Capacitive-resistive field calculation on HV bushings using the boundary-element method

Chakravorti, S.; Steinbigler, H.

doi:10.1109/94.671944

Cited by 24 publications

(4 citation statements)

References 7 publications

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“…In addition, for optimum utilization of the dielectric, it is recommended that the capacitive grading be arranged so that the same partial voltage is across two adjacent layers [12]. To meet this condition, similar to radial electrical stress, the objective function includes two terms for representing voltage drop on each layer.…”

Section: Mathematical Model Of the Problemmentioning

confidence: 99%

An Advanced Optimal Approach for High Voltage AC Bushing Design

Hesamzadeh

Hosseinzadeh

Wolfs

2008

IEEE Trans. Dielect. Electr. Insul.

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This paper proposes a new and advanced methodology for finding the optimum electrical design of high voltage ac capacitive graded bushings using an improved genetic algorithm approach as an effective meta-heuristic method. A case study has been conducted on a 145 kV oil impregnated paper (OIP) bushing and the IEC 60137 tests have been performed to evaluate its performance. Condenser-bushings contain concentric conductive foils which are isolated from each other. The partial capacitances between conducting cylinders can be modified by adjusting the number, diameter, place and length of these cylinders as well as the thickness of insulating material between foils. As a result, the voltage drop and also the electrical stress in the core and along the surface will change. This paper finds optimal value of bushing design parameters to achieve well-distributed electric stress with the lowest possible maximum value and also a constant voltage drop for different layers by using an improved genetic algorithm optimization method subject to practical and technological constrains. The proposed method of this research work has been applied to a 145 kV OIP bushing. The performance of optimal designed 145 kV OIP bushing under IEC 60137 tests is very promising.

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Section: Mathematical Model Of the Problemmentioning

confidence: 99%

An Advanced Optimal Approach for High Voltage AC Bushing Design

Hesamzadeh

Hosseinzadeh

Wolfs

2008

IEEE Trans. Dielect. Electr. Insul.

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“…For both the arrangements, the ground electrode is maintained at zero potential. Both the electrode and the insulator have been simulated by BEM [19][20][21][22] with curvilinear triangles. Minimizing the surface area optimizes the electrode dimensions.…”

Section: Application Examplesmentioning

confidence: 99%

Optimization of support insulators used in HV systems using support vector machine

Banerjee¹,

Lahiri²,

Bhattacharya

2007

IEEE Trans. Dielect. Electr. Insul.

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In this paper support vector machine (SVM) has been used for optimization of electric field along the support insulators used in high voltage (HV) systems. To illustrate the effectiveness of SVM in optimizing electric field problems, two axi-symmetric cases have been considered one having an insulator with a contour that is quarter ellipse and the second one having a porcelain core solid insulator. The training and the test data for the SVM have been prepared by electrostatic field computation using indirect boundary element method (BEM). It is observed that once the SVM is trained it is able to give results with mean absolute error of less than 1.5 % when compared with the analytically obtained results. The SVM designed for insulator contour optimization is first trained with the results obtained from electric field computation for some predetermined contours of the arrangements under consideration. Then the trained SVM is used to produce an optimized insulator contour in such a way that the desired stress distribution can be obtained on the insulator surface. The results obtained from the present study show that the trained SVM is adequately efficient to optimize insulator contours in order to have the desired stress distribution along the insulator surface. He has published several research papers both at international and national levels. His current areas of research are numerical computation of electrostatic field, computer-aided design and optimization of high voltage systems by using soft-computing techniques.

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“…Numerical simulation tools based on discretizations of Maxwell's equations are established in academia and industry. They support engineers during the design and analysis of products like electric surge arresters or high voltage devices [1,2]. They are particularly popular when designing complex geometries that cannot be analyzed in closed-form or by simple electric circuit models.…”

Section: Introductionmentioning

confidence: 99%

A Spline-based Partial Element Equivalent Circuit Method for Electrostatics

Torchio¹,

Nolte²,

Schöps³

et al. 2022

Preprint

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This contribution investigates the connection between Isogeometric Analysis (IgA) and the Partial Element Equivalent Circuit (PEEC) method for electrostatic problems. We demonstrate that using the spline-based geometry concepts from IgA allows for extracting circuit elements without a meshing step. Moreover, the proposed IgA-PEEC method converges for complex geometries up to three times faster than the conventional PEEC approach and, in turn, it requires a significantly lower number of degrees of freedom to solve a problem with comparable accuracy. The resulting method is closely related to the isogeometric boundary element method. However, it uses lowest-order basis functions to allow for straightforward physical and circuit interpretations. The findings are validated by an analytical example with complex geometry, i.e., significant curvature, and by a realistic model of a surge arrester.

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Capacitive-resistive field calculation on HV bushings using the boundary-element method

Cited by 24 publications

References 7 publications

An Advanced Optimal Approach for High Voltage AC Bushing Design

An Advanced Optimal Approach for High Voltage AC Bushing Design

Optimization of support insulators used in HV systems using support vector machine

A Spline-based Partial Element Equivalent Circuit Method for Electrostatics

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