Results 31 to 40 of about 7,577,252 (286)

Controllable reactor based hybrid HVDC breaker

open access: yesHigh Voltage, 2020
Short circuit fault occurrence in high-voltage DC (HVDC) systems causes extremely high currents in a fast raising time that does not experience current zero-crossing.
Amir Heidary   +4 more
doaj   +1 more source

A Novel Transient Fault Current Sensor Based on the PCB Rogowski Coil for Overhead Transmission Lines

open access: yesSensors, 2016
The accurate detection of high-frequency transient fault currents in overhead transmission lines is the basis of malfunction detection and diagnosis.
Yadong Liu   +5 more
doaj   +1 more source

Research on Access Mode of the Flexible DC Power Distribution System into AC System

open access: yesEnergies, 2019
The connection mode of the direct current (DC) power distribution system and the alternating current (AC) system is the foundation of system design, and it is also one of key technologies of the DC power distribution network.
Yao Liu   +5 more
doaj   +1 more source

A Practical Protection Coordination Strategy Applied to Secondary and Facility Microgrids

open access: yesEnergies, 2012
In a conventional distribution system, protection algorithms are designed to operate on a unidirectional high fault-current level. In a microgrid, a fault current from distributed generation (DG) may bring about a relay malfunction because of the ...
Woo-Kyu Chae   +5 more
doaj   +1 more source

Bridging the Loneliness Gap: Depression, Connectivity, and Isolation in Pediatric Oncology Patients and Their Peers

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Loneliness is associated with adverse physical and mental health outcomes and remains understudied in children and adolescents undergoing cancer therapy. Pediatric oncology patients may be at increased risk due to medical isolation and disruption of social networks.
Charlotte N. Stahlfeld   +5 more
wiley   +1 more source

Vectorial Approach Based Control of a Seven-Phase Axial Flux Machine Designed for Fault Operation [PDF]

open access: yes, 2008
Version éditeur disponible à l'adresse suivante : http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4519973&isnumber=4636792This paper deals with easy-to-implement control strategies when a seven-phase axial flux permanent magnet machine supplied ...
LOCMENT, Fabrice   +5 more
core   +2 more sources

A Novel Analytical Method of Inductance Identification for Direct Drive PMSM with a Stator Winding Fault Considering Spatial Position of the Shorted Turns

open access: yesApplied Sciences, 2019
This paper presents a novel analytical method (NAM) of inductance identification for a direct drive permanent magnet synchronous motor (DDPMSM) with a stator winding fault (SWF), which considers the spatial position of the shorted turns.
Caixia Gao   +4 more
doaj   +1 more source

Early Body Mass Index z‐Score Change and Resolution of Severe Malnutrition in Children With Sickle Cell Anemia in a Low‐Income Setting: A Prospective Single‐Arm Extension Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with sickle cell anemia (SCA) in low‐income settings are at risk of severe malnutrition, but optimal nutritional management has not been established. We evaluated an intensified ready‐to‐use therapeutic food (RUTF) regimen in children with persistent severe malnutrition after initial treatment and assessed whether early ...
Safiya Gambo   +9 more
wiley   +1 more source

Transient Analysis to Distinguish Mechanically Switched Capacitors Using Discrete Wavelet Transform and Artificial Intelligence

open access: yesIEEE Access
Capacitor banks are widely used in modern power systems for reactive power compensation and voltage regulation. However, switching operations of mechanically switched capacitors (MSCs) can generate transient phenomena, such as inrush currents, which may ...
Surakit Thongsuk   +6 more
doaj   +1 more source

Fault distance estimation-based protection scheme for DC microgrids

open access: yesThe Journal of Engineering, 2019
The DC microgrid has become a typical distribution network due to its excellent performances. However, a well-designed protection scheme still remains to be a challenge for DC microgrids.
Lin Zhang   +3 more
doaj   +1 more source

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