CAISO/WEIM

The California Independent System Operator serves about 80% of California's electricity demand, including the service areas of the state's three investor-owned utilities. It also operates the Western Energy Imbalance Market, an interstate real-time market covering territory that accounts for 80% of the load in the Western Interconnection.
FERC OKs Natural Gas Index for CAISO
FERC approved the CAISO natural gas price index used in response to the closure of the Aliso Canyon storage facility.
FERC Grants TransCanyon 9.8% ROE for CAISO Projects
FERC approved a settlement allowing TransCanyon to collect a 9.8% base ROE for any projects it builds under the CAISO FERC Order 1000 competitive solicitation process.
FERC Eliminates West-Wide Must-Offer Rule
FERC last week eliminated the must-offer obligation in effect throughout WECC since the tail-end of the California energy crisis of 2000-2001.
CAISO Planners Looking Ahead to Summer 2017 Solar Eclipse
CAISO is seeking stakeholder input on how to respond to a solar eclipse that will significantly curtail output from California’s growing solar generation portfolio next August.
Sacramento Utility to Join EIM; Other BANC Members May Follow
The Sacramento Municipal Utility District will join the CAISO EIM and other members of the Balancing Authority of Northern California (BANC) may follow.
More Work Needed on Western RTO Proposal, Stakeholders Say
More changes are needed to the CAISO proposed rules for a Western RTO to win approval from the states in which PacifiCorp operates, stakeholders say.
Mexico’s Grid Operator to Explore Participation in EIM
CENACE and CAISO announced an agreement to explore the benefits of having Baja California Norte join the Energy Imbalance Market (EIM).
Report: Calif. ‘Duck Curve’ Growing Faster than Expected
A new research report indicates that "The duck curve is driven by utility-scale solar in California, not distributed resources."
FERC to Consider Western Energy Crisis ‘Umbrella Pricing’ Theory
FERC last week agreed to consider whether reporting deficiencies concealed market manipulation that contributed to the Western Energy Crisis of 2000-2001.
CAISO Seeks Process to Keep EIM, Governing Body in the Policy Loop
CAISO is seeking ways to ensure that the EIM governing body and participants, havea say in ISO policies that affect the EIM.

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