Abstract
We investigated the sequential generation characteristics of partialdischarge (PD) pulses in SF6 gas under the application of a positive dcvoltage, in order to discuss the PD mechanism based on space charge behaviourand corona stabilization effect. Highly time-resolved measurement of PDcurrent pulses enabled us to discuss the relationship between the PD chargeq and the time interval Δt of sequential PD pulses. Experimentalresults revealed that q-Δt characteristics exhibited negative andpositive correlation at small and large Δt regions, respectively.Numerical calculations of ion diffusion and ion drift verified thetime-dependent characteristics of the space charge behaviour and the resultantcorona stabilization effect.
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