Air Core Transformer Winding Disk Deformation: A Precise Study on Mutual Inductance Variation and Its Influence on Frequency Response Spectrum
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Access"
DOI: 10.1109/access.2017.2778270
Abstract: It is well-known that the deformation of transformer winding can produce detectable changes to the frequency response spectrum compared with a referenced past measurement. To interpret such changes for diagnostic purposes, main causes of the… read more here.
Keywords: variation; transformer; inductance; deformation ... See more keywords
Equivalent gradient area based fault interpretation for transformer winding using binary morphology
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2017.006237
Abstract: This paper proposes a novel fault interpretation method for transformer winding using features extracted from equivalent gradient areas of frequency responses. Firstly, frequency responses are pre-processed using binary morphology, aiming to eliminate the influence of… read more here.
Keywords: fault; equivalent gradient; fault interpretation; winding using ... See more keywords
Analysis of Structural Behavior of Transformer's Winding Under Inrush Current Conditions
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Industry Applications"
DOI: 10.1109/tia.2018.2808273
Abstract: The objective of this paper is to investigate the behavior of electromagnetic forces during the occurrence of faults inside transformers as result of transients in the electrical systems. The methodology is based on the modeling… read more here.
Keywords: structural behavior; transformer; inrush current; transformer winding ... See more keywords
On the Effect of Disorder on Stray Capacitance of Transformer Winding in High-Voltage Power Supplies
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2017.2652381
Abstract: Stray capacitance of transformer winding is an important parasitic element influencing the behavior of the switching power converters, especially for high-voltage transformers. There are various methods for calculating the stray capacitance in transformers and inductors… read more here.
Keywords: capacitance transformer; method; stray capacitance; transformer winding ... See more keywords
Transformer Winding Faults Detection Based on Time Series Analysis
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Instrumentation and Measurement"
DOI: 10.1109/tim.2021.3076835
Abstract: Monitoring of winding faults is of great significance for the assessment of the transformer maintenance status. In this study, the time series analysis is combined with frequency response analysis (FRA) for better interpretation and analysis… read more here.
Keywords: time series; test; series analysis; winding faults ... See more keywords
Generalized Analytical Expression for Natural Frequencies of a Single Isolated Air-Core Inhomogeneous Transformer Winding
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Power Delivery"
DOI: 10.1109/tpwrd.2016.2613119
Abstract: Given a completely inhomogeneous, fully-coupled, $N$ -section ladder network in which elements of each section are distinct from the others, there exists no closed-form solution which connects the ladder network elements to its natural frequencies.… read more here.
Keywords: single isolated; generalized analytical; transformer winding; ladder network ... See more keywords
Localization of Partial Discharges Inside a Transformer Winding Using a Ladder Network Constructed From Terminal Measurements
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Power Delivery"
DOI: 10.1109/tpwrd.2017.2683560
Abstract: Precise localization of partial discharge (PD) inside a power transformer winding is a challenging task. Previously, researchers have used internal calibration or reference signals to locate the PD source. The location of any arbitrary (test)… read more here.
Keywords: transformer; reference; ladder network; transformer winding ... See more keywords
Identification of Power Transformer Winding Fault Types by a Hierarchical Dimension Reduction Classifier
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DOI: 10.3390/en11092434
Abstract: Frequency response analysis (FRA) demonstrates significant advantages in the diagnosis of transformer winding faults. The instrument market desires intelligent diagnostic functions to ensure that the FRA technique is more practically useful. In this paper, a… read more here.
Keywords: dimension reduction; transformer winding; winding faults; hierarchical dimension ... See more keywords
Research on Online Detection Method of Transformer Winding Deformation Based on VFTO Characteristics
Sign Up to like & getrecommendations! Published in 2023 at "Energies"
DOI: 10.3390/en16083496
Abstract: At present, most of the winding fault detections of transformers use offline methods, which require the entire line to be powered off or after the transformer has been shut down due to a serious fault,… read more here.
Keywords: deformation; detection method; online detection; method ... See more keywords