【正文】 摘 要本說明書以220KV地區(qū)變電站設(shè)計(jì)為例，論述了電力系統(tǒng)工程中變電站部分電氣設(shè)計(jì)（一次部分）的全過程。通過對(duì)變電站的主接線設(shè)計(jì)，站用電接線設(shè)計(jì)，短路電流計(jì)算，電氣設(shè)備動(dòng)、熱穩(wěn)定校驗(yàn)，主要電氣設(shè)備型號(hào)及參數(shù)的確定，運(yùn)行方式分析，防雷及過電壓保護(hù)裝置的設(shè)計(jì)，電氣總平面及配電裝置斷面設(shè)計(jì)和無(wú)功補(bǔ)償方案設(shè)計(jì)，較為詳細(xì)地完成了電力系統(tǒng)中變電站設(shè)計(jì)。限于畢業(yè)設(shè)計(jì)的具體要求和設(shè)計(jì)時(shí)間的限制，本畢業(yè)設(shè)計(jì)只對(duì)變電站電氣一次部分做了較為詳細(xì)的理論設(shè)計(jì)，而對(duì)其電氣二次部分并沒有涉及，這有待于在今后的學(xué)習(xí)和工作中進(jìn)行研究。關(guān)鍵詞：變電站 短路電流 動(dòng)穩(wěn)定 熱穩(wěn)定 過電壓保護(hù)裝置 無(wú)功補(bǔ)償 ABSTRACTThe statement about the 220kv transformer area substation design, discussed some electrical transformer stations design (one part) in power systems engineering of the entire process. Through the main transformer stations wiring design, stations wiring design stations, short circuit current calculations, check electrical equipment moving and thermal stability, set the main electrical equipment models and the parameters, the operating mode, design overvoltage protection and mine devices , design general electric graphic and distribution devices flood, and without power pensation. Lastly,pleted substation design in power system. Limited to the specific design requirements and design time of constraints, The design only is a part of the electrical transformer stations, and its second part did not involve, which research it in future study and work. KEY WORDS: Substation, Short circuit currents , Moving stability，Thermal stability，Overvoltage protection devices，Without power pensation目 錄摘 要 ....................................................................IABSTRACT .................................................................II第 1 章 引言 ...............................................................1第 2 章 .主接線設(shè)計(jì) ........................................................2 電氣主接線的一般要求 ...............................................2 主接線選擇的主要原則 ...............................................3 主接線方案設(shè)計(jì) .....................................................3 方案擬定及技術(shù)比較 ............................................3 方案的經(jīng)濟(jì)性比較 ..............................................5 主變的選擇 .....................................................92. 3. 4. 1 選擇原則 ................................................9 容量計(jì)算 ..................................................10本章小結(jié) .................................................................11第 3 章 站用電接線及設(shè)備用電源接線方案 ....................................12 所用電源數(shù)量及容量 ...............................................12 所用電源引接方式 ..................................................12 所用變壓器低壓側(cè)接線 .............................................12 所站用電接線 ......................................................13 備用電源 ..........................................................13本章小結(jié) .................................................................14第 4 章 短路計(jì)算 ..........................................................15 短路故障產(chǎn)生的原因 ................................................15 短路故障的危害 ...................................................16 短路電流計(jì)算的目的 ...............................................16 短路電流計(jì)算的內(nèi)容 ................................................17 短路電流計(jì)算方法 .................................................17 三相短路電流周期分量起始值的計(jì)算 ..................................18 短路電流計(jì)算的基準(zhǔn)值 ..........................................18 網(wǎng)絡(luò)模型 ......................................................18 三相短路電流周期分量起始值的計(jì)算步驟 ..........................18本章小結(jié) .................................................................22第 5 章 設(shè)備的選擇及動(dòng)、熱穩(wěn)定校驗(yàn) .......................................23 .......................................23 ...................................................24 斷路器、隔離開關(guān)的選擇原則 .......................................25 .....................................................28 電流互感器的選擇 ..............................................28 電壓互感器的選擇 .............................................30 熔斷器的選擇 .................................................30 所設(shè)備如下表 ..................................................31 .......................................................33 一般要求: ...................................................33 導(dǎo)體的選擇 ....................................................34 截面的選擇 ...................................................34 .....................................................37本章小結(jié) .................................................................38第 6 章 配電裝置 ..........................................................39 配電裝置的基本要求: ...............................................39 配電裝置的類型及特點(diǎn) ..............................................39 配電裝置的設(shè)計(jì)原則 ................................................40 配電裝置設(shè)計(jì)的基本步驟 ...........................................41 配電裝置的選用 ....................................................41 電氣總平面布置 ....................................................43本章小結(jié) .................................................................43第 7 章 防雷及過電壓保護(hù)裝置設(shè)計(jì) ..........................................44 避雷針 ............................................................44 避雷器 ............................................................45 防雷接地 ..........................................................46 變電所的防雷保護(hù) ..................................................47 變電所的進(jìn)線段保護(hù) ................................................48 接地裝置 .........................................................48本章小結(jié) .................................................................48第 8 章 無(wú)功補(bǔ)償 ..........................................................49 提高功率因數(shù)的意義 ...............................................49 補(bǔ)償裝置的確定： .................................................49 功補(bǔ)償容量計(jì)算 ....................................................50 補(bǔ)償?shù)淖畲笕菪詿o(wú)功量計(jì)算 ......................................50 變壓器補(bǔ)償?shù)淖畲蟮娜菪詿o(wú)功量 ..................................51本章小結(jié) .................................................................53第 5 章 結(jié)束語(yǔ) ......................................