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1、本科畢業(yè)論文題目復(fù)雜電網(wǎng)的短路電流計算系自動控制系專業(yè)電氣工程與自動化班級學(xué)號學(xué)生姓名指導(dǎo)教師完成日期摘要短路是指一切不正常的相與相之間或相與地(對于中性點接地系統(tǒng))發(fā)生通路的情況。在電力系統(tǒng)和電氣設(shè)備的設(shè)計和運行中,短路計算是解決一系列技術(shù)問題所不可缺少的基本計算,比如選擇一些電氣設(shè)備;為了合理地配置各種繼電保護(hù)和自動裝置并正確整定其參數(shù);進(jìn)行電力系統(tǒng)暫態(tài)穩(wěn)定計算;研究用戶對短路工作的影響等,都需要進(jìn)行短路計算。論文研究了對稱分量法的原理,再編制MATLAB語言對電力系統(tǒng)的各種短路進(jìn)行分析計算,如單相接地短路、兩相短路、兩相接地短路等。最后對典型算例進(jìn)行了分析計算、仿真,研究了當(dāng)
2、系統(tǒng)發(fā)生單相接地短路,兩相接地短路時的電流和電壓,算后的數(shù)據(jù)與手算的數(shù)據(jù)很接近,證明了MATLAB的可靠性。同時與手算法相比,用MATLAB語言編程計算更為方便,速度更快,是電力系統(tǒng)短路電流計算最好的計算機算法之一。關(guān)鍵詞;電力系統(tǒng);短路計算;分量對稱法ABSTRACTShortcircuitmeanstheallmutuallytomutuallyormutuallytoground(connectagroundofsystemtotheneutergenderpoint)thattakeplacethoroughfareabnormality.Inthedesignandmov
3、ementoftheelectricpowersystemandtheelectricityequipments,theshort-circuitcalculationisthebasiccalculationthatresolvesaseriesoftechniqueproblems,choosingsomeelectricityequipments,suchas,installingreasonablyvariousafterelectricityprotectionandautomaticallyequippingcombinerightwholesettleitsparam
4、eter;carryingontheelectricpowersystemtemporaryappearanceastabilityacalculation;studyingtheinfluenceofthecustomerupontheshort-circuitworketc.,Alltheseneedtocarryonashort-circuitcalculation.Inthispaper,acomponentoftheprincipleofsymmetry,re-useMATLABlanguageonthepowersystemofcalculatingshort-circ
5、uitanalysis,finallythispaper,atypicalexampleofcalculation、simulation,onasingle-phasegroundwhenashortcircuit,twophase-to-groundshort-circuitthecurrentandvoltage,aftercountingthehandcountingofthedataandthedataisverycloseto,provedthereliabilityofMATLAB.Atthesametimecomparedwiththehandalgorithm,us
6、ingMATLABlanguagecomputingmoreconvenient,faster,sopowersystemisshort-circuitcurrentcalculationofoneofthebestcomputeralgorithms.Keywords:Electricpowersystem;Short-circuitcalculation;Symmetricalmethod目錄1引言-------------------------------------------------------------------------------------11.1短路
7、的概述---------------------------------------------------------------------------11.1.1短路的基本概念----------------------------------------------------------------11.1.2短路故障產(chǎn)生的原因----------------------------------------------------------11.1.3短路