【正文】
畢業(yè)設計(論文) 題 目: 甘肅大峽水電 站繼電保護及 二次回路設計 學 院: 電子信息學院 專業(yè)班級: 電氣工程及其自動化 06 級 1 班 指導教師: 職稱 : 講師 學生姓名: 學 號: 40604040108 西安工程大學本科畢業(yè)設計(論文) I 摘 要 由于大型水電站的母線、發(fā)電機和變壓器的結(jié)構(gòu)比較復雜,在運行過程中都可能會發(fā)生各種各樣的故障和異常運行狀態(tài),為了確保在保護范圍內(nèi)發(fā)生故障,都能有選擇性的快速切除故障,需要配置多種繼電保護裝置,必要時進行多重化配置,從而將水電站中重要設備的危害和損失降到最小,對電力系統(tǒng)的影響最小。 發(fā)電廠和變電所母線是電力系統(tǒng)中的中的一個重要組成部件,發(fā)電機的安全運行對保證電力系統(tǒng)的正常工作和電能質(zhì)量起著決定性的作用;而變壓器是電力系統(tǒng)十分重要的供電元件 再者,發(fā)電機、變壓器本身就是十分貴重的電氣元件,所以,繼電保護裝置對大型水電站的正常運行起著至關重要的作用。 根據(jù)大峽水電站的接線圖及相關資料。本設計共包括六章,分別對母線、發(fā)電機、變壓器的繼電保護進行詳細介紹,并給出相關的整定計算,畫出部分二次接線圖。 本文主要通過分析原始資料中主要設備的參數(shù),首先,需要對電力系統(tǒng)保護原理進行全面系統(tǒng)的復習、查閱相關資料,加深理解;其次,結(jié)合相關參數(shù)和各種繼電保護原理,確定適用于大峽水電站的保護方案,最后,分別對母線處、發(fā)電機和變壓器進行整定計算和配置,并且根據(jù)系統(tǒng)一 次設計圖給出部分二次設計及其配置圖和一般原理圖。 關鍵詞 :水電站、繼電保護、發(fā)電機、變壓器、母線、二次回路 西安工程大學本科畢業(yè)設計(論文) II Abstract As a result of large hydroelectric station39。s bus bar, the generator and transformer39。s structure is quite plex, possibly will break down various in the movement process and exceptionally the running status, to guarantee that will break down in the extent of protection, can have the selective fast excision breakdown, needs to dispose many kinds of relay protection installments, when the necessity will carry on the multidensified disposition, thus in the river water power plant the important equipment39。s harm and the loss will fall to are smallest, will be smallest to electrical power system39。s influence. The power plant and the transformer substation bus bar is in an electrical power system39。s important building block, generator39。s safe operation to guaranteed that electrical power system39。s normal work and the electrical energy quality are playing the decisive role。 Furthermore but the transformer is the electrical power system very important power supply part, the generator, the transformer itself are the very precious electrical elements, therefore, relay protection installment to large hydroelectric station normal operation very important function. According to Daxia hydro power station wiring diagram and correlation data. This design altogether includes six chapters, to the bus bar, the generator, transformer39。s relay protection carries on separately introduced in detail, and gives the related installation putation, draws the partial secondary circuit chart. This article mainly through analysis firsthand information in major installation39。s parameter, first, needs to carry on the prehensive system39。s review, the consult correlation data to the electrical power system protection principle, deepens understanding。 Next, the union related parameter and each kind of relay protection principle, determined that is suitable in the big canyon hydroelectric power station protection plan, finally, separately to the bus bar place, the generator and the transformer carries on the installation putation and the disposition, and gives the part two designs and the disposition chart and the general schematic diagram according to a system design drawing. Key word: Hydroelectric power station, relay protection, generator, transformer, bus bar, secondary circuit 西安工程大學本科畢業(yè)設計(論文) III 目 錄 前 言 .............................................................. 1 第 1 章 電力系統(tǒng)繼電保護簡論 ........................................ 3 繼電保護的作用 .............................................. 3 繼電保護的基本要求、原理、構(gòu)成與分類 ........................ 4 基本要求 .............................................. 4 基本原理 .............................................. 4 構(gòu)成 .................................................. 7 分類 .................................................. 8 第 2 章 主變壓器保護設計 ............................................ 9 ............................................ 9 ............................ 9 變壓器保護配置原則 ......................................... 10 變壓器縱聯(lián)差動保護 ......................................... 12 構(gòu)成變壓器縱差動保護的基本原則 ....................... 12 變壓器差動保護的不平衡電流 ........................... 16 變壓器后備保護 ............................................. 21 低電壓啟動的過電流保護 .............................. 21 ................................... 22 過負荷保護 ........................................... 23 變壓器保護的整定計算 ....................................... 24 瓦斯保護的整定 ....................................... 24 變壓器縱差保護正定計算 ............................... 24 過電流保護整定計算 ................................... 27 低電壓啟動的過電流保護整定計算 ....................... 27 第 3 章 發(fā)電機保護設計 ............................................ 29 發(fā)電機故障及不正常運行狀態(tài) ................................. 29 發(fā)電機故障類型 ....................................... 29 不正常運行狀態(tài) ....................................... 29 西安工程大學本科畢業(yè)設計(論文) IV 發(fā)電機縱差保護 ............................................. 31 工作原理 ............................................. 31 發(fā)電機縱差保護整定 ................................... 32 發(fā)電機橫差保護 ............................................. 34 發(fā)電機定子繞組單相接地保護 ................................. 36 發(fā)電機負序電流保護 ......................................... 36 定時限過電流保護 ..................................... 36 反時限負序過電流保護 ................................. 38 發(fā)電機失磁保護 ............................................. 39 勵磁回路一點接地保護 ....................................... 39 復合電壓啟動的過電流保護 ................................... 40 發(fā)電 機保護的整定計算 ....................................... 41 BCH2 型繼電器構(gòu)成的差動保護 ........................ 41 橫聯(lián)差動保護整定計算 ................................. 43 復合電壓啟動的過電流保護 ............................. 43 第 4 章 母線保護 .................................................. 45 ..........................