【正文】 .................................................. 1 主要設(shè)備選型 ......................................................................................... 2 所用電及照明 ......................................................................................... 2 設(shè)計(jì)中應(yīng)注意的問題 .......................................................................................... 2 2 負(fù)荷統(tǒng)計(jì)及其計(jì)算 ........................................................................................................ 3 負(fù)荷統(tǒng)計(jì)表 ......................................................................................................... 3 負(fù)荷計(jì)算 ............................................................................................................ 3 變電所各用戶計(jì)算負(fù)荷 ........................................................................... 3 變電所當(dāng)年的負(fù)荷 ................................................................................. 3 3 變壓器容量的選擇與主接線的設(shè)計(jì) ............................................................................. 5 主變?nèi)萘考芭_(tái)數(shù)的選擇 ....................................................................................... 5 主接線形式的確定 ............................................................................................. 5 4 短路計(jì)算 ....................................................................................................................... 6 短路計(jì)算的目的 .................................................................................................. 6 各元件電 抗標(biāo)幺值計(jì)算 ....................................................................................... 6 短路點(diǎn)的確定 ..................................................................................................... 6 最大運(yùn)行方式各短路點(diǎn)電流 ................................................................... 7 最小運(yùn)行方式各短路點(diǎn)電流 ................................................................... 8 5 電氣設(shè)備的選擇與校驗(yàn) ...............................................................................................10 高壓側(cè)電氣設(shè)備的選擇及校驗(yàn) ...........................................................................10 高壓側(cè)母線的選擇及校驗(yàn) ......................................................................10 高壓側(cè)隔離開關(guān)的選擇 .......................................................................... 11 高壓電流互感器的選擇 .......................................................................... 11 高壓側(cè)斷路器的選擇及校驗(yàn) ..................................................................12 (1) 35kV 側(cè)高壓斷路器的最大長(zhǎng)期工作電流計(jì)算如下： ................................12 高壓側(cè)懸式絕緣子的選擇 ......................................................................13 低壓側(cè)電氣設(shè)備的選擇與校驗(yàn) ...........................................................................14 低壓側(cè)母線的選擇及校驗(yàn) ......................................................................14 低壓側(cè)斷路器的選擇及校驗(yàn) ....................................................................15 10kV 側(cè)高壓斷路器的最大長(zhǎng)期工作電流計(jì)算如下： .......................................15 農(nóng)村 35kV 無人值守變電所設(shè)計(jì) IV 低壓側(cè)電流互感器的選擇及校驗(yàn) ...........................................................16 低壓側(cè)支柱絕緣子的選擇 ......................................................................17 低壓側(cè)出線設(shè)備的選擇與校驗(yàn) ...........................................................................18 低壓側(cè)出線的選擇與校驗(yàn) ......................................................................18 低壓側(cè)出線路斷路器的選擇與校驗(yàn) .......................................................19 低壓側(cè)出線路隔離開關(guān)的選擇與校驗(yàn) ....................................................19 低壓出線電流互感器的選擇與校驗(yàn) .......................................................20 電壓互感器的選擇 .................................................................................21 電力電容器的選擇 .................................................................................22 保護(hù)電力電容器的熔斷器的選擇 ...........................................................23 所用變的選擇及其保護(hù)設(shè)備的選擇 ...................................................................23 所用變的選擇 ........................................................................................23 保護(hù)所用變的熔斷器的選擇 ..................................................................24 保護(hù)所用變的隔離開關(guān)的選擇 ...............................................................24 穿墻套管的選擇與校驗(yàn) ..........................................................................24 6 變電所繼電保護(hù)的設(shè)計(jì) ...............................................................................................26 主變壓器的保護(hù) .................................................................................................26 電流速斷保護(hù) ....................................................................................................26 主變的過流保護(hù) .................................................................................................27 低壓側(cè)出線的的保護(hù) .........................................................................................27 7 接地裝置及防雷保護(hù)的設(shè)置 .......................................................................................30 直擊雷的保護(hù) ....................................................................................................30 1．設(shè)計(jì)中應(yīng)該注意的問題 ......................................................................................30 變電所侵入波的保護(hù) .........................................................................................30 接地裝置 ...........................................................................................................31 8 絕緣監(jiān)察裝置 .............................................................................................................33 斷路器的控制及信號(hào)回路 ..................................................................................33 直流操作電源 ....................................................................................................33 9 綜合自動(dòng)化裝置的選擇 ................................................................................................35 LFP900 系列中低壓變電站綜合自動(dòng)化保護(hù)裝置 ..............................................35 概述 .......................................