【正文】 .....................................................................................................V 目 錄 .............................................................................................................................................. VI 1 緒 論 ......................................................................................................................................... 1 ................................................................................................................................. 1 ................................................................................................................................. 1 ....................................................................................................................... 1 .......................................................................................................................... 1 ................................................................................................................... 1 .......................................................................................................................... 2 ................................................................................................................................. 2 2 電氣主接線的選擇 ...................................................................................................................... 3 ................................................................................................................................. 3 主接線設(shè)計(jì)的基本要求及原則 .......................................................................................... 3 變電所主接線設(shè)計(jì)原則 ..................................................................................................... 3 .................................................................................................. 4 .................................................................................................. 4 .......................................................................................................................... 4 110kV側(cè)主接線方案 ....................................................................................................... 4 35kV側(cè)主接線方案 ........................................................................................................... 6 10kV側(cè)主接線方案 ........................................................................................................... 7 最優(yōu)方案的確定 ............................................................................................................... 8 3 主變壓器的選擇 ........................................................................................................................... 9 變電所主變壓器臺(tái)數(shù)的確定 ..................................................................................................... 9 主變臺(tái)數(shù)確定的要求： ..................................................................................................... 9 變電所主變壓器容量的確定 .............................................................................................. 9 變電所主變壓器型式的選擇 .............................................................................................. 9 站用變臺(tái)數(shù)、容量和型式的確定 .............................................................................................. 9 ............................................................................................................ 9 站 用變?nèi)萘康拇_定 .......................................................................................................... 10 站用變型式的選擇 .......................................................................................................... 10 4 短路電流計(jì)算 ................................................................................................................................11 短路電流計(jì)算的目的及假設(shè) ....................................................................................................11 ....................................................................................................... 11 ................................................................................................ 11 ................................................................................................ 11 短路電流計(jì)算的步驟 ..............................................................................................................11 短路電流的計(jì)算 .................................................................................................................... 13 基準(zhǔn)值選取 SB=100MVA,UB為各側(cè)的平均額定電壓 ............................................................ 13 某市 110kV 中心變電所電氣一次部分初步設(shè)計(jì) VII 短路點(diǎn)的確定及其計(jì)算 ................................................................................................... 14 繪制短路電流計(jì)算結(jié)果： ............................................................................................... 17 5 電氣設(shè)備的選擇 ....................................................................................................................... 18 ....................................................................................................... 18 ......................................................................................... 18 ......................................................................................... 18 按短路情況校驗(yàn) ............................................................................................................. 19 高壓電氣設(shè)備 ........................................................................................................................ 20 斷路器選擇與檢驗(yàn) .......................................................................................................... 21 隔離開(kāi)關(guān)的選擇與校驗(yàn) ................................................................................................... 23 電流互感器選擇與檢驗(yàn) ..............................................