A Comparative Study on the Insulation Ageing of 10 kV XLPE Cable via Accelerated Electrical Test and Accelerated Water Tree Test

Li, Weiwei; Zheng, Wenyue; Ren, Lulu; Li, Huan; Zhao, Xuetong; Wang, Can; Li, Jianying

doi:10.1007/s42835-021-00817-2

Cited by 13 publications

(7 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of IR spectroscopy to monitor non-thermal decomposition and chemical alterations of materials involve the study of UV aging of asphalt involving carbon nanotubes/polystyrene composite, 370 as well as alterations of microplastics, 371 discharge-initiated decomposition of SF6, 372 and environmental degradation of various real-world materials. 373,374 The experiments in transmission mode usually require the use of alkaline halogenide matrix materials, most commonly KBr. However, in some cases such a matrix can influence the sample, thus one should always take into account this possibility and critically consider the obtained results.…”

Section: Other Chemical Processesmentioning

confidence: 99%

Section: Other Chemical Processesmentioning

confidence: 99%

See 1 more Smart Citation

Infrared spectroscopic monitoring of solid-state processes

Biliškov

2022

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

Section: Other Chemical Processesmentioning

confidence: 99%

Section: Other Chemical Processesmentioning

confidence: 99%

Infrared spectroscopic monitoring of solid-state processes

Biliškov

2022

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…Li, W.W. et al. [8] performed accelerated water‐tree tests of different lengths of time on a 10 kV XLPE cable, leading to more serious degradation for XLPE insulating materials. Zhou, K. et al.…”

Section: Introductionmentioning

confidence: 99%

“…To date, extensive research has been conducted on the factors that affect the ageing of water trees in XLPE cable insulation, including ageing time, voltage frequency, mechanical stress, solution concentration and temperature. Li, W.W. et al [8] performed accelerated water-tree tests of different lengths of time on a 10 kV XLPE cable, leading to more serious degradation for XLPE insulating materials. Zhou, K. et al [9] claimed that water-tree growth of XLPE under temperature cycling conditions would have a deceleration-acceleration cycle.…”

Section: Introductionmentioning

confidence: 99%

Study on the water‐tree ageing characteristics of polyethylene/organic montmorillonite and crosslinked polyethylene/organic montmorillonite nanocomposites

Yang²,

Wang

et al. 2022

High Voltage

View full text Add to dashboard Cite

The dispersion state of nanoparticles affects the properties of composites, and the crosslinking process of polymers affects the dispersion state of nanoparticles. In order to investigate the effects of crosslinking behaviour on the water-tree ageing characteristics of nanocomposite dielectrics at the molecular level, polyethylene/organic-montmorillonite (PE/organic montmorillonite (OMMT)) and crosslinked polyethylene/organic-montmorillonite (XLPE/OMMT) nanocomposites were prepared by the melt blending method, after which the accelerated water-tree ageing experiments were conducted using a needle electrode. Fourier transform infrared spectroscopy, differential scanning calorimetry, successive self-nucleation annealing and scanning electron microscope (SEM) tests were conducted to characterise the properties of the samples before and after watertree ageing. The results indicate that the initiation probability and the length of water trees in XLPE/OMMT are less than those in PE/OMMT. The carbonyl index in the watertree area of the two nanocomposites increases, indicating that the water-tree ageing is the result of electrochemical degradation. The crystallisability of the water-tree area degrades, decreasing the crystallinity and the lamellar thickness. The growth of water trees destroys molecular chains and crystal structures, which results in local cracks. There are many holes for the water tree growth in the PE/OMMT specimen. However, the crosslinked meshwork not only restricts the movement of macromolecular chains but also increases the stability of the lamellar barrier effect of OMMT. The combination of the two effects significantly improves the water-tree resistance of the XLPE/OMMT nanocomposite.

show abstract

“…Polymeric materials are often used as insulation materials in cables in high-voltage applications. As one of the most widely used polyethylenes (PE) [3][4][5], the aging and electrical properties of cross-linked polyethylene (XLPE) are of great concern [6][7][8][9]. Compared to PE, PP has a relatively high melting temperature that might possibly facilitate higher current-carrying capacity in addition to other micro-structure properties, such as crystallinity, amorphous phase, as well as crystalline/amorphous interface [10].…”

Section: Introductionmentioning

confidence: 99%

Electrical Property of Polypropylene Films Subjected to Different Temperatures and DC Electric Fields

et al. 2021

View full text Add to dashboard Cite

A polypropylene (PP) film is usually used as a dielectric material in capacitors as well as cables. However, PP films may degrade because of the combined effect of temperature and electric field. In an earlier study, plain PP films and PP films loaded with nano-metric natural clay were studied under sinusoidal (AC) electric fields at power frequency and temperatures above the ambient. To better understand the electrical characteristics of PP film under various conditions, the objective of this study is to determine the time-to-breakdown of the plain PP and PP filled with 2% (wt) natural nano-clay when subjected to time-invariant (DC) electric fields at elevated temperatures. In order to achieve this objective, the effects of uniform as well as non-uniform electric fields were compared at the same temperature for the PP film. In this study, experimental results indicated that the time-to-breakdown of all PP films, plain or filled with nano-clay, decreases with the increase in electric field intensity, non-uniformity of the electric field, and temperature. It was also found that the time-to-breakdown of PP film filled with 2% (wt) natural nano-clay under DC electric field is longer and less sensitive to temperature. Furthermore, when compared with the results under the uniform electric field, PP film filled with 2% (wt) nano-metric natural clay indicates shorter time-to-failure under non-uniform DC electric fields. Finally, the morphology of the samples was observed by digital camera, optical micrography, and SEM, to better understand the mechanism of the breakdown.

show abstract

A Comparative Study on the Insulation Ageing of 10 kV XLPE Cable via Accelerated Electrical Test and Accelerated Water Tree Test

Cited by 13 publications

References 31 publications

Infrared spectroscopic monitoring of solid-state processes

Infrared spectroscopic monitoring of solid-state processes

Study on the water‐tree ageing characteristics of polyethylene/organic montmorillonite and crosslinked polyethylene/organic montmorillonite nanocomposites

Electrical Property of Polypropylene Films Subjected to Different Temperatures and DC Electric Fields

Contact Info

Product

Resources

About