Equivalent Scheme for Calculating Short-Circuit Current in an Alternating-Current Electric Traction Network

The authors have proved the feasibility of substitution of a three-phase power-supply system with a single-phase one when calculating three-phase circuits in electric traction network irrespectively of the external power supply arrangement. In addition, calculation features have been established for...

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Bibliographic Details
Published inRussian electrical engineering Vol. 90; no. 7; pp. 516 - 521
Main Authors German, L. A., Serebryakov, A. S., Osokin, V. L., Subkhanverdiev, K. S.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.07.2019
Springer Nature B.V
Subjects
Circuits
Engineering
Equivalent circuits
Machines
Manufacturing
Mathematical analysis
Power supplies
Processes
Short circuit currents
Substations
Traction
Transmission lines
short circuit
equivalent circuit
electric traction network
alternating current
transformer winding connection configuration
external power-supply arrangement
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Summary:The authors have proved the feasibility of substitution of a three-phase power-supply system with a single-phase one when calculating three-phase circuits in electric traction network irrespectively of the external power supply arrangement. In addition, calculation features have been established for particular transformer winding connection configurations (Y/Y or Y/Δ). Based on results of an analysis performed for minimizing the methodological error in calculating the short-circuit currents, a single-phase equivalent circuit has been developed for the intersubstation zone of the traction network, which takes into account the connection between two adjacent substations via an overhead transmission line of 110 (220) kV. An example of calculation in accordance with the proposed replacement scheme is given.
ISSN:1068-3712
1934-8010
DOI:10.3103/S1068371219070058