Midcontinent Independent System Operator May gas burn drops, coal, renewables rise
Gas accounted for 21.2pc of MISO generation fuel mix in May, down from 26.7pc a year earlier, the grid operator said in a monthly report. Total electric demand in May was down by 4pc from a year earlier to about 45.5TWh because of cooler weather.
The data implies gas-fired units in May dispatched 9TWh, down by 26pc from May 2016. Generation from coal-fired power plants in May increased by 10pc from a year earlier to 20.7TWh.
Gas-fired generation has declined from the year-earlier levels in each of the previous four months amid year-over-year increase in gas prices. The average spot gas price at the Chicago Citygates in May was $3.01/mmBtu, 56pc higher than the year earlier. Gas delivered to Mich Con Citygates averaged $3.08/mmBtu in May, rising 57pc.
Average coal prices in May across the MISO footprint rose 6pc from a year earlier, according to MISO.
"The increase in fuel prices was a major factor in the increase in energy prices" in May compared to last year, MISO said.
Day-ahead and real-time locational marginal prices in May averaged at $30.25/MWh and $29.70/MWh, respectively. In May 2016 those prices averaged $22.85/MWh and $21.81/MWh, respectively.
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