Nonlinear Materials Applied in HVDC Gas Insulated Equipment: From Fundamentals to Applications

Pan, Wenke; Ya, Wang; Ding, Hao; Shen, Enze; Zhang, Zhousheng; Yang, Xiao; Wang, Zezhong; Akram, Shakeel

doi:10.1109/tdei.2021.009631

Cited by 13 publications

(6 citation statements)

References 109 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Materials exhibiting nonlinear conductive behavior with elevated dielectric constants are also beneficial for capacitive field grading, which is regarded as another main class of field grading method, in addition to resistive field grading [ 45 ]. Dielectric properties of the FMP filled PEI films are demonstrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

Fe3O4 microplate filled PEI matrix composite with remarkable nonlinear conductive characteristics, dielectric property, and low percolation threshold

Wang,

2023

Heliyon

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Fe3O4 microplate filled PEI matrix composite with remarkable nonlinear conductive characteristics, dielectric property, and low percolation threshold

Wang,

2023

Heliyon

View full text Add to dashboard Cite

“…In this paper, the excellent performance of EPDM rubber is selected as the matrix, and three inorganic materials, SiC [17], copper calcium titanate (CCTO) [18], vanadium dioxide (VO 2 ) [19], with different electric field‐induced electrical conductivity characteristics are selected as the fillers, enabling the EPDM to have excellent non‐linear conductivity characteristics [20], as shown in Figure 1. In this study, the doping content of three kinds of fillers on the electrical performance of composites are investigated.…”

Section: Introductionmentioning

confidence: 99%

Non‐linear electrical conductivity of ethylene‐propylene‐diene monomer‐based composite dielectrics by tuning inorganic fillers

Zhang

et al. 2022

High Voltage

View full text Add to dashboard Cite

In this study, three kinds of inorganic fillers are chosen and filled into ethylene‐propylene‐diene monomer (EPDM) matrix, including silicon carbide, copper calcium titanate (CCTO), and vanadium dioxide (VO2). The electrical properties of the three modified composites at different temperatures have been systematically studied. The intrinsic conductance behaviours of different inorganic fillers on the direct current conductance and electric breakdown strength of the composite dielectrics are also analysed, and the possible mechanism for non‐linear conductivity is revealed. The electrical conductivity increases with the increase of fillers content, where 30 wt.% CCTO/EPDM composite dielectric has a high non‐linear coefficient of 5.71. The increase in temperature can further increase the conductivity of the composites, accompanying a lower breakdown strength. When the temperature rises to 70°C, the VO2/EPDM composite has a higher conductivity, but the electric breakdown strength degrades seriously. The simulation results show that the composites with non‐linear electrical conductivity characteristics can effectively uniform the electric field and solve the problem of electric field concentration at the root of the stress cone, which is beneficial to improving the safe operation of the cable accessories.

show abstract

“…They also have a large aspect ratio, i.e., 100−1000, and can easily form percolation at a low filler content, facilitating the electron field emission and formation of nonlinear conductivity characteristics, suppressing the electric field distortion. 20 Yang et al 21 investigated the application of the FDC material for suppressing the electric field distortion of the gas−solid interface on GIS/GIL insulators and proposed that both the nonlinear properties and other necessary characteristics in the specific application field should be considered. For the highvoltage power module, besides reducing the high electric stress, the issues of space-charge suppression and heat dissipation are also of significant concern.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Electric Field Distortion in High-Voltage Power Modules Utilizing Epoxy Resin/Silicon Carbide Whisker Composites with Field-Dependent Conductivity

Wang

Chen

Huang

et al. 2022

ACS Appl. Electron. Mater.

View full text Add to dashboard Cite

This paper reports the performance of an epoxy resin/silicon carbide whisker (EP/SiCw) composite (1–5 wt %) as the field-dependent conductivity (FDC) layer for electric field reduction in the high-voltage power module. The experiments consist of a field emission scanning electron microscope (FESEM), thermal conductivity, Fourier transform infrared (FT-IR) spectroscopy, thermally stimulated discharge current (TSDC), space charge, DC conductivity, and dielectric spectroscopy. The DC conductivity and dielectric spectroscopy are used for DC and AC stationary electric field simulations, respectively. The electric field reduction of EP/SiCw composites in the power module is analyzed, and the void defect in the FDC layer is also identified. The observed percolation threshold of the EP/SiCw composites is 3 wt %, and the DC electric field near the triple point decreases significantly by 74.8% under 10 kV when a 5 wt % EP/SiCw composite is applied for the FDC layer. It was found that the efficient threshold operating frequency of the FDC layer is around 10 kHz. The FDC layer can significantly reduce the electric field under AC voltage below 10 kHz. Although the power loss with the FDC layer increases obviously without the FDC layer, it is still lower than 1 W at 1 MHz, which is negligible for industrial applications. Notably, the void in the FDC layer is identified by the slowly increased dielectric loss with the increase of frequency through dielectric spectroscopy simulation.

show abstract

Nonlinear Materials Applied in HVDC Gas Insulated Equipment: From Fundamentals to Applications

Cited by 13 publications

References 109 publications

Fe3O4 microplate filled PEI matrix composite with remarkable nonlinear conductive characteristics, dielectric property, and low percolation threshold

Fe3O4 microplate filled PEI matrix composite with remarkable nonlinear conductive characteristics, dielectric property, and low percolation threshold

Non‐linear electrical conductivity of ethylene‐propylene‐diene monomer‐based composite dielectrics by tuning inorganic fillers

Tailoring Electric Field Distortion in High-Voltage Power Modules Utilizing Epoxy Resin/Silicon Carbide Whisker Composites with Field-Dependent Conductivity

Contact Info

Product

Resources

About