Search
June 22, 2025

SPP Western Energy Imbalance Service (WEIS)

SPP
FERC Accepts Revisions to SPP’s WEIS Market
FERC accepted SPP's tariff revisions to its Western Energy Imbalance Service market that allow market holds for reliability-based concerns when requested by a balancing authority.
Black Hills Energy
CAISO’s WEIM Plucks Black Hills Utilities from SPP’s WEIS
CAISO scored a geographically small but symbolically significant victory with the announcement that two Black Hills Energy subsidiaries will move to the ISO’s Western Energy Imbalance Market.
SPP
FERC Accepts Changes to SPP’s WEIS Market
FERC accepted SPP’s revisions to its WEIS market tariff related to the residual supply index and ensuring that affiliated market participants’ resources are evaluated together.
© RTO Insider LLC
Conditions Finally Reverted to (Somewhat) Normal for SPP in 2023
SPP chalked up numerous successes during 2023 without the effects of a global pandemic or severe winter storms.
SPP
FERC Rejects SPP WEIS Market Power Rule

FERC rejected SPP’s proposed market power test for the Western Energy Imbalance Service, saying it gave the Market Monitor too much discretion.

Jimmy, CC BY-SA-2.0, via Wikimedia
FERC Approves PSCo’s Temporary CO2 Price
FERC on Tuesday approved Public Service Company of Colorado’s request to use the social cost of carbon to help dispatch its generation for the next few months.
SPP
SPP Hands Lucas, Kelley New VP Positions
SPP has added to its senior leadership team by naming Antoine Lucas as vice president of markets and David Kelley as vice president of engineering.
© RTO Insider LLC
SPP Brings Back Ex-staffer to Develop Western Services
SPP has welcomed back ex-staffer Carrie Simpson to lead the continued development of its service offerings in the Western Interconnection.
© RTO Insider LLC
New Study: Increased Savings from SPP RTO West Expansion
Western utilities interested in SPP’s RTO West offering released a study showing the grid operator’s expansion could produce huge annual savings.
Platte River Power Authority
SPP Briefs: Week of Aug. 22, 2022
Colorado utility Platte River Power Authority is the latest Western utility to express intent to evaluate participation in SPP's RTO West.

Want more? Advanced Search