Day-Ahead Desk / Document Control
Day-Ahead Market Desk
Version 4.7
April 24, 2015
Version 4.7 – April 24, 2015 / 1ERCOT Operating Procedure Manual
Day-Ahead Market Desk / Introduction
Document Control
Preparation
Date / Version / Description / Author(s)April 24, 2015 / 4.7 / Update Procedure to Verify DSI and DSP parameters. Add DAM System Lambda and Electrically Similar Settlement Point verification. Update ‘Postpone of Day-Ahead Market Solutions Posting’ section. Remove Credit Limit Adjustment section and minor edits. Adding PLATTS (FIP/FOP) language. / A. Moreno, C. Holden, N. Bezwada
August 8, 2014 / 4.6.2 / Updated 2.5.1 Update DAM to include any temporary operational actions section and minor edits / A. Moreno
April 22, 2014 / 4.6.1 / Remove RMR related sections and update with minor edits / A. Moreno
January 10, 2014 / 4.6 / Remove SFT related sections. Update steps for DAM run with AS Insufficiency / J. Jacobs, A. Moreno,N. Smith, K.Li
July 10, 2013 / 4.5.1 / Update section on temporary operational actions / C. Bivens
June 12, 2013 / 4.5 / Remove Daily CCT per NPRR520 / K. Li
May 9, 2013 / 4.4.2 / Updated steps checking PSS/E posting / K. Li
April 23, 2013 / 4.4.1 / Updated Daily CCT / K. Li
December 19, 2012 / 4.3.1 / Added ‘Check Creditworthiness of QSEs w/Resources’ / A. Moreno
December 6, 2012 / 4.4 / Updated with Real Time PTP Option Modeling (NPRR322) and Daily CCT(NPRR469 and 472) / K. Li
August 24, 2012 / 4.3 / Updated ESSP. / K. Li
March 16, 2012 / 4.2 / Added selection of audience to notices sent. Added ERCOT.com display check & updated Attachment 2 to reflect current practices / A. Moreno, R. Staples,
R. Villarreal, N. Smith
January 19, 2012 / 4.1 / Added ESSP, PSS/E, & Helpdesk procedures/steps and updated AS Insufficiency Steps & Credit check / K. Li, A. Moreno,
R. Villarreal, N. Smith
September 14, 2011 / 4.0 / Updated Clear Day-Ahead Market section to reflect updates to the way the market is cleared / A. Moreno, R. Staples
August 5, 2011 / 3.9 / Deleted step for manual posting of report and updated to reflect manual run of another event after DAM publishing / R. Staples
July 13, 2011 / 3.8 / Updated sections relating to Daily CCT. Deleted COP Verification & Phase Shifter Settings sections and made other minor edits / K. Li, A. Moreno,
R. Staples, C. Tucker
April 25, 2011 / 3.7 / Added appendix containing operational assumptions and configurations / C. Tucker
March 25, 2011 / 3.6 / Updated to include handling of Generic Constraints in CCT / K. Li
March 21, 2011 / 3.5 / Updated to include tasks that have now become part of the daily duties of the DAM Operator / A. Moreno, R. Staples
January 7, 2011 / 3.4 / Updated based on feedback from DAM Operators, DAM Support, and DAM Manager / A. Moreno, R. Staples
November 30, 2010 / 3.3 / Updated based on additional feedback from DAM Operators, DAM Support, and Market Reform Analyst / A. Moreno, R. Staples
November 5, 2010 / 3.2 / Updated based on feedback from DAM Operators and Market Reform Analyst / A. Moreno, S. Jacobs, R. Staples
October 11, 2010 / 3.1 / Reviewed and updated in preparation for Go-Live. / A. Moreno, N. Smith,
R. Staples, S. Jacobs
September 3, 2010 / 3.0 / Update procedures for settings and new Action Plans received from Operations Support / R. Staples,
S. Jacobs
July 21, 2010 / 3.0 / Update procedures for AS Insufficiency / R. Staples, A. Moreno
June 1, 2010 / 2.1 / Update procedures based on Market Trials 4 review / Y. Ren, R. Staples,
DAM Operators
April 14, 2010 / 2.0 Rev 3 / Update procedures based on Market Trials 4 / N. Smith, Y. Ren,
A. Moreno,C. Hansen
January 8, 2010 / 2.0 Rev 2 / Update language changed by Protocols and clean up previous version / R. Staples,
A. Moreno, Y. Ren
October 4, 2008 / 2.0 Rev 1 / Incorporate comments from Reliant, Luminant, and PGC / Y. Ren,
M. Patterson
August 12, 2008 / 1.0 / Revision 2 / Y. Ren, M. Patterson
August 5, 2008 / 1.0 / Revision 1 / Y. Ren, X. Ma,
K. Methaprayoon,
M. Patterson
August 4, 2008 / 1.0 / Original draft / Y. Ren, X. Ma
Table of Contents
Document Control
1.Introduction
1.1Purpose
1.2Scope
1.3Associated Documents
1.5General Duties
2.Tasks
2.1DAM Desk/Helpdesk Staffing Crosscheck
2.2Review ERCOT System Conditions
2.2.1Verify the MIS postings for the next Operating Day
2.2.2Monitor / Review External System Data Interfaces
2.2.3Copy EMSI Data forward for all applications
2.3Create the Electrically Similar SP List and PSS/E files in the Day-Ahead
2.3.1 Create the Electrically Similar SP List and PSS/E files in the Day-Ahead
2.4Phase II Validations of DAM Submissions
2.4.1Review QSE Counter-Party’s Credit Limits
2.4.2Initiate Phase II Validation Process
2.4.3Review Phase II Validation Report
2.5Review and Update DAM to Account for modifications to Remedial Action Schemes received from Operations Support
2.5.1Update DAM to include any temporary operational actions
2.6Perform DAM Input Data Processes
2.6.1Monitor / Review DAM Submissions and Validations
2.6.2Verify DAM Configuration Parameter Settings
2.7Execute DAM Clearing Process
2.7.1Check DAM Submission Close Event
2.7.2Check Creditworthiness of QSEs w/Resources
2.7.3Clear Day-Ahead Market
2.7.4Notify Market Participants of DAM awards and Verify MIS Posting
2.8Manage Post-DAM Processes
2.8.1 Prepare the Day-Ahead Market Summary Report (Prior to end of shift)
2.8.2Validate / Correct DAM Prices
2.9Manage Day-Ahead Issues
2.9.1Manage Day-Ahead Issues
2.10Manage DAM Timeline deviations
2.10.1Postpone Phase II Validation
2.10.2Postpone Day-Ahead Market Submission Close Timeline
2.10.3Postpone of Day-Ahead Market Solutions Posting
2.10.4Abort the Day-Ahead Market Clearing
2.10.5Emergency Operations
3. Attachments/Appendices
3.1Attachment 1: DAM Parameter Settings
3.2Attachment 2: Day-Ahead Market Operational Assumptions and Configurations
1.Introduction
1.1Purpose
- This document provides the ERCOT Day-Ahead Market (DAM) Desk with the detailed procedures requiredfor performingDAM duties. The DAM Desk position is responsible for the oversight of DAMoperationsin full compliance withNodal Protocols and ERCOT procedures. Oversight includes all aspects associated with the preparationand execution of the DAM, includingmonitoring participant submission validations and posting DAM results to participants and the Market Information System (MIS). If the DAM Desk procedures and Nodal protocols conflict, the Nodal Protocols will apply.
- The Day-Ahead Market normally commences at 0600 and concludes at 1330 on the day prior to the Operating Day.
1.2Scope
- The instructions contained in this procedure document are limited to those required for the DAM Desk. Instructions for other ERCOT nodal market positions are contained in separate procedure documents, one for each position. This procedure does not imply that the duties contained herein are the only duties to be performed by this position, nor do these procedures foresee all possible circumstances where the Operators judgment may result in deviations as required to facilitate a market. The individuals assigned to this position will be required to follow other instructions and perform other duties as required, or requested, by appropriate ERCOT supervision.
- DAM support engineers are the reviewers of this document, and the approver is the DAM Manager.
1.3Associated Documents
- ERCOT Nodal Protocols
1.4Roles/Responsibilities
DAM Desk Supervisor
The DAM DeskSupervisor is responsible for the supervision of the DAM Desk position and may at times be responsible for performing the procedures contained in this manual.
DAM Desk Operator
The DAM Desk Operator is primarily responsible for carrying out the subsequent tasks that are described in this document. In some instances the DAM Desk activities, as described in this document, may be performed by DAM Support personnel.
1.5General Duties
Operate the DAM market every day including weekends and ERCOT Holidays from 0500 to 1330 one day prior to the Operating Day.
Respond to Market Participant questions and issues after being screened internally.
oReceive questions and issues from Market Participants as they are funneled to the DAM Desk. Escalate issues to ERCOT Management as needed to resolve issues prior to market deadlines.
oRespond/provide answers to Market Participant questions and issues when appropriate information is available.
oMaintain record of Market Participant questions, issues, and resolutions.
oRefer any unresolved questions or issues to DAM Support or the DAM Desk Supervisor.
Version 4.7 – April 24, 2015 / 1ERCOT Operating Procedure Manual
Day-Ahead Market Desk
2.Tasks
2.1DAM Desk/Helpdesk Staffing Crosscheck
Call the helpdesk upon arrival prior to 0515 to ensure the Day-Ahead tasks are on track.
2.2Review ERCOT System Conditions
On a daily basis in the Day-Ahead, the DAM Desk reviews the following ERCOT system conditions:
Verify that the postings required on the MIS for the next Operating Day are available to Market Participants.
Monitor / Review External System Data Interface
Copy EMSI Data forward for all applications
2.2.1Verify the MIS postings for the next Operating Day
Step # / Procedural StepsNOTE / The postings required on the MIS for the next Operating Day are from different ERCOT sources.The DAM Desk Operator shall verify that the postings required on the MIS for the next Operating Day are availableto Market Participants. Recommended start time for this task is 0515. This task should be completed by 0600.
1 / LOG on to MIS.
2 / IF DAM workarounds need to be communicated (ex. DAM disabled contingencies, Generic Constraint Limits), NOTIFY Market Participants by sending out an OCN notice with “Medium” priority and an audience of “All MPs” using Notice Builder via MIS.
3 / NAVIGATE to the applicable MIS displays for the postings and VERIFY the postings required for the next Operating Day are available:
- Transmission network conditions for the DAM period:
oWeather Assumptions (Markets -> Day-Ahead Market)
oLoad Forecast Distribution Factors (Markets -> Day-Ahead Market)
oForecasted Distribution Loss Factors Report (Markets -> Data Aggregation)
oForecasted Transmission Loss Factors Report (Markets -> Data Aggregation)
oSettlement Points List and Electrical Buses Mapping (Markets -> Day-Ahead Market)
oWeekly RUC Active and Binding Transmission Constraints (Grid -> Generation)
- DAM Ancillary Service Plan (Markets -> Day-Ahead Market)
- QSE Ancillary Service Obligations (View using Mimic function in Applications -> Market Manager)
Peaker Net Margin (Markets -> Real-Time Market)NOTE:Posting on Previous Day
System-Wide Offer Cap (Markets -> Real-Time Market)
- QSE Load Ratio Share (View using Mimic function at Reports -> Reports and Extracts Index)
- Wind Generation Resource Power Potential Forecast (View using Mimic function in Reports -> Reports and Extracts Index)
- Wind Power Production – Hourly averaged actual and forecasted values (Grid -> Forecasts
- Seven-Day Load Forecast by Load Zone (Grid -> Forecasts)
- Seven-Day Load Forecast by Weather Zone (Grid -> Forecasts)
4 / IF any problems with postings are found, NOTIFY Market Participantsby sending out an Advisory noticewith “Medium” priority and an audience of “All MPs” using Notice Builder via MIS. For resolution of the problem, refer to Manage Day-Ahead Issues.
The recommended message to be sent to Market Participants is as follows:
ERCOT has discovered issues with the following MIS postings for Operating Day Month DD, YYYY
<Enter list of postings here>
These issues are currently under investigation. Please <Enter action you would like MPs to take>. A notice will be sent out once the issue has been resolved.
5 / INFORM DAM Desk Supervisor if any DAM timing deviation must be executed. Refer to Manage DAM Timeline deviations, if a deviation is necessary.
2.2.2Monitor / Review External System Data Interfaces
Step # / Procedural StepsNOTE / MMS data interfaces from External Systems shall be monitored and reviewed to resolve any data interface problems as soon as possible. Recommended start time for this task is 0515. This task should be completed by 0600.
1 / Navigate to the MOI Events display for the status of External System Interfaces.
2 / Check for the existence of any Warning or Error messages pointing to potential problems with the following External System interfaces. This includes but is not limited to:
Energy Management System (EMS) – Refer to EMSI Workflow
Congestion Revenue Right (CRR) System – CRR_TO_MI Event
Credit System – CMM_TO_MI Event
Outage Scheduler (OS) – Refer to EMSI Workflow
Settlement System – STL_TO_MI Event
Registration – MF_TO_DS Event
- PLATTS (FIP/FOP)-PLATTS_TO_MI (Runs day before)*
3 / COMMUNICATE to Helpdesk and ERCOT Production Support group if any transfer problems are identified and inform DAM Supervisor.
4 / Log the actions or workaround measures taken by ERCOT internal groups to ensure the normal operation of External System Interfaces.
2.2.3Copy EMSI Data forward for all applications
Step # / Procedural StepsNOTE / In order for the DAM applications to have recent EMS data, data needs to be copied for DAM. Recommended start time for this task is 0500. This task should be completed by 0515.
1 / Navigate to “EMSI Workflow” display.
2 / VERIFY EMSI has completed successfully without errors for the run that begins at about 0450. If there were errors, refer to Manage Day-Ahead Issues.
3 / CLICK on “Copy_EMSI_data_for_DAM” button.
A pop-up stating that “Wait for few minutes until another message dialog ‘Procedure executed: db_copycat’ popuped.” should appear.
After no more than ten minutes, another pop-up that contains the wording “Stored Procedure Executed: call DB_COPYCAT(‘BMSPARMY’,’BMSPARMZ’)” should appear. Data has been copied for DAM applications once this pop-up appears.
If either pop-up does not appear navigate to EMSI Workflow Messages and verify “Copy_EMSI_data_for_DAM” has started and completed. If EMSI Workflow Messages are not present refer to Manage Day-Ahead Issues.
2.3Create the Electrically Similar SP List and PSS/E files in the Day-Ahead
The DAM Desk Operator shall create and publish a current list of Electrically Similar Settlement Points (ESSPs) and a Network Operations Model in PSS/E format no later than 0600 in the Day-Ahead.
2.3.1 Create the Electrically Similar SP List and PSS/E files in the Day-Ahead
Step # / Procedural StepsNOTE / The DAM Desk Operator shall create a current list of ESSPs and PSS/E files and publish results into the MMS database and the MIS Secure Area. Recommended start time for this task is 0515. This task shall be completed by 0550.
This task includes performing the following activities:
Check EMSI is completed
Perform/monitor the execution of the ESSP application
Review the ESSP results
Publish the ESSP results to the MMS database
Archive an ESSP save case
Publish PSS/E files to the MIS
1 / VERIFY EMSIhas been copied.
2 / Navigate to the MOI “ESSP Workflow” display. Verify ESSP Workflow is down and verify “Publish ESSP Results” is set to NO.
3 / START Up the ESSP workflow.
4 / Verify that the ESSP Workflow statuses shown on the MOI for each of ESSP functional modules (DSI, NDP and SAV)) are normal in Green color and “Up” status.
5 / NAVIGATE to “ESSP Execution Control Parameters” of “ESSP Displays” and set:
Retrieve MF Interface Data – “Yes”
Retrieve MI Interface Data – “Yes”
Retrieve EMS Interface Data – “Yes”
Use Save Case – “No”
NAVIGATE to “ESSP Workflow Parameters” and set “Execute SAV” to “ON”
6 / execute ESSP workflow by pressing “Run All”’ button.
7 / MONITOR the “ESSPWorkflow Messages” display and the following messages shall be observed:
- Start of the Electrically Similar Settlement Point Determination Run
- ESSP publishing is skipped
8 / verify the ESSP application completes successfully by observing the following message:
- End of the Electrically Similar Settlement Point Determination Run
9 / Navigate to the MOI -> ESSP Displays -> “Electrically Similar Settlement Point (ESSP)” display.
10 / verify Electrically Similar Settlement Points have been created successfully.
11 / Navigate to the MOI “ESSP Workflow” display
12 / set the “Publish ESSP Results” flag to “Yes”
13 / Publish ESSP results by pressing “NDP” button.
14 / Navigate to the MOI “ESSP Workflow Message” display.
15 / MONITOR the “ESSPWorkflow Messages” display to ensure publishing is successful.
16 / NAVIGATE to the MI MOI “Events” display and verify the event “PSSE_FILE_DATA” completed successfully.
If this event is not completed, refer to Manage Day-Ahead Issues.
17 / verify ESSP results are published to MIS.
NOTE: ESSP results will not be published until 0555.
If the ESSP results are not posted, verify the ESSP list is in the database and then, contact ERCOT Web Services Support to manually post this report with a Report ID of NP4-158 and the appropriate BATCH_ID located in the ‘ESSP Workflow Messages’.
If the ESSP results are not in the database or are not correct, refer to Manage Day-Ahead Issues.
18 / verify PSS/E files are published to MIS.
NOTE: PSS/E files publication is triggered by the completion of ESSP workflow.
If the PSS/E files are NOT posted within five minutes after the completion of ESSP workflow, check if the PSS/E file creation event, PSS/E files, or publication messages are executed /created successfully in MMS:
If the PSS/E files creation event is NOT executed successfully
- Manually run the PSS/E file creation event and check PSS/E files and posting
- Contact EMMS Production Support to get a copy of the PSS/E files
- Manually drop them at MIS Drop Off location at
- If the final posting is after 0600, send a Market Notice
- Notify the posting issue to HelpDesk, ERCOT TIBCO OnCall, and ERCOT EMMS Production.
- Notify EMMS Production Support and HelpDesk
- Re run ESSP workflow if time allowed
- If PSS/E files are NOT able to be posted by 0600, send a Market Notice and refer to Manage Day-Ahead Issues.
- Check and remove any duplicate ESSP reports via HelpDesk and EIS Production Support
19 / VERIFY Electrical Bus Mapping for Heuristic Pricing file is published to MIS. This file will not be published until 0550.
If the Electrical Bus Mapping for Heuristic Pricing results are not on the MIS or not correct, refer to Manage Day-Ahead Issues.
20 / SHUT DOWN ESSP workflow by clicking the “Shut Down” button.
2.4Phase II Validations of DAM Submissions
The DAM Desk performs the following procedures to prepare required data for Phase II validation of DAM submissions:
ReviewCounter-Party’s Credit Limits