TY - GEN
T1 - Distribution Transformer Frequency Response Analysis
T2 - 19th IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2019
AU - Nurmanova, Venera
AU - Sultanbek, Adilet
AU - Bagheri, Mehdi
AU - Ahangar, Roya Ahmadi
AU - Abedinia, Oveis
AU - Phung, Toan
AU - Gharehpetian, Gevork B.
N1 - Funding Information:
This work was supported in part by Faculty Development Competitive Research Grant of Nazarbayev University (Project No. SOE2018018).
Publisher Copyright:
© 2019 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2019/6
Y1 - 2019/6
N2 - Transformer Frequency Response Analysis (FRA) is one of the most efficient methods to examine the mechanical condition of the transformer without opening the transformer tank and extracting the active part. FRA is a comparative method, where the measured response curve is compared to the reference trace. In this study, various statistical indices for frequency response results interpretation are introduced and the influence of inter-disk fault on each method is evaluated via practical study. Performance of each indicator is discussed and the most reliable index for FRA results interpretation in inter-disk fault suggested. Practical study of inter-disk short-circuit is performed by the rheostat connected in parallel with the winding of distribution transformer. The voltage taps of the transformers are used in order to have the access to different percentage of the transformer winding. Thus by regulating transformer output voltage and emulating short-circuit, there is possibility to distinguish the critical values for "green", "yellow" and "red" zones for transformer FRA and condition evaluation. These critical zone values are advised to be used for assessing the transformer and FRA data via statistical indicators.
AB - Transformer Frequency Response Analysis (FRA) is one of the most efficient methods to examine the mechanical condition of the transformer without opening the transformer tank and extracting the active part. FRA is a comparative method, where the measured response curve is compared to the reference trace. In this study, various statistical indices for frequency response results interpretation are introduced and the influence of inter-disk fault on each method is evaluated via practical study. Performance of each indicator is discussed and the most reliable index for FRA results interpretation in inter-disk fault suggested. Practical study of inter-disk short-circuit is performed by the rheostat connected in parallel with the winding of distribution transformer. The voltage taps of the transformers are used in order to have the access to different percentage of the transformer winding. Thus by regulating transformer output voltage and emulating short-circuit, there is possibility to distinguish the critical values for "green", "yellow" and "red" zones for transformer FRA and condition evaluation. These critical zone values are advised to be used for assessing the transformer and FRA data via statistical indicators.
KW - correlation coefficient
KW - frequency response analysis
KW - frequency response interpretation
KW - statistical indices
KW - transformer analysis
UR - http://www.scopus.com/inward/record.url?scp=85070817323&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070817323&partnerID=8YFLogxK
U2 - 10.1109/EEEIC.2019.8783252
DO - 10.1109/EEEIC.2019.8783252
M3 - Conference contribution
AN - SCOPUS:85070817323
T3 - Proceedings - 2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2019
BT - Proceedings - 2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2019
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 11 June 2019 through 14 June 2019
ER -