Results 11 to 20 of about 6,484 (263)
Influences of Corrosive Sulfur on Copper Wires and Oil-Paper Insulation in Transformers
Energies, 2011 Oil-impregnated paper is widely used in power transmission equipment as a reliable insulation. However, copper sulphide deposition on oil-paper insulation can lead to insulation failures in power transformers. This paper presents the influences of copper
Jian Li +3 more
doaj +1 more source
Quantitative prediction of aging state of oil-paper insulation based on Raman spectroscopy
AIP Advances, 2021 Accurate monitoring of insulation aging of oil-paper insulation power equipment such as oil-immersed transformers is a key and difficult point in the field of high voltage research.
Xingang Chen +5 more
doaj +1 more source
High Voltage, 2019 Insulation oil is an important dielectric in power devices, and many studies on mixed insulation oil have been conducted in recent years to improve the performance of insulation oils.
Dawei Feng +5 more
doaj +1 more source
Frequency Domain Diagnostics of Transformer Insulation
Приборы и методы измерений, 2019 The first part of paper deals with the base information about diagnostics of power transformers. In this part are presented differently insulating methods, for example method of recovery voltage method, method of polarization and depolarization currents ...
M. Gutten +6 more
doaj +1 more source
EFFECT OF THERMAL AGEING ON THE OIL-PAPER INSULATION
Acta Electrotechnica et Informatica, 2014 Insulation system is one of the most important part of electrical devices. This insulation system is usually composed by solid part and liquid part. Oil impregnated insulation paper is used in transformers for many years. There are a lot of factors which have significant influence on the insulation system during the life time of electrical devices ...
Lukáš LISOŇ +2 more
openaire +1 more source
High Voltage, 2021 This study extensively investigated the ageing characteristics and lifetime model of oil–paper insulation for oil‐immersed paper condenser bushing. The accelerated thermal and electrothermal ageing experiments of oil‐immersed paper condenser bushing were
Sihang Gao, Lijun Yang, Tingjing Ke
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
openaire +1 more source