Methods of Converting CIM Power System Models into Bus-Branch Formats Utilizing Topology Processing Algorithms and Minimal Schema Modifications to IEC 61968/70

This paper describes the design of the ERCOT topology processor algorithms, used in conjunction with modeling extensions to IEC 61968/70 standards, that are employed to convert CIM representations of balanced three-phase power system models used in real-time operational energy management applications into standardized bus-branch models used in transmission system planning applications (a flat file format used by PSS/e and Powerworld applications). By using such algorithms, ERCOT is able to utilize a single, unified, highly granular data model source to support all real-time operations and steady-state planning processes, thus removing a primary area of discrepancy that has historically existed between the electrical power industry's planning and operational departments that has long been associated with staging these two modeling environments independently.