【正文】 4300MW 發(fā)電廠第二期工程電氣部分初步設(shè)計 I 摘 要 本 畢業(yè)設(shè)計論文是 4?300MW 發(fā)電廠第二 期工程電氣部分初步設(shè)計。全論文除了摘要、畢業(yè)設(shè)計書之外，還詳細(xì)的說明了各種設(shè)備選擇的最基本的要求和原則依據(jù)。變壓器的選擇包括：發(fā)電廠主變壓器、高壓備 用變壓器及高壓廠用變壓器的臺數(shù)、容量、型號等主要技術(shù)數(shù)據(jù)的確定。 電氣主接線主要介紹了電氣主接線的重要性、設(shè)計依據(jù)、基本要求、各種接線 形式的優(yōu)缺點以及主接線的比較選擇，并制定了適合本廠要求的主接線。 廠用電接線包括：廠用電接線的總要求以及廠用母線接線。短路電流計算是最重 要的環(huán)節(jié)，本論文詳細(xì)的介紹了短路電流計算的目的、假定條件 、一般規(guī)定、元件參數(shù)的計算、網(wǎng)絡(luò)變換、以及各短路點的計算等知識。 高壓電氣設(shè)備的選擇包括母線、高壓斷路器、隔離開關(guān)、電流互感器、電壓互感器、高壓開關(guān)柜的選擇原則和要求，并對這些設(shè)備進(jìn)行校驗和產(chǎn)品相關(guān)介紹。而根據(jù)本論文所介紹的高壓配電裝置的設(shè)計原則、要求和 500KV 的配電裝置，決定此次設(shè)計對本廠采用分相中型布置。繼電保護(hù)和自動裝置的規(guī)劃，包括總則、自動裝置、一般規(guī)定和發(fā)電機(jī)、變壓器、母線等設(shè)備的保護(hù)，而發(fā)電廠和變電所的防 雷保護(hù)則主要針對避雷針和避雷器的設(shè)計 。此外，在論文適當(dāng)?shù)奈恢眠€附加了圖紙（主接線、平面圖、防雷保護(hù)等）及表格以方便閱讀、理解和應(yīng)用。 關(guān)鍵詞： 火力發(fā)電廠 電氣設(shè)計 短路計算 設(shè)備選擇 配電裝置 沈陽工程學(xué)院畢業(yè)設(shè)計 II Abstract This graduate design thesis is a 4300 MW： A power plant the second period engineering electricity parts of first steps design. Whole thesis besides summary graduate to design the book outside, returned the expatiation every kind of most basic request that equipments choose with principle according to. The choice of the transformer includes: Main transformer, high pressure in power plant back transformer and high pressure factories use the main technique in number, capacity, model number...etc. in set data of the transformer to really settle. The electricity lord connected the line to introduce primarily the electricity lord connects the linear importance, design according to, the basic request, every kind of merit and shorting and lords that connect the line form connects the linear choosing more, the lord that bine to establish the in keeping with my plant the request connects the line。 The factory connects with the electricity the line includes: The factory connect the linear total request and factory to connect the line design with the mother line with the electricity. The shortcircuit galvanometer is regarded as the most important link, this thesis introduced the calculating purpose in shortcircuit electric current, assumption term, general provision, the calculation, work transformation of a parameter detailedly, and each calculation etc. knowledge that short circuit order。 The choice of the high pressure electricity equipments includes the mother line, high pressure breaks the road machine and insulate the switch, electric current to feels with each other the machine, electric voltage feels with each other the choice principle of the machine, high pressure switch cabi with request, and proceed to these equipments the school check with the related introduction in product .But go together with the design principle of the electricity device, request to go together with the electricity device with 500KV according to this thesis a high pressure for introducing, decide this time design to adopt the cent the mutually mediumsized arranging to the my plant. After electricity protection with the programming of the automatic device, include total, automatic device, general provision with the protection of generator, transformer, mother line etc. equipments, but power plant with change to give or get an electric shock a design for defending thunder protecting then primarily aiming at lightning rod with lightning arrester. In addition, return in the appropriate position in thesis additional diagram paper (the lord connects the line, plane chart and defend thunder protection etc.) and forms read, prehend with the convenience with applied. Key word: Thermal power plant Electricity design Short circuit calculation Equipments choice Electricity equips 4300MW 發(fā)電廠第二期工程電氣部分初步設(shè)計 III 目 錄 摘 要 .............................................................................................................................................. I ABSTRACT ...................................................................................................................................II 目錄 ............................................................................................................................................... III 第一部分 說明書 .................................................................................................................... 1 第 1 章 發(fā)電機(jī)和主 變壓器的選擇 .......................................................................................... 1 發(fā)電機(jī)的選擇 ................................................................................................................... 1 主變壓器的選擇 ............................................................................................................... 1 主變壓器與發(fā)電機(jī)的連接形式 ............................................................................... 1 發(fā)電廠主變壓器容量和臺數(shù)的確定 ....................................................................... 1 變壓器型式的選擇 ................................................................................................... 2 第 2 章 電氣主接線的 設(shè)計 ...................................................................................................... 4 總則 ................................................................................................................................... 4 大型電廠的電氣主接線 ................................................................................................... 4 第 3 章 廠用電接線 .................................................................................................................. 7 廠用電接線設(shè)計原則 ....................................................................................................... 7 廠用電供電電壓等級的確定 ........................................................................................... 7 廠用電源的引接 ............................................................................................................... 7 高壓廠用工作電源的引接 ....................................................................................... 8 低壓廠用工作電源引接 ............................