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Water droplets on polymeric insulating surfaces provide an intensified E-field stress at the common interface between water droplet, insulating surface and surrounding air, which may lead to partial discharges, surface deterioration or even flashover. While intensive research has been performed for the AC case and also for the DC case, a new kind of stress may arise by the combination of both, which...
This paper investigates the partial discharge inception voltage of a single water droplet with different conductivities and viscosities on silicon rubber insulator surface under the impact of tangential AC electric field stress. Outdoor polymeric insulators are subjected to different environmental conditions, causing the formation of different types of water droplets like rain water, fog, saline water...
For this contribution, different oscillation modes of a 20 microliter water droplet on the hydrophobic surface of a silicone rubber insulator under tangential AC electric field stress were investigated, using a high speed camera. Since the deformation of water droplet increases the local electric field stress at the triple zones, an electric field analysis at the triple zone is performed to find the...
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