Electrical insulation of high voltage inductor with co-axial electrode at floating voltage

Aracil, Jaime Cabanes; Lopez-Roldan, J.; Coetzee, Jacob; Tang, Tao; Darmann, F.

doi:10.1109/tdei.2014.6832248

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…Sensitivity analysis has long been a critical topic in produced high voltage systems. Many times, the quality control process is dependent on measurements of components and assemblies to evaluate whether they meet current standards [18,19]. Recently, industry has grown increasingly interested in tolerance-related factors, even during the product design process.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis Based New Numerical Approach with Green Function for Optimization

Topaloglu

2023

J. Electr. Eng. Technol.

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In this study, sensitivity analysis based on a new numerical approach is developed for the three-dimensional structural optimization of high voltage system devices. It has been developed using Green’s theorem in a closed form to satisfy all boundary conditions and necessary conditions, including material and geometric dimensions. The developed sensitivity function and objective function are suitable for structural optimization of all electrostatic problems. The suitability and application of the developed function were made on the bushing. The changing geometry information was obtained from the developed sensitivity function as a result of the optimization. The analysis made with the classical design and the developed function were compared with each other. Optimization with the developed function has provided insulation and conductor size reduction. Experimental test devices before and after optimization process produced and tested. These results are presented in the study.

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Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis Based New Numerical Approach with Green Function for Optimization

Topaloglu

2023

J. Electr. Eng. Technol.

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“…In electrostatic simulations, a perfect conductor is used to approximate a metallic body with a very high conductivity and its surface is assumed to be equipotential. Furthermore, in many applications these conductors are isolated, in other words, the value of the potential on their surface is not defined or fixed [1]- [10]. For example, electrode core of high-voltage inductors [1], floating electrodes of IEC surge arresters [2], defects in ultra-high-voltage gas-insulated switchgear [3], passive electrodes of earthing systems [4], conductor of floating-gate transistors [5], plasma analyzer for spacecraft floating potential measurements [6], and metallic nanostructures in optoelectronic devices [7] can all be modeled as isolated conductors in electrostatic simulations.…”

Section: Introductionmentioning

confidence: 99%

Modeling Floating Potential Conductors Using Discontinuous Galerkin Method

2020

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Isolated conductors appear in various electrostatic problems. In simulations, an equipotential condition with an undefined/floating potential value is enforced on the surface of isolated conductors. In this work, a numerical scheme making use of the discontinuous Galerkin (DG) method is proposed to model such conductors in electrostatic problems. A floating-potential boundary condition, which involves the equipotential condition together with a total charge condition, is ''weakly'' enforced on the conductor surfaces through the numerical flux of the DG method. Compared to adaptations of the finite element method used for modeling conductors, this proposed method is more accurate, capable of imposing charge conditions, and simpler to implement. Numerical results, which demonstrate the accuracy and applicability of the proposed method, are presented. INDEX TERMS Discontinuous Galerkin method, electrostatics, finite element method, floating potential conductors, magnetostatics, plasmonic-enhanced photoconductive antenna.

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“…Isolated conductors exist in a wide range of electrical and electronic systems, such as electrode cores of high‐voltage inductors, 1 metallic separators of IEC surge arresters, 2 defects in ultra‐high‐voltage gas‐insulated switchgear, 3 passive electrodes of earthing systems, 4 conductors of floating‐gate transistors, 5 and, more recently, metallic nanostructures extensively used in optoelectronic devices 6 . In electrostatic simulations of these systems, these conductors result in equipotential surfaces with unfixed (ie, floating) electric potential values (which depend on the simulation parameters and the geometries of the structures involved) and are referred to as floating potential conductors (FPCs).…”

Section: Introductionmentioning

confidence: 99%

A hybridizable discontinuous Galerkin method for simulation of electrostatic problems with floating potential conductors

Chen

Dong

et al. 2020

Int J Numerical Modelling

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In an electrostatic simulation, an equipotential condition with an undefined/floating potential value has to be enforced on the surface of an isolated conductor. If this conductor is charged, a nonzero charge condition is also required. While implementation of these conditions using a traditional finite element method (FEM) is not straightforward, they can be easily discretized and incorporated within a discontinuous Galerkin (DG) method. However, DG discretization results in a larger number of unknowns as compared to FEM. In this work, a hybridizable DG (HDG) method is proposed to alleviate this problem. Floating potential boundary conditions, possibly with different charge values, are introduced on surfaces of each isolated conductor and are weakly enforced in the global problem of HDG. The unknowns of the global HDG problem are those only associated with the nodes on the mesh skeleton and their number is much smaller than the total number of unknowns required by DG. Numerical examples show that the proposed method is as accurate as DG while it improves the computational efficiency significantly.

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Electrical insulation of high voltage inductor with co-axial electrode at floating voltage

Cited by 6 publications

References 6 publications

Sensitivity Analysis Based New Numerical Approach with Green Function for Optimization

Sensitivity Analysis Based New Numerical Approach with Green Function for Optimization

Modeling Floating Potential Conductors Using Discontinuous Galerkin Method

A hybridizable discontinuous Galerkin method for simulation of electrostatic problems with floating potential conductors

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