Results 11 to 20 of about 21,770 (303)

Development of a Novel Control Scheme to Achieve the Minimum Unbalance Factor and Real Power Fluctuations under Asymmetrical Faults

open access: yesEnergies, 2023
The increasing share of converter-based renewable energy sources in the power system has forced the system operators to demand voltage support from the converters in case of faults.
Muhammad Abubakar   +2 more
doaj   +1 more source

Assessing Asymmetric Fault-Tolerant Software [PDF]

open access: yes2010 IEEE 21st International Symposium on Software Reliability Engineering, 2010
The most popular forms of fault tolerance against design faults use "asymmetric" architectures in which a "primary" part performs the computation and a "secondary" part is in charge of detecting errors and performing some kind of error processing and recovery. In contrast, the most studied forms of software fault tolerance are "symmetric" ones, e.g.
Peter T. Popov, Lorenzo Strigini
openaire   +2 more sources

Fault Current Characteristics of the DFIG under Asymmetrical Fault Conditions [PDF]

open access: yesEnergies, 2015
During non-severe fault conditions, crowbar protection is not activated and the rotor windings of a doubly-fed induction generator (DFIG) are excited by the AC/DC/AC converter. Meanwhile, under asymmetrical fault conditions, the electrical variables oscillate at twice the grid frequency in synchronous dq frame.
Fan Xiao, Zhe Zhang, Xianggen Yin
openaire   +2 more sources

Study of Subsurface Structural Image and Model Using 2D Seismic Reflection Method of Injana Field Area, Northeastern Iraq

open access: yesIraqi Geological Journal, 2022
The Injana field area is located to the north of Baquba city within Diyala. which was studied and interpreted by using 2D seismic data from the Oil Exploration Company.
Mustafa Ahmed   +2 more
doaj   +1 more source

Finite-Control-Set Model Predictive Control for Low-Voltage-Ride-Through Enhancement of PMSG Based Wind Energy Grid Connection Systems

open access: yesMathematics, 2022
Grid faults are found to be one of the major issues in renewable energy systems, particularly in wind energy conversion systems (WECS) connected to the grid via back-to-back (BTB) converters.
Syed Wajahat Ali   +6 more
doaj   +1 more source

Fault Ride Through and Intermittency Improvement of Renewable Energy Integrated MMC-HVDC System Employing Flywheel Energy Storage

open access: yesIEEE Access, 2023
Modular multilevel converter (MMC)-based high voltage direct current (HVDC) transmission networks integrate remotely located distributed renewable energy resources (RER). The intermittent nature of RER and symmetrical and asymmetrical AC-side low-voltage
Md Ismail Hossain   +4 more
doaj   +1 more source

Analytical Model of Induction Machines with Multiple Cage Faults Using the Winding Tensor Approach

open access: yesSensors, 2021
Induction machines (IMs) are one of the main sources of mechanical power in many industrial processes, especially squirrel cage IMs (SCIMs), due to their robustness and reliability.
Javier Martinez-Roman   +5 more
doaj   +1 more source

Synchronization method for grid integrated battery storage systems during asymmetrical grid faults [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2017
This paper aims at presenting a robust and reliable synchronization method for battery storage systems during asymmetrical grid faults. For this purpose, a Matlab/Simulink based model for testing of the power electronic interface between the ...
Popadić Bane   +4 more
doaj   +1 more source

Identification and location method of asymmetric faults in coal mine power network

open access: yesGong-kuang zidonghua, 2018
Three asymmetrical faults of singe-phase grounding, singe-phase line breakage and ferroresonance in coal mine power network are easily misjudged, and existing methods hardly identify the three faults correctly.
WANG Qingliang, QIN Jie, LIU Xinru
doaj   +1 more source

Analysis of drawbacks and constraints of classification algorithms for three-phase voltage dips [PDF]

open access: yes, 2018
Voltage events are one of the most common and harmful disturbances of power electric systems. Voltage dips, swells and interruptions are included under this heading.
Carrica, Daniel Oscar   +5 more
core   +1 more source

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