1996
DOI: 10.1088/0022-3727/29/11/028
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Abstract: We have investigated the partial discharge (PD) due to electrical treeing degradation in low-density polyethylene (LDPE), ethylene - vinyl acetate copolymer (EVA) and ethylene - acrylic acid copolymer (EAA) by a computer-aided partial discharge measurement system which allowed us to obtain phase-resolved PD pulse data. The experimental results revealed that the PD magnitude was strongly affected by the instantaneous applied voltage and that the occurrence of a PD was determined by the time derivative of the ap… Show more

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Cited by 87 publications
(46 citation statements)
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“…Both S Kþ and S KÀ exhibit a negative trend with ageing. The effect of conductivity in the channels has been proposed to be responsible for similar changes observed and modelled for trees in ethylene-acrylic acid copolymer (EAA) [28,48,49]. Similar to these observations, a decrease in partial discharge activity ( Figure 4) and tree growth rate is observed after the transition from the branched to the bush-type structure.…”
Section: Temporal Evolution and Retardation Of Tree Propagationsupporting
confidence: 64%
“…Both S Kþ and S KÀ exhibit a negative trend with ageing. The effect of conductivity in the channels has been proposed to be responsible for similar changes observed and modelled for trees in ethylene-acrylic acid copolymer (EAA) [28,48,49]. Similar to these observations, a decrease in partial discharge activity ( Figure 4) and tree growth rate is observed after the transition from the branched to the bush-type structure.…”
Section: Temporal Evolution and Retardation Of Tree Propagationsupporting
confidence: 64%
“…It shows as a winglike pattern, which is the same as the typical PD pattern in electrical trees [19]. In the simulation, the size of the plane distance is 70, which is assumed to correspond to 3.5mm in a practical experiment.…”
Section: The Numerical Calculation Methods Of the Modelmentioning
confidence: 94%
“…The use of statistical analysis to analyze the PD data is very useful to quantify the partial discharge parameters to enhance the PD pattern [5][6][7]. An analysis of the kurtosis and the skewness confirmed that positive and negative polarity had counterclockwise and clockwise clustering distribution, respectively.…”
Section: Introductionmentioning
confidence: 97%
“…The most common way to present the PD data is the graph of ϕ-q-N pattern that representing the phase angle of PD occurrence (ϕ), the PD apparent charge (q) and the pulses' number of PD (N) [4,5]. This graph is called phase resolved PD (PRPD) pattern that is currently used by many researchers to evaluate the PD data.…”
Section: Introductionmentioning
confidence: 99%