How is electrical power transmitted by power stations?
On a basic level, the transmission of electricity is a very simple process.
In a power generating plant, electric current is generated by spinning magnets within coiled wires. When current is created, it will travel along any conducting material, such as electric transmission wires.
It is much more efficient to transmit power at high voltage so traditionally transformers have been used to boost alternating current to high voltage for transmission. Other transformers later reduce the voltage so the current may be used in homes.
Steam is generated at the electricty plant by the burning of fossil fuels - or at a nuclear or hydroelectric plant. The steam powers a turbine which spins a huge magnet inside a copper wire. Heat energy converts to mechanical energy which then converts to electrical energy in the generator. Elecricity flows from the power plant through wires to the step up transformer. The transformer raises the pressure so it can travel long distances - its raised as high as 756,000 volts The electric current then runs through the power lines to the substation transformer where pressure is lowered to between 2000 and 13000 volts Electricity is then taken through the lines to a pole transfomer - or a transformer box if underground - and pressure is lowered again to between 120 and 240 volts From here electricity comes into your home through a service box, where your meter is located to measure how much you use. Wires take electricty around your home powering your lights and all your other appliance.