Market Information System Grid and Market Conditions

Operations Messages

This section contains important messages from the ERCOT Control Room. Refresh this screen to see current operation messages. (Subscribe to Operations Messages Feed RSS feed.)

May 2021 Jun 2021 Jul 2021 Aug 2021 Sep 2021 Oct 2021
Date Message Type Status
Oct 17 2021 08:47:15 CST The Daily RSASM for Sunday, October 17, 2021 will not be occurring due to zero participating QSE's. Operational Information Active
Oct 17 2021 00:58:26 CST No sudden loss of generation greater than 450 MW occurred on October 16, 2021. Operational Information Active
Oct 16 2021 08:47:22 CST The Daily RSASM for Saturday, October 16, 2021 will not be occurring due to zero participating QSE's. Operational Information Active
Oct 16 2021 01:02:41 CST No sudden loss of generation greater than 450 MW occurred on October 15, 2021. Operational Information Active
Oct 15 2021 16:59:58 CST Notification of DAM prices under investigation: A Generic Transmission Constraint (GTC) that was incorrectly modeled in the DAM for Operating Days (ODs) October 7 to 13, 2021, may have impacted DAM prices for ODs October 7 to 12, 2021. The investigation of prices is ongoing, and ERCOT will provide notice when the investigation is complete. Alert Active
Oct 15 2021 10:47:24 CST DC Tie Outage: ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 10/12/2021 06:00 through 10/15/2021 16:30 due to a planned outage. Operational Information Cancelled
Oct 15 2021 08:49:04 CST The Daily RSASM for Friday, October 15, 2021 will not be occurring due to zero participating QSE's. Operational Information Active
Oct 15 2021 08:28:00 CST ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for the Aspermont-Paint Creek outage. Operational Information Cancelled
Oct 15 2021 07:37:20 CST ERCOT is taking manual actions to pre-posture for the Aspermont-Paint Creek outage. Operational Information Active
Oct 15 2021 04:16:49 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 02:35 for operating day 10/15/21 for HE 07-12 for 56.5 MW of non-spin Operational Information Cancelled
Oct 15 2021 04:13:43 CST ERCOT has cancelled the following notice: ERCOT is working from alternate Control Center. Operational Information Cancelled
Oct 15 2021 04:13:31 CST ERCOT working from Primary CC: ERCOT will be working from the primary control center until further notice, use the OPX numbers for Taylor. Operational Information Active
Oct 15 2021 02:05:22 CST ERCOT will execute a SASM at 02:35 for operating day 10/15/21 for HE 07-12 for 56.5 MW of non-spin Operational Information Active
Oct 15 2021 00:02:22 CST No sudden loss of generation greater than 450 MW occurred on October 14, 2021. Operational Information Active
Oct 14 2021 16:12:48 CST ERCOT is working from alternate Control Center. Operational Information Active
Oct 14 2021 13:25:56 CST DAM Shift Factor Report Delay: ERCOT has identified the following MIS posting as delayed for Operating Day 10/15/2021: DAM Shift Factors. The report will be published after 13:30. Operational Information Active
Oct 14 2021 11:33:57 CST Market price correction for DAM. ERCOT has identified that one Generic Transmission Constraint (GTC) was incorrectly modeled in DAM for Operating Day (OD) 10/13/2021. ERCOT has also completed the price analysis, and determined that a price correction is warranted under Protocol Section 4.5.3. ERCOT will correct affected DAM prices for OD 10/13/2021. Complete price correction data will be posted on the Market Information System as soon as possible, but no later than 10AM on 10/15/20201. Alert Active
Oct 14 2021 10:58:14 CST The Laredo VFT (LARDVFT) transformer “VFT_1” will be unavailable on Monday 10/18/21 at 08:00 until Friday 10/22/21 at 16:00 for annual maintenance. Operational Information Active
Oct 14 2021 08:47:12 CST The Daily RSASM for Thursday, October 14, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Oct 14 2021 00:07:33 CST No sudden loss of generation greater than 450 MW occurred on October 13, 2021. Operational Information Active
Oct 13 2021 13:52:27 CST DC Tie Outage: The DC_N (North) DC Tie will be unavailable from 10/26/2021 07:30 through 10/27/2021 16:00 due to a planned outage. Operational Information Active
Oct 13 2021 12:44:47 CST ERCOT has cancelled the following notice: ERCOT has been notified that the Railroad DC Tie derate to 150 MW Import/Export due to Station 1 reactive power control issue, which was originally posted at 23:27 CDT on 09/28/21, remains in effect through 16:00 CDT on Friday, 10/22/21. Advisory Cancelled
Oct 13 2021 09:54:37 CST Cancelled RUC commitment at timestamp 10/13/21 09:32 for B_DAVIS_CC1_1 for 10/13/21 HE 1600- HE 2200 due to unintended commitment. Operational Information Active
Oct 13 2021 08:46:54 CST The Daily RSASM for Wednesday, October 13, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Oct 13 2021 01:15:25 CST No sudden loss of generation greater than 450 MW occurred on October 12, 2021. Operational Information Active
Oct 12 2021 08:46:39 CST The Daily RSASM for Tuesday, October 12, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Oct 12 2021 06:20:03 CST DC Tie Outage: The DC_E (East) DC Tie will be unavailable from 10/12/2021 06:00 through 10/15/2021 16:30 due to a planned outage. Operational Information Active
Oct 12 2021 00:02:38 CST No sudden loss of generation greater than 450 MW occurred on October 11, 2021. Operational Information Active
Oct 11 2021 21:03:48 CST ERCOT has cancelled the following notice: At [13:00], ERCOT has updated the AAN for a possible future Emergency Condition of reserve capacity deficiency beginning October 11, 2021 HE 15 until October 11, 2021 HE 21 based on changed conditions. QSEs have updated their Resource COPs and their Outage Scheduler. At this time, ERCOT does not seek additional capacity and will not be issuing any Outage Scheduler Adjustment (OSA) at this time. ERCOT has posted an updated AAN Planning Assessment for reference. OCN Cancelled
Oct 11 2021 21:02:43 CST ERCOT has cancelled the following notice: DAM is complete, DRUC will begin at 1719. Operational Information Cancelled
Oct 11 2021 18:56:01 CST DAM is complete, DRUC will begin at 1719. Operational Information Active
Oct 11 2021 13:26:48 CST DAM Solution Posting Postpone: ERCOT has postponed the deadline for the posting of the DAM solution for Operating Day 10/12/2021 due to re-running of DAM for AS Insufficiency. Advisory Active
Oct 11 2021 08:45:50 CST The Daily RSASM for Monday, October 11, 2021 will not be occurring due to zero participating QSEs Operational Information Active
Oct 11 2021 00:05:22 CST No sudden loss of generation greater than 450 MW occurred on October 10, 2021. Operational Information Active
Oct 10 2021 08:46:52 CST The Daily RSASM for Sunday, October 10, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 10 2021 00:06:51 CST No sudden loss of generation greater than 450 MW occurred on October 09, 2021. Operational Information Active
Oct 09 2021 12:51:30 CST At [13:00], ERCOT has updated the AAN for a possible future Emergency Condition of reserve capacity deficiency beginning October 11, 2021 HE 15 until October 11, 2021 HE 21 based on changed conditions. QSEs have updated their Resource COPs and their Outage Scheduler. At this time, ERCOT does not seek additional capacity and will not be issuing any Outage Scheduler Adjustment (OSA) at this time. ERCOT has posted an updated AAN Planning Assessment for reference. OCN Active
Oct 09 2021 12:49:40 CST ERCOT has cancelled the following notice: At [13:00], ERCOT is updating an AAN due to conditions changing and a possible future Emergency Condition of [reserve capacity deficiency] beginning [October 11, 2021 HE 15] until [October 11, 2021 HE 21]. [ERCOT may Delay/Withdrawn Approved or Accepted Resource Outages]. ERCOT may seek [94 MW] from an Outage Adjustment Evaluation (OAE) and then make the Outage Scheduler Adjustment (OSA). On [October 8, 2021] at [13:00] ERCOT will execute an Outage Adjustment Evaluation (OAE) if deemed necessary. OCN Cancelled
Oct 09 2021 08:48:52 CST The Daily RSASM for Saturday, October 9, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 09 2021 00:01:52 CST No sudden loss of generation greater than 450 MW occurred on October 08, 2021. Operational Information Active
Oct 08 2021 15:39:52 CST ERCOT has cancelled the following notice: The DC_R (Railroad) DC Tie is being de-rated due to issues on the tie till 10/02/2021 @ 23:59. Operational Information Cancelled
Oct 08 2021 15:39:35 CST ERCOT has cancelled the following notice: The DC_R (Railroad) DC Tie is limited to 150 MW until 10/04/2021 @ 23:59. Operational Information Cancelled
Oct 08 2021 15:39:12 CST ERCOT has cancelled the following notice: ERCOT has been notified that the Railroad DC Tie derate to 150 MW Import/Export due to Station 1 reactive power control issue, which was originally posted at 23:27 CDT on 09/28/21, remains in effect through 23:59 CDT on Friday, 10/08/21. Operational Information Cancelled
Oct 08 2021 13:04:21 CST At [13:00], ERCOT is updating an AAN due to conditions changing and a possible future Emergency Condition of [reserve capacity deficiency] beginning [October 11, 2021 HE 15] until [October 11, 2021 HE 21]. [ERCOT may Delay/Withdrawn Approved or Accepted Resource Outages]. ERCOT may seek [94 MW] from an Outage Adjustment Evaluation (OAE) and then make the Outage Scheduler Adjustment (OSA). On [October 8, 2021] at [13:00] ERCOT will execute an Outage Adjustment Evaluation (OAE) if deemed necessary. OCN Active
Oct 08 2021 13:02:05 CST ERCOT has cancelled the following notice: At 13:00, ERCOT issued an AAN due to a possible future Emergency Condition of reserve capacity deficiency beginning October 11, 2021 HE 15 until October 11, 2021 HE 21. ERCOT may Delay/Withdraw Approved or Accepted Resource Outages. ERCOT may seek 2, 600 MW from an Outage Adjustment Evaluation (OAE) and then make the Outage Scheduler Adjustment (OSA). On October 8, 2021 at 13:00 ERCOT will execute an Outage Adjustment Evaluation (OAE) if deemed necessary. Please notify the ERCOT Client Services if a specific resource cannot be considered in the Outage Adjustment Evaluation (OAE). OCN Cancelled
Oct 08 2021 10:53:03 CST ERCOT has been notified that the Railroad DC Tie derate to 150 MW Import/Export due to Station 1 reactive power control issue, which was originally posted at 23:27 CDT on 09/28/21, remains in effect through 16:00 CDT on Friday, 10/22/21. Advisory Active
Oct 08 2021 08:49:09 CST The Daily RSASM for Friday, October 8, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 08 2021 00:23:45 CST No sudden loss of generation greater than 450 MW occurred on October 07 2021 Operational Information Active
Oct 07 2021 16:38:49 CST DC Tie Outage: The DC_E (East) DC Tie will be unavailable from 10/12/2021 06:00 through 10/15/2021 18:00 due to a planned outage. Operational Information Active
Oct 07 2021 13:40:42 CST DC Tie Outage: The DC_E (East) DC Tie will be unavailable from 10/12/2021 06:00 through 10/15/2021 18:00 due to a planned outage. Operational Information Active
Oct 07 2021 13:39:14 CST DC Tie Outage: ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 10/11/2021 06:00 through 10/15/2021 18:00 due to a planned outage. Operational Information Cancelled
Oct 07 2021 12:59:05 CST At 13:00, ERCOT issued an AAN due to a possible future Emergency Condition of reserve capacity deficiency beginning October 11, 2021 HE 15 until October 11, 2021 HE 21. ERCOT may Delay/Withdraw Approved or Accepted Resource Outages. ERCOT may seek 2, 600 MW from an Outage Adjustment Evaluation (OAE) and then make the Outage Scheduler Adjustment (OSA). On October 8, 2021 at 13:00 ERCOT will execute an Outage Adjustment Evaluation (OAE) if deemed necessary. Please notify the ERCOT Client Services if a specific resource cannot be considered in the Outage Adjustment Evaluation (OAE). OCN Active
Oct 07 2021 10:02:23 CST DC Tie Outage: The DC_E (East) DC Tie will be unavailable from 10/11/2021 06:00 through 10/15/2021 18:00 due to a planned outage. Operational Information Active
Oct 07 2021 10:01:32 CST DC Tie Outage: ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 10/11/2021 06:00 through 10/29/2021 15:00 due to a planned outage. Operational Information Cancelled
Oct 07 2021 09:59:42 CST DC Tie Outage: ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 10/04/2021 07:30 through 10/29/2021 15:00 due to a planned outage. Operational Information Cancelled
Oct 07 2021 09:59:17 CST DC Tie Outage: The DC_E (East) DC Tie will be unavailable from 10/11/2021 06:00 through 10/29/2021 15:00 due to a planned outage. Operational Information Active
Oct 07 2021 08:49:10 CST The Daily RSASM for Thursday, October7, 2021 did not occur due to zero participating QSEs. Operational Information Active
Oct 07 2021 00:06:05 CST No sudden loss of generation greater than 450 MW occurred on October 06 2021 Operational Information Active
Oct 06 2021 08:51:51 CST The Daily RSASM for Wednesday, October 6, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 06 2021 00:27:09 CST No sudden loss of generation greater than 450 MW occurred on October 05 2021. Operational Information Active
Oct 05 2021 17:27:03 CST ERCOT has cancelled the following notice: The ESKOTA RAS has been taken out of service/removed from RTCA. Operational Information Cancelled
Oct 05 2021 15:13:13 CST ERCOT has cancelled the following notice: ERCOT is taking manual actions for an unsolved contingency. Operational Information Cancelled
Oct 05 2021 14:22:10 CST ERCOT is taking manual actions for an unsolved contingency. Operational Information Active
Oct 05 2021 08:52:32 CST The Daily RSASM for Tuesday, October 5, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 05 2021 07:47:22 CST The ESKOTA RAS has been taken out of service/removed from RTCA. Operational Information Active
Oct 05 2021 04:48:50 CST ERCOT has been notified that the Railroad DC Tie derate to 150 MW Import/Export due to Station 1 reactive power control issue, which was originally posted at 23:27 CDT on 09/28/21, remains in effect through 23:59 CDT on Friday, 10/08/21. Operational Information Active
Oct 05 2021 00:46:07 CST No sudden loss of generation greater than 450 MW occurred on October 04, 2021. Operational Information Active
Oct 05 2021 00:09:11 CST Corrected Reminder: The OATI E-tagging system will be down for planned maintenance between 02:00 to 03:00 CPT; no new schedules or schedule changes will be accepted across the DC Ties during that time period. Operational Information Active
Oct 05 2021 00:08:28 CST ERCOT has cancelled the following notice: ERCOT has cancelled the following notice: Reminder: The OATI E-tagging system will be down for planned maintenance between 02:00 to 03:00 CPT; no new schedules or schedule changes will be accepted across the DC Ties during that time period. Operational Information Cancelled
Oct 05 2021 00:08:12 CST ERCOT has cancelled the following notice: Reminder: The OATI E-tagging system will be down for planned maintenance between 02:00 to 03:00 CPT; no new schedules or schedule changes will be accepted across the DC Ties during that time period. Operational Information Active
Oct 05 2021 00:07:23 CST ERCOT has cancelled the following notice: Reminder: The OATI E-tagging system will be down for planned maintenance between 02:00 to 03:00 CPT; no new schedules or schedule changes will be accepted across the DC Ties during that time period. Advisory Cancelled
Oct 05 2021 00:06:55 CST Reminder: The OATI E-tagging system will be down for planned maintenance between 02:00 to 03:00 CPT; no new schedules or schedule changes will be accepted across the DC Ties during that time period. Advisory Active
Oct 04 2021 08:49:54 CST The Daily RSASM for Monday, October 4, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 04 2021 00:20:48 CST No sudden loss of generation greater than 450 MW occurred on October 03, 2021. Operational Information Active
Oct 03 2021 08:47:18 CST The Daily RSASM for Sunday, October 3, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 03 2021 00:07:43 CST On 10/02/2021 , a sudden loss of generation occurred at 05:51 totaling 654 MW. Frequency declined to 59.848 Hz, ERCOT load was 37, 196 MW. Operational Information Active
Oct 02 2021 22:38:21 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 20:50 for operating day 10/02/21 for HE 23-24 for 41 MW NSPIN. Operational Information Cancelled
Oct 02 2021 20:19:53 CST ERCOT will execute a SASM at 20:50 for operating day 10/02/21 for HE 23-24 for 41 MW NSPIN. Operational Information Active
Oct 02 2021 17:14:23 CST The DC_R (Railroad) DC Tie is limited to 150 MW until 10/04/2021 @ 23:59. Operational Information Active
Oct 02 2021 08:46:34 CST The Daily RSASM for Saturday, October 2, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 02 2021 05:56:03 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Oct 02 2021 05:51:15 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Oct 02 2021 01:48:37 CST ERCOT has cancelled the following notice: Advisory cancelled for DAM timeline deviation. DAM complete at 13:53. DRUC will begin at 15:00. Advisory Cancelled
Oct 02 2021 01:48:09 CST The DC_R (Railroad) DC Tie is being de-rated due to issues on the tie till 10/02/2021 @ 23:59. Operational Information Active
Oct 02 2021 00:15:59 CST On 10/01/2021, a sudden loss of generation occurred at 11:10 totaling 865 MW. Frequency declined to 59.864 Hz, ERCOT load was 46, 351 MW. Operational Information Active
Oct 01 2021 14:11:08 CST DC Tie Outage: The DC_E (East) DC Tie will be unavailable from 10/04/2021 07:30 through 10/29/2021 15:00 due to a planned outage. Operational Information Active
Oct 01 2021 11:15:55 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Oct 01 2021 11:11:03 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Oct 01 2021 08:47:35 CST The Daily RSASM for Friday, October 1, 2021 will not be occurring due to zero participating QSEs. Operational Information Active
Oct 01 2021 00:17:20 CST No sudden loss of generation greater than 450 MW occurred on September 30, 2021. Operational Information Active