【正文】 ve thermal power plant design and reasonable my counting and demonstrating,in order to consummate my design, I will protract a great lot of electric engineeringpictures following the new criterion of electric engineeringenchiridion. Keywords： main electric connection design ； short current； electric equipment choice electric equipment layout； protective relaying 目 錄 1 前言 ........................................................................................................................................ 1 課題背景 ............................................................................................................................ 1 課題研究的目的和意義 .................................................................................................... 2 本課題的主要研究工作 .................................................................................................... 2 設(shè)計內(nèi)容 ......................................................................................................................... 2 擬解決的關(guān)鍵問題 ......................................................................................................... 3 2 電氣主接線設(shè)計 ..................................................................................................................... 4 明確任務(wù)和設(shè)計原理 ........................................................................................................ 4 原始資料 ......................................................................................................................... 4 原始資料的分析 ............................................................................................................. 5 、論證和選擇 ................................................................................................. 5 3 發(fā)電廠系統(tǒng)設(shè)計 .................................................................................................................... 8 設(shè)計的要求 ........................................................................................................................ 8 廠用電高，低電壓的考慮 ............................................................................................ 8 工作電源引接方式 ......................................................................................................... 8 確定用電系統(tǒng) ................................................................................................................ 8 ..................................................................................................................... 8 4 短路電流計算 ................................................................................................................ 10 短路的原因及形式 .......................................................................................................... 10 短路電流計算的目的 .................................................................................................... 10 短路電流計算的 方法 .................................................................................................... 10 短路電流 分析 ...................................................................................................................11 5電氣設(shè)備的選擇 ................................................................................................................... 22 ........................................................................................................... 22 ................................................................................... 22 ................................................................................................... 23 ....................................................................................................................... 26 6 配電裝置 ............................................................................................................................... 27 110kV 配電裝置 ............................................................................................................... 27 6kV 配電裝置 ................................................................................................................... 27 7 繼電保護 ............................................................................................................................... 28 發(fā)電機的保護 .................................................................................................................. 28 ................................................................................................................... 29 ........................................................................................................................... 31 8 防雷保護 ............................................................................................................................... 32 .................................................................................................................. 32 .................................................................................................. 32 ................................................................................................................... 33 ................................................................................................................... 34 9．總結(jié)與展望 ........................................................................................................................ 35 參考文獻 …………………………………… ………… ..……………………………………… …… …… 36 致 謝 ...................................................................................................................................... 37 700 兆瓦火電廠電氣設(shè)計 1 1 前言 課題背景 電力工業(yè)是國民經(jīng)濟的重要部門之一，是一種將煤，石油，天然氣，水能，核能，風能等一次能源轉(zhuǎn)換成電能這個二次能源的工業(yè)，作為國民經(jīng)濟的其他各部門的快速，穩(wěn)定發(fā)展提供足夠的動力，其發(fā)展水平是反映國家經(jīng)濟發(fā)達程度的重要標志，又和廣大人民群眾的日常生活有著密切的關(guān)系。 近幾年隨著我國工業(yè)的高速發(fā)現(xiàn)，我國電力工業(yè)超常規(guī)發(fā)展，每年裝機容量超過6000 萬千瓦， 30萬千瓦、 60 萬千瓦亞臨界火電機組成為我國電網(wǎng)的主力機組。這幾年電力工業(yè)之所以能飛速發(fā)展，其重要原因是，為中國電力市場提供的火力發(fā)電設(shè)備主要立足于國內(nèi)生產(chǎn)。今天電氣制造企業(yè)的國內(nèi)用戶率已達到 75%以上 。 目前，我國的電