SCR759

Title:	acLineSegment Name Length Increase in Information Model Manager
Next Group:
Next Step:	Parking Deck - Impact Analysis and budget review
Status:	Approved on 09/21/2010

Date	Gov Body		Next Steps
09/21/2010	Board of Directors	Approved	Parking Deck - Impact Analysis and budget review
09/02/2010	TAC	Recommended for Approval	ERCOT Board consideration of SCR759
08/19/2010	PRS	Recommended for Approval	TAC consideration of SCR759
08/12/2010	ROS	Recommended for Approval	PRS priority assignment
07/15/2010	ROS	Recommended for Approval	ROS Impact Analysis review

Date	Gov Body	Motion	Result	Against	Abstentions
09/21/2010	Board of Directors	To approve SCR759 as recommended by TAC in the 9/2/10 TAC Report.	Passed
09/02/2010	TAC	To recommend approval of SCR759 as recommended by PRS in the 8/19/10 PRS Report with a priority of High.	Passed	0	0
08/19/2010	PRS	To recommend a priority of High for SCR759.	Passed	0	0
08/12/2010	ROS	To endorse and forward the 7/15/10 ROS Report and Impact Analysis for SCR759 to TAC with a recommended priority of High.	Passed	0	0
07/15/2010	ROS	To recommend approval of SCR759 as submitted.	Passed	0	0

Status:	Approved
Date Posted:	05/27/2010
Sponsor:	SSWG
Urgent:	No
Sections:	N/A
Description:	This System Change Request (SCR) proposes to increase the allowable character size of the acLineSegment type under the Line Equipment Container from two to 14 in the Information Model Manager.
Reason:	Multi-section line models have been used by transmission planners in Siemens Power System Simulator for Engineering (PSSE) power flow software for over 20 years as a tool for correctly simulating contingencies on the ERCOT System for planning studies. The Topology Processor enhancement approved by ERCOT in April 2010 to add multi-section line definitions to the raw file output requires all line segments of the multi-section line to be modeled under the same Line Equipment Container in the Network Operations Model. The reason that some Transmission Service Providers (TSPs) are not modeling line segments in this manner in the Information Model Manager is that the acLineSegment name is currently limited to two characters, which is too limiting for many TSPs line segment IDs. To be able to make this change to the Network Operations Model, the acLineSegment name must be increased. If this increased name size is not changed, the multi-section line functionality of the Topology Processor cannot be utilized.