Results 31 to 40 of about 6,698,062 (304)

Influence of Negative Sequence Injection Strategies on Faulted Phase Selector Performance

open access: yesEnergies, 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

A thread-tag based semantics for sequence diagrams [PDF]

open access: yes, 2007
The sequence diagram is one of the most popular behaviour modelling languages which offers an intuitive and visual way of describing expected behaviour of object-oriented software.
Dan, H   +5 more
core   +1 more source

The negative sequence impedance as fault indicator in induction motors

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2013
An algorithm to detect inter-turn faults in induction motors based on the negative sequence impedance is presented in this paper. The implementation through a digital prototype is also explained and its results are tested using a 3 Hp induction motor ...
Fernando Villada   +4 more
doaj   +3 more sources

Orientable and Negative Orientable Sequences

open access: yesDiscrete Applied Mathematics
Analogously to de Bruijn sequences, orientable sequences have application in automatic position-location applications and, until recently, studies of these sequences focused on the binary case. In recent work by Alhakim et al., a range of methods of construction were described for orientable sequences over arbitrary finite alphabets; some of these ...
Chris J. Mitchell, Peter R. Wild
openaire   +3 more sources

Performance Evaluation of a Novel Sequence-Based Directional Detection Strategy for Protection of Active Distribution Networks

open access: yesIEEE Access
Directional elements are relied on to achieve selectivity in fault detection in power systems. Although such elements have been deployed successfully for many years, there is an increased need for novel methods to deal with the unique challenges of ...
Kwasi Opoku   +2 more
doaj   +1 more source

Unbalanced and Reactive Currents Compensation in Three-Phase Four-Wire Sinusoidal Power Systems

open access: yesApplied Sciences, 2020
In an unbalanced linear three-phase electrical system, there are inefficient powers that increase the apparent power supplied by the network, line losses, machine malfunctions, etc.
Rafael Montoya-Mira   +4 more
doaj   +1 more source

Rose: Generating Sequence Families [PDF]

open access: yes, 1997
Stoye J, Evers D, Meyer F. Rose: Generating Sequence Families. Forschungsberichte.
Stoye, Jens ; https://orcid.org/   +2 more
core   +1 more source

Impact of Solar Inverter Dynamics during Grid Restoration Period on Protection Schemes Based on Negative-Sequence Components

open access: yesEnergies, 2022
The growing penetration of renewable resources such as wind and solar into the electric power grid through power electronic inverters is challenging grid protection.
Almir Ekic, Di Wu, John N. Jiang
doaj   +1 more source

Ultra Logconcave Sequences and Negative Dependence

open access: yesJournal of Combinatorial Theory, Series A, 1997
A conjecture by Pemantle, that the convolution of ultra-logconcave sequences is ultra-logconcave, is proved. This is equivalent to the statement, that a suitable negative dependence property is preserved under the operation of sampling uniformly without replacement from two finite exchangeable Bernoulli sequences.
openaire   +3 more sources

Sequence-Specific Self-Assembly of Positive and Negative Monomers with Cucurbit[8]uril Linkers

open access: yes, 2018
The self-assembly into dynamic oligomers of Cucurbit[8]­uril (CB[8]), a positive ditopic Ir­(III) bis-terpyridine complex, and a negative ditopic Fe­(II) bis-terpyridine complex flanked by four butyrate side chains was assessed to answer a seemingly ...
Eric Masson (611798)   +5 more
core   +1 more source

Home - About - Disclaimer - Privacy