Cal-ISO warns summer supply shortage risks remain in extreme heat conditions

摘要

The California Independent System Operator warned May 12 that its power grid is still susceptible to stress during extreme heatwaves, but summer supply conditions are expected to be better than to a year ago when rotating outages were needed to prevent a grid collapse. Improvements are mostly driven by new capacity added since summer 2020, while forecasted load remains nearly unchanged under normal conditions, according to Cal-ISO's 2021 Summer Loads and Resources Assessment. However, back-to-back low hydro years and increased extreme weather possibilities mean the ISO could still face challenges in meeting summer load.