Comparison between the PD Characteristics of g 3 and Dry Air for Gas-Insulated Switchgears

Goang-Chul Shin, Sung-Wook Kim and Gyung-Suk Kil ()
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Goang-Chul Shin: Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
Sung-Wook Kim: Department of Electrical & Electronic Engineering, Silla University, Busan 46958, Korea
Gyung-Suk Kil: Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University, Busan 49112, Korea

Energies, 2022, vol. 15, issue 19, 1-12

Abstract: This paper presents a comparison between the partial discharge (PD) characteristics of g 3 and dry air for gas-insulated switchgears. PD signals were measured with a conventional method according to IEC 60270 and an ultra-high frequency (UHF) method. The partial discharge inception voltages (PDIVs) of g 3 and dry air are about 74% to 84% and 58% to 72%, respectively, in the protrusion on conductor (POC) system, and 90% to 96% and 80% to 93%, respectively, in the free moving particle (FMP) system, depending on the gas pressure of 0.1 MPa to 0.5 MPa. The single PD pulse in time and frequency domains are not distinguished according to gas type. The PRPD patterns have different phase angles depending on the gas type in the POC, while the phase angle is 0–360° in the FMP, regardless of the gas type. Lastly, the correlation was analyzed, showing that the output voltage in mV of the UHF sensor increases linearly in accordance with the apparent discharge in pC, regardless of the gas type. The experimental results in this paper are important as a fundamental database for the application of UHF monitoring systems in an eco-friendly GIS.

Keywords: eco-friendly gas-insulated switchgear; partial discharge; g 3; dry air; UHF sensor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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