Suppression of Metal Particles by Coating for a ±550 kV DC GIS

Hanhua Luo, Duohu Gong, Shan Li, Zhongqiang Zhan, Niyaer Di, Dilyar Dolkun, Xianhao Fan () and Xiangdong Liu ()
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Hanhua Luo: Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Duohu Gong: Xinjiang Electric Power Research Institute, State Grid, Urumqi 830011, China
Shan Li: Xinjiang Electric Power Research Institute, State Grid, Urumqi 830011, China
Zhongqiang Zhan: Xinjiang Electric Power Research Institute, State Grid, Urumqi 830011, China
Niyaer Di: Xinjiang Electric Power Research Institute, State Grid, Urumqi 830011, China
Dilyar Dolkun: Xinjiang Electric Power Research Institute, State Grid, Urumqi 830011, China
Xianhao Fan: Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Xiangdong Liu: Department of Electrical Engineering, Hebei University of Technology, Tianjin 300401, China

Energies, 2024, vol. 17, issue 22, 1-14

Abstract: Coating the inner surface of grounded enclosures has been used to inhibit metal particle motion inside AC GIS for many years. However, for DC GIS, only fundamental research has been performed, while very few attempts have been made on real DC GIS. This paper reviews the basic research into the inhibition of metal particles by coating at DC. On this basis, based on a ±550 kV DC GIS busbar, an inhibition test of metal particle motion using coating was performed. Four types of metal particles were used as samples to verify the inhibitory effect of the grounded enclosure coating. The results showed that the coating has a very good inhibitory effect on block and powder metal particles on real GIS, and there are rarely any metal particles moving again under the rated DC voltage. However, for wire and flake metal particles, the effectiveness of the coating depends on the way the particle contacts the ground electrode when they are still, and ~30% of wire and flake metal particles can be inhibited. The conclusion of this paper is of guiding significance for the research and development of stable and reliable DC gas-insulated equipment.

Keywords: metal particles; GIS busbar; inhibitory effect; film coating (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: 2024
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