期刊
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
卷 28, 期 2, 页码 736-744出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TDEI.2020.009343
关键词
functionally graded materials (FGM); electric field grading; DC steady state; polarity reversal; conductivity; permittivity
资金
- JSPS KAKENHI [JP18H01423]
This paper discusses the application of functionally graded materials in controlling electric fields, and finds that FGM with U-type permittivity and GHC-type conductivity distribution is the most effective in reducing maximum electric field strength.
This paper discusses the application of the novel technology - functionally graded material (FGM), which combines both spatial permittivity (epsilon) and conductivity (sigma) distributions with the aim to control the electric field around DC-GIS spacer. Some distribution types of epsilon and/or sigma 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 epsilon and sigma distributions. The electric field relaxation effect of each distribution type of epsilon/sigma-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 epsilon/sigma-FGM with U-type permittivity and GHC-type conductivity distribution of which low s 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.
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