Investigation of Void Size and Location on Partial Discharge Activity in High Voltage XLPE Cable Insulation

Nascimento, Douglas; Refaat, Shady S.; Darwish, Ahmad; Khan, Qasim; Abu‐Rub, Haitham; Iano, Yuzo

doi:10.1109/wcnps.2019.8896268

Cited by 12 publications

(8 citation statements)

References 11 publications

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“…7 shows an illustration of the factors that initiate the occurrence of internal discharge in XLPE cables, such as, crack, delamination, air void and water tree. Electrical treeing and void as sources of internal discharges have received the most interest for discussion and research [17], [31]- [33]. The treeing phenomena drastically reduce the lifetime of cable insulation under high-frequency AC voltage and are worse under harmonic AC voltage [34].…”

Section: Internal Dischargementioning

confidence: 99%

“…Their results indicate that the electric field in the void decreases as the cable insulation thickness increases. Moreover, Do Nascimento et al [31] conducted a comparative experiment in 2019 to investigate the effects of electrical parameters, such as electric field, electric potential, current density, and electric field displacement due to changes in the location and size of the void inside XLPE insulated power cables [31]. They found that the location of the void inside XLPE insulated power cables has a higher impact on the electric field and the current density than the void size.…”

Section: Internal Dischargementioning

confidence: 99%

“…They found that the location of the void inside XLPE insulated power cables has a higher impact on the electric field and the current density than the void size. These parameters are inversely proportional to the location of the void and directly proportional to the void size [31].…”

Section: Internal Dischargementioning

confidence: 99%

“…Continuous improvement is essential as power cables are still in use. Thus, improving the reliability of power cables through PD monitoring and detection has become a vital part of power systems, resulting in energy cost savings of 5% to 10% [31].…”

Section: Internal Dischargementioning

confidence: 99%

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Partial Discharges Classification Methods in XLPE Cable: A Review

et al. 2021

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Partial discharge (PD) signal classification analysis on cross-linked polyethylene (XLPE) cables is complex, requiring a comprehensive understanding of the characteristics of PD patterns. In the realm of high-voltage electrical insulation, PD pattern characteristics, such as PD charge and inception voltage, are essential as assessment criteria in diagnostics systems using PD classifiers. This paper provides a review of various PD patterns and classifiers used by previous researchers, specifically for XLPE cables. In addition, the differences of the research on various sensor development based on PD detection in the past 27 years are also discussed. The repeatability, recognition accuracy, recognition speed, and effect of feature sizes on each PD classification method are reviewed and explained. The review indicates that the pattern recognition for PD signal using artificial neural network (ANN) exhibits better performance in terms of accuracy and repeatability than the other methods, and the reduction of feature size does not affect the accuracy of ANN.INDEX TERMS Partial discharge (PD), cross-linked polyethylene (XLPE) cable, solid insulator, pattern recognition, feature extraction, artificial neural network (ANN)

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Section: Internal Dischargementioning

confidence: 99%

Section: Internal Dischargementioning

confidence: 99%

Section: Internal Dischargementioning

confidence: 99%

Section: Internal Dischargementioning

confidence: 99%

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Partial Discharges Classification Methods in XLPE Cable: A Review

et al. 2021

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“…The development of PDs is also a result of the permittivity changes between a defect and the dielectric medium in the cable. Consequently, this leads to the chemical degradation of the insulation material and field ionization due to the collision of molecules arise, resulting in the avalanche effect [13]. Therefore, if monitoring techniques were not used, a breakdown of the cable dielectric material would take place.…”

Section: Partial Discharge Origin and Developmentmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Saleh

Refaat

Olesz

et al. 2020

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This paper is focusing on 3D Finite Elements Analysis (FEA) based modelling of protrusions as defects or imperfections in the XLPE high voltage cable. This study is aiming to examine the impact protrusions have on the initiation of partial discharges. Spherical and ellipsoidal protrusions with different sizes at the conductor screen of the high voltage cable is an essential content of this paper. In addition, a spherical gas-filled void is placed inside and outside the protrusions, and a water tree produced from protrusions is under consideration. The partial discharge influence taking place at the protrusions and the stress enhancement factor is determined for all the variations mentioned to quantify the rise in the inception of partial discharges due to the protrusions.

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