【正文】 河南理工大學(xué)畢業(yè)（論文）設(shè)計說明書 I 摘 要 煤礦生產(chǎn)的動力主要是電力，供電系統(tǒng)是整個煤礦生產(chǎn)的動力來源。隨著采煤機械化程度的不斷提高，礦用設(shè)備的功率越來越大，供電電壓越來越高，所以供電系統(tǒng)必須具備安全、可靠，靈活的特點，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，它直接影響整個電力系統(tǒng)的安全與經(jīng)濟運行，是聯(lián)系發(fā)電廠和用戶的中間環(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)計是針對預(yù)計生產(chǎn)能力為 90 萬噸 /年礦井的 35kV 變電站電氣一次部分的設(shè)計，根據(jù)礦井的地質(zhì)、各類負荷、采煤方式、年產(chǎn)量等指標來確定變電站設(shè)計的基本步驟和方法。設(shè)計中首先根據(jù)已知系統(tǒng)與線路及所有負荷的參數(shù)先對負荷進行了分類統(tǒng)計與計算，選出需要的主變壓器型號。然后根據(jù)負荷性質(zhì)及對供電可靠性要求擬定供電系統(tǒng)，進行短路計算。由最大持續(xù)工作電流及短路計算的計算結(jié)果，再根據(jù)電氣設(shè)備選擇原則，對各種礦用電氣設(shè)備進行選擇和校驗。最后 ,根據(jù)配電裝置設(shè)計的原則和要求 ,對變電站相關(guān)配電裝置進行設(shè)計。 關(guān)鍵詞 ：負荷計算； 變壓器選擇； 電氣主接線； 短路電流； 電氣設(shè)備選擇與校驗河南理工大學(xué)畢業(yè)（論文）設(shè)計說明書 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)計說明書 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 原始負荷資料 ............................................................................................................... 1 2 負荷計算 ................................................................................................................................ 3 負荷定義及分類 .......................................................................................................... 3 負荷計算的目的和意義 .............................................................................................. 3 負荷計算方法 .............................................................................................................. 3 常用負荷計算方法 ............................................................................................ 3 負荷計算步驟 .................................................................................................... 4 各用電設(shè)備組負荷計算 .................................................................................... 5 各低壓變壓器的選擇與損耗計算 .................................................................... 7 6kV 母線側(cè)補償前總計算負荷 ......................................................................... 9 無功補償計算及電容器柜選擇 ........................................................................ 9 補償后 6kV 母線側(cè)總計算負荷及功率因數(shù)校驗 ......................................... 10 3 變電站主變壓器選擇 .......................................................................................................... 11 變壓器的選取原則 .................................................................................................... 11 變壓器選擇計算 ........................................................................................................ 11 用電負荷分析 .................................................................................................. 11 主變選擇 .......................................................................................................... 12 變壓器損耗計算 ........................................................................................................ 12 折算到 35kV 側(cè)負荷及功率因 數(shù)校驗 ..................................................................... 12 變壓器經(jīng)濟運行方案的確定 .................................................................................... 13 全礦電耗與