的短路容量公式,以便分析配電饋線升級前後在不同系統參數及型態下,饋線沿線短路容量變化情形,並探討配電饋線升級前後以及升級後在非常態運轉情況下之電力潮流、電壓降以及主變壓器與其饋線負載量變化情形;此外,更推導配電饋線升級前後之線路損失公式,分析電路結構改變對線路損失的影響情形;另外,亦探討、分析含負載轉供機制較為可行之常閉環路系統架構、運轉操作方式,以及主變壓器及其饋線之常態運轉最高負載量與利用因數。最後,綜合歸納整理饋線型態升級所造成之影響及衝擊,並研擬相關配套措施,同時作一總結。本論文所呈現之各項研究成果,可供配電系統相關人員從事配電饋線升級規劃,以及運轉與維護常閉環路饋線之重要參考。
This dissertation examines the issues of upgrading distribution feeders from radial to nominally closed loop arrangements. Four types of normally closed loop arrangement will possibly be formed by tying two existing radial feeders at their ends normally. First, two radial feeders fed by a substation transformer to form a typical normally closed loop named as Type I; second, two radial feeders fed by two different substation transformers located at the same distribution substation to form a cross-transformer-type normally closed loop. The latter type is further divided into two subtypes based on whether the tie breaker of the secondary buses of the two transformers is normally closed or open, the tie breaker is normally open named as Type II.1, and the tie breaker is normally closed named as Type II.2; third, two radial feeders are fed by two different transformers located in different substations to form an interconnection-type normally closed loop name as Type III. Because of the difference in these four types of feeder arrangements, the factors affected the upgrading of distribution feeder and the required supporting measures are quite different. Besides, the operating characteristics, the mode of operations, the feasibility, and the reliability are divergent naturally. Accordingly, it is worthy of further study.
First of all, four possible feeder arrangements for forming a normally closed loop upgrading from existing radial feeders are proposed, and then the factors that may predominately affect the distribution feeder upgrading are discussed theoretically. Next, the variations of short-circuit capacities along a feeder before and after the distribution feeder upgraded under different parameters and types were evaluated via the derivation of the short-circuit capacities formulas. And the power flows, voltage drops, and loading variations of the substation transformers and the feeders were also discussed before and after the distribution feeder upgraded, as well as the abnormal operations after the distribution feeder upgraded. Additionally, the resistive line loss formulas were derived to analyze the impacts on line loss due to the changing of the structure of distribution feeders; and further, the feasible closed loop feeder arrangements with load transfer, the corresponding operating modes, and the maximum loadings as well as utilization factors of the substation transformers and feeders under normal operation condition were explored here. Finally, to sum up the impacts of distribution feeders upgrading, the required supporting measures have been drawn up. The outcomes are of value to the distribution engineers while planning to upgrade the distribution feeder, and operating and maintaining the closed loop type of feeder arrangement.
中文摘要 I
英文摘要 III
誌謝 V
目錄 VI
符號索引 IX
圖表索引 X
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究方法與步驟 5
1.3 主要貢獻 7
1.4 論文架構 9
第二章 饋線型態升級之影響因素分析 11
2.1 前言 11
2.2 饋線型態簡介 12
2.3 影響因素之探討與分析 14
2.3.1 Type I 15
2.3.2 Type II 17
2.3.3 Type III 18
2.4 綜合分析與討論 19
第三章 饋線型態升級對饋線沿線短路容量之影響分析 21
3.1 前言 21
3.2 問題描述與求解方法 22
3.2.1 問題描述 22
3.2.2 短路容量法 24
3.3 數理分析與探討 27
3.3.1 放射型架構 29
3.3.2 常閉環路型架構 31
3.4 綜合比較與分析 37
3.5 本章結論 43
第四章 饋線型態升級對系統運轉特性之影響分析 44
4.1 前言 44
4.2 範例系統設計及分析案例說明 45
4.3 模擬結果之分析與探討 49
4.3.1 Type I 49
4.3.2 Type II.1 52
4.3.3 Type II.2 55
4.3.4 Type III 57
4.4 綜合比較與分析 60
4.5 本章結論 61
第五章 饋線型態升級對線路損失之影響分析 62
5.1 前言 62
5.2 問題描述 63
5.3 線路損失關係式推導 68
5.4 範例系統分析 72
5.4.1 範例系統及相關參數設定說明 72
5.4.2 模擬結果分析與探討 75
5.5 本章結論 76
第六章 含負載轉供機制之常閉環路系統架構及其運轉方式之探討與分析 81
6.1 前言 81
6.2 系統規劃的考量因素與原則 82
6.3 Type I之系統架構及其運轉方式 83
6.3.1 系統架構 84
6.3.2 運轉方式 89
6.4 Type II之系統架構及其運轉方式 91
6.4.1 系統架構 92
6.4.2 運轉方式 98
6.5 Type III之系統架構及其運轉方式 100
6.5.1 系統架構 100
6.5.2 運轉方式 101
6.6 綜合比較與分析 103
第七章 饋線型態升級之影響與衝擊及其相關配套措施 105
7.1 前言 105
7.2 影響與衝擊 106
7.3 相關配套措施 108
7.4 綜合考量 111
7.4.1 負載轉供點之選定原則 111
7.4.2 主環路開關投入注意事項 124
7.4.3 有載下負載轉供之條件 125
7.5 本章結論 126
第八章 結論與未來研究方向 127
8.1 結論 127
8.2 未來研究方向 129
參考文獻 130
作者簡介 138
授權書 144
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