Results 21 to 30 of about 782,951 (248)
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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IEEE Access, 2020 The main dielectric medium in converter transformers is the oil-pressboard. The valve windings of converter transformers are subjected to AC-DC combined voltage. Creepage discharge is a common defect of oil-pressboard insulation.
Peng Zhou +5 more
doaj +1 more source
The Performance of an Integrated Transformer in a DC/DC Converter [PDF]
TELKOMNIKA (Telecommunication Computing Electronics and Control), 2017 The separation between the low-voltage part and high-voltage part of the converter is formed by a transformer that transfers power while jamming the DC ring. The resonant mode power oscillator is utilized to allow elevated competence power transfer.
Abdelhadi Namoune +2 more
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The response of transformers to geomagnetically induced- like currents [PDF]
, 2014 Includes bibliographical references.This dissertation discusses the development and implementation of a rigorously developed protocol for characterizing and testing transformers with GIC-like currents based on their magnetization curve characteristics ...
Chisepo, Hilary K
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Energies, 2017 Partial discharge (PD) behaviors of oil-paper insulation is distinctive in AC and DC combined electric fields in converter transformers from PD behaviors in pure AC or DC electric fields.
Jiantao Sun +4 more
doaj +1 more source
A Comprehensive Assessment of Multiwinding Transformer-Based DC–DC Converters
IEEE Transactions on Power Electronics, 2021 Multiwinding-transfomer-based (MTB) dc–dc converter did emerge in the last 25 years as an interesting possibility to connect several energy systems and/or to offer higher power density because of the reduction of transformer core material and reduction of power converter stages.
Thiago Pereira +3 more
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DC Bias in Transformers of Dual Current Power Supply Lines
Chengshi guidao jiaotong yanjiu［Objective］ To ensure the safety of traction transformers in dual current power supply lines and prevent issues such as transformer vibration and winding temperature increase caused by excessive DC bias current, which can lead to severe distortion of ...
LI Xuefei +4 more
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Zhongguo dianli, 2020 Based on the operating characteristics of the DC blocking devices, this paper analyzes the influence of the DC blocking devices on the DC current near the neutral point of the transformers, and proposes a multi-objective optimization configuration method
Hongwei LIU
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, 2015 Analysis of real operating condition revealed that HVDC transformers experience combined effect of DC biased AC electric field. The dynamics of pressboard particle in contaminated transformer oil under the influence of DC, AC and DC biased AC electric ...
Mahmud, S. +4 more
core +1 more source
Reachability Analysis of Transformer-Isolated DC-DC Converters
EPiC Series in Computing, 2018 Various mission-critical applications necessarily require a transformer in switching converters to obtain DC isolation between the converters’ input and output. Since DC-DC converters are the switching devices, these are modeled as hybrid automata. We present hybrid automaton modeling of two main types of transformer isolated DC-DC converters, namely ...
Omar Beg, Ali Davoudi, Taylor T. Johnson
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