Characteristics of PD pulses in electrical trees and interfaces in extruded cables

Densley, J.; Kalicki, T.; Nodolny, Z.

doi:10.1109/94.910425

Cited by 42 publications

(17 citation statements)

References 12 publications

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“…Because of the manufacturing technique, some defects may be brought during the manufacturing process. Ununiformed electrical field caused by the structure and defects may lead to dielectric failure inside the accessories [3,4].…”

Section: Introductionmentioning

confidence: 99%

Effect of magnetic field on tree characteristics in silicone rubber

Han

Le³

et al. 2015

2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD)

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Silicone rubber (SiR) has been an important material widely used in the cable accessories in cross-linked polyethylene (XLPE) cables. The electrical tree is a serious threat to SiR insulation and it will cause breakdown when reaches the ground. The high carrying capacity of superconducting cable makes the magnetic flux density up to hundreds of mT around the conductor. However, the effect of high magnetic flux density on electrical tree in SiR has not been researched. In this paper, the magnetic flux density ranged from 0 to 400 mT. The electrodes were typical needleplate electrodes. The frequency of the applied AC voltage was 50 Hz. The growth process of electrical tree was recorded by a microscope system and the pictures were taken. The experiment result indicated that the high magnetic flux density changes the tree structure and affects the growth of tree length and width.

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Section: Introductionmentioning

confidence: 99%

Effect of magnetic field on tree characteristics in silicone rubber

Han

Le³

et al. 2015

2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD)

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“…PD is affected by tree shape and conductance of channel [5], so partial discharge is closely related with electrical tree growth. A large number of studies have been reported on partial discharge of electrical trees and various techniques have been used to analyze PD characteristics during treeing, such as phase resolved distribution (PRPD) [6], single pulse waveform [7], trends [8] and inter time distribution (ITD) [9], aiming at extracting unique features of partial discharge to characterize electrical trees. However, it is difficult to determine the stage of the electrical trees by one or several partial discharge characteristics, and there must be numerous characteristics extracted from the partial discharges to evaluate the state of the electrical trees.…”

Section: Introductionmentioning

confidence: 99%

Partial discharge characteristics of electrical trees in XLPE power cables

Yang

Liao

et al. 2011

2011 Electrical Insulation Conference (EIC).

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This paper studies the initiation process and the PD characteristics of electrical trees, and proposes a new method to recognize the growth state of electrical trees. The experiment result show that the electrical trees PD energy mainly concentrated in the -40°~90° and 120°~250° of 5MHz~7.5MHz, -20°~90° and 150~250° of 7.5MHz~10MHz. With the dense increase of the electrical trees, the more PD energy will be found in the frequency 7.5MHz~10MHz. At the first development stage of electrical trees, the PD energy mainly located at the frequency 5MHz~7.5MHz, when electrical trees develop to the next stage, the more PD energy will be found at the frequency 7.5MHz~10MHz.

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“…A large number of studies have been reported on partial discharge of electrical trees with phase resolved distribution (PRPD) [7], single pulse waveform [8], trends [9] and inter time distribution (ITD) [10], expect to find suitable characteristics of partial discharge to support the diagnosis of electrical trees, however, usually these features are lack of corresponding physical mechanism supporting. The researches [4,[11][12] showed that the propagation characteristics of the electrical trees accord with the conditions of the deterministic chaos, the PD numbers develop trend in unit time are observed.…”

Section: Introductionmentioning

confidence: 99%

The Chaos Characteristics Analysis for Electrical Treeing Propagation in XLPE Power Cables

Liu

Quan

Liao

et al. 2008

Conference Record of the 2008 IEEE International Symposium on Electrical Insulation

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The electrical breakdown can be induced by electrical tree in cross-linked polyethylene (XLPE) cables. In order to study the electrical tree, the needle-plane electrode which is different from the cable in geometric configuration is usually used to simulate the defect in XLPE cable. In this paper, an actual 15kV XLPE cable was used to test the electrical tree, its electrical stress enhancing was simulated by a metal needle defect. The growth of electrical trees was detected by the digital partial discharge (PD) measurement, and the structures of them was observed from cross and vertical section by optical microscopy. The test results indicated that the width of electrical trees on cross section is greater than which on vertical section in the voltage range of AC 12kV to AC 21kV because of the different distribution of electric field. The chaos analysis for the time series of PD data indicated that the propagation of the electrical trees showed the characteristics of the deterministic chaos. And its maximal Lyapunov exponent and correlation dimension of the strange attractors increased with the decrease of the fractal dimension of the trees. Therefore, it demonstrated that the random propagation of the trees is limited by the reversed electrical field, and this limitation for the bush-like trees was less than the branch-like trees. This limitation was analyzed also through the mechanism of the trees growth.

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Characteristics of PD pulses in electrical trees and interfaces in extruded cables

Cited by 42 publications

References 12 publications

Effect of magnetic field on tree characteristics in silicone rubber

Effect of magnetic field on tree characteristics in silicone rubber

Partial discharge characteristics of electrical trees in XLPE power cables

The Chaos Characteristics Analysis for Electrical Treeing Propagation in XLPE Power Cables

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