【文章內容簡介】 ata .................................................................................. 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 年產為 180 萬噸煤礦地面變電所設計 VIII 60 kV equipment selection .............................................................................. 29 60 kV disconnecting switch selection ....................................................... 29 60 kV oil circuit breaker selection ............................................................ 30 Requires transformer and selection ........................................................... 31 Substation busbar installation options....................................................... 32 6 kV electrical equipment choice .................................................................... 34 6 kV line into the cabi ....................................................................... 34 6 kV contact tank.................................................................................... 37 6 kV voltage transformer cabi choices .............................................. 38 6 kV distribution out of choice............................................................... 39 Compensation capacitor in the selection of control cabi...................... 39 Substation electricity cabi choices ....................................................... 39 6 kVbusbar selection ................................................................................. 40 6 kV distribution line choice ..................................................................... 41 Highvoltage through walls ....................................................................... 42 Busbar selection of post insulator.................................................................... 42 Pillar insulator option .............................................................................. 42 Indoor post insulator choice ...................................................................... 42 60 kv and 6 kv transmission line selection and installation ............................ 43 Conductor material choice ........................................................................ 43 Insulator choice ......................................................................................... 43 The choice of hardware ............................................................................. 43 The choice of the pole ............................................................................. 43 Overhead line laying ................................................................................. 43 Chapter 6 The relay protection planning and design ........................................ 44 Overview of relay protection ........................................................................... 44 Main transformer protection and setting ......................................................... 44 The substation protection for main transformer used as follows .............. 44 The connection mode of the main transformer protection ........................ 44 Protection device of choice ....................................................................... 44 Main transformer protection setting calculation ....................................... 45 60 kV line protection is calculated ............................................................... 48 60 kV line protect