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Title: Method of fault analysis and suppression of fault current in six-phase power transmission systems

Abstract

The case of infinitely large tertiary impedances for fault suppression in EHV and UHV transmission systems is discussed. Although the voltage rise of the sound phase in fault condition is considerably high, the almost-null fault control gives great advantages to the important (low-voltage) distribution lines. It is shown that: the fault analysis of a six-phase transmission line can be performed by the combined use of two- and three-phase symmetrical coordinate methods; the ground fault and short-circuited fault currents can be suppressed to the magnitude of the same order as the exciting current of the transformer; the induced electromotive force of the transformer winding of faulted phase is reduced to zero and therefore the arc ground fault current could be extinguished by itself; and the symmetric two-phase ground fault current reaches a considerably large magnitude (about one-half the single-phase line-to-ground fault current of conventional double-circuit three-phase transmission line) but its earth return component is almost zero if the ground faults on the two lines occur at the same point.

Authors:
;
Publication Date:
Research Org.:
Hiroshima Univ., Japan
OSTI Identifier:
5949373
Resource Type:
Journal Article
Journal Name:
Electr. Eng. Jpn. (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 99:5; Other Information: Translated from Denki Gakkai Ronbunshi, B; 99: No. 9, 577-584(Sep 1979)
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; EHV AC SYSTEMS; ELECTRICAL FAULTS; STABILIZATION; UHV AC SYSTEMS; CONTROL; CONTROL SYSTEMS; DESIGN; EXPERIMENTAL DATA; MATHEMATICAL MODELS; PERFORMANCE; THEORETICAL DATA; TRANSFORMERS; AC SYSTEMS; DATA; ELECTRICAL EQUIPMENT; ENERGY SYSTEMS; EQUIPMENT; INFORMATION; NUMERICAL DATA; POWER SYSTEMS; 200301* - Power Transmission & Distribution- AC Systems, EHV & UHV- (-1989)

Citation Formats

Onogi, Y, and Okumoto, Y. Method of fault analysis and suppression of fault current in six-phase power transmission systems. United States: N. p., 1979. Web. doi:10.1002/eej.4390990507.
Onogi, Y, & Okumoto, Y. Method of fault analysis and suppression of fault current in six-phase power transmission systems. United States. doi:10.1002/eej.4390990507.
Onogi, Y, and Okumoto, Y. Sat . "Method of fault analysis and suppression of fault current in six-phase power transmission systems". United States. doi:10.1002/eej.4390990507.
@article{osti_5949373,
title = {Method of fault analysis and suppression of fault current in six-phase power transmission systems},
author = {Onogi, Y and Okumoto, Y},
abstractNote = {The case of infinitely large tertiary impedances for fault suppression in EHV and UHV transmission systems is discussed. Although the voltage rise of the sound phase in fault condition is considerably high, the almost-null fault control gives great advantages to the important (low-voltage) distribution lines. It is shown that: the fault analysis of a six-phase transmission line can be performed by the combined use of two- and three-phase symmetrical coordinate methods; the ground fault and short-circuited fault currents can be suppressed to the magnitude of the same order as the exciting current of the transformer; the induced electromotive force of the transformer winding of faulted phase is reduced to zero and therefore the arc ground fault current could be extinguished by itself; and the symmetric two-phase ground fault current reaches a considerably large magnitude (about one-half the single-phase line-to-ground fault current of conventional double-circuit three-phase transmission line) but its earth return component is almost zero if the ground faults on the two lines occur at the same point.},
doi = {10.1002/eej.4390990507},
journal = {Electr. Eng. Jpn. (Engl. Transl.); (United States)},
number = ,
volume = 99:5,
place = {United States},
year = {1979},
month = {9}
}