CAISO is preparing for spring oversupply, when unusually high levels of hydro output are expected to compound the impact of growing solar penetration.

CAISO last year paid out $47 million more to congestion revenue rights (CRR) holders than it took in from its auctions, the ISO’s IMM has found.

CAISO wants to use reliability-must-run agreements to keep two Calpine plants in Northern California operating after their long-term contracts expire.

Stakeholders and EIM Governing Body members gathered in Las Vegas to express their support for the CAISO-created Regional Issues Forum.

The unpredictability of cloud cover, which can cause sharp and sudden drops in solar production, creates a challenge for load forecasting in the EIM.

The balancing area for the Sacramento Municipal Utilities District signed an agreement allowing SMUD to join the Western EIM in 2019.

Stakeholders expressed concerns over how the Western Interconnection’s four transmission planning organizations can align their separate regional processes.

CAISO market participants continue to seek more details about an “expedited” ISO proposal to procure black start resources.

Butte County urged FERC to order the California Department of Water Resources to establish its own public safety program to help manage the Oroville Dam.

CAISO may curtail a massive amount of renewable energy this spring when increased solar output is expected to coincide with increased hydropower.