Título:	A wavelet-based busbar differential protection
Autor(es):	Silva, Kleber Melo e Escudreo, Alfredo Miguel P. Lopes, Felipe Vigolvino Costa, Flávio Bezerra
Assunto:	Wavelets (Matemática) Proteção diferencial
Data de publicação:	2017
Abstract:	This paper presents a new wavelet-based busbar differential protection algorithm, named as 87BW function. The instantaneous current-based differential protection fundamentals are taken into account and the well-known 1-out-of-1 and 2- out-of-2 tripping logics are mapped into the wavelet domain. Operating and restraint wavelet coefficients energy of currents are computed, regarding station configuration and bus zones boundaries. Thereby, the proposed 87BW function can be properly used in both static and dynamic busbar configuration. Its performance was evaluated through EMTP-based simulations of faults in a 230 kV power substation with double bus single breaker configuration. The obtained results reveal it provides ultra-high-fast trip for internal and evolving external-to-internal faults, guaranteeing security for normal through-load and external faults as well, even in the case of early and severe current transformer (CT) saturation.
Unidade Acadêmica:	Faculdade de Tecnologia (FT) Departamento de Engenharia Elétrica (FT ENE)
Informações adicionais:	This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Citation information: DOI 10.1109/TPWRD.2017.2764058, IEEE Transactions on Power Delivery.
Licença:	Autorização concedida ao Repositório Institucional da Universidade de Brasília (RIUnB) pelo Professor Kleber Melo e Silva, em 31 de janeiro de 2019, para disponibilizar o trabalho, gratuitamente, para fins de leitura, impressão e/ou download, a título de divulgação da obra.
Versão da editora:	https://ieeexplore.ieee.org/document/8070327
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