The power grid is the system of producers and consumers of electricity. It includes power generators, the users of electricity, switches that control the electricity, and the system of substations, power lines, and transformers that deliver the electricity.
A community might have a generator to provide its power. The generator may be able to vary its production as the usage of the customers changes, but there may be times when the demand for energy is too great for the generator. Then the community buys electricity from another source. At other times, the generator may be making more electricity than the community is using, so it wants to sell it.
When the applet opens, are the generators making more or less power than the communities are using?
Resources for Students and Teachers
We have recorded a short tutorial for this applet, to help familiarize you with how to use it.
Use this quick-start guide to learn about the features of this applet.
Lessons have been created to help you use this applet in your classroom.