Results 11 to 20 of about 20,169 (264)

Application of Transient Electromagnetic Method in Detection of Goaf

open access: yesMeikuang Anquan, 2020
To study the method of using transient electromagnetic method to detect the goaf of the integrated mine, on the basis of studying the principle of transient electromagnetic method and investigating the background noise, the goaf in the industry square ...
SUN Yingfeng, LUO Xiao, GAO Yirui, WANG Pengpeng, DONG Chuanlong, HE Yongchang
doaj   +1 more source

Hybrid Simulation for Large-Scale AC/DC Power System by Serial Interaction Process

open access: yesFrontiers in Energy Research, 2021
Electromechanical transient (EMT) and transient stability hybrid simulations can make full use of their fast-solving ability and high-precision computing ability to accurately simulate the dynamic characteristics of large-scale AC/DC systems.
Song Zhang   +3 more
doaj   +1 more source

TACS enhancements for the Electromagnetic Transient Program [PDF]

open access: yesConference Proceedings Power Industry Computer Application Conference, 1993
Transient analysis of control systems (TACS) of the electromagnetic transient program (EMTP) has been enhanced in many ways. There are major changes in methods of ordering components to minimize the introduction of time step and history term errors. Initialization algorithms have been greatly enhanced to allow multiple frequency initialization.
R.H. Lasseter, J. Zhou
openaire   +1 more source

Electromagnetic transient analysing of neutral bus in UHVDC converter station

open access: yesThe Journal of Engineering, 2019
Transient processes at neutral bus of ultra-high value direct current (UHVDC) converter station received insufficient attention, because of the lower amplitude compare to poles.
Yunchao Wang   +7 more
doaj   +1 more source

Electromagnetic transient characteristics and overvoltage suppression strategy of renewable energy-oriented power system connected by gas-insulated transmission lines

open access: yesFrontiers in Energy Research, 2022
New energy systems, such as wind power and photovoltaic and distributed power supply, in the power generation and grid-connected transmission system basically will use stronger insulation design, higher operational safety, and smaller footprint GIL ...
Guang Yang   +4 more
doaj   +1 more source

ELECTROMAGNETIC PARAMETERS OF PLANE CONTACTS UNDER SHORT CIRCUIT CONDITIONS

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2003
Investigations of electromagnetic parameters of various aluminium plane contacts under short circuit conditions have been carried out. It has been revealed that while calculating electromagnetic parameters of the above-mentioned contacts under transient ...
A. N. Gerasimovich   +4 more
doaj   +1 more source

Transient analysis of power loss density with time-harmonic electromagnetic waves in Debye media

open access: yesRoyal Society Open Science, 2021
Due to the complex permittivity, it is difficult to directly clarify the transient mechanism between electromagnetic waves and Debye media. To overcome the above problem, the temporal relationship between the electromagnetic waves and permittivity is ...
Jiaqi Zhong   +3 more
doaj   +1 more source

Modelling and Operation Analysis of Electromechanical Transient- Electromagnetic Transient Hybrid System

open access: yesChemical Engineering Transactions, 2017
The electromechanical-electromagnetism hybrid simulation technology combines the advantages of electromechanical transient simulation and electromagnetic transient simulation.
Fengling Fang
doaj   +1 more source

Hierarchical Device-Level Modular Multilevel Converter Modeling for Parallel and Heterogeneous Transient Simulation of HVDC Systems

open access: yesIEEE Open Journal of Power Electronics, 2020
System-level electromagnetic transient (EMT) simulation of large-scale power converters with high-order nonlinear semiconductor switch models remains a challenge albeit it is essential for design preview. In this work, a multi-layer hierarchical modeling
Ning Lin, Ruimin Zhu, Venkata Dinavahi
doaj   +1 more source

Research on the development height of water-conducting fracture zone in overburden rock based on transient electromagnetic method in hole

open access: yesMeikuang Anquan
Transient electromagnetic method has shown great effectiveness in detecting water channels. However, conventional methods for detecting the development of water-conducting fracture zones are not suitable due to environmental influences.
Qinghua LIANG   +5 more
doaj   +1 more source

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