Testing market alternatives for renewable integration using a reduced network model

California´s increasing use of renewable energy will result in profound changes in markets and system operations as the resource portfolio shifts away from heavy reliance on natural gas-fueled generation. The California ISO is implementing new market products to provide a flexibility reserve, and continues to evaluate other market changes to respond to uncertainty in intermittent resources´ output. The residual unit commitment (RUC) process is the final step of the day-ahead market, to ensure adequate resources for realtime dispatch. This study applies a 240-bus test system for the California and WECC regional market, to examine whether the RUC process could be improved by considering uncertainty in demand and intermittent resource output, through stochastic unit commitment.