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Extension of the Common Information Model with a Catalog of Topologies

Extension of the Common Information Model with a Catalog of Topologies. Proposal for IEC TC57 WG14. PhD. Dragan S. Popović M S c. Ervin Varga. Motivation. To raise performance of the system with maximum knowledge about the physics of the problem .

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Extension of the Common Information Model with a Catalog of Topologies

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  1. Extension of the Common Information Model with a Catalog of Topologies Proposal for IEC TC57 WG14 PhD. Dragan S. Popović MSc. Ervin Varga

  2. Motivation • To raise performance of the system with maximum knowledge about the physics of the problem. • To encourage the DMS vendors to use more of CIM based solution in the new generation of DMS software. • To get closer to internal CIM compatibility on modular level (efficient interoperability tests).

  3. The CIM connectivity model

  4. Node 1 Busbar [BusbarSection] Terminal 1 ConnectivityNode 1 Terminal 2 Breaker Breaker Node 2 Terminal 3 ConnectivityNode 2 Terminal 4 D isconnector Disconnector Bay Terminal 5 ConnectivityNode 3 Node 3 Terminal 6 ACLine Segment ACLine Segment a) b) The description of a network • a) the physical representation • b) CIM connectivity model

  5. bay’s basic elements Instance of a Bay terminal Instance of a Composite Switch conn. node Transition from connectivity to topology

  6. Catalog of equipment in CIM

  7. Inputs of a bay Outputs of a bay Bay External element 1 External element 2 The matching record in the catalog of bays describes the internal topology of a bay. The bay consists of several pieces of equipment, and their interconnections. Abay as a fundamental idea • interconnections of external elements through a bay • the bay's inputs/outputs • the bay's internal structure

  8. 1 2 Busbar_1 Busbar_2 Disc_1 Disc _2 1 2 4 Current Transf_1 The core bay 5 Breaker_1 6 3 Disc_3 Line_1 (segment) 3 b) a) The 2-layer model of the catalog of bays • a) the core abstract bay definition • b) the non-core core abstract bay definition

  9. Naming +Completes_PSR 0..1 +References_PSR +Referenced_By PSRReference PowerSystemResource 0..n 2 0..n +Contains_References 0..n +Completed_By +Contains_Equipment 0..n EquipmentContainer Equipment 0..1 +MemberOf_Bay 0..1 +MemberOf_EquipmentContainer +Defines_Topology_For Bay 1 +Completed_By +Completes_Bay +TopologyIsland 0..n 0..1 +Topology_Defined_By 0..1 TopologicalIslandType TopologicalIsland 0..1 key 0..1 +TopologicalIslandType The content of the new Catalog package

  10. Implementation details • Excerpt demonstrating the Completes_Bay association: • <cim:Bay rdf:ID="Bay_156741"> • <cim:IdentifiedObject.name>Bay 156741</cim:IdentifiedObject.name> • <cim_ext:Bay.Completes_Bay • rdf:resource="http://uns.ns.ac.yu/DMSGroup/CatalogOfBays/2006/08#Bay_Catal9_1"/> • <cim:Bay.MemberOf_Substation • rdf:resource="#Substation_359158"/> • </cim:Bay> • Sample illustrating the Completes_PSR association: • <cim:Breaker rdf:ID="Breaker_359194"> • <cim:IdentifiedObject.name>BR 359194</cim:IdentifiedObject.name> • <cim:Equipment.MemberOf_EquipmentContainer rdf:resource="#Bay_156741"/> • <cim_ext:PowerSystemResource.Completes_PSR • rdf:resource="http://uns.ns.ac.yu/DMSGroup/CatalogOfBays/2006/08#Bay_Catal9_1-Breaker_1"/> • </cim:Breaker>

  11. a) b) c) d) Advantages of the catalog of bays concept • a) Standard network model • b) “CIM model” with ConnectivityNodes • c) Transformation of “CIM model” to bay blocks model • d) Transformation of bay blocks model to bus-branch model

  12. CPU Time [s] CIM model 78 CIM model with proposed changes 73 19,1 15,1 Tested networks Novi Sad Puebla CPU Time [ms] CIM model CIM model with proposed changes 937 875 313 188 Tested networks Novi Sad Puebla Test results • the histogram showing the CPU times for serializing the networks of Novi Sad and Puebla • the histogram showing the topology analysis times for the networks of Novi Sad and Puebla

  13. Conclusion • The size of the CIM/XML document containing exported data about the network is reduced. • The speed of processing the topology of the network is also significantly reduced. • Accepting the proposal on an international level paves the way for standardizing the catalog of topologies. • The data management (input and verification) is enhanced. • The checking of allowed switching operations within the bays is lot simpler.

  14. Changes in basic CIM model or the application database • Introduction of the catalog of topologies is a natural extension of modeling topology parameters that already exists in CIM. • Introducing the catalog of topologies does not impose any limits to general modeling, or violate CIM compatibility, but provides many benefits. • Incorporating the catalog of topologies into an application database is useful for all applications, but very time consuming. Therefore, it would be better to apply it in the basic model.

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