【正文】 河南理工大學(xué)畢業(yè)設(shè)計(jì) (論文 )說(shuō)明書 i 摘 要 隨著經(jīng)濟(jì)的發(fā)展和現(xiàn)代工業(yè)建設(shè)的迅速崛起，供電系統(tǒng)的設(shè)計(jì)越來(lái)越全面、系統(tǒng)，工廠用電量迅速增長(zhǎng)，對(duì)電能質(zhì)量、技術(shù)經(jīng)濟(jì)狀況、供電的可靠性指標(biāo)也日益提高，對(duì)供電系統(tǒng)的設(shè)計(jì)有了更高、更完善的要求。而作為接受和分配電能的變電所在工業(yè)企業(yè)中占據(jù)很重要的地位，因此設(shè)計(jì)、分析、發(fā)展變電所是一項(xiàng)很重要的任務(wù)。 本設(shè)計(jì)初步設(shè)計(jì)了煤礦地面 35kV 變電站的設(shè)計(jì)。其設(shè)計(jì)過(guò)程主要包括負(fù)荷計(jì)算、主接線設(shè)計(jì)、短路計(jì)算、電氣設(shè)備選擇、繼電保護(hù)方案、變電所的防雷保護(hù)與接地等。通過(guò)對(duì)煤礦 35kV變電站做負(fù)荷統(tǒng)計(jì)，用需用系數(shù)法進(jìn)行負(fù)荷計(jì)算， 根據(jù)負(fù)荷計(jì)算的結(jié)果確定出該站主變壓器的臺(tái)數(shù)、容量及型號(hào)。用標(biāo)幺值法對(duì)供電系統(tǒng)進(jìn)行了短路電流計(jì)算，為電氣設(shè)備的選擇及校驗(yàn)提供了數(shù)據(jù)。根據(jù)煤礦供電系統(tǒng)的特點(diǎn)，制定了礦井變電所的主結(jié)線方式、運(yùn)行方式、繼電保護(hù)方案。其中 35kV側(cè)為全橋接線， 6kV主接線為單母分段。兩臺(tái)主變壓器采用分列運(yùn)行方式。并根據(jù)電流整定值以及相關(guān)數(shù)據(jù)的校驗(yàn)，選擇了斷路器、隔離開關(guān)、繼電器、變壓器等電氣設(shè)備。 關(guān)鍵字：變電站；負(fù)荷統(tǒng)計(jì)；短路計(jì)算 河南理工大學(xué)畢業(yè)設(shè)計(jì) (論文 )說(shuō)明書 ii ABSTRACT With the development of economy and the rapid rise of modern industrial building, the design of the power supply system more prehensive, systematic, rapid growth in electricity plants, power quality, technical and economic conditions, supply reliability indicators are increasing the power supply system design have higher and better requirements. And as receiving and distributing power substation in industrial enterprises occupy a very important position, so the design, analysis, development substation is a very important paper designed a preliminary mine surface 35kV substation. The design process includes load calculations, the main wiring design, short circuit calculations, electrical equipment selection, protection schemes, substation lightning protection and grounding. By doing mine 35kV substation load statistics, with the required coefficient method for load calculation, based on the results of load calculations determine the number of units of the main transformer station, capacity and models. Pu France with the power supply system for a shortcircuit current calculation for electrical equipment selection and verification of data. According to the characteristics of coalpowered systems, developing the mine substation main connection mode, operation mode, relay protection scheme. Key words： substation； load calculation； shortcircuit current. 河南理工大學(xué)畢業(yè)設(shè)計(jì) (論文 )說(shuō)明書 I 目錄 1 概 述 ................................................................... 1 設(shè)計(jì)依據(jù) .......................................................... 1 ..................................................... 1 ....................................................... 1 2 負(fù)荷計(jì)算 ................................................................ 3 負(fù)荷計(jì)算的目的 .................................................... 3 負(fù)荷計(jì)算方法 ...................................................... 3 負(fù)荷計(jì)算過(guò)程 ...................................................... 4 各用電設(shè)備組負(fù)荷計(jì)算 ......................................... 4 ................................. 6 6kV母線上補(bǔ)償前的總負(fù)荷并初選變壓器 ........................... 7 ................................... 8 ................................... 9 3電氣主接線設(shè)計(jì) ......................................................... 11 對(duì)主接線的基本要求 ............................................... 11 本所電氣主接線方案的確定 ......................................... 11 確定礦井 35kV進(jìn)線回路 ....................................... 11 35kV、 6kV 主接線的確定 ...................................... 11 .......................................... 12 4 短路電流計(jì)算 ........................................................... 14 短路電流計(jì)算的目的 ............................................... 14 .................................................. 14 .............................. 14 ............................................ 16 ...................................... 17 5 高壓電氣設(shè)備的選擇 ..................................................... 20 高壓電氣設(shè)備選擇原則 ............................................. 20 高壓開關(guān)設(shè)備的選擇及校驗(yàn) ......................................... 20 高壓斷路器的選擇及校驗(yàn) ...................................... 20 隔離開關(guān)的選擇 .............................................. 23 河南理工大學(xué)畢業(yè)設(shè)計(jì) (論文 )說(shuō)明書 II ............................................ 24 ............................................ 25 ................................................ 26 支柱絕緣子和套管絕緣子的選擇 ................................ 26 開關(guān)柜的選擇 ................................................ 27 電力線路的選擇 ................................................... 28 35kV電源架空線路選擇 ....................................... 28 6kV母線的選擇 .............................................. 29 主提升機(jī) 6kV電纜線路選擇 .................................... 30 6kV下井電纜選擇 ............................................ 31 6kV架空線路的選擇 .......................................... 33 變電所各斷路器過(guò)流保護(hù)的設(shè)置與配合 ............................... 36 QF QF QF3斷路器保護(hù)的設(shè)置與配合 .......................... 36 QF QF5斷路器上保護(hù)的設(shè)置與配合 ............................ 36 各６ kV低壓饋出線斷路器的設(shè)置與配合 ......................... 36 6kV聯(lián)絡(luò)開關(guān) QF8的保護(hù)設(shè)置與配合 ............................. 37 各斷路器的過(guò)流保護(hù)整定 ........................................... 37 QF QF QF3過(guò)流保護(hù)整定 .................................... 37 QF QF5的過(guò)流保護(hù)整定 ...................................... 38 6kV饋出線的過(guò)流保護(hù)整定 .................................. 39 QF8過(guò)流保護(hù)整定 ............................................. 40 7 變電所的防雷與接地 ..................................................... 42 變配電所的防雷設(shè)計(jì) ............................................... 42 接地裝置的設(shè)計(jì)及計(jì)算 ............................................. 43 8 變電所的平面布置 ....................................................... 44 變電所位置選擇 ................................................... 44 配電室建筑要求 ................................................... 44 控制室布置 ....................................................... 45 結(jié)論 ..................................................................... 47 致謝 ..................................................................... 48 參考文獻(xiàn) ................................................................. 49 河南理工大學(xué)畢業(yè)設(shè)計(jì) (論文 )說(shuō)明書 III 附錄 ..................................................................... 50 附圖 1 35kV礦用變電所主接線圖 .................