Power Grid Substation is one of the parts of electrical generation, distribution and transmission system. These substations are used for transforming high voltage to low voltage or from low voltage to high voltage. Between consumer and generating station, the power of electric may flow from many different substations at different levels of voltage.
Generally, substations are operated and owned by a large industrial customer. Most of the time, substations are unattended, and are reliable on SCADA for the remote control and supervision. A substation may include a large number of transformers to change voltage levels between lower distribution voltages and high transmission voltages. As soon as the central station became larger, smaller generating plants were transformed into distribution stations. These distribution stations receive the supply of energy from larger plants despite having their own generators.
Substations are on the surface in fenced enclosures or are located in special purpose building or underground. High-rise buildings may have many indoor substations. Generally, these indoor stations are found in the urban areas to reduce noise produced from transformers.