Reliability Evaluation Method for Oil–Paper Insulation in Power Transformers
Energies, 2011 The overall life of oil-immersed power transformers depends on the long-term life of the oil–paper insulation system throughout continuous operation. Studying the reliability assessment methods for oil–paper insulation can help determine the reliability ...
Stanislaw Grzybowski +2 more
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Solid insulation drying of 110 kV paper-oil instrument transformers
Electrical, Control and Communication Engineering, 2009 Influence of moisture on the instrument transformers' paper-oil insulation and its further maintenance is described in this paper. Improved insulation drying method using vacuum and temperature regulation with definite regulation algorithm of parameters ...
Gerards Gavrilovs, Sandra Vītoliņa
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Analytical methods for assessing paper degradation In transformers [PDF]
, 2006 Power transformers are essential equipments for distributing electricity. However, maintenance of these equipments is necessary to ensure long working life and to avoid catastrophic incidents.
Christofidis, Stavros
core +7 more sources
A Comparative Study of Physicochemical, Dielectric and Thermal Properties of Pressboard Insulation Impregnated with Natural Ester and Mineral Oil [PDF]
, 2011 Natural ester is considered to be a substitute of mineral oil in the future. To apply natural ester in large transformers safely, natural ester impregnated solid insulation should be proved to have comparable dielectric strength and thermal stability to ...
Yang, Lijun +9 more
core +2 more sources
Space charge characteristics of multi-layer oil-paper insulation under different DC voltages [PDF]
, 2009 In this paper, space charge in oil-paper insulation system has been investigated using the pulsed electroacoustic (PEA) technique. A series of measurements were carried out when the insulation system was subjected to different applied voltages.
M Fu +7 more
core +2 more sources
IET Science, Measurement & Technology, 2021 This paper utilizes a hybrid Debye model to accurately simulate the relaxation response process of the oil‐paper insulation of a transformer to explore the application of frequency domain dielectric spectroscopy (FDS) in nondestructive diagnosis of the ...
Yang Zou +3 more
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Space charge behavior in multi-layer oil-paper insulation under different DC voltages and temperatures [PDF]
, 2010 Oil-paper as a reliable insulation system is widely used in power transformers and cables. The dielectric properties of oil-paper insulation play an important role in the reliable operation of power equipment. However, the formation and dynamics of space
Liao, Rujin +7 more
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Multi-Scale Bionic Structure Constructs Biomass Flame-Retardant Thermal Insulation Foam Material. [PDF]
Adv Sci (Weinh)Inspired by mussel adhesion and hierarchical brick‐and‐mortar architectures, a cellulose‐based biomimetic foam is constructed by anchoring bentonite nanosheets onto a polydopamine‐decorated cellulose nanofiber network. The resulting foam combines low thermal conductivity with intrinsic flame retardancy and full biodegradability, presenting a ...
Liao J +10 more
europepmc +2 more sources
Electric field distribution characteristics of typical insulation structures in aramid–synthetic ester oil transformers [PDF]
AIP AdvancesBoth aramid paper and synthetic ester oil have high heat resistance levels. Using them as the main insulating materials for transformers is expected to improve the heat resistance level of oil-immersed transformers.
Meng Gao +4 more
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IET Science, Measurement & Technology, 2022 The main insulation structure of the valve‐side winding of converter transformer bears the effect of AC and DC superimposed voltage during operation.
Lijun Yang +3 more
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