Computer-aided analysis of high-speed protective relays

Kothari, GC and Khincha, HP and Ashok Kumar, BS and Parthasarathy, K (1974) Computer-aided analysis of high-speed protective relays. In: Proceedings of the Institution of Electrical Engineers, 121 (7). pp. 687-694.

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Abstract

Most of the modern distance relays are designed to avoid overreaching due to the transient d.c. component of the fault current, whereas a more likely source of transients in e.h.v. systems is the oscillatory discharge of the system charging current into the fault. Until now attempts have not been made to reproduce these transients in the laboratory. This paper describes an analogue and an accurate digital simulation of these harmonic transients. The dynamic behaviour of a typical polarised mho-type relay is analysed, and results are presented. The paper also advocates the use of active filters for filtering the harmonics associated with e.h.v. system, and hence, to improve the speed of response and accuracy of the protective relays.

Item Type:	Journal Article
Publication:	Proceedings of the Institution of Electrical Engineers
Publisher:	IEEE
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	05 Jan 2012 06:28
Last Modified:	10 Jan 2012 06:42
URI:	http://eprints.iisc.ac.in/id/eprint/43059

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