Comparative Laboratory Evaluation of Premolded Joints for Medium Voltage Cables

Yaroslavskiy, V.; Walker, Miles; Katz, C.; Keefe, R.J.

doi:10.1109/tpwrd.2007.915909

Cited by 11 publications

(6 citation statements)

References 4 publications

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“…Present results show that joint types A and D exhibit an increase in breakdown voltage due to aging. It is worth mentioning here that in a similar previous study, pre-molded MV joints displayed an increase in U b values due to cycling aging [21]. The results of U b values suggest that after aging, joint type A has better performance compared to others.…”

Section: Pd Measurementssupporting

confidence: 69%

“…The results show that there are large differences in the breakdown values of un-aged joints of different manufacturers. It is well known that even the joints of the same manufacturer and same production batch display a large statistical spread in their breakdown values [21]. Present results show that joint types A and D exhibit an increase in breakdown voltage due to aging.…”

Section: Pd Measurementssupporting

confidence: 46%

“…Investigations of failure paths in the joints give useful information about the critical areas and interfaces of the joint that need careful attention. It was reported in [21] that generally, in pre-molded type aged and un-aged joints that were subjected to breakdown testing, the following three modes of failure dominated: Mode 1: Radial failure through the joint body from ferrule to the outer screen; this will occur if the joint insulation is dielectrically overstressed.…”

Section: Examination Of Failed Jointsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Accelerated Laboratory Aging on Selected Electrical Properties of Medium-voltage Heat Shrink Cable Joints

Qureshi

Al-Arainy

Malik

2014

Electric Power Components and Systems

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Section: Pd Measurementssupporting

confidence: 69%

Section: Pd Measurementssupporting

confidence: 46%

Section: Examination Of Failed Jointsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Accelerated Laboratory Aging on Selected Electrical Properties of Medium-voltage Heat Shrink Cable Joints

Qureshi

Al-Arainy

Malik

2014

Electric Power Components and Systems

View full text Add to dashboard Cite

“…In the incubation period, it could be assumed that the expansion coefficient of the EPR polymer decreased faster than that of SCT polymer. As a result, the deformation of EPR became more severe [23,24].…”

Section: Characteristics Of Epr Insulation and Sct Sample Under Low Tmentioning

confidence: 99%

Partial discharge of cable termination on electric multiple unit of China high‐speed railway below zero‐degree centigrade

Bai

Zhou

et al. 2019

IET Science, Measurement & Technology

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“…As the core equipment for high-voltage power grid energy transmission, XLPE (Cross-linked Poly-ethylene) cables have a significant impact on the reliability of power grid operation [1]- [3]. Compared with the cable body, cable joints are prone to insulation degradation and breakdown due to their complex structure and on-site production.…”

Section: Introductionmentioning

confidence: 99%

The Partial Discharge Evolution Characteristics of 10kV XLPE Cable Joint

Tian,

Li,

Zhang

et al. 2023

IEEE Access

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The evolution of partial discharge (PD) with time can provide a deep understanding on the insulation status of power cables. It is of great significance for intelligent operation and maintenance of power cables. In this paper, the PD pulse signal in the 10kV cable joint during accelerated electrical aging under 20kV AC voltage was acquired in the real-time for about 160h. The characteristic parameters of partial discharge-pulse number, average voltage, maximum voltage and energy per second were extracted. The results show that the phase of partial discharge is mainly concentrated at 30°-90° and 200°-270°, which can be characterized as internal discharge. PD characteristic parameters gradually increased after 50h. The pulse number, energy per second and the average voltage of PD pulse reached a peak between 60-80h. Then these parameters reached a steady state between 80-130h and showed a steep rise after 130h. The maximum voltage of PD pulse shows a steep rise at about 70h from 0.1V to 0.3V. It rises sharply from 0.3V to 0.5V after about 120h and then enters a relatively stable oscillation stage. The evolution rules of the PD characteristic parameters comply well with the electrical tree growth states-initiation period, lag period and rapid growth period. Furthermore, model for predicting and evaluating the insulation state based on BP neural network are established and the prediction accuracy is verified. The proposed models can provide early warning for the cable joint before the insulation failure, so as to ensure timely maintenance or replacement.INDEX TERMS XLPE cable, partial discharge, accelerated electrical aging, BP neural network, state prediction.

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Comparative Laboratory Evaluation of Premolded Joints for Medium Voltage Cables

Cited by 11 publications

References 4 publications

Effect of Accelerated Laboratory Aging on Selected Electrical Properties of Medium-voltage Heat Shrink Cable Joints

Effect of Accelerated Laboratory Aging on Selected Electrical Properties of Medium-voltage Heat Shrink Cable Joints

Partial discharge of cable termination on electric multiple unit of China high‐speed railway below zero‐degree centigrade

The Partial Discharge Evolution Characteristics of 10kV XLPE Cable Joint

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