Electric field simulation of permittivity and conductivity graded materials (ε/σ-FGM) for HVDC GIS spacers

Rachmawati, Kojima, Hiroki, Hayakawa, Naoki, Kato, Katsumi and Zebouchi, Nabila 2021. Electric field simulation of permittivity and conductivity graded materials (ε/σ-FGM) for HVDC GIS spacers. IEEE Transactions on Dielectrics and Electrical Insulation 28 (2) , pp. 736-744. 10.1109/TDEI.2020.009343

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Abstract

This paper discusses the application of the novel technology - functionally graded material (FGM), which combines both spatial permittivity (ε) and conductivity (σ) distributions with the aim to control the electric field around DC-GIS spacer. Some distribution types of ε and/or σ in the spacer bulk, such as U-type and graded to higher conductivity (GHC) are investigated through electric field simulation, in comparison to the uniform spacer with constant ε and σ distributions. The electric field relaxation effect of each distribution type of ε/σ-FGM under DC steady state, DC polarity reversal, DC-on, and lightning impulse voltage superimposed on DC steady state condition are obtained. The results show that ε/σ-FGM with U-type permittivity and GHC-type conductivity distribution of which low σ is applied near the high voltage side of the DC-GIS spacer is the most effective in reducing the maximum electric field under all stated conditions.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Institute of Electrical and Electronics Engineers (IEEE)
ISSN:	1070-9878
Last Modified:	07 May 2021 13:00
URI:	https://orca.cardiff.ac.uk/id/eprint/140967

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