Title: Revise West Hub Definition Due to Permanent Topology Change
Next Group:
Next Step:
Status: Approved on 03/19/2013
Effective Dates:


Date Gov Body Action Taken Next Steps
03/19/2013 BOARD Approved
01/03/2013 TAC Recommended for Approval ERCOT Board Consideration
12/13/2012 PRS Recommended for Approval TAC Consideration
11/15/2012 PRS Recommended for Approval PRS IA Review

Voting Record

Date Gov Body Motion Result
03/19/2013 BOARD To approve NPRR496 as recommended by TAC in the 1/3/13 TAC Report Passed
01/03/2013 TAC To recommend approval of NPRR496 as recommended by PRS in the 12/13/12 PRS Report Passed
12/13/2012 PRS To endorse and forward the 11/15/12 PRS Report and Impact Analysis for NPRR496 to TAC Passed
11/15/2012 PRS To recommend approval of NPRR496 as submitted Passed

Vote tallies here reflect individual votes, not the weight of the votes by market segment. Affirmative votes are not recorded in these vote tallies. For additional details on the voting record, please consult the Recommendation or Action Report, or the official vote tally if available, as posted in the key documents.


Status: Approved
Date Posted: Oct 31, 2012
Sponsor: ERCOT
Urgent: No
Description: This Nodal Protocol Revision Request (NPRR) revises the West 345 kV Hub to replace the Sweetwater Cogen (SWCOG) Hub Bus with Sweetwater East Switch (SWESW) Hub Bus.
Reason: The Transmission Service Provider (TSP) for the SWCOG station notified ERCOT that it needs to remove this Hub Bus from the Updated Network Model as it is no longer in the network. Until such time as this Hub Bus is removed from the Hub Bus definitions, it has been changed to be a "pseudo" bus that is connected radially to the SWESW station, since there are no longer any devices at the SWCOG station. In accordance with paragraph (4) of Section 3.5.1, Process for Defining Hubs, shown below for reference, ERCOT proposes to revise the West 345 kV Hub definition to remove the SWCOG Hub Bus. "In the event of a permanent change that removes the Hub Bus from the ERCOT Transmission Grid, ERCOT shall file a Nodal Protocol Revision Request (NPRR) to revise the appropriate Hub definition" Since SWCOG is/was radially connected to SWESW, it is an appropriate substitution for the removed Hub Bus. Therefore, ERCOT proposes to add a Hub Bus at SWESW as part of this Hub definition revision.

Key Documents

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