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Homogeneous discharge is a hot topic with a lot of practical value in the field of plasma. With the change of gas condition (e.g. the gas pressure and composition etc.), a transition from partial discharge mode (or filamentary mode) to homogeneous discharge occurs. In this article, the surface charge behavior of the transition from filamentary mode to homogeneous mode was investigated. The dynamic...
The mathematical model of the PD process in the lonely inclusion can be described as a series of discharges at the period of the operation voltage. Distribution of the separate discharge times depends on breakdown correlation, extinction and initial condition voltages and the operation voltage. These factors are deterministic as physical phenomena and are stochastic as a result of their influence...
The homogenous discharges under low pressure have been widely used in many fields, but the influence factors that determine the discharge characteristics are still not clear. So, it is necessary to study the formation mechanism of homogenous discharge and transition process from partial discharge to homogeneous filamentary discharge. It was known that residual surface charge on the dielectrics play...
The accumulation of surface charge generated by discharge at the solid-gas interface is an import factor that can affect PD characteristics. In this paper, the decay time of surface charge was measured by the surface charge measurement system based on Pockels effect, and the effect of surface charge decay on variation of partial discharge location was investigated by changing the cycle of applied...
Simultaneous discharge, characterized by single current pulse corresponding with more than one discharge spots in one PD (partial discharge), was observed in the partial discharge sequences, especially for the first discharge after voltage application. However, its mechanism has not been understood clearly. In this report, we investigated the effects of photoionization and overvoltage on the probability...
Partial discharge (PD) occurring in gas void introduced during the manufacturing process of insulating constructions forms a serious threat to the life of insulation, hence it's necessary to clarify its mechanism. In our paper, the surface charge measurement system based on Pockels effect was constructed to detect the residual surface charge distribution after PD occurred in a cylindrical void enveloped...
The hydrophobicity evaluation for polymer insulators continues to be a prominent characteristic. For the purpose of evaluating the hydrophobicity of polymer insulator, a VHF antenna was utilized to receive high frequency electromagnetic signals, which were induced during the surface discharge on the sample surface. The wavelet theory was applied to analyze the electromagnetic signals that were processed...
Epoxy resin has become an integral part of electronic and electrical devices where the material is exposed to pulse stress. Surface charge accumulation and decay of charged dielectric materials are very important parameters related to the electrical properties of the material. Nano-composite technology makes it possible to improve electrical properties of insulating materials. Therefore, it is important...
Epoxy resin has become an integral part of electronic and electrical devices for their excellent mechanical and electrical performance. Nano-composite technology makes it possible to improve electrical properties of insulating materials. For the use of nanocomposites of epoxy resin, it must be confirmed whether the electrical performance with nanoparticles is different from that without nanoparticles...
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