Results 11 to 20 of about 114,797 (301)

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

Energies, 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, Venkata Samba Sesha Siva Sarma Dhanikonda   +1 more
doaj   +3 more sources

A Novel Fault Location Method for a Cross-Bonded HV Cable System Based on Sheath Current Monitoring [PDF]

Sensors, 2018
In order to improve the practice in the operation and maintenance of high voltage (HV) cables, this paper proposes a fault location method based on the monitoring of cable sheath currents for use in cross-bonded HV cable systems.
Mingzhen Li, Chengke Zhou, Wenjun Zhou, Chunlin Wang, Leiming Yao, Mengting Su, Xiaojun Huang   +6 more
doaj   +3 more sources

Detection of Eccentricity Faults in Five-Phase Ferrite-PM Assisted Synchronous Reluctance Machines [PDF]

Applied Sciences, 2017
Air gap eccentricity faults in five-phase ferrite-assisted synchronous reluctance motors (fPMa-SynRMs) tend to distort the magnetic flux in the air gap, which in turn affects the spectral content of both the stator currents and the ZSVC (zero-sequence ...
Carlos López-Torres, Jordi-Roger Riba, Antonio Garcia, Luís Romeral   +3 more
doaj   +5 more sources

Thruster Fault Diagnostics and Fault Tolerant Control for Autonomous Underwater Vehicle with Ocean Currents

Machines, 2022
Autonomous underwater vehicle (AUV) is one of the most important exploration tools in the ocean underwater environment, whose movement is realized by the underwater thrusters, however, the thruster fault happens frequently in engineering practice.
Qunhong Tian, Tao Wang, Bing Liu, Guangtao Ran   +3 more
doaj   +3 more sources

Open-Switch Fault Diagnosis Method in Voltage-Source Inverters Based on Phase Currents

IEEE Access, 2019
Presently, condition monitoring and fault diagnostics in the three-phase voltage-source inverter (VSI) system are already considered essential to improve maintenance efficiency and increase reliability levels.
Zhang Jian-Jian, Chen Yong, Chen Zhang-Yong, Zhou Anjian   +3 more
doaj   +3 more sources

Analysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral

Energies, 2021
The paper analyses how the characteristics of the medium-voltage network with insulated neutral and the conditions under which the single line-to-ground fault occurs (insulation condition and value of the fault resistance) influence the zero-sequence ...
Dumitru Toader, Maria Vintan, Claudiu Solea, Daniela Vesa, Marian Greconici   +4 more
doaj   +1 more source

Open-Circuit Fault-Tolerant Control of Multi-Phase PM Machines by Compensating the d-q Axes Currents

Energies, 2021
This paper presents a novel method to control sinusoidal distributed winding or sinusoidal back electromotive force (back-EMF) multi-phase permanent magnet (PM) machines under open-circuit fault conditions.
Ali Akay, Paul Lefley
doaj   +1 more source

Fault Current and Voltage Estimation for Pole-to-Pole Faults in Modular Multilevel Converter Based DC Grids Considering AC Active Power

Applied Sciences, 2021
DC short-circuit faults are one of the challenges for modular multilevel converter (MMC) based DC grid. It is vital for proper design of protection system to estimate the fault currents and voltages.
Hui Cai, Junli Zhang, Jingqiu Yu, Zheren Zhang   +3 more
doaj   +1 more source

Application of Artificial Neural Network-Based Tool for Short Circuit Currents Estimation in Power Systems With High Penetration of Power Electronics-Based Renewables

IEEE Access, 2023
The increasing integration of Power Electronics (PE)-based renewable energy sources into the electric power system has significantly affected the traditional levels and characteristics of fault currents compared to the ones observed in power systems ...
Rafat Aljarrah, Murad Al-Omary, Dua'a Alshabi, Qusay Salem, Sahban Alnaser, Dragan Cetenovic, Mazaher Karimi   +6 more
doaj   +1 more source

The use of phase voltage modules to select the damaged phase in case of single-phase earth faults

Омский научный вестник, 2023
In case of short circuits, the selection of damaged phases always precedes the determination of the damage location. To select the damaged phase, filter selector of the damaged phase are widely used, using symmetrical components of phase currents.
V. A. Shabanov, A. V. Sorokin
doaj   +1 more source