In 2014, more than 10% of the electricity used in the grid covering most of Texas came from wind generation, according to the grid’s operator, the that have allowed more wind power to flow through the system to consumers.
Wind generation in ERCOT nearly doubled from 18.8 million megawatthours (MWh) in 2009 to 36.1 million MWh in 2014. Wind capacity has also grown substantially over the past six years (and . As these transmission constraints were removed, more generation from wind plants (largely concentrated in the northwestern part of the state) could reach the state’s population centers. The result has been a faster increase in wind generation than in wind capacity from 2009 to 2014.
Wind’s contribution to ERCOT generation is not evenly distributed throughout the year. In Texas, peak wind season occurs during the spring—March to June—before significantly dropping off during the summer—July to September. Based on data for the past six years, the four months from March through June account for on average about 40% of annual wind generation in ERCOT. The graph on the right below shows a fairly consistent seasonal pattern from year to year, despite the difference in actual volumes of generation.
Principal contributor: April Lee