【正文】 沈陽(yáng) 工程學(xué)院 畢業(yè)設(shè)計(jì) I 摘 要 本畢業(yè)設(shè)計(jì)論文是砂嶺二次變電所電氣工程（部分）初步設(shè)計(jì)。 它主要包括電氣設(shè)備的選擇，主接線的比較，短路計(jì)算，配電裝置的布置以及防雷保護(hù)等。其中電氣主接線是電氣設(shè)計(jì)中最為重要的一環(huán)，文中通過(guò)對(duì)兩種主接線的經(jīng)濟(jì)性、可靠性以及優(yōu)缺點(diǎn)的比較，得出最適合本所要求的主接線；短路計(jì)算是設(shè)備選擇的基礎(chǔ)，網(wǎng)絡(luò)變換，短路點(diǎn)的選擇，以及元件參數(shù)的計(jì)算，每一步都需要嚴(yán)密、謹(jǐn)慎，不能有一絲一毫的馬虎大意，否則可能對(duì)設(shè)備的選擇造成極大的影響；電氣設(shè)備主要是針對(duì)高壓電氣設(shè)備而言，（包括母線、高壓斷路器、隔離開(kāi)關(guān)、電流 互感器、電壓互感器、避雷器、補(bǔ)償電容器等），文中詳細(xì)介紹了各種電氣設(shè)備的選擇方法和校驗(yàn)方式；配電裝置的布置和防雷保護(hù)是息息相關(guān)的，根據(jù)配電裝置的設(shè)計(jì)原則和本所的具體情況，本次設(shè)計(jì)采用的是普通中型布置；而根據(jù)這種配電布置方式和面積，對(duì)于防雷保護(hù)的設(shè)計(jì)決定采用避雷針和避雷器來(lái)構(gòu)成。當(dāng)然文中也涉及了自動(dòng)裝置和繼電保護(hù)的配置，并在適當(dāng)位置附加了圖紙（主接線圖、平面圖、斷面圖、防雷保護(hù)圖等）以及表格、插圖等方便閱讀、理解。 由于時(shí)間緊張和能力有限，此論文中難免會(huì)出現(xiàn)遺漏和錯(cuò)誤，希望老師給予指點(diǎn)和更正。最后，感謝各位老 師給予我的幫助和大力支持，正因?yàn)槟銈兙牡闹笇?dǎo)本次論文才得以更好的完成。十分感謝！ 關(guān)鍵字：電力系統(tǒng) 短路計(jì)算 設(shè)備選擇 校驗(yàn) 沈陽(yáng) 工程學(xué)院 畢業(yè)設(shè)計(jì) II ABSTRACT The graduation thesis is about initial designing of electrical engineering (part) for the substation in ShaLing. It mainly includes the parison of chief wiring, the calculating for shortingcurrent, the choice for the electrical equipment, the arrangement for the distribution device and etc. The electrical chief wiring is one of the most important links in the electrical designing. In the text, by paring the economic, reliability, advantage (disadvantage) for the two kinds of chief wirings, in order to get the most being required。 Network transformation, the choice for the point of shortcircuit, the calculating for the parameter of device and etc, in these steps, each one needs to be cautious, otherwise it will bring tremendous effect to the choice of equipment。 Electrical equipment (high voltage) includes bus, high voltage breaker, CT, PT, lightning arrester and pensatecapacitor. In this text all kinds of equipments’ choosing and proofreading methods are introduced detailedly。 The arrangement for the distribution device is integrate with the protection for defending thunder and lightning, so according to the principle of plan and the concrete situation of this substation, I choose a arrangement plan of ordinary and mediumsized, while adopt lightning rod and lightning arrester to constitute the protection for defending thunder and lightning. Of course, this article also simply introduces the designing for the automatic device and the relay’s protection, meanwhile it adds up some design drawing (chief wiring’s drawing, plane figure, section diagram, the drawing of protection for defending thunder and lightning and etc) table and illustration in order to read and understand more easily. Because time strain with ability limited, this thesis inside difficult do not need to will appear the lapse with mistake, hope the teacher give to point out with make correction. Finally, thanks for each teacher to give my help with support strongly , because of your meticulous care of leading this thesis just can better plete. Key words: Power System Short circuit calculation The choice of the equipments Proofreading 沈陽(yáng) 工程學(xué)院 畢業(yè)設(shè)計(jì) III 目 錄 摘 要 ...................................................................................................................... I ABSTRACT................................................................................................................... II 目 錄 ....................................................................................................................III 引 言 ..................................................................................................................... 1 第一部分 砂嶺 60KV降壓變電所設(shè)計(jì)說(shuō)明書 .......................................................... 2 第一章 任務(wù)書 ............................................................................................................. 2 第二章 主變壓器的選擇 ............................................................................................. 4 變電所主變壓器的容量和臺(tái)數(shù) ......................................................................... 4 變壓器容量的確定 .......................................... 4 主變壓器的臺(tái)數(shù)的確定 ...................................... 4 主變壓器型式的選擇 ......................................................................................... 5 相數(shù)的選擇 ................................................ 5 主變壓器繞組的數(shù) 量 ........................................ 5 繞組連接方式 .............................................. 5 第三章 電氣主接線的選擇 ......................................................................................... 6 主接線的設(shè)計(jì)原則及基本要求 ......................................................................... 6 主接線的選擇 ..................................................................................................... 7 60KV 側(cè)主接線的選擇 ....................................... 7 10KV 側(cè)主接線的選擇 ....................................... 8 第四章 短路電流計(jì)算 ............................................................................................... 10 計(jì)算短路電流的目的 : ...................................................................................... 10 計(jì)算條件 ........................................................................................................... 10 電氣系統(tǒng)短路電流計(jì)算條件 ................................. 10 一般規(guī)定 ................................................. 11 限制措施 ................................................. 11 短路電流的計(jì)算方法 ....................................................................................... 12 短路 電流 的計(jì)算 （詳細(xì)計(jì)算步驟見(jiàn)計(jì)算書） ............................................... 12 第五章 變電所設(shè)備的選擇與校驗(yàn) ........................................................................... 13 電器設(shè)備選擇的一般問(wèn)題 ............................................................................... 13 沈陽(yáng) 工程學(xué)院 畢業(yè)設(shè)計(jì) IV 高壓電器選擇的一般要求 ............................................................................... 13 一般原則 ................................................. 13 技術(shù)條件： ............................................... 14 絕緣水平： ...............................................