Results 1 to 10 of about 239,087 (202)

Auxiliary Sensor-Based Borehole Transient Electromagnetic System for the Nondestructive Inspection of Multipipe Strings

open access: yesSensors, 2017
Transient electromagnetic (TEM) techniques are widely used in the field of geophysical prospecting. In borehole detection, the nondestructive inspection (NDI) of a metal pipe can be performed efficiently using the properties of eddy currents.
Bo Dang   +6 more
doaj   +4 more sources

A Uniform Linear Multi-Coil Array-Based Borehole Transient Electromagnetic System for Non-Destructive Evaluations of Downhole Casings

open access: yesSensors, 2018
Borehole transient electromagnetic (TEM) techniques have been proven to be efficient for nondestructive evaluations (NDEs) of metal casings using eddy-current properties.
Bo Dang   +6 more
doaj   +2 more sources

A Comprehensive Review on Transient Recovery Voltage in Power Systems: Models, Standardizations and Analysis

open access: yesEnergies, 2023
Electrical power systems are exposed to transient disturbances that change the voltage and current signals of the network, which can interrupt power and damage equipment.
Eleonora Fripp Lazzari   +9 more
doaj   +2 more sources

High Frequency Numerical Solution to Evaluate the Impedance of the Vertical Grounding Electrode Using an Accurate Mathematical Approach [PDF]

open access: yesAUT Journal of Electrical Engineering, 2021
Considering the air/earth interface to compute the electromagnetic field at the desired point is the most important problem in transient analysis of grounding system buried to lossy media like earth.
Abdolmanaf Kose Ghravi   +2 more
doaj   +1 more source

Calculation of the Combined Electric Field Response of Multiple Nonlinear Antenna Loads due to HPEM Excitation [PDF]

open access: yesAdvances in Radio Science, 2023
The electromagnetic properties of receiving and scattering structures with nonlinear components are difficult to predict, especially if more than one nonlinear load is involved.
R. Michels   +3 more
doaj   +1 more source

Active Cable Sheath Current-Based Protection Scheme for an Offshore HVAC Wind Transmission System

open access: yesFrontiers in Energy Research, 2022
Due to the complex sending terminal structure of offshore wind transmission systems, conventional on-line monitoring-based protection cannot work well. The electromagnetic transient faults are also difficult to locate due to a short time span with fast ...
Yang Zhao   +3 more
doaj   +1 more source

A Correlation-Based Electromagnetic Time Reversal Technique to Locate Indoor Transient Radiation Sources

open access: yesIEEE transactions on microwave theory and techniques, 2021
To overcome the multipath interference in locating transient electromagnetic (EM) radiation sources in an indoor environment, we propose a criterion that calculates the correlation between back-propagated signals from observation points, to be used in EM
Qi Li   +4 more
semanticscholar   +1 more source

DPsim—Advancements in Power Electronics Modelling Using Shifted Frequency Analysis and in Real-Time Simulation Capability by Parallelization

open access: yesEnergies, 2020
Real-time simulation is an increasingly popular tool for product development and research in power systems. However, commercial simulators are still quite exclusive due to their costs and they face problems in bridging the gap between two common types of
Markus Mirz   +2 more
doaj   +1 more source

Space-Time-Parallel 3-D Finite Element Transformer Model With Adaptive TLM and Parareal Techniques for Electromagnetic Transient Analysis

open access: yesIEEE Open Journal of Industry Applications, 2021
In this paper, a novel massively space-time parallel finite element (FE) transformer model is proposed for power system electromagnetic transient simulations.
Jiacong Li, Peng Liu, Venkata Dinavahi
doaj   +1 more source

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