Here is some history about Texas power generation.
"The Texas Interconnect System — which for a long time was actually operated by two entities, one for northern Texas and one for southern Texas — had another priority:
staying out of the reach of federal regulators. In 1935, President Franklin D. Roosevelt signed the Federal Power Act, which charged the Federal Power Commission with overseeing interstate electricity sales. By not crossing state lines, Texas utilities avoided being subjected to federal rules."
"Even today, ERCOT is also not completely isolated from other grids — as was evident when the state imported some power from Mexico during the rolling blackouts of
2011. ERCOT has three ties to Mexico and — as an outcome of the "Midnight Connection" battle — it also has two ties to the eastern U.S. grid, though they do not trigger federal regulation for ERCOT. All can move power commercially as well as be used in emergencies, according to ERCOT spokeswoman Dottie Roark."
Not enough connections to prevent continuing rolling blackouts.
Basically, Texas has its own grid to avoid dealing with — you guessed it — the feds.
www.chron.com