Influence of Surface Charge Induced by Nano-Second Pulse on Field Distribution of Vacuum Insulator
Author(s): Sun Zelai, Qi Bo, Li Chengrong, Gao Jixin, Jin Zhiyang, Xing Zhaoliang, Beijing Key Laboratory of High Voltage and Electromagnetic Compatibility, North China Electric Power University, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University
Pages: 1437-1442
Year: 2015 Issue: 12
Journal: Vacuum Science and Technology
Keyword: Nanosecond pulse; Vacuum; Charge accumulation; Electrostatic capacitance probe; Electric field distribution; Flashover;
Abstract: The field distribution on the vacuum insulator,originated from the nano-second pulse induced charge accumulation,wasmathematically modeled,analytically calculated,numerically simulated with software ANSYS and experimentally evaluated with a lab-built setup. The influence of the surface properties,including the resistivity and microstructures,on the surface distributions of charge density and field was investigated with scanning electron microscopy. The results show that depending on the surface property of the insulator,the charge accumulation often strongly increases the surface field distribution with few exceptions. At most,the field could be enhanced by two times. We suggest that the insulating properties could be enhanced with the surfaces highly resistant to surface charge accumulation.
Pages: 1437-1442
Year: 2015 Issue: 12
Journal: Vacuum Science and Technology
Keyword: Nanosecond pulse; Vacuum; Charge accumulation; Electrostatic capacitance probe; Electric field distribution; Flashover;
Abstract: The field distribution on the vacuum insulator,originated from the nano-second pulse induced charge accumulation,wasmathematically modeled,analytically calculated,numerically simulated with software ANSYS and experimentally evaluated with a lab-built setup. The influence of the surface properties,including the resistivity and microstructures,on the surface distributions of charge density and field was investigated with scanning electron microscopy. The results show that depending on the surface property of the insulator,the charge accumulation often strongly increases the surface field distribution with few exceptions. At most,the field could be enhanced by two times. We suggest that the insulating properties could be enhanced with the surfaces highly resistant to surface charge accumulation.
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