Gas use share in ERCOT drops, but maintains lead: grid driver

The gas share in the Electric Integrity Council of Texas' generation mix fell for the second straight month, yet continues to be the lead gas source despite coal making some gains, ERCOT claimed in its regular monthly record released Wednesday.

All-natural gas-fired use went down to 45.1% of the electrical energy created in ERCOT in May from 50.8% in April, however it was up from 38.5% in Might 2014. Spot Houston Ship Network gas rates averaged $2.802/ MMBtu for Might, up from $2.561/ MMBtu in April, but below $4.463/ MMBtu in May 2014.

Coal-fired power jumped momentarily straight month to 27.9% of the energy used in ERCOT in Might from 23.1% in April and also 21.9% in March, which was the lowest point until now this year. Coal facilities provided 39.5% of the fuel mix in Might 2014, more than gas plants at the time as well as the second-highest factor coal got to that year.

Nuclear plants offered 12.3% of the power consumed in May, up from 11% in April and 10.2% in Might 2014, while wind ranches generated 14.3% of the power needed in Might, down somewhat from 14.9% in April, however up from 11.8% in May 2014.


water treatment agent throughout the grid driver's footprint used 27.9 million MWh of power in May, compared to 27.3 million MWh in Might 2014-- an about 2% year-on-year rise.

ERCOT day-ahead costs are still down greatly from the year before, despite small month-on-month gains.

At ERCOT North, one of the most liquid hub, the day-ahead on-peak cost balanced $26.50/ MWh in Might, unmodified from April however down considerably from $40/MWh in May 2014. Off-peak prices averaged $18.25/ MWh in May, expanding from $17.75/ MWh in April yet reducing from $27.25/ MWh in May 2014.

National Weather Service information reveals that Austin, which exists near the center of ERCOT's footprint, had 11.45% fewer air conditioning degree-days than normal in May, yet 7.12% more than 2014.

ERCOT's power need for the month peaked at 53,389 MW May 18, 1.5% over the year-ago peak of 52,615 MW, reached May 30, 2014.