Results 41 to 50 of about 1,432 (200)
Analysis of Internal Overvoltages in Transformer Windings during Transients in Electrical Networks
Energies, 2020 Due to the increasing requirements for the reliability of electrical power supply and associated apparatus, it is necessary to provide a detailed analysis of the overvoltage risk of power transformer insulation systems and equipment connected to their ...
Jakub Furgał +2 more
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Switching transients caused by vacuum circuit breakers in collection grids of offshore wind farms
Wind Energy, 2021 In this study, transients that can occur in the collection grids of offshore wind farms were investigated. On the basis of the multiple prestrike and reignition model that can reflect the actual operation of a vacuum circuit breaker (VCB), a switching ...
Jiayuan Tao +6 more
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Considering the Switching Strategy of the Transmitting Wind Power to Deal with the DC Blocking Fault Under the Constraint of Transient Overvoltage [PDF]
Dianli jianshe[Objective] For the power grid with high penetration of new energy，measures such as rapid shut-off or emergency reduction of the power of new energy stations are often used to deal with DC lockout faults，but the cutting will weaken the strength of the ...
MA Qiang, YIN Chunya, QIN Yanhui, MA Xing, TANG Zhipeng
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Hybrid HVDC circuit breakers with an energy absorption branch of a parallel arrester structure
High Voltage, 2022 Hybrid circuit breakers (CBs) are the most promising technology to isolate DC faults in modular multilevel converter (MMC)‐based DC grids. However, they consist of expensive power electronic components that are sensitive to high overvoltage and ...
Jingqiu Yu +3 more
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Energies, 2023 The paper aims to analyze the parameters of prototypes of new overvoltage protection devices for power grids—a multi-chamber insulator arrester (MCA) and a long flashover arrester (LFA). The article presents the research results on determining the actual
Michał Borecki, Maciej Ciuba
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Switching Overvoltages in Offshore Cable...
Kalpa Publications in Engineering, 2018 Switching overvoltages are the major concern with the cable system. For insulation coordination and design aspects one should know the range of this overvoltages. Different overvoltages and its effects on the system protection are described here. Some of mitigation techniques for switching transients are also listed.
Nidhi Parmar +3 more
openaire +2 more sources
Impact of Parasitics and Load Current on the Switching Transient Time and Motor Terminal Overvoltage in SiC-Based Drives [PDF]
, 2020 The fast switching speed of silicon carbide (SiC) MOSFETs has enabled converters to operate at higher switching frequencies with enhanced efficiencies, achieving performance improvement in motor drive systems.
Yuan, Xibo, Zhou, Wenzhi, Diab, Mohamed
core +2 more sources
Fundamental Modeling of the Switching Transition in High-Speed Power Electronics
IEEE AccessRecent advances in semiconductor technology have paved the way for ultra-fast switching capabilities. This increase in switching speed enhances efficiency, power density, and frequency but also increases overvoltage oscillations at the switching node ...
Francois P. Du Toit, Ivan W. Hofsajer
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The Journal of Engineering, 2019 In the hierarchically connected ultra-high voltage (UHV) DC projects, the minimum air clearance on the 1000 kV AC side of converter transformer directly affects the layout and area of the valve hall.
Lou Ying +3 more
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Energies, 2020 Harmonic overvoltage in electric railway traction networks can pose a serious threat to the safe and stable operation of the traction power supply system (TPSS).
Qiujiang Liu +4 more
doaj +1 more source