Feasibility study on FGM (functionally graded materials) application for gas insulated equipment

Shumiya, Hideki; Katō, K.; Ōkubo, H.

doi:10.1109/ceidp.2004.1364262

Cited by 24 publications

(8 citation statements)

References 4 publications

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“…GLP-FGM is obtained by adding larger grains of low-permittivity filler, and then applying a centrifugal force. Specifically, we utilize the fact that the viscous force in the base material depends strongly on the filler grain size: that is, the viscous force increases with decreasing size of the filler grains [6][7][8]. In addition, centrifugal sedimentation is caused by the balance between the viscous force of the base material and the applied centrifugal force.…”

Section: Fabrication Of Fgm For Real Devicesmentioning

confidence: 99%

“…As regards the discharge mechanism, we may assume that the discharge in the gas starts at a point of balance between the electric field strength and the critical volume (V cr ). Therefore, considering experimental data on the discharge starting point [5,7], we defined the TJ electric field (E TJ ) as the field (absolute value) 30 µm away from a TJ.…”

Section: Estimation Of the Effect Of Fgm Application By Electric Fielmentioning

confidence: 99%

“…In this context, the authors proposed FGM (functionally graded materials) with spatial permittivity gradient as solid insulators for electric devices in order to obtain high insulation performance with a simple shape of the electrodes and insulators [4][5][6][7]. The concept of FGM is illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

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Application feasibility of permittivity graded FGM (functionally graded materials) for gas‐insulated equipment

Shumiya

Katō

Ōkubo

2007

Electrical Engineering Japan

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SUMMARYFor the size reduction of electric power equipment, the electric field stress around solid insulators is to be carefully designed. This concern will be solved by the application of FGM (Functionally Graded Materials). In this paper, we investigated an application feasibility of FGM from numerical simulation, and the fabrication technique for gas insulated equipment. Finally, we could confirm the significant effect of FGM application for gas insulated equipment.

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Section: Fabrication Of Fgm For Real Devicesmentioning

confidence: 99%

Section: Estimation Of the Effect Of Fgm Application By Electric Fielmentioning

confidence: 99%

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Application feasibility of permittivity graded FGM (functionally graded materials) for gas‐insulated equipment

Shumiya

Katō

Ōkubo

2007

Electrical Engineering Japan

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“…Application of functionally graded materials with gradually changed permittivity distribution to solid insulating spacers is considered, aiming at more compact gas‐insulated switch gear (GIS). Spacers using permittivity‐graded materials offer electric field control functions contributing to more compact device design through field relaxation at triple junctions of spacer/insulating gas/electrode, field leveling at spacer surface, field relaxation at spacer/electrode interface, and so on. These effects were clarified in electric field simulations and insulation breakdown tests using spacer models …”

Section: Introductionmentioning

confidence: 99%

FEM simulation of local field enhancement close to lamination interface of permittivity‐graded material

Kurimoto

Ozaki

Sawada

et al. 2018

Elect Comm in Japan

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For size reduction of gas insulated switchgears (GIS), application of permittivity‐graded material to insulating spacer has been studied. The electric‐field‐enhancement close to the lamination interface of the permittivity‐graded material obtained by laminating epoxy composites with different permittivities was investigated. The FEM simulation revealed that the increase of the layer number of the permittivity‐graded material could reduce the field enhancement close by the lamination interface, even when considering electric field distortion near the individual high‐permittivity particles filled in each layer.

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“…Then, it is necessary to propose a new concept on insulators with keeping their simple structure and configurations. Hence, we proposed FGM application to the solid spacer, and made the fundamental investigation of FGM [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Optimization Techniques on Permittivity Distribution in Permittivity Graded Solid Insulators

Ōkubo

Shumiya

Ito

et al.

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation

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We have proposed a new concept for solid insulation; an application of FGM (Functionally Graded Materials). By controlling the distribution of dielectric permittivity inside solid insulators, we can achieve the efficient field control with keeping simple configuration of solid insulators.In this paper, we described a computer-aided optimization technique for the FGM solid insulators. By controlling the filler particle concentration in the matrix, an optimized field distribution is obtained. From the calculation results, we confirmed that the proposed optimization method could obtain novel distributions of permittivity, which have the highest performance of the field control effect. Finally, we could confirm the significant effect of FGM application for gas / solid composite insulation system.

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Feasibility study on FGM (functionally graded materials) application for gas insulated equipment

Cited by 24 publications

References 4 publications

Application feasibility of permittivity graded FGM (functionally graded materials) for gas‐insulated equipment

Application feasibility of permittivity graded FGM (functionally graded materials) for gas‐insulated equipment

FEM simulation of local field enhancement close to lamination interface of permittivity‐graded material

Optimization Techniques on Permittivity Distribution in Permittivity Graded Solid Insulators

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