SIWGPhase3Functionsv2.docx

SIWGPhase3Functionsv2.docx

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SIWGPhase3Functionsv2

Phase3FunctionsfromSIWGRecommendationsDocument

Theresultsofthe3-19-15surveyareshown.DERmanufacturers,implementers,andaggregatorswerecombined,sincemostaggregatorsarealsoimplementers.InthisTable,onlythemajorityvoteisshown（seethepdffilesfordetails）.Iftherewasnomajority,IindicatethetwoorthreehighestresultsasH-M,H-O,M-O,orH-M-O.Acoupleoffunctions（F-Wandconnect/disconnectDER）wereleftoutofthesurveybymistake.

AnumberofadditionalfunctionshavebeensuggestedandareaddedtotheendoftheTable.

Q#

Phase3DERFunctionswithCommunications

Description

CommunicationRequirements

Util

H/M/O

DER

H/M/O

Oth

H/M/O

Constraints&Comments

2

MonitorAlarms:

Provideemergencyalarmsandinformation

TheDERsystem（andaggregationsofDERsystems,suchasvirtualpowerplants）providesalarmsandsupportingemergencyinformationviatheFDEMStotheutility.ThisfunctionisfeasibleonlyiftheICTinfrastructureisavailable.

ICT:

DERsystemprovidesalarmsandemergencyinformationtoutilityand/orREP

H

O

H

LargerDERsormultipleDERswithinafacility

3

MonitorDERStatusandOutput:

Providestatusandmeasurementsoncurrentenergyandancillaryservices

TheDERsystem（andaggregationsofDERsystems,suchasvirtualpowerplants）providescurrentstatus,powersystemmeasurements,andotherreal-timedata（possiblyaggregatedviatheFDEMS）totheutility,inordertosupportreal-timeandshort-termanalysisapplications.ThisfunctionisfeasibleonlyiftheICTinfrastructureisavailable.（Revenuemeteringdataisprovidedviaalternatemeans.）

ICT:

DERsystemprovidesstatusandmeasurementvaluestoutilityand/orREP

H

H

H

LargerDERsormultipleDERswithinafacility

4

LimitMaximumRealPower:

LimitmaximumrealpoweroutputatanECPorthePCCuponadirectcommandfromtheutility

TheutilityissuesadirectcommandtolimitthemaximumrealpoweroutputattheECPorPCC.Thereasonmightbethatunusualoremergencyconditionsarecausingreverseflowintothefeeder’ssubstationorbecausethetotalDERrealpoweroutputonthefeederisgreaterthansomepercentageoftotalload.ThecommandmightbeanabsolutewattvalueormightbeapercentageofDERoutput.ThisfunctionisfeasibleonlyiftheICTinfrastructureisavailable.ItmightalsobeusedtoensurefairnessacrossmanyDERsystems.

Autonomous

Local:

MonitorrealpoweroutputatPCC

ICT:

UtilityissuesacommandtolimittherealpoweroutputattheECPorPCC

H

H

O

LargerDERsorlargegroupsofDERswhereICTcapabilitiesareavailable

5

ScheduleOutputatPCC:

Scheduleactualormaximumrealpoweroutputatspecifictimes

Theutilityestablishes（orpre-establishes）aschedule（e.g.on-peak&off-peak）ofactualormaximumrealpoweroutputlevelsattheECPorPCC,possiblycombininggeneration,storage,andloadmanagement.Thereasonmightbetominimizeoutputduringlowloadconditionswhileallowingorrequiringhigheroutputduringpeakloadtimeperiods.

Autonomous

Local:

MonitorrealpoweroutputatECPorPCC.

ICT:

Utilityupdatesthescheduleofactualormaximumrealpowervalues

H

O

H-O

LargerDERsormultipleDERswithinafacility

Frequency-Watt:

Counteractfrequencyexcursionsbeyondnormallimitsbydecreasingorincreasingrealpower

TheDERsystemreducesrealpowertocounteractfrequencyexcursionsbeyondnormallimits（andviceversaifadditionalgenerationorstorageisavailable）,particularlyformicrogrids.HysteresiscanbeusedasthefrequencyreturnswithinthenormalrangetoavoidabruptchangesbygroupsofDERsystems.

Autonomous

Local:

Monitorvoltageanomalies

ICT:

Utilityupdatesfrequencyresponsesettings

H

H

H

AllDERsystemsbutmaynotalwaysbeactivated

（Leftoutofsurveybymistake）

6

Voltage-Watt:

Modifyrealpoweroutputautonomouslyinresponsetolocalvoltagevariations

TheDERsystemmonitorsthelocal（orfeeder）voltageandmodifiesrealpoweroutputinordertodampvoltagedeviations.SettingsarecoordinatedbetweentheutilityandDERoperator.Hysteresisanddelayedresponsescouldbeusedtoensureoverreactionsorhuntingdonotoccur.

Autonomous

Local:

Monitorvoltage

ICT:

Utilitymodifiestherealpoweroutputsettings

H

M

M

AllDERsystemsbutmaynotalwaysbeactivated

7

DynamicCurrentSupport:

Counteractvoltageexcursionsbeyondnormallimitsbyprovidingdynamiccurrentsupport

TheDERsystemcounteractsvoltageanomalies（spikesorsags）through“dynamiccurrentsupport”.TheDERsystemsupportsthegridduringshortperiodsofabnormallyhighorlowvoltagelevelsbyfeedingreactivecurrenttothegriduntilthevoltageeitherreturnswithinitsnormalrange,ortheDERsystemrampsdown,ortheDERsystemisrequiredtodisconnect.

Autonomous

Local:

Monitorvoltageanomalies

ICT:

Utilityupdatesdynamiccurrentsettings

H

H

H

AllDERsystemsbutmaynotalwaysbeactivated

8

SetRealPower:

SetactualrealpoweroutputattheECPorPCC

TheutilityeitherpresetsorissuesadirectcommandtosettheactualrealpoweroutputattheECPorPCC（constantexport/importifloadchanges;constantwattsifnoload）.Thereasonmightbetoestablishabaseorknowngenerationlevelwithouttheneedforconstantmonitoring.Thisistheapproachoftenusedtodaywithsynchronousgenerators.ThisfunctionisfeasibleonlyiftheICTinfrastructureisavailable.Meterreadscouldprovide15-minuteenergybytheendofthedaycouldprovideproductioninformationforoperationalplanning.

Autonomous

Local:

MonitorrealpoweroutputatPCC.

ICT:

utilityissuesacommandtomodifytherealpoweroutputattheECPorPCCincludingforchargingordischargingstoragesystems

H

O

O

LargerDERsormultipleDERswithinafacility

9

InitiatePeriodicTests:

TestDERfunctionality,performance,softwarepatchingandupdates

InitialDERsoftwareinstallationsandlaterupdatesaretestedbeforedeploymentforfunctionalityandformeetingregulatoryandutilityrequirements,includingsafety.Afterdeployment,testingvalidatestheDERsystemsareoperatingcorrectly,safely,andsecurely.

Off-line,local,orICT:

（maybepriortoinstallationorhandledlocally）TestDERsoftware

H

M

O

RecommendedforallDERsystems,usingappropriatetypesoftesting

CommandDERtoConnectorDisconnect:

Supportdirectcommandtodisconnectorreconnect

TheDERsystemperformsadisconnectorreconnectattheECPorPCC.TimewindowsareestablishedfordifferentDERsystemstorespondrandomlywithinthatwindowtothedisconnectandreconnectcommands.ThisfunctionisfeasibleonlyiftheICTinfrastructureisavailable.

ICT:

UtilityorFDEMSissuesdisconnectorreconnectcommand

M

RecommendedforallDERsystemsbutmaynotalwaysbeactivatedandwouldrequireICTcapabilities（Leftoutofsurveybymistake）

10

ProvideDERNameplateorAs-Builtinformation:

Provideoperationalcharacteristicsatinitialinterconnectionanduponchanges

TheDERsystemprovidesoperationalcharacteristicsduringinitialRule21screening,duringimplementation,orafterits“discovery”andwheneverchangesaremadetoitsoperationalstatus.

Off-lineorICT:

（maybepriortoinstallation）ProvideDERcharacteristicsinformationtoutility

O

M

H

RecommendedforallDERsystems.Sincecommunicationscapabilityismandatory,canbeaddedlater

11

ScheduleDERFunctions:

Schedulerealpowerandancillaryserviceoutputs

TheDERsystemreceivesandfollowsschedulesforrealpowersettings,reactivesettings,limits,modes（suchasautonomousvolt/var,frequency-watt）,andotheroperationalsettings.

Autonomous

ICT:

Utility,REP,orFDEMSissuesschedulestoDERsystem

H

O

M

RecommendedforallDERsystemsbutmaynotalwaysbeactivated

12

ScheduleStorage:

Setorschedulethestorageofenergyforlaterdelivery,indicatingtimetostartcharging,chargingrateand/or“charge-by”time

ForaDERsystemthathasstoragecapabilities,suchasbatterystorageoracombinedPV+storagesystemorafleetofelectricvehicles.Presettime-of-chargevaluescanbeestablished.SettingsarecoordinatedbetweentheutilityandDERoperator.Differentscenarioscouldinclude:

∙Lowloadconditionsatnightarecausingsomerenewableenergytobewasted,sochargingenergystorageDERsystemsatthattimemakespowersystemoperationsmoreefficient.

∙DERcontrollerchargesatthespecifiedrate（lessthanorequaltothemaximumchargingrate）untilthestate-of-charge（SOC）reachesaspecifiedlevel.

∙DERcontrollerchargesatthenecessaryrateinordertoreachthespecifiedSOCwithinthe“charge-by”time.

Autonomous

ICT:

Utilityupdatesthestoragesettingsand/orschedule

H-M-O

O

H

RecommendedforDERsystemswithstoragecapabilities

13

SmoothFrequencyDeviations:

Smoothminorfrequencydeviationsbyrapidlymodifyingrealpoweroutputtothesedeviations

TheDERsystemmodifiesrealpoweroutputrapidlytocounterminorfrequencydeviations.Thefrequency-wattsettingsdefinethepercentageofreal-poweroutputtomodifyfordifferentdegreesoffrequencydeviationsonasecondorevensub-secondbasis

Autonomous

Local:

Monitorfrequency

ICT:

Utilityupdatesthefrequency-wattsettings

H-M

O

H-O

RecommendedforallDERsystemsbutmaynotalwaysbeactivated

14

BackupPower:

Providebackuppowerafterdisconnectingfromgrid

TheDERsystem,includingenergystorageandelectricvehicles,hastheabilitytoproviderealpowerwhenthesiteisdisconnectedfromgridpower.Thereasonisforprovidingbackuppowertothefacilityandpossiblyblackstartcapabilities.

Autonomous

Local:

Monitorvoltage,frequency,andconnectedload

O

O

O

Decisio