Connecticut HEDD Analysis
Synapse was contracted by the U.S. EPA to evaluate the air quality impacts from generators that operate during high electric demand days (HEDD) in Connecticut. Based on an evaluation of future electric demand, Synapse evaluated effects of increased energy efficiency and installing additional air pollution controls on the ability of Connecticut to attain compliance with EPA ozone standards. Synapse constructed a stochastic model using emissions reference data from EPA’s emissions tracking system. The model enabled electricity demand to be grown to 2020, using ISO-NE load forecasts and Synapse’s knowledge regarding future Connecticut energy and environmental policies. Model results predicted which generating unit would satisfy demand for each hour, and at what load condition, based on electricity demand.