Extended Day-Ahead Market Congestion Revenue Allocation Stage 2: Analysis paper posted

The California ISO has published a paper regarding the second stage of analysis for the Extended Day-Ahead Market (EDAM) Congestion Revenue Allocation methodology. 

On Dec. 11, 2025, the ISO posted a paper on the first stage of analysis related to the congestion revenue allocation methodology for the go-live of the Extended Day-Ahead Market. This initial stage examined historical congestion in the Western Energy Imbalance Market as a reference for potential congestion patterns on balancing areas participating in the Day-1 Extended Day-Ahead Market.

The second stage of the analysis examines the potential impacts of the congestion revenue allocation methodology for Day-1 of the Extended Day-Ahead Market. It fulfills the ISO’s commitment to assess potential impacts prior to the market’s go-live. The findings were previously discussed at the March 6 Market Surveillance Committee session. 

The analysis paper is available on the Extended day-ahead market initiative webpage.

Please contact Christina Guimera cguimera@caiso.com or ISOStakeholderaffairs@caiso.com with any questions.