Nanoscale-trap-modulated electrical degradation in polymer dielectric composites using antioxidants as voltage stabilizers

Su, Jingang; Du, B. X.; Han, Tao; Li, Jin; Li, Zhonglei; Xiao, Meng

doi:10.1016/j.compositesb.2019.107434

Cited by 20 publications

(16 citation statements)

References 36 publications

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“…4. Su et al [10] have clearly indicated that addition of antioxidants to the polymers has significant influence on charge trapping characteristics to enhance the lifetime of the insulation structure. It is noted that the trap energy level of the pure silicone sample lies in the range from 0.8 to 1 eV.…”

Section: Resultsmentioning

confidence: 99%

“…The evident dipoles of nanoparticles build positive and negative potential wells in pairs, which capture carriers as the electrons and hole traps [9]. Su et al [10] studied the electrical degradation of EPDM and observed that addition of antioxidant can enhance efficient charge traps between the conduction and valence bands. Hence, studying the surface potential decay behaviour provides a convenient way to understand the surface trap characteristics of a material.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of space charge and charge trap characteristics of gamma irradiated silicone rubber nanocomposites

Thangabalan

Sarathi

Harid

et al. 2020

IET Nanodielectrics

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Silicone rubber is widely used for electrical insulation and may be exposed to a harsh environment. The present study envisaged to improve insulation properties of silicone rubber by adding an optimised quantity of nanofillers. The fundamental space charge and charge trap characteristics were studied by adopting the pulsed electroacoustic analysis technique and through surface potential measurement. The dielectric properties of the materials were analysed through measurement of permittivity and loss factor of the material at different frequencies and temperatures. The influence of gamma irradiation on variations in fundamental properties of the material was characterised. The results of the study indicate that 5 wt.% alumina added nanocomposites had better space charge performance under gamma irradiation compared with virgin silicone rubber.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of space charge and charge trap characteristics of gamma irradiated silicone rubber nanocomposites

Thangabalan

Sarathi

Harid

et al. 2020

IET Nanodielectrics

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“…The higher charge regulation performance can reduce the electrical tree initiation probability as shown in Fig. 16, which is of substantial significance for enhancing the reliability of insulation materials in the future power grids [88].…”

Section: Organic Additivesmentioning

confidence: 99%

“…Oxidative degradation process of polymeric insulation materials and roles of antioxidant, UV absorber, and light stabiliser[81] Electron trap distribution of EPDε with different antioxidants[88] …”

mentioning

confidence: 99%

Electrical tree degradation in high‐voltage cable insulation: progress and challenges

Su¹,

2020

High Voltage

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High‐voltage direct current (HVDC) and high‐voltage alternating current (HVAC) cables are the most important equipment for high‐voltage, large‐capacity and long‐distance power transmission. Electrical tree is a pre‐breakdown phenomenon leading to failure of insulation materials, and it is the major issue that threatens the safe and stable operation of HVDC and HVAC cable systems. This study summarises and analyses the achievements in the research of electrical tree for HVDC and HVAC cables. The initiation mechanisms of the electrical tree, including Maxwell electro‐mechanical stress, charge injection–extraction, charge trapping and electroluminescence theories, are elaborated for fully understanding the electrical degradation process in insulation materials. Then, the influences of the high electric field, high temperature and mechanical stress on electrical tree behaviours are discussed, and the relationship between charge transport and the electrical tree is analysed and illustrated. The suppression methods of the electrical tree are put forward by introducing inorganic and organic additives into insulation materials, and the suppression mechanisms are presented from the viewpoints of the structure‐property and microscale–macroscale relationships. Recently, the electrical tree research studies are focused on the high‐precision of initiation models, high‐dependence of multi‐physical fields and high‐efficiency of suppression methods. The achievements provide theoretical support for improving the electrical performance of insulation materials, while it is a practical problem to explore their application feasibility in HVDC and HVAC cable.

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“…So far, two kinds of important methods that have been proposed to enhance the breakdown field strength of polymers have mainly focused on the incorporation of nanofillers and voltage stabilizers. 15 − 18 It has been reported that the mechanism by which low content nanofillers (such as TiO 2 , 19 , 20 MgO, 21 , 22 and Al 2 O 3 23 , 24 ) can improve the breakdown strength of polymer is mainly attributed to two ways: (1) the tortuous path of electron breakdown caused by nanofillers. 25 , 26 (2) Nanofillers capture electrons by introducing deep traps into the polymer ( Figure 1 b).…”

Section: Introductionmentioning

confidence: 99%

Voltage-Stabilizer-Grafted SiO₂ Increases the Breakdown Voltage of the Cycloaliphatic Epoxy Resin

et al. 2021

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Cycloaliphatic epoxy (CE) resin plays a vital role in insulation equipment due to its excellent insulation and processability. However, the insufficient ability of CE to confine electrons under high voltage often leads to an electric breakdown, which limits its wide applications in high-voltage insulation equipment. In this work, the interface effect of inorganic nano-SiO 2 introduces deep traps to capture electrons, which is synergistic with the inherent ability of the voltage stabilizer m -aminobenzoic acid ( m -ABA) to capture high-energy electrons through collision. Therefore, the insulation failure rate is reduced owing to doping of the functionalized nanoparticles of the m -ABA-grafted nano-SiO 2 ( m -ABA-SiO 2 ) into the CE. It is worth noting that the breakdown field strength of this m -ABA-SiO 2 /CE reaches 53 kV/mm, which is 40.8% higher than that of pure CE. In addition, the tensile strength and volume resistivity of m -ABA-SiO 2 /CE are increased by 29.1 and 140%, respectively. Meanwhile, the glass transition temperature was increased by about 25 °C and reached 213 °C. This work proves that the comprehensive performance of CE-based nanocomposites is effectively improved by m -ABA-SiO 2 nanoparticles, showing great application potential in high-voltage insulated power equipment.

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Nanoscale-trap-modulated electrical degradation in polymer dielectric composites using antioxidants as voltage stabilizers

Cited by 20 publications

References 36 publications

Analysis of space charge and charge trap characteristics of gamma irradiated silicone rubber nanocomposites

Analysis of space charge and charge trap characteristics of gamma irradiated silicone rubber nanocomposites

Electrical tree degradation in high‐voltage cable insulation: progress and challenges

Voltage-Stabilizer-Grafted SiO₂ Increases the Breakdown Voltage of the Cycloaliphatic Epoxy Resin

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Nanoscale-trap-modulated electrical degradation in polymer dielectric composites using antioxidants as voltage stabilizers

Cited by 20 publications

References 36 publications

Analysis of space charge and charge trap characteristics of gamma irradiated silicone rubber nanocomposites

Analysis of space charge and charge trap characteristics of gamma irradiated silicone rubber nanocomposites

Electrical tree degradation in high‐voltage cable insulation: progress and challenges

Voltage-Stabilizer-Grafted SiO2 Increases the Breakdown Voltage of the Cycloaliphatic Epoxy Resin

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Product

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Voltage-Stabilizer-Grafted SiO₂ Increases the Breakdown Voltage of the Cycloaliphatic Epoxy Resin