【正文】 general provision with the protection of generator, transformer, mother line etc. equipments, but power plant with change to give or get an electric shock a design for defending thunder protecting then primarily aiming at lightning rod with lightning arrester. In addition, return in the appropriate position in thesis additional diagram paper (the lord connects the line, plane chart and defend thunder protection etc.) and forms read, prehend with the convenience with applied. Key word: Thermal power plant Electricity design Short circuit calculation Equipments choice Electricity equips 4300MW 發(fā)電廠第二期工程電氣部分初步設計 III 目 錄 摘 要 .............................................................................................................................................. I ABSTRACT ...................................................................................................................................II 目錄 ............................................................................................................................................... III 第一部分 說明書 .................................................................................................................... 1 第 1 章 發(fā)電機和主 變壓器的選擇 .......................................................................................... 1 發(fā)電機的選擇 ................................................................................................................... 1 主變壓器的選擇 ............................................................................................................... 1 主變壓器與發(fā)電機的連接形式 ............................................................................... 1 發(fā)電廠主變壓器容量和臺數的確定 ....................................................................... 1 變壓器型式的選擇 ................................................................................................... 2 第 2 章 電氣主接線的 設計 ...................................................................................................... 4 總則 ................................................................................................................................... 4 大型電廠的電氣主接線 ................................................................................................... 4 第 3 章 廠用電接線 .................................................................................................................. 7 廠用電接線設計原則 ....................................................................................................... 7 廠用電供電電壓等級的確定 ........................................................................................... 7 廠用電源的引接 ............................................................................................................... 7 高壓廠用工作電源的引接 ....................................................................................... 8 低壓廠用工作電源引接 ........................................................................................... 8 備用電源引接方式 ................................................................................................... 8 第 4 章 短路電流的計算 .......................................................................................................... 9 短路電流計算的主要目的 ............................................................................................... 9 短路電流計算一般規(guī)定 ................................................................................................... 9 計算的基本情況 ....................................................................................................... 9 接線方式 ................................................................................................................... 9 計算容量 ................................................................................................................... 9 短路種類 ................................................................................................................... 9 短路計算點 ............................................................................................................. 10 短路計算方法 ......................................................................................................... 10 計算步驟 ......................................................................................................................... 12 第 5 章 電氣設備選擇 ............................................................................................................ 13 電氣設備選擇總則 ......................................................................................................... 13 高壓斷路器的選擇 ......................................................................................................... 14 隔離開關的選擇 ............................................................................................................. 15 電流互感器的選擇 ......................................................................................................... 16 一次回路額定電壓和電流的選擇 ......................................................................... 16 二次額定電流的選擇 ............................................................................................. 16 電流互感器種類和型式的選擇 ............................................................................. 16 電流互感器準確級和額定容量的選擇 ................................................................. 16 沈陽工程學院畢業(yè)設計 IV 熱穩(wěn)定和動穩(wěn)定校驗 ............................................................................................. 16 電壓互感器的選擇 ......................................................................................................... 17 一次回路電壓的選擇 ............................................................................................. 17 二次回路電壓的選擇 ...............................................................................