EIM Resource Sufficiency Enhancements 1% Threshold Implementation 2/15/19; Active in MAP Stage
The California ISO posted emergency PRR 1127 on Jan. 23, 2019 for its Energy Imbalance Market (EIM) Resource Sufficiency Enhancements for review. The Business Practice Manual addresses the 1% tolerance band threshold to Flexible Ramping Sufficiency Test which is scheduled for Production implementation on Feb. 15, 2019. There are no technical specifications changes associated with the 1% Threshold implementation. The 1% Threshold is currently active in Market and Performance (MAP) Stage.
The ISO plans to implement the EIM Resource Sufficiency Enhancements 1% Threshold in Production on Feb. 15, 2019. The EIM Resource Sufficiency Enhancements will apply a tolerance band threshold to Flexible Ramping Sufficiency Test of 1% or 1 MW thresholds, whichever is greater for each balancing authority area (BAA). Allowing a tolerance threshold of 1% will prevent substantial impact on transfers from sufficiency test failure due to missing the uncertainty requirement by an inconsequential amount.
The 1% Threshold is currently active in Market and Performance (MAP) Stage. ISO customers can utilize the existing California ISO Market Results Interface (CMRI) Flexible Ramp Requirement Sufficiency Test Results in MAP Stage to view the insufficiency percentage or amount to confirm that tests pass/fail according to the logic in the BRS and BPM.
For policy questions, please contact Megan Poage at firstname.lastname@example.org. Non-policy requests may be directed to your Client Representative or ISO Customer Service at 916-608-7320