Effect of silicone grease on electrical tree degradation of silicon rubber under AC electric field

Liao, Yanqun; Yang, Kai; Yan, Zhimin; Yang, Xu; Li, Jianying; Yu, Xin

doi:10.1007/s10854-020-03183-3

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…The tensile stress also causes the molecular chains to move along the direction of force, increasing the distance between the molecular chains, increasing the free volume, and the energy transferred by charge transport in the free volume increases. At the same time, the energy barrier between molecular chains decreases, which is conducive to the transport of charges, and the damage of carrier on the molecular chain structure is strengthened [44][45][46]. This easily forms electric field distortion and triggers partial discharge, promoting the degradation of the insulation medium molecular chain, showing an increase in the degradation area of the electric tree and rapid growth of the electric tree.…”

Section: Breakdown Degradation Of Samples Before and After Addition O...mentioning

confidence: 99%

Effect of nucleating agents on the electrical properties of cross‐linked polyethylene under tensile stress

Xing,

Liu,

et al. 2023

High Voltage

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During the operation of high‐voltage cables, external stress and residual stress can affect the aggregated structure of insulating materials and lead to significant deterioration in their electrical performance. To investigate the evolution characteristics of the electrical properties of cross‐linked polyethylene (XLPE) under mechanical stress, this paper explains the relationship between the aggregated structure of XLPE and its electrical properties and proposes a method for improving insulation performance under mechanical stress. The results show that metallocene polyethylene used as a nucleating agent can promote crystallisation through heterogeneous nucleation and increase Young's modulus by non‐uniform nucleation, increasing crystallinity and reducing interplanar spacing, resulting in more complete crystal forms and reduced damage to the aggregated structure during the tensile process. After nucleating agent modification, the XLPE crystallisation becomes more uniform, and interfacial adhesion forces increase. The weakened interface damage process between the amorphous and crystalline regions under tensile stress effectively inhibits the process of molecular chain polarisation turning and reduces trap density. The modified XLPE crystal structure shows a tendency towards densification and enhanced molecular chain interactions, which can reduce the damage to the aggregated structure under tensile stress, while the reduced free volume inside the material and the shortened average free path of carriers can weaken the damage of high‐energy electrons to molecular chains, thereby inhibiting the process of electrical tree degradation. The results show that nucleating agents have great potential for maintaining the stable operation of XLPE cables under mechanical stress.

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Section: Breakdown Degradation Of Samples Before and After Addition O...mentioning

confidence: 99%

Effect of nucleating agents on the electrical properties of cross‐linked polyethylene under tensile stress

Xing,

Liu,

et al. 2023

High Voltage

View full text Add to dashboard Cite

show abstract

Enhancement in Electrical Properties of Impact Polypropylene Copolymer for Cable Insulation Induced by Rapid Cooling

Yang

Ren

Jing

et al. 2023

IEEE Trans. Dielect. Electr. Insul.

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Effect of silicone grease on electrical tree degradation of silicon rubber under AC electric field

Cited by 2 publications

References 17 publications

Effect of nucleating agents on the electrical properties of cross‐linked polyethylene under tensile stress

Effect of nucleating agents on the electrical properties of cross‐linked polyethylene under tensile stress

Enhancement in Electrical Properties of Impact Polypropylene Copolymer for Cable Insulation Induced by Rapid Cooling

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