Results 31 to 40 of about 9,388 (253)
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
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
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
Research on the Magnetostrictive Characteristics of Transformers under DC Bias [PDF]
, 2023 Direct current (DC) bias leads to increased vibration and noise in transformers. One of the main causes is the magnetostrictive effect of the transformer core.
Xiaodong Yu +4 more
core +1 more source
Modular High-Frequency High-Power Transformers for Offshore Wind Turbines [PDF]
, 2021 Conventional line frequency transformers are commonly used for wind turbines to step up the low-level voltage of the generators to reduce the transmission losses.
Weichong Yao +7 more
core +1 more source
Shielding effect of high frequency power transformers for DC/DC converters used in solar PV systems [PDF]
, 2010 Conventional high frequency power transformers are configured without protection to avoid parasitic effects. Therefore this paper presents and investigates a FEM technique and measurement results for planar and coaxial high frequency power ...
Sascha Stegen, Junwei Lu
openalex +3 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
Space charge dynamics in oil and thick pressboard combined system under polarity reversal voltage [PDF]
, 2014 In this study, the space charge dynamics in an oil and oil impregnated pressboard combined insulation system are investigated by the means of pulsed electroacoustic (PEA) technique under voltage polarity reversal conditions. To be closer to the real case
Hao, Miao +9 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