Coal-fired power plant operators in the Midcontinent Independent System Operator (MISO) cut their must-run commitments in the power grid’s day-ahead markets by 21pc this past winter to account for increased competition from low-cost natural gas generation. Generators in MISO offered 27,628MW of coal capacity, or 63pc of their overall available coal-fired generation, as mustrun in the day ahead markets during the past winter. That must-run capacity was down from 34,879MW, or 79pc of total coal-fired generation, in the previous winter, David Patton of Potomac Economics said yesterday during the power grid's quarterly meeting.
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