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Diffusion Law of Whole-Space Transient Electromagnetic Field Generated by the Underground Magnetic Source and Its Application

open access: yesIEEE Access, 2019
Mine water inrush stays as one of the major disasters in coalmine production and construction. As one of the principal methods for detecting hidden water-rich areas in coal mines, underground transient electromagnetic method (TEM) adopts the small loop ...
Jianghao Chang   +5 more
doaj   +1 more source

Electromagnetic Transient Parallel Simulation of Large-Scale New Energy Grid Connection Based on PSCAD/EMTDC

open access: yesZhongguo dianli, 2020
As the large-scale new energy is connected into the grid, the electromagnetic transient characteristics of traditional power grid have been greatly changed owing to the access of the massive power electronic components. Therefore, new requirements of the
Bin CAO   +3 more
doaj   +1 more source

Ground Transient Resistance of Underground Cables [PDF]

open access: yes, 2016
During transients involving multiconductor lines, the importance of the ground finite conductivity is well known and various techniques and expressions have been presented in literature for the inclusion of its contribution into the per unit length ...
Araneo, Rodolfo, Celozzi, Salvatore
core   +1 more source

Research on borehole transient electromagnetic positioning method of azimuthal coil scanning detection

open access: yesMeitan xuebao
The borehole transient electromagnetic method is used to detect the long-range water-bearing bodies around the borehole wall by using the advanced water exploration borehole in the heading roadway, which avoids the “one’s opinion in one hole” because the
Jiulong CHENG   +3 more
doaj   +1 more source

An improved VSG control strategy based on transient electromagnetic power compensation

open access: yesScientific Reports, 2023
Virtual synchronous generator (VSG) not only increases the inertia of grid-connected system, but also brings the problem of active power oscillation under grid disturbance.
Changwei Gao   +3 more
doaj   +1 more source

Research and Design of a Transmission System for Time-Frequency-Domain Electromagnetic Method

open access: yesIEEE Access, 2019
In electromagnetic sounding, the detection areas of time-domain and frequency-domain electromagnetic detection methods cannot be effectively connected, and the detection processes for these two methods must be implemented separately.
Gang Li   +3 more
doaj   +1 more source

Research on longitudinal resolution of loop source transient electromagnetic method

open access: yesMeikuang Anquan
The loop source transient electromagnetic method has been widely applied in the hydrogeological exploration of coal mines, such as demarcating impermeable layers, detecting waterlogged goaf areas, and evaluating hydro-geological parameters.
Tao XING   +3 more
doaj   +1 more source

Error-Driven Dynamical hp-Meshes with the Discontinuous Galerkin Method for Three-Dimensional Wave Propagation Problems

open access: yes, 2013
An hp-adaptive Discontinuous Galerkin Method for electromagnetic wave propagation phenomena in the time-domain is proposed. The method is highly efficient and allows for the first time the adaptive full-wave simulation of transient problems in three ...
Schnepp, Sascha M.
core   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

open access: yesAdvanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee   +7 more
wiley   +1 more source

Power Transmission Limits Assessment on PCC of Grid-connected Wind Power Based on Nodal Electromagnetic Transient Thevenin Equivalence

open access: yesTaiyuan Ligong Daxue xuebao
Purposes Transmission power limit exists in point of common coupling (PCC) of grid-connected wind power, when the transmission power exceeds the limit, it may lead to voltage instability and broadband oscillation problems, threatening the safety and ...
GUO Xiaolong   +4 more
doaj   +1 more source

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