Results 31 to 40 of about 29,243 (264)

A Pilot Directional Protection for HVDC Transmission Line Based on Relative Entropy of Wavelet Energy

Entropy, 2015
On the basis of analyzing high-voltage direct current (HVDC) transmission system and its fault superimposed circuit, the direction of the fault components of the voltage and the current measured at one end of transmission line is certified to be ...
Sheng Lin, Shan Gao, Zhengyou He, Yujia Deng   +3 more
doaj   +1 more source

Research of influence of open-winding faults on properties of brushless permanent magnets motor

Open Physics, 2017
The paper presents an analysis of influence of selected fault states on properties of brushless DC motor with permanent magnets. The subject of study was a BLDC motor designed by the authors for unmanned aerial vehicle hybrid drive.
Bogusz Piotr, Korkosz Mariusz, Powrózek Adam, Prokop Jan, Wygonik Piotr   +4 more
doaj   +1 more source

Fast single-end line protection method for the meshed multi-terminal HVDC grid

The Journal of Engineering, 2019
In view of the short-circuit fault characteristics, the protection technique of the dc lines limits the development of the modular multi-level converter (MMC)-based HVDC grid in a large extent. This study derives the calculation formulas of the transient
Qiang Huang, Guibin Zou, Chunhua Xu, Jie Zhang, Shuo Zhang   +4 more
doaj   +1 more source

Novel Fault Protection Method for Flexible DC Power Systems

Energies
A fault protection method is proposed for flexible direct-current (DC) power systems based on the cosine similarity of currents in current-limiting reactors.
Genqi Chen, Qing Duan, Caihong Zhao, Haoqing Wang, Guanglin Sha, Jian Gao, Yong Li, Shuiliang Zhou   +7 more
doaj   +1 more source

Detailed Simulation of Transformer Internal Fault in Power System by Diakoptical Concept

Advances in Electrical and Computer Engineering, 2010
This paper presents a novel method for modeling internal faults in a power transformer. This method uses a distributed computing approach for analysis of internal fault in transient stability (T/S) studies of electrical networks using Diakoptics and ...
KOUHSARI, S. M., KOOCHAKI, A.
doaj   +1 more source

A Fault Attack on the Family of Enocoro Stream Ciphers

Cryptography, 2021
A differential fault attack framework for the Enocoro family of stream ciphers is presented. We only require that the attacker can reset the internal state and inject a random byte-fault, in a random register, during a known time period.
Julian Danner, Martin Kreuzer
doaj   +1 more source

Deep Learning-Based Algorithm for Internal Fault Detection of Power Transformers during Inrush Current at Distribution Substations

Energies
The reliability and stability of differential protection in power transformers could be threatened by several types of inferences, including magnetizing inrush currents, current transformer saturation, and overexcitation from external faults.
Sopheap Key, Gyu-Won Son, Soon-Ryul Nam
doaj   +1 more source

Shear behavior of bedding fault material on the basal layer of DGB landslide

Scientific Reports, 2023
Daguangbao (DGB) Landslide (12 × 108 m3) is the largest landslide triggered by the 2008 Ms8.0 Wenchuan Earthquake, in which basal shear failure develops on an interlayer fault at 400 m deep under the ground.
Yufei Liang, Shenghua Cui, Xiangjun Pei, Ling Zhu, Hui Wang, Qingwen Yang   +5 more
doaj   +1 more source

Deep Learning-Based Classification of Transformer Inrush and Fault Currents Using a Hybrid Self-Organizing Map and CNN Model

Energies
Accurate classification between magnetizing inrush currents and internal faults is essential for reliable transformer protection and stable power system operation. Because their transient waveforms are so similar, conventional differential protection and
Heungseok Lee, Sang-Hee Kang, Soon-Ryul Nam   +2 more
doaj   +1 more source

Fault Diagnosis for Modular Multilevel Converter Switching Devices via Multimodal Attention Fusion

IEEE Access, 2023
Modular multilevel converters (MMCs) have been widely applied in high voltage direct current (HVDC) transmission project, and security is their fundamental issue.
Longzhang Ke, Guozhen Hu, Yuqing Yang, Yi Liu   +3 more
doaj   +1 more source