Computation of Eddy Currents, Shielding and Transient Forces in Power System Equipment by the Method of Images

Tuohy, E. J.

doi:10.1109/tpas.1971.292928

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…In most cases, the worst condition occurs when a three-phase short circuit happens (Skeats & Swerdlow, 1963). The transient three-phase short circuit current in each phase conductor is generally expressed as (Tuohy, 1971)…”

Section: Finite-element Analysismentioning

confidence: 99%

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Transient Finite-Element Analysis of Short-Circuit Electromagnetic Forces in Isolated Phase Buses

Isfahani

Vaez‐Zadeh

2008

Electromagnetics

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Short-circuit electromagnetic forces have a vital role in the mechanical design of isolated phase buses. Electromagnetic forces in isolated phase buses under short-circuit conditions are analyzed in this article. These forces are calculated using the time-stepping finite-element method. The effects of system dimensions and material properties on the maximum value of forces and the time of its occurrence are investigated through extensive simulation. The concluding remarks are useful for the design and protection of the buses.

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Section: Finite-element Analysismentioning

confidence: 99%

“…Also, using the scale model rather than the real model may lead to inaccurate results. The imaging method has been applied to calculate the forces on IPBs in some research (Tuohy, 1971;Hama et al, 1987;Parniani & Naderian Jahromi, 1998.…”

Section: Introductionmentioning

confidence: 99%

Transient Finite-Element Analysis of Short-Circuit Electromagnetic Forces in Isolated Phase Buses

Isfahani

Vaez‐Zadeh

2008

Electromagnetics

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“…The short circuit forces of busbars with multiple sub-conductors are calculated based on a correction factor method in [16]. The method of images is a well-known technique which has many applications in electromagnetics and has been widely used in different studies [2], [7], [18], [21]- [23]. Specially, this method can be used for the calculation of different field parameters in power transformers, e.g.…”

Section: Introductionmentioning

confidence: 99%

An algorithm for fast calculation of short circuit forces in high current busbars of electric arc furnace transformers based on method of images

Moghaddami

Moghadasi

Sarwat

2016

Electric Power Systems Research

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This paper proposes an algorithm for the calculation of short circuit forces on the high current busbars of electric arc furnace (EAF) transformers based on the method of images using an analytical solution for the electromagnetic force between two adjacent current carrying rectangular conductor. The theory of images is used to account for the impact of the tank walls on the short circuit forces on the busbars. The proposed method uses an iterative algorithm and increases the number of image layers to achieve the desired accuracy. A 30 MVA EAF transformer is investigated as a case study and the results are compared to 2D finite element analysis (FEA). ANSYS software is used for the FEA. The proposed algorithm converges very fast, so that only in its first iteration, the convergence error is less than 0.2%. The comparisons show that the short circuit force calculations using the proposed method, conform to the 2D FEA results. However, the short-circuit calculation time using the proposed method is about 20 times faster than the 2D FEA with the same relative error. Therefore it can be used as a faster alternative for the FEA. The proposed method is characterized by fast convergence, simple calculations and high precision.

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“…Also, using the scaled model rather than the real model may lead to inaccurate results. Imaging method has been applied to calculate the forces on IPBs in many researches [10][11][12][13]. However, this method cannot consider the distribution of eddy currents and may cause erroneous results at large currents [1].…”

Section: Introductionmentioning

confidence: 99%

Accurate Determination of Electromagnetic Forces in Isolated Phase Buses under Short Circuit Conditions

Isfahani

Vaez‐Zadeh

2007

2007 IEEE Power Engineering Society General Meeting

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Short circuit electromagnetic forces have vital role in the design of isolated phase buses. Therefore, accurate determination of these forces is needed. In this paper these forces as well as eddy currents and magnetic fields are calculated using finite element method. A program is then developed to find the worst conditions at which maximum short circuit electromagnetic forces occur. The results are discussed and conclusions are drawn for design purposes.Index Terms--Isolated phase bus, Electromagnetic force, Magnetic field, Finite element method.

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Computation of Eddy Currents, Shielding and Transient Forces in Power System Equipment by the Method of Images

Cited by 9 publications

References 5 publications

Transient Finite-Element Analysis of Short-Circuit Electromagnetic Forces in Isolated Phase Buses

Transient Finite-Element Analysis of Short-Circuit Electromagnetic Forces in Isolated Phase Buses

An algorithm for fast calculation of short circuit forces in high current busbars of electric arc furnace transformers based on method of images

Accurate Determination of Electromagnetic Forces in Isolated Phase Buses under Short Circuit Conditions

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