Network Operations Model Change Schedule

ERCOT Protocols broadly delineate modeling requirements for different segments of the ERCOT market. The information on this page is intended to more clearly define the expectations ERCOT has for market participants as they help to maintain the accuracy of the ERCOT Network Operations Model (NOM) through the submission of model and outage data.

The table below represents a schedule of planned updates to the ERCOT NOM through the Network Model Management System (NMMS) in accordance with Nodal Protocol Section 3.10. Each row of dates is in support of a planned Common Information Model (CIM) database load (column labeled “Nodal DB Load”). This calendar is applicable to all network topology, registered Resource parameter, QSE-to-Resource relationship and telemetry changes submitted by Transmission Service Providers (TSPs), Resource Entities (REs), and Qualified Scheduling Entities (QSEs). Refer to the Modeling Expectations document for additional information on NOM update process.

Interim Updates: Network Operations Model Change Requests (NOMCRs) that are submitted outside of the normal timelines are classified as Interim Updates and included in the Network Model if they are needed to correct unintentional modeling inconsistencies, are required for system restoration after a storm or are a correction to previously submitted impedances or ratings. Interim Updates will be reported to the Public Utility Commission of Texas (PUCT) Staff and the Independent Market Monitor (IMM).

Interim Update Classification:

Class 1 Interim Update requests that do not have to be modeled in production immediately due to either the nature of the change or the timing of the energization.

Class 2 Interim Updates that need to be modeled in production immediately, but can be represented with Downstream Production Changes (DPCs).

Class 3 Interim Updates that need to be modeled immediately and may require an Emergency Database Load.

Telemetry Points Updates: ERCOT Protocols consider telemetry point additions and changes submitted 20 days prior to the NOM load date as non-interim updates. Protocols allow ERCOT five days to process NOMCR requests. ICCP data must be in compliance with the ERCOT Nodal ICCP Communication Handbook in accordance with Nodal Operating Guide Section 7.2, ERCOT ICCP Interface and Section 7.3, Telemetry.

QSE NDCRC Submittals: The Net Dependable Capability and Reactive Capability (NDCRC) application allows QSEs with Generation Resources to submit the ERCOT required seasonal High Sustained Limit (HSL), biennial unit reactive tests and results of the unannounced tests online, as well as other test data. Such revisions must also be submitted through a Resource Asset Registration Form (RARF) by the RE in order to be uploaded into the NOM. When submitting RARF with updated unit test data, the RE is to note this on Service Request.

Network Operations Model Change Schedule

Period 1 requests would be submissions that miss the normal deadline by ten days or less. At this point in the validation process, ERCOT is still processing the NOMCRs for the Target Month and has not completed the models that will be used in production.

Period 2 immediately follows Period 1 and ends 20 days prior to the database load date. The length of Period 2 will vary for each model depending on when the model is scheduled to be put into production. During Period 2, the Operational Models undergo Initial Validation and are posted. In addition, the information needed to build the Congestion Revenue Right (CRR) models is exported.

Period 3 immediately follows Period 2 and ends two days before the model goes into production. At this point in the validation process, the final production models have been completed and are being validated for use in production. Period 3 will typically be about 20 days in length.

Period 4 immediately follows Period 3, beginning two days prior to the time the model is scheduled to be loaded into production. Interim Updates allowed during Period 4 will require an Emergency Data Base load.

NOM Update Schedule Definitions:

Common Information Model (CIM) ID: CIM ID corresponding to NOM update schedule. The CIM is used to describe the ERCOT transmission system topology consisting of Transmission Elements, including all the parameters needed to describe the Transmission Elements and how they interrelate to one another.

Deadline for Model Change (Submitted Before): This date is the 90-day cut-off for submittal of network topology and Resource parameter changes that will not be considered as Interim Update. ERCOT request that registration of a NEW Generation Resource, required to be represented in the NOM, be submitted beginning 120 days prior to the first Operating Day of the interconnection. Refer to New Generation Resources -- Steps to Register page for further details.

ICCP and Relationship Notice: The RE and associated QSE are encouraged to coordinate changes in relationships according to the dates listed under the column heading “ICCP and Relationship Notice” of the schedule below. The RE and QSE are to refer to the Network Operations Model Change Schedule when establishing an effective date when a new Resource interconnection is first energized, when a new QSE first represents a Resource or when a Resource changes a QSE.

Market Validation End Date: Operational Models undergo Initial Validation and are posted to ERCOT MIS for Market Validation at the start of this period. The CRR Auction corresponds with the completion of Market Validation. Final validation by ERCOT commences after this date before scheduled model load.

Nodal DB Load: Date production ready NOM is loaded and used.

CIM	Deadline for Model Change [submitted before]	ICCP and Relationship Notice	Market Validation End Date	Nodal DB Load
2012Jan.L1	10/01/2011	12/09/2011	12/14/2011	12/29/2011
2012Jan.L2	10/01/2011	12/21/2011	12/14/2011	01/10/2012
2012Jan.L3	10/01/2011	12/29/2011	12/14/2011	01/18/2012
2012Jan.L4	10/01/2011	01/05/2012	12/14/2011	01/25/2012
2012Feb.L1	11/01/2011	01/12/2012	01/14/2012	02/01/2012
2012Feb.L2	11/01/2011	01/19/2012	01/14/2012	02/08/2012
2012Feb.L3	11/01/2011	01/26/2012	01/14/2012	02/15/2012
2012Feb.L4	11/01/2011	02/02/2012	01/14/2012	02/22/2012
2012Mar.L1	12/01/2011	02/10/2012	02/14/2012	03/01/2012
2012Mar.L2	12/01/2011	02/17/2012	02/14/2012	03/08/2012
2012Mar.L3	12/01/2011	02/24/2012	02/14/2012	03/15/2012
2012Mar.L4	12/01/2011	03/02/2012	02/14/2012	03/22/2012
2012Apr.L1	01/01/2012	03/10/2012	03/14/2012	03/30/2012
2012Apr.L2	01/01/2012	03/22/2012	03/14/2012	04/11/2012
2012Apr.L3	01/01/2012	03/29/2012	03/14/2012	04/18/2012
2012Apr.L4	01/01/2012	04/04/2012	03/14/2012	04/24/2012
2012May.L1	02/01/2012	04/11/2012	04/14/2012	05/01/2012
2012May.L2	02/01/2012	04/19/2012	04/14/2012	05/09/2012
2012May.L3	02/01/2012	04/26/2012	04/14/2012	05/16/2012
2012May.L4	02/01/2012	05/03/2012	04/14/2012	05/23/2012
2012Jun.L1	03/01/2012	05/12/2012	05/14/2012	06/01/2012
2012Jun.L2	03/01/2012	05/18/2012	05/14/2012	06/07/2012
2012Jun.L3	03/01/2012	05/24/2012	05/14/2012	06/13/2012
2012Jun.L4	03/01/2012	05/31/2012	05/14/2012	06/20/2012
2012Jul.L1	04/01/2012	06/09/2012	06/14/2012	06/29/2012
2012Jul.L2	04/01/2012	06/21/2012	06/14/2012	07/11/2012
2012Jul.L3	04/01/2012	06/28/2012	06/14/2012	07/18/2012
2012Jul.L4	04/01/2012	07/05/2012	06/14/2012	07/25/2012
2012Aug.L1	05/01/2012	07/12/2012	07/14/2012	08/01/2012
2012Aug.L2	05/01/2012	07/19/2012	07/14/2012	08/08/2012
2012Aug.L3	05/01/2012	07/26/2012	07/14/2012	08/15/2012
2012Aug.L4	05/01/2012	08/02/2012	07/14/2012	08/22/2012
2012Sep.L1	06/01/2012	08/11/2012	08/14/2012	08/31/2012
2012Sep.L2	06/01/2012	08/22/2012	08/14/2012	09/11/2012
2012Sep.L3	06/01/2012	08/29/2012	08/14/2012	09/18/2012
2012Oct.L1	07/01/2012	09/08/2012	09/14/2012	09/28/2012
2012Oct.L2	07/01/2012	09/20/2012	09/14/2012	10/10/2012
2012Oct.L3	07/01/2012	09/27/2012	09/14/2012	10/17/2012
2012Oct.L4	07/01/2012	10/04/2012	09/14/2012	10/24/2012
2012Nov.L1	08/01/2012	10/12/2012	10/14/2012	11/01/2012
2012Nov.L2	08/01/2012	10/18/2012	10/14/2012	11/07/2012
2012Nov.L3	08/01/2012	10/25/2012	10/14/2012	11/14/2012
2012Nov.L4	08/01/2012	11/01/2012	10/14/2012	11/21/2012
2012Dec.L1	09/01/2012	11/10/2012	11/14/2012	11/30/2012
2012Dec.L2	09/01/2012	11/22/2012	11/14/2012	12/12/2012
2012Dec.L3	09/01/2012	11/29/2012	11/14/2012	12/19/2012
2012Dec.L4	09/01/2012	12/08/2012	11/14/2012	12/28/2012
2013Jan.L1	10/01/2012	12/20/2012	12/14/2012	01/09/2013
2013Jan.L2	10/01/2012	12/27/2012	12/14/2012	01/16/2013
2013Jan.L3	10/01/2012	01/03/2013	12/14/2012	01/23/2013
2013Feb.L1	11/01/2012	01/12/2013	01/14/2013	01/31/2013
2013Feb.L2	11/01/2012	01/17/2013	01/14/2013	02/06/2013
2013Feb.L3	11/01/2012	01/24/2013	01/14/2013	02/13/2013
2013Feb.L4	11/01/2012	01/31/2013	01/14/2013	02/20/2013
2013Mar.L1	12/01/2012	02/09/2013	02/14/2013	03/01/2013
2013Mar.L2	12/01/2012	02/21/2013	02/14/2013	03/13/2013
2013Mar.L3	12/01/2012	02/28/2013	02/14/2013	03/20/2013
2013Mar.L4	12/01/2012	03/07/2013	02/14/2013	03/27/2013
2013Apr.L1	01/01/2013	03/13/2013	03/14/2013	04/02/2013
2013Apr.L2	01/01/2013	03/21/2013	03/14/2013	04/10/2013
2013Apr.L3	01/01/2013	03/28/2013	03/14/2013	04/17/2013
2013Apr.L4	01/01/2013	04/04/2013	03/14/2013	04/24/2013
2013May.L1	02/01/2013	04/11/2013	04/14/2013	05/01/2013
2013May.L2	02/01/2013	04/18/2013	04/14/2013	05/08/2013
2013May.L3	02/01/2013	04/25/2013	04/14/2013	05/15/2013
2013May.L4	02/01/2013	05/02/2013	04/14/2013	05/22/2013
2013Jun.L1	03/01/2013	05/15/2013	05/14/2013	06/04/2013
2013Jun.L2	03/01/2013	05/23/2013	05/14/2013	06/12/2013
2013Jun.L3	03/01/2013	05/30/2013	05/14/2013	06/19/2013
2013Jun.L4	03/01/2013	06/06/2013	05/14/2013	06/26/2013
2013Jul.L1	04/01/2013	06/12/2013	06/14/2013	07/02/2013
2013Jul.L2	04/01/2013	06/20/2013	06/14/2013	07/10/2013
2013Jul.L3	04/01/2013	06/27/2013	06/14/2013	07/17/2013
2013Jul.L4	04/01/2013	07/04/2013	06/14/2013	07/24/2013
2013Aug.L1	05/01/2013	07/12/2013	07/14/2013	08/01/2013
2013Aug.L2	05/01/2013	07/25/2013	07/14/2013	08/14/2013
2013Aug.L3	05/01/2013	08/01/2013	07/14/2013	08/21/2013
2013Aug.L4	05/01/2013	08/08/2013	07/14/2013	08/28/2013
2013Sep.L1	06/01/2013	08/15/2013	08/14/2013	09/04/2013
2013Sep.L2	06/01/2013	08/22/2013	08/14/2013	09/11/2013
2013Sep.L3	06/01/2013	08/29/2013	08/14/2013	09/18/2013
2013Sep.L4	06/01/2013	09/05/2013	08/14/2013	09/25/2013
2013Oct.L1	07/01/2013	09/11/2013	09/14/2013	10/02/2013
2013Oct.L2	07/01/2013	09/19/2013	09/14/2013	10/09/2013
2013Oct.L3	07/01/2013	09/26/2013	09/14/2013	10/16/2013
2013Oct.L4	07/01/2013	10/03/2013	09/14/2013	10/23/2013
2013Nov.L1	08/01/2013	10/12/2013	10/14/2013	10/31/2013
2013Nov.L2	08/01/2013	10/17/2013	10/14/2013	11/06/2013
2013Nov.L3	08/01/2013	10/24/2013	10/14/2013	11/13/2013
2013Nov.L4	08/01/2013	10/31/2013	10/14/2013	11/20/2013
2013Dec.L1	09/01/2013	11/13/2013	11/14/2013	12/03/2013
2013Dec.L2	09/01/2013	11/21/2013	11/14/2013	12/11/2013
2013Dec.L3	09/01/2013	11/28/2013	11/14/2013	12/18/2013
2013Dec.L4	09/01/2013	12/07/2013	11/14/2013	12/27/2013