Proceedings ArticleDOI
On the use of concurrent high frequency excitation during a short circuit test in a power transformer
S Gopalalkrishna,Jayaraj Joseph,V. Jayashankar +2 more
- pp 1258-1261
Reads0
Chats0
TLDR
In this article, a ''benchmark'' layer winding is used to validate the use of high frequency excitation and axial displacement, compression and buckling of the winding are simulated and the changes are identified.Abstract:
The short circuit test is a special test for proving the mechanical integrity of a power transformer. Conventionally a change in reactance exceeding 2% after the test is an indication of failure. Concurrent high frequency excitation is shown to be more sensitive method for detecting winding deformation. A `benchmark' layer winding is used to validate the use of high frequency excitation. Axial displacement, compression and buckling of the winding are simulated and the changes are identified. It is clearly established that for all these changes high frequency excitation is more sensitive.read more
Citations
More filters
Book ChapterDOI
Model Based Approach for Fault Detection in Power Transformers Using Particle Swarm Intelligence
M. Arivamudhan,S. Santhi +1 more
TL;DR: This paper aims at determination of distributed parameters of the lumped element model of a transformer winding using particle swarm intelligence to determine the simulated frequency response and experimental frequency response.
Proceedings ArticleDOI
Optimal high frequency model for analysis of winding deformation in power transformers
TL;DR: In this article, a comparative study is made between models with different number of sections to obtain an optimal model for the high frequency behavior of power transformer, a lumped parameter equivalent circuit with multiple sections is widely used.
Dissertation
Detection of winding deformation in power transformers
TL;DR: In this paper, a winding is modeled using finite element method (FEM) based software and parameters such as capacitance and inductance are calculated for 10 section healthy coil using these parameter values, SFRA plots are obtained which are a set of reference for deformation analysis.
References
More filters
Book
Inductance Calculations: Working Formulas and Tables
TL;DR: This authoritative compilation of formulas and tables simplifies the design of inductors for electrical engineers features a single simple formula for virtually every type of inductor, together with tables from which essential numerical factors may be interpolated.
Book
Transformer Engineering: Design and Practice
S.V. Kulkarni,S.A. Khaparde +1 more
TL;DR: In this article, a reference illustrates the interaction and operation of transformer and system components and spans more than two decades of technological advancement to provide an updated perspective on the increasing demands and requirements of the modern transformer industry.
Journal ArticleDOI
A general method for determining resonances in transformer windings
TL;DR: In this article, the authors present a method for calculating terminal and internal impedance versus frequency for a lumped parameter model of a transformer, where the transformer's total frequency response can be accurately determined from this impedance data directly, i.e., the terminal resonance and anti-resonance and internal amplification factor characteristic can be calculated for a single or three-phase transformer model.
Journal ArticleDOI
Real-Time Techniques to Measure Winding Displacement in Transformers During Short-Circuit Tests
TL;DR: In this article, the authors propose new techniques for fault detection based on continual assessment during the test. They include voltage comparison, current comparison, and real/reactive power measurements, which are validated on a number of models including a voltage transformer and a distribution transformer winding.
Journal ArticleDOI
Continual Assessment of Winding Deformation during a Short Circuit Test
S. Santhi,V. Jayashankar +1 more
TL;DR: In this paper, a new approach for the continual assessment of winding deformation during short circuit test is proposed, which is validated through FEM analysis of axially unbalanced axisymmetric configurations.
Related Papers (5)
Partial discharge signal propagation characteristics inside the winding of oil-immersed power transformer using the equivalent circuit of winding model in the oil
S. Okabe,G. Ueta,Haruhisa Wada +2 more
In-situ calibration of high voltage three-phase transformer loss measuring systems
Eddy So,E. Hanique +1 more