EB1140STZa.docx

EB1140STZa.docx

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EB1140STZa

EVHA71/600100/EB1.140.S.TZ-a

TIAN-GUANGHVDCTRANSMISSIONPROJECTContractNo.:

CDEC-P97001H

IndexofRevisions

Rev.

Date

RevisedItems

Page

Remarks

0

30.09.2000

---

---

newissue

a

05.04.2002

changeswhilecommissioning;corrections

---

aftercommissioning

DC-Filters

Text11

Index:

1Introduction1-1

1.1GeneralInformation1-1

1.2DCFilters–GeneralDescription1-1

1.3DCFilterbankEquipment-Overview1-3

1.4Cubicles-Description1-6

1.4.1IGBTConverterCubicle+S11-6

1.4.2ElectronicSwitchCubicle+S21-7

1.4.3ControlandProtectionCubicle1-8

1.4.4ACDistributionCubicle+NE1（AuxiliaryPowerSupplyCubicle）1-9

1.4.5AirConditioning+UT11-9

2Controlandprotection2-1

2.1ProtectionofthePassivePart2-1

2.2Control+ProtectionoftheActivePart2-2

2.2.1ControlSystemoftheActivePart2-2

2.2.2ProtectionoftheActivePart2-4

3SafetyInstructions3-1

ListofTables:

Table1.21:

ListofDCfilterbanks1-2

ListofFigures:

Figure1.21:

DCfilterbanks-overview1-2

Figure1.31:

DCfilterpassivepartprimaryequipment（-Q3,–Q4onlyincaseofDCF3）1-3

Figure1.32:

DCfilteractivepartprimaryequipment1-4

Figure1.33:

ArrangementoftheequipmentintheDCfilterC+Pmodule1-5

Figure1.41:

MechanicalandelectricalarrangementintheIGBTconvertercubicle+S11-6

Figure1.42:

Mechanicalandelectricalarrangementintheelectronicswitchcubicle+S21-7

Figure1.43:

Mechanicalarrangementofthecontrolandprotectioncubicle+U11-8

Figure2.11:

DCfilterpassivepartprotectionscheme2-1

Figure2.21:

DCfilteractivepartcontrolscheme2-3

Figure2.22:

DCfilteractivepartprotectionscheme2-5

1Introduction

1.1GeneralInformation

Thison-sitetrainingmanualisashortintroductioninDCfilterequipmentanditscontrolandprotection.Everyitem,thatismentionedinthison-sitetrainingmanualisdescribedindetailintheoperationandmaintenancemanualslistedbelow.

∙EB3.7.1.6.TZ,OperationManual-LocalControlofActiveDCFilters

∙EB4.141.TZ,MaintenanceManual-DCFilterCapacitors

∙EB4.142.TZ,MaintenanceManual-DCFilterReactors

∙EB4.143.TZ,MaintenanceManual-DCFilterResistors

∙EB4.144.TZ,MaintenanceManual-DCFilterActivePart,incl.DCFilterProtection

∙EB4.510.TZ,MaintenanceManual-Arresters

∙EB4.645.TZ,MaintenanceManual-DCFilterCTs

Thison-sitetrainingmanualwillnotdealwithDCdisconnect-andgroundingswitches.Thissubjectisdescribedintheon-sitetrainingmanualbelongingtodisconnectandgroundingswitches.

Thison-sitetrainingmanualwillnotdealwithanymeasuringdeviceoutsidetheDCfilterdesignationlocation.Thissubjectisdescribedintheon-sitetrainingmanualbelongingtotheseitems.

1.2DCFilters–GeneralDescription

FortheTianGuangHVDCTransmissionProjectsixDCfilterbanksareprovided.Oneverysitethreefiltersarelocated.Twoofthethreefilterbanksarethestandardfilters,oneforeachpole.Thethirdfilterisredundant.Itcanberemoteswitchedtothedesiredpolebytheoperator.

AllthreeDCfilterbanksareequippedwithcomponentsofsameratings,soallthebankscanbeseenaselectricallysame.Eachfilterbankconsistsofadoubletunedpassivepartandaremovableactivepartthatistunedforsomeselectedharmonics.Tousethedcfilterwithorwithouttheactivepartithastobeconfiguredpriortoinsertion.

EachfilterbankisequippedwithitsownC+Pmodule.Thismoduleisalso,apartfromtheswitchingdevices,thehousingforthecomponentsoftheactivepart.

Table1.21liststheDCfilterbanksbylocationdesignations.

Tian

Guang

FilterBank

ActivePart

FilterBank

ActivePart

=11B03

=11GF03

=21B03

=21GF03

DCF1-Pole1

=12B04

=12GF04

=22B04

=22GF04

DCF2-Pole2

=10B05

=10GF05

=20B06

=20GF06

DCF3-Pole1orPole2

Table1.21:

ListofDCfilterbanks

Figure1.21showsthearrangementoftheDCfilterbanks.

Figure1.21:

DCfilterbanks-overview

1.3

DCFilterbankEquipment-Overview

TheDCfilterpassivepartprimaryequipmentconsistsofthecomponentslistedbelow:

∙capacitors–C1and–C2

∙reactors–L1and–L2

∙resistor–R1

∙arresters–F1and–F2

∙currenttransformers–T1,-T2and–T11

∙disconnectors–Q1,-Q2（and–Q3,–Q4incaseoftheredundantfilterbankDCF3）

∙groundingswitches-Q51and-Q52

Figure1.31givesanoverview.

Figure1.31:

DCfilterpassivepartprimaryequipment（-Q3,–Q4onlyincaseofDCF3）

TheDCfilteractivepartprimaryequipmentconsistsofthecomponentslistedbelow:

∙autotransformer-T101（MVroom）

∙IGBTconverter（IGBTconvertercubicle+S1）

∙voltagetransformer–T5（IGBTconvertercubicle+S1）

∙currenttransformer–T1（IGBTconvertercubicle+S1）

∙electronicswitch-S2（electronicswitchcubicle+S2）

∙IGBTconvertertransformer–T11（MVroom）

∙HFfiltercapacitor–C1（MVroom）

∙arrester–F1（MVroom）

∙bypassswitch–Q6（outdoorequipment）

∙disconnector–Q9（outdoorequipment）

∙groundingswitch–Q8（outdoorequipment）

Figure1.32givesanoverview.

Figure1.32:

DCfilteractivepartprimaryequipment

TheDCfilterC+Pmoduleisdividedintotwocompartmentswhichformthecontrolroomincludingallcubicles,andthemediumvoltageroom.

Thecontrolroomcomprisesthecomponentslistedbelow:

∙auxiliarypowersupplycubicle+NE1

∙IGBTconvertercubicle+S1

∙electronicswitchcubicle+S2

∙C+Pcubicle+U1

∙aircondition+UT1

Themediumvoltageroomcomprisesthecomponentslistedbelow:

∙IGBTconvertertransformer–T11

∙HFfiltercapacitor–C1

∙arrester–F1

∙autotransformer–T101

Thewallbushings–Z1and–Z2connecttheindoorequipmentwiththeoutdoorsswitchingdevices.Figure1.33showsasketchoftheequipmentarrangement.

Figure1.33:

ArrangementoftheequipmentintheDCfilterC+Pmodule

1.4Cubicles-Description

ThissectiongivesanindividualdescriptionofthecubicleslocatedintheDCFilterModule.

1.4.1IGBTConverterCubicle+S1

TheIGBTconverterishousedinaStandard8MFSIEMENScubicle.Inadditionthecubiclehasarooftopwithfansforforcedcooling.The（main）componentsdescribedinthefollowingareinstalled:

∙semi-controlledthree-phasethyristor/diodebridge（3units–A41,-A43,-A45）:

rectifierfor490 VACpowersupply

∙PCCmodule–A4:

pre-chargecontrolboardfortherectifier

∙DClinkcapacitor（10cans-C1…-C10）:

stabilisestheDCvoltageproducedbytherectifier

∙voltagetransformer–T5:

measurestheDClinkvoltage

∙single-phaseinverter（4x2IGBT–V11,-V12,–V21,-V22,–V31,-V32,–V41,-V42）:

producestheoutputvoltagefromtheDClinkvoltage

∙PICANSTmodule-A3:

IGBTfiringcircuitmodule

∙currenttransformer–T1:

measuresthecurrentthroughtheIGBTs

∙PICADAmodule–A100:

signalinterfacecircuitboard.

Figure1.41:

MechanicalandelectricalarrangementintheIGBTconvertercubicle+S1

TheIGBTConverterCubicleisfedfromtheAutotransformer–T101with500VAC.Thisvoltageisrectifiedandtheresulting2*500VAC700VDCisstabilisedintheDClinkcapacitor.ControlledbytheC+Pcubicle+U1theIGBTinverterproducesfromtheDClinkvoltagetheoutputvoltagerequiredtoreducetheharmonicsintheDCtransmissionline.

1.4.2ElectronicSwitchCubicle+S2

TheelectronicswitchishousedinhousedinaStandard8MFSIEMENScubicle.Itisrealisedwithamodified3phaseSITORthyristorassembly（Series6QG35）ofSIEMENSmanufacturing.Theoriginalsurgesuppressercircuitofeachthyristorpairhasbeenremovedandanewcircuit（commonforallthreethyristorpairs）hasbeenestablishedinthecubiclebelowtheSITORassembly.

Twothyristorpairsareusedfornormaloperation.Inadditionapassivethyristor-firingmoduleisinstalled.Thisisconnectedtothethirdthyristorpair.IncasemalfunctionofthecontroloftheSITORand/ortheIGBTconverteranovervoltageoftheDClinkoftheIGBTconvertercanoccur.AnovervoltagedetectioncircuitattheDClinktriggersthispassivethyristor-firingmodule.ItwillbypasstheIGBTconverterbyfiringthethirdthyristorpairbeforeanimpermissibleharmfulovervoltageisreached.

PleasenotethattheSITORassemblyhasbeenmodifiedandthereforenotallinformationwithintheoperationmanualisvalid.The（main）installedcomponentsarelistedbelow:

∙modified3phaseSITORthyristorassembly–S2

∙controlledthyristorfiringmodule–A10

∙passivethyristorfiringmodule–A20

∙fanunit–E1

∙mountingplate–A1forsurgesuppressingcomponents–C1,-C2,-C3,-R1,-R2

∙surgesuppressingcomponent–L1

Figure1.42:

Mechanicalandelectricalarrangementintheelectronicswitchcubicle+S2

TheelectronicswitchisconnectedtotheoutputvoltageterminalsoftheIGBTconvertercubicle+S1andtheLVsideoftheIGBTconvertertransformer–T11.DuringinsertandremovesequenceoftheactivepartandwhiletheactivepartisinsertedbuttheIGBTinverterisnotoperatingbecauseofanyreason,theelectronicswitchisfired.Sothecurrentinthelowvoltagesideoftheactivepartisflowingthroughtheelectronicswitch.ThisprotectstheIGBTinverterfromovercurrents.

1.4.3ControlandProtectionCubicle

TheDCfilterprotectionandtheactivepartcontrolarehousedinadoublesizeStandard8MFSIEMENScubicle.TheC+Pisrealisedwiththemulti-microprocessorsystemSIMADYND.Thesystemsareinstalledinseparatesidesofthedoublesizecubicleandareelectricallyandmechanicallydecoupledenablingrepairsinafaultysystemwithoutdisturbingthehealthysystem.

Figure1.43:

Mechanicalarrangementofthecontrolandprotectioncubicle+U1

-A1,-A2RacksofSimadyn D

+.C,+.HMeasuringcircuit