Reduction of short circuit current using DC transmission and split-winding power transformer

Krakhmalin, Igor, Chivenkov, Alexandr, Vagapov, Yuriy and Anuchin, Alecksey (2019) Reduction of short circuit current using DC transmission and split-winding power transformer. In: 54th IEEE Int. Universities Power Engineering Conference UPEC-2019, 3-6 Sept 2019, Bucharest, Romania.

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Abstract

This paper discusses a new scheme to reduce the level of fault currents in the feeder cable and power transformer windings under short-circuit conditions. The proposed scheme suggests splitting the feeder cable in two cables and connecting it to a network through two rectifier units. Therefore, the split windings of the power transformer are supplied by a six-conductor feeder using unidirectional dc current. Unidirectional magnetic flux produced by the windings are summarised in the transformer core resulting ac flux to ensure a normal transformer operation. The proposed scheme was analysed under short and open-circuit faults. It has been shown that the short-circuit currents in the cable conductors and transformer windings are reduced in 1.41 times in comparison to a conventional scheme.

Item Type: Conference or Workshop Item (Paper)
Keywords: short-circuit, dc transmission, split windings, power transformer, power distribution
Divisions: Applied Science, Computing and Engineering
Depositing User: Hayley Dennis
Date Deposited: 12 Nov 2019 15:23
Last Modified: 12 Nov 2019 15:23
URI: http://glyndwr.repository.guildhe.ac.uk/id/eprint/17513

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