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Studies on Space Charge Accumulation Properties in Dielectric Materials
2019 2nd International Conference on Electrical Materials and Power Equipment (ICEMPE), 2019With the development of HVDC Light project since 1990's, it is necessary to construct the large scale electric power grid with reliable DC insulation system, connecting wind farms to power grid, underground power links, connecting asynchronous grids, etc. Therefore, it is important to propose advanced detection technique under DC high electrical stress,
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Investigating ac space charge accumulation in polymers by PEA measurements
2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.00CH37132), 2002This paper presents the first results of a procedure which allows the determination of the threshold for space charge build-up in polymeric insulation subjected to ac electrical field. Thresholds for space charge accumulation under dc were determined by observing insulation until space charge appeared steadily. In ac the amount of charge accumulated is
Montanari G. C. +3 more
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Surface charge decay characteristics of epoxy spacer under space charge accumulation
Journal of Physics D: Applied PhysicsAbstract Under DC voltage, space charge inevitably accumulates within the spacer, thereby influencing the dissipation of surface charges. In this study, a charge measurement platform for epoxy resin spacers is constructed. The temporal variation of the surface charge distribution under space charges is compared. The results indicate that
Fangwei Liang +6 more
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The effect of space charge accumulation in high voltage insulation systems
2017 18th International Scientific Conference on Electric Power Engineering (EPE), 2017Because of the financial savings and with respect for the environment, several efforts are made to replace AC voltage long distance transmission lines for DC voltage transmission lines. This may lead to increases of charging of insulation materials. The main aim of this paper is to describe the space charge accumulation in insulation material and its ...
Jaroslav Hornak +3 more
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Effect of modification of copper electrode on the space charge accumulation in LDPE
Modern Physics Letters B, 2019In this paper, titanium and tungsten films were coated on copper sheets, respectively, by plasma chemical vapor deposition (PCVD). The copper sheets before and after coating were, respectively, injected as charge into the low-density polyethylene (LDPE), the space charge accumulation in LDPE was tested by the thermally stimulated current (TSC), and the
Yuan Li +4 more
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Space charge accumulation in two power cable grades of XLPE
IEEE Transactions on Dielectrics and Electrical Insulation, 1998The accumulation of space charge in XLPE (cross-linked polyethylene), cross-linked using DCP (dicumyl peroxide) or a silane-based grafting process, was studied via the LIPP (laser-induced-pressure-pulse) technique. Planar samples 0.5 mm thick were obtained from the XLPE insulation of power distribution cables.
K.R. Bambery, R.J. Fleming
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Space Charge Accumulation in Thermally Aged Epoxy Resin
2023 4th International Conference on High Voltage Engineering and Power Systems (ICHVEPS), 2023Amrendra Kumar, Nandini Gupta
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Increase of refractive indices in liquid dielectrics by space charge accumulation
6th International Symposium on Electrets,(ISE 6) Proceedings., 2003Summary form only given, as follows. Distributions of refractive indices were measured with Mach-Zehnder and Schlieren techniques in liquid dielectrics where space-charge conduction took place with a parallel-plane-electrode configuration under direct voltage application.
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Mitigating Space Charge Accumulation at Various Temperatures Using Electrets
2023 IEEE Electric Ship Technologies Symposium (ESTS), 2023Pradip Chandra Saha +2 more
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