committed considering operating characteristics including effectiveness of the resource to meet the reactive power need, start-up time, start-up and minimum load cost. Following identification of the voltage concern, the ISO will conduct an analysis and identify the MW amount and location of the unit commitments and any additional capacity needed to ensure that Reactive Power Support in the local area is reliable and adequate. The ISO will then issue an Exceptional Dispatch CPM for reactive power for the identified MW amount. The analysis includes simulation of expected system conditions in the time of interest using a power flow model and/or other appropriate in-house tools. All credible contingencies are studied and system performance is monitored for any potential voltage concerns. Mitigation options are developed to alleviate the identified voltage concerns. The results of these studies provide the operations engineer with enough information about the system after a contingency has occurred to determine the amount of reactive power that is needed if there is a voltage problem or the amount of real power needed if there is also a thermal overload problem. On subsequent days, if the ISO determines that additional Exceptional Dispatch CPM capacity is required for reactive power support, the ISO treats the dispatch as a subsequent Exceptional Dispatch under ISO Tariff Section 43.2.5.2.3. The ISO will notify the scheduling coordinator for the resource of the subsequent dispatch. Real-time In real-time, the ISO may an Exceptional Dispatch CPM when the ISO must take immediate action to respond to an imminent or threatened system emergency. If the ISO issues an Exceptional Dispatch to a resource for capacity that is not already Resource Adequacy capacity, substituted Resource Adequacy capacity or CPM capacity in real-time to obtain needed reactive support, this dispatch is based on commitment tools, Operating Procedure or/and engineering studies. Accordingly, the dispatch will be for the actual amount of capacity required and such amount will be the designated CPM quantity. Other Provisions The Exceptional Dispatch CPM designation for reactive support to address an Exceptional Dispatch CPM Non-System Reliability Need, as defined in the Tariff, will be for 60-days. Following an Exceptional Dispatch CPM designation for reactive power support, the ISO will publish the CPM reports consistent with the ISO Tariff. Selection of Eligible Capacity or Exceptional Dispatch CPM Designations ISO Tariff Section 34.9. In accordance with good utility practice the ISO shall make designations of Eligible Capacity for an Exceptional Dispatch CPM based on the following additional criteria:
committed considering operating characteristics including effectiveness of the resource to meet the reactive power need, start-up time, start-up and minimum load cost. Following identification of the voltage concern, the ISO will conduct an analysis and identify the MW amount and location of the unit commitments and any additional capacity needed to ensure that Reactive Power Support in the local area is reliable and adequate. The ISO will then issue an Exceptional Dispatch CPM for reactive power for the identified MW amount. The analysis includes simulation of expected system conditions in the time of interest using a power flow model and/or other appropriate in-house tools. All credible contingencies are studied and system performance is monitored for any potential voltage concerns. Mitigation options are developed to alleviate the identified voltage concerns. The results of these studies provide the operations engineer with enough information about the system after a contingency has occurred to determine the amount of reactive power that is needed if there is a voltage problem or the amount of real power needed if there is also a thermal overload problem. On subsequent days, if the ISO determines that additional Exceptional Dispatch CPM capacity is required for reactive power support, the ISO treats the dispatch as a subsequent Exceptional Dispatch under ISO Tariff Section 43.2.5.2.3. The ISO will notify the scheduling coordinator for the resource of the subsequent dispatch. Real-time In real-time, the ISO may an Exceptional Dispatch CPM when the ISO must take immediate action to respond to an imminent or threatened system emergency. If the ISO issues an Exceptional Dispatch to a resource for capacity that is not already Resource Adequacy capacity, substituted Resource Adequacy capacity or CPM capacity in real-time to obtain needed reactive support, this dispatch is based on commitment tools, Operating Procedure or/and engineering studies. Accordingly, the dispatch will be for the actual amount of capacity required and such amount will be the designated CPM quantity. Other Provisions The Exceptional Dispatch CPM designation for reactive support to address an Exceptional Dispatch CPM Non-System Reliability Need, as defined in the Tariff, will be for 60-days. Following an Exceptional Dispatch CPM designation for reactive power support, the ISO will publish the CPM reports consistent with the ISO Tariff. Selection of Eligible Capacity or Exceptional Dispatch CPM Designations ISO Tariff Section 34.9. In accordance with good utility practice the ISO shall make designations of Eligible Capacity for an Exceptional Dispatch CPM based on the following additional criteria:
BPM_for_Reliability_Requirements_V17_clean.docx