The Big Electric Journey

When a child turns on a lamp, it can seem as though electricity simply appears.The power grid reveals the much bigger story. Electricity can be generated in many different ways and at many different locations. High-voltage transmission systems move electrical energy efficiently over long distances. Substations and transformers change voltage as electricity moves between different parts of the system. Distribution networks then deliver electricity to homes, schools, businesses, and other users.One of the grid's most remarkable challenges is balance: electricity production and consumption must remain closely matched. Because people's electricity use changes constantly, grid operators coordinate many generators and other resources to keep the system operating reliably.The next time a child asks, "Where does electricity come from?", the answer is not simply "the power plant."It comes from a network - a remarkable piece of engineering that connects sources of energy with the people who use it.