NPRR #496 · Revision Request

NPRR496 Revise West Hub Definition Due to Permanent Topology Change

Approved sponsor ERCOT posted 2012-10-31 ercot.com

ReasonThe 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.

Created2012-11-15

Approved2013-03-19

Sections Affected

3.5.2.1

Summary

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.

Timeline

Oct 31 '12
PRSFiled by ERCOT
- 496NPRR-01 Revise West Hub Definition Due to Permanent Topology Oct 31 '12 · Revision Request
- 496NPRR-02 Impact Analysis 103112 Oct 31 '12 · Staff Report
Nov 15 '12
PRS Protocol Revision Subcommittee (PRS) Meeting
PRSRecommended for Approval Recommended for approval
“To recommend approval of NPRR496 as submitted” — Passed

→ PRS IA Review
Dec 13 '12
PRS Protocol Revision Subcommittee (PRS) Meeting
PRSRecommended for Approval Recommended for approval Forwarded → TAC
“To endorse and forward the 11/15/12 PRS Report and Impact Analysis for NPRR496 to TAC” — Passed

→ TAC Consideration
- 496NPRR-03 PRS Report 111512 Nov 20 '12 · Committee Report
Jan 3 '13
TAC Technical Advisory Committee (TAC) Meeting
TACRecommended for Approval Recommended for approval
“To recommend approval of NPRR496 as recommended by PRS in the 12/13/12 PRS Report” — Passed

→ ERCOT Board Consideration
- 496NPRR-04 PRS Report 121312 Dec 18 '12 · Committee Report
Mar 19 '13
BOARD Board of Directors Meeting
BOARDApproved Approved
“To approve NPRR496 as recommended by TAC in the 1/3/13 TAC Report” — Passed
- 496NPRR-05 TAC Report 010313 Jan 4 '13 · Committee Report
—
Posted since the last meeting
- 496NPRR-06 Board Report 031913 Mar 22 '13 · Committee Report