transformer station
A transformer station is a facility in an electrical power network where the different AC voltage levels of extra high voltage, high voltage, medium voltage and low voltage are adapted to each other.
Electrical supply networks are subject to a hierarchy characterized by different voltage levels. Extra-high voltage networks have voltages of over 220 kV, high-voltage networks have values of 60 kV and 110 kV, medium-voltage networks have values between 3 kV and 30 kV, and low-voltage networks have values of 230 V for single- phase current and 400 V for three-phase current.
Transformer stations ensure voltage matching of the different voltage levels. They operate as transformer stations in which power transformers and switchgear transform the AC voltage of the supraregional extra-high voltage networks into high voltage or medium voltage. The transformed electrical power is transformed via regional transport networks and local and supra-local distribution networks and is available to end consumers after being transformed again.