Distribution of stems around the HV electrode in a 0.74-m air gap under positive pulses

A schlieren system with a temporal resolution of 5 μs and a spatial resolution of 70 μm was established; it was used to examine the spatial distribution of stems around different HV electrodes in a 0.74-m air gap under positive impulses. The results show that there is always more than one stem devel...

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Published in:IEEE transactions on dielectrics and electrical insulation 2018-02, Vol.25 (1), p.372-375
Main Authors: Jiang, Zhenglong, He, Junjia, Zhao, Xiangen, Xiao, Pei, Yang, Yongchao
Format: Article
Language:English
Subjects:
Air gaps
Corona
Curvature
Discharges (electric)
Electrodes
Lightning
Positive discharge
Positive impulse voltage
schlieren system
Spatial distribution
Spatial resolution
stem
Surface discharges
Switches
Temporal resolution
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description A schlieren system with a temporal resolution of 5 μs and a spatial resolution of 70 μm was established; it was used to examine the spatial distribution of stems around different HV electrodes in a 0.74-m air gap under positive impulses. The results show that there is always more than one stem developing from the HV electrode surface. On the basis of the high spatial resolution of schlieren photographs, the distribution of stems around the HV electrode is investigated considering the influence of the curvature radius of the electrode and the rising rate of the voltage impulse.
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subjects Air gaps
Corona
Curvature
Discharges (electric)
Electrodes
Lightning
Positive discharge
Positive impulse voltage
schlieren system
Spatial distribution
Spatial resolution
stem
Surface discharges
Switches
Temporal resolution
title Distribution of stems around the HV electrode in a 0.74-m air gap under positive pulses
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