Here is the summer training report on Uttar Pradesh power transmission corporation limited..
“Electric Power is generated in Power Stations and transmitted to various cities and towns. During transmissions, there are power (energy) loss and the whole subject of Transmission and Distribution... An electrical substation is a subsidiary station of an electricity generation, transmission and distribution system where voltage is transformed from high to low or the reverse using
transformers. Electric power may flow through several substations between generating plant and consumer, and may be changed in voltage in several steps. The word substation comes from the days before the distribution system became a grid. The first
substations were connected to only one power station where the generator was housed, and were subsidiaries of that power station.
Please see the attached file along with this.