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1、學(xué)號(hào)畢業(yè)設(shè)計(jì)說(shuō)明書(shū)某大學(xué)供電系統(tǒng)設(shè)計(jì)學(xué)生姓名專(zhuān)業(yè)名稱(chēng)電氣工程及其自動(dòng)化指導(dǎo)教師電子與信息工程系年月日某大學(xué)供電系統(tǒng)設(shè)計(jì)ThePowerSystemDesigningforXXUniversity摘 要通過(guò)對(duì)設(shè)計(jì)任務(wù)工程背景的分析,確定了各變電所高低壓主接線結(jié)構(gòu),并根據(jù)電源情況、負(fù)荷水平與功率因數(shù)要求等條件對(duì)全系統(tǒng)進(jìn)行了詳細(xì)設(shè)計(jì)。首先,計(jì)算實(shí)際負(fù)荷,選擇10kV供電用變壓器。屆時(shí)已考慮到無(wú)功功率補(bǔ)償因素,由此可以免去部分迭代過(guò)程,計(jì)算較為簡(jiǎn)便。在進(jìn)行上述設(shè)計(jì)過(guò)程中,確定了無(wú)功功率補(bǔ)償容量,得出計(jì)算負(fù)荷,由此選擇線纜。根據(jù)總
2、計(jì)算負(fù)荷選擇35kV供電用變壓器并進(jìn)行無(wú)功功率補(bǔ)償。其次,通過(guò)對(duì)系統(tǒng)的短路計(jì)算分析,選擇高低壓斷路器、高壓隔離開(kāi)關(guān)、開(kāi)關(guān)柜和互感器。再次,對(duì)35kV和10kV變電所的平面布置、照明、接地和防雷進(jìn)行設(shè)計(jì)。最后,根據(jù)系統(tǒng)需求進(jìn)行了計(jì)量、測(cè)量、保護(hù)與控制等二次回路設(shè)計(jì)。關(guān)鍵詞:供電系統(tǒng);負(fù)荷計(jì)算;短路計(jì)算;繼電保護(hù)ABSTRACTThisdesigndeterminedthehighandlowvoltagemainstructureforeachsubstationbytheactualsituationoftheprojec
3、t,andfinisheddetailfortheentiresystemaccordingtothepowersituation,theloadlevel,thepowerfactorandotherconditions.Firstly,the10kVpowertransformerswereselectedbytheactualloadcalculated.Thereactivepowercompensationwasconsideredwhenselectedthe10kVpowertransformers.Apar
4、tofiterativeprocesswasremoved,socalculationisrelativelysimple.Inthecourseofthat,calculationofthecompensationcapacity,powerload,cablestandardwereselected.35kVpowertransformerswasselectedbaseonthetotalpowerload,thereactivepowercompensationwasproceed.Secondly,highand
5、lowvoltagecircuitbreakers,highvoltageisolationswitch,switchcabinetsandtransformerswerechoosedthroughanalyzesforsystemshort-circuitcalculation.Thirdly,layout,lighting,groundingandlightningprotectionfor35kVand10kVsubstationweredevised.Finally,thesecondarycircuitwith
6、estimate,measurement,protectionandcontrolweredevisedaccordingtothesystemrequirements.Keywords:Powersystem;Loadcalculation;Short-circuitcalculation;Relayprotection目錄第1章設(shè)計(jì)內(nèi)容概況11.1設(shè)計(jì)原始依據(jù)11.1.1全部用電設(shè)備負(fù)荷情況11.1.2電源情況11.1.3氣象及其它資料11.2設(shè)計(jì)內(nèi)容和要求11.3設(shè)計(jì)方法和步驟31.3.1設(shè)計(jì)原則和方法31.3.2設(shè)
7、計(jì)步驟3第2章供電系統(tǒng)結(jié)構(gòu)及變電所主接線結(jié)構(gòu)設(shè)計(jì)42.1供電系統(tǒng)結(jié)構(gòu)設(shè)計(jì)42.1.135kV變電所主接線結(jié)構(gòu)方案選擇42.1.210kV變電所主接線結(jié)構(gòu)方案選擇72.2變配電站的站用電源7第3章系統(tǒng)的負(fù)荷分析及主設(shè)備選擇83.1系統(tǒng)負(fù)荷分析概述83.1.1系統(tǒng)的計(jì)算負(fù)荷83.1.2無(wú)功功率補(bǔ)償83.1.3供電用變壓器93.210kV等級(jí)負(fù)荷計(jì)算及電容補(bǔ)償計(jì)算93.2.110kV變電所負(fù)荷計(jì)算103.2.210kV等級(jí)線纜選擇123.335kV等級(jí)負(fù)荷計(jì)算及電容補(bǔ)償計(jì)算153.3.135kV變電所負(fù)荷計(jì)算153.3.235k
8、V等級(jí)線纜選擇15第4章系統(tǒng)的短路分析174.1短路及短路電流174.1.1短路電流計(jì)算的目的174.1.2短路電流計(jì)算的規(guī)定174.1.3短路計(jì)算基本假設(shè)184.2短路電流計(jì)算184.2.1系統(tǒng)參數(shù)184.2.235kV進(jìn)線斷路器出口處短路電流194.2.335/10.5kV變壓器二次側(cè)出口處短路電流