Experimental study of epoxy surface discharge under different frequencies

Conference paper (2021)

Authors

T. Luo High Voltage Technology Group - EEMCS
W. Zhao High Voltage Technology Group - EEMCS
M. Ghaffarian Niasar High Voltage Technology Group - EEMCS
Research Group
High Voltage Technology Group (EEMCS) (TU Delft)
Copyright: © 2021 T. Luo, W. Zhao, M. Ghaffarian Niasar
DOI: https://doi.org/10.1109/CEIDP50766.2021.9705381
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Published Date

2021

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

High Voltage Technology Group

Abstract

With widely use of power electronics in medium voltage level, there is increasing concern about behaviour of insulation material under arbitrary voltage stress. Solid-gas insulation is a general choice in medium voltage level. Therefore, it’s unavoidable to encounter surface discharge problem. In this paper, the surface discharge on epoxy-air interface is investigated, which is a commonly used insulation material. Point to plate electrode was used to test the surface flashover voltage and partial discharge (PD) behaviour at 50Hz, 500Hz, 1kHz, 2kHz and 5kHz. As the result, with increasing frequency, PDIV keeps roughly constant and flashover voltage first increases and then decrease, and the frequency obtaining highest flashover voltage is related to gap length.