【正文】 220KV 鐵嶺 一次降壓變電所繼電保護(hù)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(hù) 裝置等的選定進(jìn)行設(shè)計，通過對變壓器以及線路保護(hù)配置的選擇，來保證電力系統(tǒng)的安全運行。 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)、變壓器差動保護(hù)。 本次設(shè)計是我們在校期間進(jìn)行的最后一個非常重要的綜合性實踐教學(xué)環(huán)節(jié)，也是我們學(xué)生全面運用所學(xué)基礎(chǔ)理論、專業(yè)知識對實際問題進(jìn)行設(shè)計（或研究）的綜合性訓(xùn)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(xué)知識解釋實際問題的能力和創(chuàng)新能力， 以便更好地適應(yīng)工作的需要。 電力系統(tǒng)繼電保護(hù)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(hù)方式時，滿足繼電保護(hù)的基本要求。選擇保護(hù)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(hù)，整定計算，靈敏度校驗 沈陽工程學(xué)院畢業(yè)設(shè)計 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. Mainly uses the protection has the gas to protect, the transformer differential motion protection, the electric current, the load, the distance protection. 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 well. 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 220KV 鐵嶺 一次降壓變電所繼電保護(hù)部分初步設(shè)計 III 目錄 摘 要 ............................................................................................................................................ I Abstract .............................................................................................................................................II 引 言 ............................................................................................................................................... 1 第一篇 說明書 .................................................................................................................................. 2 1 待設(shè)計變電所原始資料分析 .......................................................................................................... 2 變電所概況介紹 ................................................................................................................... 2 變電所 60KV的用戶負(fù)荷表 ................................................................................................... 2 電力系統(tǒng)接線方式圖 ............................................................................................................ 2 2 變電所主變壓器的選擇 ................................................................................................................... 3 3 變電所電氣主接線的選擇 ............................................................................................................... 5 電氣主接線的設(shè)計原則 ........................................................................................................ 5 電氣主接線的基本要求 ........................................................................................................ 5 電氣主接線的設(shè)計程序 ........................................................................................................ 7 主接線的擬定方案及選擇 ..................................................................................................... 7 4 短路電流計算 ................................................................................................................................. 9 短路電流計算的目的、規(guī)定和步驟 ....................................................................................... 9 三相短路電流的計算 ........................................................................................................ 10 5 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 ...................................................................................................... 16 第二篇 計算書 ................................................................................................................................ 29 1 主變壓器選擇的容量計算 ............................................................................................................. 29 變電所 60KV的用戶總?cè)萘? ................................................................................................. 29 .......................................................................................................... 29 ................................................................................................... 29 2 短路電流計算 ............................................................................................................................... 30 三相對稱短路計算 ............................................................................................................. 30 元件阻抗歸算到系統(tǒng)的標(biāo)幺值計算 ..................................................................................... 30 網(wǎng)絡(luò)化簡 ........................................................................................................................... 31 短路點計算 ........................................................................................................................ 35 60kV側(cè)最小運行方式下的短路電流 .............................................