【正文】 目錄 1 前言及工程概況 .......................................................................................... 5 前言 ...........................................................................................................................................5 工程概況 ....................................................................................................................................5 設計依據(jù) ...........................................................................................................................5 主要設計原則 ....................................................................................................................6 工程概況 ...........................................................................................................................7 設計水平年 .......................................................................................................................8 設計范圍 ...........................................................................................................................8 2 寧蒗縣概況及國民經(jīng)濟發(fā)展情況 ............................................................. 9 ..................................................................................................................................9 自然狀況 ...........................................................................................................................9 資源及其開發(fā)現(xiàn)狀 ........................................................................................................... 10 旅游資源 .................................................................................................................... 10 礦產資源、森林資源和其它資源 ................................................................................. 11 西川鄉(xiāng)的簡介 ........................................................................................................................... 11 3 寧蒗縣電網(wǎng)概況及負荷預測 ................................................................... 12 電網(wǎng)現(xiàn)狀 .................................................................................................................................. 12 網(wǎng)架結構 .................................................................................................................................. 13 地方電源 .................................................................................................................................. 14 配電網(wǎng)存在的主要問題及分析 ................................................................................................. 16 用電負荷及預測 ........................................................................................................................ 17 35kV電網(wǎng)容載比 ....................................................................................................................... 18 4 35kV 沙林輸變電工程建設的必要性 ................................................... 20 電網(wǎng)發(fā)展的需要 ........................................................................................................................ 20 滿足西川鄉(xiāng)的用電需求 ............................................................................................................. 20 5 35kV 變電站接入方案和建設規(guī)模 ....................................................... 21 寧蒗縣目標電網(wǎng)規(guī)劃 ................................................................................................................. 21 35V沙林變電站接入系統(tǒng)方案 .................................................................................................... 23 35kV沙林變電站建設規(guī)模 ...................................................................................................... 24 35kV沙林變電站建設規(guī)模如下： ..................................................................................... 24 線路建設規(guī)模 .................................................................................................................. 25 6 電氣計算 .................................................................................................... 25 潮流計算 .................................................................................................................................. 25 寧蒗縣 35KV 沙林變電站及線路 3 短路阻抗計算 ........................................................................................................................... 26 無功補償容量 ........................................................................................................................... 27 7 變電站站址的選擇 ..................................................................................... 28 選站經(jīng)過簡介 ........................................................................................................................... 28 建筑及結構 ...................................................................................................................... 33 變電站總平面布置 ............................................................................................................ 33 8 變電站工程設想 ......................................................................................... 34 電氣一次 .................................................................................................................................. 34 變電站電氣主接線 ........................................................................................................... 34 各級電壓中性點接地方式 ................................................................................................ 34 變電站主要電氣設備選型 ................................................................................................. 35 防雷接地 ......................................................................................................................... 36 設備使用環(huán)境條件 ......................................................................................................... 36 電氣二次 .................................................................................................................................. 37 控制系統(tǒng) ..................................................................................