電力系統(tǒng)繼電保護(hù)基礎(chǔ)BasicsofPowerSystemRelayProtection情境四：電流繼電器實(shí)驗(yàn)Scenario4:Currentrelayexperiment01實(shí)驗(yàn)?zāi)康腅xperimentalpurpose12熟悉DL-32型電流繼電器的內(nèi)部結(jié)構(gòu)，掌握其工作原理學(xué)會(huì)該型繼電器動(dòng)作值及返回值的測(cè)量方法并計(jì)算繼電器的返回系數(shù)FamiliarwiththeinternalstructureofDL-32currentrelayandmasteritsworkingprincipleLearnhowtomeasuretheoperatingandreturnvaluesofthistypeofrelayandcalculatethereturncoefficientoftherelay02實(shí)驗(yàn)項(xiàng)目Experimentalproject1調(diào)整電流繼電器的整定值“2測(cè)量電流繼電器的動(dòng)作電流、返回電流并計(jì)算其返回系數(shù)“AdjustthesettingvalueofthecurrentrelayMeasuretheoperatingcurrentandreturncurrentofacurrentrelayandcalculationofitsreturncoefficient03實(shí)驗(yàn)設(shè)備Experimentalequipment序號(hào)Number設(shè)備名稱DeviceName符號(hào)symbol型號(hào)model規(guī)格specifications數(shù)量quantity備注Remarks1單相接觸調(diào)壓器SinglephasevaritranTRTDGC-22KVA1臺(tái)

2滑線式變阻器Slider-typerheostatRBX3-216

/8A1個(gè)

3電流表ammeterPAT51-A5/10A1只

4單相交流電源開(kāi)關(guān)Single-phaseACpowerswitchS

1個(gè)在實(shí)驗(yàn)臺(tái)板上Onthelabbench5電流繼電器CurrentrelayKADL-32

1個(gè)在實(shí)驗(yàn)臺(tái)板上Onthelabbench6指示燈indicatorlightHL

1個(gè)在實(shí)驗(yàn)臺(tái)板上Onthelabbench7電池組batterypack+、

6V1組在實(shí)驗(yàn)臺(tái)板上Onthelabbench04實(shí)驗(yàn)方法Experimentalmethod實(shí)驗(yàn)接線/EXPERIMENTALWIRING104實(shí)驗(yàn)方法Experimentalmethod操作步驟2/OPERATIONSTEPS(1)將電流繼電器的兩線圈進(jìn)行串聯(lián)連接。(2)將單相接觸調(diào)壓器(TR)手柄旋至零位，電流表置在合適的量程。Connectthetwocoilsofthecurrentrelayinseries.Turnthehandleofthesinglephasevaritran(TR)tothezeropositionandsettheammeterattheappropriaterange.04實(shí)驗(yàn)方法Experimentalmethod(3)根據(jù)整定電流

Iset

的大小，將整定把手箭頭撥至相應(yīng)刻度，合上單相電源開(kāi)關(guān)S，緩慢而均勻地調(diào)節(jié)調(diào)壓器的輸出電壓，使繼電器電流慢慢地增加，直至繼電器動(dòng)作，指示燈亮停止調(diào)節(jié)。記下此時(shí)的電流數(shù)值，即為繼電器的動(dòng)作電流

Iop。(4)電流繼電器動(dòng)作后，均勻地減小調(diào)壓器的輸出電壓至繼電器的觸點(diǎn)剛剛分開(kāi)，指示燈熄滅，記下這時(shí)的電流，即為返回電流

Ire。AccordingtothesizeofthesettingcurrentIset,dialthesettinghandlearrowtothecorrespondingscale,turnoffthesingle-phasepowerswitchS,slowlyanduniformlyadjusttheoutputvoltageofthevaritran,sothattherelaycurrentslowlyincreasesuntiltherelayoperatesandindicatorlights,thenstopregulating.Notedownthevalueofthecurrentatthistime,namelytheoperatingcurrentIopoftherelay.Afterthecurrentrelayoperates,uniformlyreducetheoutputvoltageofthevaritranuntilthecontactsoftherelayjustseparat,theindicatorlightgoesout,andnotedownthecurrentatthistime,namelythereturncurrentIre.04實(shí)驗(yàn)方法Experimentalmethod(5)把單相接觸調(diào)壓器調(diào)至零位，拉開(kāi)單相電源開(kāi)關(guān)S。(6)動(dòng)作值與返回值的測(cè)量應(yīng)重復(fù)三次，將其填入表中，求出它們的平均值。Setthesinglephasevaritrantozeroandturnonthesingle-phasepowerswitchS.Themeasurementsoftheoperatingandreturnvaluesshouldberepeatedthreetimes,andtheiraveragevaluesshouldbeobtainedbyfillinginthetable.04實(shí)驗(yàn)方法Experimentalmethod動(dòng)作值與返回值的測(cè)量應(yīng)重復(fù)三次，將其填入表中，求出它們的平均值。根據(jù)動(dòng)作電流和返回電流計(jì)算返回系數(shù)及其它參數(shù)值。整定值(A)Settingvalue(A)線圈連接方式Coilconnectionmode動(dòng)作電流Iop(A)OperatingcurrentIop(A)返回電流Ire(A)ReturncurrentIre(A)返回系數(shù)KreReturncoefficientKre誤差(%)Error(%)一二三平均一二三平均

Measurementofoperatingandreturnvaluesshouldberepeatedthreetimesandfilledintothetabletofindouttheiraverag