Space Charge Accumulation in Linear Low-Density Polyethylene with Surface Fluorination of the Semiconductive Electrode

Pan, Jiaping; Lyu, Mingshu; An, Zhenlian; Zheng, Feihu; Zhang, Yewen

doi:10.1109/tdei.2021.009489

Cited by 3 publications

(5 citation statements)

References 14 publications

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“…The following hypothetical model of space charge injection has been proposed [13]: for a flat PE sample with poly(ethylene-vinyl acetate) (EVA) mixed carbon black (CB) electrodes on both sides, the charge of different polarities will be simultaneously injected into the sample from both electrodes and distributed at different spatial locations under the DC voltage application. Among them, the homocharge is primarily generated from the CB particles in the electrodes, whereas the heterocharge is dissociated from the impurity molecules in the electrodes and PE plates.…”

Section: The Principle and Realization Conditions Of The Pwp Methodsmentioning

confidence: 99%

“…Their injection and distribution characteristics are determined by the mass ratio and particle size of CB particles in the electrodes [14]. In figure 1(a) [13], the homocharge generated by the CB particles is greater than the heterocharge dissociated from the impurity molecules, so the total apparent net charge is shown as homocharge (for the cathode). Otherwise, figure 1(b) demonstrates that impurity molecule diffusion is more pronounced in the sample, resulting in more heterocharge injection; hence, the total apparent net charge is shown as heterocharge (for the cathode).…”

Section: The Principle and Realization Conditions Of The Pwp Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of uncertainties in the measurement of the space charge distribution in dielectrics

Pan¹,

Cao²,

Zheng³

et al. 2023

Meas. Sci. Technol.

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The results obtained by the commonly used space charge distribution measurement methods are frequently apparent and one-dimensional results of a localized area, and there may be random errors caused by various factors. In this work, three factors—sample thickness uniformity, pressure wave intensity uniformity, and space charge distribution uniformity—that may cause measurement uncertainties are examined. The analysis and evaluation of the experimental data are impacted by the measurement uncertainties, which are particularly noticeable in the experiments of semiconductive electrode-flat polyethylene (PE) samples using the laser-induced pressure propagation (LIPP) method. These factors are investigated separately with several auxiliary experiments, including laser beam spot energy distribution measurement and space charge distribution measurements at different measuring positions on the same uniform sample. A clear and intelligible model is developed to discuss the influence of these factors on the uncertainties in the space charge distribution measurement in dielectrics.

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Section: The Principle and Realization Conditions Of The Pwp Methodsmentioning

confidence: 99%

Section: The Principle and Realization Conditions Of The Pwp Methodsmentioning

confidence: 99%

Analysis of uncertainties in the measurement of the space charge distribution in dielectrics

Pan¹,

Cao²,

Zheng³

et al. 2023

Meas. Sci. Technol.

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“…Therefore, submicrometer measurement accuracy is required for the measurement of EDL. The existing space charge measurement methods, such as the pressure wave propagation (PWP) method, pulsed electro-acoustic (PEA) method, and Kerr photoelectric effect, cannot meet the resolution requirements for the measurement of EDL. − Recent years, with the development of scanning probe microscopy technology, some measurement methods are combined with atomic force microscopy (AFM) to obtain the surface morphology information and other property information simultaneously, such as electric force microscopy (EFM), magnetic force microscopy (MFM), scanning capacitance microscopy (SCM), kelvin probe force microscopy (KPFM), and so on. − KPFM is a powerful experimental means for further research on EDL at the oil–paper interface, the surface morphology of insulating paper and the local potential of EDL at the oil–paper interface can be obtained simultaneously with nanometer spatial resolution and millivolt potential resolution. − It provides potential to investigate the charge distributions in EDL on the scale of submicrometers.…”

Section: Introductionmentioning

confidence: 99%

Probing and Modulation of the Electric Double Layer at the Insulating Oil–Paper Interface

Gao,

Chen,

et al. 2023

Langmuir

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“…The premature degradation or failure of cable can happen due to severe electric field distortion due to charge accumulation . Heretofore, the studies related to solid–solid interface insulation of prefabricated joints are focused on the charge polarity, electric field distribution, the actual area of contact at the interface, and interface fluorination . However, to ensure the reliability of the cable joints, the size and weight of prefabricated joints are designed to be much large, especially for HVDC cables.…”

Section: Introductionmentioning

confidence: 99%

“…28 Heretofore, the studies related to solid−solid interface insulation of prefabricated joints are focused on the charge polarity, 29 electric field distribution, 30 the actual area of contact at the interface, 31 and interface fluorination. 32 However, to ensure the reliability of the cable joints, the size and weight of prefabricated joints are designed to be much large, especially for HVDC cables. To avoid these problems, factory joints are a good solution.…”

Section: Introductionmentioning

confidence: 99%

Spraying Core–Shell ZnO To Achieve High Insulation Performance for HVDC Cable Factory Joints

Meng

Chen

Shi

et al. 2022

ACS Appl. Energy Mater.

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The interface insulation plays a key role in the long-distance high-voltage direct current (HVDC) cables. In this paper, four core–shell ZnO suspensions formed by different alkane coating were prepared for spraying on the factory joint interface. The chemical, electrical, and simulation studies were performed on synthesized nanoparticles and factory joint samples. Results show that the alkane-coated ZnO exhibits a noticeable surface halo and the thermal weight loss ratio increases with the increase of the alkane chain. Moreover, with the increase in the sprayed C1-ZnO concentration (coated by trimethoxymethylsilane) from 0.005 to 0.1 wt%, the insulating properties of the samples show an increasing trend at first and then decrease. Furthermore, as the encapsulated alkane chain increases, a very small concentration of 0.01 wt% of ZnO suspension (C6-ZnO) coated with hexyltrimethoxysilane was found to be a highly effective spray reagent, which can significantly reduce the DC electrical conductivity, increase the DC breakdown strength, and remarkably inhibit the space charge accumulation at the interface. The microscopic characterization showed a good dispersion of nanoparticles at the interface. The space charge simulation and molecular simulation results elucidated the mechanism of the interfacial nanoparticles to suppress the space charge and insulation property improvement. This approach provides a new solution for realizing 500 kV or higher voltage DC cables to achieve long-distance connections and breakpoint repairs or improve other polymer interface insulation.

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Space Charge Accumulation in Linear Low-Density Polyethylene with Surface Fluorination of the Semiconductive Electrode

Cited by 3 publications

References 14 publications

Analysis of uncertainties in the measurement of the space charge distribution in dielectrics

Analysis of uncertainties in the measurement of the space charge distribution in dielectrics

Probing and Modulation of the Electric Double Layer at the Insulating Oil–Paper Interface

Spraying Core–Shell ZnO To Achieve High Insulation Performance for HVDC Cable Factory Joints

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