A New Method to Evaluate Residual Flux Thanks to Leakage Flux, Application to a Transformer [PDF]
IEEE Transactions on Magnetics, 2014 This paper presents a new method to estimate the residual flux in the magnetic circuit of a transformer, which is the key data to determine the ideal closing time for the re-energization of a transformer. The methodology described is based on the measurement with fluxgate sensors of the magnetic field induced by the leakage flux around a single-phase ...
Jean-Louis Coulomb, Olivier Chadebec
exaly +4 more sources
Fast demagnetization method for power transformers combined with residual flux measurement
International Journal of Electrical Power & Energy SystemsWhen power transformers are re-energized, the inrush current may be generated and damage electrical equipment. In order to suppress the generation of serious inrush current, the residual flux (RF) in the power transformer core needs to be eliminated ...
Yuzhan Ren, Chengcheng Liu, Youhua Wang
doaj +4 more sources
Study on the residual flux density measurement method for power transformer cores based on magnetising inductance [PDF]
IET Electric Power Applications, 2022 When a power transformer is reconnected to a power grid, if the residual flux in its iron core is large, significant inrush current may be generated and result in closing failure.
Cailing Huo +3 more
doaj +2 more sources
Comparison of the impact of high-flux dialysis on mortality in hemodialysis patients with and without residual renal function. [PDF]
PLoS ONE, 2014 BACKGROUND: The effect of flux membranes on mortality in hemodialysis (HD) patients is controversial. Residual renal function (RRF) has shown to not only be as a predictor of mortality but also a contributor to β2-microglobulin clearance in HD patients ...
Hyung Wook Kim +11 more
doaj +2 more sources
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
doaj +3 more sources
Prediction of Transformer Residual Flux Based on J-A Hysteresis Theory
EnergiesCircuit breakers are effectively utilized for the controlled switching technique to mitigate inrush current when energizing an unloaded transformer. The core of the controlled switching technique is to obtain the appropriate closing angle based on the ...
Qi Long +7 more
doaj +2 more sources
A simulation of thermal coupling characteristics on deep-sea residual oil recovery via pipeline using thermophysical properties [PDF]
Scientific ReportsDeep-sea residual oil has been recognized as a significant environmental hazard due to its poor low-temperature fluidity and complex recovery processes necessitating urgent solutions.
Yongjie Bao +5 more
doaj +2 more sources
EnergiesResidual magnetism in power transformer cores can cause severe inrush currents, threatening grid safety. The accuracy of residual magnetism testers depends on reference values from calibration platforms, yet current calibration platforms suffer from ...
Yuwei Wang +9 more
doaj +2 more sources
Employing high-temperature gas flux in a residual salt separation technique for pyroprocessing
Nuclear Engineering and Technology, 2019 Residual salt separation is an essential step in pyroprocessing because its reaction products, as prepared by electrochemical unit processes, contain frozen residual electrolyte species, which are generally composed of alkali-metal chloride salts (e.g ...
Sung-Wook Kim +7 more
doaj +2 more sources
Methods for Determining the Residual Flux in a Magnetic Core
, 2020 Remanentni tok u magnetskoj jezgri može stvarati značajne probleme u radu elektroenergetskog sustava, posebice pri uklopu transformatora na nazivni napon. U praksi ga je nemoguće izravno mjeriti s obzirom da je zatvoren unutar jezgre. Iako postoje metode koje ga neizravno određuju, zbog njihovih nedostataka javlja se potreba za razvojem novih koje će ...
Vulin, Dragan
openaire +2 more sources