【正文】 鐵嶺一次降壓變電所繼電保護(hù)部分初步設(shè)計(jì) 目錄 摘要 .................................................................................................................................................. I Abstract ...........................................................................................................................................II 引言 ................................................................................................................................................. 1 第一篇 說明書 ............................................................................................................................... 2 1 待設(shè)計(jì)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 ............................................................................................................. 4 主變臺數(shù)的確定 .............................................................................................................. 4 變壓器形式的選擇 .......................................................................................................... 4 主變?nèi)萘康拇_定 .............................................................................................................. 4 3 變電所電氣主接線的選擇 ......................................................................................................... 6 電氣主接線的設(shè)計(jì)原則 .................................................................................................. 6 電氣主接線的基本要求 .................................................................................................. 6 電氣主接線的設(shè)計(jì)程序 .................................................................................................. 8 主接線的擬定方案及選擇 .............................................................................................. 9 4 短路電流計(jì)算 ............................................................................................................................11 短路電流計(jì)算的目的、規(guī)定和步驟 .............................................................................11 三相短路電流的計(jì)算 .................................................................................................... 12 5 變電所保護(hù)裝置 ....................................................................................................................... 14 變電所繼電保護(hù)配置 .................................................................................................... 14 220kV及中性點(diǎn)直接接地電網(wǎng)線路保護(hù)配置 ................................................. 14 變壓器保護(hù)的配置 ............................................................................................. 15 變壓器的各種保護(hù)原理 ................................................................................................ 16 第二章 計(jì)算書 ............................................................................................................................. 26 1 主變壓器選擇的容量計(jì)算 ....................................................................................................... 26 變電所 60KV的用戶總?cè)萘? ........................................................................................ 26 折算到變壓器的容量 .................................................................................................... 26 據(jù)主變壓器容量選擇規(guī)則 ............................................................................................ 26 2 短路電流計(jì)算 ........................................................................................................................... 27 三相對稱短路計(jì)算 ........................................................................................................ 27 元件阻抗 歸算到系統(tǒng)的標(biāo)幺值計(jì)算 ............................................................................ 27 網(wǎng)絡(luò)化簡 ........................................................................................................................ 28 短路點(diǎn)計(jì)算 .................................................................................................................... 31 60kV側(cè)短路電流 .......................................................................................................... 32 3 整定計(jì)算部分 ........................................................................................................................... 33 整定計(jì)算 ........................................................................................................................ 33 變壓器的整定計(jì)算原則及其整定計(jì)算 ............................................................. 33 變壓器瓦斯保護(hù)整定 ......................................................................................... 33 沈陽工程學(xué)院畢業(yè)設(shè)計(jì) (論文 ） 變壓器差動保護(hù)整定 ......................................................................................... 33 過電流保護(hù)的整定計(jì)算 ..................................................................................... 37 過負(fù)荷保護(hù)的整定計(jì)算 ..................................................................................... 38 變壓器油溫監(jiān)測 ............................................................................................................ 38 致謝 ............................................................................................................................................... 40 參考文獻(xiàn) ....................................................................................................................................... 41 附錄 ............................................................................................................................................... 42 鐵嶺一