【正文】 700兆瓦火電廠電氣設(shè)計 摘 要 隨著我國經(jīng)濟發(fā)展，對電的需求也越來越大。電作為我國 經(jīng)濟發(fā)展最重要的一種能源，主要是 可以方便、高效地轉(zhuǎn)換成其它能源形式。 電力工業(yè)作為一種先進的生產(chǎn)力，是國民經(jīng)濟發(fā)展中最重要的基礎(chǔ)能源產(chǎn)業(yè)。而 火力發(fā)電 是電力工業(yè)發(fā)展中的主力軍 ， 截止 2021 年底，火電發(fā)電量達到 48405 萬千瓦，越占總?cè)萘?%。由此可見，火力電能在我國這個發(fā)展中國家的國民經(jīng)濟中的重要性。 該 設(shè)計主要從理論上在電氣主接線設(shè)計，短路電流計算，電氣設(shè)備的選擇，配電裝置的布局，防雷 設(shè)計，發(fā)電機、變壓器和母線的繼電 保護等方面做詳盡的論述，并與 火力發(fā)電廠現(xiàn)行運行情況比較，同時， 在保證設(shè)計可靠性的前提下，還要兼顧經(jīng)濟性和靈活性，通過計算論證 火電廠實際設(shè) 計的合理性與經(jīng)濟性。 采用軟件繪制了大量電氣圖 和查閱相關(guān)書籍 ，進一步完善了設(shè)計。 關(guān)鍵詞 ： 主接線設(shè)計；短路電流；配電裝置；電氣設(shè)備選擇； 繼電保護 Electric design of the 700 megawatt firepower plant Abstract With the developing of economy in our country,we need more and more Electricity Electricity is the most important energy of economic development which can be conveniently and efficiently converted into other forms of energy. The Electricity industry as a advanced produced energy. It is the most important basic energy the thermoelectricity is the main energy in the Electricity industry .Until the end of 2021,power Electricity produce is 48405 kilowatt,occupied percent in the entire thermoelectricity energy plays an important role in our country which is a developing country. In this design, I will mainly discuss main electric connection design, short circuit account, electric equipment choice, electric equipment layout, lightning strike defending design, electrical machine, transformer and generatrix protective relaying detailedly in theory and paring with the power plant, while ensuring the reliability of the design, under the premise we should also take into account economic and flexibility demonstrated by calculating the effective 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 ...........................................................................