【正文】 漢中一次降壓變電所繼電保護(hù)部分初步設(shè)計(jì) I 摘 要 本次設(shè)計(jì)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(jì)算、變電所保護(hù)裝置等的選定進(jìn)行設(shè)計(jì)，通過對(duì)變壓器以及線路保護(hù)配置的選擇來實(shí)現(xiàn)動(dòng)作，從而更好地保證電力系統(tǒng)的安全運(yùn)行。 其主要采用的保護(hù)有繼電保護(hù)、過電壓保護(hù)、瓦斯保護(hù)、變壓器差動(dòng)保護(hù)。在此期間，遇到的種種問題均通過反復(fù)比較、驗(yàn)算，并請(qǐng)教老師得以解決。畢業(yè)設(shè)計(jì)論文由設(shè)計(jì)說明書、設(shè)計(jì)計(jì)算書、一套圖紙（電氣主接線圖、保護(hù)配置圖、保護(hù)展開圖）組成。內(nèi)容較為詳細(xì)，對(duì)今后擴(kuò)建有一定的參考價(jià)值。 本次設(shè)計(jì)是我們?cè)谛Ｆ陂g進(jìn)行的最后一個(gè)非常重要的綜 合性實(shí)踐教學(xué)環(huán)節(jié)，也是我們學(xué)生全面運(yùn)用所學(xué)基礎(chǔ)理論、專業(yè)知識(shí)對(duì)實(shí)際問題進(jìn)行設(shè)計(jì)（或研究）的綜合性訓(xùn)練，同時(shí)還是我們將來走向工作崗位而奠定的基本實(shí)踐。通過本次設(shè)計(jì)可以增強(qiáng)我們運(yùn)用所學(xué)知識(shí)解釋實(shí)際問題的能力和創(chuàng)新能力，以便更好地適應(yīng)工作的需要。變電所的合理設(shè)計(jì)與建設(shè)是一個(gè)極其重要的組成部分。本次設(shè)計(jì)是根據(jù)畢業(yè)設(shè)計(jì)任務(wù)書的要求，綜合所學(xué)專業(yè)知識(shí)及《變電所設(shè)計(jì)》等書籍的有關(guān)內(nèi)容，在指導(dǎo)老師的幫助下，通過本人的精心設(shè)計(jì)論證完成的。整個(gè)設(shè)計(jì)過程中，全面細(xì)致的考慮工程設(shè)計(jì)的可靠性、經(jīng)濟(jì)性、靈活性等諸多因素，最終完成本設(shè)計(jì) 方案。 電力系統(tǒng)繼電保護(hù)的設(shè)計(jì)與配置是否合理，直接影響電力系統(tǒng)的安全運(yùn)行，故選擇保護(hù)方式時(shí)，滿足繼電保護(hù)的基本要求。在上述原則基礎(chǔ)上，明確設(shè)計(jì)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(jì)算、整定計(jì)算、繪制圖紙等主要工作，形成較為完整的論文。 選擇保護(hù)方式和正確的計(jì)算，以保證電力系統(tǒng)的安全運(yùn)行。 關(guān)鍵詞 電力系統(tǒng)，繼電保護(hù)，整定計(jì)算，靈敏度校驗(yàn) 沈陽工程學(xué)院畢 業(yè)設(shè)計(jì)（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(hù)部分初步設(shè)計(jì) 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(tái)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(jì)原則 ...................................................................................................... 3 電氣主接線的基本要求 ...................................................................................................... 3 電氣主接線的設(shè)計(jì)程序 ...................................................................................................... 5 主接線的擬定方案及選擇 .................................................................................................. 6 第三章 短路電流計(jì)算 ................................................................................................................... 8 短路電流計(jì)算的目的、規(guī)定和步驟 ................................................................................... 8 三相短路電流的計(jì)算 .......................................................................................................... 9 第四章 變電所保護(hù)裝置 ............................................................................................................. 12 變電所繼電保護(hù)配置 ........................................................................................................ 12 變壓器的各種保護(hù)原理 .................................................................................................... 17 第二篇 計(jì)算書 ............................................................................................................................. 28 第一章 主變壓器選擇的容量計(jì)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