【正文】 ........... 54 保護(hù)裝置的整定計(jì)算 ............................................................................ 54 第 7 章 防雷保護(hù)與安全接地規(guī)劃設(shè)計(jì) ................................. 56 過(guò)電壓的原因及危害 .................................................................................... 56 防直擊雷的保護(hù) ........................................................................................... 56 防直擊雷的措施 .................................................................................... 56 避雷針的高度及位置的確定 ................................................................ 57 作避雷針保護(hù)范圍平面圖 .................................................................... 58 內(nèi)過(guò)電壓的抑制 .................................................................................... 58 對(duì) 60kV 進(jìn)線段的保護(hù) .......................................................................... 58 對(duì)雷電入侵波 的防護(hù) ................................................................................... 58 接地措施 ....................................................................................................... 59 保護(hù)接地 ................................................................................................. 59 接地裝置的敷設(shè) .................................................................................... 60 接地電阻的計(jì)算 .................................................................................... 60 避雷針的設(shè)計(jì) ................................................................................................ 61 第 8章 變電所室內(nèi)外配電裝置的設(shè)計(jì) .................................................................. 62 室內(nèi)外概況 .................................................................................................... 62 室內(nèi)布置 ........................................................................................................ 63 年產(chǎn)為 180 萬(wàn)噸煤礦地面變電所設(shè)計(jì) VI 結(jié) 論 ........................................................................................................................ 64 致 謝 ........................................................................................................................ 65 參考文獻(xiàn) .................................................................................................................... 66 年產(chǎn)為 180 萬(wàn)噸煤礦地面變電所設(shè)計(jì) VII Directory Abstract（ chinese） ................................................................................................ Ⅰ Abstract ..................................................................................................................... Ⅱ Chapter 1 Intertuction ............................................................................................... 1 The significance of topic selection…………………………………………… 1 Development situation at home and abroad ...................................................... 2 Analysis the original data .................................................................................. 3 Design subject and raw materials ................................................................ 3 The design guiding ideology ....................................................................... 4 Design content ............................................................................................. 4 Chapter 2 The selection of main transformer load statistics............................... 7 Source load ........................................................................................................ 7 The load statistics and load calculation ............................................................. 7 Demand factor method to calculate the load ............................................... 7 Safety load and statistics of production load............................................... 8 The ground substation capacity calculation ................................................ 8 The choice of the main transformer................................................................. 12 Reactive power pensation................................................................... 12 The choice of the main transformer .......................................................... 15 Transformer economic operation problem ................................................ 16 Chapter 3 Ground power supply system design .................................................... 18 Substation location choice ............................................................................... 18 Substation location choice conditions ....................................................... 18 Determination of substation power supply connection ................................... 18 Substation main connection and with wire connection ............................. 18 Chapter 4 The calculation of shortcircuit current ............................................... 20 The purpose of calculation of short circuit current and tasks.......................... 20 Short circuit point selection............................................................................. 20 The calculation of shortcircuit current ........................................................... 22 Short circuit calculation results ....................................................................... 27 Chapter 5 substation high voltage electrical equipment selection ....................... 28 Above............................................................................................................... 28 年產(chǎn)為 180 萬(wàn)噸煤礦地面變電所設(shè)計(jì) VIII 60 kV equipment selection .............................................................................. 29 60 kV disconnecting switch selection ....................................................... 29 60 kV oil circuit