Results 31 to 40 of about 1,650,409 (264)
‘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.
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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
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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
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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
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Orientable and Negative Orientable Sequences
Discrete Applied MathematicsAnalogously 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
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IEEE AccessDirectional 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
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Unbalanced and Reactive Currents Compensation in Three-Phase Four-Wire Sinusoidal Power Systems
Applied 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
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The negative sequence impedance as fault indicator in induction motors
Revista 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
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Shotgun metagenomic sequencing in culture negative microbial keratitis
European Journal of Ophthalmology, 2023 Purpose To evaluate the microbiota of culture negative Corneal Impression Membrane (CIM) microbial keratitis samples with the use of shotgun metagenomics analysis. Methods DNA of microbial keratitis samples were collected with CIM and ...
Davide Borroni +11 more
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Energies, 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
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