What is a substation

A substation, as the name implies, is a place where the voltage is changed. It is a place where the voltage and current of electric energy are transformed, concentrated and distributed in the electric power system. In order to ensure the quality of power and the safety of equipment, voltage adjustment, power flow (the flow and distribution of voltage, current and power in each node and branch in the power system) control, as well as transmission and distribution lines and Protection of main electrical equipment. According to the purpose, it can be divided into power substation and traction substation (for electric railway and tram). The term defined in the national standard GB 50053-94 "Code for Design of Substations 10kv and Below" is "the AC power source of 10kv and below is transformed by a power transformer to supply power to electrical equipment." Place.