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研究生:劉豐銘
研究生(外文):feng-ming Liu
論文名稱:一擴建汽電共生鋼鐵廠之電力系統分析與設計
論文名稱(外文):Power System Analysis and Design of an Expanding Steel Cogeneration Plant
指導教授:許振廷許振廷引用關係
學位類別:碩士
校院名稱:南台科技大學
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:115
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本論文主要在執行一擴建汽電共生鋼鐵廠的電力系統設計與分析,研究項目包括工廠電力系統資料蒐集、短路故障電流分析、負載潮流分析、電壓驟降分析與電力諧波分析。在目前所規劃的系統架構與參數下,正確裝置電容器組並調整部分變壓器分接頭設定,則工廠各匯流排的電壓皆可維持在正常範圍內變動,且責任分界點之功率因數亦可維持在0.95以上。此外,文中亦適度的調整變壓器阻抗值,使得各匯流排的故障電流能在限制的範圍內。對驟變負載所引起之電壓波動而言,若工廠能裝設類似靜態虛功補償器之連續虛功調整設備,則熱軋廠之最大電壓波動可從10.7% 降為5%,此外,大型感應馬達啟動所造成的最大電壓降達到11.43%,文中採用Y-Δ降壓方式來協助馬達啟動。擴建後的工廠若只裝設電容器,則責任分界點之總諧波電壓和總需求電流失真百分比分別為1.68% 和1.62%;若擴建的工廠裝設所設計的濾波器後,總諧波電壓和總需求電流失真百分比分別降為0.45% 和0.42%,除了符合電力公司之規定外,更可減少諧波污染對全廠設備所造成的影響。經由本文的研究,確可有效提升工廠電力品質與運轉能力,並可提供給相關業者作為參考。
This thesis investigates the power system design and analysis of an expanding steel cogeneration plant. The items like short circuit, power flow, voltage drop and harmonic analyses have been performed. The location and capacity of shunt capacitors, and the tap position of transformers are both determined to maintain all the buses voltage at acceptable range and to keep the power factor at PCC above 0.95. To limit the fault current for all buses in the plant, the impedances of transformers are designed although they consumed more reactive power from the system. The voltage drop caused by the dramatic reactive power variation of hot strip mill and the starting of induction motors were calculated by using the maximum reactive power fluctuation method and simulated by applying the PSAF software. It is found that the maximum voltage variation can be reduced form 10.7% to 5% if proper SVC was installed at the hot strip mill. Also, the voltage sag due to the starting of induction motor was reached to 11.43% and therefore the auxiliary starting equipment like Y-Δ assiatance may be necessary. For the expanding steel plant, the total voltage and the total demand current harmonic distortion at PCC are calculated as 1.68% and 1.62%, respectively with the installation of capacitors only. However, they can be reduced to 0.45% and 0.42% if the suggestion passive filters were installed. It is concluded that the power quality and operation performance of the steel plant can be effectively enhanced by executing the relative power system analyses.
摘要··························································································································i
英文摘要·················································································································ii
致謝························································································································iii
目次························································································································iv
表目錄···················································································································vii
圖目錄····················································································································ix
第一章 緒論········································································································1
1.1 前言········································································································1
1.2 章節說明································································································3
第二章 汽電共生系統························································································5
2.1 汽電共生的定義與種類········································································5
2.2 汽電共生的發展····················································································8
2.3 汽電共生系統與台電併聯管制標準···················································10
2.4 汽電共生鋼鐵廠··················································································13
2.4.1 汽電共生鋼鐵廠之電力系統架構··············································13
2.4.2 汽電共生鋼鐵廠之電力設備相關資料······································16
第三章 汽電共生廠之負載潮流與短路故障分析···········································18
3.1 負載潮流基本原理之簡介··································································18
3.2 汽電廠之負載潮流分析······································································25
3.3 短路故障基本原理之簡介··································································29
3.3.1 故障型態·····················································································29
3.3.2 故障電流來源·············································································30
3.3.3 故障電流之定義·········································································31
3.4 汽電廠之三相短路故障分析······························································32
第四章 汽電共生廠之電壓驟降分析······························································38
4.1 最大無效功率變動法··········································································40
4.2 熱軋廠運轉之電壓變化分析······························································42
4.2.1 使用最大無效功率變動法計算熱軋廠匯流排電壓變化··········43
4.2.2 使用套裝軟體計算熱軋廠匯流排電壓變化······························45
4.3 大型感應馬達啟動分析······································································50
4.3.1 使用最大無效功率變動法計算感應馬達啟動電壓降··············51
4.3.2 以套裝軟體模擬感應馬達啟動現象··········································52
第五章 汽電共生廠之諧波分析······································································60
5.1 諧波概論與定義··················································································60
5.2 電力元件之諧波模型··········································································62
5.3 電力系統之諧波源··············································································65
5.3.1 三相整流器·················································································66
5.3.2 變週器·························································································67
5.4 汽電共生廠之諧波源設備··································································76
5.4.1 現有廠區之諧波源設備·····························································76
5.4.2 擴建後之諧波源設備·································································80
5.5 汽電共生廠系統諧波分析··································································84
第六章 結論與未來研究方向··············································································91
6.1 結論······································································································91
6.2 未來研究方向······················································································92
參考文獻···············································································································93
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