Frequency Response of Two-Winding Transformers Obtained by a Distributed-Parameter<i>s</i>-Domain Method

Saied, M.M.; Al-Fuhaid, A.S.

doi:10.1080/15325000490466690

Cited by 7 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…El estudio y comportamiento de los sobrevoltajes transitorios en el transformador han sido tópicos de gran interés e importancia en el área de ingeniería de potencia (Al-fuhaid, 2001), (Saied & Al-fuhaid, 1985), (Saied & Al-fuhaid, 2004), (Liang, Sun, Zhang, & Cui, 2006), (Shibuya, Fijita, & Hosokawa, 1997), (Dang & Ridriguez , 1999), (Honorati & Santini, 1990). Para el análisis de transitorios de altas frecuencias, generados tanto por descargas atmosféricas como por maniobras o fallas, se emplean modelos denominados internos, los cuales describen principalmente la distribución del potencial y la propagación en el devanado primario.…”

Section: Introductionunclassified

Modelo del transformador monofásico en el dominio de la frecuencia

Escamilla-Sánchez¹,

Morales-Aguilar²,

Candia-García³

et al. 2020

JEA

View full text Add to dashboard Cite

This article presents a model in the frequency domain for the analysis of the transient induced overvoltage transfer to the secondary of a single-phase transformer, as well as the distribution of the transient voltage along both windings. The transformer is modeled as an element of distributed parameters from the telegraphist's equations in the frequency domain. The Laplace Numerical Transform (TNL) is used to obtain the solution in the time domain.

show abstract

Section: Introductionunclassified

Modelo del transformador monofásico en el dominio de la frecuencia

Escamilla-Sánchez¹,

Morales-Aguilar²,

Candia-García³

et al. 2020

JEA

View full text Add to dashboard Cite

show abstract

“…As an example of distributed-parameter s-domain method, in literature [9], a new mathematical-based method is developed. The results are swept along high frequencies.…”

Section: Introductionmentioning

confidence: 99%

Investigating short-circuit in power transformer winding with quasi-static finite element analysis and circuit-based model

2010

View full text Add to dashboard Cite

Detecting and removing minor faults in power transformer winding is essential because minor faults may develop and lead to major faults and finally irretrievable damages occur. In this paper in order to detect the position of short-circuit in the winding, frequency response of the input impedance of a power transformer is analyzed. Common shortcircuits are categorized and the results are compared, then the behavior of frequency response due to disk-disk short-circuit is investigated. To increase the accuracy of analysis, innovative approach in finite element analysis is offered. This approach termed Electromagnetic quasi-static considers both magnetic and electric characteristics of power transformer. Simulation is fulfilled by interconnecting between finite element analysis and circuit-based model for employing short-circuit.Index Terms-circuit-based model, fault, finite element analysis, power transformer, quasi static, sweep frequency response analysis,

show abstract

“…This paper is a further step in this direction. First, it will refine the transformer model through the use of a distributed‐parameters s ‐domain Laplace representation (Saied, 1995; Saied and Alfuhaid, 2004). The resulting closed‐form expression will enable the model application to any number of winding discs, without resorting to the complicated circuit manipulations involved in concentrated‐element analysis nor the application of circuit analysis software such as SPICE.…”

Section: Introductionmentioning

confidence: 99%

Recognition of power transformer winding movement and deformation using FRA

Saied

Al-Shaher

2007

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

View full text Add to dashboard Cite

PurposeThe purpose of this paper is to present a frequency domain technique for the recognition and location of winding movements and mechanical deformations in power transformers. Both, axial and radial coil movements, as well as changes in clamp pressure will be studied.Design/methodology/approachThe developed algorithm is based on using a distributed s‐domain parameter equivalent network, which is cascaded with other sections to constitute a generalized model. The frequency domain transfer admittance is used as the main criterion to recognize, identify and locate the winding movement and deformation.FindingsIn order to reduce the number of failures due to winding movements and deformations, it is suggested to measure and store the transfer admittance over frequency range 0‐10 MHz region at normal operation as saved data for comparison with the corresponding data during failure. With the proposed technique, the type and the location of eventual displacement, as well as the number discs involved can be identified.Research limitations/implicationsAlthough the simulation was based on real experimental data adopted from the literature, the algorithm should be tested for real transformers. Several checks have been conducted in order to validate the mathematical model.Originality/valueA relatively simple mathematical model has been presented. It can be used for any transformer, to check the integrity of the winding in order to meet certain degree of equipment safety and reliability.

show abstract

Frequency Response of Two-Winding Transformers Obtained by a Distributed-Parameters-Domain Method

Cited by 7 publications

References 0 publications

Modelo del transformador monofásico en el dominio de la frecuencia

Modelo del transformador monofásico en el dominio de la frecuencia

Investigating short-circuit in power transformer winding with quasi-static finite element analysis and circuit-based model

Recognition of power transformer winding movement and deformation using FRA

Contact Info

Product

Resources

About