Effect of waveform distortion on protective relays

The influence of harmonics on protective relays is described theoretically, and the results of laboratory tests are given. Representative relays using various operating principles were tested using fundamental currents and/or voltages, single-frequency inputs that were multiples of the fundamental f...

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Published in:IEEE transactions on industry applications 1993-03, Vol.29 (2), p.404-411
Main Authors: Elmore, W.A., Kramer, C.A., Zocholl, S.E.
Format: Article
Language:English
Subjects:
Applied sciences
Coils
Current transformers
Distortion measurement
Disturbances. Regulation. Protection
Electrical engineering. Electrical power engineering
Electrical power engineering
Exact sciences and technology
Frequency
Laboratories
Power networks and lines
Power system harmonics
Power system protection
Power system relaying
Protective relaying
Relays
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description The influence of harmonics on protective relays is described theoretically, and the results of laboratory tests are given. Representative relays using various operating principles were tested using fundamental currents and/or voltages, single-frequency inputs that were multiples of the fundamental frequency, realistic combinations of fundamental and harmonics. From the theoretical concepts and expectations discussed and the test results, it is shown that the influence of mixed-frequency harmonics (with magnitude decreasing with order) on the steady-state behavior of the protective relays studied is insignificant. Pure single-frequency inputs, above the fundamental, caused a distinct change in relay operations.< >
doi_str_mv 10.1109/28.216551
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source IEEE Electronic Library (IEL) Journals
subjects Applied sciences
Coils
Current transformers
Distortion measurement
Disturbances. Regulation. Protection
Electrical engineering. Electrical power engineering
Electrical power engineering
Exact sciences and technology
Frequency
Laboratories
Power networks and lines
Power system harmonics
Power system protection
Power system relaying
Protective relaying
Relays
title Effect of waveform distortion on protective relays
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