【正文】 河南理工大學(xué)畢業(yè)（論文）設(shè)計(jì)說(shuō)明書(shū) I 摘 要 煤礦生產(chǎn)的動(dòng)力主要是電力，供電系統(tǒng)是整個(gè)煤礦生產(chǎn)的動(dòng)力來(lái)源。隨著采煤機(jī)械化程度的不斷提高，礦用設(shè)備的功率越來(lái)越大，供電電壓越來(lái)越高，所以供電系統(tǒng)必須具備安全、可靠，靈活的特點(diǎn)，才能適應(yīng)煤礦現(xiàn)代化生產(chǎn)的需要。 變電站是電力系統(tǒng)的重要組成部分，它直接影響整個(gè)電力系統(tǒng)的安全與經(jīng)濟(jì)運(yùn)行，是聯(lián)系發(fā)電廠和用戶(hù)的中間環(huán)節(jié)，起著變換和分配電能的作用。電氣主接線是變電站的主要環(huán)節(jié)，它的擬定直接關(guān)系到全站電氣設(shè)備的選擇，配電裝置的布置、繼電保護(hù)裝置和防雷接地裝置等的確定，是變電站建設(shè)的關(guān)鍵因素。 本設(shè)計(jì)是針對(duì)預(yù)計(jì)生產(chǎn)能力為 90 萬(wàn)噸 /年礦井的 35kV 變電站電氣一次部分的設(shè)計(jì)，根據(jù)礦井的地質(zhì)、各類(lèi)負(fù)荷、采煤方式、年產(chǎn)量等指標(biāo)來(lái)確定變電站設(shè)計(jì)的基本步驟和方法。設(shè)計(jì)中首先根據(jù)已知系統(tǒng)與線路及所有負(fù)荷的參數(shù)先對(duì)負(fù)荷進(jìn)行了分類(lèi)統(tǒng)計(jì)與計(jì)算，選出需要的主變壓器型號(hào)。然后根據(jù)負(fù)荷性質(zhì)及對(duì)供電可靠性要求擬定供電系統(tǒng)，進(jìn)行短路計(jì)算。由最大持續(xù)工作電流及短路計(jì)算的計(jì)算結(jié)果，再根據(jù)電氣設(shè)備選擇原則，對(duì)各種礦用電氣設(shè)備進(jìn)行選擇和校驗(yàn)。最后 ,根據(jù)配電裝置設(shè)計(jì)的原則和要求 ,對(duì)變電站相關(guān)配電裝置進(jìn)行設(shè)計(jì)。 關(guān)鍵詞 ：負(fù)荷計(jì)算； 變壓器選擇； 電氣主接線； 短路電流； 電氣設(shè)備選擇與校驗(yàn)河南理工大學(xué)畢業(yè)（論文）設(shè)計(jì)說(shuō)明書(shū) II Abstract The main driving force coal production is electricity, and the power supply system is the driving force of the coal mine production. With the increasing degree of mechanization coal mining, mining equipment, power increases, increasing the supply voltage, so the power supply system must have secure and reliable features to adapt to mine the needs of modern production. Substation is the important part of the power system, which directly affects the safety and economic operation of the entire power system, contact the power plants and users of intermediate links, plays transformation and distribution of electric energy role. The main electrical wiring is the main part of the substation, its formulation is directly related to the choice of station electrical equipment, the layout of power distribution equipment, protection devices, and lightning protection and grounding devices to determine the key factors of the substation building. The design is expected the first part of the design of the 35kV substation electrical production capacity of 900,000 tons / year mine, mine geology, various types of load, coal mining way, the annual output and other indicators to determine the basic steps and methods of substation design. The design of the first known system with the lines and all load parameters before the load classification Statistics and Computing elect of the main transformer model. The power supply system, and then prepared according to the load of the nature and reliability of power supply requirements for short circuit calculation. By the calculations of the maximum continuous operating current and short circuit calculation, and then choose the principle of electrical equipment, electrical equipment selection and validation of the various mines. Finally, according to the distribution device design principles and requirements of the substation, related to the distribution device design. Keywords: load calculation。 transformer choose。 main electrical wiring。 shortcircuit current。 selection and verification of electrical equipment河南理工大學(xué)畢業(yè)（論文）設(shè)計(jì)說(shuō)明書(shū) III 目 錄 摘 要 ......................................................................................................................................... I Abstract ..................................................................................................................................... II 目 錄 ...................................................................................................................................... III 1 概述 ........................................................................................................................................ 1 本礦概況 ....................................................................................................................... 1 供用電協(xié)議 ................................................................................................................... 1 自然條件 ....................................................................................................................... 1 原始負(fù)荷資料 ............................................................................................................... 1 2 負(fù)荷計(jì)算 ................................................................................................................................ 3 負(fù)荷定義及分類(lèi) .......................................................................................................... 3 負(fù)荷計(jì)算的目的和意義 .............................................................................................. 3 負(fù)荷計(jì)算方法 .............................................................................................................. 3 常用負(fù)荷計(jì)算方法 ............................................................................................ 3 負(fù)荷計(jì)算步驟 .................................................................................................... 4 各用電設(shè)備組負(fù)荷計(jì)算 .................................................................................... 5 各低壓變壓器的選擇與損耗計(jì)算 .................................................................... 7 6kV 母線側(cè)補(bǔ)償前總計(jì)算負(fù)荷 ......................................................................... 9 無(wú)功補(bǔ)償計(jì)算及電容器柜選擇 ........................................................................ 9 補(bǔ)償后 6kV 母線側(cè)總計(jì)算負(fù)荷及功率因數(shù)校驗(yàn) ......................................... 10 3 變電站主變壓器選擇 .......................................................................................................... 11 變壓器的選取原則 .................................................................................................... 11 變壓器選擇計(jì)算 ........................................................................................................ 11 用電負(fù)荷分析 .................................................................................................. 11 主變選擇 .......................................................................................................... 12 變壓器損耗計(jì)算 ........................................................................................................ 12 折算到 35kV 側(cè)負(fù)荷及功率因 數(shù)校驗(yàn) ..................................................................... 12 變壓器經(jīng)濟(jì)運(yùn)行方案的確定 .................................................................................... 13 全礦電耗與