【正文】 漢中一次降壓變電所繼電保護部分初步設(shè)計 I 摘 要 本次設(shè)計的主要內(nèi)容是變電所的主變壓器的選擇、主接線的選擇、短路計算、變電所保護裝置等的選定進行設(shè)計，通過對變壓器以及線路保護配置的選擇來實現(xiàn)動作，從而更好地保證電力系統(tǒng)的安全運行。 其主要采用的保護有繼電保護、過電壓保護、瓦斯保護、變壓器差動保護。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(shè)計論文由設(shè)計說明書、設(shè)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(nèi)容較為詳細，對今后擴建有一定的參考價值。 本次設(shè)計是我們在校期間進行的最后一個非常重要的綜 合性實踐教學環(huán)節(jié)，也是我們學生全面運用所學基礎(chǔ)理論、專業(yè)知識對實際問題進行設(shè)計（或研究）的綜合性訓練，同時還是我們將來走向工作崗位而奠定的基本實踐。通過本次設(shè)計可以增強我們運用所學知識解釋實際問題的能力和創(chuàng)新能力，以便更好地適應工作的需要。變電所的合理設(shè)計與建設(shè)是一個極其重要的組成部分。本次設(shè)計是根據(jù)畢業(yè)設(shè)計任務書的要求，綜合所學專業(yè)知識及《變電所設(shè)計》等書籍的有關(guān)內(nèi)容，在指導老師的幫助下，通過本人的精心設(shè)計論證完成的。整個設(shè)計過程中，全面細致的考慮工程設(shè)計的可靠性、經(jīng)濟性、靈活性等諸多因素，最終完成本設(shè)計 方案。 電力系統(tǒng)繼電保護的設(shè)計與配置是否合理，直接影響電力系統(tǒng)的安全運行，故選擇保護方式時，滿足繼電保護的基本要求。在上述原則基礎(chǔ)上，明確設(shè)計的目的，逐步完成主變的選擇、電氣主接線的擬定、短路電流的計算、整定計算、繪制圖紙等主要工作，形成較為完整的論文。 選擇保護方式和正確的計算，以保證電力系統(tǒng)的安全運行。 關(guān)鍵詞 電力系統(tǒng)，繼電保護，整定計算，靈敏度校驗 沈陽工程學院畢 業(yè)設(shè)計（論文） II Abstract This important task of this design is protective relaying design of sabstation through the pootective distribution of the tramsformer and lines. Ensure the Electric power system’s safe operation. 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. Mainly uses the protection has the gas to protect, the transformer differential motio n protection, the electric current, the load, the distance protection. 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. This design is we in school period carries on last the count for much prehensive practice teaching link, also is our student prehensively utilizes studies the basic theory, the specialized knowledge carry on the design to the actual problem (or research) the prehensive training, simultaneously or we future will move towards the basic practice which the work post will establish. May strengthen us through this design to utilize studies the knowledge explanation actual problem the ability and the innovation ability, in order to meets the work need 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. The Electric power system’s protective relaying design and distribution whether is rational directly affect safe operation whon selecting protective duty. Should satisfy basic requires of protectivc relaying selecting protective detty and right calculated setting ensures the electric power system’s safe operation. Key Words electric power system, relay protection, setting(up) to pute, sensitivity calibration 漢中一次降壓變電所繼電保護部分初步設(shè)計 III 目 錄 摘 要 ............................................................................................................................................... I ABSTRACT........................................................................................................................................II 第一篇 說明書 ............................................................................................................................... 1 第一章 主變壓器的選擇 ............................................................................................................... 1 主變壓器臺數(shù)的確定 ........................................................................................................... 1 變壓器形式的選擇 ............................................................................................................... 1 主變?nèi)萘康拇_定 ................................................................................................................... 1 第二章 電氣主接線的選擇 ........................................................................................................... 3 電氣主接線的設(shè)計原則 ...................................................................................................... 3 電氣主接線的基本要求 ...................................................................................................... 3 電氣主接線的設(shè)計程序 ...................................................................................................... 5 主接線的擬定方案及選擇 .................................................................................................. 6 第三章 短路電流計算 ................................................................................................................... 8 短路電流計算的目的、規(guī)定和步驟 ................................................................................... 8 三相短路電流的計算 .......................................................................................................... 9 第四章 變電所保護裝置 ............................................................................................................. 12 變電所繼電保護配置 ........................................................................................................ 12 變壓器的各種保護原理 .................................................................................................... 17 第二篇 計算書 ............................................................................................................................. 28 第一章 主變壓器選擇的容量計算 ............................................................................................. 28 變電所 60KV 的用戶總?cè)萘? .............................................................................................. 28 折算到變壓器的容量 ........................................................................................................ 28 確定主變壓器容量 ............................................................................................................ 28