UtilityPanel_Alabama Power

G. Larry ClarkAlabama Power, A Southern CompanyFall 2009 CIM User Group MeetingEPRI, Charlotte, North CarolinaNovember 11-13, 2009CIM Utility Case StudyAlabama Power

Presentation Agenda2006CIM Utilization ExperienceAlabama Power Specific IssuesAlabama Power Observations2009Alabama / Southern AMI System (and Interface standards)CIM Modeling Gap Analysis (for the Distribution feeder)

Serve 4.4 Million Retail CustomersGenerating Capacity : 42,000 MW120,000 Square MilesThe Southern Company3Alabama Power CompanyAPC serves 1,431,334 CustomersAPC owns or operates 81 electric generating units with 12,222 megawatts Total Nameplate Capacity Coal 70.53 % Nuclear .. 17.99 % Gas and Oil 9.55 % Hydro .. 1.93 %Regulated by The Alabama Public Service CommissionRate Stabilization

Alabama Power CompanyInstall 28,000 new meters per yearOver 6,600 Employees10,218 Miles Transmission79,430 Miles Distribution44,500 Sq. Mile Service TerritorySix Geographic DivisionsCIM Utilization ExperienceExperience period June 2006 to August 2006

Semantic layer decouples application from data, but resulting XML file substantially increases model size

Component attributes are removed from entity causing the schema to use relationships to provide adequate attributionAttribution is abstracted to achieve flexible data format while causing model complexitye.g. Address is not an attribute of equipment, but is in the Erp.Address space

CIM Utilization ExperienceGraphics placement was removed from CIMGML is used to represent graphics placementUse of GML resulted in considerable extensions to modelUse of GML did not provide adequate means to represent the same data element as different symbols at different scales

Alabama Power Specific IssuesMetering was not complete in CIM data model in 2006Measurement points for line-post sensors did not existAddress information was very complex to represent using the Erp modelDistribution pole-mounted recloser was not in CIM (Breaker is included but only in the context of a substation)Capacitor model was not complete requiring considerable number of extensionsCTs and PTs were not represented resulting in extension additions

Alabama Power Specific IssuesAlabama model contains approximately 500 attributesApproximately 300 attributes of the Alabama attributes were found in the CIM definitionsApproximately 100 attributes required extensions which have been added to CIMAnother approximately 100 attributes were identified as Alabama custom attributes and have not yet been added to CIMConsequently, approximately 400 of the 500 attributes in the Alabama model are in the CIM which includes the 100 attribute extension additions

Alabama Power Specific IssuesAlabama chose to use a flatter XML file specifically to manage large GIS model files to achieve:Faster movement of smaller files across the network to support incremental updates of the operational modelFaster translation from GIS XML to IDMS XML

Alabama Power ObservationsSouthern/Alabama supports the industry movement to a common modelFor IDMS interfaces to external applications (e.g. CIS, AMI, IVR, Work Management), the vendors do not offer a CIM compliant interfaceCIM is too complex and heavy for efficient movement of the GIS data model (based on the substation being the smallest increment)Southern/Alabama will continue to pursue opportunities to use CIM messages on the utility integrated bus to externalize IDMS data to the enterprise

Buddy ModeServers, Software & Databases(RNI)IEESouthern Companys Enterprise Systems

Data Backhaul to SCSBase StationTowerWireless RF CSSComplex BillingLoad ResearchEnergyDirect Outage ManagementDemand ResponseService Orders PQView Others

1.5 MM MetersAMI DashboardEnterprise Bus

DisplaysLCM

Multi-Comm PCT/G-way

H/WHANCIM IEC 61968-9(IEC IS)CIM IEC 61968-8(under development)OrMulti SpeakC12.22SEP 2.0C12.19C12.22

PHEVMV90

MV/XI CommEVMION EnterpriseAlabama / Southern AMI SystemProprietary TodayUse standardsNon-proprietaryInteroperabilityFlexNetUSnap USB Port in Home12CIM Modeling Gap AnalysisCIM was originally developed to represent the transmission systemsNo interoperability testing has occurred (CDPSM InterOp testing planned for November 2009)CIM has not yet evolved to support North American distribution feedersMultiSpeak Specification has evolved specifically to support North American feedersDistribution Model Problem StatementBoth lines and loads are typically unbalancedMany lines and transformers are single-phase or two-phase

CIM Modeling Gap AnalysisNew features are needed in CIM (specifically the CDPSM) to better support North American Distribution feedersCIM IssuesSubmitted through the IEC TC 57 / WG 14 Part 11 Modeling teamWG17?Switching Operational Model exchange?CIM needs Recloser and Sectionalizer classes to represent North American Distribution feeders

CIM Modeling Gap AnalysisOutage Analysis ImpactClarify the use of geographic coordinatesBring back the EquivalentLoad classAssign phase codes to windingsEverything outside the substation should be in a feeder containerClarify the appearance of phases on Terminals and Connectivity Nodes

CIM Modeling Gap AnalysisPower Flow testing impactAdd the full complement of control parameters for voltage regulatorsFor capacitor controls, add the modes for power factor, var control, time, and temperatureAdd a new line code class, to facilitate transfer of power flow modelsDefine a structured matrix format for the phase impedance matrices of a general number of conductors and other applications

CIM Modeling Gap AnalysisAsset modeling and fault analysis impactAdd a Recloser classAdd a Sectionalizer classAdd a Sensor classConclusions and RecommendationsReclosers, sectionalizers, and sensors need to be added to the CIM as assetsThe Distribution electrical model needs adequate representations of reclosers, sectionalizers, and sensorsPresentation Epilogue2006CIM Utilization ExperienceAlabama Power Specific IssuesAlabama Power Observations2009Alabama / Southern AMI System (and Interface standards)CIM Modeling Gap Analysis (for the Distribution feeder)G. Larry ClarkAlabama Power, A Southern CompanyFall 2009 CIM User Group MeetingEPRI, Charlotte, North CarolinaNovember 11-13, 2009CIM Utility Case StudyAlabama Power

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