FERC approves CAISO tariff changes for demand response, distributed storage
The changes to CAISO’s tariff are a part of the state’s efforts to bring a wider range of energy resources into its markets. As it moves forward with those plans, details are being worked out to better integrate resources that don’t act like typical generators.
CAISO’s proposal, which it filed in May, included two primary changes. It would have allowed non-generator resources to submit their state-of-charge as a bid parameter in the day-ahead market, and to self-manage their state-of-charge and energy limits. And, the changes create performance methodologies to accommodate sub-metering and would allow the grid operator to ascertain demand response performance based upon the gross load, independent of behind-the-meter generation.
FERC defines non-generator resources as those which can generate or consume energy, and/or curtail consumption, and can be dispatched to any operating level within their entire capacity range.
The commission found the changes reasonable, saying the tariff revisions would “better align the non-generator resource model with the traditional generation models and give non-generator resources more flexibility to optimize their physical capabilities in real time.”