Brownouts in the winter and now maybe electrical brownouts in the summer. What's going on?
Well, ERCOT is the name of the entity that supplies electricity in Texas.
I found this article from 2008 that breaks down the history, law and intent of ERCOT's mission. Even though some time has passed, it's a pretty good introduction to the subject.
There is also a very good summary discussion of the different models of
electricity distribution (including regulation vs deregulation) in Energy for the 21st Century.