Semianalytic Solution for a Simple Model of Inrush Currents in Transformers

Vanti, Marcelo G.; Bertoli, Sávio Leandro; Cabral, Sergio H. L.; Gerent, Antônio G.; Kuo, Pei-Xuan

doi:10.1109/tmag.2007.916245

Cited by 30 publications

(22 citation statements)

References 1 publication

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“…Many procedures for calculating the transitional EI regimes of power transformers do not account for these factors in their entirety. This is characteristic of the studies with analytical solutions for magnetic fluxes and inrush currents of the unloaded transformer [6,7], for the harmonic spectrum of inrush current when the voltage signal is distorted [8]. Authors of [9,10] propose an analytical description of the starting current surges of a power transformer using the theory of Giles-Atherton for hysteresis properties of electrical steel.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…We can confine ourselves, for the first period of the transition process, to two basis Gaussian functions in series (7) and reduce the number of regression coefficients to six. This considerably simplifies the calculation and ensures high accuracy of approximation because its error does not exceed 1.8 %.…”

Section: Fig 2 Magnetic Field During Test Of the Transformer In Thementioning

confidence: 99%

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Analysis of inrush currents of the unloaded transformer using the circuitfield modelling methods

Yarymbash

Kotsur

et al. 2018

EEJET

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Fig 2 Magnetic Field During Test Of the Transformer In Thementioning

confidence: 99%

Analysis of inrush currents of the unloaded transformer using the circuitfield modelling methods

Yarymbash

Kotsur

et al. 2018

EEJET

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“…Due to its generation principle it is being also known as magnetizing inrush current [14][15][16]. Relying on the circuit model of the ferromagnetic coils, their time domain transient state characterization is performed.…”

Section: Introductionmentioning

confidence: 99%

Magnetising inrush current of low-voltage iron core three phase power reactors

Cazacu

Petrescu

2014

2014 16th International Conference on Harmonics and Quality of Power (ICHQP)

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The paper presents the quantitative evaluation of the magnetizing inrush current initiated at the connection instant of various three phase iron core reactors to a low-voltage power network. An analytical approach is adopted, which bases on the ferromagnetic coils circuit model and its time domain transient characterization. Thus, the solutions of the corresponding nonlinear differential equation system allow extracting the main inrush current features: waveform signature, amplitude and duration. The major power quality issues generated by the three phase reactors energizing process are also investigated and additionally some inrush current mitigation techniques are suggested.

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“…The TMIC is an inrush current caused by a nonlinearity of transformer core. Intensity of the inrush current depends on the instance of the sinusoidal voltage in which it is switched on as well as on characteristics of the ferromagnetic core such as its residual magnetism and its magnetization curve [4]. Therefore, it is not classified as a fault of power system.…”

Section: Introductionmentioning

confidence: 99%

Method to Prevent the Malfunction Caused by the Transformer Magnetizing Inrush Current using IEC 61850-based IEDs and Dynamic Performance Test using RTDS Test-bed

Kang¹,

Song²,

Kim³

et al. 2014

Journal of Electrical Engineering and Technology

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-The digital substations are being built based on the IEC 61850 network. The cooperation and protection of power system are becoming more intelligent and reliable in the environment of digital substation. This paper proposes a novel method to prevent the malfunction caused by the Transformer Magnetizing Inrush Current(TMIC) using the IEC 61850 based data sharing between the IEDs. To protect a main transformer, the current differential protection(87T) and over-current protection(50/51) are used generally. The 87T IED applies to the second harmonic blocking method to prevent the malfunction caused by the TMIC. However, the 50/51 IED may malfunction caused by the TMIC. To solve that problem, the proposed method uses a GOOSE inter-lock signal between two IEDs. The 87T IED transmits a blocking GOOSE signal to the 50/51 IED, when the TMIC is detected. The proposed method can make a cooperation of digital substation protection system more intelligent. To verify the performance of proposed method, this paper performs the real time test using the RTDS (Real Time Digital Simulator) test-bed. Using the RTDS, the power system transients are simulated, and the TMIC is generated. The performance of proposed method is verified in real-time using that actual current signals. The reaction of simulated power system responding to the operation of IEDs can be also confirmed.

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Semianalytic Solution for a Simple Model of Inrush Currents in Transformers

Cited by 30 publications

References 1 publication

Analysis of inrush currents of the unloaded transformer using the circuitfield modelling methods

Analysis of inrush currents of the unloaded transformer using the circuitfield modelling methods

Magnetising inrush current of low-voltage iron core three phase power reactors

Method to Prevent the Malfunction Caused by the Transformer Magnetizing Inrush Current using IEC 61850-based IEDs and Dynamic Performance Test using RTDS Test-bed

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Semianalytic Solution for a Simple Model of Inrush Currents in Transformers

Cited by 30 publications

References 1 publication

Analysis of inrush currents of the unloaded transformer using the circuit­field modelling methods

Analysis of inrush currents of the unloaded transformer using the circuit­field modelling methods

Magnetising inrush current of low-voltage iron core three phase power reactors

Method to Prevent the Malfunction Caused by the Transformer Magnetizing Inrush Current using IEC 61850-based IEDs and Dynamic Performance Test using RTDS Test-bed

Contact Info

Product

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Analysis of inrush currents of the unloaded transformer using the circuitfield modelling methods

Analysis of inrush currents of the unloaded transformer using the circuitfield modelling methods