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CPUC will split CAISO zone into PG&E, SCE and SDG&E zones for Resolve; baseline resources and local constraints updated
Summary
CPUC staff will disaggregate the CAISO model zone into three IOU-specific zones (PG&E, SCE, SDG&E) in Resolve, representing baseline resources, thermal-retention constraints, load profiles and candidate resource regions per IOU; staff said the change will improve treatment of interzonal transmission and locational decisions.
CPUC staff and consultants said the Resolve capacity-expansion model will disaggregate the CAISO balancing area into three IOU zones — Pacific Gas & Electric (PG&E), Southern California Edison (SCE) and San Diego Gas & Electric (SDG&E) — to better reflect zonal transmission constraints and IOU-specific resource characteristics.
Angana (E3 consultant) described the change as a way to “better align with the CAISO topology” and to allow Resolve to capture interzonal transmission constraints and IOU-specific thermal-retention decisions. The split will also localize baseline resources, annual…
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