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Flexible ramping product

In August 2011, the California ISO Board of Governors approved the flexible ramping constraint interim compensation methodology.  At that time the ISO committed to begin a stakeholder initiative to evaluate the creation of a flexible ramping product that will allow the ISO to procure sufficient ramping capability via economic bids.  Through this initiative, the ISO will evaluate allocating costs to generation and load in accordance with cost causation principles.




FERC approved the flexible ramping product tariff amendment on September 26. This product will replace the interim flexible ramping constraint effective November 1, 2016 pending FERC’s approval of the ISO’s petition to modify the effective date and a separate amendment to remove flexible ramping constraint language. See Draft Tariff Language - Certain Flexible Ramping Constraint References for more information.


Initiative status


Implementation: In progress - targeted for November 1, 2016
Petition for limited tariff waiver to modify effective date: September 28, 2016
FERC approval: September 26, 2016
Tariff amendment filing: June 24, 2016
Board of Governors approval: February 3, 2016

FERC filings and orders


Tariff development

Policy development

Working group