Thickness dependence of space charge in XLPE and its nanocomposites under temperature gradient

Lv, Zepeng; Wu, Kai; Wang, Xia; Zhao, Xu; Dissado, L.A.; Niu, Yuhan

doi:10.1109/icsd.2013.6619895

Cited by 5 publications

(9 citation statements)

References 9 publications

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“…Findings of [26][27][28] suggest that μm range thickness may not affect the space charge profile and breakdown time of LDPE nanocomposites at room temperature. Similarly, XLPE nanocomposites under isothermal condition (both electrodes at the temperature of 20°C) exhibit very little variation in space charge profile (shown by the dotted red line) [29]. However, under the temperature gradient condition marginal variation is observed.…”

Section: Space Chargementioning

confidence: 93%

Space charge and conductivity measurement of XLPE nanocomposites for HVDC insulation–permittivity as a nanofiller selection parameter

Sharad

Kannaiah

Ahmad

et al. 2018

IET Science, Measurement & Technology

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Section: Space Chargementioning

confidence: 93%

Space charge and conductivity measurement of XLPE nanocomposites for HVDC insulation–permittivity as a nanofiller selection parameter

Sharad

Kannaiah

Ahmad

et al. 2018

IET Science, Measurement & Technology

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“…Additionally degassing reduces the space charge accumulation [88]. Apart from degassing temperature conditions, the space charge formation is also dependent on the thickness of insulation under temperature gradient condition [93]. Other important findings in the field of PE nanocomposites and other nanocomposites are tabulated in Table 4 and Table 5 respectively.…”

Section: Other Dielectric Propertiesmentioning

confidence: 97%

A Review on Nanocomposite Based Electrical Insulations

Paramane¹,

Kumar²

2016

Transactions on Electrical and Electronic Materials

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The potential of nanocomposites have been drawing the intention of the researchers from energy storage to electrical insulation applications. Nanocomposites are known to improve dielectric properties, such as the increase in dielectric breakdown strength, suppressing the partial discharge (PD) as well as space charge, and prolonging the treeing, etc. In this review, different theories have been established to explain the reactions at the interaction zone of polymer matrix and nanofiller; the characterization methods of nanocomposites are also presented. Furthermore, the remarkable findings in the fields of epoxy, cross-linked polyethylene (XLPE), polypropylene and polyvinyl chloride (PVC) nanocomposites are reviewed. In this study, it was observed that there is lack of comparison between results of lab scale specimens and actual field aged cables. Also, non-standardization of the preparation methods and processing parameters lead to changes in the polymer structure and its surface degradation. However, on the positive side, recent attempt of 250 kV XLPE nanocomposite HVDC cables in service may deliver a promising performance in the coming years. Moreover, materials such as self-healing polymer nanocomposites may emerge as substitutes to traditional insulations.

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“…Space charge accumulation in polymer cables insulation is closely related to the intensity of the electric field and the concentration of potential pits [111,164], the values of the free volume contained by them [165], the nature and states of the electrodes [154], the insulation dimensions [166] and the temperature gradient [167].…”

Section: Space Charge In Nanocompositesmentioning

confidence: 99%

“…Research performed by Zheng et al on LDPE/MgO nanocomposites showed that the space charge distribution improved and the decay rate of space charge increased with rising temperature [181]. The influence of the samples’ height and temperature gradient on the space charge accumulation in nanocomposites based on PE was analyzed by Chen et al [167], Lv et al [166] and Wu et al [182]. Chen employed LDPE samples, while Lv was applying XLPE samples with 1 wt % of SiO 2 fillers.…”

Section: Space Charge In Nanocompositesmentioning

confidence: 99%

“…For the XLPE/SiO 2 nanocomposites, a correlation of the space charge density and the samples’ heights was observed: In the case of thin samples, heterocharges accumulated but their density decreased with the increase in samples’ heights. XLPE/SiO 2 nanocomposites showed a more pronounced correlation of samples’ heights with the heterocharge density than unfilled XLPE under temperature gradients [166]. The influence of the nanoparticles’ size on space charge was studied by Wu et al [183] on samples of LDPE/SiO 2 .…”

Section: Space Charge In Nanocompositesmentioning

confidence: 99%

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Polyethylene Nanocomposites for Power Cable Insulations

et al. 2018

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This review represents a comprehensive study of nanocomposites for power cables insulations based on thermoplastic polymers such as polyethylene congeners like LDPE, HDPE and XLPE, which is complemented by original results. Particular focus lies on the structure-property relationships of nanocomposites and the materials’ design with the corresponding electrical properties. The critical factors, which contribute to the degradation or improvement of the electrical performance of such cable insulations, are discussed in detail; in particular, properties such as electrical conductivity, relative permittivity, dielectric losses, partial discharges, space charge, electrical and water tree resistance behavior and electric breakdown of such nanocomposites based on thermoplastic polymers are described and referred to the composites’ structures. This review is motivated by the fact that the development of polymer nanocomposites for power cables insulation is based on understanding more closely the aging mechanisms and the behavior of nanocomposites under operating stresses.

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Thickness dependence of space charge in XLPE and its nanocomposites under temperature gradient

Cited by 5 publications

References 9 publications

Space charge and conductivity measurement of XLPE nanocomposites for HVDC insulation–permittivity as a nanofiller selection parameter

Space charge and conductivity measurement of XLPE nanocomposites for HVDC insulation–permittivity as a nanofiller selection parameter

A Review on Nanocomposite Based Electrical Insulations

Polyethylene Nanocomposites for Power Cable Insulations

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