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.
CAISO Board Approves Aliso Canyon Rules Package
The CAISO Board of Governors greenlit new rules that allow the grid operator to constrain the operations of gas plants across the state and the EIM.
Q2 2017 Earnings Briefs
Calpine, PG&E and Southern California Edison released their second-quarter earnings results last week.
New CAISO Rules Spell Increased DER Role
The CAISO Board of Governors approved a set of market rules designed to aid the integration of distributed energy resources and energy storage.
UPDATED: Aliso Canyon Resumes Injections
L.A. County officials asked a state court to halt the resumption of natural gas withdrawals from Aliso Canyon until more risks are analyzed.
Public Power Takes PJM Gripes to Congress
While PJM stakeholders were meeting to consider yet more changes to the Reliability Pricing Model, public power representatives took their case to Congress.
California Officials: Aliso Canyon Safe to Open
California officials cleared the Aliso Canyon natural gas storage facility to resume injections, even as momentum builds to permanently close the site.
CAISO Solar Eclipse Prep Relies on Conventional Mix
CAISO will lean heavily on increased output from conventional generators to make up for lost solar power during next month’s solar eclipse.
California Lawmakers Extend Cap-and-Trade
Both houses of the California State Legislature voted late Monday to extend the state’s greenhouse gas (GHG) cap-and-trade program until 2030.
CAISO Monitor Says EIM Bid Limits No Longer Needed
Energy transfer capacity in the EIM footprint is now sufficient to justify removing bid limits that are in effect for some members, the CAISO Monitor says.
EIM Leaders Endorse CAISO Gas Constraint Measure
EIM leaders endorsed a CAISO proposal that would allow the ISO to constrain output from natural gas-fired plants across the market.

Want more? Advanced Search