Results 41 to 50 of about 2,611 (226)

A New Method to Identify Fault Current and Inrush Current on Transformer by Jiles-Atherton Model [PDF]

, 2012
[[abstract]]This paper proposes a new method of simulating transformer internal parameters based on voltage and current to detect transformer fault and Deformation.
Huang, Sy-Ruen; Liao, Chin-Wen; Chen, Hong-Tai; Wu, Chueh-Cheng
core  

Reduction of magnetizing inrush current in a delta connected transformer [PDF]

, 2008
Magnetizing inrush current in power transformer creates severe power quality problems. Energization of the transformer from the delta side of a delta-star transformer does not allow the control of neutral resistor at the time of switching the supply for ...
Ali Asghar, Basu, K. P., Asghar, Ali, K. P. Basu   +3 more
core   +1 more source

Mitigation of magnetising inrush current in three-phase power transformer [PDF]

, 2020
During energization of no-load transformers, a high and peaky current flow on the primary side which has rich second harmonics. This current is magnetising inrush current and it is generated when transformer core is driven deep into saturation.
Khosla, Anita, Anita Khosla, Mudita Banerjee, Banerjee, Mudita   +3 more
core   +2 more sources

Upper bound limit analysis of coral reef limestone cavern roof stability incorporating a tension‐shear failure mechanism with tensile‐strength cut‐off

Deep Underground Science and Engineering, EarlyView.
For the roof of coral reef limestone caverns, a novel tension‐shear composite failure mechanism was developed. The most critical tensile crack model was identified using a hybrid optimization algorithm, and the stability of the cavern roof was analyzed accordingly.
Dongsheng Xu, Chenxu Li, Chuantan Hou
wiley   +1 more source

Electronic System for Reduction of Transient Inrush Current in Transformer [PDF]

, 2022
This paper introduces a methodology to investigate controlled switching (or "Point on Wave Switching") to reduce magnetizing inrush current in Transformer.
Hammerbauer, Jiří, Štork, Milan
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Risk Assessment Study of Oil Flow Under Inrush Current on the Misoperation of Converter Transformer Gas Relay

Applied Sciences
In practical engineering, due to the residual magnetism in the iron core of the converter transformer, the inrush current is generated in the case of no-load closing, and the inrush current leads to an oil flow surge inside the converter transformer ...
Wenhao He, Zhanlong Zhang, Yu Yang, Jiatai Gao, Xichen Pei, Jun Deng, Zhicheng Pan, Jinzhuang Lv, Hongliang Yao   +8 more
doaj   +1 more source

Investigation on tunnel stability considering pipe‐roof support with transparent soil technology

Deep Underground Science and Engineering, EarlyView.
This study integrates transparent soil technology, 3D reconstruction and numerical simulation to captures the full‐field deformation of shield tunnel instability. Results demonstrate that pipe‐roof support enhances stability via the “soil‐arching barrier effect,” effectively restraining failure wedge development by extending stress transfer paths ...
Zhi Jia, Yunpeng Ji, Zhao Lu, Honghua Zhao, Limin Zhang   +4 more
wiley   +1 more source

Research on the application of direct current resistivity method in coal seam floor water inrush monitoring

Gong-kuang zidonghua, 2021
The current researches on the application of direct current resistivity method in coal seam floor water inrush monitoring mainly focus on the resistivity response characteristics of the deformation and damage of the floor, and there are few researches on
LU Jingji
doaj   +1 more source

Mechanisms of Roadway Instability and Coupled Control Technology for Working Face Passing Through Fault Zones

Energy Science &Engineering, EarlyView.
This study mainly explores the instability characteristics of roadways near faults in the working face. Taking the 51104 transportation roadway of the 51104 working face in Shengxin Coal Mine as the main research object, through theoretical analysis, borehole inspection, numerical simulation and on‐site mine pressure observation, the instability ...
Shuaifeng Yin, Yitao Yan, En Wang, Xubo Zhao, Kanglei Han   +4 more
wiley   +1 more source

Transformer Inrush Current [PDF]

, 2015
Předkládaná bakalářská práce je zaměřena na zapínací proud transformátoru, konkrétně popis vznikajícího přechodového děje, způsoby omezování zapínacího proudu a měření zapínacího proudu na zadaném transformátoru.ObhájenoThe bachelor theses is focused on ...
Pospíšil, Karel
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