Results 11 to 20 of about 6,096 (326)
IET Science, Measurement & Technology, 2022 To explore the aging assessment method of the oil–paper insulation in power transformers, the polarization and depolarization current (PDC) characteristics of oil–paper composite insulation samples are investigated under high applied voltage.
Yu Zhuang +3 more
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IET Generation, Transmission & Distribution, 2021 The accuracy and feasibility of the traditional XY model of transformer oil–paper insulation system are disputable since it ignored the effect of non‐uniform aging and conductance on dielectric response property.
Xianhao Fan +5 more
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IET Generation, Transmission & Distribution, 2021 In this paper, the effect of moisture on the charge behaviour in oil‐impregnated pressboard is analysed based on the characteristics of the interface and the bulk.
Guiyue Zhou, Jiandong Wu, Lu Che, Yi Yin
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IET Power Electronics, 2021 In this paper, an interleaved zero voltage switching high step‐up converter based on active clamp, coupled inductor (CI), built‐in transformer (BIT), and switched capacitor (SC) is proposed.
Alireza Bagherian +3 more
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IET Power Electronics, 2021 This paper presents a new method for driving the magnetron for a sulfur plasma tube using the two‐switch forward converter structure with a phase‐shifting active clamp (1000±40 W, 285 mA, 4 kV).
Abolfazl Nasiri, Mohamad Reza Banaei
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IET Generation, Transmission & Distribution, 2021 The reality of modern power grids requires the use of flexibilities from generation, load and storage. These flexibilities allow system operators to modify a transformer loading in a smart way. Therefore, power constraints of transformers can be overcome
Ildar Daminov +3 more
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IET Science, Measurement & Technology, 2021 Considering that the working temperature is much higher in high‐voltage direct‐current (HVDC) convert transformers than in conventional AC transformers, the combination of thermally upgraded paper and natural ester might be a better choice to withstand ...
Runhao Zou +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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Ageing of DC conduction in thermally aged oil‐impregnated pressboard
IET Science, Measurement & Technology, 2021 Ageing of the conduction process in a dielectric allows a better understanding of the phenomena. Available literature shows that the DC conductivity of oil impregnated pressboard increases with applied electric stress, particularly above 40 °C.
Nasirul Haque +3 more
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IET Science, Measurement & Technology, 2021 In this research, the authors concentrated on a rarely studied part in the power transformer's insulation structure: the connection part of radial and axial spacers. An experimental model was constructed to simulate this part.
Li Lu +2 more
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