Primary technical power losses in the system of railway traction power supply are described that may be reduced by means of superconducting inductive energy storage (SIES). The SIES is a device in which electric energy is accumulated in the form of energy of a magnetic field created by an undamped (frozen) current in a superconducting (SC) coil with almost zero active resistance. Main SIES construction elements and its operation principle are described. Based on data from experiments and imitation modeling, values on the order of the SIES energy capacity, as well as its mass and overall dimension parameters, are determined. A particular section of the Moscow railway is considered where SIES application may already be profitable. Components are shown in which the technical and economical efficiency of the SIES application may be estimated. Cost cutting results mainly from reducing capital costs for the main traction equipment, a reduction in or the absolute absence of capital expenditures for the construction of feeding power transmission lines, return of the recuperation energy, and increase of electricity power rates. For the example discussed, a payback time of approximately 5 to 7 years is reached, if SIES is installed under the current economical conditions. Assuming that the costs of the SIES components will be cut substantially over the next decade, their application will become even more profitable.
Power-saving circuits of railway traction power supply based on superconducting inductive energy storage
Energieeinsparungspotenzial in der Bahnstromversorgung auf Basis supraleitender induktiver Energiespeicher
Russian Electrical Engineering ; 79 , 7 ; 377-381
2008
5 Seiten, 4 Bilder, 6 Quellen
Aufsatz (Zeitschrift)
Englisch
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