TY - GEN
T1 - A new current-based technique for discriminating between internal faults and inrush current within power transformers
AU - El-Naggar, M. F.
AU - Abu-Siada, A.
AU - Mahmoud, A. M.
AU - El Mola, Khaled M.Gad
N1 - Publisher Copyright:
© 2015 Taylor & Francis Group, London.
PY - 2015
Y1 - 2015
N2 - In rush current may lead to a false operation of the power transformer differential protection relay. Hence, it is very essential to distinguish in rush current from various internal transformer faults in order to improve the reliability of the differential protection scheme. This paper presents a new current-based technique to discriminate transformer inrush current from transformer internal faults. The proposed technique relies on converting the three phase transformer currents on both sides into modal current components using Clarke’s transformation to produce three current modes, namely, ground mode, aerial mode 1 and aerial mode 2. The features extracted from the three modes are then applied to the inrush discrimination equation proposed in this paper. The robustness of the proposed technique is evaluated through extensive simulation studies on a 132/15 KV, 155MVA power transformer using an Electromagnetic Transient Program (EMTP-ATP). Simulation results show the effectiveness of the new proposed technique in discriminating magnetizing in rush current from other transformer internal faults.
AB - In rush current may lead to a false operation of the power transformer differential protection relay. Hence, it is very essential to distinguish in rush current from various internal transformer faults in order to improve the reliability of the differential protection scheme. This paper presents a new current-based technique to discriminate transformer inrush current from transformer internal faults. The proposed technique relies on converting the three phase transformer currents on both sides into modal current components using Clarke’s transformation to produce three current modes, namely, ground mode, aerial mode 1 and aerial mode 2. The features extracted from the three modes are then applied to the inrush discrimination equation proposed in this paper. The robustness of the proposed technique is evaluated through extensive simulation studies on a 132/15 KV, 155MVA power transformer using an Electromagnetic Transient Program (EMTP-ATP). Simulation results show the effectiveness of the new proposed technique in discriminating magnetizing in rush current from other transformer internal faults.
UR - http://www.scopus.com/inward/record.url?scp=84962141730&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84962141730
SN - 9781138028128
T3 - Testing and Measurement: Techniques and Applications - Proceedings of the 2015 International Conference on Testing and Measurement: Techniques and Applications, TMTA 2015
SP - 195
EP - 200
BT - Testing and Measurement
A2 - Chan, Kennis
PB - CRC Press/Balkema
T2 - International Conference on Testing and Measurement: Techniques and Applications, TMTA 2015
Y2 - 16 January 2015 through 17 January 2015
ER -