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Direct Measurement of Accumulated Space Charge Using External Currents
IEEE Transactions on Instrumentation and Measurement, 2021In the past few decades, immense contributions have been put in by researchers to measure the accumulation of space charge in dielectric materials. At the same time, the direct measurement of the amount of space charge in materials has been completely neglected, probably due to the difficulties in measuring currents at high-voltage (HV) electrode ...
Avnish Kumar Upadhyay +3 more
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Space charge accumulation in multilayer insulators
9th International Symposium on Electrets (ISE 9) Proceedings, 2002In a multilayer insulator made of two or more materials with different dielectric constants and conductivities, internal space charge accumulates at their interfaces. If the local field is increased by the accumulated charge, the electric durability of the insulator should be decreased.
T. Maeno, K. Fukunaga
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Space charge accumulation in dielectrics irradiated with light charged particles
[1991 Proceedings] 7th International Symposium on Electrets (ISE 7), 2002Accumulation of space charges in various solid dielectrics differing considerably by structure and physical properties as a result of irradiation by protons, deuterons, /sup 3//sub 2/He ions, and alpha -particles with 0.5 to 10 MeV per nucleon energy range and beam currents 10/sup -9/-5*10/sup -8/ A/cm/sup 2/ has been investigated.
S.G. Boev, V.A. Paderin, A.P. Tyutnev
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Space charge accumulation in epoxy-PET composites
2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2013Composite insulation systems are commonly used in high voltage apparatus. In the presence of multiple materials, interfaces between the materials assume considerable significance. Epoxy-PET composites are used as class B insulating materials in transformers but little is known about the interfacial charge behaviour in such a system.
Supriyo Das, Nandini Gupta
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Space charge accumulation in epoxy resin and polyethylene
2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, 2012Accumulation of space charge within a polymeric dielectric material, especially under dc voltage, is associated with its degradation. Space charge accumulation modifies the local field within the material and might contribute to its aging. Further, it would modify the conduction through the material.
Supriyo Das, Nandini Gupta
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The effect of humidity on space charge accumulation in XLPE
2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2004This paper investigates the effect of different humidity concentration in cross-linked polyethylene (XLPE) material, cut from HV cables, on space charge accumulation, through space charge measurements performed by the pulsed electroacoustic technique.
G.C. Montanari, F. Palmieri
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Space charge accumulation in electron irradiated PMMA
Journal of Electrostatics, 1991Abstract The results of experimental study of charge storage in PMMA after electron irradiation (energy range 0.8–2.0 MeV) published to date differ considerably and even qualitatively. There are papers showing alternating negative and positive charge layers of comporable magnitude with the corresponding number of zero-field planes. Still other papers
S.G. Boyev, A.P. Tyutnev
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What is Mechanism of Space Charge Accumulation in Polyethylene with Surface Fluorination?
2021 International Conference on Electrical Materials and Power Equipment (ICEMPE), 2021Several researches has proved that surface fluorination of polyethylene has a significant barrier effect of space charge, so whether the surface fluorination treatment of poly (ethylene-co-vinyl acetate) (EVA) loaded with carbon black particles electrode has the same effect?
Jiaping Pan +4 more
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Measurement of space charge accumulation in PPLP
Proceedings of 1999 IEEE 13th International Conference on Dielectric Liquids (ICDL'99) (Cat. No.99CH36213), 2003The author tested space charge accumulation in the oil impregnated insulation paper for DC oil-filled cables, and found that polypropylene shows no resistivity reduction with time whereas kraft paper in polypropylene laminated paper (PPLP) does show some reduction.
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Influence of carbon black in polyethylene on space charge accumulation
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2002In several studies regarding space charge accumulation in peroxide crosslinked polyethylene (XLPE) it is identified that the products from the crosslinking process give rise to heterocharge accumulation in a DC-field. Several ways to reduce this accumulation have been proposed.
A. Gustafsson +4 more
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