A power station can generate and transmit electrical power to end users. The key functions of a power station are:
Generate electricity - A power station has large generator machines that convert kinetic energy into electrical energy. The generators are powered by combustion engines fueled by coal, natural gas, oil, or nuclear reactors. Renewable energy sources like hydropower, wind, and solar can also be used.
Step up voltage - The generated electricity has a low voltage which needs to be stepped up using transformers before transmission. Higher voltage allows electricity to transmit over long distances with less losses.
Transmit power - The high voltage electricity is transmitted through transmission lines to substations close to end users. The transmission lines can cover hundreds of miles.
Distribute power - The high voltage electricity is stepped down at substations and distributed through smaller distribution lines to businesses and homes.
Provide power on demand - Power stations must adjust their output to match the fluctuating electricity demand from consumers in real time. They have to balance the electrical grid constantly.
So in summary, a power station generates electricity from various energy sources and then transmits and distributes that power via a network of transmission lines, substations, and distribution lines to provide electricity to end users when they need it. Without power stations, there would be no electricity for our modern lives.