Results 21 to 30 of about 3,805,307 (284)
Вестник Северо-Кавказского федерального университета, 2022 The article presents a technique for estimating the consumer's contribution to the unbalance level of the negative sequence voltage at the point of common connection.
Dmitrii Kostyukov +2 more
doaj
The negative side of cohomology for Calabi-Yau categories [PDF]
, 2012 We study integer-graded cohomology rings defined over Calabi-Yau categories. We show that the cohomology in negative degree is a trivial extension of the cohomology ring in non-negative degree, provided the latter admits a regular sequence of central ...
Auslander +12 more
core +1 more source
VSC control strategy for HVDC compensating negative sequence and decaying DC components
Energy Reports, 2023 This paper proposes a voltage source converter (VSC) control strategy for the high voltage direct current (HVDC) transmission systems compensating the negative sequence and decaying DC (DDC) components. The mathematical model of the grid fault current is
Wu Yanwei +4 more
doaj +1 more source
A Negative Answer to the Prime Sequence Question [PDF]
Proceedings of the American Mathematical Society, 1979 If P is a complete intersection prime, i.e., a prime ideal generated by h t ( P ) ht(P) elements, in a Noetherian domain, can P be generated by a prime sequence, a regular sequence whose initial segments generate prime ideals?
openaire +2 more sources
The Ricci flow in a class of solvmanifolds [PDF]
, 2012 In this paper, we study the Ricci flow of solvmanifolds whose Lie algebra has an abelian ideal of codimension one, by using the bracket flow. We prove that solutions to the Ricci flow are immortal, the omega-limit of bracket flow solutions is a single ...
Arroyo, Romina M.
core +3 more sources
‘Negative repeating doublets’ in an aftershock sequence [PDF]
Earth, Planets and Space, 2013 We observed some ‘negative repeating doublets’, with nearly opposite three-component waveforms, in the aftershock sequence of the 2008 Wenchuan earthquake. The ‘negative repeaters’ are identified by using the broadband seismic record (with frequency range from 1 to 10 Hz) of the Wenchuan station (WCH) with a near epicenter distance from 19.7 to 26.6 km.
Ma, X. J., Wu, Z. L.
openaire +1 more source
Influence of Negative Sequence Injection Strategies on Faulted Phase Selector Performance
Energies, 2022 Renewable power is expected to increase drastically in the coming years due to the energy transition. A large part of the newly installed generators will be connected to the power system through inverters and electronic converters, whose behaviour ...
María Teresa Villén +3 more
doaj +1 more source
Detection and Location of Stator Winding Interturn Fault at Different Slots of DFIG
IEEE Access, 2019 Generators are critical components for the wind power generation system and process industries. Generating units or production lines may be shut down by generator failure.
Shuilong He, Xuhong Shen, Zhansi Jiang
doaj +1 more source
Limit cycles in piecewise-affine gene network models with multiple interaction loops [PDF]
, 2009 In this paper we consider piecewise affine differential equations modeling gene networks. We work with arbitrary decay rates, and under a local hypothesis expressed as an alignment condition of successive focal points. The interaction graph of the system
Farcot, Etienne, Gouzé, Jean-Luc
core +8 more sources
The Performance of a Three-Phase Induction Motor under and over Unbalance Voltage
Tikrit Journal of Engineering Sciences, 2022 Voltage unbalance is an adverse global phenomenon impacting three-phase induction motor output. Three-phase source voltage may become imbalanced in a variety of respects, while a balanced system preserves stable voltage magnitude and angles in three ...
Abdulsatar H. Jassim +2 more
doaj