Open AccessA Novel Transformer Winding Fault Diagnosis Method Based on Damped Oscillation Wave
Author(s) -
Zhuorui Jin,
Jia Lin Sun,
Qing Yang,
Peiyu Su
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1619/1/012008
Subject(s) - transformer , electromagnetic coil , amplitude , delta wye transformer , autotransformer , voltage , electrical engineering , transfer function , rotary variable differential transformer , engineering , linear variable differential transformer , control theory (sociology) , acoustics , physics , distribution transformer , computer science , optics , control (management) , artificial intelligence
Winding status is an important part of transformer fault diagnosis. In this paper, the diagnosis test platform includes a reduced-scale transformer with the connection group model of Y n y n0 , and its voltage ratio is 10 kV/0.4 kV. The voltage response of single-phase windings of three-winding transformers with varying degrees of short-circuit faults is measured under a damped oscillation wave with an amplitude of 4 kV and an equivalent frequency of 20 kHz. The transfer function of high-voltage phase and its corresponding low-voltage phase in the normal and fault condition is calculated. Three characteristic criterion of the transfer function are analysed in order to diagnose short-circuit faults in single-phase windings of three-winding transformers.