A wavelet-based restricted earth-fault power transformer differential protection

被引：11

作者：

Aires, M. N. O. ^{[1
]}

Medeiros, R. P. ^{[2
]}

Costa, F. B. ^{[1
]}

Silva, K. M. ^{[3
]}

Chavez, J. J. ^{[4
]}

Popov, M. ^{[4
]}

机构：

[1] Univ Fed Rio Grande do Norte, Natal, RN, Brazil

[2] Fed Rural Univ Semiarid, Caraubas, RN, Brazil

[3] Univ Brasilia, Brasilia, DF, Brazil

[4] Delft Univ Technol, Delft, Netherlands

来源：

ELECTRIC POWER SYSTEMS RESEARCH | 2021年 / 196卷

关键词：

Power transformer protection; Restricted earth fault protection; Turn-to-ground faults; Wavelet transform;

D O I：

10.1016/j.epsr.2021.107246

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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%.

引用

页数：7

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[2]

[Anonymous], MODERN SOLUTIONS PRO

[3]

Behrendt K., 2011, SEL J. Reliable Power, V2, P36

[4]

Blackburn J.L., 2006, Protective Relaying: Principles and Applications

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