Results 11 to 20 of about 17,353,436 (262)
IEEE Transactions on Dielectrics and Electrical Insulation, 2022 A bipolar charge transport model has first been used to compare the current voltage characteristics (J-E) for different applied voltage protocols and different times under voltage taking low density polyethylene as a case study, as a steady state may take a very long time to be reached experimentally. Simulation results highlight the necessity to spend
Le Roy, Séverine +3 more
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Journal of Physics D: Applied Physics, 2022 Abstract Predicting the electric field distribution in polymers used as electrical insulating materials remains the Holy Grail, as the presence of charges disturbs the Laplacian electric field. Charges arising from the electrodes are one of the dominant mechanisms of charge generation, particularly in polyethylene-based materials. Hence,
Le Roy, Séverine, Hoang, M
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Modelling of Electroluminescence in Polymers Using a Bipolar Charge Transport Model [PDF]
, 2011 Electroluminescence (EL) in polymeric materials is thought to occur due to the energy dissipation process from the recombination of opposite polarity charge carriers. It is considered as an indication of storage and transport of charge carriers in cable insulation subject to electrical stresses and may indicate the change in charge movement due to ...
Zhao, J, Mills, D H, Chen, G, Lewin, P L
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IEEE Transactions on Dielectrics and Electrical Insulation, 2020 International audienceRecently, a numerical model has been developed for describing bipolar charge transport with two levels of traps (shallow and deep traps) in low density polyethylene (LDPE).
Florian Bugarin +2 more
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Introduction of Charge Transport Simulation Models That Fully Consider the Ionization Process [PDF]
IEEE Transactions on Dielectrics and Electrical InsulationBipolar carrier models for charge transport simulation in polymers have been developed for several years, but rarely consider the effect of ionization charges inside the polymer.
Zepeng Lv, Chunyang Zhang, Yifei He
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High Voltage, 2022 The charge transport and accumulation in oil–paper can cause the insulation degradation. So far, the most widely used model to simulate space charge transport and accumulation is the bipolar charge transport (BCT) model, which can well simulate the space
Jiefeng Liu +5 more
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Bipolar charge transport model to estimate charging and degradation processes in electron-beam-irradiated LDPE films [PDF]
Journal of Physics D: Applied Physics, 2019 Abstract Improvement of the performances of dielectric materials subjected to electrical stresses is one of the challenging objectives in a large number of domains of industrial applications. Achieving this goal requires a better understanding of the physical processes governing the behavior of dielectrics and their long-term ...
Banda, M.E. +3 more
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The influence of frequency of AC component on space charge behaviours in polyethylene under combined AC and DC electric fields [PDF]
, 2014 Combined ac and dc voltages may occur in high voltage power transmission system, which bring challenges to the dielectric materials. Generally speaking, space charge is well recognised under high voltage dc conditions but has received little attention ...
C. Zhou +3 more
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Preventing Space Charge Accumulation by Incorporating Electrets
Advanced Materials Interfaces, 2023 Space charge accumulates near electrodes in insulating materials under high voltage direct current. Electric stress created by charge accumulation distorts electric field, reduces the remaining useful life of insulating materials, and decreases partial ...
Pradip Chandra Saha +3 more
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IEEE Access, 2020 Space charge is one of the main causes of electrical tree initiation in high-voltage cable insulation. To investigate the influence of DC pre-stress on the space-charge distribution of cross-linked polyethylene (XLPE), a two-dimensional needle-plate ...
Hechen Liu +5 more
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