Surge phenomena in system of transmission line and transformer winding

Předota, Antonín; Benešová, Zdeňka; Koudela, Lukáš

doi:10.1109/elektro.2012.6225664

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…A succeeded comparison between MR and MSV is also presented in Ref. [3], as well as a study of the influence of the series resistance, Rs, which can be usually neglected.…”

Section: Theoretical Basismentioning

confidence: 99%

“…Since every power transformer is inherently vulnerable to incidence of lightning voltage surges, several studies regarding this fact and its effects have been published ever since transformer has been put in use [1]. In consequence, several numerical tools and software have been developed for modeling, studying and understanding this issue with different degrees of complexity [2,3]. On the other hand, no matter how complex the transformer design can be or how sophisticate is the computational tool, the analysis of the behavior of its windings under the incidence of a lightning voltage surge is often based upon concepts extracted from a classical study.…”

Section: Introduction mentioning

confidence: 99%

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Analytical Solution for Evaluation of Voltage Surge Distribution along Transformer Windings through the Method of Residues

Cabral¹,

Bertoli²

2014

JEPE

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Computer programs have definitely become indispensable for designing power transformer. Among several applications, computer programs are mostly used for electric field calculation and thus electrical insulation concerns. In consequence, studies based on analytical approach to basic studies of correlated problems have become even more important because they form the very basis of knowledge that is necessary to every transformer designer in view of taking all the advantages of computational analyses. On the other hand, one of the most important basic studies consists in the evaluation of voltage surge distribution along transformer windings for which the method of separation of variables has been extensively used thanks to some simplifying assumptions. With this aim, authors have developed and previously published works that show the applicability of an alternative and useful analytical method that is the method of the residues, which requires no simplification to be assumed. In this work, another important step is taken towards proofing the total applicability of this promising method that is through a practical problem. A comparison to the numerical method TLM (transmission line method) is also performed and concordance with TLM and experimental data confirms the proposal of the method of residues can be also applicable to several others problems of electromagnetism.

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“…A succeeded comparison between MR and MSV is also presented in Ref. [3], as well as a study of the influence of the series resistance, Rs, which can be usually neglected.…”

Section: Theoretical Basismentioning

confidence: 99%

Section: Introduction mentioning

confidence: 99%

Analytical Solution for Evaluation of Voltage Surge Distribution along Transformer Windings through the Method of Residues

Cabral¹,

Bertoli²

2014

JEPE

View full text Add to dashboard Cite

show abstract

“…Therefore, the results of the model are approximate due to the simplifications involved in the modelling. However, similarly simplified models with distributed parameters have been solved numerically in other studies [7].…”

Section: Simple Electrical Modelmentioning

confidence: 99%

Measurement of electrical polar symmetry in turbogenerator rotors

Ramírez-Niño¹,

Vázquez²

2012

Meas. Sci. Technol.

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This paper presents a measurement technique and an analysis of the electrical polar symmetry in turbogenerator rotors using the so-called recurrent pulse comparison with the injection of charge as the excitation source. The polar symmetry should be measured because it provides information that allows electrical insulation failures in the rotor winding to be detected. A simple electrical model for the rotor is introduced, and the technique for comparing the recurrent pulses is analysed in detail. The particular measurement instrumentation and the analysis of the results obtained in the time and frequency domains, including their relation to the rotor failures, are also described.

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Surge phenomena in system of transmission line and transformer winding

Cited by 2 publications

References 4 publications

Analytical Solution for Evaluation of Voltage Surge Distribution along Transformer Windings through the Method of Residues

Analytical Solution for Evaluation of Voltage Surge Distribution along Transformer Windings through the Method of Residues

Measurement of electrical polar symmetry in turbogenerator rotors

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