《水力发电厂水力机械辅助系统流量监视测量技术规程》（NB／T 10144-2019）英文版

ICS27.140

P59

ENERGYSECTORSTANDARD

OFTHEPEOPLE’SREPUBLICOFCHINA

中华人民共和国能源行业标准

PNB/T10144-2019

TechnicalSpecificationforFlowMonitoringandMeasuringof

Hydraulic-MechanicalAuxiliarySysteminHydroelectricPowerPlants

水力发电厂水力机械辅助系统流量监视测量技术规程

IssuedonJune4,2019ImplementedonOctober1,2019

IssuedbyNationalEnergyAdministrationofthePeople’sRepublicofChina

Introduction

ThisEnglishversionisoneofChina’senergysectorstandardseriesinEnglish.Itstranslation

wasorganizedbyChinaRenewableEnergyEngineeringInstituteauthorizedbyNational

EnergyAdministrationofthePeople’sRepublicofChinaincompliancewithrelevant

proceduresandstipulations.ThisEnglishversionwasissuedbyNationalEnergy

AdministrationofthePeople’sRepublicofChinainAnnouncement[202x]No.xdatedxxxx,

202x.

ThisversionwastranslatedfromtheChineseStandardNB/T10144-2019,Technical

SpecificationforFlowMonitoringandMeasuringofHydraulic-MechanicalAuxiliarySystem

inHydroelectricPowerPlants,publishedbyChinaWater&PowerPress.Thecopyrightis

reservedbyNationalEnergyAdministrationofthePeople’sRepublicofChina.Intheevent

ofanydiscrepancyintheimplementation,theChineseversionshallprevail.

Manythanksgotothestafffromtherelevantstandarddevelopmentorganizationsandthose

whohaveprovidedgenerousassistanceinthetranslationandreviewprocess.

ForfurtherimprovementoftheEnglishversion,anycommentsandsuggestionsarewelcome

andshouldbeaddressedto:

ChinaRenewableEnergyEngineeringInstitute

No.2Beixiaojie,Liupukang,XichengDistrict,Beijing100120,China

Website:

Translatingorganizations:

POWERCHINABeijingEngineeringCorporationLimited

ChinaRenewableEnergyEngineeringInstitute

Translatingstaff:

Reviewpanelmembers:

NationalEnergyAdministrationofthePeople’sRepublicofChina

I

翻译出版说明

本译本为国家能源局委托水电水利规划设计总院按照有关程序和规定，统一组织翻

译的能源行业标准英文版系列译本之一。202x年x月x日，国家能源局以202x年第x

号公告予以公布。

本译本是根据中国水利水电出版社出版的《水力发电厂水力机械辅助系统流量监视

测量技术规程》NB/T10144—2019翻译的，著作权归国家能源局所有。在使用过程中，

如出现异议，以中文版为准。

本译本在翻译和审核过程中，本标准编制单位及编制组有关成员给予了积极协助。

为不断提高本译本的质量，欢迎使用者提出意见和建议，并反馈给水电水利规划设

计总院。

地址：北京市西城区六铺炕北小街2号

邮编：100120

网址：

本译本翻译单位：中国电建集团北京勘测设计研究院有限公司

本译本翻译人员：

本译本审核人员：

国家能源局

II

AnnouncementofNationalEnergyAdministration

ofthePeople’sRepublicofChina

[2019]No.4

NationalEnergyAdministrationofthePeople’sRepublicofChinahasapprovedandissued

297sectorstandardssuchasCodeforElectricalDesignofPhotovoltaicPowerProjects,

including105energystandards(NB),168electricpowerstandards(DL),and24

petrochemicalstandards(NB/SH).

Attachment:DirectoryofSectorStandards

NationalEnergyAdministrationofthePeople’sRepublicofChina

June4,2019

Attachment:

DirectoryofSectorStandards

Adopted

SerialReplacedApproval

StandardNo.TitleinternationalImplementationdate

numberstandardNo.date

standardNo.

…

TechnicalSpecification

forFlowMonitoringand

Measuringof

NB/T

17Hydraulic-Mechanical2019-06-042019-10-01

10144-2019

AuxiliarySystemin

HydroelectricPower

Plants

…

III

Foreword

AccordingtotherequirementsofDocumentGNKJ[2015]No.12issuedbyNationalEnergy

AdministrationofthePeople’sRepublicofChina,“NoticeonReleasingtheDevelopmentand

RevisionPlanoftheSecondBatchofEnergySectorStandardsin2014”,andafterextensive

investigationandresearch,summarizationofpracticalexperience,consultationofrelevant

Chinesestandards,andwidesolicitationofopinions,thedraftinggrouphaspreparedthis

specification.

Themaintechnicalcontentsofthisspecificationinclude:generalrequirementsofflow

monitoringandmeasuring,selectionofmonitoringpoints,selectionofflowcomponents,and

layoutandinstallationrequirementsofpipes.

NationalEnergyAdministrationofthePeople’sRepublicofChinaisinchargeofthe

administrationofthisspecification.ChinaRenewableEnergyEngineeringInstitutehas

proposedthisspecificationandisresponsibleforitsroutinemanagement.EnergySector

StandardizationTechnicalCommitteeonHydropowerHydraulicMachineryisresponsiblefor

theexplanationofspecifictechnicalcontents.Commentsandsuggestionsinthe

implementationofthisspecificationshouldbeaddressedto:

ChinaRenewableEnergyEngineeringInstitute

No.2Beixiaojie,Liupukang,XichengDistrict,Beijing100120,China

Chiefdevelopmentorganization:

POWERCHINABeijingEngineeringCorporationLimited

Participatingdevelopmentorganizations:

BeijingWanruidaMonitoringTechnologyCo.

ChinaThreeGorgesCorporation

Chiefdraftingstaff:

GOUDongmingYIZhongyouZHOUZhenzhongZHENGDongfei

LIUWanjingLIWenxueLIShihongWANGYuhui

GUOXibingZHANGHaoshengZHURushaHUANGYu

LIUGongmeiYAOZengmin

Reviewpanelmembers:

DAIKangjunYOUChaoYUANLianjunFUGuofeng

ZHANGQiangJIANGDengyunLIYuebinWUSaibo

WANGJianhuaCHENDongYANGJiamingQINDaqing

SHAOBao’anPENGShuojunDUGang

IV

Contents

1GeneralProvisions.................................................................................................................................1

2Terms.......................................................................................................................................................2

3GeneralRequirementsofFlowMonitoringandMeasuring..............................................................3

4SelectionofMonitoringPoints..............................................................................................................5

5SelectionofFlowComponents..............................................................................................................7

6LayoutandInstallationRequirementsofPines..................................................................................9

ExplanationofWordinginThisSpecification........................................................................................10

ListofQuotedStandards...........................................................................................................................11

V

1GeneralProvisions

1.0.1Thisspecificationisformulatedwithaviewtostandardizingtheflowmonitoringand

measuringofhydraulic-mechanicalauxiliarysysteminhydroelectricpowerplants,toimprovethe

levelofsafeandeconomicoperation.

1.0.2Thisspecificationisapplicabletotheflowmonitoringandmeasuringof

hydraulic-mechanicalauxiliarysysteminhydroelectricpowerplants.

1.0.3Theflowmonitoringandmeasuringofhydraulic-mechanicalauxiliarysystemin

small-sizedhydroelectricpowerplantsmaybesimplifiedonthebasisofthisspecification.

1.0.4Thisspecificationspecifiesthegeneralrequirements,selectionofmonitoringpoints,

selectionofflowcomponents,andlayoutandinstallationrequirementsofpipesforflow

monitoringandmeasuringofhydraulic-mechanicalauxiliarysysteminhydroelectricpower

plants.

1.0.5Inadditiontothisspecification,theflowmonitoringandmeasuringof

hydraulic-mechanicalauxiliarysysteminhydroelectricpowerplantshallcomplywithother

currentrelevantstandardsofChina.

1

2Terms

2.0.1flowcomponents

flowmonitoringandmeasuringdevicesuchasflowmeterorflowswitch

2.0.2flowmeter

deviceformonitoringthefluidflowvaluewithinthepipe.Theflowmeterscanbeclassifiedinto

electromagneticflowmeter,ultrasonicflowmeter,mechanicalflowmeter,differentialpressure

flowmeter,etc.dependingonthemeasuringmode;andcanbeclassifiedintoplug-inflowmeter,

flange-connectedflowmeter,etc.dependingontheinstallationmode

2.0.3flowswitch

componentformonitoringtheflowvalueandcomparingwithsetvalue,whichcanoutputsignals

whentheflowishigherorlowerthanacertainsetvalue.Flowswitchcanbeclassifiedinto

thermalflowswitch,mechanicalflowswitch,etc.

2

3GeneralRequirementsofFlowMonitoringandMeasuring

3.0.1Thefunctionsofmonitoringandmeasuringofeachpartshallmeetthefollowing

requirements:

1Theflowcomponentsshallbemountedinthecoolingwatermainoutletpipesfor

turbine-generatorunitandmaintransformerrespectively,whichshallmonitortheflowof

thepointandoutputtheanalogsignalordigitalsignal.

2Theflowcomponentsshouldbemountedatpumpoutlet,whichoutputtheswitching

signal,switchingplusanalogsignals,orswitchingplusdigitalsignals.

3Theflowcomponentsshallbemountedincooleroutletpipeandmainfirefightingpipe,

whichoutputtheswitchingsignal,switchingplusanalogsignals,orswitchingplusdigital

signals.

4Theflowcomponentsshallbemountedinthewatersupplypipesformainshaftsealand

labyrinthring,whichoutputtheswitchingsignal,switchingplusanalogsignals,or

switchingplusdigitalsignals.

5Theflowcomponentsshallbemountedinthewatersupplypipeforequipmentlubrication,

whichoutputtheswitchingsignal,switchingplusanalogsignals,orswitchingplusdigital

signals.

6Theflowcomponentsshallbemountedintheoilpipeforexternalcirculationsystem,

whichoutputtheswitchingsignal,switchingplusanalogsignals,orswitchingplusdigital

signals.

3.0.2Thealarmvalueandshutdownvalueofflowmonitoringandmeasuringshouldmeetthe

followingrequirements:

1Thelowalarmvalueofwaterflowineachcooleroutletpipeshouldbedeterminedby

equipmentmanufacturer,andshouldnotbelessthan70%ofthedesignflowifnot

specifiedbythemanufacturer.

2Thelowalarmvalueofwaterflowatpumpoutletpipeshouldnotbelessthan70%ofthe

designflow.

3Thelowalarmvalueandshutdownvalueofoilpipeinbearinglubricationpipefor

tubularunitshouldbedeterminedbyequipmentmanufacturer,Ifnotspecifiedbythe

manufacturer,thelowalarmvalueshouldnotbelessthan70%ofthedesignvalueand

theshutdownvalueshouldnotbelessthan50%ofthedesignvalue.

4Thelowalarmvalueandshutdownvalueofwatersupplyflowformainshaftsealshould

bedeterminedbyequipmentmanufacturer.Ifnotspecifiedbythemanufacturer,thelow

alarmvalueshouldnotbelessthan70%ofthedesignvalue,andtheshutdownvalue

shouldnotbelessthan50%ofthedesignvalue.

3.0.3Theswitchingsignal,analogsignalordigitalsignaloutputtedbyflowcomponentsshall

3

meettherequirementsofdataacquisitionbymonitoringandcontrolsystem.

3.0.4Theenvironmentinwhichtheflowcomponentsrunforlong-termshallcomplywiththe

currentsectorstandardDL/T1107,BasicSpecificationsofAutomaticComponentsfor

HydropowerPlant.

4

4SelectionofMonitoringPoints

4.0.1Theconfigurationofflowmonitoringpointsforunitauxiliarysystemshouldbein

accordancewithTable4.0.1.

Table4.0.1Configurationofflowmonitoringpointsforunitauxiliarysystem

Numberof

No.PositionFlowcomponent

monitoringpoints

CoolingwatermainoutletpipeforunitcoolingElectromagnetic

11

watersystemflowmeter

2Coolingwatersupplypipeformainshaftseal1Flowmeter

3Coolingwatermainoutletpipeforaircoolers1Flowswitch

Coolingwateroutletpipeforthrust-bearing

41Flowswitch

coolers

Coolingwateroutletpipeforupper-guide

51Flowswitch

bearingcoolers

Coolingwateroutletpipeforlower-guide

61Flowswitch

bearingcoolers

Coolingwateroutletpipeforturbineguide-

71Flowswitch

bearingcoolers

Coolingwatersupplypipeforupperlabyrinth

81Flowswitch

ring

Coolingwatersupplypipeforlowerlabyrinth

91Flowswitch

ring

Lubricationoilinletpipeforgeneratorguide

101Mechanicalflowmeter

bearingoftubularunit

Lubricationoilinletpipeforturbineguide

111Mechanicalflowmeter

bearingoftubularunit

Lubricationoilinletpipefortwo-direction

121Mechanicalflowmeter

thrustbearingoftubularunit

Outletpipeofexternalcirculationcoolersuchas

13lubricationoilforthrust-bearingcooler,1foreachMechanicalflowmeter

guide-bearingcooler,etc.

4.0.2Theconfigurationofflowmonitoringpointsforcommonauxiliarysystemshouldbein

accordancewithTable4.0.2.

5

Table4.0.2Configurationofflowmonitoringpointsforcommonauxiliarysystem

Numberof

No.PositionmonitoringFlowcomponent

points

Outletpipeofcoolingwatersupplypump,

11foreachFlowswitch

firefightingpump,etc.

Lubricatingwatersupplypipeofdeep-well

21foreachFlowswitch

pumpfordewateringsystem

3Outletpipeofdewateringpump1foreachFlowswitch

Lubricatingwatersupplypipeofdeep-well

41foreachFlowswitch

pumpforleakagedrainagesystem

Outletpipeofleakagedrainagepumpin

51foreachFlowmeter

undergroundpowerhouse

Coolingwatermainoutletpipeformain

61Electromagneticflowmeter

transformercoolers

Coolingwaterbranchoutletpipeformain

71foreachFlowswitch

transformercoolers

Lubricationoilmainpipeformain

81Mechanicalflowmeter

transformercoolers

Freezingwateroutletpipeofcold-waterunit

91Flowswitch

forairconditioningsystem

Coolingwateroutletpipeofcold-waterunit

101Flowswitch

forairconditioningsystem

Coolingwateroutletpipeforstatic

111Flowswitch

frequencyconvertercooler

Coolingwateroutletpipeforaircompressor

121foreachFlowswitch

coolers

Coolingwateroutletpipeofoilsumptank

131Flowswitch

coolerforoilpressuresupplysystem

6

5SelectionofFlowComponents

5.0.1Themechanicalflowmetermountedinoilsystempipeshouldbeequippedwithglass.The

flowmetermountedinoilpipeofexternalcirculationsystemformaintransformershallbe

anti-explosiontype.

5.0.2Theflowcomponentsshallmeetthefollowingbasictechnicalrequirements:

1Theflowcomponentsshallworkreliablywithstableperformanceandsimplestructure,

andbeeasyforinstallation,commissioningandmaintenance.

2Alarmsignalshallbesentoutwhentherateofflowenclosedinthepipereachesthe

presetvalue,andthepermissibleerrorbandis±5%.

3Thealarmvalueofflowshouldbeadjustablefrom25%to100%ofthefullscope.

4Theanalogoutputshouldbe4mAto20mA,andthesignalshouldbecurrenttype.

5.0.3Theelectromagneticflowmetershallmeetthefollowingrequirements:

1Theflowmetershallbeequippedwithdevicetodisplayinstantaneousflowrateand

accumulativeflowvolumelocally.

2Theflowmetershouldbeabletooutput4mAto20mAanalogsignalandtwoswitching

signals.

3Themeasurementaccuracyshouldnotbelowerthan2.5%offullscope.

4Themeasurementflowvelocityshallbe0m/sto8m/s.

5TheapplicablepipediametershouldbeDN25toDN1000.

6Thepowersupplyshouldbe24VDCor220VAC.

5.0.4Themechanicalflowmetershallmeetthefollowingrequirements:

1Thepressurelossshallbelessthan0.1m.

2Theflowmetershouldbeflange-connectedandbeeasyfordisassemblyandclean,and

canbeequippedwithaglass.

3Theflowmetershouldbeabletooutput4mAto20mAanalogsignalandtwoswitching

signals.

4Theoutputswitchingsignalshallbezerocorrespondingtomotionlesspressuredfluidin

thepipe,ornofluidinthepipe.

5Themeasurementaccuracyshouldnotbelowerthan2.5%offullscope.

6Themeasurementflowvelocityshallbe0m/sto8m/s.

7Thepowersupplyshouldbe24VDCor220VAC.

5.0.5Thethermalflowswitchshallmeetthefollowingrequirements:

7

1Themeasuringscopeandalarmvalueshouldbeadjustable.

2Theanti-scalingfunctionshallbepossessed.

3Theswitchshallreturntozerowhenthereispressurebutnoflowinthepipeorwhen

thepipeisempty.

4Themeasurementflowvelocityshallbe0m/sto3m/s.

5Theresponsetimeshouldbewithin2sto10s.

6Thepowersupplyshouldbe24VDCor220VAC.

8

6LayoutandInstallationRequirementsofPipes

6.0.1Theflowcomponentsshouldbemountedinthepositionfacilitatingforobservationandoperation.

6.0.2Theinstallationpositionofflowcomponentsshouldavoidhigh-intensitymagneticfieldorstrong

vibration.

6.0.3Forthepipeswithaccurateflowmeasurementrequirements,straightinletandoutletsections

shouldbeplacedinfrontofandbehindflowcomponents.Thelengthofstraightsectionsshouldmeet

followingrequirements:

1Fortheelectromagneticflowmeter,thelengthofinletsectionshouldnotbelessthan5timesthe

pipediameter,andthelengthofoutletsectionnot