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Augmented Models of High-Frequency Transformers for SMPS [PDF]
, 2009 The modeling of high-frequency transformers via augmented equivalent circuits is addressed. The augmented models are composed of a low-frequency equivalent and a supplemental element modeled via real rational fitting. They offer both high accuracy levels
Savi, Patrizia +3 more
core +1 more source
UHF diagnostic monitoring techniques for power transformers [PDF]
, 2004 This paper initially gives an introduction to ultra-high frequency (UHF) partial discharge monitoring techniques and their application to gas insulated substations.
Bennoch, C.J. +3 more
core +3 more sources
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 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
core +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
openaire +2 more sources
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
openaire +2 more sources
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
core +1 more source
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
doaj +1 more source
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
doaj +1 more source