During the 12-day span from December 28, 2017, to January 8, 2018, oil and coal made up, on average, 29% and 6%, respectively, of ISO-NE's generation mix. Natural gas dropped at one point to a low of 17%. One of the region's three nuclear plants, Pilgrim, experienced an unexpected outage for six days during that period.

ISO-NE has also made market design changes to improve winter reliability, including allowing generators to submit and update supply offers for each hour of the day as opposed to a single supply offer for an entire day. Dual-fuel generators can now specify the percentage of fuels they plan to use and the costs for each fuel. These changes allow generators to offer their resources into the market with more accurate representations of their operating costs.

U.S. Department of Energy published this content on 23 January 2018 and is solely responsible for the information contained herein.
Distributed by Public, unedited and unaltered, on 23 January 2018 20:39:01 UTC.

Original documenthttps://www.energy.gov/articles/january-s-cold-weather-affects-electricity-generation-mix-northeast-mid-atlantic

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