Results 71 to 80 of about 7,353 (217)
基于FDTD和EMTP的特高压大跨越线路雷击暂态过程对比分析
Gaoya dianqi, 2019 大跨越线路的杆塔高、档距长,反击闪络风险高,准确分析其雷击暂态过程,对于保证特高压线路的安全运行具有重要意义。文中针对淮南—上海特高压工程南通—苏州段的大跨越输电线路,分别建立了该线路雷击暂态过程的FDTD和EMTP模型,得到了大跨越线路的杆塔横担与塔顶电压、导线电压和绝缘子串过电压,并开展了对比分析,结果表明:采用Hara提出的杆塔多波阻抗模型,EMTP计算得到的横担和塔顶电压远大于FDTD计算结果;若不考虑感应分量,EMTP计算得到的导线电压大于FDTD计算结果 ...
谢文炳 +5 more
doaj
An EMTP system level model of the PMAD DC test bed [PDF]
A power management and distribution direct current (PMAD DC) test bed was set up at the NASA Lewis Research Center to investigate Space Station Freedom Electric Power Systems issues. Efficiency of test bed operation significantly improves with a computer
Dravid, Narayan V. +2 more
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Assessing the economic performance of an environmental sustainable supply chain in reducing environmental externalities [PDF]
, 2016 This study investigates the mechanism that motivates supply chain firms to reduce environmental ex- ternalities while balancing the economic feasibility of the supply chain system under environmentally constrained circumstances in a competitive market ...
Arrow +78 more
core +1 more source
IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.This paper proposes a feature fusion method for oscillating wave signals based on multidimensional transformation. For warpage and interturn faults in transformer windings, the fault information is extracted using the oscillating wave method. By fusing optimal multifeatures from different dimensions in the time–frequency domain, this approach enables ...
Zhenyu Wu +4 more
wiley +1 more source
Liderazgo de Nivel Intermedio en Red Para la Justicia Educativa en la Formación Técnico-Profesional
International Journal of Educational Leadership and ManagementEste estudio cualitativo explora cómo las redes gestionadas por los Servicios Locales de Educación Pública (SLEP) en Chile, que son parte de la reforma Nueva Educación Pública (NEP), contribuyen al desarrollo de capacidades directivas para la justicia ...
Jennifer Ly Obregón-Reyes +1 more
doaj +1 more source
Modified electromagnetic transient model of transmission line based on rotation transformation
The Journal of Engineering, 2019 The traditional electromagnetic transient (EMT) model of transmission line is very slow for the large-scale power systems simulation due to the small step.
Shujun Yao +3 more
doaj +1 more source
Dangerous Voltages due to Direct Lightning Strike into the Communication Tower
Journal of Communications Software and Systems, 2007 This paper presents a novel technique for computing dangerous voltages due to direct lightning strike into the communication tower and associated earthing system, which is based on the use of the well-known ATP-EMTP software package.
Slavko Vujević, Petar Sarajčev
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Gaoya dianqi, 2004 采用通用的电磁暂态计算程序EMTP,对某10kV系统中由电磁式电压互感器饱和引起的铁磁谐振过电压进行了计算机仿真计算研究,计算得到了消除该铁磁谐振的阻尼电阻值范围。同时介绍了利用EMTP分析铁磁谐振现象的一般方法。
王亮, 李文艺, 施围
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Systematization of the Simulation Process of Transformer Inrush Current Using EMTP
Applied Sciences, 2019 An inrush current is generated when a transformer is energized. This current has a large magnitude and rich harmonics, thereby causing mal-operation of the protection relay.
Hun-Chul Seo, Gi-Hyeon Gwon
doaj +1 more source
Large transient fault current test of an electrical roll ring [PDF]
The space station uses precision rotary gimbals to provide for sun tracking of its photoelectric arrays. Electrical power, command signals and data are transferred across the gimbals by roll rings.
Birchenough, Arthur G., Yenni, Edward J.
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