【正文】 is to ensure that the safety system, first of all, the system accurate shortcircuit, and then be the basis of the current shortcircuit current and impact of a series of high and low voltage equipment selection and validation to ensure the normal operation of systems. The fourth part of the design in accordance with the requirements of lightning protection measures for the final selection and ground equipment design, increased system security. In the final papers also include the design drawings and calculation process. Key words： Load calculation, Main wiring design, Shortcircuit calculation, Distribution Device 1 目 錄 1 緒 論 ........................................................................................................................ 1 論文背景及目的 ............................................................................................ 1 論文研究方法 ................................................................................................ 1 供電設計的主要內容 .................................................................................... 1 2 負荷計算與無功功率補償 ...................................................................................... 2 負荷計算 ........................................................................................................ 2 負荷計算的意義 .................................................................................. 2 按需要系數法確定計算負荷 .............................................................. 2 6kV 負荷計算 ...................................................................................... 3 ~ 變電所 380V 負荷計算 .................................................. 3 無功補償計算 ................................................................................................ 4 確定補償容量 ...................................................................................... 4 補償后的功率因素 .............................................................................. 7 3 變壓器選擇與主接線方案的設計 .......................................................................... 8 選擇降壓變壓器 ............................................................................................ 8 35kV/6kV 變壓器的選擇 .................................................................... 8 6kV/380V 變壓器的選擇 .................................................................... 9 工廠主接線方案的比較 .............................................................................. 10 工廠總降壓變電所高壓側主接線方式比較 .................................... 10 工廠總降壓變電所低壓側主接線方式比較 .................................... 10 工廠總降壓變電所 供配電電壓的選擇 ............................................ 11 總降壓變電所電氣主接線設計 .................................................................... 11 高低壓配電柜選擇 ...................................................................................... 11 4 短路電流計算 ........................................................................................................ 13 短路計算的意義 .......................................................................................... 13 短路計算 ...................................................................................................... 13 5 電氣設備選擇 ........................................................................................................ 15 2 電氣設備選擇與校驗的條件與項目 .......................................................... 15 設備選擇 ...................................................................................................... 15 斷路器的選擇 .................................................................................... 15 隔離開關的選擇 ................................................................................ 17 高壓熔斷器選擇 ................................................................................ 18 電壓互感器的選擇 ............................................................................ 19 電流互感器的選擇 ............................................................................ 20 母線與各電壓等級出線選擇 ...................................................................... 23 6kV 母線的選擇 ................................................................................ 23 選擇 35kV 線路 導線 ......................................................................... 25 6kV 出線的選擇 ................................................................................ 26 6 繼電保護選擇與整定 ............................................................................................ 33 35kV 側電壓互感器二次回路方案與繼電保護的整定 ............................ 33 35kV 主變壓器保護 .......................................................................... 33 6kV 變壓器保護 ................................................................................ 36 6kV 母線保護 .................................................................................... 37 6kV 出線保護 .................................................................................... 37 7 防雷保護與接地裝置的設計 ................................................................................ 40 防雷保護設計 .............................................................................................. 40 接地裝置設計 .............................................................................................. 40 結 論 ............................................................................................................................ 42 參 考 文 獻 ................................................................................................................ 43 致 謝 ..............................................................................................錯誤 !未定義書簽。 在目前各種形式的能源中，電能具有如下特點：易于去其它形式的能源相互轉化；輸配電簡單經濟；可以精確控制、調節(jié)和測量。對論文每一步都一定要遵循國家的線性技術標準和設計規(guī)范來設計。 本篇設計論文的 內容有：先 完成一篇外文論文的閱讀和翻譯工作； 按照設計所提供的用電設備資料來計算負荷；通過進行無功補償來提高系統的功率因素；根據負荷等級和計算負荷，選定供電電源、電壓等級和供電方式；根據環(huán)境和計算負荷來選擇 變電所位置、變壓器數量和容量；確定變配電所的最佳主接線的方案；選擇并校驗電氣設備及配電網絡載流導體截面；繼電保護系統設計和參數整定計算；對系統進行防雷設計和接地設計；歸納設計的計算部分編成計算書；繪制供電系統主接線圖。 用電設備組計算負