Reliability and The Electric Grid

You may not think about it when you flip your light switch on, but the electric grid ensures that when you do, the lights come on. The U.S. power grid is the electrical system that connects electricity producers and consumers by transmission and distribution lines and related facilities. The U.S. power grid has evolved into three large interconnected systems that move electricity around the country (U.S. Energy Information Administration).

According to the U.S. Energy Information Administration, there are more than 450,000 miles of high voltage transmission lines in the U.S.  Transmission lines in the U.S. are divided into three integrated regional grids: 

  • Eastern Interconnection
  • Western Interconnection
  • Texas Interconnection