Rev.DateCompiledbyReviewApprovalWorkInstructionforGeneratorHVWithstandTestDocumentNoKTPP-0-SEPS-COM-WI-4009PROJECT4x350MWKamalangaThermalPowerProjectOWNERGMR卡瑪朗加能源有限公司GMRKAMALANGAENERGYLIMITEDOWNER’sENGINEER拉瑪雅國(guó)際咨詢有限公司LAHMEYERINTERNATIONAL(INDIA)PVT.LTD.CONSULTINGENGINEERS,GURGAONEPCCONTRACTOR山東電力基本建設(shè)總公司SEPCOELECTRICPOWERCONSTRUCTIONCORPORATIONSUBCONTRACTOR工程概況Briefintroductionoftheproject卡瑪朗加火力發(fā)電廠由GMR能源有限公司在現(xiàn)場(chǎng)興建，該位置位于印度奧里薩邦德赫克納爾區(qū)。該項(xiàng)目為新建工程，包括四臺(tái)機(jī)組，每臺(tái)機(jī)組容量為350MW。本工程采用東方電機(jī)股份有限公司生產(chǎn)的三相發(fā)電機(jī)，額定功率350MW，功率因數(shù)0.85，端電壓20kV，頻率50Hz，轉(zhuǎn)速為3000rpm。汽輪發(fā)電機(jī)采用水-氫-氫冷卻方式。TheKamalangaThermalPowerStationwouldbesetupbyGMRkamalangaEnergyLimitedatasite,whichfallsundertheDhenkanaldistrictofOrissa,India.TheprojectisaGreenfieldprojectconsistingoffourunitseachof350MW.Thegeneratorsproposedfortheplantareofthreephase,manufacturedbyDFEM,withtheratedpowerof350MW,powerfactorof0.85lagging,terminalvoltageof20kV,frequencyof50Hzandspeedof3000rpm.Theturbinegeneratoradoptsthetypicalwater-hydrogen-hydrogencoolingsystem.編制依據(jù)Referencesofthecompilation下列文件中的條款通過本作業(yè)指導(dǎo)書的引用而成為本作業(yè)指導(dǎo)書的條款。Theprescriptionsinthedocumentslistedbelowareincludedinthisworkinstructionbyquotation.2.1）GB50150-2006電氣設(shè)備交接試驗(yàn)標(biāo)準(zhǔn)；GB50150-2006Standardforhand-overtestofelectricequipment;2.2)DL5009.1-2002電力建設(shè)安全工作規(guī)程DL5009.1-2002Safetyworkregulationsofelectricpowerconstruction2.3）QFSN-300-2-20型汽輪發(fā)電機(jī)安裝說明書QFSN-300-2-20Turbinegeneratorinstallationmanual試驗(yàn)項(xiàng)目及程序Testingitemsandprogress3.1）試驗(yàn)項(xiàng)目Testingitems）定子繞組的絕緣電阻、吸收比、極化指數(shù)測(cè)量。MeasurementofIR、Absorptance、Polarizationindexofstatorwinding.）定子繞組端部現(xiàn)包絕緣施加直流電壓測(cè)量。DCHVtestofgeneratorstatorwindingoverhanghandmadeinsulation.）定子繞組直流耐壓試驗(yàn)和泄漏電流測(cè)量。StatorwindingDCHVtestandmeasurementofleakagecurrent.）定子繞組交流耐壓試驗(yàn)。ACHVtestofstatorwinding.3.2）試驗(yàn)程序Testprogram）試驗(yàn)開始之前詳細(xì)記錄試品的銘牌參數(shù)，檢查、了解試品的狀態(tài)，并進(jìn)行記錄。Recordtheparametersonnameplateindetailsbeforetest,inspecttheconditionofthematerialsbeingtested,andmakerecords.）按先低壓試驗(yàn)后高壓試驗(yàn)、先直流后交流的順序進(jìn)行試驗(yàn)。在絕緣電阻測(cè)量無(wú)異常后再進(jìn)行耐壓試驗(yàn)。交流耐壓試驗(yàn)后重復(fù)測(cè)試絕緣電阻，以判斷耐壓試驗(yàn)前后試品的絕緣有無(wú)變化。TheLVtestshallbecarriedoutpriortoHVtest,andDCtestshallbecarriedoutbeforeACtest.Thewithstandvoltagetestshallbecarriedoutaftermeasuringtheinsultedresistance.TesttheinsultedresistanceagainafterACwithstandvoltagetest,soastoknowthedifferenceofinsulatedstatusoftestedpiecesbeforeandaftertest.4.施工準(zhǔn)備Constructionpreparation4.1）水內(nèi)冷發(fā)電機(jī)專用絕緣電阻測(cè)試儀、溫度計(jì)、濕度計(jì)。SpecialIRtesterforwatercoolinggenerator、Thermometer、Hygrometer.4.2）直流高壓發(fā)生裝置。DChighvoltagegenerator.4.3）成套工頻交流耐壓裝置。PowerfrequencyACwithstandvoltagedevice.）試驗(yàn)變壓器高壓側(cè)額定電流In應(yīng)大于試品所需電流Ix，其中Ix可按下式估算：Ix=2πfCxUx≈2.5A（f—試驗(yàn)電源頻率50Hz，Cx—被試?yán)@組對(duì)地等效電容0.225*10-6F，Ux—試驗(yàn)電壓32800V）

Theratedcurrent

Inonhigh-voltagesideofthetesttransformer

shouldbegreaterthancurrentIxrequiredbythetestproduct

,

where

Ix

canbeestimatedasfollows:Ix=2πfCxUx≈2.5A

(f-test

powersupplyfrequency50Hz,Cx-trial

windingonequivalentcapacitanceof

0.225*10

-6

F

Ux-test

voltage

32800V)）試驗(yàn)變壓器，容量可按下式計(jì)算：S＞2πfCxUx2＞80kVA（f—試驗(yàn)電源頻率50Hz，Cx—被試?yán)@組對(duì)地等效電容0.225*10-6F，Ux—試驗(yàn)電壓32800V）Testtransformercapacitycanbecalculatedasfollows:

S>

2πfCxUx

2>

80kVA

(f-test

powersupplyfrequencyof

50Hz,Cx-trial

windingtogroundtheequivalentcapacitanceof0.225*10

-6

Fthe

Ux-test

voltage

32800V

)）調(diào)壓器，容量與試驗(yàn)變壓器匹配。Regulator,capacitymatchwiththetesttransformer.5．施工工藝流程Constructionprocess5.1）定子繞組的絕緣電阻、吸收比、極化指數(shù)測(cè)量。MeasurementofIR、Absorptance、Polarizationindexofstatorwinding.）測(cè)量并記錄環(huán)境溫度和濕度。

Measureandrecordtheambienttemperatureandhumidity.）將匯水管用導(dǎo)線引至試驗(yàn)場(chǎng)地，把匯水管所有引下線擰在一起，用萬(wàn)用表測(cè)量匯水管對(duì)地電阻，應(yīng)大于30kΩ。將匯水管引線接至專用兆歐表的屏蔽端子上。Leadingthecoolingwaterpipebywiretothetestsite,allofdeflectorsofcoolingwaterpipescrewedtogether;measurecoolingwaterpiperesistancetogroundwiththemultimeter,whichshouldbegreaterthan

30kΩ.

Leadingcoolingwaterpipeconductorstotheshieldterminalondedicatedmegger.）分相測(cè)量，每相繞組必須頭尾短接，并將非被試?yán)@組、轉(zhuǎn)子繞組接地。Takesub-phasemeasurements,eachphasewindingmustbeheadtotailbyshortjointandgroundthewindingnottobetestedandrotorwinding.）將地線端子用接地線和發(fā)電機(jī)外殼連接好，用絕緣把手將測(cè)試線接觸到被測(cè)量繞組的引出端頭上，開始測(cè)量，記錄15s、60s、600s的絕緣電阻值。Theearthterminalshallbeconnectedwiththegroundlineandthegeneratorcasing,useinsulatinghandletocontactthetestlinetotheleadingendoftheheadofthemeasuringwinding,startthemeasurement,recording

15s,60s,600s,

insulationresistancevalue.）各相絕緣電阻的不平衡系數(shù)≤2（不平衡系數(shù)=最大值/最小值）。Theunbalancefactorofinsulationresistanceofeachphase

≤2the

(unbalancedcoefficient

=

max

/

min).）吸收比≥1.6，極化指數(shù)≥2。Absorptionratio

≥

1.6,

polarizationindex

≥

2.5.2）定子繞組端部現(xiàn)包絕緣施加直流電壓測(cè)量。DCHVtestofgeneratorstatorwindingoverhanghandmadeinsulation.）用鋁箔將引線接頭現(xiàn)場(chǎng)包絕緣部位包裹嚴(yán)實(shí)。

Wrapthepackageinsulationpartsoftheleadingwirejointsatsitebyaluminumfoiltightly.）發(fā)電機(jī)三相繞組加直流電壓至20kV，用100MΩ電阻桿串微安表逐點(diǎn)測(cè)試包鋁箔的部位，同時(shí)記錄微安表的讀數(shù)。

Generatorthree-phasewindingsplustheDCvoltageto

20kV,

testpartsofaluminumfoilpointbypointwiththethe

100MΩ

resistorrodstringmicroammete,whilerecordingmicroammeterreadings.）根據(jù)U=IR，計(jì)算表面電位（U—表面電位，I—微安表的讀數(shù)，R—100MΩ）。Calculatedaccordingto

U=

IR,

thesurfacepotential

(U-surface

potential,

I-microammeter

readings,

the

R-100MΩ).）要求各點(diǎn)電壓≤1900V。

Voltage

ofeachpoint≤

1900V.5.3）定子繞組直流耐壓試驗(yàn)和泄漏電流測(cè)量。StatorwindingDCHVtestandmeasurementofleakagecurrent.）試驗(yàn)電壓為電機(jī)額定電壓的3倍（60kV）。轉(zhuǎn)子繞組在滑環(huán)處接地。發(fā)電機(jī)出口電流互感器二次繞組短路接地。埋置測(cè)溫元件在接線端子處電氣連接后接地。Thetestvoltageis

3

timestheratedmotorvoltage

(60kV).

Rotorwindinggetgroundedatsliprings.

Exportofgeneratorcurrenttransformersecondarywindingisshortedtoground.

Embeddedtemperaturemeasurementdevicesgetelectricalconnectedattheterminalsbeforegetgrounding.5.3.2)分相測(cè)量，每相繞組必須頭尾短接，并將非被試?yán)@組、轉(zhuǎn)子繞組接地。Takesub-phasemeasurements,eachphasewindingmustbeheadtotailbyshortjointandgroundthewindingnottobetestedandrotorwinding.5.3.3）試驗(yàn)電壓按每級(jí)0.5倍額定電壓分階段升高，每階段停留1min，并記錄泄露電流；在規(guī)定的試驗(yàn)電壓下，泄露電流應(yīng)符合下列規(guī)定：（1）各相泄露電流的差別不應(yīng)大于最小值的100%，當(dāng)最大泄露電流在20μA以下，根據(jù)絕緣電阻值和交流耐壓試驗(yàn)結(jié)果綜合判斷為良好時(shí)，各相間差值可不考慮；（2）泄露電流不應(yīng)隨時(shí)間延長(zhǎng)而增大；（3）泄露電流隨電壓不成比例地顯著增長(zhǎng)時(shí)，應(yīng)及時(shí)分析。Perlevelofthetestvoltageis

0.5

timestheratedvoltageinphaseselevated,eachstagestay

1min,

andrecordtheleakagecurrent;underspecifiedtestvoltage,leakagecurrentshouldmeetthefollowingrequirements:

(1)

theleakagecurrentofeachphaseofthe

100%ofthe

differenceshouldnotbegreaterthantheminimum,maximumleakagecurrentof20μA

orless,accordingtothevalueofinsulationresistanceandACvoltagetestresultstodetermineagoodall-whitedifferencemaynotbeconsidered;

(2)

leakagecurrentshouldnotbewiththetimeincreases;

(3)

withvoltagedisproportionatelysignificantincreaseinleakagecurrent,timelyanalysis.5.3.4）氫冷電機(jī)必須在充氫前或排氫后且含氫量在3%以下時(shí)進(jìn)行試驗(yàn)，嚴(yán)禁在置換氫氣過程中進(jìn)行試驗(yàn)。Hydrogen-cooledmotorbeforehydrogenchargingorrowofhydrogenandhydrogencontentbelow

3%

test,totesttheprocessofreplacementofhydrogenisstrictlyprohibited.5.3.5）水內(nèi)冷電機(jī)宜采用低壓屏蔽法（見圖1）。

Watercooledgeneratorshouldadoptthelow-pressuremethodofshielding(seeFigure1).5.4）定子繞組交流耐壓試驗(yàn)。ACHVtestofstatorwinding.）試驗(yàn)電壓為(1000+2Un)*0.8=32.8kV。水內(nèi)冷電機(jī)在通水情況下進(jìn)行交流耐壓試驗(yàn)，水質(zhì)應(yīng)合格；氫冷電機(jī)必須在充氫前或排氫后且含氫量在3%以下時(shí)進(jìn)行試驗(yàn)，嚴(yán)禁在置換氫氣過程中進(jìn)行試驗(yàn)。Testvoltage

(1000+2Un)*0.8=

32.8kV.

ACvoltagetestwatercooledmotorthroughthewater,thewaterqualityshouldbequalified;hydrogen-cooledmotorbeforehydrogenchargingorrowofhydrogenandhydrogencontentof

lessthan

3%

test,isstrictlyprohibitedintheprocessofreplacementofhydrogentrials.）試驗(yàn)前先進(jìn)行絕緣電阻和吸收比、直流泄漏等試驗(yàn)，各項(xiàng)試驗(yàn)合格后再進(jìn)行本項(xiàng)試驗(yàn)。試驗(yàn)后再進(jìn)行一次絕緣電阻和吸收比測(cè)量，比較試驗(yàn)前后的變化。Beforetestinsulationresistanceandabsorptionratio,DCleakagetest,thenthetestqualifiedforthetrials.

Thetestchangeintheinsulationresistanceandabsorptionmeasuring,comparingthebeforeandaftertest.）轉(zhuǎn)子繞組在滑環(huán)處接地。發(fā)電機(jī)出口電流互感器二次繞組短路接地。埋置測(cè)溫元件在接線端子處電氣連接后接地。水內(nèi)冷發(fā)電機(jī)匯水管接地。檢查試驗(yàn)電源、調(diào)壓器和試驗(yàn)變壓器正常。分相測(cè)量，每相繞組必須頭尾短接，并將非被試?yán)@組接地。按接線圖接線，保證所有實(shí)驗(yàn)設(shè)備、儀器儀表接線正確、指示正確（見圖2）。Rotorwindingslipringsatground.

Generatortheexportcurrenttransformersecondarywindingisshortedtoground.

Embeddedtemperaturemeasurementdevicesinthewiringterminalselectricalconnectiontoground.

Watercooledgeneratorsinkwaterpipeground.

Checktestnormalpowerregulatorandtesttransformer.Takesub-phasemeasurements,eachphasewindingmustbeheadtotailbyshortjointandgroundthewindingnottobetested.Wiringdiagramtoensurethatalllaboratoryequipment,instrumentationwiringiscorrect,correctinstructions.(seeFigure2)5.4.4）一切設(shè)備儀表接好后，在空載條件下調(diào)整保護(hù)間隙，其放電電壓在試驗(yàn)電壓的110%-120%的范圍內(nèi)。Allconnectedequipment,instrumentation,underno-loadconditionstoadjusttheprotectiongap,thedischargevoltageintherangeof

110%-120%

ofthetestvoltage.）升壓必須從零開始，升壓速度在40%試驗(yàn)電壓以內(nèi)可不受限制，其后應(yīng)均勻升壓，速度約每秒3%的試驗(yàn)電壓。升至試驗(yàn)電壓后維持1min。Boostmuststartfromscratch,boostspeedinlessthan

40%ofthe

testvoltagecanbeunrestricted,subsequentlyshouldbeuniformboostspeedofabout

3%

persecondofthetestvoltage.

Roseafterthetestvoltagetomaintain

1min.）將電壓降至零，拉開電源，該繞組試驗(yàn)結(jié)束。Thevoltagedropstozero,pullpowersupply,thewindingendofthetrial.6.施工注意事項(xiàng)Constructionnotices6.1）試驗(yàn)前，充分了解被試設(shè)備的廠家說明書及本措施，嚴(yán)格按照本措施施工。Beforetesting,tofullyunderstandthemanufacturer'sinstructions,andthemeasuresoftestequipment,constructioninstrictaccordancewiththemeasures.6.2）試驗(yàn)前對(duì)所有參加試驗(yàn)人員進(jìn)行詳細(xì)的安全、技術(shù)交底。

Alltoparticipateinthetrialpersonneldetailedsafetyandtechnicaltestsbeforethetest.6.3）試驗(yàn)時(shí)正確使用儀器、儀表，避免人為損壞儀器、儀表。Testtheproperuseofinstruments,meters,instruments,meterstoavoidman-madedamage.6.4）試驗(yàn)過程中及時(shí)正確地做好記錄。Duringthetestinatimelymannertherighttomakearecord.6.5）驗(yàn)設(shè)備周圍設(shè)圍欄，并有專人監(jiān)護(hù)，發(fā)電機(jī)出線側(cè)和中性點(diǎn)側(cè)應(yīng)派專人把守，防止無(wú)關(guān)人員誤入。Therequestmustsetupafencearoundthetestequipment,andtosupervisethegeneratoroutletsideandtheneutralsideshouldsendsomeoneguardedtopreventunrelatedpersonnelstrayed.

6.6）試驗(yàn)用電源開關(guān)要懸掛“試驗(yàn)專用，嚴(yán)禁亂動(dòng)”警示牌。Thewarningcardwhichissaying“Specialforuse,donotfiddlewithit”fromthepowerswitchusedfortest6.6)發(fā)電機(jī)試驗(yàn)應(yīng)有廠方人員現(xiàn)場(chǎng)技術(shù)指導(dǎo)。Thetestingofgeneratorshouldbeguidedbytheengineerofmanufacturer.7．安全和環(huán)保注意事項(xiàng)Safetyandenvironmentalprotectionnotices7.1）為保證人身和設(shè)備安全