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For HVDC cables, dielectric field inversion normally occurs due to the temperature drop across the insulation. Unlike AC applications where the field distribution is primarily determined by the cable geometry, the DC field can be significantly affected by the load current and hence the dielectric temperature profile. Higher temperature drops lead to higher electrical stress at the insulation screen,...
Electrical discharge on liquid surface which acts as liquid electrode had been extensively investigated for many years for its various applications such as water treatment and plasma sterilization and ozone generatoret.al. In this paper, electrical and optical characteristics of pulsed streamer discharge on water surface under different water conductivity are investigated. Repetitive pulses of 25...
It is experimentally testified that the voltage hold-off capability of alumina in vacuum is usually less than that of a similar-sized vacuum gap and also is far below its bulk breakdown strength. In this work, both bulk doping and surface coating were taken into consideration to modify the surface of 95%alumina in hope to improve its insulating property in vacuum and satisfying results were achieved...
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