Proceedings ArticleDOI
Research on calculating leakage inductance of power transformer and its application to winding deformation analysis
Peng Li,Guoqiang Huang,Liqiang Xie,Xiaojing Hu +3 more
- pp 1-7
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TLDR
In this article, the leakage inductance parameters of a power transformer are calculated by energy method depending on the relationship that the value of leakage induction relies on dimensions and positions of transformer windings.Abstract:
Transformers are required to demonstrate the operative ability by analysis of electromagnetic characteristic and parameters calculation, and it is difficult to describe the winding deformation quantitatively. Based on finite element method (FEM), the model comprising iron-core and windings is shown. In this paper, the electromagnetic characteristic is analyzed by coupled field-circuit, and the leakage inductance parameters of power transformer are calculated by energy method. Depending on the relationship that the value of leakage inductance relies on dimensions and positions of transformer windings, the simulation models of different deformation are described by changing winding physical dimension and the values of leakage inductance in these conditions are presented by the software ANSYS. The test results of ANSYS simulation indicate that the accuracy of proposed algorithms is high and the change of parameter can successfully detect if and how the windings have occurred deformation.read more
Citations
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Proceedings ArticleDOI
Research on the deformation of transformer windings based on the analysis of short circuit reactance
Yu-sheng Quan,Jiang Shan,Li Wei +2 more
TL;DR: The finite element method is introduced to calculate the transformer short-circuit reactance in a model of power transformers established by using software ANSYS, and transformer reactance parameters are calculated.
Journal ArticleDOI
Analysis of electromagnetic characteristics of the main transformer caused by pantograph-catenary disconnection in high speed train
TL;DR: In this paper, a coupled finite element model of a pantograph-catenary system and a 3D coupled field-circuit model of the main transformer have been set up to analyse the current harmonic, electromagnetic field characteristics and leakage inductance which all cause by DC magnetic bias.
Proceedings ArticleDOI
Sensitivity of Leakage Inductance for Detecting Winding Movements in Transformers
TL;DR: It was found that leakage inductance is affected by large movements in the axial direction while it was found to be practically insensitive to small axial movements, which indicates that asymmetry introduced by the movement of windings makes a transformer vulnerable to short-circuit forces and therefore diagnosing the severity of such movements is crucial.
Proceedings ArticleDOI
Research on The Problem of Magnetic saturation controllable reactor Operating Characteristic
Zhen An,Baodong Bai,Dezhi Chen +2 more
TL;DR: In this article, the main work is focused on the study of the magnetic saturation controllable reactor operating characteristics, where the authors used finite element analysis to build the model of a 10kV magnetic-saturation-controlled nuclear reactor, then compared with the experimental values calculated control characteristics, volt-ampere characteristic and harmonic characteristics in simulation.
References
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Journal ArticleDOI
Transformer Diagnostic Testing by Frequuency Response Analysis
E.P. Dick,C.C. Erven +1 more
TL;DR: In this article, a frequency response analysis (FRA) method was used to measure wind deformation in power transformers, and the results indicated that benchmark reference data was not always necessary to identify certain kinds of mechanical damage.
Journal ArticleDOI
Monitoring of power transformers using the transfer function method
Thomas Leibfried,K. Feser +1 more
TL;DR: The transfer function concept is well known as an additional method of evaluating the impulse test of power transformers in the test laboratory and another application for this method is monitoring of power transformer in service as discussed by the authors.
Journal ArticleDOI
Diagnosis of the state of power transformer windings by on-line measurement of stray reactance
TL;DR: In this paper, a strategy for online diagnosis of the state of the windings in power transformers is discussed, which enables a diagnostic system to be set up that provides indications of conductor insulation reliability, recommending shutdown when necessary.
Journal ArticleDOI
Instrumentation Techniques for Low Voltage Impulse Testing of Power Transformers
TL;DR: In this paper, the authors presented instrumentation ion techniques for the Low Voltage Impulse method of detecting physical internal changes in transformers and the potential use of the method for locating that movement is also discussed.
Proceedings ArticleDOI
On-line monitoring of electrodynamic effects on power transformers windings
TL;DR: In this paper, a measurement technique for determining the online variations of stray reactance of transformers due to short-circuit events is reported, which makes possible the setting up a diagnostic system that provides useful indications of conductor insulation reliability.