2000
DOI: 10.1088/0022-3727/33/10/310
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Abstract: In order to check our physical model for partial discharges (PDs) in a tree channel, the light emission from a PD in an actual tree was observed. The experimental results agreed with the model. By using the model, conditions for the formation of typical phase-amplitude-number (ϕ-q-n) pattern of PDs from treeing was discussed.

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Cited by 39 publications
(26 citation statements)
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“…Based on proposed initiation and propagation mechanisms of electrical trees [10,[16][17][18][19][20][21][22] and the experimental results in this paper, it is suggested that similar initiation mechanisms exist among all of the trees in our experiments [14,15,23]. The initiating processes of electrical tree in the inner layer of 66 kV XLPE cable are: electron injection and extraction at the needle electrode due to high electric field, part of the insulation in the front of needle will be deteriorated by this process, this is followed by the intense partial discharge and photo-ionization due to charge recombination in the channel of the tree, the continuous micro-breakdown at the tree tips and the electron avalanche mechanisms, etc.…”
Section: Discussionmentioning
confidence: 99%
“…Based on proposed initiation and propagation mechanisms of electrical trees [10,[16][17][18][19][20][21][22] and the experimental results in this paper, it is suggested that similar initiation mechanisms exist among all of the trees in our experiments [14,15,23]. The initiating processes of electrical tree in the inner layer of 66 kV XLPE cable are: electron injection and extraction at the needle electrode due to high electric field, part of the insulation in the front of needle will be deteriorated by this process, this is followed by the intense partial discharge and photo-ionization due to charge recombination in the channel of the tree, the continuous micro-breakdown at the tree tips and the electron avalanche mechanisms, etc.…”
Section: Discussionmentioning
confidence: 99%
“…8a, b). Wu et al [45] showed that as length of micro-cavity increases, the effect of the field due to charged particles inside the micro-cavity becomes more evident. Generally, for the MM case, the field at the dielectric anode is reduced considerably within a very short time.…”
Section: Micro-cavity Lengthmentioning
confidence: 99%
“…The assumption under discussion will remain valid only if the PD acquisition time is negligible with respect to the rate of the tree-growth. In the presence of branched trees, the PD activity is often unstable and characterized by bursts of intense activity followed by moderate activity due to the different conditions of the various branches, [36,37]. Thus the PD-signals have shown different shapes and the above assumption is not valid any more, [32,35].…”
Section: Pd In Solid Dielectricsmentioning
confidence: 99%