High Magnetic Field Affecting Dielectric Polarization and Partial Discharge Behavior of Epoxy Resin

Wang, M. Y.; Du, B. X.; Kong, Xiaoxiao; Liang, Hucheng; Ma, Yanwei

doi:10.1109/tdei.2022.3183669

Cited by 4 publications

(16 citation statements)

References 20 publications

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“…PD behavior was tested using the same experimental setup as that used in AC breakdown tests and was detected by a high-frequency current transformer (HFCT) being connected to a high-resolution oscilloscope and surrounding the ground line as described in [13], [15], [16]. 5 kV AC voltage was applied to the specimens for 1 minute, and PDs whose amplitudes of the signals were higher than 200 mV were recorded.…”

Section: Figure 2 Experimental Setup For Partial Discharge and Breakd...mentioning

confidence: 99%

“…PD behaviors are related to the polarization and depolarization process of the polymer insulation material as described in [13], [16]. In order to analyze the effects of high magnetic field on the dielectric properties of SiR/Fe3O4 nanocomposites, a model is established and shown in Fig.…”

Section: A Effects Of Nanoparticles On Breakdownmentioning

confidence: 99%

“…High magnetic field has been proved to be able to cause variation of dielectric properties [13] and promote partial discharge, deterioration [13]- [15], and breakdown [16] process of insulation material. Effects of high magnetic field on the electrons of polymer molecular chain result in energy level splitting, which is known as Zeeman effects [17].…”

Section: Introductionmentioning

confidence: 99%

“…The larger amount of charge injection and space charge accumulation in high magnetic field increases the possibility of partial discharge (PD) and results in lower DC breakdown strength of insulation material [16]. The conversion between electromagnetic energy and dielectric polarization energy in high magnetic field leads to the variation of dielectric polarization process [13]. Inhibition effects on polarization cause lower amplitude and higher speed of polarization [13]- [15], resulting in the decrease of calculated permittivity and the increase of PD frequency in high magnetic field.…”

Section: Introductionmentioning

confidence: 99%

“…The conversion between electromagnetic energy and dielectric polarization energy in high magnetic field leads to the variation of dielectric polarization process [13]. Inhibition effects on polarization cause lower amplitude and higher speed of polarization [13]- [15], resulting in the decrease of calculated permittivity and the increase of PD frequency in high magnetic field. As a result, electrical trees are more easily to be initiated and spread quickly toward the ground in insulation material under AC voltage [14]- [16].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Ferromagnetic Nanoparticles and Fluorination on Breakdown of SiR/Fe₃ O₄ Nanocomposites in High Magnetic Field

Wang¹,

Zhang²,

Xue³

et al. 2023

IEEE Access

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High magnetic field causes premature failure of insulation. In order to improve the breakdown strength of silicone rubber (SiR), different filler contents of ferroferric oxide (Fe3O4) nanoparticles were added. Experimental results show that 1 wt% addition amount of ferromagnetic nanoparticles is beneficial to improve the AC breakdown strength of SiR by 5.40% in 12 T magnetic field due to their ability to regulate dielectric polarization and partial discharge (PD) behavior, resulting from the relative higher permittivity and permeability of Fe3O4. Magnetization of Fe3O4 nanoparticles results in 3.33% decrease of DC breakdown strength with 2 wt% filler content in 12 T magnetic field. Fluorination treatment was carried out and proved to be able to improve the DC breakdown strength of SiR/Fe3O4 nanocomposites by 8.84% in 12 T magnetic field with the treatment time being 5 minutes, resulting from the regulation of surface traps. Fluorination treatment weakened the magnetism of nanoparticles, weakening their regulation on insulation polarization and PD. Adding an appropriate amount of ferromagnetic nanoparticles before the fluorination of SiR/Fe3O4 nanocomposites can improve the AC and DC breakdown strength by 0.64% and 8.81% respectively at the same time in high magnetic field.

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Section: Figure 2 Experimental Setup For Partial Discharge and Breakd...mentioning

confidence: 99%

Section: A Effects Of Nanoparticles On Breakdownmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Ferromagnetic Nanoparticles and Fluorination on Breakdown of SiR/Fe₃ O₄ Nanocomposites in High Magnetic Field

Wang¹,

Zhang²,

Xue³

et al. 2023

IEEE Access

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Electrical Treeing and Its Suppression Method of SiR in High Magnetic Field

Wang¹,

Yin²,

Wang³

et al. 2023

IEEE Access

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This paper investigates the effects of high magnetic field on electrical treeing of silicone rubber (SiR). Experimental results show that electrical trees are more easily to be initiated and spread further along the direction of electric field under the effects of high magnetic field. When the direction of high magnetic field is perpendicular to that of electric field, magnetic field with higher magnetic flux density also results in larger accumulated damage area. Splitting of energy band structure and changes in polarization characteristics result in a lower interface barrier and more serious partial discharge, thus causing the weakened resistance to electrical treeing in high magnetic field. Based on the insulation degradation mechanism, SiR was modified by adding ferroferric oxide (Fe 3 O 4 ) nanoparticles to improve its insulation performance in high magnetic field. Moderate addition amount of Fe 3 O 4 nanoparticles is proved to be able to suppress electrical treeing in high magnetic field by forming quantum dots, modifying polarization properties and partial discharge behavior. Excessive addition of Fe 3 O 4 nanoparticles has negative effects on suppressing electrical treeing due to the magnetization of the nanocomposites.INDEX TERMS Magnetic field, electrical tree, nanocomposites, quantum dot.

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Trends in Diagnostics and Monitoring of High-Voltage Insulation

Biswas,

Du,

Florkowski

et al. 2024

IEEE Electr. Insul. Mag.

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High Magnetic Field Affecting Dielectric Polarization and Partial Discharge Behavior of Epoxy Resin

Cited by 4 publications

References 20 publications

Effects of Ferromagnetic Nanoparticles and Fluorination on Breakdown of SiR/Fe₃ O₄ Nanocomposites in High Magnetic Field

Effects of Ferromagnetic Nanoparticles and Fluorination on Breakdown of SiR/Fe₃ O₄ Nanocomposites in High Magnetic Field

Electrical Treeing and Its Suppression Method of SiR in High Magnetic Field

Trends in Diagnostics and Monitoring of High-Voltage Insulation

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High Magnetic Field Affecting Dielectric Polarization and Partial Discharge Behavior of Epoxy Resin

Cited by 4 publications

References 20 publications

Effects of Ferromagnetic Nanoparticles and Fluorination on Breakdown of SiR/Fe3 O4 Nanocomposites in High Magnetic Field

Effects of Ferromagnetic Nanoparticles and Fluorination on Breakdown of SiR/Fe3 O4 Nanocomposites in High Magnetic Field

Electrical Treeing and Its Suppression Method of SiR in High Magnetic Field

Trends in Diagnostics and Monitoring of High-Voltage Insulation

Contact Info

Product

Resources

About

Effects of Ferromagnetic Nanoparticles and Fluorination on Breakdown of SiR/Fe₃ O₄ Nanocomposites in High Magnetic Field

Effects of Ferromagnetic Nanoparticles and Fluorination on Breakdown of SiR/Fe₃ O₄ Nanocomposites in High Magnetic Field