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Transformer Internal Faults Simulation

open access: yesAdvances in Electrical and Computer Engineering, 2008
This paper presents a novel method of modeling internal faults in a power transformer. The method leads to a model which is compatible with commercial phasor-based software packages. Consequently; it enables calculation of fault currents in any branch of
KOOCHAKI, A.   +2 more
doaj   +2 more sources

Differential Protection of ISPST Using Chebyshev Neural Network ‎ [PDF]

open access: yesJournal of Operation and Automation in Power Engineering, 2023
An Indirect Symmetrical Phase Shift Transformer (ISPST) represents both electrically connected and magnetically coupled circuits, which makes it unique compared to a power transformer.
S. K. Bhasker   +3 more
doaj   +1 more source

Development and Validation of a Special Protection System for Internal Fault in a High-Power Three-Level NPC VSC

open access: yesEnergies, 2021
This paper describes the development and validation of an innovative protection system based on medium-voltage fuses for a high-power switching conversion system.
Mattia Dan   +5 more
doaj   +1 more source

Influence analysis of principal stress deflection on fault stability based on theory of internal and external stress fields

open access: yesMeikuang Anquan, 2021
To explore principal stress deflection effect on the stability of fault, based on the theory of internal stress field, the reason of principal stress deflection is explained, the mechanical structure model is established to calculate the internal and ...
DONG Shuangyong, LI Wenzhou
doaj   +1 more source

Fault Tolerant Control in Shape-Changing Internal Robots [PDF]

open access: yes2020 IEEE International Conference on Robotics and Automation (ICRA), 2020
It is known that the interior of the human body is one of the most adverse environments for a foreign body, such as an in-vivo robot, and vice-versa. As robots operating in-vivo are increasingly recognized for their capabilities and potential for improved therapies, it is important to ensure their safety, especially for long term treatments when little
Balasubramanian, L.   +2 more
openaire   +2 more sources

A Location Method for AC Fault in LCC-HVDC System Based on Virtual Conduction Width Characteristics

open access: yesIEEE Access, 2023
When an AC fault occurs in HVDC transmission system, the transient response change in the rate of change of current and voltage, which may lead to the unexpected action behavior of converter protection.
Shanshan Yin
doaj   +1 more source

Supersonic dislocations observed in a plasma crystal [PDF]

open access: yes, 2007
Experimental results on the dislocation dynamics in a two-dimensional plasma crystal are presented. Edge dislocations were created in pairs in lattice locations where the internal shear stress exceeded a threshold and then moved apart in the glide plane ...
C. Kittel   +5 more
core   +2 more sources

Adaptive fault-tolerant control for electro-hydraulic servo actuator based on multiple unmodeled dynamics estimation and compensation

open access: yesXibei Gongye Daxue Xuebao, 2023
The internal leakage fault-tolerant control problem of the electro-hydraulic servo actuator under the influence of multiple unmodeled dynamics is investigated in this paper, and an adaptive fault-tolerant control scheme based on unmodeled dynamics ...
LI Ting   +4 more
doaj   +1 more source

Discrimination of Transformer Inrush Currents and Internal Fault Currents Using Extended Kalman Filter Algorithm (EKF)

open access: yesEnergies, 2021
The discrimination of inrush currents and internal fault currents in transformers is an important feature of a transformer protection scheme. The harmonic current restrained feature is used in conventional differential relay protection of transformers. A
Sunil Kumar Gunda   +1 more
doaj   +1 more source

Robust Fault-Tolerant Control of an Electro-Hydraulic Actuator With a Novel Nonlinear Unknown Input Observer

open access: yesIEEE Access, 2021
In this paper, a novel adaptive fault-tolerant controller is proposed for a typical electro-hydraulic rotary actuator in the presence of disturbances, internal leakage fault, and sensor fault simultaneously.
Van Du Phan   +3 more
doaj   +1 more source

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