Computation of very fast transient overvoltages in transformer windings

Popov, Marjan; Sluis, L. van der; Paap, G.C.; Herdt, H De

doi:10.1109/tpwrd.2003.817738

Cited by 106 publications

(40 citation statements)

References 6 publications

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“…σ, μ and d are the conductivity, permeability and the winding coils gap respectively. The details of modeling and the parameters estimation for an inhomogeneous winding (realizing frequency dependent parameters) are discussed in [10].…”

Section: Mtl Modelmentioning

confidence: 99%

“…The published works on the machines is more focused on the RLC ladder network model in past [1][2][3][4][5][6]. While the published works on MTL modeling is mostly concentrated on modeling of electrical rotating machines and also on only the homogenous transformer windings ignoring the frequency dependency of the winding insulation parameters [7][8][9][10][11][12]. This paper compares the two well-known MTL and RLC ladder network models and used these models for PD studies in high frequency range 10kHz < f < 5MHz.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of High Frequency Detailed Generator Models for Partial Discharge Localization

Hosseini¹,

Bafghi²

2015

Journal of Electrical Engineering and Technology

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-This paper presents partial discharge localization in stator winding of generators using multi-conductor transmission line (MTL) and RLC ladder network models. The high-voltage (HV) winding of a 6kV/250kW generator has been modeled by MATLAB software. The simulation results of the MTL and the RLC ladder network models have been evaluated with the measurements results in the frequency domain by applying of the Pearson's correlation coefficients. Two PD generated calibrator signals in kHz and MHz frequency range were injected into different points of generator winding and the signals simulated/measured at the both ends of the winding. For partial discharge localization in stator winding of generators is necessary to calculate the frequency spectrum of the PD current signals and then estimate the poles of the system from the calculated frequency spectrum. Finally, the location of PD can be estimated. This theory applied for the above generator and the simulation/measured results show the good correlation for PD Location for RLC ladder network and MTL models in the frequency range of kHz (10kHz

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Section: Mtl Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of High Frequency Detailed Generator Models for Partial Discharge Localization

Hosseini¹,

Bafghi²

2015

Journal of Electrical Engineering and Technology

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“…Multi-transmission-line (MTL) model has been widely used to model large power transformer windings at high frequency or in a wide frequency range for the analysis of very fast transient overvoltage (VFTO) [1][2][3][4][5] , partial electromagnetic oscillation [6] and partial discharge [7] in the windings. However, there are still some problems to be solved when MTL model is used for large power transformer windings modeling on turn basis.…”

Section: Introductionmentioning

confidence: 99%

Wide band modeling of large power transformer windings for very fast transient overvoltage (VFTO) analysis

Yang

Zanji

2009

Sci. China Ser. E-Technol. Sci.

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Citation: Yang Y, Wang Z J. Wide band modeling of large power transformer windings for very fast transient overvoltage (VFTO) analysis.There are some difficulties in using multi-transmission-line (MTL) model for wide band modeling of whole windings of the large power transformer. In this paper, the normalized MTL model is firstly derived, with which not only the difficulty of modeling windings with different turn-lengths using MTL can be solved, but also the model can be extended to the modeling of the multi-winding transformer. Secondly, both MTL model and the lumped circuit model on turn basis are mathematically compared in validation of the frequency range and it is pointed out that the lumped circuit model on turn basis is generally valid below 2.5 MHz for EHV and UHV power transformers. Finally, based on the MTL equations, a novel lumped circuit model is derived and it is shown that the valid frequency range of the new circuit is extended to about 4 MHz for modeling large EHV and UHV power transformer windings.very fast transient, power transformer, wide band modeling, multi-transmission line, lumped circuit model

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“…So far there was significant research done on the investigation of transients in transformers [3][4][5][6][7][8]. In Refs.…”

Section: Introductionmentioning

confidence: 99%

“…[3,4], the lumped parameter analysis was used for transformer modelling, and [5,6] deal with the modelling of transformer based on the well-known Rabins method. It was also shown that transformer can be modelled by considering the windings or group of windings as transmission lines [7,8]. Furthermore, Wilcox et al [9] proposed a model that can be generally applied for multi-phase multi-winding transformers.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of surge-transferred overvoltages in distribution transformers

Popov

Sluis

Smeets

2008

Electric Power Systems Research

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Computation of very fast transient overvoltages in transformer windings

Abstract: The algorithm uses a modified continuous Fourier transformation that provides an accurate time domain computation. As an example, the interturn voltage distributions for two 500-kV autotransformers are computed and compared with measurements provided by other publications.

Cited by 106 publications

References 6 publications

Comparison of High Frequency Detailed Generator Models for Partial Discharge Localization

Comparison of High Frequency Detailed Generator Models for Partial Discharge Localization

Wide band modeling of large power transformer windings for very fast transient overvoltage (VFTO) analysis

Evaluation of surge-transferred overvoltages in distribution transformers

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