The first quarter 2020 Market Issues and Performance Report includes coverage of market performance in both the day-ahead and real-time Western Energy Imbalance Market. Market prices remained highly competitive in the first quarter due to a combination of favorable market and system conditions. Electricity prices decreased from the previous quarter to the first quarter of 2020, with average day-ahead prices ($29/MWh) greater than both 15-minute ($27/MWh) and 5-minute prices ($26/MWh). Ancillary services costs increased during the first quarter to about $30 million, compared to about $23 million in the previous quarter, driven by an increase in regulation down payments. The report also includes special issue coverage of renewable curtailment and an introduction to
several new measures of market competitiveness.