Wideband Transformer Modeling Including Core Nonlinear Effects

Gustavsen, Bjørn

doi:10.1109/tpwrd.2015.2440446

Cited by 28 publications

(9 citation statements)

References 29 publications

(37 reference statements)

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“…Therefore, different black-box models need to be produced for different situations. The alternative is to merge two separate methods with special schemes such as filters [4]. Nevertheless, these models have been generally applied for mid-and highfrequency applications, and are not popular for the purpose of representation of low-frequency transients.…”

Section: A Black-boxmentioning

confidence: 99%

Duality-Derived Transformer Models for Low-Frequency Electromagnetic Transients—Part II: Complementary Modeling Guidelines

Jazebi

Rezaei-Zare

Lambert

et al. 2016

IEEE Trans. Power Delivery

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This two-part paper is intended to clarify definitions in dual transformer modeling that are vague, provide accurate modeling guidelines, clarify misconceptions about numerical instability, provide a unified dual model for a specific type of transformer, and introduce new paths of research to the power systems/electrical machinery community for low-frequency transients. Part I discussed the topology of duality-based models and some important issues, such as the most common approaches to derive dual models and their variety, the equivalence of negative inductance and mutual couplings to represent the leakage inductance of three-winding transformers, and the numerical oscillations caused by the use of nontopological models. This part of the paper discusses and compares white-, gray-, and black-box models. The paper also reviews hysteresis models (static and dynamic) and highlights the differences between the air-core inductance and saturation inductance. The available dual models for the representation of the transformer tank are then presented. A unified and accurate model of a three-phase core-type transformer adequate for all lowfrequency transients is presented. Finally, concrete guidelines are

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Section: A Black-boxmentioning

confidence: 99%

Duality-Derived Transformer Models for Low-Frequency Electromagnetic Transients—Part II: Complementary Modeling Guidelines

Jazebi

Rezaei-Zare

Lambert

et al. 2016

IEEE Trans. Power Delivery

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“…An alternative method is black-box modeling, which can be implemented for both time domain and frequency domain analyses [54,55]. For this model, no prior knowledge about the system or the characteristics of the physical arrangement is used [45].…”

Section: Power Transformersmentioning

confidence: 99%

A Comprehensive Review on Transient Recovery Voltage in Power Systems: Models, Standardizations and Analysis

Lazzari,

de Morais,

Ramos

et al. 2023

Energies

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Electrical power systems are exposed to transient disturbances that change the voltage and current signals of the network, which can interrupt power and damage equipment. In high-frequency phenomena, it is essential to study the transient recovery voltage (TRV) to ensure the electrical insulation limits of circuit breakers are not violated, thus leading to a safe and reliable operation. Adequate models are crucial to achieving satisfactory results in the studies, according to the range of frequency of the transient being evaluated. This paper presents a comprehensive literature review of methods and models for studying electromagnetic transients, focusing on TRV requests imposed on circuit breakers, in addition to fault-clearing simulations on real system modeling. The analyses are fundamental both for the evaluation of the amplitude of the voltage signal and for its rate of rise. We also compare the reviewed models and techniques to provide a handy resource for researchers.

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“…The main source of transformation errors of an inductive CT is the excitation current of the magnetic core. It should be emphasized that due to the non-linear shape of the magnetizing characteristic of the magnetic core, the transformation accuracy of the inductive CT depends on the value of the magnetic flux density and thus on the RMS values of the primary current harmonics and the load on the secondary winding [1], [3], [4], [19], [23]. The paper [5] presents analyses on the transformation accuracy of inductive CTs under real operating conditions in a distribution grid.…”

Section: Introductionmentioning

confidence: 99%

The Influence of the 3rd Harmonic of the Distorted Primary Current on the Self-Generation of the Inductive Current Transformers

Kaczmarek

Stano

2022

IEEE Access

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This paper investigates for transformation of the distorted current the low order higher harmonic self-generation phenomenon of tested inductive current transformers. The influence of the main component and the 3rd harmonic of the distorted primary current on the RMS values of the 5th, 7th and 9th order self-generated higher harmonics is analyzed. This research indicate that the change of the RMS value of the 3rd harmonic of the distorted primary current causes variation of the lower order higher harmonics generated in to the secondary current. Therefore, this is a challenging phenomenon which have to be considered while compensating the values of current error and phase displacement of the inductive CTs during transformation of the distorted currents.INDEX TERMS self-generation, distorted primary current, inductive current transformer, low order higher harmonics, current error, phase displacement.

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Wideband Transformer Modeling Including Core Nonlinear Effects

Cited by 28 publications

References 29 publications

Duality-Derived Transformer Models for Low-Frequency Electromagnetic Transients—Part II: Complementary Modeling Guidelines

Duality-Derived Transformer Models for Low-Frequency Electromagnetic Transients—Part II: Complementary Modeling Guidelines

A Comprehensive Review on Transient Recovery Voltage in Power Systems: Models, Standardizations and Analysis

The Influence of the 3rd Harmonic of the Distorted Primary Current on the Self-Generation of the Inductive Current Transformers

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