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110kv變電站初步設(shè)計(畢業(yè)設(shè)計)畢業(yè)論文(存儲版)

2025-07-28 06:55上一頁面

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【正文】 ransformer always electrical energy loss accounts for the power rate about 10%. This said to the nation that, meant the whole year transformer always electrical energy loss is above 110 billion kWh, is equal economizes sum of the electric quantity in 3 medium electricity consumptions.Our country transformer loss electrical energy is so big, is because in our country39。s pine and cypress, pays the well, in the range first three townships transformer substation all has two obsolete transformers, moves spare, each transformer substation only renews a transformer to put the operation. Another spare transformer does not renew. Whole year total festival electric quantity 580,000 kW □h. Meanwhile pared to renews the transformer to save the fund nearly million Yuan pletely, and reduced the capacity to paste spends 80 ten thousand Yuan.(3) new transformers shapings want to be superior elect superiorlyCurrent our country promotes highly effective transformer main right and wrong crystalline state and S9, therefore, the obsolete transformer renews the putation is by the energy conservation crystalless condition and the S9 transformer replaces the obsolete transformer。由于變壓器臺數(shù)多,總?cè)萘看?,所以在廣義電力系統(tǒng)(包括發(fā)、供、用電)運行中,變壓器總的電能損失占發(fā)電量的10%左右。變壓器更新?lián)Q代的科學(xué)決策在新世紀,在城鄉(xiāng)電網(wǎng)改造中,我們要運用知識經(jīng)濟和科學(xué)技術(shù),加速老舊變壓器的更新?lián)Q代。加速老舊變壓器更新?lián)Q代,這是低投入高產(chǎn)出的經(jīng)濟決策。h。另一臺備用變壓器不更新。h,總經(jīng)濟效益為13~28萬元,所以,加速老舊變壓器更新?lián)Q代,購置S9型變壓器是企業(yè)減虧增效之路。據(jù)統(tǒng)計,購S9型變壓器雖然比購S7型變壓器多花投資1萬元左右。但但注意要把老舊變壓器中的劣中之優(yōu)留下做備用和特殊貯備。但通過定量的優(yōu)化計算,更新1號變壓器全年節(jié)電64萬kW(3)加速老舊變壓器更新?lián)Q代是經(jīng)濟效益不好的企業(yè)的重要舉措之一。使我國電網(wǎng)結(jié)構(gòu)中科技含量遠遠落后于發(fā)達國家??傊斐晌覈娋W(wǎng)損耗大的主要原因是,我國城鄉(xiāng)電網(wǎng)結(jié)構(gòu)和企業(yè)電網(wǎng)結(jié)構(gòu)中及電網(wǎng)運行管理中科技含量太低。 investment can very quickly take back.(1) obsolete transformers renew want to be poor select poorlyIn the current many enterprises has the multi Taiwan obsolete transformer, although accelerates the obsolete transformer renewal to be able to bring the considerable economic efficiency for the enterprise. But because obsolete transformer quantity big, is impossible in a year to renew pletely all obsolete transformers, renews inevitably year by year, therefore, wants in the multi Taiwan obsolete transformer elimination to be poor selects poorly, through the quantitative evaluation loses the biggest obsolete transformer, namely elimination technology characteristic poor. Namely obtains the biggest electricity saving effect with the same investment fund. For example: The Dalian chemical plant has 2 6039。 參考文獻 [1]范錫普主編 發(fā)電廠電氣部分(第二版) 水利電力出版社 1995[2]西北電力設(shè)計院 電力工程電氣一次設(shè)計手冊 水利電力出版社 1989[3]西北電力設(shè)計院 電力工程電氣二次設(shè)計手冊 水利電力出版社 1989[4]陳珩主編 電力系統(tǒng)穩(wěn)態(tài)分析 中國電力出版社 1998[5]李光琦主編 電力系統(tǒng)暫態(tài)分析 中國電力出版社 2002[6]賀家李 宋從矩 合編 電力系統(tǒng)繼電保護 中國電力出版社 2003英文翻譯原文Accelerates the middle and small scale obsolete transformer renewal festival pressure decrease to consume According to pertinent data estimate: From generates electricity to the power supply, to in the process generalized electrical power system each kind of electrical equipment which uses electricity (including generator, transformer, power circuit, electric motor and so on) the plete electrical energy consumption approximately poses continuously the power rate 28% ~ 33%. This to the nation said a year has 3,178 ~ billion kWh the electrical energy to lose in the movement electrical equipment, is equal in the 10 medium electricity consumptions provinces sum of electricity consumption. This indicated the electricity saving potential is extremely big, but also explained our country mesh wire damages leads excessively high, is in the world country of the output value energy consumption backwardness.Our country electrical network line damaging rate reaches as high as %, but Germany is only %, backwardness because is: One is our country electrical network structure backward, wire table weak, like in electrical network middle and small scale obsolete high energy consumption transformer capacity too big, lacks the adjustment ability, creates the accident rate high, line damaging rate is high。 在主變的變壓器裝避雷器,防止主變的高壓側(cè)出現(xiàn)過電壓。避雷針采用φ20mm的鍍鋅圓鋼,長1~。 額定電壓 避雷器的額定電壓應(yīng)與系統(tǒng)額定電壓一致。如不能包括引出線時,應(yīng)采取快速切除故障的輔助措施。依據(jù):《電力裝置的繼電保護和自動裝飾設(shè)計規(guī)范》;應(yīng)裝設(shè)響應(yīng)的保護裝置。(3) 應(yīng)裝設(shè)作為變壓器外部相間短路和內(nèi)部短路的后備保護的過電壓保護。35kV及以下中性點非直接接地電網(wǎng)中線路保護配置1 相間短路的電流、電壓的配置根據(jù)有關(guān)規(guī)程,相間短路保護應(yīng)按下列原則配置:1)、保護的電流回路的電流互感器采用不完全星形接地,各線路保護用電流互感器均裝設(shè)在A、C兩相上,以保證在大多數(shù)兩點接地情況下只切除一個接地故障點。(2) 由逆變電流裝置單獨供電的方式。母線裝設(shè)在配電裝置上部,三相母線水平布置,兩段母線用垂直隔板隔開。母線裝設(shè)在配電裝置上部,三相母線水平布置,兩段母線用垂直隔板隔開。軌距為。它的作用是接受和分配電能。按短路關(guān)合電流選擇,應(yīng)滿足斷路器額定關(guān)合電流不小于短路沖擊電流ieg≥ich 一般等于電動穩(wěn)定電流。(5)短路計算點:在正常接地方式時,通過電氣設(shè)備的短路電流為最大的點成為短路計算點。其計算的目的主要有以下幾個方面:(1)在選擇電氣主接線時,為了比較各種接線方案,或確定某一接線是否需要采取限制短路電流的措施等,均需要進行必要的短路電流計算;(2)在選擇電氣設(shè)備時,為了保證設(shè)備在正常運行和故障情況下都能安全可靠的工作,同時又力求節(jié)約資金,這就需要進行全面的短路電流計算。出線回路數(shù)較多,斷路器故障或檢修較多,母聯(lián)斷路器長期被占用,對變電站不利?!?角形接線多角形接線的各斷路器互相連接而成閉合的環(huán)形,是單環(huán)形接線。當線路故障或檢修時,變壓器停運;變壓器故障或檢修時,線路停運。在雙母線接線方式的基礎(chǔ)上增加一條旁路母線的接線方式不僅具有雙母線的所有優(yōu)點,而且可以避免雙母線檢修斷路器時必須進行短時停電的缺點,充分保證供電的可靠性。不僅便于分段檢修母線,而且可以減少母線故障影響范圍。,在不影響連續(xù)供電或停電時間最短的情況下,投入新裝機組變壓器或線路而不互相干擾,并且對一次和二次部分改建的工作量最少。設(shè)計主接線時,還應(yīng)考慮檢修母線或斷路器時是否允許線路故障、變壓器或發(fā)電機停運。近年來隨著變壓器制造技術(shù)發(fā)展,在大容量變壓器中,采用了強迫油循環(huán)導(dǎo)向冷卻方式,它是用潛油泵將冷油壓入線圈之間和鐵芯的油道中,故此冷卻方式效率更高。我國110kV及以上電壓,變壓器繞組都采用Y0連接;35kV亦采用Y連接,其中性點多經(jīng)過消弧線圈接地。已知系統(tǒng)情況為系統(tǒng)通過雙回110kV架空線路向待設(shè)計變電所供電,且在該待設(shè)計變電所的負荷中,同時存在有一、二級負荷,故在設(shè)計中選擇兩臺主變壓器。10KV電壓級,電纜出線3回,輸送距離4km,每回輸送功率3MW;架空輸電線4回,輸送距離7km,每回輸送功率4MW。在防雷上采用通用的防雷設(shè)計方法。電能生產(chǎn)的特點是發(fā)電、變電、輸電和用電是在同一時刻完成的,具有同時性。!摘要由于某地區(qū)電力系統(tǒng)的發(fā)展和負荷增長,擬建一座110KV變電站,向該地區(qū)用35KV和10KV兩個電壓等級供電。 在設(shè)計中,有設(shè)計任務(wù)書、設(shè)計說明書、設(shè)計計算書、 繪圖以及相關(guān)文獻翻譯等。10kV電壓等級下共有出線7回,其中一級負荷為4回,分別為鎮(zhèn)區(qū)變、機械廠、紡織廠耐火材料廠。對于有重要負荷的變電所,應(yīng)考慮當一臺主變壓器停運時,其余變壓器容量在計及過負荷能力后的允許時間內(nèi),應(yīng)保證用戶的一級和二級負荷。根據(jù)該待設(shè)計變電所負荷分析確定:采用兩臺主變壓器。規(guī)矩(mm)變壓器型號中字母代表的含義:S在第一位表示三相,在第三、第四則表示三繞組F代表油浸風(fēng)冷 Z代表有載調(diào)壓J代表油浸自冷L代表鋁繞組或防雷P代表強迫油循環(huán)風(fēng)冷D代表自耦,在第一位表示降壓,在末位表示升壓X代表消弧線圈
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