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NOTICE DATE: September 7, 2017
NOTICE TYPE: M-A090717-01 Extracts
SHORT DESCRIPTION: Missed Reports due to SCED Publishing Issues during Operating Day September 6, 2017
INTENDED AUDIENCE: ERCOT Market Participants
DAYS AFFECTED: September 6, 2017
LONG DESCRIPTION: During the early morning of September 6, 2017 for the Security-Constrained Economic Dispatch (SCED) executions from 00:03:11 to 00:45:11, ERCOT encountered issues publishing the SCED solutions to the database. Only parts of the SCED solutions were successfully published to the databases including Resource Base Points and Resource LMPs. Therefore, the SCED dispatch was not impacted by this issue. However, some SCED post-processes including SCED Settlement Point Prices calculation may be impacted. As a result of incomplete publishing of SCED solutions in the database, several of the Current Day Reports (CDR) and their counterpart Public Dashboards associated with those specific SCED intervals may have been impacted.
ERCOT will be performing a price correction for this period, per the public market notification that was posted on September 6, 2017 at 17:03:15. Corrected prices will be posted in the RTM Price Corrections report (NP4-197-M) on the MIS Public Area. Market Participants who previously downloaded pricing reports or obtained prices from External Web Services for 09/06/2017 should refer to the RTM Price Corrections report for updated information. Price corrections will be posted on the MIS Public Area as soon as possible but no later than 16:00 on September 8, 2017.
ERCOT is also currently analyzing data that is used in any post Operating Day reports, which includes all 48-Hour Disclosure Reports. Due to this additional validation, some reports may post later than expected.
Listed below are the CDR reports and intervals affected during this time:
Report Name
EMIL ID
Report ID
Intervals Affected
Report Status
Summary Report of HDL and LDL
NP6-915-CD
13081
11 intervals between 00:03-00:45
Missing - will not be rerun
Real-Time ORDC and Reliability Deployment Price Adders and Reserves by SCED Interval
NP6-323-CD
13221
11 intervals between 00:03-00:45
Missing - will not be rerun. Corrected prices for the affected intervals will be posted on the MIS Public Area.
SCED Shadow Prices and Binding Transmission Constraints
NP6-86-CD
12302
1 interval at 01:00
Posted with incomplete data. Corrected prices for the affected intervals will be posted on the MIS Public Area.
SCED Shift Factors
SYS-608-CD
12354
1 interval at 01:00
Posted with data missing for the affected interval - will not be rerun
Real-Time ORDC and Reliability Deployment Prices for 15-minute Settlement Interval
NP6-324-CD
13220
4 intervals at 00:15, 00:30, 00:45, 01:00
Posted with impacted data.
Corrected prices for the affected intervals will be posted on the MIS Public Area.
LMPs by Electrical Buses
NP6-787-CD
11485
11 intervals between 00:03-00:45
Posted with impacted data.
Corrected prices for the affected intervals will be posted on the MIS Public Area.
LMPs by Resource Nodes, Load Zones, and Trading Hubs (Dashboard 10.a and 10.b)
NP6-788-CD
12300
11 intervals between 00:03-00:45
Posted with impacted data.
Corrected prices for the affected intervals will be posted on the MIS Public Area.
Settlement Point Prices at Resource Nodes and Hubs and Load Zones
NP6-905-CD
12301
4 intervals at 00:15, 00:30, 00:45, 01:00
Posted with impacted data.
Corrected prices for the affected intervals will be posted on the MIS Public Area.
CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask]<mailto:[log in to unmask]>.
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