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- W4312513830 abstract "Lightning impulse (LI) test is an effective means to detect insulation defects in gas-insulated metal-enclosed switchgear (GIS). However, the wavefront time <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${T}_{f}$ </tex-math></inline-formula> of LI has a great influence on the breakdown characteristics of GIS with insulation defects. In this article, the sensitivity analysis of breakdown voltage to <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${T}_{f}$ </tex-math></inline-formula> was studied. The sensitivity coefficient <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${k}_{e}$ </tex-math></inline-formula> was proposed to evaluate the sensitivity of breakdown voltage to <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${T}_{f}$ </tex-math></inline-formula> for different insulation defects. The results showed that the nonuniformity of electric field is the key factor that affects the sensitivity coefficient <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${k}_{e}$ </tex-math></inline-formula> . The influence of <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${T}_{f}$ </tex-math></inline-formula> becomes more significant with the increase of the nonuniformity of electric field. The application of the sensitivity coefficient <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${k}_{e}$ </tex-math></inline-formula> to the evaluation of insulation defects detection was implemented, and the results verified that the impulse detecting effectiveness of insulation defects can be obtained quantitatively for defects with different electric field inhomogeneity coefficients." @default.
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- W4312513830 date "2023-02-01" @default.
- W4312513830 modified "2023-10-18" @default.
- W4312513830 title "Sensitivity Analysis of Breakdown Voltage for Defects in GIS: A Reexamination on Impulse Wavefront Times" @default.
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- W4312513830 doi "https://doi.org/10.1109/tdei.2022.3220480" @default.
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