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Content Provider | IEEE Xplore Digital Library |
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Author | Darwish, H.A. Rahman, M.A. Taalab, A.I. Shaaban, H. |
Copyright Year | 1995 |
Description | Author affiliation: Fac. of Eng. & Appl. Sci., Memorial Univ. of Newfoundland, St. John's, Nfld., Canada (Darwish, H.A.; Rahman, M.A.) |
Abstract | In this paper a novel model of the overcurrent relay standard curves is presented. This model facilitates the implementation of these curves using microprocessors and a personal computer. The proposed model uniquely combines both direct data storage and curve fitting techniques. Tabulating one time-current curve corresponding to any time dial setting in addition to a number of coefficients are quite sufficient to get the tripping time values at any other time dial setting. The selection of the most suitable time-current curve and the minimum length of its corresponding table are determined. An alternative form of the model is developed for computer applications, in particular by replacing the table by its equivalent fitted equation. Both forms of the model are adapted to occupy the lowest possible storage memory. The validity of the analytical models is provided by the test results. |
Starting Page | 1187 |
Ending Page | 1192 |
File Size | 619333 |
Page Count | 6 |
File Format | |
ISBN | 0780330080 |
ISSN | 01972618 |
DOI | 10.1109/IAS.1995.530434 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 1995-10-08 |
Publisher Place | USA |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Microprocessors Memory Computer applications Microcomputers Application software Curve fitting Standards publication Digital relays Equations Testing |
Content Type | Text |
Resource Type | Article |
Subject | Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering |
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