【正文】 () （ 5）待建變電站供電總?cè)萘浚? S∑ =Sg10+Sg所 =+＝ (MVA) () P∑ =P10+P所 =+＝ (MW) () 臺(tái)數(shù)和容量的選擇 （ 1）主變壓器的臺(tái)數(shù)和容量，應(yīng)根據(jù)地區(qū)供電條件、負(fù)荷性質(zhì)、用電容量和運(yùn)行方式等綜合考慮確定。所以負(fù)荷計(jì)算是一個(gè)全面地分析計(jì)算過(guò)程，只有負(fù)荷分析正確無(wú)誤，我們的變電站設(shè)計(jì)才有成功的希望。 負(fù)荷分析的目的 負(fù)荷計(jì)算是供電設(shè)計(jì)計(jì)算的基本依據(jù) 和方法 ，計(jì)算負(fù)荷確定得是否正確 無(wú)誤 ，直接影響到電器和 導(dǎo) 線(xiàn)電纜的選擇是否經(jīng)濟(jì)合理。為了徹底解決農(nóng)網(wǎng)落后的情況，待建變電站的設(shè)計(jì)盡可能的超前。 水文 氣象 年最低氣溫為 15度，最高氣溫為 37度，月最高平均氣溫為 25 度，年平均氣溫為 15 度，降水量為 2020 毫米，炎熱潮濕。 電壓等級(jí) 變電站的電壓等級(jí)分別為 110kV、 10kV。 關(guān)鍵詞： 110kv 變電站；電氣設(shè)備；主接線(xiàn)；短路電流 3 Design Title: 110kv substation design Abstract Substation is an important part of the power system , the electrical equipment and distribution work at a certain wiring posed , he obtained power from the power system , through its transformation , distribution, transportation and protection functions , which directly affects the entire power system security and economic operation of the electrical energy is then safe, reliable, economical transportation to the place of each electrical equipment. 110KV highvoltage substation belonging to the work , the main electrical wiring is a major part of the power plant substation , the main electrical wiring direct relationship with the choice of the whole plant electrical equipment , electrical substation is the decisive factor in the size of the part of the investment . First , according to the main wiring economic , reliable, flexible operation requirements select each voltage level wiring to choose. According to choose the right main transformer capacity transformers, main transformer station number , size and form of choice is very important, big economic impact on power plants and substations technology. Preliminary design of the substation including : raw data analysis to . main electrical wiring choices .5. calculation of shortcircuit . Electrical Equipment and parity . configuration choices .8. lightning protection and so on. With high technology power technology , the rapid development of plex power system in all areas from power generation to power by using new technologies are constantly changing. Substation as a power system is also a key aspect in the field of new technologies has been fully developed. Key words： 110kv substation。 的選擇。 首先，根據(jù)主接線(xiàn)的經(jīng)濟(jì)可靠、運(yùn)行靈活的要求選擇各個(gè)電壓等級(jí)的接線(xiàn)方式來(lái)選擇。 110KV 變電站屬于高壓網(wǎng)絡(luò)，電氣主接線(xiàn)是發(fā)電廠(chǎng)變電所的主要環(huán)節(jié)，電氣主接 線(xiàn)直關(guān)系著全廠(chǎng)電氣設(shè)備的選擇、是變電站電氣部分投資大小的決定性因素。 。 。變電所作為電力系統(tǒng)中一個(gè)關(guān)鍵的環(huán)節(jié)也同樣在新技術(shù)領(lǐng)域得到了充分的發(fā)展。 shortcircuit current 4 目 錄 ..................................................... 6 原始資料 ......................................................................................................... 6 電壓等級(jí) ......................................................................................................... 6 待建變電站負(fù)荷數(shù)據(jù) (表 )： ................................................................. 6 地形 地質(zhì) ................................................. 7 水文 氣象 ..................................................................................................... 7 環(huán)境 ................................................................................................................. 7 原始資料分析 ................................................................................................. 7 ......................................... 8 負(fù)荷分析的目的 ............................................................................................ 8 待建變電站負(fù)荷計(jì)算 ......................................... 8 10kV 側(cè) ............................................... 8 ...................................... 9 臺(tái)數(shù)和容量的選擇 ............................................ 9 主變壓器的容量的選擇 ........................................ 9 主變壓器型式的選擇 ......................................... 10 相數(shù)的選擇： ......................................... 10 繞組的 確定： ......................................... 10 繞組接線(xiàn)方式的選擇： ................................. 10 普通型和自耦型的選擇 ................................. 10 中性點(diǎn)的接地方式 .................................... 11 ................................... 11 5 電氣主接線(xiàn) ................................................. 11 電氣主接線(xiàn)的設(shè)計(jì)原則 ....................................... 12 主接線(xiàn)設(shè)計(jì)的基本要求 ....................................... 12 主接線(xiàn)方案的比較和確定 ........................................................................... 14 110kV 側(cè)主接線(xiàn)設(shè)計(jì) ................................... 14 10kV 側(cè)主接線(xiàn)設(shè)計(jì) .................................... 16 ................................... 17 原始資料 ................................................... 17 短路計(jì)算 .................................................. 18 短路計(jì)算過(guò)程 ......................................... 18 各短路點(diǎn)電流短路電流計(jì)算 ............................. 19 短路電流計(jì)算結(jié)果表 ................................... 22 .................................................. 23 電氣設(shè)備選擇的一般原則為： ................................. 23 電氣設(shè)備選擇的一般條件 ..................................... 23 技術(shù)條件 ............................................ 24 環(huán)境條件 ............................................ 25 設(shè)備的選擇 ................................................................................................... 25 斷路器的選擇 ........................................ 25 隔離開(kāi)關(guān)的選 擇 ....................................... 29 導(dǎo)線(xiàn)的選擇 ........................................... 32 互感器的選擇 ........................................ 34 避雷器的選擇 ......................................... 35 高壓配電裝置的選擇 .................................. 36 7 繼電保護(hù)的配置 .................................... 37 繼電保護(hù)基本知識(shí) ........................................... 37 110kv 側(cè)進(jìn)出線(xiàn)及母線(xiàn)的繼電保護(hù) ............................. 37 6 10kV 側(cè)出線(xiàn)的繼電保護(hù) ...................................... 39 變壓器的繼電保護(hù) .........................................