Estimating power transformer high frequency model parameters using frequency response analysis
Frequency response analysis (FRA) has become a widely accepted technique by worldwide
utilities to detect winding and core deformations within power transformers. The main …
utilities to detect winding and core deformations within power transformers. The main …
Simulink model for PWM-supplied laminated magnetic cores including hysteresis, eddy-current, and excess losses
A new implementation of an iron-loss model for laminated magnetic cores in the
MATLAB/Simulink environment is proposed in this paper. The model is based on …
MATLAB/Simulink environment is proposed in this paper. The model is based on …
Reversible wideband hybrid model of two-winding transformer including the core nonlinearity and EMTP implementation
W Sima, D Peng, M Yang, P Sun… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
Accurate high-frequency modeling of transformers is crucial for the analysis and simulations
of the fast electromagnetic transients of power systems and smart grids. However, most high …
of the fast electromagnetic transients of power systems and smart grids. However, most high …
Modeling and analysis of a single-phase core-type transformer under inrush current and nonlinear load conditions
In this paper, a transformer model based on the equivalent electrical circuit considering the
nonlinearity of the iron core has been developed. The nonlinear behavior of the iron core …
nonlinearity of the iron core has been developed. The nonlinear behavior of the iron core …
Retrofitting the BCTRAN transformer model with nonlinear magnetizing branches for the accurate study of low-frequency deep saturating transients
In this paper, an extension to the multiwinding BCTRAN model is proposed for the study of
low-frequency saturating transients in single-phase transformers. The conventional …
low-frequency saturating transients in single-phase transformers. The conventional …
Measurement and FEM analysis of DC/GIC effects on transformer magnetization parameters
Topologically derived equivalent circuit models for transformers can be improved by more
accurate parameterization of the magnetization characteristics. We examined the changes in …
accurate parameterization of the magnetization characteristics. We examined the changes in …
Frequency considerations in GIC applications
L Trichtchenko - Space Weather, 2021 - Wiley Online Library
Geomagnetically induced currents (GIC) are a phenomenon well known for its negative
effects on the operations of power systems. To efficiently mitigate them requires different …
effects on the operations of power systems. To efficiently mitigate them requires different …
Improved flux-controlled VFCV strategy for eliminating and measuring the residual flux of three-phase transformers
The residual flux (RF) in three-phase transformers can dramatically increase the inrush
current when the transformer is energized. The RF can also severely interfere with …
current when the transformer is energized. The RF can also severely interfere with …
Distributed Dual Model for High-Frequency Transformer Windings: Electromagnetic Transients and Solid State Transformers
This paper presents a novel model for transformer windings to accurately represent the
duality between electrical and magnetic circuits. The model can be used for the calculation …
duality between electrical and magnetic circuits. The model can be used for the calculation …
Low-frequency electromagnetic transient modeling of shell-type transformers based on dynamic Jiles-Atherton hysteresis model
Y Ren, Y Wang, C Liu - IEEE Transactions on Magnetics, 2024 - ieeexplore.ieee.org
Transformers often encounter electromagnetic transients, such as ferromagnetic resonance
and inrush currents. An accurate low-frequency modeling of transformers is essential for …
and inrush currents. An accurate low-frequency modeling of transformers is essential for …