Results 21 to 30 of about 240,369 (344)

Application of the modified Cagniard technique to transient electromagnetic diffusion problems [PDF]

open access: yesGeophysical Journal International, 1988
Summary: A version of Cagniard's technique for inverting integral transforms is adapted to diffusion problems and illustrated with the 2-D example of two semi-infinite media of different electrical conductivity excited by a transient line-source of electric current at their interface.
de Hoop, A. T., Oristaglio, M. L.
openaire   +2 more sources

Detection of cracks in metal sheets using pulsed laser generated ultrasound and EMAT detection [PDF]

open access: yes, 2011
A pulsed Nd: YAG laser with an approximately Gaussian beam shape is directed onto the surface of an aluminium sheet at an energy density below which damage by laser ablation occurs, generating Lamb waves in the sheet.
Dixon, S.   +3 more
core   +1 more source

High-Energy Alerts in the Multi-Messenger Era

open access: yesUniverse, 2021
The observation of electromagnetic counterparts to both high energy neutrinos and gravitational waves marked the beginning of a new era in astrophysics.
Daniela Dorner   +2 more
doaj   +1 more source

Direct time-domain techniques for transient radiation and scattering. [Introduction to transient electromagnetics] [PDF]

open access: yes, 1976
A tutorial introduction to transient electromagnetics, focusing on direct time-domain techniques, is presented. Physical, mathematical, numerical, and experimental aspects of time-domain methods, with emphasis on wire objects excited as antennas or scatters are examined.
Miller, E. K., Landt, J. A.
openaire   +2 more sources

A Control Strategy for Electromagnetic Transient in Renewable Energy Systems Based on Virtual Synchronous Generation [PDF]

open access: yes, 2023
With the popularity of clean energy utilization and the in-depth development of microgrids, virtual synchronous power generation technology has received more and more attention.
Chen, Hao; id_orcid, Zhang, Qixia
core   +1 more source

Interfacing Techniques for Transient Stability and Electromagnetic Transient Programs

open access: yes, 2009
Transient stability (TS) and electromagnetic transient (EMT)programs are widely used simulation tools in power systems, with distinct applications but competing requirements. TS programs are fast which makes them suitable for handling large-scale networks, however, the modeling is not sufficiently detailed.
openaire   +4 more sources

Large-signal modeling of three-phase dual active bridge converters for electromagnetic transient analysis in DC grids

open access: yesJournal of Modern Power Systems and Clean Energy, 2019
The three-phase dual active bridge (3p-DAB) converter is widely considered in next-generation DC grid applications. As for traditional AC grids, the successful integration of power electronic converters in DC grids requires accurate time-domain system ...
Maxime Berger   +3 more
doaj   +1 more source

Computation of transient electromagnetic fields due to switching in high voltage substations

open access: yes, 2010
Switching operations of circuit breakers and disconnect switches radiate transient electromagnetic fields within high-voltage substations. The generated fields may interfere and disrupt normal operations of electronic equipment.
Siew, W.H., Musa, B.U., Judd, M.D.
core   +1 more source

Investigating the Effect of Several Model Configurations on the Transient Response of Gas-Insulated Substation during Fault Events Using an Electromagnetic Field Theory Approach

open access: yesEnergies, 2020
Assessment of very fast transient overvoltage (VFTO) requires good knowledge of the behavior of gas-insulated substation when subjected to very high frequencies.
Muresan Alexandru   +4 more
doaj   +1 more source

On the Numerical Accuracy of Electromagnetic Transient Simulation With Power Electronics

open access: yesIEEE Transactions on Power Delivery, 2018
This paper investigates the numerical accuracy of currently employed methods for electromagnetic transient simulation with power electronics. Existing tools often employ the second-order accurate trapezoidal method for numerical integration.
J. Tant, J. Driesen
semanticscholar   +1 more source

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