How to Explain What a Power Grid Is

A power grid distributes electricity throughout the area.

A power grid is a high voltage transmission network of interconnected power transmission lines. These transmission lines consist of wires, transformers, substations and other infrastructures that provide a large pool of electricity. The power grid delivers electricity from suppliers to consumers. To explain what a power grid is, you will need to describe in steps how it works by delivering electricity. The terms "power grid" and "electric grid" can be used interchangeably.

Instructions

1. Spin a large generator to create power; this is typically done with steam, water or wind. The generator produces electricity which is then transferred into the control center. There are more than 100 control centers in the United States.

2. Transfer power to different areas from the control center. Power is transferred from areas of low demand to areas of high demand. This is usually done by simply flipping a switch and sending the power to substations.

3. Reduce the current, or voltage, through a step known as "stepping down" the circuit.

4. Pump the power into the power lines. Power lines are power cables and wires we see attached to homes and buildings in every neighborhood.

5. Reduce the voltage even further through various small transformers throughout the area.

6. Turn on a light switch or plug in any electrical appliance and the power is pushed through wires in the building and into the switch. This completes the power grid system.

References

• Bright Hub: Power Grids Explained
• NJ Clean Energy: FAQS
• NPR: Visualizing the U.S. Electric Grid