Título :	A wavelet-based restricted earth-fault power transformer differential protection
Autor :	Aires, M. N. O. Medeiros, R. P. Costa, F. B. Silva, Kleber Melo e Chavez, J. J. Popov, M.
Assunto::	Proteção de transformadores Aterramento elétrico Transformada wavelet
Fecha de publicación :	2021
Editorial :	Elsevier
Citación :	AIRES, M. N. O. et al. A wavelet-based restricted earth-fault power transformer differential protection. Electric Power Systems Research, v. 196, 107246, 2021. DOI: https://doi.org/10.1016/j.epsr.2021.107246.
Abstract:	This paper proposes a restricted earth fault protection based on the wavelet transform (REFW) for detecting ground faults close to the transformer neutral point (turn-to-ground faults) and supporting the conventional phase differential protection, which presents limitations in this kind of faults. The proposed REFW protection uses only high-frequency components instead of phasor estimation, speeding up the detection of turn-to-ground faults. A performance comparison between the proposed wavelet-based restricted earth-fault differential protection and the respective conventional restricted earth-fault (REF) unit was accomplished considering simulated turn-to-ground faults, involving a few winding turns. The proposed method is more efficient and faster than the conventional one, reaching a success rate of 100%.
DOI:	https://doi.org/10.1016/j.epsr.2021.107246
metadata.dc.relation.publisherversion:	https://www.sciencedirect.com/science/article/abs/pii/S0378779621002273
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