Results 1 to 10 of about 59,715 (153)
IET Science, Measurement & Technology, 2021 Polarity‐reversal voltage in high‐voltage direct current transmission system would cause serious electric field distortion, accelerating charge injection.
Boxue Du +6 more
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Unfolding Drift Effects for Cosmic Rays over the Period of the Sun’s Magnetic Field Reversal
The Astrophysical Journal, 2023 A well-established, comprehensive 3D numerical modulation model is applied to simulate galactic protons, electrons, and positrons from 2011 May to 2015 May, including the solar magnetic polarity reversal of Solar Cycle 24.
O. P. M. Aslam +4 more
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iScience, 2020 Summary: Carbon-carbon bond formation through polarity reversal ketyl radical anion coupling of carbonyls has inspired new reaction modes to this cornerstone carbonyl group and played significant roles in organic chemistry.
Shun-Shun Li +5 more
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High Voltage, 2020 In this study, a simulation model of surface charge accumulation has been established. The model considers three accumulation ways, i.e. electrical conduction within the gas, through insulator volume and along the insulator surface.
Yi Luo +7 more
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Energies, 2020 The superimposed transient electric field generated by polarity reversal causes severe stress to the high-voltage direct current (HVDC) cable insulation.
Sun-Jin Kim, Bang-Wook Lee
doaj +1 more source
Space charge dynamics in epoxy resin under voltage polarity reversal at various temperatures
High Voltage, 2021 Epoxy resin has been used to cast the core of the dry‐type high voltage direct current bushings and can accumulate space charge under high electric fields at high temperatures, which is believed to be a potential threat to the safe operation of dry ...
Peng Liu +5 more
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Unveiling Geomagnetic Reversals: Insights From Tipping Points Theory
Geophysical Research Letters, 2023 The geomagnetic field shows aperiodic reversals and excursions separated by stable polarity periods. Although the exact mechanisms responsible of reversals are still debated, several models of different complexity have been proposed. Here we use, for the
T. Alberti +3 more
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ASYMMETRIC SOLAR POLAR FIELD REVERSALS [PDF]
The Astrophysical Journal, 2012 The solar polar fields reverse because magnetic flux from decaying sunspots moves towards the poles, with a preponderance of flux from the trailing spots. Let us assume that there is a strong asymmetry in the sense that all activity is in the Northern Hemisphere, then that excess flux will move to the North Pole and reverse that pole, while nothing ...
Svalgaard, Leif, Kamide, Yohsuke
openaire +2 more sources
IET Science, Measurement & Technology, 2021 Polypropylene (PP) is being considered as a suitable alternative to the cross‐linked polyethylene (XLPE) insulation as the latter is prone to the space charge accumulation when subjected to the voltage polarity reversals in line‐commutated converter high
Ashish Paramane +3 more
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Partial discharge behavior under operational and anomalous conditions in HVDC systems [PDF]
, 2017 Power cables undergo various types of overstressing conditions during their operation that influence the integrity of their insulation systems. This causes accelerated ageing and might lead to their premature failure in severe cases.
Azizian Fard, M. +3 more
core +3 more sources