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220kv變電站畢業(yè)設(shè)計-全文預(yù)覽

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【正文】 要負(fù)荷百分?jǐn)?shù)和同時率各有不同,必須各個計算。 表 12 10kV用戶負(fù)荷統(tǒng)計資料 河南理工大學(xué)萬方科技學(xué)院本科畢業(yè)論文 3 序號 用戶名稱 最大負(fù)荷( kW) cosΦ 回路數(shù) 重要負(fù)荷百分?jǐn)?shù)(%) 1 礦機(jī)廠 ( D) 1800 0. 85 2 50 2 機(jī)械廠 ( E) 1100 2 45 3 汽車廠 ( F) 2100 2 72 4 電機(jī)廠 ( G) 2200 2 36 5 煉油廠 ( H) 1600 2 76 6 飼料廠 ( I) 400 1 最大負(fù)荷利用小時數(shù) Tmax=5256h,同時率取 ,線路損耗取 6%。 ( 4) 該變電所的所址,地勢平坦,交通方便。發(fā)達(dá)國家通過改善優(yōu)化變電站結(jié)構(gòu),降低變電站的功率損耗,盡可能地提高變電站的可靠性,盡可能地使變電站的靈活性提高,盡可能地提高經(jīng)濟(jì)性。河南理工大學(xué)萬方科技學(xué)院本科畢業(yè)論文 2 結(jié)合我國電力現(xiàn)狀,為國民經(jīng)濟(jì)各部門和人民生活供給充足、可靠、優(yōu)質(zhì)、廉價的電能 。同時對能源、發(fā)電、變電和輸電的電氣部分有個詳細(xì)的概念,能熟練的運(yùn)用有些知識,如短路計算,主接線的設(shè)計、導(dǎo)體電氣設(shè)備的選擇等。設(shè)計是否合理,不僅直接影響基建投資、運(yùn)行費用和有色金屬的消耗量,也會反映在供電的可靠性和安全生產(chǎn)方面,它和企業(yè)的經(jīng)濟(jì)效益、設(shè)備人身安全密切相關(guān)。 relay and transformer configuration。 關(guān)鍵詞: 負(fù)荷計算 ; 主接線 ; 短路電流 計算 河南理工大學(xué)萬方科技學(xué)院本科畢業(yè)論文 II Abstract With the economic development and modern industrial building of the rapid rise of the design of the power supply system more and more prehensive, systematic, and rapid growth of electricity consumption in factories, on the power quality, technical and economic conditions, indicators of the reliability of electricity supply improves, so design of power supply has been higher and more prehensive requirements. The design is reasonable, not only directly affects the investment in infrastructure, operation costs and the consumption of nonferrous metals will be reflected in the electricity supply reliability and security of production, it is the economic efficiency of enterprises, is closely related to personal safety equipment. Substation power system is an important ponent of the power,and plays an important role of acceptance, distribution, contacts , the stability of the system. The main electrical substation wiring is a major part of Substation power system ,the main electrical wiring running directly impacts the reliability, flexibility, and its formulation directly related to the choice of the electrical equipment ,retaining the arrangement of power distribution equipment, The main electrical substation wiring is part of the decisive factor in the size of electrical substation investment. 220kV substation belongs to highpressure work ,the region more involved, consider the problems and analysis of substation tasks and user load, etc., select the site, use user data loading calculation and determining the user reactive power pensation device. At the same time, choicing of a variety of transformers, substations to determining the connection mode, and then to shortcircuit current calculation, select and wire。 220kV變電站屬于高壓網(wǎng)絡(luò),該地區(qū)變電所所涉及方面多,考慮問題多,分析變電所擔(dān)負(fù)的任務(wù)及用戶負(fù)荷等情況,選擇所址,利用用戶數(shù)據(jù)進(jìn)行負(fù)荷計算,確定用戶無功功率補(bǔ)償裝置。河南理工大學(xué)萬方科技學(xué)院本科畢業(yè)論文 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)計越來越全面、系統(tǒng),工廠用電量迅速增長,對電能質(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,因此對供電設(shè)計也有了更高、更完善的要求。電氣主接線是變電所的主要部分,電氣主接線的方式直接影響運(yùn)行的可靠性、靈活性,它的擬定直接關(guān) 系著電氣設(shè)備的選擇、配電裝置的布置護(hù),是變電所電氣部分投資大小的決定性因素。 本次 220kV 變電所電氣部分設(shè)計是根據(jù)河南理工大學(xué)電氣學(xué)院 本科畢業(yè)設(shè)計工作手冊進(jìn)行的,主要包括主變壓 器、主接線形式的確定;短路電流計算;電氣設(shè)備的選擇;繼電保護(hù)及互感器的配置;防雷保護(hù)等幾個部分。 choice of electrical equipment。 Short— circuit current calculation 河南理工大學(xué)萬方科技學(xué)院本科畢業(yè)論文 i 目 錄 1 緒論 ............................................................................................................... 1 設(shè)計目的及意義 ...................................................................................... 1 國內(nèi)外相關(guān)領(lǐng)域的研究進(jìn)展 ................................................................. 1 變電所基本資料 ..................................................................................... 2 用戶負(fù)荷統(tǒng)計資料 ................................................................................. 2 變電所與電力系統(tǒng)的連接 ..................................................................... 3 設(shè)計任務(wù) ................................................................................................. 3 2 變壓器和主接 線 ........................................................................................... 4 主變壓器的選擇 ..................................................................................... 4 主變?nèi)萘康倪x擇 ............................................................................ 4 選用變壓器的原則 ........................................................................ 5 過負(fù)荷能力校驗 ............................................................................ 5 主接線選擇 ............................................................................................. 7 電氣主接線的設(shè)計原則 ................................................................ 7 220kV配電裝置主接線選擇 ........................................................ 7 110kV 配電裝置主接線選擇 ........................................................ 8 10kV配電裝置主接線選擇 .......................................................... 8 變電所電氣主接線圖 .................................................................... 9 3 短路電流計算 ............................................................................................. 10 短路電路計算的目的和說明 ............................................................... 10 短路電流計算 .............................................................................. 10 有關(guān)本變電所短路電流計算的說明 .......................................... 10 系統(tǒng)的等值電抗圖和短路點的選擇 ....................................................11 短路電流計算書 ....................................................................................11 標(biāo)準(zhǔn)值選取 ...................................................................................11 電路參數(shù)歸算 .............................................................................. 12 繪制等效電路圖 .......................................................................... 13 繪制短路電流計算結(jié)果表 .......................................................... 23 4 電氣設(shè)備的選擇 ......................................................................................... 25 斷路器的選擇 ....................................................................................... 25 220kV斷路器 .............................................................................
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