Partial discharge characterization of cross-linked polyethylene medium voltage power cable termination defects at very low frequency (0.1 Hz) and power frequency test voltages

Fynes-Clinton, Daniel; Nyamupangedengu, Cuthbert

doi:10.1109/mei.2016.7528986

Cited by 38 publications

(26 citation statements)

References 15 publications

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“…In our previous work, the initial partial discharge signatures of typical defects in MV XLPE cable terminations were studied and found to exhibit distinct defect-type dependent features [7]. The present work further extends the investigation by studying how the partial discharge behaviour of the typical installation defects evolve with time under continuous PD activity.…”

supporting

confidence: 56%

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

Haikali

Nyamupangedengu

2019

SAIEE Afr. Res. J.

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supporting

confidence: 56%

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

Haikali

Nyamupangedengu

2019

SAIEE Afr. Res. J.

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“…Under long-term thermo-electrical stress, the defects may cause insulation in cable accessories to fail leading to undesirable and costly system downtime. Clinton et al [8] applied voltage with 0.1 Hz frequency and power frequency then investigated PD characteristics of an XLPE cable termination. Lee et al [9] carried out a series of experiments to determine the resultant partial discharge behavior of defects inside cable insulation at a termination.…”

Section: Introductionmentioning

confidence: 99%

Assessment of HDPE aged under DC voltage combined with AC harmonic stresses of various frequencies

Zhao

Siew

Given

et al. 2017

IEEE Trans. Dielect. Electr. Insul.

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One of the challenges on the increasing reliance on isolated renewable generation sources is the transmission of power from these sources to centers of power demand. One possible approach is the use of high voltage direct current (HVDC) transmission. The power electronic converters are key components in HVDC transmission system. The converters produce the intended DC voltage for transmission but there may also be AC harmonics superimposed. The superimposed harmonics on the HVDC may have synergistic effects and may lead to further degradation in the cable insulation. Previous research has shown that partial discharge was the main cause of degradation in polymeric insulation under AC stress. However, few publications have demonstrated the effect of combined stress on cable insulation degradation. Additionally, the most popular cable insulation material, cross-linked polyethylene (XLPE), cannot be recycled. Alternative materials which can be recycled have been proposed and one such solution could be thermoplastic materials. In this study, HDPE was investigated as a reference material for thermoplastics and their potential use as insulation in HVDC cables. In this paper the effect of frequency on HDPE degradation under superimposed stresses was studied using the following approaches; equivalent phase resolved partial discharge (PRPD) plots, fourier transform infrared spectroscopy -attenuated total reflection (FTIR-ATR) and dielectric spectroscopy (DS) measurements were carried out. The results show that during aging and with a frequency increase, the voltage of PD events increased which in turn created more polar molecule groups on the surface. The amount of polar molecule groups was found to affect ε' and tanδ, with both increasing when more polar molecules were created. The results show that applying a higher AC frequency enhances polymer degradation.

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“…On the other hand, the discharge magnitude is greater when the semicon wall in the void is negative [17]. However, unlike the observations in [17,20], the findings of [21] suggested that negative PDs have higher D m as compared to positive PDs. The defects studied in the same reference were of different type at the termination of the MV High-density Cross-linked Polyethylene (XLPE) cable, but still involved the outer semicon layer and the insulation.…”

Section: Pd Initiationmentioning

confidence: 62%

Impact of DC Voltage Enhancement on Partial Discharges in Medium Voltage Cables—An Empirical Study with Defects at Semicon-Dielectric Interface

et al. 2017

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Abstract:A scientific consensus is emerging on the benefits of direct current (DC) distribution in medium voltage (MV) power systems of ships and cities. At least 50% space savings and increased power transfer capacity are estimated with enhanced voltage DC operation of electric cables. The goal of this research is to contribute to developing the empirical knowledge on the insulation performance in order to validate the feasibility of such anticipated gains of DC versus alternating current (AC), and to determine the comparative impact of different operational conditions from a component engineering point of view. The partial discharge (PD) activity in cables is measured under AC and DC conditions as an indicator of insulation performance. Specifically, PDs in defects at the semicon-insulation interface are studied in terms of inception voltage, repetition rate and discharge magnitude. Empirical understanding is drawn for operating voltage and frequency dependence of the discharge behavior in such voids in the range of 10 to 20 kV and 0 to 0.1 Hz, respectively. The change in PD activity with void evolution post temperature-induced ageing process is explored.

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Partial discharge characterization of cross-linked polyethylene medium voltage power cable termination defects at very low frequency (0.1 Hz) and power frequency test voltages

Cited by 38 publications

References 15 publications

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

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

Assessment of HDPE aged under DC voltage combined with AC harmonic stresses of various frequencies

Impact of DC Voltage Enhancement on Partial Discharges in Medium Voltage Cables—An Empirical Study with Defects at Semicon-Dielectric Interface

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