【正文】 . . 龍灣二次 60/10KV降壓變電所繼電保護部分初步設計 The relaying design for electrical part of Longwan60KV step down substation （該論文為畢業(yè)論文，比課程設計復雜，同時論文結構和內容與課程設計內容差異很大。參考時留意異同。）. . 摘 要 電力系統(tǒng)專業(yè)的畢業(yè)設計是一次比較綜合的訓練，它是我們將在校期間所學的專業(yè)知識進行理論與實踐的很好結合，運用理論知識和所學到的專業(yè)技能進行工程設計和科學研究，提高分析問題和解決問 題的能力。在完成此設計過程中，我們可以學習電力工程設計、技術問題研究的程序和方法，獲得搜集資料、查閱文獻、調查研究、方案比較、設計制圖等多方面訓練，并進一步補充新知識和技能。本畢業(yè)設計論文是 60/10KV 二次降壓變電所電氣部分初步設計。為了保證供電的可靠性和一次性滿足遠期負荷的要求，按照遠期負荷規(guī)劃進行設計建設，從而保證變電所能夠長期可靠供電。 根據畢業(yè)設計任務書的要求，綜合所學專業(yè)知識及《變電所設計》等書籍的有關內容，設計過程中完成了主變選擇、電氣主接線的擬定、短路計算、保護整定計算、配電裝置的規(guī)劃、繼電 保護和自動裝置的規(guī)劃等主要工作。在此期間，遇到的種種問題均通過反復比較、驗算，并請教老師得以解決。畢業(yè)設計論文由設計說明書、設計計算書、一套圖紙（電氣主接線圖、保護配置圖、保護展開圖）組成。內容較為詳細，對今后擴建有一定的參考價值。 近年來，電力在世界各國能源和經濟發(fā)展中的作用日益增長，它已成為現(xiàn)代社會實用最廣、需要最快的能源。變電所的合理設計與建設是一個極其重要的組成部分。本次設計是根據畢業(yè)設計任務書的要求，綜合所學專業(yè)知識及《變電所設計》等書籍的有關內容，在指導老師的幫助下，通過本人的精心設計論證完成的 。整個設計過程中，全面細致的考慮工程設計的可靠性、經濟性、靈活性等諸多因素，最終完成本設計方案。通過完成此畢業(yè)設計論文，進一步領會我國電力工業(yè)建設的政策觀念和經濟觀點，培養(yǎng)對工程技術、經濟進行較全面的綜合分析能力。 關鍵詞 變電所 , 短路計算，繼電保護，保護配置 . . Abstract The professional graduate in system in electric power design is once more synthesize of training, it is we will during the period of school a profession for learning knowledge proceed theories and practice very good bination, make use of the theories knowledge proceeds with a profession for learning technical ability engineering design with science study, increase analyze problem with problemsolving ability. In plete this design process, we can study the electric power engineering the design, investigative procedure in problem in technique with method, be collected information, checked the cultural heritage, investigate the research, project parison and design the various training in etc. in graphics, bine further plement the new information knows with technical ability. This graduate design thesis is a 60/10 KV a declining to press to change to give or get an electric shock an electricity parts of first steps design. For the sake of dependable that guarantee the power supply with a request that contented longterm burthen, carries according to the forward the programming proceeding design developments, from but guarantee to change to give or get an electric shock can longterm dependable power supply. Design the request of the mission book according to the graduate, synthesize a programming for learning profession knowledge and 《 changing giving or get an electric shock the 》 designed waiting dog39。s ear relevantly contents, designing in the process pleting lord changing choice, electricity lord connecting linear draw up, short circuit puting, electricity equipments choosing, going together with electricity equipping, after give or get an electric shock the protection with the programming of the automatic device with defend protective programming in thunder etc. main work. Here period, all kinds problems that meet all passes to pare, check to calculate again and again, and ask the can solution in teacher. Graduate to design the thesis from design the manual, design calculation book, a set of diagrams paper( the electricity lord connects the line diagram, total flat surface arranges the diagram and go together with electricity equip cross section diagram, defend thunder protection diagram) constitute. The contents is more detailed, to from now on extend to consults certainly value. For this year, electric power is in international munity energy with economy develop of the function increases increasingly, it have bee modern the society is practical the most widely and need the quickest energy. Change the reasonable design that give or get an electric shock are a with developments very constituting the part importantly. This design is at guiding teacher descend, passing oneself of design what argument plete with meticulous care. Whole design process inside, pletely dependable, economic, vivid...etc. many factors that meticulous consideration engineering design, end plete this . . design project. Pass to plete this graduate design the thesis, further appreciating the our country the policy idea of electric power industry developments with the economic standpoint, educates to proceed to the engineering technique, economy more pletely to synthesize the analytical skill. Key words substation ,short circuit puting ,relaying ,Protect an allocation . . 目 錄 摘 要 ........................................................................................................................................... I ABSTRACT ....................................................................................................................................II 引 言 .......................................................................................................................................... 1 第一篇 說明書 ............................................................................................................................ 2 第一章 主變壓器的選擇 ............................................................................................................ 2 第二章 電氣主接線的選擇 ........................................................................................................ 5 主接線的設計原則及基本要求 .......................................... 5 本變電所主接線的選擇 ................................................ 6 第三章 短路電流的計算說明 .................................................................................................... 9 短路電流計算的目的 .................................................. 9 短路的基本類型 ...................................................... 9 短路電流計算的基本假定 .............................................. 9 一般規(guī)定 ............................................................ 9 計算步驟 ........................................................... 10 計算方法 ....................................