Results 11 to 20 of about 3,382,432 (137)
Materials Research Express, 2020 Space charge dynamics under AC stress is of importance as a majority of high voltage cables are under AC stress, and space charge is the driving mechanism of dielectric degradation under these conditions.
Xinjing Cai +3 more
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Mesoscopic study of bipolar charge transport in polymer-based devices [PDF]
Synthetic Metals, 2001 AbstractWe present generalised Monte-Carlo calculations of bipolar charge carrier transport in polydiacetylene (PDA) to assess effects of some key factors on the properties of polymer-based light-emitting diodes (PLEDs). Our mesoscopic model includes specific realisations of the polymer network and examines the effect of polymer structural order on ...
Ramos, MMD, Stoneham, AM
openaire +4 more sources
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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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
doaj +1 more source
IET Generation, Transmission & Distribution, 2021 The heterocharge accumulated in the oil‐paper insulation system of the converter transformer will enhance the local electric field and cause insulation deterioration. Numerical simulation is an effective method to analyze heterocharge.
Shen Yan +5 more
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Effect of DC Pre-stress on Space Charge and Electrical Tree in XLPE with Needle-Plate Electrodes
Zhongguo dianli, 2021 Space charge is one of the main factors that affect the electrical tree characteristics of HVDC cable insulation. Based on the bipolar charge transport model, this paper simulates the space charge distribution characteristics of the two-dimensional ...
Xiaobin XU +5 more
doaj +1 more source
Charge Transport: Paths and Energy Profiles [PDF]
, 2022 To maintain life, charge transfer processes must be efficient to allow electrons to migrate across distances as large as 30 – 50 Å within a timescale from picoseconds to milliseconds, and the free-energy cost should not exceed one electron volt.
Ibrahim, Maqboul
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Charge Injection in Gold Ground Electrode Corona Charged Polyethylene Film: Numerical Simulation on Surface Potential Decay [PDF]
, 2011 Surface potential decay measurement is a simple and low cost tool to examine electrical properties of insulation materials. Bipolar charge injection has been verified by the measurement of space charge in the corona-charged sample using the pulsed ...
Zhuang, Yuan +5 more
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Energies, 2021 In order to improve the thermal conductivity and the insulation properties of polyethylene (PE) used as cable insulation under DC stress, hexagonal boron nitride (h-BN) and inorganic particles have been considered as micro-filler and nano-filler ...
Xuri Xu +5 more
doaj +1 more source