The Texas power grid operator said it had experienced four transmission watches this year as a result of growing demand and tight capacity in some areas.
Separately, ERCOT noted that overall peak electric demand in 2011 was higher compared to the demand in the summer of 2012.
ERCOT chairman Craven Crowell was quoted by Reuters as saying that, "It turns out that June was hotter than August this year, so that was different for us."
The company also said the South Texas Electric Cooperative seeks to increase capacity in Dimmit, La Salle and McMullen.
Some of the notable transmission and generation firm in Texas include American Electric Power, NRG Energy, Exelon, NextEra Energy, Luminant, Oncor, CenterPoint Energy, PNM Resources, and Calpine.
