A Review of Possible Methods for Defining Tree Retardant Crosslinked Polyethylene (TRXLPE)

Pélissou, S.; Bristol, R.; Densley, J.; Fletcher, C.; Katz, C.; Kuchta, FD Frank-Dieter; Kung, D.; Person, Tim; Smalley, M. V.; Smith, Jim Q.

doi:10.1109/mei.2008.4635658

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…In actual operation, water tree aging of XLPE insulation materials is a very slow process, and may take a couple of years or decades. Therefore, accelerated aging tests are adopted by most of the cable manufacturers and users to assess the performance of WTR-XLPE insulation materials [9]. The most common method is by creating defects using a water needle electrode which can provide local high electric field and water for water tree initiation and directly cultivate water trees.…”

Section: Introductionmentioning

confidence: 99%

Research on the water blade electrode method for assessing water tree resistance of cross-linked polyethylene

Zhang

Nie

et al. 2016

Polymer Testing

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A new water blade electrode method is presented to accelerate water tree initiation and propagation in cross-linked polyethylene (XLPE) insulation, and the validity was verified by a series of experiments. Water tree morphology and length over time were monitored using a polarized light microscope and compared to the results through the conventional water needle electrode method. The influence of electric field distribution along the water electrodes on water tree initiation and morphology was also investigated on the basis of experimental data and finite element simulation. Furthermore, the effect of voltage frequency on water tree initiation was also investigated. It was found that the water blade electrode method could greatly accelerate water tree initiation and propagation and it was more convenient to slice XLPE for observation. The high frequency voltage could more efficiently facilitate water tree initiation and propagation.

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Section: Introductionmentioning

confidence: 99%

Research on the water blade electrode method for assessing water tree resistance of cross-linked polyethylene

Zhang

Nie

et al. 2016

Polymer Testing

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“…For paper and XLPE insulated power cables, the thermal aging generates a structural and chemical irreversible change and this aging mechanism affects the lifetime of the entire power cable [1]. The problem of thermal endurance characterization for different types of power cables is still under debate [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis of underground power cables-A monitoring procedure

Mariut

Helerea

Lungoci

et al. 2012

2012 International Conference on Applied and Theoretical Electricity (ICATE)

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The implementation of underground power distribution lines grown significantly over the last decades and this has increased to need to obtain a high level of operational reliability. Current monitoring strategies for underground power lines are developed based on different diagnosis tools and many of them are not cheap at all. As an example, traditional methods of thermal endurance characterization for XLPE insulated power cables are all based on analytical tools-infrared carbonyl absorbance, melting point, differential scanning calorimetry and others. These diagnosis techniques are either too time consuming or some can only give vague data that cannot be interpreted. The current paper proposes a new method for underground power cable monitoring based on cable historical operation temperature. Based on the current study, the aim of this innovative monitoring procedure is to estimate the degree of ageing for an underground power cable considering thermal stresses. Different parameters related to thermal aging are determined such as daily thermal aging and the average daily rate of aging. The input data considered for the current researches are chosen arbitrarily, but it can be switched with real data from exploitation. For thermal lifetime estimation, the thermal endurance profile for XLPE was applied. The current procedure can be applied either paper insulated or XLPE insulated power cables.

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