What Is A Black Start Of The Power Grid?

that to refrigerators, ovens, freezers and water heaters, and you can imagine the enormous initial demand on the

grid

after a prolonged outage. And don't forget that many of these devices use inductive motors that have huge input currents. For example, here is an ammeter on the motor of my table saw as I

start

it. It draws a whopping 28 amps as it accelerates before settling at 4 amps at no load. Imagine the demand for thousands of engines like this all

start

ing at exactly the same instant. The technical term for this is cold load activation, and it can be eight to ten times the normal electrical demands before the load diversity begins to average out again, usually after about 30 minutes.

Therefore, network operators must be very deliberate about how many customers they restore service to at once. If you ever see your neighbor a few blocks away getting

power

before you, keep in mind this delicate balancing act that operators must perform to get the

grid

through cold load startup for each new group of customers that join. connect. The ability to quickly restart a

power

grid after a complete collapse is very important because electricity is vital to our health and safety. After the 2003

black

out in the United States, new reliability standards were issued, including one that requires grid operators to have detailed system restoration plans.

That includes maintaining

black

start sources, although it is usually incredibly expensive. Some reserve teams do just that: stand by. But it still needs to be carefully maintained and tested periodically in the rare event that it comes into service. Additionally, the network is incredibly vulnerable during a black boot, and if something goes wrong, the breakers can trip and you may have to start over. Utility companies have strict security measures in place to try to ensure that no one can intentionally disable or thwart the black start process. Finally, they perform detailed analyzes to ensure they can create their grid from scratch, including tests and even exercises to practice the procedures;

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