A reader asked a very interesting question about ISO NE and dual-fuel units. In the process of that discussion, the reader found an answer to his own question.
New Yorkers and New Englanders are cranking up their thermostats to stay warm amid an extreme cold snap, but New England's grid overseer and its generators are finding that dual fuel generators are burning through not only needed wintertime oil supplies but also emissions allowances for the rest of the year.
ISO New England spokesperson Marcia Blomberg said the regional power system is operating under normal conditions but the extreme cold weather is increasing demand for natural gas for heating, creating pipeline constraints, driving up natural gas prices and causing dual-fuel generators to switch fuels. As a consequence, oil- and coal-fired power plants are generating much more power than usual and wholesale power prices have soared.
As of 10:30 a.m. on January 2, 2018, 34% of New England's electricity was being supplied by oil-fired generation (which over a given year supplies less than 1% of the region's generation), followed by natural gas at 25%, nuclear at 23%, renewables at 9%, coal at 6% and hydro at 4%.
Of the renewable generation, 62% of it was supplied by greenhouse gas-emitting wood-, refuse- and landfill gas-fired generation, with wind supplying 38% and solar less than 1%.
According to data from SNL Energy, ISO-NE's internal hub clocked a day-ahead power price of $210/MWh at peak on Jan. 2, up from a December 22, 2017, peak of just $66.25/MWh.
Much, much more at the link.