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Electric Power Monthly

Data for September 2024 Release Date: November 22, 2024 Next Release Date: December 23, 2024 Full report PDF
SAS Output
Table B.1 Major Disturbances and Unusual Occurrences, Year-to-Date 2024

Year Month Event Date and Time Restoration Date and Time Duration Utility/Power Pool NERC Region Area Affected Type of Disturbance Loss (megawatts) Number of Customers Affected
2024 1 01/01/2024 1:55 PM 01/01/2024 2:05 PM 0 Hours, 10 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more. Firm load shedding of 100 Megawatts or more implemented under emergency operational policy-- Generator loss or failure 40 89245
2024 1 01/02/2024 3:05 PM 01/02/2024 3:13 PM 0 Hours, 8 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more-- Generator loss or failure 50 64131
2024 1 01/04/2024 5:21 PM 01/04/2024 5:35 PM 0 Hours, 14 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more-- Generator loss or failure 0 0
2024 1 01/05/2024 12:29 AM 01/05/2024 1:06 AM 0 Hours, 37 Minutes LUMA Energy N/A Puerto Rico: Uncontrolled loss of 300 Megawatts or more of firm system loads for 15 minutes or more from a single incident. Firm load shedding of 100 Megawatts or more implemented under emergency operational policy.-- Generator loss or failure 300 161194
2024 1 01/05/2024 4:03 PM 01/05/2024 4:14 PM 0 Hours, 11 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more. Firm load shedding of 100 Megawatts or more implemented under emergency operational policy-- Generator loss or failure 130 52423
2024 1 01/05/2024 6:35 PM 01/05/2024 7:04 PM 0 Hours, 29 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more. Firm load shedding of 100 Megawatts or more implemented under emergency operational policy-- Generator loss or failure 95 79445
2024 1 01/08/2024 6:05 AM 01/08/2024 6:15 AM 0 Hours, 10 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more. Firm load shedding of 100 Megawatts or more implemented under emergency operational policy-- Generator loss or failure 170 89245
2024 1 01/08/2024 9:00 AM 01/08/2024 9:01 AM 0 Hours, 1 Minutes Georgia Transmission Corporation SERC Georgia: Fulton County; Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.-- Suspicious activity 0 0
2024 1 01/09/2024 12:45 AM 01/10/2024 4:41 PM 39 Hours, 56 Minutes Puget Sound Energy WECC Washington: King County, Thurston County, Pierce County, Kittitas County, Kitsap County, Island County, Skagit County, Whatcom County; Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 75180
2024 1 01/09/2024 4:00 AM 01/10/2024 1:19 PM 33 Hours, 19 Minutes Southern Company SERC Alabama: Georgia: Mississippi: Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster 15 2131
2024 1 01/09/2024 1:34 PM . . . Hours, . Minutes Duke Energy Carolinas SERC North Carolina: South Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 108718
2024 1 01/09/2024 1:34 PM 01/09/2024 8:56 PM 7 Hours, 22 Minutes Duke Energy Carolinas SERC North Carolina: South Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 109212
2024 1 01/09/2024 4:00 PM 01/09/2024 5:00 PM 1 Hours, 0 Minutes Exelon Corporation/PECO RF Pennsylvania: Chester County, Delaware County; Cyber event that could potentially impact electric power system adequacy or reliability-- Weather or natural disaster Unknown 130000
2024 1 01/09/2024 5:35 PM 01/09/2024 11:25 PM 5 Hours, 50 Minutes Duke Energy Progress SERC North Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster 7209 151386
2024 1 01/09/2024 7:03 PM 01/14/2024 11:26 AM 112 Hours, 23 Minutes Detroit Edison Co RF Michigan: Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 172481
2024 1 01/09/2024 9:40 PM 01/11/2024 8:00 PM 46 Hours, 20 Minutes National Grid NPCC New York: Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 96000
2024 1 01/10/2024 7:05 AM 01/11/2024 7:30 AM 24 Hours, 25 Minutes ISO New England NPCC Connecticut: Massachusetts: Maine: Rhode Island: Vermont: New Hampshire: Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 91000
2024 1 01/11/2024 1:01 AM 01/11/2024 1:10 AM 0 Hours, 9 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more. Firm load shedding of 100 Megawatts or more implemented under emergency operational policy-- Generator loss or failure 250 142296
2024 1 01/11/2024 6:40 PM 01/11/2024 8:24 PM 1 Hours, 44 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more-- Other 0 0
2024 1 01/12/2024 7:00 AM . . . Hours, . Minutes ComEd SERC Illinois: Cook County, Winnebago County, Will County, DeKalb County, DuPage County, Kane County, Boone County, McHenry County, Lake County; Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 186778
2024 1 01/12/2024 7:03 PM 01/14/2024 11:26 AM 40 Hours, 23 Minutes Detroit Edison Co RF Michigan: Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 172481
2024 1 01/12/2024 8:38 PM . . . Hours, . Minutes WEC Energy Group (WEPCO, WPSC, UMERC, WEP-MIUP) MRO Wisconsin: Milwaukee County, Waukesha County, Washington County, Ozaukee County, Racine County, Kenosha County, Dodge County, Jefferson County; Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster 200 250000
2024 1 01/13/2024 12:43 AM 01/14/2024 5:00 PM 40 Hours, 17 Minutes Consumers Energy Co RF Michigan: Leelanau County, Oscoda County, Ogemaw County, Alcona County, Iosco County, Arenac County, Gladwin County, Midland County, Clare County, Mecosta County, Montcalm County, Saginaw County, Shiawassee County, Clinton County, Genesee County, Ingham County, Jackson County, Hillsdale County, Lenawee County, Eaton County, Barry County, Branch County, Calhoun County, St. Joseph County, Kalamazoo Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 175488
2024 1 01/13/2024 10:50 AM 01/15/2024 6:00 PM 55 Hours, 10 Minutes Portland General Electric Co WECC Oregon: Multnomah County, Clackamas County, Washington County, Yamhill County, Hood River County; Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster 4031 165000
2024 1 01/14/2024 3:00 PM . . . Hours, . Minutes PPL Electric Utilities Corp RF Pennsylvania: Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 50000
2024 1 01/18/2024 2:30 PM 01/18/2024 2:35 PM 0 Hours, 5 Minutes American Electric Power (Regulated Generation) RF Indiana: Spencer County; Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.-- Suspicious activity 0 0
2024 1 01/18/2024 6:06 PM 01/19/2024 9:45 PM 27 Hours, 39 Minutes Portland General Electric Co WECC Oregon: Clackamas County, Multnomah County, Polk County, Washington County, Yamhill County; Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster 3744 116998
2024 1 01/19/2024 7:01 AM 01/19/2024 7:16 AM 0 Hours, 15 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more-- Fuel supply emergency - Generator loss or failure 0 0
2024 1 01/22/2024 4:57 AM 01/22/2024 7:54 AM 2 Hours, 57 Minutes LCRA TSC RE Texas: Bastrop County; Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.-- Suspicious activity 0 0
2024 1 01/23/2024 6:22 PM 01/23/2024 7:15 PM 0 Hours, 53 Minutes Constellation Energy Generation, LLC RF Maryland: Calvert County; Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.-- Suspicious activity 0 0
2024 1 01/25/2024 2:14 PM 01/25/2024 2:42 PM 0 Hours, 28 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more. Firm load shedding of 100 Megawatts or more implemented under emergency operational policy-- Generator loss or failure - Transmission equipment failure 154 156859
2024 1 01/26/2024 4:00 AM 01/26/2024 4:30 AM 0 Hours, 30 Minutes Apex Generating Station WECC Nevada: Clark County;  Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.-- Vandalism - Theft 0 0
2024 1 01/29/2024 8:27 AM 01/29/2024 8:37 AM 0 Hours, 10 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more. Firm load shedding of 100 Megawatts or more implemented under emergency operational policy-- Generator loss or failure 20 58680
2024 1 01/31/2024 3:57 AM 01/31/2024 4:02 AM 0 Hours, 5 Minutes LUMA Energy N/A Puerto Rico: System-wide voltage reductions of 3 percent or more-Alert 24 Unknown
2024 2 02/02/2024 6:13 AM 02/02/2024 6:34 AM 0 Hours, 21 Minutes LUMA Energy N/A Puerto Rico System-wide voltage reductions of 3 percent or more-- Other 0 0
2024 2 02/02/2024 12:38 PM 02/02/2024 1:25 PM 0 Hours, 47 Minutes ISO New England NPCC Connecticut, Massachusetts, Maine, Rhode Island, Vermont, New Hampshire Complete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.-- Unknown 0 0
2024 2 02/02/2024 1:25 PM 02/02/2024 1:26 PM 0 Hours, 1 Minutes Constellation Energy Generation, LLC SERC Illinois Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility-- Suspicious activity 0 0
2024 2 02/04/2024 7:37 AM 02/04/2024 9:20 AM 1 Hours, 43 Minutes LUMA Energy N/A Puerto Rico System-wide voltage reductions of 3 percent or more-- Generator loss or failure 90 115374
2024 2 02/04/2024 2:00 PM 02/04/2024 3:59 PM 1 Hours, 59 Minutes Sacramento Municipal Utility District WECC California Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster - Other Unknown 167000
2024 2 02/04/2024 2:00 PM 02/05/2024 3:00 AM 13 Hours, 0 Minutes Sacramento Municipal Utility District WECC California Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster 1230 200000
2024 2 02/05/2024 6:30 PM 02/05/2024 6:31 PM 0 Hours, 1 Minutes Constellation Energy Generation, LLC SERC Illinois Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility-- Suspicious activity 0 0
2024 2 02/06/2024 7:15 PM 02/06/2024 7:16 PM 0 Hours, 1 Minutes Constellation Energy Generation, LLC SERC Illinois Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility-- Suspicious activity 0 0
2024 2 02/07/2024 11:01 AM 02/07/2024 11:06 AM 0 Hours, 5 Minutes LUMA Energy N/A Puerto Rico System-wide voltage reductions of 3 percent or more-- Generator loss or failure 10 0
2024 2 02/07/2024 10:10 PM 02/07/2024 10:34 PM 0 Hours, 24 Minutes LUMA Energy N/A Puerto Rico System-wide voltage reductions of 3 percent or more-- Generator loss or failure Unknown Unknown
2024 2 02/08/2024 12:45 PM 02/08/2024 1:45 PM 1 Hours, 0 Minutes Lafayette Public Power Auth SERC Louisiana Complete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.-- Other 200 0
2024 2 02/13/2024 8:00 AM . . . Hours, . Minutes PPL Electric Utilities Corp RF Pennsylvania Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 100000
2024 2 02/13/2024 8:56 AM 02/13/2024 12:40 PM 3 Hours, 44 Minutes PPL Electric Utilities Corp RF Pennsylvania Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 165000
2024 2 02/20/2024 8:04 PM 02/20/2024 8:55 PM 0 Hours, 51 Minutes CenterPoint Energy Houston Electric, LLC Texas RE Texas Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility-- Suspicious activity 0 0
2024 2 02/22/2024 12:10 AM 02/22/2024 1:10 AM 1 Hours, 0 Minutes Minnesota Power MRO Minnesota Complete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.-- Unknown 0 0
2024 2 02/28/2024 2:19 PM 02/28/2024 2:35 PM 0 Hours, 16 Minutes LUMA Energy Unknown Puerto Rico: System-wide voltage reductions of 3 percent or more-- Generator loss or failure - Other 75 66403
2024 2 02/28/2024 9:30 PM . . . Hours, . Minutes National Grid NPCC New York Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 76076
2024 2 02/28/2024 11:35 PM 02/29/2024 8:50 AM 9 Hours, 15 Minutes ISO New England NPCC Connecticut, Massachusetts, Maine, Rhode Island, Vermont, New Hampshire Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 50000
2024 2 02/29/2024 12:00 PM 02/29/2024 12:01 PM 0 Hours, 1 Minutes Bethlehem Energy Center NPCC New York: Albany County; Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.-- Unknown Unknown Unknown
2024 3 03/04/2024 4:17 PM 03/04/2024 4:30 PM 0 Hours, 13 Minutes LUMA Energy Unknown Puerto Rico: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy.-- Generator loss or failure 80 90104
2024 3 03/06/2024 9:30 PM 03/06/2024 9:31 PM 0 Hours, 1 Minutes Constellation Energy Generation, LLC SERC Illinois: De Witt County; Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.-- Suspicious activity 0 0
2024 3 03/08/2024 6:45 AM 03/08/2024 6:53 AM 0 Hours, 8 Minutes LUMA Energy Unknown Puerto Rico: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy.-- Generator loss or failure 115 87196
2024 3 03/08/2024 6:45 AM 03/08/2024 6:58 AM 0 Hours, 13 Minutes LUMA Energy Unknown Puerto Rico: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy.-- Generator loss or failure Unknown Unknown
2024 3 03/10/2024 10:55 AM 03/11/2024 4:00 AM 17 Hours, 5 Minutes ISO New England NPCC Connecticut: Massachusetts: Maine: Rhode Island: Vermont: New Hampshire:  Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 60755
2024 3 03/12/2024 5:28 AM 03/12/2024 5:30 AM 0 Hours, 2 Minutes Constellation Energy Generation, LLC SERC Illinois: De Witt County; Physical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.-- Suspicious activity 0 0
2024 3 03/13/2024 4:39 PM 03/13/2024 5:05 PM 0 Hours, 26 Minutes LUMA Energy Unknown Puerto Rico: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy/System-wide voltage reductions of 3 percent or more-- Generator loss or failure 100 90664
2024 3 03/13/2024 4:40 PM 03/13/2024 5:05 PM 0 Hours, 25 Minutes LUMA Energy Unknown Puerto Rico: System-wide voltage reductions of 3 percent or more-- Generator loss or failure Unknown Unknown
2024 3 03/14/2024 8:53 AM 03/14/2024 9:08 AM 0 Hours, 15 Minutes LUMA Energy Unknown Puerto Rico: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy/System-wide voltage reductions of 3 percent or more-- Generator loss or failure 228 Unknown
2024 3 03/15/2024 10:00 AM 03/15/2024 10:13 AM 0 Hours, 13 Minutes LUMA Energy Unknown Puerto Rico: System-wide voltage reductions of 3 percent or more-- Generator loss or failure 30 70361
2024 3 03/22/2024 1:12 AM 03/22/2024 4:49 PM 15 Hours, 37 Minutes CenterPoint Energy Texas RE Texas: Harris County;  Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 125077
2024 3 03/23/2024 5:22 PM . . . Hours, . Minutes National Grid NPCC New York:  Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 88134
2024 3 03/23/2024 9:40 PM 03/26/2024 4:00 AM 54 Hours, 20 Minutes ISO New England NPCC Connecticut: Massachusetts: Maine: Rhode Island: Vermont: New Hampshire:  Loss of electric service to more than 50,000 customers for 1 hour or more-- Weather or natural disaster Unknown 110000
2024 3 03/25/2024 11:21 AM 03/25/2024 6:53 PM 7 Hours, 32 Minutes CenterPoint Energy Houston Electric, LLC Texas RE Texas: Harris County; Complete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.-- Unknown 0 0
2024 3 03/26/2024 1:18 PM 03/26/2024 2:02 PM 0 Hours, 44 Minutes Central Maine Power Company NPCC Maine: Complete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.-- Other 0 0
2024 3 03/29/2024 8:41 PM 03/29/2024 9:14 PM 0 Hours, 33 Minutes LUMA Energy Unknown Puerto Rico: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy/System-wide voltage reductions of 3 percent or more-Unknown 215 Unknown
2024 3 03/30/2024 3:20 PM 03/30/2024 3:33 PM 0 Hours, 13 Minutes LUMA Energy Unknown Puerto Rico: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy/System-wide voltage reductions of 3 percent or more-- Fuel supply emergency Unknown Unknown
2024 3 03/30/2024 5:55 PM 03/30/2024 6:05 PM 0 Hours, 10 Minutes LUMA Energy Unknown Puerto Rico: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy/System-wide voltage reductions of 3 percent or more-Unknown 163 Unknown
2024 3 03/30/2024 6:30 PM 03/30/2024 11:17 PM 4 Hours, 47 Minutes LUMA Energy Unknown Puerto Rico: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy/System-wide voltage reductions of 3 percent or more-- Generator loss or failure Unknown Unknown

Note: Customers affected are estimates and are preliminary.
Source: Form OE-417, 'Electric Emergency Incident and Disturbance Report.'