Our substations are the point at which power grid infrastructure becomes distribution. The electricity supply chain consists of three primary segments: generation, where electricity is produced; transmission, which moves power over long distances via high-voltage power lines; and distribution, which moves power over shorter distances to end users (homes, businesses, industrial sites. The place where electricity converts from "transmission" to "distribution" occurs is in a power substation. For power to be useful in a home or business, it comes off the transmission grid and is stepped-down to the distribution grid. This may happen in several phases. The place where the. Real-Time Balancing Act: The power grid operates as the world's largest machine, requiring precise matching of electricity supply and demand every second of every day, since electricity cannot be stored economically at scale. AC power distribution systems are designed to provide electricity to users in the residential, commercial, and industrial sectors in a safe, efficient. Electrical power travels from the power plant to the industrial plant through the power distribution grid. All commercial electrical generators of any size generate three-phase ac.