Comparison of low-impedance restricted earth fault protection in power- transformer numerical relays

B. Nim Taj; A. Mahmoudi; S. Kahourzade

Comparison of low-impedance restricted earth fault protection in power- transformer numerical relays

B. Nim Taj, A. Mahmoudi, S. Kahourzade

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Low-impedance restricted earth fault (REF) protection protects transformer winding via earthed star-point. This paper compares the REF algorithms of five numerical relays: ABB's, AREVA T&D's, SIEMENS's, SCHNEIDER ELECTRIC's and GENERAL ELECTRIC's. Investigated were their advantages and disadvantages in speed, sensitivity, and selectivity. Also, magnetizing inrush current, over excitation, and CT saturation impression on REF operation, are presented. Postassessment, the results were confirmed via simulation on MATLAB SIMULINK. Further investigated were relay operation characteristic curves and restraint currents of each algorithm.

Original language	English
Pages (from-to)	2458-2474
Number of pages	17
Journal	Australian Journal of Basic and Applied Sciences
Volume	5
Issue number	12
Publication status	Published - 1 Dec 2011

Keywords

Low-impedance restricted earth fault
Numerical relay
REF
Transformer protection

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title = "Comparison of low-impedance restricted earth fault protection in power- transformer numerical relays",

abstract = "Low-impedance restricted earth fault (REF) protection protects transformer winding via earthed star-point. This paper compares the REF algorithms of five numerical relays: ABB's, AREVA T&D's, SIEMENS's, SCHNEIDER ELECTRIC's and GENERAL ELECTRIC's. Investigated were their advantages and disadvantages in speed, sensitivity, and selectivity. Also, magnetizing inrush current, over excitation, and CT saturation impression on REF operation, are presented. Postassessment, the results were confirmed via simulation on MATLAB SIMULINK. Further investigated were relay operation characteristic curves and restraint currents of each algorithm.",

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N2 - Low-impedance restricted earth fault (REF) protection protects transformer winding via earthed star-point. This paper compares the REF algorithms of five numerical relays: ABB's, AREVA T&D's, SIEMENS's, SCHNEIDER ELECTRIC's and GENERAL ELECTRIC's. Investigated were their advantages and disadvantages in speed, sensitivity, and selectivity. Also, magnetizing inrush current, over excitation, and CT saturation impression on REF operation, are presented. Postassessment, the results were confirmed via simulation on MATLAB SIMULINK. Further investigated were relay operation characteristic curves and restraint currents of each algorithm.

AB - Low-impedance restricted earth fault (REF) protection protects transformer winding via earthed star-point. This paper compares the REF algorithms of five numerical relays: ABB's, AREVA T&D's, SIEMENS's, SCHNEIDER ELECTRIC's and GENERAL ELECTRIC's. Investigated were their advantages and disadvantages in speed, sensitivity, and selectivity. Also, magnetizing inrush current, over excitation, and CT saturation impression on REF operation, are presented. Postassessment, the results were confirmed via simulation on MATLAB SIMULINK. Further investigated were relay operation characteristic curves and restraint currents of each algorithm.

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