【正文】 10kV 變電所供配電工程設(shè)計(jì) 摘 要 變電所是電力系統(tǒng)的一個(gè)重要組成部分，由電器設(shè)備和線路按一定的接線方式所構(gòu)成，他從電力系統(tǒng)取得電能，通過其變換、分配、輸送與保護(hù)等功能，然后將電能安全、可靠、經(jīng)濟(jì)的輸送到每一個(gè)用電設(shè)備的轉(zhuǎn)設(shè)場(chǎng)所 。變電所供配電設(shè)計(jì)需要考慮很多方面，分析變電所擔(dān)負(fù)的任務(wù)及用戶負(fù)荷等情況 .利用用戶數(shù)據(jù)進(jìn)行負(fù)荷計(jì)算，確定用戶無功功率補(bǔ)償裝置。同時(shí)進(jìn)行各種變壓器的選擇，從而確定變電所的主接線方式，再進(jìn)行短路電流計(jì)算，選擇導(dǎo)線，選擇變電所高低壓電氣一次設(shè)備 等 。本變電所的設(shè)計(jì)包括了：總體方案 的確定 ， 負(fù)荷分析 ， 短路電流的計(jì)算 ， 主接線方案的選擇 ， 繼電保護(hù)的選擇與整定 和 防雷設(shè)計(jì) 。 關(guān)鍵詞 ： 變電所，負(fù)荷， 短路電流 ， 防雷設(shè)計(jì) Abstract The substation is an importance part of the electric power system, it is consisted of the electric appliances equipments and circuitry. It obtains the electric power from the electric power system, through its function of transformation and assign, transport and safety. Then transport the power to every place with safe. The design of substation supplypower distribution should consider many change to give or get an electric shock a mission for carrying and customers carries etc. make good use of customer data proceed then carry calculation, ascertain the correct equipment of the customer. At the same time following the choice of every kind of transformer, then make sure the line method of the substation, then calculate the shortcircuit electric current, choosing the style of the wire and once equipment of electric appliances and so on. This first step of design included:(1) ascertain the total project (2) load analysis(3) the calculation of the shortcircuit electric current (4) the choice of line project (5) the choice and the settle of the protective facility (6) The design of prevent mine Key words： Substation， Load， Shortcircuit electric current， The design of prevent mine 目 錄 1 緒 論 ....................................................................................................................... 1 工廠變配電所的設(shè)計(jì) ..................................................................................... 1 電力用戶供電系統(tǒng)的分類 .................................................................. 1 工廠變配電所的設(shè)計(jì)原則 .................................................................. 1 課題來源 .............................................................................................. 2 設(shè)計(jì)背景 .............................................................................................. 2 2．變電所負(fù)荷計(jì)算和無功補(bǔ)償?shù)挠?jì)算 ..................................................................... 3 計(jì)算負(fù)荷的方法及負(fù)荷計(jì)算法的確定 ...................................................... 3 需要系數(shù)法的基本知識(shí) .............................................................................. 3 變電所的負(fù)荷計(jì)算 ........................................................................................ 5 負(fù)荷統(tǒng)計(jì) .............................................................................................. 5 負(fù)荷計(jì)算 ............................................................................................. 5 無功補(bǔ)償?shù)哪康暮头桨? ................................................................................. 8 無功補(bǔ)償?shù)挠?jì)算及電容器的選擇 ................................................................ 8 3 變電所變壓器臺(tái)數(shù)和容量的選擇 ....................................................................... 11 變壓器的選擇原則 ....................................................................................... 11 變壓器類型的選擇 ....................................................................................... 11 變壓器臺(tái)數(shù)的選擇 ....................................................................................... 11 變壓器容量的選擇 ....................................................................................... 12 4 電氣主接線方案的設(shè)計(jì) ....................................................................................... 13 主接線的基本要求 ....................................................................................... 13 主接線的基本形式與分析 ........................................................................... 13 變電所主接線方案的選擇 .......................................................................... 15 5 短路電流的計(jì)算 ................................................................................................... 18 產(chǎn)生短路電流的原因、危害及計(jì)算方法 ................................................... 18 高壓電網(wǎng)三相短路計(jì)算 ............................................................................... 18 6 變電所高壓進(jìn)線、一次設(shè)備和低壓線路的選擇與效驗(yàn) ..................................... 22 高壓側(cè)的負(fù)荷計(jì)算 ....................................................................................... 22 ................................................................... 22 .高壓側(cè)的負(fù)荷計(jì)算 ......................................................................... 22 變電所高壓進(jìn)線的選擇與校驗(yàn) ................................................................... 23 架空線的選擇 .................................................................................... 23 電纜進(jìn)線的選擇 ................................................................................ 23 高壓一次設(shè)備的選擇 ................................................................................... 23 高壓斷路器的選擇與效驗(yàn) ................................................................ 24 高壓隔離開關(guān)的選擇與效驗(yàn) ............................................................ 26 高壓 熔斷器的選擇與效驗(yàn) ................................................................ 27 電流互感器的選擇與效驗(yàn) ................................................................ 28 電壓互感器的選擇 ............................................................................ 29 接地開關(guān)的選擇與效 驗(yàn) .................................................................... 30 高壓側(cè)母線的效驗(yàn) ............................................................................ 30 絕緣子的效驗(yàn) ................................................................................... 31 低壓線路導(dǎo)線的選擇 .................................................................................. 33 7 變電所二次回路方案選擇及繼電保護(hù)的整定 ..................................................... 38 二次回路的定義和分類 ............................................................................... 38 二次回路操作電源的選擇 ............