Results 11 to 20 of about 78,969 (302)

Combination of the Methods of symmetrical components and Double Entry to Increase the Reliability of Digital Differential Relay Protection

open access: yesE3S Web of Conferences, 2018
The method of symmetrical components is one of the main methods used to calculate asymmetric modes in electric power systems. To increase the reliability of digital differential relay protection in case of asymmetric faults, a combination of symmetric ...
Kulikov Aleksandr L.   +3 more
doaj   +2 more sources

An Alternative Methodology for Quantifying Voltage Unbalance Based on the Effects of the Temperatures and Efficiency of Induction Motors

open access: yesIEEE Access, 2022
Many unbalanced voltage conditions, which produce different effects on electric equipment, are associated with the same voltage unbalance factor. This fact hinders the precise association between the values of this index and the effects of voltage ...
Marcos D. C. Silva   +1 more
doaj   +1 more source

The Influence of the Characteristics of the Medium Voltage Network on the Single Line-to-Ground Fault Current in the Resistor Grounded Neutral Networks

open access: yesDesigns, 2021
One important problem in the operation of medium voltage networks is the detection of a single-line-to-ground fault in its incipient state, when the fault resistance values are very high.
Dumitru Toader   +6 more
doaj   +1 more source

Construction and Modeling of Multi-Circuit Multi-Voltage HVAC Transmission Lines

open access: yesEnergies, 2021
A transmission network’s main objective is to continuously supply electrical energy to consumers. This article presents an analysis of the use of multi-circuit, multi-voltage overhead lines as a compromise between ensuring the system’s safe operation by ...
Agnieszka Dziendziel   +2 more
doaj   +1 more source

Analysis of the Influence of the Insulation Parameters of Medium Voltage Electrical Networks and of the Petersen Coil on the Single-Phase-to-Ground Fault Current

open access: yesEnergies, 2021
Settings of protection are essential to ensure the sensitivity and selectivity needed to detect defects. Making the correct settings requires the calculation of the fault currents with as little error as possible.
Dumitru Toader   +4 more
doaj   +1 more source

Inertial Bone Conduction: Symmetric and Anti-Symmetric Components [PDF]

open access: yesJournal of the Association for Research in Otolaryngology, 2011
Of the two pathways through which we hear, air conduction (AC) and bone conduction (BC), the fundamental mechanisms of the BC pathway remain poorly understood, despite their clinical significance. A finite element model of a human middle ear and cochlea was developed to gain insight into the mechanisms of BC hearing.
Namkeun, Kim, Kenji, Homma, Sunil, Puria
openaire   +2 more sources

Revenue Metering of Unbalanced Prosumers in Energy Communities

open access: yesIEEE Open Access Journal of Power and Energy, 2023
The presence of power generating plants owned by prosumers may lead to unbalanced bidirectional energy flows at the points of connection to the relevant distribution systems.
Jan Klusacek   +2 more
doaj   +1 more source

Electric power components estimation according to IEEE Standard 1459-2010 [PDF]

open access: yesJournal on Processing and Energy in Agriculture, 2021
In this paper, the design and implementation of a novel recursive method for the power measurement ac-cording to the IEEE Standard 1459-2010 have been described. The most important parts are adaptive band and low-pass FIR filters that extract fundamental
Kušljević Miodrag   +2 more
doaj   +1 more source

Improvement of power transformer differential protection through detection and exploitation of the negative sequence currents

open access: yesElectrical engineering & Electromechanics, 2022
Introduction. Power transformers are the most important and the most expensive equipment used in transport and distribution of electrical energy. Their failure results in huge economic losses.
M. Zitouni
doaj   +1 more source

Analysis of Direct Torque Control Response to Stator and Rotor Faults in Permanent Magnet Synchronous Machines

open access: yesEnergies, 2023
Direct-torque-control-driven permanent magnet synchronous machines eliminate the need for a position sensor while providing improved torque dynamics. However, the structure, regulation principle and nature of compensation of hysteresis-based controllers ...
Ibrahim M. Allafi, Shanelle N. Foster
doaj   +1 more source

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