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NPRR #290 · Revision Request

NPRR290  ERCOT Publication of DAM PSS/E Files

Approved sponsor Henry Durrwachter on behalf of Luminant Energy Company LLC posted 2010-10-27 ercot.com
ReasonThe original intent of the Market Participants was to have incremental updates published by ERCOT on a daily basis so that they could properly model the ERCOT System and replicate the DAM solution. ERCOT has stated in the Nodal Advisory Task Force (NATF) meetings and through the "Networking Modeling Expectations for TSP, REs, and QSEs" whitepaper that it will not be able to comply with the Protocol requirement to provide daily model updates. Therefore, to provide Market Participants the transparency and ability to review the implied power flows of the DAM solution, this NPRR adds a requirement for ERCOT to post daily on the Market Information System (MIS) Public Area a package of transmission data files in PSS/E format that describe each hour’s associated transmission system topology (including contingencies) and mapping of generators, Loads, transmission lines, transformers, and Hubs.
Created2010-11-18
Approved2011-04-19
Sections Affected
4.2.3
Summary
This Nodal Protocol Revision Request (NPRR) enhances transparency of the transmission topology (including all scheduled Outages) used in the Day-Ahead Market (DAM) by requiring ERCOT to publish certain data files (in Power System Simulator for Engineering (PSS/E format) for easy review by all Market Participants with standard power flow tools such as PTI PSS/E, Power World Simulator, etc. Much of the tools needed by ERCOT to meet the requirements of this NPRR were developed and semi-automated during the Nodal DAM market trials and this NPRR seeks to leverage that work for long term market benefit.
Timeline