【正文】 ..................... 5 4 短路計算 ....................................................................................................................... 6 短路計算的目的 .................................................................................................. 6 各元件電 抗標(biāo)幺值計算 ....................................................................................... 6 短路點的確定 ..................................................................................................... 6 最大運行方式各短路點電流 ................................................................... 7 最小運行方式各短路點電流 ................................................................... 8 5 電氣設(shè)備的選擇與校驗 ...............................................................................................10 高壓側(cè)電氣設(shè)備的選擇及校驗 ...........................................................................10 高壓側(cè)母線的選擇及校驗 ......................................................................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 ..................................................................12 (1) 35kV 側(cè)高壓斷路器的最大長期工作電流計算如下： ................................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 ...........................................................................14 低壓側(cè)母線的選擇及校驗 ......................................................................14 低壓側(cè)斷路器的選擇及校驗 ....................................................................15 10kV 側(cè)高壓斷路器的最大長期工作電流計算如下： .......................................15 農(nóng)村 35kV 無人值守變電所設(shè)計 IV 低壓側(cè)電流互感器的選擇及校驗 ...........................................................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 ...........................................................................18 低壓側(cè)出線的選擇與校驗 ......................................................................18 低壓側(cè)出線路斷路器的選擇與校驗 .......................................................19 低壓側(cè)出線路隔離開關(guān)的選擇與校驗 ....................................................19 低壓出線電流互感器的選擇與校驗 .......................................................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 ..........................................................................24 6 變電所繼電保護(hù)的設(shè)計 ...............................................................................................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回路 ..................................................................................33 直流操作電源 ....................................................................................................33 9 綜合自動化裝置的選擇 ................................................................................................35 LFP900 系列中低壓變電站綜合自動化保護(hù)裝置 ..............................................35 概述 .......................................................................................................35 主要特點 ...............................................................................................35 本變電所保護(hù)配置 .................................................................................36 變壓器保護(hù) ...........................................................................................36 主要技術(shù)數(shù)據(jù) ........................................................................................37 微機(jī)控制系統(tǒng)在 35kV 無人值守變電所中的應(yīng)用 ..............................................38 調(diào)度端 ...................................................................................................38 信號通道 ...............................................................................................38 農(nóng)村 35kV 無人值守變電所設(shè)計 V 執(zhí)行端 ..................................................................................................38 10 變電所整體平面設(shè)計 .................................................................................................40 ...................................................................................................................41 ........................................................