Results 21 to 30 of about 70,444 (281)
Scientific ReportsWhitecap foam, created by breaking waves, is a ubiquitous ocean surface feature. Full understanding of its role in the air-sea interaction is crucial for precise momentum flux parameterization which directly influences forecast accuracy, especially in ...
Meng Lyu +5 more
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Research on Inrush Current Suppression of Transformer Based on Changeable Closing Angle
Zhongguo dianli, 2022 The transformer no-load closing inrush current may cause safety problems in power grid, and the controlled switching technology with fixed target angle still has room for improvement in suppressing inrush current. A transformer inrush current suppression
Haitao LI +5 more
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IEEE Access, 2021 Inrush current with high amplitude is generated when the transformer is energized. On the one hand, it will have a negative impact on the safety of the transformer itself, and even cause the relay protection to malfunction.
Yuanlin Pan +5 more
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Energies, 2021 When the electromagnetic transients occur in a power transformer, an inrush current is generated in its winding. The inrush current not only affects the performance of the transformer windings, but also affects the lifetime of the transformer.
Wenqi Ge +4 more
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Energies, 2023 Grid-connected photovoltaic (PV) power systems are one of the most promising technologies to address growing energy demand and ecological challenges. This paper proposes smart switching to mitigate inrush currents during the connection of single-phase ...
Gerardo de J. Martínez-Figueroa +2 more
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Controlled switching of power transformers with residual flux
, 2011 Le transformateur de puissance est un équipement essentiel d’un réseau électrique et le plus coûteux dans les postes. Pour augmenter son degré de disponibilité et de fiabilité, il est nécessaire d’appliquer la manœuvre contrôlée afin de diminuer la saturation du noyau lors de l’enclenchement, et donc limiter les courants d’appel.
Liu, Tian
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Measurement: Sensors, 2021 This paper reported the relation of residual magnetic flux density and temperature of the neodymium magnets in electromagnetic microforce generating machine developed by referring to the principle of the Kibble balance at NMIJ, AIST.
Junfang Zhu +2 more
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Mechanism and Method for Residual Flux Detection of Transformer Cores Based on Different Polarities Response Currents [PDF]
Journal of Electromagnetic Engineering and ScienceThis paper proposes a residual flux detection method based on the different polarities of response currents. When a positive–negative alternating DC voltage is loaded, the direction of the residual flux can be determined by the difference between the ...
Cailing Huo +3 more
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Residual Flux Density Measurement Method of Single-Phase Transformer Core Based on Time Constant
IEEE Access, 2020 Residual flux density in the single-phase transformer core can dramatically increase inrush current when the transformer is energized. To reduce inrush current, it is necessary to study residual flux density measurement.
Cailing Huo +4 more
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Revised eddy covariance flux calculation methodologies – effect on urban energy balance [PDF]
Tellus: Series B, Chemical and Physical Meteorology, 2012 Eddy covariance (EC) measurements of turbulent fluxes of momentum, sensible heat and latent heat – in addition to net radiation measurements – were conducted for three consecutive years in an urban environment: Helsinki, Finland.
Annika Nordbo +2 more
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