The BERNARD Gruppe provides design services for rectifier substations in all service phases for a large number of public transport operators.
In public transport, electricity is mainly needed to provide traction power, but also to operate switches and heat them in winter, or to run train signals. Most tram lines or local trains require DC voltage. However, the “power via the electric socket” is an alternating current. The conversion into DC voltage is carried out in so-called rectifier substations.
The basic structure of a rectifier substation consists of a medium-voltage switchgear, a transformer, a rectifier and a DC switchgear. To ensure efficient power transmission, a rectifier substation is required approximately every 2 km. Various properties, notably voltage and current, are monitored in the stations. If several substations are required, they will be interconnected in a separate communication network.
Stefan Jorthan, BERNARD Gruppe