Study on Characteristic Indexes Indicating the Influence of Pollution and Air Pressure on the DC Flashover Voltage of Insulator

Abstract:

Under low air pressure, dc arcs often levitate from surface of polluted insulator to form air-gap arcs during flashover process. The U-I characteristic of surface arc is different from that of air-gap arc. Considering the characteristic differences between surface arc and air-gap arc, the values of characteristic indexes indicating the effects of pollution and air pressure on flashover voltage are studied theoretically. The theoretical values of the characteristic indexes are also compared with reported experimental data.

• Periodical: Applied Mechanics and Materials (Volume 392)
• Pages: 403-408
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.392.403
• Online since: September 2013
• Authors: Ling Chen, Rui Liu, Yong Xing Cao
• Keywords: Air Pressure, Characteristic Indexes, DC Flashover Voltage, Insulator, Pollution Flashover

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