Results 21 to 30 of about 24,218,867 (287)
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
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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, 2023 The converter transformer is an essential part of the DC transmission system. Compared with the traditional oil‐impregnated AC transformer, the main insulation of the converter transformer bears more complex electric field aging stress during long‐term ...
Yizhou Zhang +4 more
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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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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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Dielectric Response of the Oil-Paper Insulation System in Nanofluid-Based Transformers [PDF]
IEEE Access, 2021 The interest in developing and testing dielectric nanofluids for electrotechnical purposes has increased significantly in the last ten years. A number of works have been published reporting dielectric and thermal properties for these liquids that enhance those of conventional insulating fluids.
Daniel Pérez-Rosa +2 more
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High Voltage, 2021 The low‐frequency polarisation information of oil‐paper insulation could be easily obscured by the conductance effect, and the contained polarisation information thus can not be readily extracted from the frequency domain spectroscopy (FDS).
Jiefeng Liu +4 more
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Evaluation of Oil Paper Insulation State of Traction Transformer
Journal of Physics: Conference Series, 2021 Abstract The improved grey target theory is applied to study the aging state of oil paper insulation of traction transformer. Firstly, the data are measured by the recovery voltage method and the related parameters are identified based on the ED equivalent circuit model, and the extracted parameters are used as the characteristic ...
Jiyong Liu +4 more
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Space charge behaviour in oil and impregnated pressboard combined insulation system [PDF]
, 2014 Dielectric performance of oil-pressboard insulation system used in high voltage direct current (HVDC) convertor transformers can be affected by the presence of space charge.
Hao, Miao +9 more
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Inversion of Oil-Immersed Paper Resistivity in Transformer Based on Dielectric Loss Factor
IEEE Access, 2019 The aging of the transformer oil-paper insulation distributes spatially, which results in changes in paper resistivity in different regions. This paper establishes an iterative inversion algorithm using the finite element method to calculate the oil ...
Jiangjun Ruan +5 more
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