Railway frequency systems are developed at the beginning of railway line electrification in order to raise contact line voltage, and thus transmissible power voltage, by means of electromechanical transformers, and simultaneously use commutator motors similar to the direct current ones, which used to allow for finer speed regulation and a sole contact wire. Two single‐phase transformers, each capable of powering the concerned sectors on its own, are usually installed in the substations. In principle, railway frequency systems are similar to alternating current ones in the case of centralized distribution or more similar to direct current ones in the case of distributed conversion. In a distributed conversion system, the substations are connected directly to the industrial network and fulfill the dual function of transformation and conversion of phase and frequency.
Single‐Phase Networks at Railway Frequency
2018-02-12
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Railway traction by single-phase current at industrial frequency
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