Power System Modeling Updates and Notifications
Stay informed about power system modeling updates with the NERC System Analysis Modeling Subcommittee (SAMS) as they identify and notify industry of obsolete models, such as the EX2000 Dynamics Component Model, Gas Turbine Governor Modeling, and more, ensuring reliability and compliance with standards.
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Presentation Transcript
NERC Acceptable Model List Brad Woods Reliability Services
Model Notification and List NERC System Analysis Modeling Subcommittee (SAMS) was directed by the NERC Planning Committee (PC) to create a process to inform industry of obsolete models SAMS consists of experts from all segments of the electricity industry SAMS receives and reviews power systems modeling issues and background data from power system modeling subject matter experts (SME) and simulation tool users SAMS performs analysis, if necessary SAMS creates modeling notifications for unacceptable models and posts these notifications on the NERC SAMS website after approval Unacceptable models are identified in the NERC Acceptable Model List which is posted on NERC SAMS website SAMS accepts/reviews comments received from industry on notifications DMTF Workshop 1/23/2018 2
Model Notification Examples EX2000 Dynamics Component Model for Excitation Systems Information received by SAMS indicated that the EX2000 dynamics model in the Siemens PTI PSS/E power system dynamics simulation program does not properly modelthe equipment that it is intended to represent. EX2000 is a General Electric (GE) excitation system for synchronous generators. Gas Turbine Governor Modeling The GAST, GAST2A, GASTWD, GFT8WD, and WESGOV models are simple representations of a turbine-governor control system, developed and introduced as early as the mid-1970s. These models are considered obsolete and should not be used for representing new generators and applicable existing generators. Use of GENTPJ Generator Model Testing in connection with NERC Reliability Standard MOD-026 has revealed that the GENSAL, GENROU, and GENTPF generator dynamic models may significantly underestimate the field current needed to support rated reactive power output of the generator and, consequently, could introduce significant error into simulations where reactive power support is an issue. DMTF Workshop 1/23/2018 3
Model List DMTF Workshop 1/23/2018 4
DWG Manual (ROS Approved 01/2018): Unacceptable Models List of acceptable/unacceptable dynamic models are published on the NERC SAMS website. Unacceptable models will not be accepted for new generator interconnections nor for dynamic model updates. If a generation interconnection or dynamic model update has begun prior to a model being identified as unacceptable by the NERC SAMS, the model shall be allowed to be used in the dynamic flat start cases. Unacceptable models that already exist in the ERCOT dynamic dataset shall be phased out through dynamic model updates including updates received via the NERC MOD-026-1 and MOD- 027-1 processes. DMTF Workshop 1/23/2018 5
Questions ? DMTF Workshop 1/23/2018 6
