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1、…………………….……………….…………………山東農(nóng)業(yè)大學(xué)畢業(yè)論文小電流接地選線分析院部機(jī)械與電子工程學(xué)院____專業(yè)班級電氣工程及其自動化班屆次__________學(xué)生姓名__________學(xué)號__________指導(dǎo)教師_____年月日裝訂線……………….…….………….………….………28目錄目錄1摘要3Abstract3緒論31小電流接地選線方法研究的歷史及現(xiàn)狀介紹31.1國外研究概況31.2國內(nèi)研究現(xiàn)狀32?故障現(xiàn)象分析與判斷33典型的小電流接地系統(tǒng)發(fā)生單相接地故障時選線方法33.1基于零序電流基波的選線方法33.1.2諧波分量法33.1.3利用接地故障暫態(tài)過程的選線法3
2、3.1.4基于最大?(IsinΦ)原理的選線方法33.1.5有功分量法33.2不利用故障零序電流來選線33.2.1拉線法33.2.2“S注入法”33.2.3注入變頻信號法34各種小電流接地選線方法的優(yōu)缺點(diǎn)分析35?單相接地故障的處理步驟36?處理單相接地故障的要求37仿真模型37.1接地電阻為100時37.2接地電阻為400時3結(jié)論3參考文獻(xiàn)3致謝328ContentsAbstract3Introduction31Thehistoryandpresentsituationofsmallcurrentgroundinglineselection51.1Foreignresearchsu
3、rvey51.2Domesticresearchstatusquo62?Faultphenomenonanalysisandjudgment73Atypicalsmallcurrentgroundingsystemfortheoccurrenceofsingle-phase83.1Themethodofselectinglinebasedonzerosequencecurrent83.1.2Harmoniccomponentmethod103.1.3Themethodofselectingthefaulttransientprocessofthegroundingfault113.1
4、.4Basedon?(IsinΦ)lineselectionmethod113.1.5Activecomponentmethod[16]123.2Donotusefaultzerosequencecurrenttoselecttheline123.2.1Pullmethod123.2.2“SInjectionmethod”133.2.3Injectionfrequencyconversionsignalmethod134Theadvantagesanddisadvantagesofvarioussmallcurrentgroundinglineselectionmethod35?Tr
5、eatmentstepofsinglephasetogroundfault36?Therequestfordealingwiththesingle-phasegroundingfault3Reference3Conclusion3Thank328小電流接地選線分析（山東農(nóng)業(yè)大學(xué)機(jī)械與電子工程學(xué)院）摘要：我國的中壓電網(wǎng)基本上都是小電流接地系統(tǒng)，單相接地故障率最高,因此如何檢測并隔離接地故障線路，成為配電自動化的一個重要研究課題.就小電流接地系統(tǒng)發(fā)生單相接地故障的十余種故障選線方法分析了其原理及各自相應(yīng)的特點(diǎn),為小電流接地系統(tǒng)實(shí)現(xiàn)配電自動化提供了重要依據(jù)。關(guān)鍵詞：小電流接地系統(tǒng)單相接地故
6、障選線零序電流消弧線圈28AnalysisofsmallcurrentgroundinglineselectionHuichaoLiu(Mechanical&ElectricalEngineeringCollegeofShandongAgriculturalUniversity,Tai’an,Shandong271018)AbstractThemediumvoltagepowernetworkbasicallyisinsmallcurrentneutralgroundingsystem,single-phasegroundingfaultrateisthehighest,sohowt
7、odetectandisolatethefaultline,hasbecomeanimportantissueinthestudyofdistributionautomation.Onthesmallcurrentgroundsystemsinglephasetogroundfaultoccursinmorethantenkindsoffaultlineselectionmethodanalysistheitsprincipleandtheirrespec
