A New Approach to the Analysis of Impulse Voltages and Gradients in Transformer Windings

Rabins, L.

doi:10.1109/aieepas.1959.4500660

Cited by 13 publications

(8 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the increased accuracy, the appropriate solution of the different physical fields leads to solve elliptic integrals, second order Bessel-functions etc. These partial differential equations can be solved by numerical methods in reasonable time and accuracy [1,[82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99][100][101].…”

Section: Analytical Cost Optimization Methodsmentioning

confidence: 99%

Evolution and Modern Approaches of the Power Transformer Cost Optimization Methods

Orosz

2019

Period. Polytech. Elec. Eng. Comp. Sci.

View full text Add to dashboard Cite

Transformer design is a challenging engineering task, where the different physical fields have to be harmonized together to fulfill the implied specifications. Due to the difficulty of this task, it can be separated into several subproblems. The first subproblem, in the pre-concept phase, during the transformer design is the calculation of the cost optimal key-design parameters, where not only the technical but also the economical parameters have to be considered, as well. This subproblem belongs to the most general branch of the non-linear mathematical optimization problems. This paper presents the main directions of the evolution and trends in the power transformer design. Main directions of the considered research and the future trends in the field of preliminary design transformer optimization methods are summarized.

show abstract

Section: Analytical Cost Optimization Methodsmentioning

confidence: 99%

Evolution and Modern Approaches of the Power Transformer Cost Optimization Methods

Orosz

2019

Period. Polytech. Elec. Eng. Comp. Sci.

View full text Add to dashboard Cite

show abstract

“…The starting point is the expansion of the vector potential of a line current (1) where is the distance from the source to the point at which A exists and is a constant term. For a single line current, approaches infinity but for a multiconductor system with zero net current, can be dropped from the equation and only the first term can be used to calculate the vector potential component produced by each conductor.…”

Section: A Calculation Of Vector Potentialmentioning

confidence: 99%

“…T HE DETAILED model of winding consisting of inductive, capacitive, and loss components has been used widely for the analysis of fast and very fast transients in transformers [1]- [15]. For very fast transients, such as those caused by switching operations in gas-insulated substations (GIS), using one segment per turn in order to achieve the required detail of the winding model [16] is needed.…”

mentioning

confidence: 99%

New Methods for Computation of the Inductance Matrix of Transformer Windings for Very Fast Transients Studies

Eslamian

Vahidi

2012

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

To study very fast transients in transformers, computing the winding inductance matrix at very high frequencies (MHz) is required. The air-core approximation formulas cannot be used for this purpose because at very high frequencies the core behaves as a magnetic insulating wall and so the distribution of the magnetic field is quite different from that of air-core inductors. This paper presents new analytical methods for computing the winding inductance matrix at very high frequencies considering the presence of the core. A simple method, based on numerical integration of the vector potential functions, is described for the calculation of inductance outside the core window. For the region inside the core window, two different analytical solutions are developed and inductance formulas are extracted. The final expressions are simple and fast convergent. Comparisons with finite-element method simulations prove the high accuracy of the technique.

show abstract

“…Transient over-voltages in transformers are commonly studied using an equivalent circuit of windings, which consists of inductive, capacitive, and loss components [1][2][3][4][5][6][7]. It has been agreed that fast transient over-voltages do exist and can cause damage on transformer windings.…”

Section: Introductionmentioning

confidence: 99%

Computation of Self-impedance and Mutual Impedance of Transformer Winding Considering the Frequency-dependent Losses of the Iron Core

Eslamian

Vahidi

2016

Electric Power Components and Systems

View full text Add to dashboard Cite

A New Approach to the Analysis of Impulse Voltages and Gradients in Transformer Windings

Cited by 13 publications

References 2 publications

Evolution and Modern Approaches of the Power Transformer Cost Optimization Methods

Evolution and Modern Approaches of the Power Transformer Cost Optimization Methods

New Methods for Computation of the Inductance Matrix of Transformer Windings for Very Fast Transients Studies

Computation of Self-impedance and Mutual Impedance of Transformer Winding Considering the Frequency-dependent Losses of the Iron Core

Contact Info

Product

Resources

About