Electrical substation is a part of an electrical generation system. It receives electric power from generating station with the help of transformers, which transfer the high voltage to low and vice-versa. The substation is an important part of the power system as they link between generation , transmission and distribution system. The three types of Electrical substation are:
1) Transmission substation: It connects transmission lines when the voltage level of all lines are same. They are the largest substation with very high-voltage and mostly located outside the densely populated area.
2) Distribution substation: It transfers the power from Transmission system to the Distribution system. It is commonly consists of two transmission lines that reduces the voltage level that is usable at home and business. It is mostly located closer to the populated area.
3) Collector substation: A collector substation may be required in the distribution generating projects like in a wind farm. Wind turbines are grouped together and each turbine extracts some energy from wind and these energies are collected together to produce electricity. Though the energy flows in opposite direction from wind turbines into transmission grid.