Accelerated aging study on 15 kV XLPE and EPR cables insulation caused by switching impulses

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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“…In the past, the aging study of EPR cables under many different conditions has been carried out [5,16]. Tab.…”

Section: Analysis Of Measurement Datamentioning

confidence: 99%

“…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%

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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“…The cross-linked polyethylene (XLPE) and ethylene propylene rubber (EPR) are the most commonly used materials for polymeric power cable insulation [8][9].…”

Section: B Xlpe and Epr Cable Under Electrical Stressmentioning

confidence: 99%

“…Ambient temperature during the experiment was maintained at 20˚C. In the experiment, the cable samples were aged by the specific number of impulses [8][9][10][11][12]. [7].…”

Section: ) Details Of the Tested Cable Samples: The Mississippimentioning

confidence: 99%

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Tools and dielectric requirements for the design of marine cabling systems

Mazzola

Card

Grzybowski

et al. 2013

2013 IEEE Electric Ship Technologies Symposium (ESTS)

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This paper explores various power cable challenges for notional electric ship applications including future technology trends for shipboard power cables. To meet the demands of an "all electric ship," the cabling requirements of the design are not a trivial issue which can result in significant error in estimating final size, weight, and cost at time of construction along with costly failures and early repairs that impact lifecycle cost. This paper provides information on the development of a design tool known as a "Generic Cable Calculator" to estimate parameters such as impedances, weights, and bending radii for ship power cabling. Analysis of actual experience in designing ship cabling suggests improvements in early design tools needed to capture additional requirements in terms of grounding, shielding, and satisfying current standards for cables used in the variable frequency drive train. Also addressed are results specific to future trends of cable insulation and future standards.

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