TY - GEN
T1 - Bushing characteristic impacts on on-line Frequency Response Analysis of transformer winding
AU - Bagheri, Mehdi
AU - Naderi, Mohammad Salay
AU - Blackburn, Trevor
AU - Phung, B. T.
PY - 2012/12/1
Y1 - 2012/12/1
N2 - Diagnosis of electrical equipment, particularly n and power transformers has been quite important for quite a long time. Frequency Response Analysis (FRA) has been introduced years ago and has been employed as an off-line diagnosis test since last decade to investigate transformer mechanical integrity. As smart high voltage monitoring concept is under developing, on-line transformer winding deformation diagnosis has been investigated and discussed significantly over the last years. Hence, on-line diagnosis method implementations have become important accordingly. This study has concentrated on issues arising while on-line FRA is going to be employed on transformers. Existing off-line and on-line transformer winding deformation diagnosis methods are discussed and an on-line frequency response analysis measurement setup is proposed. A profound insight to the challenges associated with on-line FRA measurement has been provided. Influence of on-line setup on frequency response trace sensitivity, accuracy and interpretation has been highlighted. In the end, practical study has been performed on a 66 kV interleaved winding connected various types of capacitive bushings to explore the boundary condition for on-line FRA setup design and to address fundamental challenges.
AB - Diagnosis of electrical equipment, particularly n and power transformers has been quite important for quite a long time. Frequency Response Analysis (FRA) has been introduced years ago and has been employed as an off-line diagnosis test since last decade to investigate transformer mechanical integrity. As smart high voltage monitoring concept is under developing, on-line transformer winding deformation diagnosis has been investigated and discussed significantly over the last years. Hence, on-line diagnosis method implementations have become important accordingly. This study has concentrated on issues arising while on-line FRA is going to be employed on transformers. Existing off-line and on-line transformer winding deformation diagnosis methods are discussed and an on-line frequency response analysis measurement setup is proposed. A profound insight to the challenges associated with on-line FRA measurement has been provided. Influence of on-line setup on frequency response trace sensitivity, accuracy and interpretation has been highlighted. In the end, practical study has been performed on a 66 kV interleaved winding connected various types of capacitive bushings to explore the boundary condition for on-line FRA setup design and to address fundamental challenges.
KW - Frequency response analysis
KW - On-line diagnosis
KW - Transformer
KW - Winding deformation
UR - http://www.scopus.com/inward/record.url?scp=84874475854&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84874475854&partnerID=8YFLogxK
U2 - 10.1109/PECon.2012.6450356
DO - 10.1109/PECon.2012.6450356
M3 - Conference contribution
AN - SCOPUS:84874475854
SN - 9781467350198
T3 - PECon 2012 - 2012 IEEE International Conference on Power and Energy
SP - 956
EP - 961
BT - PECon 2012 - 2012 IEEE International Conference on Power and Energy
T2 - 2012 IEEE International Conference on Power and Energy, PECon 2012
Y2 - 2 December 2012 through 5 December 2012
ER -