AC Withstand Characteristics of Gas-solid Hybrid Insulation Considering Flashover Along Barrier Surface

doi:10.11985/2021.02.009

Abstract

Abstract:

In order to analyze the relationship between the flashover along the barrier surface and the AC withstand voltage characteristics of the gas-solid hybrid insulation system, the equivalent breakdown path and the average electric field strength are analyzed by combining the AC withstand experiment and finite element simulation. It is found that the breakdown voltage of gas-solid hybrid insulation gap cannot be directly calculated through the typical breakdown path. Before gap breakdown, the average electric field strength along the surface path is different when the barriers are in different positions, but the average electric field strength of the barriers with different sizes is almost the same. The results show that when the breakdown voltage of a fixed size barrier at a given position is known, the breakdown characteristics of other size barriers at the same position can be predicted.

Key words: Gas-solid hybrid insulation, AC withstand characteristics, flashover, electric field strength

CLC Number:

TM85

ZHENG Yuesheng, XIE Xinda, HUANG Huifen, HE Tongtong. AC Withstand Characteristics of Gas-solid Hybrid Insulation Considering Flashover Along Barrier Surface[J]. Journal of Electrical Engineering, 2021, 16(2): 69-76.

Figures/Tables 13

References 23

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