Energies, 2020 Frequency response analysis is widely used to diagnose transformer winding deformation faults due to its high sensitivity, strong anti-interference capability, and equipment portability, but the results of frequency response analysis can be affected by ...
Qian Wu, Ming Dong, Changjie Xia
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Comprehensive Analysis of Winding Electromagnetic Force and Deformation During No-Load Closing and Short-Circuiting of Power Transformers [PDF]
IEEE Access, 2021 When an electromagnetic transient occurs in a transformer, certain parts of the winding will be over stressed internally, which in severe cases will lead to the destruction of the winding insulation.
Chenchen Zhang +3 more
doaj +2 more sources
On the Feasibility of Localizing Transformer Winding Deformations Using Optical Sensing and Machine Learning [PDF]
PhotonicsMechanical vibrations induced by electromagnetic forces during transformer operation can lead to winding deformation or failure, an issue responsible for over 12% of all transformer faults.
Najmeh Seifaddini +6 more
doaj +2 more sources
The occurrence and mechanism of hysteresis between axial deformation and short‐circuit electromagnetic force during the vibration of power transformer windings [PDF]
IET Electric Power ApplicationsMechanical stability is one of the core capabilities of power transformers. External short‐circuit accidents are the main cause of winding instability. International Electrotechnical Commission 60076‐5 standard recommends a method to calculate the short ...
Mingkai Jin +5 more
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Transformer winding deformation diagnosis method based on dynamic time warping and multilayer perceptron [PDF]
Frontiers in Energy ResearchTo address the issues of strong subjectivity and difficulty in feature extraction that are inherent to traditional frequency response analysis methods used for diagnosing transformer winding deformation, an intelligent diagnostic method is proposed based
Guobin Wang +5 more
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Winding string condensation and noncommutative deformation of a spacelike singularity [PDF]
Physical Review D, 2006 16 pages, no figures, harvmac; references added; added a section of discussion on disk and cylinder ...
Jian-Huang She
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Study on Cumulative Effects of Mechanical Forces and Deformation in Power Transformer Windings [PDF]
EnergiesWinding damage is one of the most common and highly destructive faults in power transformers. To analyze the winding force and deformation under short-circuit conditions, this paper establishes a three-dimensional simulation model of a 220 kV oil ...
Chunyan Zang +5 more
doaj +2 more sources
Calculation of the electrodynamic forces causing deformation of the power transformer’s windings [PDF]
E3S Web of Conferences, 2019 This paper describes modified method to calculate electrodynamic forces causing deformation of the power transformer’s windings. This method takes into account the deformed shape of the winding. The new equations allow to get better accuracy.
Khrennikov A Yu, Aleksandrov N.M.
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Methodology to locate and quantify radial winding deformation in power transformers
High Voltage, 2017 Frequency response analysis (FRA) is a tool that can be used to detect changes within the structural geometry of a transformer. One application of FRA is to detect winding displacement after the transformer experiences an overcurrent event.
Steven D Mitchell, James S Welsh
exaly +3 more sources
SFRA, Detect of Winding Deformation in Power Transformer
International Journal of Innovative Technology and Exploring Engineering, 2020 The sweep frequency response analysis is extensively used technique for detect hidden fault and condition monitoring of power transformer. The operation is administered by supply a coffee voltage signal of varying frequencies to the transformer windings and measuring both the input and output signals.
B. Gopinath +4 more
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