Results 201 to 210 of about 10,677,552 (246)

Numerical modelling of transformer inrush currents

2012 IEEE International Energy Conference and Exhibition (ENERGYCON), 2012
This paper presents an application of a vector hysteresis model to the prediction of the inrush current due the arbitrary initial excitation of a transformer after a fault. The approach proposed seems promising in order to predict the transient overshoot in current and the optimal time to close the circuit after the fault.
CARDELLI, Ermanno, FABA, Antonio
openaire   +3 more sources

A Simplified Phase-Controlled Switching Strategy for Inrush Current Reduction

IEEE Transactions on Power Delivery, 2021
High inrush current severely threats the safe operation of the power system and transformers, which may lead to mal-operation of overcurrent protection device, internal short-circuit fault in transformers.
Haimiao Ni, S. Fang, Heyun Lin
semanticscholar   +1 more source

A Saturated Amorphous Alloy Core-Based Inrush Current Limiter to Eliminate Inrush Currents and Restrain Harmonics during Transformer Energization

IEEE transactions on industry applications, 2021
In this article, a new saturated amorphous alloy core-based inrush current limiter (ICL) has been designed and built to limit the inrush current of a power transformer. A toroidal core with a middle limb is developed using the Metglas amorphous alloy and
M. M. Islam, K. Muttaqi, D. Sutanto
semanticscholar   +1 more source

Inrush Current of Superconducting Transformer

IEEE Transactions on Applied Superconductivity, 2013
Inrush current in superconducting transformers is a little-known phenomenon. Because of its high values and long time, it may lead to loss of superconductivity in transformer's windings. In the article, we present results of inrush current measurements in two superconducting transformers of the same power but different winding geometries.
G. Wojtasiewicz, G. Komarzyniec, T. Janowski, S. Kozak, J. Kozak, M. Majka, B. Kondratowicz-Kucewicz   +6 more
openaire   +1 more source

Study of Resistive Type SFCL for Limiting Inrush Current of LCC-HVDC Converter Transformer

IEEE transactions on applied superconductivity, 2021
Line commutated converter based high voltage direct current (LCC-HVDC) has played a more and more vital role in the power systems in recent years.
Yawei Guo, Zixuan Zheng, Qi Xie, Jinshuai Zhao   +3 more
semanticscholar   +1 more source

Calculation of the Magnetic Field and Inrush Current in a Three-phase Transformer

2020 Applying New Technology in Green Buildings (ATiGB), 2021
When a power transformer is connected to the grid, the inrush current increases substantially with a high value of harmonic components. At that time, the amount of flux in the core increases causing the magnetic circuit to saturate with a duration up to ...
Thanh Bao Doan, Chi Phi Do
semanticscholar   +1 more source

Prediction and Control of Transformer Inrush Currents

IEEE Transactions on Magnetics, 2015
In this paper, we propose a dynamic model of the electrical transformer suitable for the numerical prediction of the inrush currents due to the arbitrary initial excitation of a transformer after a switch-OFF. In particular, the proposed model can be helpful to control strategies to avoid a transient current overshoot, based on the prediction of the ...
CARDELLI, Ermanno, FABA, Antonio, TISSI, FRANCESCO   +2 more
openaire   +1 more source

Practical Scenarios to Evaluating Inrush Current Detection Function

2025 International Conference on Protection and Automation of Power Systems (IPAPS)
Distinguishing between fault and inrush current (IC) is a significant challenge for protective relays. Actually, the presence of a second harmonic in the IC waveform is one of their biggest distinctions.
Nader Jalali Marand, Ali Saeidifar, Hassan Sam Daliri, Seyf Ollah Afzalian Tabar, Mostafa Keramat, H. A. Abyaneh   +5 more
semanticscholar   +1 more source

Fiber Optic Current Transformers for Transformer Differential Protection during Inrush Current: a Field Study

2021 IEEE Madrid PowerTech, 2021
Saturation of electromagnetic current transformers (EMCTs) due to inrush current during re-energizing of a power transformer may lead to misoperation of differential protection.
N. Ivanov, P. Vorobev, J. Bialek, Ruslan Kanafeev, Maxim Yanin   +4 more
semanticscholar   +1 more source

Analysis of fault-induced inrush current of converter transformer in LCC HVDC system considering DC control and protection

, 2021
Converter transformers are vital devices in line-commutated-converter (LCC) high-voltage direct-current (HVDC) systems. This paper introduces a new inrush current induced by a valve-side asymmetric ground fault on a converter transformer.
T. Zheng, Xiaoxiao Liu, Xingchao Guo
semanticscholar   +1 more source