Results 51 to 60 of about 147,643 (299)

Power System Impedance Estimation Using a Fast Voltage and Current Changes Measurements

open access: yesEnergies, 2020
Equivalent power system impedance is an important electrical quantity from many points of view. Areas in which this parameter plays an important role include, in particular: Voltage stability analysis, power quality, or fault condition analysis.
Martin Kanálik   +3 more
doaj   +1 more source

Three Phase Linear State Estimation Method of Substation Based on Zero Impedance Model

open access: yesIEEE Access, 2023
In order to improve the ability to detect and identify topological errors and measurement errors, and further enhance the rapidity and reliability of substation state estimation, this paper proposes a three-phase linear state estimation method for ...
Jifang Li   +4 more
doaj   +1 more source

Short-time homomorphic wavelet estimation

open access: yes, 2013
Successful wavelet estimation is an essential step for seismic methods like impedance inversion, analysis of amplitude variations with offset and full waveform inversion.
Herrera R van der Baan M   +6 more
core   +1 more source

System configuration, fault detection, location, isolation and restoration: a review on LVDC Microgrid protections [PDF]

open access: yes, 2019
Low voltage direct current (LVDC) distribution has gained the significant interest of research due to the advancements in power conversion technologies. However, the use of converters has given rise to several technical issues regarding their protections
Bououden   +11 more
core   +1 more source

Observer techniques for estimating the state-of-charge and state-of-health of VRLABs for hybrid electric vehicles [PDF]

open access: yes, 2005
The paper describes the application of observer-based state-estimation techniques for the real-time prediction of state-of-charge (SoC) and state-of-health (SoH) of lead-acid cells.
Bentley, P   +3 more
core   +1 more source

Active Fault Detection Device for LV Electrical Installations with Goertzel-Based Impedance Estimation and IoT Connectivity

open access: yesEngineering Proceedings
An active (harmonic-injection based) fault detection device, relevant to low voltage electrical installations is studied in this paper. This compact and flexible device is compatible with TN/TT earthing systems, and it is capable of detecting power theft
Christos Pechlivanis   +5 more
doaj   +1 more source

Modeling and Emulating a Physiotherapist's Role in Robot‐Assisted Rehabilitation

open access: yesAdvanced Intelligent Systems, 2020
In home‐based rehabilitation, one possible approach is haptic teleoperation in which a hospital‐based therapist is haptically linked and tele‐presented to a home‐based patient to effectively simulate traditional in‐hospital therapies over a distance.
Ran Tao   +4 more
doaj   +1 more source

A method for automated bolt-loosening monitoring and assessment using impedance technique and deep learning

open access: yesDevelopments in the Built Environment, 2023
Traditional impedance-based bolt-looseness monitoring approaches using hand-crafted impedance features can lead to difficulties in quantitative damage severity estimation.
Thanh-Truong Nguyen   +4 more
doaj   +1 more source

M\"{o}bius deconvolution on the hyperbolic plane with application to impedance density estimation [PDF]

open access: yes, 2010
In this paper we consider a novel statistical inverse problem on the Poincar\'{e}, or Lobachevsky, upper (complex) half plane. Here the Riemannian structure is hyperbolic and a transitive group action comes from the space of $2\times2$ real matrices of ...
Huckemann, Stephan F.   +3 more
core   +1 more source

On the Detection of Neutral Loss, Islanding, and Meter Tampering in Electrical Installations

open access: yesIEEE Open Journal of the Industrial Electronics Society
Neutral conductor loss on the upstream network of an electrical installation, as well as unintentional islanding operation, are two critical issues directly related to the safety of both human life and equipment of the electrical installation ...
Syllas Frantzeskakis   +3 more
doaj   +1 more source

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