Teaching short-circuit withstand test on power transformers to M.Sc. students and junior engineers using MATLAB-SIMULINK

2010 ◽  
Vol 20 (3) ◽  
pp. 484-492
Author(s):  
B. Vahidi ◽  
Smieee A. Agheli ◽  
S. Jazebi
Keyword(s):  
Short Circuit ◽  
Power Transformers ◽  
Matlab Simulink

scholarly journals Designing and Simulating Transformer Experiments under Dynamic Experiments

2021 ◽  
pp. 22-31
Author(s):  
Ramesh Kumar Patel ◽  
Madhu Upadhyay
Keyword(s):  
Short Circuit ◽  
Open Circuit ◽  
The Other ◽  
Power Transformers ◽  
Matlab Simulink ◽  
Parameter Calculation ◽  
Other Hand ◽  
Dynamic Experiments ◽  
Energy Provider

Enormous power transformers are the main gear for the power lattice. Their dependability not just influences the accessibility of power in the inventory region, yet in addition influences the monetary working of an energy provider. The primary goal of this work of the improvement of the transformer testing simulating model on the MATLAB/SIMULINK climate.The testing which depends on generator and grid of the transformer, as well as the related outcomes in SIMULINK, will be part of the conceptual stage. In addition, the technique will look into the effects of transformer validation in the method relying on grid on devices which are connected to the grids. According to the findings, neither source has an impact on the parameter calculation of Open Circuit and Short Circuit assessments. Realistic situations, on the other hand, would necessitate testing which relies on grid, which would enable a broader variety of transformers of different ratings to be evaluated with increased current capacity. The effect of a mistake on the grid can be quickly assessed by looking at the destination of the mistake, the period of the mistake, and any dips that may have took place.

scholarly journals Magneto-Thermo-Structural Analysis of Power Transformers under Inrush and Short Circuit Conditions

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3266
Author(s):  
Antonio Roniel Marques de Sousa ◽  
Marcus Vinicius Alves Nunes ◽  
Wellington da Silva Fonseca ◽  
Ramon Cristian Fernandes Araujo ◽  
Diorge de Souza Lima
Keyword(s):  
Structural Analysis ◽  
Electric Power ◽  
Short Circuit ◽  
Real Data ◽  
Short Circuit Current ◽  
Power Transformers ◽  
Inrush Current ◽  
Electric Power Supply ◽  
Axial Forces ◽  
Radial Forces

The main equipment responsible for connection and transmission of electric power from generating centers to consumers are power transformers. This type of equipment is subject to various types of faults that can affect its components, in some cases also compromising its operation and, consequently, the electric power supply. Thus, in this paper, electromagnetic, thermal, and structural analysis of power transformers was carried out with the objective of providing the operator with information on the ideal moment for performing predictive maintenance, avoiding unplanned shutdowns. For this, computational simulations were performed using the finite element method (FEM) and, from that, the different transformer operation ways, nominal currents, inrush current, and short-circuit current were analyzed. In this perspective, analyses of the effects that thermal expansion, axial forces, and radial forces exerted were carried out, contributing to possible defects in this type of equipment. As a study object, simulations were carried out on a 50 MVA single-phase transformer. It is important to emphasize that the simulations were validated with real data of measurements and with results presented in the current literature.

Analytical estimation of short circuit axial and radial forces on power transformers windings

2014 ◽  
Vol 8 (2) ◽  
pp. 250-260 ◽  
Author(s):  
Bashir Mahdi Ebrahimi ◽  
Saeed Saffari ◽  
Jawad Faiz ◽  
Alireza Fereidunian
Keyword(s):  
Short Circuit ◽  
Power Transformers ◽  
Analytical Estimation ◽  
Radial Forces

Magneto-Thermo-Structural Analysis of Power Transformers under Short Circuit Condition

2021 ◽  
Author(s):  
Antonio R. M. Sousa ◽  
Wellington Da S. Fonseca ◽  
Marcus V. A. Nunes ◽  
Ramon C. F. Araujo ◽  
Diorge de S. Lima
Keyword(s):  
Structural Analysis ◽  
Short Circuit ◽  
Power Transformers ◽  
Short Circuit Condition

scholarly journals On Simplified Calculations of Leakage Inductances of Power Transformers

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4952 ◽  
Author(s):  
Tadeusz Sobczyk ◽  
Marcin Jaraczewski
Keyword(s):  
Power Transformer ◽  
Short Circuit ◽  
Power Transformers ◽  
Stray Field ◽  
Good Representation ◽  
The Finite Element Method ◽  
Leakage Inductance ◽  
Leakage Flux ◽  
Calculation Results ◽  
Discrete Differential Operator

This paper deals with the problem of the leakage inductance calculations in power transformers. Commonly, the leakage flux in the air zone is represented by short-circuit inductance, which determines the short-circuit voltage, which is a very important factor for power transformers. That inductance is a good representation of the typical power transformer windings, but it is insufficient for multi-winding ones. This paper presents simple formulae for self- and mutual leakage inductance calculations for an arbitrary pair of windings. It follows from a simple 1D approach to analyzing the stray field using a discrete differential operator, and it was verified by the finite element method (FEM) calculation results.

scholarly journals Leakage Inductances of Transformers at Arbitrarily Located Windings

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6464
Author(s):  
Marcin Jaraczewski ◽  
Tadeusz Sobczyk
Keyword(s):  
Differential Operators ◽  
Short Circuit ◽  
The Self ◽  
Power Transformers ◽  
Stray Field ◽  
The Finite Element Method ◽  
Leakage Inductance ◽  
Leakage Flux ◽  
Partial Differential Operators ◽  
Internal Asymmetry

The article presents the calculation of the leakage inductance in power transformers. As a rule, the leakage flux in the transformer window is represented by the short-circuit inductance, which affects the short-circuit voltage, and this is a very important factor for power transformers. This inductance reflects the typical windings of power transformers well, but is insufficient for special transformers or in any case of the internal asymmetry of windings. This paper presents a methodology for calculations of the self- and mutual-leakage inductances for windings arbitrarily located in the air window. It is based on the 2D approach for analyzing the stray field in the air zone only, using discrete partial differential operators. That methodology is verified with the finite element method tested on real transformer data.

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