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Three-system and single-system static distance relays

Parthasarathy, K (1966) Three-system and single-system static distance relays. In: Proceedings of the Institution of Electrical Engineers, 113 (4). pp. 641-651.

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Static distance relays employing semiconductor devices as their active elements offer many advantages over the conventional electromagnetic and rectifier relays. The paper describes single-system and three-system static distance relays, which depend for their operation on the instantaneous-comparison or `block-spike¿ scheme. Design principles and typical discriminating and logic circuits are described for the new relaying equipment. The relaying circuitry has been devised for obtaining uniform performance on all kinds of faults, by the use of two phase detectors¿one for multiphase faults and one for earth faults. The phase detector for multiphase faults provides an improved polar characteristic in the complex-impedance plane, which fits only around the fault area of a transmission line. The other features of the relay are: reliable pickup for close-in faults, least susceptibility to maloperation under power-swing conditions, and reduction in cost and panel space required. The operating characteristics of the relays, as expressed by accuracy/range charts, are also presented.

Item Type: Journal Article
Publication: Proceedings of the Institution of Electrical Engineers
Publisher: IEEE
Additional Information: Copyright 1966 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 27 Feb 2012 10:52
Last Modified: 27 Feb 2012 10:52
URI: http://eprints.iisc.ac.in/id/eprint/43072

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