![transmission definition transmission definition](https://qsstudy.com/wp-content/uploads/2017/01/transmission-of-light.jpg)
Transmission lines mostly use high-voltage AC (alternating current), but an important class of transmission line uses high voltage direct current. This reduces the losses produced by heavy current. The combined transmission and distribution network is part of electricity delivery, known as the electrical grid.Įfficient long-distance transmission of electric power requires high voltages. This is distinct from the local wiring between high-voltage substations and customers, which is typically referred to as electric power distribution. The interconnected lines which facilitate this movement are known as a transmission network. Five-hundred kilovolt (500 kV) Three-phase electric power Transmission Lines at Grand Coulee Dam four circuits are shown two additional circuits are obscured by trees on the far right the entire 7079 MW nameplate generation capacity of the dam is accommodated by these six circuits.Įlectric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation.