Electricity is generated at power plants. You know that already. But to really understand how it gets to your house—and why you can count on it getting there reliably—you have to understand that our electric system is more complicated than it looks. The electric grid isn't just about you and your connection to a power plant. There are lots of thing that have to happen behind the scenes to make sure your refrigerator stays cold and your lights turn on.
One of the key components in the system are grid control centers—places where technicians manage electric supply and electric demand. This is important. In order for the grid to operate without blackouts there must always be an almost perfect balance between supply and demand. The grid doesn't really include any electrical storage, so that balance has to be maintained manually—on a minute-by-minute basis—by grid controllers who work 24 hours a day, 7 days a week. This isn't the best way to make a grid work, but it's what we've done since the earliest days of electricity.
In the April issue of Discover, I take readers on a tour of one of these grid control centers.
1. A River Runs Through It
Power plants generate electricity, but they do not create anything from scratch. Instead, generators take electrons, which normally orbit the nucleus of an atom, and force them to move independently through the grid’s closed path. When too many electrons build up or their numbers in the system (monitored here) fall too low, you get a total loss of power: a blackout.
Read the rest of story at Discover
Meet the grid controllers and learn more about the inner workings of our electric system in my book, Before the Lights Go Out.
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