【正文】 .................................................................................................................................................. 1 前言 .................................................................................................................................................. 3 第一部分 說明書 ............................................................................................................................. 5 第一章 設(shè)計任務(wù) ............................................................................................................................. 5 ............................................................................................................................. 5 .................................................................................................................. 5 .................................................................................................................. 5 .................................................................................................................. 5 第二章 用電設(shè)備計算 ..................................................................................................................... 6 宿舍區(qū)樓層用電設(shè)備計算 ................................................................................................. 6 照明組 ................................................................................................................... 6 電風(fēng)扇組 ................................................................................................................. 6 電腦組 ..................................................................................................................... 7 空調(diào)組 ..................................................................................................................... 7 實訓(xùn)工廠計算 ..................................................................................................................... 7 吊扇 41 個 (65W) ............................................................................................. 7 吊燈 16（ 30W） .................................................................................................... 8 白熾燈 90 （ 40W） ............................................................................................. 8 縫衣機 150 （ 400W） .......................................................................................... 8 加熱蒸汽鍋爐 9KW3 .......................................................................................... 8 空調(diào) 6 個（大）（ 2022W） ................................................................................... 9 第三章 變電所及主變壓器的選擇 ................................................................................................. 9 ............................................................................................. 9 ............................................................................. 9 ........................................................................................................... 10 ........................................................................... 10 ........................................................................................ 10 ，按上面考慮的兩種主變壓器的方 案可以設(shè)計下列兩種主結(jié)線方案： ......................................................................................................... 11 第四章 變壓器有關(guān)保護 ............................................................................................................... 13 瓦斯保護 ........................................................................................................................... 13 縱差保護 ........................................................................................................................... 14 外部相間短路的后備保護 ............................................................................................... 14 外部接地短路的后備保護 ............................................................................................... 15 第五章 短路電流計算 ................................................................................................................... 16 短路產(chǎn)生的原因 ............................................................................................................... 17 短路產(chǎn)生的危害 ............................................................................................................... 17 計算短路的目的 ............................................................................................................... 18 短路計算的方法 ............................................................................................................... 18 短路電流計算 ........................................................................................................ 18 平 頂 山 工 業(yè) 職 業(yè) 技 術(shù) 學(xué) 院 畢 業(yè) 設(shè) 計 （ 論 文 ） 第 2 頁 計算短路電流和短路容量 .................................................................................... 20 第六章 變配電所 一次設(shè)備的選擇校驗 ....................................................................................... 20 一次設(shè)備選擇與校驗的條件與項目 .............................................................................. 21 一次設(shè)備選擇與校驗的條件 ............................................................................... 21 一次設(shè) 備選擇與校驗的項目 ............................................................................... 21 繼電保護的整定 .................................................................................................... 22 第七章 防雷保護和接地裝置的設(shè)計 ........................................................................................... 23 配電變壓器防雷接線 ...................................................................................................... 23 接地電阻的數(shù)值 .................................................................................................... 24 共同接地的連接方式 ............................................................................................ 25 接地裝置的設(shè)計經(jīng)驗 .............................................