welcome to the grid edge - energy networks australia

1

Welcome to the

Grid Edge MicroGrids, Distributed

Energy Precincts and Grid Edge innovation

May 2017

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INTRODUCTION 1

CycloneResponseusingCommunitybasedMicroGrids 2

Networksrenewed 4

UnitedEnergy,VirtualPowerPlantPilotProject 6

CONSORTBrunyIslandBatteryTrial 7

OnslowDistributedEnergyResources(DER)Project 9

EndeavourEnergySolarSaverResidentialBatteryEnergyStorageTrial 10

MooroolbarkCommunityMiniGrid 12

Stand-AlonePowerSystem(SPS)Pilot 14

UnitedEnergy,DynamicVoltageManagementSystemTrial 16

CrottyDamRemoteAreaPowerSupply 17

EndeavourEnergyGridBatteryEnergyStorageSystem(BESS)trial 18

EsperanceStandalonePowerSystemProject 20

SummerSaverProgram 21

CO

NT

EN

TS

1

INTRODUCTION

Australia’s energy system is undergoing a transformation with customers at the centre.

Solar,batterystorageandotherdistributedenergyresourcesarebecomingmoreefficientandaffordable.Thesetechnologiesarebeinginstalledbybothcustomersandenergybusinessesacrossthecountrywhileotheredgeofgridtechnologiesarealsodevelopingrapidly.Thesetechnologiesallowcustomerstoparticipateintheenergysystemlikeneverbefore,makingthemostoftheirsolarandbatteries,sellingservicesbacktothegridandbeingrewardfortheirenergyusechoices.

CommunitiesareincreasinglyseekingtoformMicroGridsorminigrids.Thesesystemsmayattimesbeself-sufficientorexchangeserviceswiththegridformutualbenefitwiththewidercommunity.

InremotecommunitiesisolatedMicroGrids,remoteareapowersuppliesandstandalonepowersystemsoftenprovetobemorereliableandcosteffectivethantraditionalservicedelivery.Theyprovidetheopportunitynotonlyforsomecustomerstoenjoymorereliableelectricity,buttoreducecosts,byalleviatingtheneedforcostlyinvestmentinnetworkaugmentationwhilealsoreducingbushfirerisks.

Theseedgeofgridtechnologiescanalsosupportresilienceandallowpowertoberestoredtocommunitiesmoreefficientlyafternaturaldisasters.

Usedeffectively,edgeofgridapplicationscanensurereliabilityofthegrid,maintainpowerqualityandhelpavoidcostlynetworkaugmentations.

Energynetworkbusinessarecommittedtoworkingwithcustomerstodevelopandbuildtheenergysystemofthefuture.Theyareinstallingandtriallingthesenewtechnologiesandeachprojectallowsthenetworkbusinesstobetterunderstandpotentialapplicationsandtheneedsofthecommunity.

ThispublicationhighlightsjustafewexamplesofhownetworkbusinessesfromaroundAustraliaareworkingwithcustomersandcommunities.Amoreinnovative,agileapproachcanhelpprovideAustraliancustomerswithaffordable,secureandcleanerenergyinanincreasinglydecentralisedanddynamicenergysystem.

2

Cyclone Response using Community based MicroGrids

In March 2017 Energy Queensland faced its first major challenge as a business when Tropical Cyclone Debbie wreaked havoc across more than half of Queensland’s east coast and there was significant damage caused to its Ergon and Energex distribution networks.

Atonepoint,almostaquarter-of-a-millionQueenslandcustomersacrossthemorethan1300sqkmswerewithoutpower.

ErgonEnergyandEnergex,aspartoftheEnergyQueenslandgroup,implementedarestorationplanthatwaseffective,inventiveandinnovative.

ErgonEnergyandEnergexteamsbeganaerialdamageassessmentswithin24hoursofTropicalCycloneDebbiecrossingthecoastintheWhitsundays.Within48hours,ElectricitySystemsDesignersandLinesPlannersweremappingoutMicroGridsolutionstorestorepoweruntilcommunitiescouldbeconnectedbygridsupply.

EnergyQueensland’stechnicalexpertiseandfieldexperienceenabledcrewstoresurrectabatteredandbrokennetworkandsupportitwithcommunity-basedMicroGridswhilelonger-termrepairsweremappedoutandundertakenintheworsthitareas.OneareawherethiswasparticularlysuccessfulwasthebeachsidecommunityofMidgePointwhichasaresultofinstallationofaPegasusunitandmicro-gridthecommunitywasabletostartrepairsandrecoverywellaheadoftheplannedgridsupplyrepairschedule.

ThefirststepwastorestoreGridsupplywherepossible.Wherethiswasn’tpossible,ErgonEnergydeployedandinstalledgenerationtosupportcriticalcommunityinfrastructureinlinewithLocalDisasterplanse.g.water/sewagepumps.

Thenextprioritywastorestorepowertothelargestnumberofcustomersasquicklyaspossible.Thisinvolvedrebuildingassetssuchaspowerlinesinlocalstreetsandrepairingdistributiontransformers,thenreconnectingindividualservicewirestohomesandbusinesses.

NETWORK BUSINESS

Ergon Energy

PROJECT LOCATION

North Queensland communities

between Mackay and Ayr

PROJECT PARTNERS & SUPPLIERS

ErgonEnergy,Energex,EssentialEnergy

(NSW)

PROJECT TIMING

March28–April142017

CONTACT

[email protected]

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Cyclone Response using Community based MicroGrids

ErgonEnergy’smobilegeneratorfleetisapproximately13.5MVAintotalcapacity.Thecurrentfleetincludes35lowvoltagegeneratorsranginginsizefrom33kVAto625kVA,withanadditionalsixcontainerisedlowvoltagemobile1250kVAunitsandfivePegasus1500kVAHVinjectionunits.TheseHVinjectionunitsarecapableofbeingdirectlyconnectedtoeithertheundergroundoroverhead11kVor22kVnetworks.

TheoperationalresponseincludedthedeploymentofPegasushighVoltagemobileinjectionunitsandothergeneratorstore-energisecommunitieswhileourcrewsrepairedthenetworkandrestoredpowerto65,000northQueenslandcustomersbetweenMackayandAyrwithintwoweeksofgettingaccesstotheimpactedarea.

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Networks Renewed

NETWORK BUSINESS

Essential Energy

PROJECT LOCATION

Collombatti and Bellingen, NSW


EssentialEnergy,ARENA,RepositPower,

UTS&SMAAustralia

FUNDING

ARENA,partnerorganisation

contributionsandEssentialEnergy’s

DemandManagementInnovation

Allowance(DMIA)

PROJECT TIMING

September2016–September2018

CONTACT

[email protected]

FURTHER INFORMATION

Collombatti:www.essentialenergy.com.

au/content/batterytrial

Bellingen:www.essentialenergy.com.au/

content/invertertrial

Essential Energy partners in battery storage/solar inverter trial in regional NSW

EssentialEnergyissigningupregionalNSWresidentstoparticipateinatrialtoassessthepotentialforcustomer-ownedbatterystoragesystemsandadvancedsolarinverterstohelpbettermanagedemandfornetworkcapacity.

InajointprojectwiththeAustralianRenewableEnergyAgency(ARENA),UniversityofTechnologySydney,RepositPowerandSMAAustralia,EssentialEnergywilltestbatterystoragesystemsandadvancedsolarinverterswitheligiblecustomersinatwo-yearpartiallysubsidisedtrial.

TheruraltownsofCollombatti,north-westofKempsey,andBellingen,south-westofCoffsHarbour,havebeenselectedforthetrialduetothehighconcentrationofsolarcustomersintheareaandthepotentialtoaddressanemergingnetworkconstraint.

Theproject’stwokeyobjectivesinclude:

» Developingasetofguidelinesforfutureuptaketoensuresuchtechnologyisoptimallyintegratedanddoesnotresultincostlynetworkexpenditure

» Exploringthepossiblevaluesuchtechnologycanprovideonaleastcostbasistoaddressnetworkconstraints

Systeminstallationswillbedeliveredintwoseparatestages,withthequantityoftheseinstallationsdependantonachievingtherequirednetworkbenefit.

Duringtheinitialpilotstage,upto40customerswillreceivesubsidisedinstallationofthebatterystoragesystemsoradvancedsolarinvertersandwillretainownershipoftheequipmentaspartofthetrial.Duringthetrialperiod,participantswillreceivepaymentsbasedonthelevelofnetworksupporttheirsystemprovides.

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Networks Renewed

Thetrialhasbeendesignedaroundanopenmarketapproach,maximisingcustomerchoice,emergingmarketparticipantsandthepotentialfutureenergymarket.Subsidieshavebeenusedtoreducesystemcoststodaycomparabletothatlikelytobeseenoverthenextfewyears.

Withintherapidlychangingenergyecosystem,thekeyobjectivesoftheprojectwillhelpEssentialEnergyoperateabestpracticebusinessinperformance,efficiency,offeringvaluetocustomerswhilemaintainingdownwardpressureonnetworkcharges.

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NETWORK BUSINESS

United Energy

PROJECT LOCATION

United Energy Distribution Network in

Melbourne


EnergyMakeovers,Sunverge,Tesla&

RepositPower

FUNDING

UnitedEnergy’sDemandManagement

InnovationAllowance

PROJECT TIMING

October2013-March2018

CONTACT

[email protected]

[email protected]

United Energy, Virtual Power Plant Pilot Project

Since October 2013 United Energy in Victoria has been undertaking a trial of Commercial and Residential Solar Storage Installations on the Distribution Network.

Aspartofthisproject,UnitedEnergyhasinstalled50kWofsolarphotovoltaic(PV)and150kWhofenergystorageacrossa10residentialcustomerpremisesand1commercial installationattheirBurwoodfielddepot

ThisprojectseekstoexploretheviabilityofutilisingsolarPVandenergystorageasanalternativetoinvestmentintraditionalnetworkinfrastructure.Itisdesignedto:

» BetterunderstandthecurrentstateofsolarPVandenergystoragetechnologyanditsabilitytoscale;

» DevelopanunderstandingoftheeconomicsofsolarPVandenergystorage;

» IdentifytherisksandtestthecontrolsfortheuseofsolarPVandenergystoragetechnologyinnetworksupportapplications;and

» ValidatetheuseofsolarPVandcontrolledenergystoragetechnologyforpeakdemandandvoltagemanagementapplicationsonthedistributionnetwork

UnitedEnergyhasselectedcustomerswithadifferentrangeofenergyusagepatternstoparticipateinthisproject.Theselectedconstrained(overloaded)assetswereidentified,wheretheuseofsolarPVandenergystoragetechnologywaslikelytobemoreeconomicthanthetraditionalaugmentationsolution.

UnitedEnergysuccessfullyprogrammedtheenergystoragesystemstoautomaticallyforecasthigh-temperaturedaysandprioritiseoperationofthesystemsfordispatchofenergyduringtheeveningpeak,whilstmanaginginternaltemperaturesoftheenergystorageunitsforoptimalperformance.UnitedEnergyhasexecutedthepeakdemandcontrolstrategyacrossarangeofenergystorageunitsinstalledinthefieldandfoundthatitisreliabletocalluponsolarPVandenergystoragetechnologyfornetworksupportandpeakdemandreductionapplicationswhenrequired.ThistrialprojectisstillongoingwithUnitedEnergyutilisingtheinstalledsolarstoragesystemstoexplorethesuitabilityofthetechnologyforvoltagemanagementapplications.

Aspartofthenextstepsforthisprogram,UnitedEnergywillseektocommencefurtherinstallationsofsolarPVandenergystoragesystemswithintheselectedconstrainedregionsofthedistributionnetworkinordertoprovethatthistechnologycanbecontrolledinconcerttodeferinvestmentsinactualplannedaugmentationprojects.

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CONSORT Bruny Island Battery Trial

TasNetworks Part of Exciting Three-Year Battery Trial

ForTasNetworks,customerownedbatteriesareanopportunitytoresolvenetworkproblemswithoutbuildingadditionalnetwork.Thisisparticularlytrueattheedgeofthegrid,wherebuildingmorenetworkisexpensive.

TheCONSORTBrunyIslandBatteryTrialisajointresearchanddevelopmentprojectthroughTasNetworks,batterycontrolsoftwarebusinessRepositPower,theAustralianNationalUniversity,UniversityofSydneyandUniversityofTasmania.Theprojectreceived$2.9MfundingfromARENA(AustralianRenewableEnergyAgency)aspartofARENA’sResearchandDevelopmentProgramme.

Overthreeyears,thetrialwilllookathowbattery-PVsystemscanbeusedbycustomersonBrunyIslandtomanagetheirenergyandsimultaneouslyhelpmanagethenetwork.

BrunyIslandwaschosenbecauseofthenatureoftheelectricitynetworkontheisland,andthedemandpeaksthatoccurthereduringholidayperiods.Deploymentofbatteriesofthissizecanmakearealandmeasurabledifference.

Thekeythemeofthisprojecthasbeencustomerchoice.Itisdesignedtoreplicateafuturewherecustomershavechosentoinstallabattery,withoutnetworkinvolvement.

Therearetwokeycomponentsofthetrial:

» abatterysubsidy,tomakeasolarandbatterysystemaffordabletoaBrunyIslandresident;

» ongoingpaymentstousethebattery,whenthereisanetworkconstraint.Thisisinitially$1/kWh.

Installationofthebattery-PVsystemsonBrunyIslandbeganinDecember2016.Upto40customerswillreceivesubsidisedinstallationofthesystems,withbatterycontrolsoftwaretoenablethemtosellelectricitybacktothegrid.

NETWORK BUSINESS

TasNetworks

PROJECT LOCATION

Bruny Island, Tasmania


TasNetworks,RepositPower,Australian

NationalUniversity,UniversityofSydney,

UniversityofTasmania

FUNDING

ARENAfundingandpartnerorganisation

contributions

PROJECT TIMING

CommencedApril2016

CompleteApril2019

CONTACT

[email protected]

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Theprojectincludesworld-leadingresearch,investigating:

» newwaystomakethenetworkandbatteriesco-operatetoresolvenetworkissues;

» newwaystofairlydistributethebenefitamongstthecustomers;and

» whatcustomersthinkandfeelabouttheirenergystoragesystems,andhowthateffectswhatwemaydowiththem.

Itisenvisionedthattheseenergystoragesystemswillassistinmanaginganetworklimitationinthecablessupplyingtheisland.Theywillalleviatecongestionontheunderseapowersupplycable,andreducetherelianceonextragenerationduringpeakseasons.

Itishopedthebattery-PVsystemswillprovidealong-termalternativetotheexpensiveoptionofinstallinganotherunderseasupplycableoraugmentingtheexistingcable.

CONSORT Bruny Island Battery Trial

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Onslow Distributed Energy Resources (DER) Project

The electricity industry is undergoing unprecedented levels of change placing the traditional utility business model at risk of rapid disruption.

Withsolarphotovoltaic(PV)connectionsinWesternAustraliaaloneprojectedtoexceedhalfamillionby2025,HorizonPowerbelievesthatdistributedenergyresources(DER)arethekeytoamoresustainableenergyfuture;whereindividualscanservicenotonlytheirownenergyneeds,butcanalsohelpservicetheircommunity’sneedsthroughadynamicenergytradingplatform.

TheOnslowDERprojectwillfullyexploretheoptionsfordevelopingasafe,reliablehighpenetrationrenewableDERenergysolutionforOnslow.HorizonPowerwilldelivernewpowerinfrastructureinOnslowintwostages.

Stageonewillconsistoffourmaincomponents:

» Apowerstationwith8MWofinstalledcapacity;

» Azonesubstation;

» 33kVdualcircuittransmissionlineintothenewzonesubstation;

» Extensionsoftheexisting11kVdistributionnetwork.

Stagetwowillconsistofdistributedenergyresourcesawayfromthemainpowerstationintheformof:

» Solar;and

» Batterystorage.

UnderpinnedbyamodularefficientpowerstationandstateoftheartsolarfarmtheOnslowMicrogridwillleverageoffadvancesindigitalcommunicationsinfrastructuretointegratewithintelligentdevicesandappliancesaswellasprepareforfuturetechnologies.

FurtherdevelopmentofHorizonPower’sleadingMicroGridOperatingPlatformaimstosupportthedevelopmentoflocalcommunitiesthroughincreasedcompetitionandgreaterparticipationwhichwilllowerelectricitybills,aswellasthesubsidiesthatGovernmentpaystosupporttheprovisionofreliableenergyacrossregionalareas.

NETWORK BUSINESS

Horizon Power

PROJECT LOCATION

Onslow, Western Australia


Stage1:DownerEDIEngineering–Power

Station,ZoneSubstationandTransmission

LineandGeographeUnderground–

DistributionNetworkextension

FUNDING

Internal

PROJECT TIMING

Stage1:January2017–March2018

Stage2:January2018–March2019

CONTACT

[email protected]

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Endeavour Energy SolarSaver Residential Battery Energy Storage Trial

NETWORK BUSINESS

Endeavour Energy

PROJECT LOCATION

Western Sydney


ITPRenewables

LGChem

SMA

Reposit

FUNDING

EndeavourEnergy’sDemand

ManagementInnovationAllowance

PROJECT TIMING

April2017–March2019

CONTACT

[email protected]

WesternSydneyisleadingthewaywithrenewableswithmorethan100,000homesnowwithsolarsystems.Withthemarketforresidentialbatterystoragealsorapidlyevolving,therearenowbothopportunitiesandbarriersassociatedwiththistechnologythatwillbeimportanttounderstandtoensuretheeffectiveandefficientdeploymentonelectricitynetworks.

Asasociallyresponsiblebusiness,EndeavourEnergyisworkingwithlocalcommunitiestodevelopprogramsthatuseelectricitymoreeffectivelyandefficientlywhilestillmeetingtheenergydemandsofourcustomers.

TheEndeavourEnergySolarSaverprogramaimstousetheenergystoredinabatteryinstalledinselectedhomeswithsolarpanels,toreducetheelectricitydeliveredfromthenetworkduringpeakdemandtimes.Ratherthanbuildingandmaintainingadditionalelectricitynetworktobeusedonlyafewdaysayear,SolarSaver isoneofanumberofnewprogramsusingamoresustainablewaytoreducepeakdemandandhelpresidentialcustomersuseelectricitymoreefficiently

UnderSolarSaver,customerswithasuitableexistingsolarpowersysteminvitedtoparticipatewillbeabletopurchaseabatterysystemfromaselectedsupplierfor25%ofthetotalcost.Inreturn,EndeavourEnergywillusetheenergystoredinthebatterytoreducetheelectricitydeliveredfromthenetworkduringpeakdemandtimes.ThebatterysystemcomprisesofaLGChem9.8kWhHVbattery,SMASunnyBoyStorage2.5kWbatteryinverter,and

Repositsmartmonitoringandcontrolkit.

Inadditiontothegeneroussubsidyforpurchaseofthebatterysystem,participatingcustomerssavemoneyontheirelectricitybillsbystoringexcessenergyfromtheirsolarpanelsandusingitduringpeakhoursorsellingittoselectedretailerswhenthespotmarketpriceishigh.

EndeavourEnergywillbecollectingenergydatafromtheinstalledsystemsuntiltheprogramendson31March2019.Theenergystoredinthebatterieswillbeusedtoreducetheelectricitydeliveredfromthenetworkduringpeakdemandtimes.Reducedinvestmentintheelectricitynetworkneededtocopewithpeakdemandwillhelpkeepthecostofelectricitydowninthefuture,sothateveryonewillbenefit.

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Endeavour Energy SolarSaver Residential Battery Energy Storage Trial

EndeavourEnergywillremotelycontrolthecharginganddischargingofthebatteriesupto12timespersummer(1Novemberto31March)andwinter(1Mayto31August)period.Themainobjectivesofthetrialinclude:

» quantifyingthenetworkdemandreductionpotentialfrominstallingbatteryenergystoragesystemsinresidentialpremises;

» understandingthecustomerbenefits;and

» buildingonthedemandmanagementcontrolcapabilitiesofthenetwork.

Asecondaryaimofthetrailistotestthepowerqualityimprovementcapabilitiesofbatteryenergystoragesystems.

EndeavourEnergytargetedcustomerswithexistingsolarpanelsofdifferentsizesthataresuppliedbytheParkleaZoneSubstationwhichhasthehighestpenetrationofPVsystemswithinEndeavourEnergy’sdistributionarea.ParkleaZoneSubstationisalsoforecasttoexceeditsfirmcapacityduetotheincreasedgrowthfromthere-zoninganddevelopmentsalongtheNorthWestRailcorridor.

TheSolarSaver recruitmentcampaigncommencedinApril2017withdirectmailpackssenttotargetedcustomersdirectingthemtoregistertheirinterestonline.Customersthatmettheregistrationcriteriaprogressedtothenextstageofhavingasiteinspectiontoconfirmtheireligibilitybeforethebatterysystemisinstalled,withthefirstinstallationexpectedinlateMay2017.

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Mooroolbark Community Mini Grid

Australia is in the midst of an energy revolution.

Thegrowthinsolarpower,energystorageandsmartcontroltechnologyhasthepotentialtochangethewaysocietyproduces,usesandsellsenergy.

Tohelpprepareforthisfuture,AusNetServicesistriallingAustralia’sfirstminigridinanestablishedcommunity.TheprojectenvisagesafuturewhereDistributedEnergyResources(DER)playamajorroleintheelectricitysupplysystem,andthedistributionnetworkbecomesadynamicplatformthatfacilitatestradeofenergyandenergyservices.

Toestablishamodelofthefutureelectricitynetwork,atypicalsuburbancommunitywasapproachedtotakepartintheCommunityMiniGridproject,withtheofferofsolarpowerandbatterystoragetobeinstalledatcustomerpremises.Theprojectencompassesthedesign,buildandoperationofa16householdminigridwithinasinglestreetinMooroolbark,atypicalsuburbancommunityinMelbourne’sEast.Allcustomersareconnectedtoacommondistributiontransformerviatypical3-phaseoverheadlowvoltagereticulation.Theprojectinvolves:

» Rooftopsolarphotovoltaic(3+kW)andbatterystoragesystems(5kVA/10kWh)at14of16houses;

» Centralnetworkdevicesincludingaswitchingcabinet,powermeter,andminigridstabilisersystem(15kVA/10kWh)atthelowvoltagegridconnectionpointtoallowtheminigridtotemporarilyseparateandoperateinislandedmode;

» Amonitoringandcontrolsystemthatcanoptimisepowerflowswithintheminigrid,performaggregatedcontrolfunctions,andwhichfeedsintoanetworklevel“DistributionSystemOperator”platform;

» Acustomerwebportaltoallowcustomerstomonitorandconfiguretheirenergysystems;and

» Thepotentialtoaddanairconditionerload-controltest.

NETWORK BUSINESS

AusNet Services

PROJECT LOCATION

Mooroolbark, Melbourne


GreenSync:Maincontractorfor

residentialenergysystemsandminigrid

controlsystem

Power Technology Engineered

Solutions: Designanddeliveryof

minigridstabiliser

EIV:DesignanddeliveryofLV

switchingcabinet

SUPPLIERS

ResidentialSolar:EnergyMatters,

JASolarandFronius

ResidentialBatteries:LGChem,

SelectronicandEcopower

Stabilisersystem:Toshiba,Vaconand

FreestyleTechnologies

FUNDING

RegulatedfundingundertheDemand

ManagementInnovationAllowance

PROJECT TIMING

Commencementdate:January2016

EXPECTED COMPLETION DATE

December2018

CONTACT

[email protected]

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TheminigridprojectseekstoinvestigatethevaluetothenetworkthatconcentratedDERcanprovidewhencoordinatedbyanetworkoptimisationscheme,theimpactsonthenetworkthatmayarisefromcustomerdrivencontrolofDER,aswellascustomerpreferencesregardinglocalenergysupplies.

Theprojectwilltestscenariossuchaspeakdemandmanagement,solarexportmanagement,virtualpowerplantoperation,responsetowholesalemarketsandlocalenergysharing.TheperformanceofDERsystemsinprovidingtemporarybackupsupplywillalsobetested,bothasindividualcustomersandasaninterconnectedminigridwhileislandedfromthemainnetwork.

Alltheresidentialandcentralhardwaresystemshavebeendeployedandareoperationalfollowingadetailedprotectionandsafetyreviewandcommissioningprocess.Theremotemonitoringsystemisinplaceandissupplementedbya24/7incidentresponseplanthroughtheissueandresponsetoSMSalerts.Systemintegrationhasproventobeachallengethroughouttheproject,howevertheminigridcontrolsystemisnowbeingimplementedwithasuiteofcomponentandsystemcontrolsscheduledtobedeployed.Testingisunderwayusingavailablecontrolssuchassolarexportlimitationandindividualbackuppowerprovision.Afullminigridislandoperationtesthasbeenundertakenwheretheminigridwasseparatedfromthemaingrid,temporarilypoweredby100%inverter-basedsupplies,andthenre-integratedtothemaingrid.

Establishingandnurturingcustomergoodwillthroughoutthetrialprocesscontinuestobeakeyactivityandanessentialingredientforsuccess.Giventhetimeandresourcecommitmentrequiredtomanagetheinstallationoftheresidentialenergysystems,animportantlearningexperienceforfutureinitiativesistopreferenceanengagementstructurewherecustomerstakesomeresponsibilityforproductselectionandinstallation,subjecttoanyinteroperabilityrequirements.

Mooroolbark Community Mini Grid

14

Stand-Alone Power System (SPS) Pilot

NETWORK BUSINESS

WesternPower

PROJECT LOCATION

Ravensthorpe,WestRiver,LakeKing

andOngerup,WesternAustralia


HorizonPowerandSynergy

FUNDING

Thisprojectwasfundedfrominternal

WesternPowerbudgets

PROJECT TIMING

July2016–July2017

CONTACT

[email protected]

[email protected] Western Australia, significant sections (about 40,000 km) of the fringe-of-grid assets were constructed under rural electrification policies of the State Electricity Commission of Western Australia between the late 1950s and the 1980s. Today, the age of network in these regions typically exceed 30 years of age and will be scheduled for replacement or refurbishment over the coming years.

Thehistoricalchallengeofrelativelylowpopulationdensityoveralargearearemainsessentiallyunchangedinthe21stcenturyleadingtohighcoststoservecustomers.

Localgenerationsupplyoptions,forexample,stand-alonepowersystems(SPS)haveevolvedinrecentyearsand,insomecircumstancespresentasafer,morereliableandmoreeconomicallyefficientalternativetonetworkrebuildforsomecustomersattheedgeofthedistributionnetwork,wherethereislowcustomerdensityandcustomershavelowelectricityconsumption.

InJuly2016WesternPowerinstalled6hybridphotovoltaic/diesel/batteryStand-alonepowersystemsinRavensthorpe,LakeKingandOngerupareasattheedgeoftheSouthWestInterconnectedNetwork(SWIN)aspartofa12monthtrialtotestthesuitabilityofthistechnologyasanalternativetoatraditionalnetworksolutionaswellasgaugecustomerresponsetothetechnology.

Installedsystemsconsistofsolarphotovoltaics(PV)ranginginsizefrom9-19KWandlithiumbatterystorageranginginsizefrom40–80kWh.Systemsalsoincorporateadieselgeneratortosupportthesystemduringperiodsofhighcloudcover.Systemsizesbetweenparticipantsvaryasunitshavebeendesignedtomeetthetypicalelectricalloadexperiencedateachsite.

SuitablepotentialsitesfordeploymentofSPSwereselectedviaanalysisofnetworkdata.Edgeofgridlineswerefilteredtolocateareasofthenetworkwithageingassets,lowcustomerdensityandrelativelylowenergyuse.Candidateswererefinedfurtherbyfilteringformediumtohighbushfireriskareaswhereasafetybenefitcouldalsoberealised.

15

ItwasdeterminedatearlystagesoftheprojectthatahybridPV/diesel/batterysystemwasthemostsuitablesystemtoconsiderasanetworkreplacementoption.CoststoprocureanddeployanSPSsolutionwasestimatedfromtenderbidsreceivedthroughanearlierRequest-For-Informationprocess.Lifecyclecostsforthissolutionwerecomparedtoatraditional“polesandwires”networkrebuild;wherelifecyclecostsoftheSPSsolutionwerelessthanorequalto50%ofthenetworkreplacementcostitwasconsideredtobeacandidateforSPSdeployment.

AdetailedfunctionalspecificationwasdevelopedincollaborationwithHorizonPowerandwassubsequentlyputtomarkettofindasuitabletechnicalpartnertodesignandinstallaswellasoperateandmaintaintheSPSunits.

Simultaneouslytoprojectactivities,WesternPowerhassubmittedarulechangerequesttotheAustralianEnergyMarketCommission(AEMC)requestingthatemergingtechnologysolutions(suchasstand-alonepower)bereclassifiedasformingpartofadistributionserviceascurrentdefinitionspreventwiderimplementationofthesetechnologies.SimilardiscussionshavetakenplacewithWesternAustralianregulatorybodies.

Learningstodatefromthetrialhavebeenpositive.KeyoutcomesfromPhase1ofthetrialare:

» Customerfeltreliabilityhasimproved;trialparticipantshaveexperiencedsignificantlylesspowerinterruptionsthanknownnetworkinterruptionsonthesamefeeders;

» FeedbackfromcustomershasindicatedaveryhighlevelofsatisfactionwiththeperformanceoftheSPSunitoveratraditionalnetworksolution;

» Thesystemshavebeenrobustenoughtosurviveextremeweathereventsandexhibitedonlyminortechnicalissuesundernormaloperations;and

» Theneedfordetailedcustomerequipmentauditsandenergyusagewasseenasanecessarysteptoidentifyanynon-standardloadswithinthecustomer’sfacilitywhichhavethepotentialtonegativelyimpacttheoperationoftheSPSunit.

Giventhesuccessofthetrialtodate,WesternPowerisintheprocessofdeterminingthenextstepsforthesixinstalledtrialSPSsites,andpendingtheresolutionofstatutoryandregulatorybarriers,WesternPowerisinvestigatingthepotentialforawiderrolloutofSPSasanetworkreplacementtool.

Stand-Alone Power System (SPS) Pilot

16

United Energy, Dynamic Voltage Management System Trial

NETWORK BUSINESS

UnitedEnergy

PROJECT LOCATION

UnitedEnergyDistributionNetworkin

Melbourne,Victoria


DynamicRatings&CGI

FUNDING

UnitedEnergyRegulatoryAllowance

CapexFunding

PROJECT TIMING

July2017toAugust2017

CONTACT

[email protected] Conservation voltage reduction is a proven method for reducing energy and peak demand on distribution networks.

UnitedEnergyhashistoricallyonlyusedthisunderemergencysituationstoavoidload-sheddingintheabsenceofAMIvoltagemeasurements.

Withadvancedmeteringinfrastructure(AMI)nowrolledoutthroughoutVictoria,thereisanopportunitytoapplyconservationvoltagereduction(CVR)withouttheriskofviolatingVictorianDistributionElectricityCodelimitsbyusingthereal-timevoltagemeasurementsfromAMItoinformthemagnitudeofthevoltagereduction.

ApreliminaryanalysisonvoltagedataprovidedbyAMIhasshownthereisopportunitytousethisvoltagedatatodynamicallymanagevoltagesonthenetworkandimprovesteady-statevoltageregulatorycompliance.Thisisexpectedtodeliverpotentiallylargestepchangesinsteady-statevoltagecompliance.Thisprojectaimstotestthetechnicalfeasibilityofconservationvoltagereductiontoregulatevoltagesandimprovethesteady-statevoltagecompliancetotheCode.

CVRisimplementedbycontrollingthevoltagewithintheregulatorylimitsdefinedbytheCodeusingon-loadtapchangesatzonesubstations.ThisprojectisrequiredtotestthetechnicalfeasibilityofCVRtoregulatevoltagesandimprovethesteady-statevoltagecompliancetotheCode.

ThisprojectaimstotrialtheCVRtechniqueontwozonesubstations.ToimplementCVR,voltagedataprovidedbythesampledmeterssuppliedfromazonesubstationisgatheredandsenttotheNetworkAnalyticsEnginetomakedecisionsonoptimisingthevoltagesaccordingtothedynamicloadpattern.Thecontroltoactivatetheappropriatepre-definedvoltageset-pointwillthenbesenttotherelevantvoltageregulatingrelay(VRR)atthezonesubstation.TheSCADAapplicationwillprovideUnitedEnergywiththeadvancedcapabilitytomanagevoltageconservationswithinthenetwork.Ithasbeenproposedtoapplypre-definedvoltageset-pointstotheVRRsatthenominatedzonesubstations.

InitialanalysisontheAMIdatahasshownthattheproposedschemewithinthenominatedzonesubstationscanresultinstep-changeimprovementsinthequalityofsupplycompliance,inparticularduringperiodsoflightload.

17

Crotty Dam Remote Area Power Supply

Crotty Dam is a remote site owned and operated by Hydro Tasmania, and is located along Lake Burbury approximately 25km southeast of Queenstown on the western coast of Tasmania.

Therearetwohydroelectricsitesonthewesternshoreofthedam;awaterintakeshaftfortheundergroundtunneltoJohnButtersPowerStation,andadewateringshaftlocatednexttoCrottyDam.

TheCrottyDamsiteswerebuiltinatimewhenitwasnoteconomicallyviabletosupplypowertoremotecustomerswithoff-gridtechnologies.AtthattimeinordertoprovidepowertoCrottyDam,a12.7kmthreephase22kVfeederwasinstalled.Ongoingassetreplacementsandheavyvegetationcutswerenecessarytomaintainthefeeder;andthismaintenancewasnolongerconsideredtobethemostcosteffectivesolution.

ThroughadvancementsintechnologyanewproposalwasputforthbyTasNetworkstobuildanoff-gridsolutiontosupplyCrottyDam.

RemoteAreaPowerSupply(RAPS)areacosteffectivealternativetosupplyingelectricitytocustomers“onthefringe”oftheTasNetworkstransmissionanddistributionsystem.Theprojectisself-fundedbyTasNetworksasaregulatedcapitalinvestment.Equipmentsupply,designandinstallationwereprovidedbyThiessServices(previouslySilcarPersonnel).TheprojectwascompletedinApril2014.

TheRAPSsystemswereconsideredatechnologytrial.Therearemanyotherremotesitesthataresuppliedbyageinglongspurdistributionlineswhicharecostlytomaintain.RAPSmayalsobeamorecosteffectiveoptiontosupplythelocalcustomerscurrentlysuppliedbytheselines.

In2014/15twoRAPSsystemswereinstalledandcommissionedatCrottyDam,withthedesignandtechnicalsupportconductedbyThiessServices(previouslySilcarPersonnel).Thesitesarenowpoweredbyamixtureofdieselgenerationandbatterystorage.

The22kVlinewasdecommissionedin2015,avoidingtheongoinglinemaintenanceandreplacementcosts.

Asatrial,theCrottyDamRAPShasprovidedvaluablelearningsforthebusiness,theseincludeprocessimprovementstocovernewtechnologies,butalsotechnicalknowledgefortheRAPSdesignandconstruction.

TasNetworkswillworkingtostandardiseRAPSassetssothatthetechnologycanbesimilarlydeployedatfuturesimilarsites.

NETWORK BUSINESS

TasNetworks

PROJECT LOCATION

Crotty Dam, West Coast Tasmania


TheissServices

FUNDING

TasNetworksregulatedfunding

PROJECT TIMING

RAPScommissionedinApril2014,line

removedin2015.

CONTACT

TasNetworks

18

Endeavour Energy Grid Battery Energy Storage System (BESS) trial

NETWORK BUSINESS

Endeavour Energy

PROJECT LOCATION

Dapto, NSW


Inprocurement

FUNDING

Pilotprojectfundedfrominternal

EndeavourEnergybudgets

PROJECT TIMING

Forthesummer2018-19

CONTACT

[email protected]

Energy storage is a potential solution to the critical challenges facing the power grid today by providing customers a safe and reliable power supply without having to build more expensive network upgrades.

Batterystoragesystemsalsohavesignificantpotentialtohelpmanageloadgrowth,peakdemand,powerqualityandsupplyinterruptions.Withmorehomesolarsystemsbeinginstalled,energystorageisalsoimportantinenablingrenewableenergytobesavedforusewhencustomersneeditthemost.

Inwhatwillbeafirstinitsnetwork,EndeavourEnergyisundertakingatrialtoquantifytheefficiencyandnetworksupportbenefitsofagrid-scaleBatteryEnergyStorageSystem(BESS).ThetrialinvolvestheinstallationofaonemegawatthourbatterystoragesystematthefuturesiteofEndeavourEnergy’sWestDaptoZoneSubstationintheIllawarraregion.Onceinstalled,theBESScoulddeferconstructionoftheproposedWestDaptoZoneSubstationforseveralyears.

Thelocationwasselectedforthepilotduetothescaleoffutureresidentialdevelopment,thepeakloadcharacteristicsoftheareaoversummerandtheageoftheexistingnetwork.Whenfullydeveloped,theWestLakeIllawarraReleaseareaswillcontain27,000newdwellings.

ThepilotBESSwillbecontainerisedandmodularforeaseofrelocation,andwillconsistof:

» 1MWhrBattery

» AC/DCPowerConversionSystem

» 11kVStep-upTransformer

» HVProtectionandControl.

Thetrialwilltestthepotentialofbatterystorageinareal,grid-scalesettingandprovideEndeavourEnergywiththeexpertisetoutilisethistechnologyasfutureneedsarise.Similarbatterysystemscould

19

Endeavour Energy Grid Battery Energy Storage System (BESS) trial

bedeployedinothergrowthareasofEndeavourEnergy’snetworktodefertheconstructionofuptofournewzonesubstationsby2024andreducenetworkinvestmentbyupto$1millionperyear,keepingdownwardpressureonnetworkcharges.

ThisissignificantasEndeavourEnergyservicesthehighgrowthregionsofNSW,withthepopulationofGreaterWesternSydneyforecasttogrowapproximately46%by2031.WhiletheoverallNSWpopulationgrowthisforecasttobestrongat1.2%p.a.over20years,overwhelminglythegrowthisconcentratedinGreaterWesternSydney,withtheregion’spopulationforecasttogrowbyalmostonemillionpeople(46%)overthetwodecadesfrom2011to2031.

EndeavourEnergy’snetworkincludestheNorthWestandSouthWestPriorityGrowthAreasofSydney,establishedin2005toaccommodate500,000newresidentsover30years.TheseprioritygrowthareasaretheresultofthebiggestcoordinatedlandreleaseinNSW’shistory.

Generallytheexistingnetworkintheseareasissetupforthesupplyofruraltypeloadsandisnotsuitabletosupplythefutureurbandevelopment.Traditionalnetworksolutionstomeetdemandintheseinstanceshavebeentoaugmenttheexistingdistributionfeeders,andwhenthisisinadequate,constructagreenfieldzonesubstation.

AlternativelyaBESScanmeetshorttermdemandwithsupplementarysupplytodeferboththeaugmentationoftheexistingnetworkandtheestablishmentofthefinalsupplyinfrastructure.Ithasthepotentialtoimprovethequalityofelectricitysupplyinconstrainedpartsofthenetworkandprovidebackuppowerduringnetworkoutages.

TheBESSpilotprojectiscurrentlyintheprocurementphaseandisexpectedtobeinstalledandcommissionedatWestDaptobeforesummer2018.

20

Esperance Standalone Power System Project

NETWORK BUSINESS

HorizonPower

PROJECT LOCATION

Esperance,WA


EMC,GHD

FUNDING

Internal

PROJECT TIMING

December2015–October2016(nowin

permanentoperation)

CONTACT

[email protected]

[email protected]

Devastating fires in November 2015 caused widespread damage to the Esperance power system including the loss of 324 poles.

Ratherthanreplaceallofthedamagedoverheadequipment,HorizonPowerelectedtorestorepowersupplytoanumberofcustomersusingStandalonePowerSystems(SPSs).

ThiswasenabledbytheworkHorizonPowerhadpreviouslyundertakenwithWesternPowerontheSPSPilotforRavensthorpe,whereHorizonPower(asWesternPower’s“TechnicalPartner”inthatproject)hadsufficientknowledgeofSPSstobeabletostepintoareal-worldapplicationoftheequipment.TheprojectwasdesignedtoreplacethedamagednetworkwithaviableSPSalternativeandenableHorizonPowertoundertakeitsownSPSrollout.TemporarydieselgeneratorswereinstalledtoprovidepowerwhilewaitingfordeliveryofthepermanentSPSsolution.

TheprojectdeliveredStandalonePowerSystems(SPSs)tofivecustomersintheEsperanceregion,witheachsystemcomprising:

» GroundmountedsolarphotovoltaicPVof8-12kW

» Centralbatteryinverterof6kW,between1and3persite

» Batterystorageusingrackable1.2kWhbatterieswithsizingoptimisedfortheparticularcustomer

» Adieselgeneratorof15-20kVA

HorizonPowerdidnothavegoodmeteringinformationforthesecustomersasnon-intervalmeterswereinplacepriortotheNovember2015fires,withonlyannualmeterreads.Thereforethedecisionwastakentoinstallasimilarsystematallsitesthatcouldbeaugmentedlatertosuitthespecificcustomerenergyrequirements.Macroissuesweredealtwith,suchassinglephasevsthreephase,thenumberofbatteryinverterssufficienttomeettheexpectedpeakloads,andalayouttosuittheavailableland.Followingtheinitialinstallationandcommissioning,additionalbatterystoragewaslateraddedtominimisethesystems’dependenceonthedieselgenerator.

HorizonPowerimplementedatailoredCustomerAgreement,whichwasamodificationoftheStandardFormCustomerContracttoenablethespecificconsiderationsofSPStobecateredfor.

ThesystemsweredeliveredbetweenMarchandMay2016.Followingcommissioningallsystemshaveproventobereliable.ThebatteryaugmentationwascompletedinOctober2016,andthisisontracktolimitthegeneratorruntimetolessthan250hoursperyear.

SPSisnowanadditionaltooltobeusedinHorizonPower’snetworkplanning.

21

Summer Saver Program

Figure 1: 7 January event results

NETWORK BUSINESS

UnitedEnergy

PROJECT LOCATION

UnitedEnergyDistributionNetworkin

Melbourne,Victoria


Bidgely

FUNDING

UnitedEnergyDemandManagement

InnovationAllowanceandRegulatory

AllowanceOpexFunding

PROJECT TIMING

December2016-March2017

CONTACT

[email protected]

[email protected]

The United Energy distribution network has observed growth in maximum demand exceeding growth in average demand for many years.

Thisresultsinanincreasingpercentageofnetworkcapacitybeingunderutilisedexceptduringhotweather.Currentlythetop20%ofsystemcapacityisusedforapproximately1%oftheyear.Toaddressthisissue,UnitedEnergyintroducedtheSummerSaverProgramtoprovideanalternativetothetraditionalsolutionofbuildingnewinfrastructure.TheProgramincentivisescustomerstoreducedemandduringtimesofmaximumdemand,thusachievingnetworkaugmentationdeferral.

SummerSaverProgramisavoluntaryresidentialdemandresponseprogramthatisrunfromDecembertoMarcheveryyear.Customersconnectedtocapacityconstrainedsitesarerecruitedtoparticipateintheprogramandcalledtoprovidedemandreductionsduringtimesofnetworkconstraintwhichusuallyoccurwherethemaximumtemperatureisabove35°C.Customersareprovidedwithasmart-phoneappthatallowsreal-timemonitoringofenergyusageduringevents.Thecustomers’smartmetersareutilisedtoprovidethereal-timeusageinformation

First,suitabilityofcapacityconstrainedsitesonthedistributionnetworkfortheSummerSaverProgramisevaluated.Customerseligibleatthecapacityconstrainedsitesarethenrecruitedviadirectmarketingtoparticipateintheprogram.Registeredcustomerwillbenotifiedinadvancethroughemailandthesmart-phoneapplicationofaneventoccurring.Customersarealsoinformedonthetimingandtheirpreviousconsumptiononlikedays.

Theprogramhasbeenatremendoussuccesswithonaverage77%ofparticipantsoutof552successfulacrossalltheevents.Successfulcustomersonaveragereduced1kWindemandduringtheevents.ThishasallowedUnitedEnergytodeferaugmentationat92sites.Resultsofaneventon7January2017aredemonstratedinFigure1.

1 AM 3 AM 5 AM 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM 7 PM 9 PM 11 PM

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[email protected]+61262721555

contact

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