The California ISO has revised the operating procedure referenced below.
Feedback regarding 4420 update can be submitting to Procedure Control Desk and it will be discussed at the Market Performance and Planning Forum on 6/29/23.
4420 System Emergency, version 15.0, effective June 22, 2023.
Annual Review:
Responsibilities section: Added CAISO Market Operator responsibilities.
Section 2.2: Minor edits for clarification.
Section 3.2: New detail added for Forecasted Events.
Section 3.3: Redefined "Note" details for Flex Alert trigger conditions.
Sections 3.4, 3.5 and 3.6.1: Included new step or utilizing Battery Exceptional Dispatch (ED) Tool.
Updated with Strategic Reliability Reserve (SRR) references to replace State Power Augmentation Project (SPAP) through sections for Responsibilities, Transmission Emergency, EEA Watch, EEA 1, EEA 2, EEA 3, Emergency Downgrade and Definitions.
3.6.1: Minor clarifications in Steps 1 and 7.
3.6.2: Minor clarification to Step 1 and added Steps 6 & 7 for CAISO and minor clarification for Step 1 for Utilities and SCs.
Section 3.6.3: Added new Step 2 and minor edit to Step 3.
Section 3.6.4: Minor edit with lead in statement, updated Steps 1 & 5 and added new Step 6 and new Step 19 for CAISO and minor edits to Steps 2 & 3 for Utilities and Scheduling Coordinators.
References section: Added SRR Generation Resources table and updated all references of EOP-011-1 to EOP-011-2.
Definitions section: Added Emergency Load Reduction Program (ELRP) Board and Strategic Reliability Reserve Program (SRRP).
Removed history prior to five years and corrected SPAP acronym noted for version 13.2.
Updated title of 4420E (Removed “Transmission”) in Appendix section.
Minor formatting and grammar edits.
4420C System Emergency Notice Templates, version 10.1, effective June 22, 2023.
Annual Review: Minor edit to Section 1.2.8. Updates to multiple message templates for 2023 summer (Sections 1.2.8, 1.2.9, 1.2.10, 1.2.11, 1.3.8, 1.3.9, 1.3.10, 1.3.11, and 1.3.12). Updated fact sheet URL reference throughout.
4420E Allowable Maintenance Activities During Restricted Maintenance Operations, version 13.1, effective June 22, 2023.
Annual Review: No changes.
The California ISO’s operating procedures are available on the Operating Procedures webpage.
