A methodology for modeling telemetry in power systems models using IEC-61968/61970

This paper discusses methodologies developed by ER-COT to model telemetry used by its Supervisory Control and Data Acquisition (SCADA) system and its sources like the Inter-Control Center Communication Protocol (ICCP), inter-telemetry calculations etc. By utilizing the CIM model defined by the IEC-61968 and IEC-61970 standards, and extending the CIM representations of balanced three phase power system devices defined in those standards, a CIM-based model is created with all the necessary telemetry and is used to support ERCOT´s realtime operational energy management and market management applications. This approach allows ERCOT to utilize a single, unified, highly granular data model source to support all realtime operations and market model data collection & aggregation processes, remove a disconnect that has existed in the electrical power industry´s model data management schemes associated with independently maintained market and operations models, minimize the labor involved in staging, modeling & maintaining these data models and reduce the discrepancies that arise from having independent data model sourcing.