Measured and simulated time-evolution PD characteristics of typical installation defects in MV XLPE cable terminations

Haikali, E. N. N.; Nyamupangedengu, Cuthbert

doi:10.23919/saiee.2019.8732785

Cited by 8 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [9], after studying the characteristics of internal PDs inside cable terminations at very low temperature environments, a method for assessment of insulation status in cable terminations at such conditions has been proposed. The authors in [10] have studied the time-evolution of PD parameters for typical installation defects in MV cable terminations. The unique changes of PD patterns then have been used to identify the defect type.…”

Section: Literature Reviewmentioning

confidence: 99%

Analytical investigations on discrimination of partial discharge defective cable termination among healthy ones with joint sheath‐ground connection

Babaee

Shahinfar

Shahrtash

2022

IET Generation Trans & Dist

View full text Add to dashboard Cite

Industrial complexes suffer from crosstalk of Partial Discharge (PD) defects in cable terminations connected to the same medium voltage busbars. This phenomenon happens because the sheath-ground connections of all cables of one switchboard are first fastened together and then connected to ground, which leads to PD pulses being induced from the source termination to others. In this paper, based on mathematical investigations on PD pulse propagation and by introducing an energy-based index, a simple rule-based procedure is proposed for discrimination between defective terminations and healthy ones connected to common busbars. The proposed procedure has been verified by simulations even when there exists noise pollution or multiple defects of different strengths.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Analytical investigations on discrimination of partial discharge defective cable termination among healthy ones with joint sheath‐ground connection

Babaee

Shahinfar

Shahrtash

2022

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…The PD test was carried out to analyze the behavior of the PDs with voltage function in order to indicate the creation of electrical trees or any detectable voids from very small microcavities in the tested cable system [6]. PDs have distinguishable characteristics at different stages of the aging process which are typically characterized by their magnitude, pulses number per power cycle, phase-resolved PD patterns (PRDP), and dependence on the applied voltage [7].…”

Section: Setup Of Experimentsmentioning

confidence: 99%

Insulation Performance Analysis of Field Aged and New MV XLPE Cables Using Various Diagnostic Techniques

et al. 2021

View full text Add to dashboard Cite

Cross-linked polyethylene (XLPE) cables are widely used in the distribution and transmission networks of power systems. The insulation materials of these cables are stressed by the over voltages and are also exposed to various environmental conditions. This leads the power cables to degrade during their normal life span. Therefore, it would be advantageous for the power utilities to acquire the cable’s insulation condition frequently during their operation. In this paper, experimental studies were carried out on short sections of field aged as well as un-aged medium voltage (MV) XLPE cables to investigate the insulation condition using non-destructive diagnostic techniques such as Dissipation Factor (DF), Isothermal Relaxation Current (IRC), and Partial Discharge (PD) characteristics at 60Hz. From this set of experiments, different parameters will be used to analyze the dielectric response and the insulation condition. Finally, the results show how the VLF dissipation factor works efficiently to assess cable aging.

show abstract

“…Common methods for power cables include DC superposition, dielectric loss tangent, partial discharge (PD), distributed temperature measurement, magnetic field detection, etc. [8][9][10][11][12]. Among these methods, partial discharge detection is the most widely recognized due to its accurate and reliable results.…”

Section: Introductionmentioning

confidence: 99%

Defect Identification of XLPE Power Cable Using Harmonic Visualized Characteristics of Grounding Current

Wang,

Liu,

Huang

et al. 2024

Electronics

View full text Add to dashboard Cite

This paper proposes an online monitoring and defect identification method for XLPE power cables using harmonic visualization of grounding currents. Four typical defects, including thermal aging, water ingress and dampness, insulation scratch, and excessive bending, were experimentally conducted. The AC grounding currents of the cable specimens with different defects were measured during operation. By using the chaotic synchronization system, the harmonic distortion was transformed into a 2D scatter diagram with distinctive characteristics. The relationship between the defect type and the diagram features was obtained. A YOLOv5 (you only look once v5) target recognition model was then established based on the dynamic harmonics scatter diagrams for cable defect classification and identification. The results indicated that the overall shape, distribution range, density degree, and typical lines formed by scatter aggregation can reflect the defect type effectively. The proposed method greatly reduces the difficulty of data analysis and enables rapid defect identification of XLPE power cables, which is useful for improving the reliability of the power system.

show abstract

Measured and simulated time-evolution PD characteristics of typical installation defects in MV XLPE cable terminations

Cited by 8 publications

References 14 publications

Analytical investigations on discrimination of partial discharge defective cable termination among healthy ones with joint sheath‐ground connection

Analytical investigations on discrimination of partial discharge defective cable termination among healthy ones with joint sheath‐ground connection

Insulation Performance Analysis of Field Aged and New MV XLPE Cables Using Various Diagnostic Techniques

Defect Identification of XLPE Power Cable Using Harmonic Visualized Characteristics of Grounding Current

Contact Info

Product

Resources

About