5/23/2018 No PMU Report 0.071 59.932 0:05:11 393 34,363 13% 216,030 18:42 Created (Note: All data on this graph encompasses frequency event analysis based on BAL-001-TRE-1.) Responsive Reserve Events There were two events where Responsive Reserve MWs were released to SCED in May. The events highlighted in blue were related to frequency events reported in Section 2.1 above. Date and Time Date and Time Duration of Maximum Released to SCED Recalled Event MWs Released 5/5/2018 16:19 5/5/2018 16:23 534 0:04:00 5/21/2018 8:06 5/21/2018 8:10 254 0:03:28 Load Resource Events None. Reliability Unit Commitment ERCOT reports on Reliability Unit Commitments (RUC) on a monthly basis. Commitments are reported grouped by operating day and weather zone. The total number of hours committed is the sum of the hours for all the units in the specified region. Additional information on RUC commitments can be found on the MIS secure site at Grid Generation Reliability Unit Commitment. There were no DRUC commitments in May. There were twenty-one HRUC commitment in May. Total # of Resource # of Operating Reason for Hours Total MWhs Location Resources Day Commitment Committed Far West 1 5/2/2018 2 132 Voltage Support Far West 1 5/3/2018 1 67 Voltage Support Far West 2 5/5/2018 23 1,579 Congestion Southern 2 5/5/2018 6 1,339 Congestion Southern 1 5/6/2018 4 1,258 Congestion Far West 2 5/6/2018 34 2,323 Congestion Far West 2 5/7/2018 26 1,729 Congestion Far West 2 5/8/2018 28 1,838 Congestion North 1 5/8/2018 8 976 Congestion Central Far West 2 5/9/2018 32 2,095 Congestion Far West 2 5/10/2018 34 2,248 Congestion Far West 2 5/11/2018 36 2,418 Congestion Far West 3 5/12/2018 37 2,457 Congestion
5/23/2018 18:42 0.071 59.932 0:05:11 No PMU Report Created 393 34,363 13% 216,030 (Note: All data on this graph encompasses frequency event analysis based on BAL-001-TRE-1.) Responsive Reserve Events There were two events where Responsive Reserve MWs were released to SCED in May. The events highlighted in blue were related to frequency events reported in Section 2.1 above. Date and Time Released to SCED Date and Time Recalled Duration of Event Maximum MWs Released 5/5/2018 16:19 5/5/2018 16:23 0:04:00 534 5/21/2018 8:06 5/21/2018 8:10 0:03:28 254 Load Resource Events None. Reliability Unit Commitment ERCOT reports on Reliability Unit Commitments (RUC) on a monthly basis. Commitments are reported grouped by operating day and weather zone. The total number of hours committed is the sum of the hours for all the units in the specified region. Additional information on RUC commitments can be found on the MIS secure site at Grid Generation Reliability Unit Commitment. There were no DRUC commitments in May. There were twenty-one HRUC commitment in May. Resource Location # of Resources Operating Day Total # of Hours Committed Total MWhs Reason for Commitment Far West 1 5/2/2018 2 132 Voltage Support Far West 1 5/3/2018 1 67 Voltage Support Far West 2 5/5/2018 23 1,579 Congestion Southern 2 5/5/2018 6 1,339 Congestion Southern 1 5/6/2018 4 1,258 Congestion Far West 2 5/6/2018 34 2,323 Congestion Far West 2 5/7/2018 26 1,729 Congestion Far West 2 5/8/2018 28 1,838 Congestion North Central 1 5/8/2018 8 976 Congestion Far West 2 5/9/2018 32 2,095 Congestion Far West 2 5/10/2018 34 2,248 Congestion Far West 2 5/11/2018 36 2,418 Congestion Far West 3 5/12/2018 37 2,457 Congestion