Results 1 to 10 of about 11,373,640 (309)

Testing Sensitivity of A-Type Residual Current Devices to Earth Fault Currents with Harmonics [PDF]

Sensors (Basel), 2020
In many applications, modern current-using equipment utilizes power electronic converters to control the consumed power and to adjust the motor speed. Such equipment is used both in industrial and domestic installations.
S. Czapp
semanticscholar   +2 more sources

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   +2 more sources

Divergence Distance Based Index for Discriminating Inrush and Internal Fault Currents in Power Transformers

IEEE transactions on industrial electronics (1982. Print), 2022
This article puts forward a new algorithm based on Kullback–Leibler divergence (KLD) for discriminating inrush and internal fault currents in power transformers.
Mohsen Tajdinian, H. Samet
semanticscholar   +1 more source

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

A steady‐state analysis method for pole‐to‐pole faults under different transition resistances in voltage source converter‐based DC systems

IET Generation, Transmission & Distribution, 2021
Fault analysis is an essential prerequisite for fault detection, location and isolation. A detailed fault analysis method on the steady state of the pole‐to‐pole fault for voltage source converter (VSC) based DC systems is presented in this paper ...
Zhengguang Xiao, Xiaodong Zheng, Nengling Tai, Chunju Fan, Yangyang He   +4 more
doaj   +1 more source

A New Theory for Locating Line Fault in Power System: Simulation Part

IEEE Access, 2019
Three time-reversal-based fault location methods are derived from the theoretical part of this paper, which is named currents-in-time-domain method, forward-currents-in-frequency-domain method, and forward-currents-in-frequency-domain-with-compensation ...
Xipeng Zhang, Nengling Tai, Pan Wu, Chunju Fan, Xiaodong Zheng, Wentao Huang   +5 more
doaj   +1 more source