Results 101 to 110 of about 7,136,886 (221)

An inrush current model for core type transformers

, 1997
A detailed mathematical model based on circuit approach has been developed for simulating inrush current for core type transformers. The model is capable of computing inrush current for various phase connection schemes under different initial conditions.
Farzadfar, Iraj
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Unified Algorithm Based on Rotating Phasors for Accurate Detection of Inrush Currents in Three-Phase Transformers

IEEE Access
The detection of inrush currents is vital for transformer differential protection. The mainstream method for detecting inrush current is based on the second harmonic content of the differential current.
Jimin Chai, Shuyan Pan
doaj   +1 more source

Sympathetic inrush currents in transformer energisation

, 2018
Power transformers are critical components of the electricity networks. It is common knowledge that transformer energisation causes a number of slow-front inrush current transient problems. With the increase of distributed generations with inherent high intermittency resulting in more switching events, the transformers in service are increasingly ...
openaire   +2 more sources

A New Current-Based Technique for Discrimination between Internal Faults and Inrush Current within Power Transformers

, 2015
Inrush current may lead to a false operation of the power transformer differential protection relay. Hence, it is very essential to distinguish inrush current from various internal transformer faults in order to improve the reliability of the ...
Abu-Siada, Ahmed, El Mola, K., Mahmoud, A., El-Naggar, M.   +3 more
core   +1 more source

Research on optimization strategy of differential protection for inrush current in converter transformer considering magnetic flux restraint

AIP Advances
The converter transformer is a critical component of the HVDC transmission system and its operational stability is essential for the overall safety of the power grid.
Ran Deng, Haotian Kong, Liangchuang Li, Changan Lu, Ao Xu, Chenguang Wang   +5 more
doaj   +1 more source

A Study on Excitation Inrush Current and Overvoltage Mitigation Strategies Utilizing Phase Selection Control

Energies
To address the challenges of system failures and equipment damage caused by excitation inrush currents and overvoltages during no-load energization of high-speed locomotive transformers, a simulation model was developed utilizing PSCAD electromagnetic ...
Junting Yan, Qingfeng Wang, Jianqiong Zhang, Xiangqiang Li   +3 more
doaj   +1 more source

Pengaruh Cara Pemotongan Inti Transformator Terhadap Kurva Magnetisasi Dan Inrush Current [PDF]

, 2015
Telah banyak dilakukan studi mengenai fenomena inrush current. Inrush current merupakan fenomena yang terjadi pada saat transformator pertama kali diberikan sumber tegangan.
Ksatria, Arief Budi
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Wavelet Transforms Based Power Transformer Protection from Magnetic Inrush Current [PDF]

, 2015
The Power transformer is the very essential element in the power systems. For wealthy running operation of power transmission and distribution, the transformer set-up is indispensable.
Soundiraraju, P., Loganathan, N.
core  

Mitigation of Magnetizing Inrush Current using Sequential Phase Energization Technique

, 1970
Energization of a transformer under no load or lightly loaded conditions may result in inrush current with high amplitude that can be comparable with the fault currents.
M. Jamali, S. Asghar-Gholamian, M. Mirzaie   +2 more
core   +1 more source

Desempenho da proteção diferencial em transformadores de potência perante condições especiais de operação [PDF]

, 2012
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia ElétricaRelés digitais vêm gradualmente substituindo os relés eletromecânicos porque são mais sensíveis, mais flexíveis e várias ...
Verney, Luiz Henrique Costa de
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