DC conduction and electrical breakdown of MgO/LDPE nanocomposite

Murakami, Yoshinobu; Nemoto, Masaaki; Okuzumi, S.; Masuda, S.; Nagao, Masayuki; Hozumi, Naohiro; Sekiguchi, Y.

doi:10.1109/t-dei.2008.4446734

Cited by 231 publications

(119 citation statements)

References 13 publications

(12 reference statements)

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“…Lots of research works on nanodielectric BD properties under ac or dc voltage have been done so far [15][16][53][54][55][56][57][58][59][60][61]. Many useful experimental data are obtained.…”

Section: Breakdown Properties Of Nanodielectricsmentioning

confidence: 99%

Short-term breakdown and long-term failure in nanodielectrics: a review

Yin

Chen

et al. 2010

IEEE Trans. Dielect. Electr. Insul.

291

172

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Nanodielectrics, which are concentrated in polymer matrix incorporating nanofillers, have received considerable attention due to their potential benefits as dielectrics. In this paper, short-term breakdown and long-term failure properties of nanodielectrics have been reviewed. The characteristics of polymer matrix, types of nanoparticle and its content, and waveforms of the applied voltage are fully evaluated. In order to effectively comment on the published experimental data, a ratio k has been proposed to compare the electric properties of the nanodielectrics with the matrix and assess the effect for nanoparticles doping. There is evidence that the short-term breakdown properties of nanodielectrics show a strong dependence on the applied voltage waveforms. The polarity and the cohesive energy density (CED) of polymer matrix have a dramatic influence on the properties of nanodielectrics. Nanoparticle doped composites show a positive effect on the long-term failure properties, such as ageing resistance and partial discharge (PD) properties of nanocomposites are superior than microcomposites and the matrix. The larger the dielectric constant and CED of the matrix become, the more significant improvements in long-term performance appear. Based on the reported experimental results, we also present our understandings and propose some suggestions for further work.

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Section: Breakdown Properties Of Nanodielectricsmentioning

confidence: 99%

Short-term breakdown and long-term failure in nanodielectrics: a review

Yin

Chen

et al. 2010

IEEE Trans. Dielect. Electr. Insul.

291

172

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“…For low loading concentration, the charge suppression can be observed clearly by the pulsed electroacoustic method (PEA), while charge transport behavior becomes more complicated for high loading concentration. 3 Literature reports and our own measurement results indicated that the conductivity properties in nanodielectrics show different changes for different loading concentrations, [3][4][5][6][7][8] as shown in Figure 1. The polymer matrixs are LDPE (Low density polyethylene), LLDPE (Linear low density polyethylene), and PI (Polyimide), respectively.…”

mentioning

confidence: 99%

“…It has also been found that the related electrical performance, surface flashover, and breakdown deteriorate for nanodielectrics with high concentrations. 3,4,8,9 At present, the exact mechanisms of charge transport in nanodielectrics are not detailed, and the observed experiment phenomenon of charge conduction in nanodielectrics with high loading concentrations has never been fully explained.…”

mentioning

confidence: 99%

Charge transport model in nanodielectric composites based on quantum tunneling mechanism and dual-level traps

2016

Applied Physics Letters

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Charge transport properties in nanodielectrics present different tendencies for different loading concentrations. The exact mechanisms that are responsible for charge transport in nanodielectrics are not detailed, especially for high loading concentration. A charge transport model in nanodielectrics has been proposed based on quantum tunneling mechanism and dual-level traps. In the model, the thermally assisted hopping (TAH) process for the shallow traps and the tunnelling process for the deep traps are considered. For different loading concentrations, the dominant charge transport mechanisms are different. The quantum tunneling mechanism plays a major role in determining the charge conduction in nanodielectrics with high loading concentrations. While for low loading concentrations, the thermal hopping mechanism will dominate the charge conduction process. The model can explain the observed conductivity property in nanodielectrics with different loading concentrations.

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“…It has been shown in several instances that with the incorporation of nanoparticles, the space charge accumulation in polymers is substantially reduced [23]. As examples, nanometer-size fillers of silica (SiO 2 ) [24] and magnesium oxide (MgO) [25] incorporated into low-density polyethylene (LDPE) have been shown to be effective in suppressing space charge. The mechanisms behind those improvements are not completely clear at present [26], neither is the fate of the material integrity in time.…”

Section: Challenges Regarding Materials For Hvdc Cablesmentioning

confidence: 99%

DC Model Cable under Polarity Inversion and Thermal Gradient: Build-Up of Design-Related Space Charge

Adi¹,

Teyssèdre

et al. 2017

Technologies

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Abstract:In the field of energy transport, High-Voltage DC (HVDC) technologies are booming at present due to the more flexible power converter solutions along with needs to bring electrical energy from distributed production areas to consumption sites and to strengthen large-scale energy networks. These developments go with challenges in qualifying insulating materials embedded in those systems and in the design of insulations relying on stress distribution. Our purpose in this communication is to illustrate how far the field distribution in DC insulation systems can be anticipated based on conductivity data gathered as a function of temperature and electric field. Transient currents and conductivity estimates as a function of temperature and field were recorded on miniaturized HVDC power cables with construction of 1.5 mm thick crosslinked polyethylene (XLPE) insulation. Outputs of the conductivity model are compared to measured field distributions using space charge measurements techniques. It is shown that some features of the field distribution on model cables put under thermal gradient can be anticipated based on conductivity data. However, space charge build-up can induce substantial electric field strengthening when materials are not well controlled.

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DC conduction and electrical breakdown of MgO/LDPE nanocomposite

Cited by 231 publications

References 13 publications

Short-term breakdown and long-term failure in nanodielectrics: a review

Short-term breakdown and long-term failure in nanodielectrics: a review

Charge transport model in nanodielectric composites based on quantum tunneling mechanism and dual-level traps

DC Model Cable under Polarity Inversion and Thermal Gradient: Build-Up of Design-Related Space Charge

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