Video narration
Think of the electricity grid as a relay system that moves energy from where it’s made to where it’s used. It starts at generators—power plants, wind, solar, or hydro—turning motion into electrical energy. That electricity is sent onto high-voltage transmission lines, because higher voltage lets the same power travel long distances with less loss. Along the way, substations switch routes and use transformers to step voltage down. Then local distribution lines carry it through towns and neighborhoods. A final transformer brings it to a safe level for homes and businesses, where devices convert it into light, heat, and motion. The grid must stay in balance every second: operators and automated controls match supply to demand, while the system’s alternating current keeps energy continuously exchanging back and forth as it flows through the network. That coordination is what makes electricity feel instant and reliable.