Electrical and Electro-Chemical Treeing Effect in Polyethylene and Crosslinked Polyethylene Cables

Bahder, G.; Katz, C.; Lawson, J. H.; Vahlstrom, W.

doi:10.1109/tpas.1974.294017

Cited by 90 publications

(20 citation statements)

References 9 publications

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“…Partial discharges initiated in amorphous regions lead to degradation due to treeing [6]. If the insulation layer came in contact with water or other chemicals, accelerated aging would be triggered as a result of the formation of electrochemical trees [7]. Factors such as electrical field and temperature had synergistic relation.…”

Section: Introductionmentioning

confidence: 99%

Electrical aging phenomena of medium voltage EPR cable energized by ac voltage with switching impulses superimposed

Cao

Zanwar

Grzybowski

2011

2011 IEEE Electric Ship Technologies Symposium

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Electrical aging of polymer insulated power cables has been an important subject of investigation in the last several decades. Cable insulation is placed under heavy electrical stress due to overvoltages occurring during switching operations taking place in the power system. Transients overriding the normal ac operation voltage are some of the most hazardous conditions for cable insulation life. Although a good understanding of aging mechanisms under single stress has been achieved, more research work is needed to fully grasp the phenomena taking place under multi-stress conditions. In this study, the electrical aging of 15 kV Ethylene Propylene Rubber (EPR) power cables was undertaken by ac voltage with switching impulses superimposed in wet condition. The experiments aimed at providing a better understanding of the electrical aging phenomenon of EPR cable insulation in wet condition. It also helped to assess the reliability of EPR cables used under such circumstances.

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Section: Introductionmentioning

confidence: 99%

Electrical aging phenomena of medium voltage EPR cable energized by ac voltage with switching impulses superimposed

Cao

Zanwar

Grzybowski

2011

2011 IEEE Electric Ship Technologies Symposium

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“…The conclusions stated in this paper were that these trees were "electro-chemical [water trees] rather than electrical in nature," that they "had not been recognized previously," and that they "will develop only if water or other liquids are present in the insulation or in the insulation shield interface" [6]. Figure 6.…”

Section: An Unpleasant Realizationmentioning

confidence: 85%

“…It is not known when interesting turned to realization, but it was this writer's opinion that these papers and their conclusions (especially those in [6]) resulted in finally convincing most of the industry that a previously unknown and unanticipated phenomenon was occurring and was responsible for the premature cable failures and that installed cables, and probably those presently being installed, will fail prematurely. This was not pleasant to contemplate.…”

Section: An Unpleasant Realizationmentioning

confidence: 99%

The transition from paper-insulated, lead-covered cable to cross-linked polyethylene-insulated cable - a personal account

Lawson¹

2013

IEEE Electr. Insul. Mag.

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“…Another possible reason that contributes to the phenomenon is that all cable insulation is manufactured with imperfection [7,8,16]. The imperfections are the potential sites for the future partial discharges or electrical tree.…”

Section: Analysis Of Measurement Datamentioning

confidence: 99%

“…The temperature rise of the cables will generate amorphous regions in the insulation layers, where the partial discharges could occur, causing the further damages [7]. If the insulation layer is exposed to moisture or other chemicals, the treeing phenomena would come into existence [8] [9]. The failures of the insulation can be contributed to the synergetic effects between electrical stress and thermal stress in inhomogeneous regions [10].…”

Section: Introductionmentioning

confidence: 99%

Accelerated electrical aging of medium voltage EPR cables energized by elevated AC voltage with switching impulses superimposed

Cao

Grzybowski

Pradhan

2013

2013 IEEE Electric Ship Technologies Symposium (ESTS)

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Aging of polymer insulated power cables has been a significant subject of investigation during the last several decades. Despite the great achievements in single-stress aging mechanism, much less is known about the multi-stress aging and the associated phenomena. The cables will suffer from the electrical stress, thermal stress, mechanical stress, and other aging factors during the operation, which will initiate the unwanted aging of the cables. In the study, the accelerated electrical aging of Ethylene Propylene Rubber (EPR) cables was carried out. The 15 kV EPR cables were stressed by 3V 0 (26 kV) ac voltage with switching impulses superimposed. The ac current of ampacity (226 A) was applied to simulate the thermal stress at full load. The major objective of the study is to obtain a comprehensive understanding of the accelerated aging phenomena of EPR cable insulation and the impacts from different aging factors.

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Electrical and Electro-Chemical Treeing Effect in Polyethylene and Crosslinked Polyethylene Cables

Cited by 90 publications

References 9 publications

Electrical aging phenomena of medium voltage EPR cable energized by ac voltage with switching impulses superimposed

Electrical aging phenomena of medium voltage EPR cable energized by ac voltage with switching impulses superimposed

The transition from paper-insulated, lead-covered cable to cross-linked polyethylene-insulated cable - a personal account

Accelerated electrical aging of medium voltage EPR cables energized by elevated AC voltage with switching impulses superimposed

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