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engineersaustralia.org.au
VENUEHarricksAuditorium8ThomasStreetChatswoodNSW2068
DATE&TIMEThursday8November20185.30pmfora6.00pmstart
Lightrefreshmentswillbeprovidedpriortothepresentation.
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Neutral earthing configurations in the balance: is there a universal panacea? Are Peterson Coils Risk Eliminators?
Hostedby:IEEE(NSWSection)
JointInstitutionLectureSeries
TheBlackSaturdaybushfireswhichdevastatedVictoriain2009causedthedeathsof173andthelossofover2000homeswithdamagesof$1070million.ARoyalCommissionwastaskedwithinvestigatingtheeffectivenessandcompletenessofthethreatreductionmeasuresimplementedsincethebushfiresof1977and1983andmaderecommendationsregardingfurtherriskmitigationmeasures.SubsequentlyaTaskforcewasformedanddevelopedajustifiablestrategy,thatRapidEarthfaultCurrentLimitersbeinstalledatzonesubstationssupplyingpowerto‘highbushfirethreat’areastominimizetheriskoffireduetosparkscausedbypowersystemsAustraliahastraditionallyrunMVpowernetworkswiththesupplyearthed-solidlyorviaanimpedance.Theintroductionofcompensatedorresonantearthingoffersanoperatoranumberofbenefitsintermsofreliabilityandearthfaultenergyreduction,yetthesedonotcomewithoutnegatives.Unfortunately,nosingleneutralearthingconfigurationisapanaceaforalltheills.Dependinguponsystemtopologyandlocation,asystemfacesmanyconflictingchallenges,includingcapitalandoperationalcosts,maintainingsystemreliability,electricshocksafety,bushfireignition,faultlocation,insulationcoordination,operationalflexibility,equipmentstressordamage,harmonicsourcemanagement,protectiondiscrimination,andcogenerationcompatibility.Thispresentationwillprovideacomparativeassessmentofanumberofneutralearthingschemeswithaviewtoidentifyingthestrengthsandweaknessesofeachsystemandtheabilitytoeliminatethethreatofbushfires.
AbouttheSpeakerDrBillCarmanBillworkedfor37yearsforAusgrid,andsince1982hasbeencloselyinvolvedinearthingdesignandtesting,safetyanalysis,standardsandR&D.SinceleavingAusgrid,in2014hehasoperatedasanindependentconsultantassistingclientswiththemanagementofearthingandlightningrelatedrisk.Billhasadoctorateintheareaofearthingsystemriskquantificationanddesign,hasauthoredover45papers,andisaconjointSeniorLectureratNewcastleUniversity.Heisactiveonearthingandlightningprotectionrelatedstandardscommittees.HechairedthejointCigre/CiredcommitteeB3:35whichhascompletedaninvestigationintotheintegrationofquantifiedriskinearthingsystemdesignandoperation,andisamemberofthenewCigreWGB3:52investigatingneutralpointearthingonfigurations.
