The Summer 2016 Quarterly Markets Report prepared by the Internal Market Monitor (IMM) of ISO New England reviews wholesale energy market outcomes for June, July, and August of 2016.The report notes that the total wholesale cost of electricity (including energy, capacity, and ancillary services) during the three-month period was $1.56 billion, up 13% compared to the market value of $1.38 billion during the summer of 2015. The average real-time wholesale energy price was $30.35 per megawatt-hour, a rise of 13% compared to the summer of 2015. The year-over-year increase was driven by 2% higher average demand due to hotter weather, particularly in August, and natural gas prices that averaged $2.68 per million British thermal units, 31% higher than the average price during the summer of 2015.
The Summer 2016 Quarterly Markets Report reviews the events of Thursday, August 11, and Friday, August 12. On both days, a combination of forced generator outages and high consumer demand resulted in reduced reserve margins and high real-time energy prices. For just under four hours on August 11, a shortage event was implemented under the provisions of the Forward Capacity Market rules.