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CPUC proposes rising fixed O&M for retained gas, repowering option and seeks input on geothermal derates and interday storage sharing
Summary
Staff proposed that fixed O&M for retained baseline gas plants increase over time, introduced a repowering candidate (repowering age ~40 years) and cost assumptions, and requested stakeholder data on geothermal ambient-temperature derates and interday sharing parameters for long-duration storage.
Staff closed the INA workshop by describing several modeling inputs still under development and seeking stakeholder data and comments.
Gas fleet retention and repowering: Sam and colleagues said Resolve will continue to economically optimize retention of baseline gas units but propose two changes: (1) baseline gas fixed O&M costs will be modeled to rise over time (staff proposed a placeholder of ~1% per year starting at an assumed age) rather than remain static; and (2) a repowering candidate resource will be created to allow Resolve to replace an existing baseline gas unit on a 1:1 basis with a repowered unit at…
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