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The first geothermal power plant built in more than three decades within the California Independent System Operator (CAISO) balancing authority has come online. Mammoth Pacific Geothermal, an Ormat Co. subsidiary, declared the 30-MW Casa Diablo IV (CD4) commercially operational on July 20. CD4 is located on public land two miles east of the Town of […]

An unprecedented array of risks—ranging from capacity shortfalls, extreme weather, extended drought, supply chain issues, cybersecurity, solar PV tripping, fuel constraints, to wildfires—could imperil the reliability of nearly every North American bulk power system (BPS) region west of the Midcontinent Independent System Operator (MISO) this summer, the North American Electric Reliability Corp. (NERC) warned in […]

San Diego Gas & Electric (SDG&E) has completed a second energy storage project in its home city, a 20-MW/80-MWh facility located in Kearny Mesa. Utility officials on March 29 said the new installation is part of California’s push toward 100% carbon-free electricity. SDG&E in June 2021 completed the Top Gun Energy Storage project, a 30-MW/120-MWh […]

California’s power grid continues to evolve and will look much different by 2040, according to a 20-year draft transmission plan released by the California Independent System Operator (CAISO). The plan calls for significant additional renewable energy resources, along with a $30.5-billion build-out of the transmission grid.  The outlook, developed by the grid operator along with […]

Flex Alert program now allows consumers to indicate potential participation FOLSOM, Calif. – The California Independent System Operator (ISO) has launched an upgraded version of its popular Flex Alert voluntary energy conservation program to add direct customer feedback and boost participation. The enhancements include an option for users to indicate their willingness to reduce electricity […]

Vistra, the Texas-based integrated retail electricity and power generation company, said it has completed the second phase of its Moss Landing Energy Storage Facility expansion project in California. The group on Aug. 19 announced it has added 100 MW/400 MWh to what at present is the world’s largest battery energy storage facility. “This facility provides […]

Large-scale battery power capacity in the U.S. surged 35% over 2020 to reach 1,650 MW, and according to the Energy Information Administration (EIA), utilities are planning to ramp up that capacity by 10 GW over the next two years. In a newly released report, Battery Storage in the United States: An Update on Market Trends, […]

Intensifying drought conditions in California and historically low water levels at the Oroville Dam on Aug. 5 forced the state’s Department of Water Resources (CDWR) to shut down the 644-MW Edward Hyatt Power Plant—the fourth largest energy producer of all California’s hydroelectric facilities. Similar conditions across the West are prompting a careful watch over hydropower facilities.

The costs for wind and solar power generating systems have decreased dramatically over the past decade. According to the International Renewable Energy Agency (IRENA), the global weighted-average levelized

The rapidly spreading Bootleg Fire tripped off transmission lines that transport power from the Pacific Northwest to California and other states over the weekend, prompting the California Independent System Operator (ISO) to issue another Flex Alert—the sixth such conservation notification this summer. According to the state’s Incident Information System, the intense fire in Southern-Central Oregon […]