Results 221 to 230 of about 10,677,552 (246)

Controlling Inrush Currents in Inductively Coupled Power Systems

International Journal of Emerging Electric Power Systems, 2005
In an Inductively Coupled Power Transfer (ICPT) system, a multiplicity of (moving) loads take power from an elongated conductive loop (track) excited by a current in the range of 15-125A by magnetic induction at a VLF frequency of between 5-50kHz.
J.T. Boys, C.I. Chen, G.A. Covic
openaire   +1 more source

Predictive Formulas to Improve Transformer Protection During Inrush Current Using the Proposed DC Equivalent Circuit

IEEE Transactions on Power Delivery, 2020
Switching-on a power transformer creates energizing inrush current (EIC) which in turn leads to sympathetic inrush current (SIC) in adjacent in-service transformers (ITs).
Arash Moradi, S. M. Madani
semanticscholar   +1 more source

Capacitive current switching of Vacuum Interrupters and inrush currents

2012 25th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV), 2012
Capacitive current switching has become increasingly necessary for power factor correction in distribution systems. However, Restrikes are potentially dangerous as they could cause overvoltage which can be harmful to the power system. The dielectric strength of the Vacuum Interrupter (VI) in a capacitive current switching is strongly determined by a ...
He Yang, Yingsan Geng, Zhiyuan Liu
openaire   +1 more source

The Inrush Current Eliminator of Transformer

2012
In the power industry, transformers are key components for electrical energy transfer. However, the transformer always is affected by inrush current problems of itself. The inrush currents will cause power system network with voltage dip, harmonic, over-voltage, sympathetic current and mal-trip of protective relay and so on.
Li-Cheng Wu, Chih-Wen Liu
openaire   +1 more source

Current transformer performance for inrush current in power transformers

Electric Power Systems Research, 1988
Abstract A mathematical model has been developed for a current transformer to predict the transient performance during switch-in of a power transformer with residual flux. Typical 50 - 100 - 200/1 and 300/1 current transformers have been simulated and the secondary current response has been computed for different values of the current transformer ...
B.T. Desai, H.O. Gupta, M.K. Vasantha
openaire   +1 more source

Research on Magnetizing Inrush Current and Fault Identification of Transformer Based on VMD-SVM

2020 IEEE International Conference on Information Technology,Big Data and Artificial Intelligence (ICIBA), 2020
Aiming at the problem of misoperation of transformer differential protection that is susceptible to inrush current in the past, this paper proposes an identification method of excitation inrush current based on variational mode decomposition-support ...
Jing Meng, Jingyi Du
semanticscholar   +1 more source

A simulation study of the influence of magnetizing inrush current and sympathetic inrush current of converter transformers

2016 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2016
Magnetizing inrush current will occur when the transformer is energized without load, which will cause that the already energized neighboring transformers generate sympathetic inrush current. The currents have influence on the operation of HVDC system if they occur in the converter transformers due to their characteristics.
null Rui Li, null Shuyong Song, null Zhenguo Ma, null Han Jiang, null Biyue Huang, null Haishun Sun, null Chenying He   +6 more
openaire   +1 more source

Inrush current modeling of three-limb core-type power transformers based on efficient analytical-numerical hybrid method

, 2020
This study proposes a time-domain analytical-numerical method in order to precisely assess the three-phase three-limb core-type transformer inrush current considering the nonlinear behavior of the iron core.
Z. Taghikhani, M. Taghikhani, G. Gharehpetian   +2 more
semanticscholar   +1 more source

A Non-Control Transformer Inrush Current Limiter

2006 IEEE International Conference on Industrial Technology, 2006
A new method is proposed for inrush current reduction of under load transformers. The proposed limiter consists of a control-less diode-bridge and a single coil that connects in series with each-phase of transformer. It is necessary using three similar circuits for three-phase transformers.
M. Abapour, M. Tarafdar haqh
openaire   +1 more source

Characteristic analysis of zero-mode inrush current of high-impedance transformer

, 2020
In recent years, zero-sequence overcurrent protection misoperated frequently when the high-impedance transformers are energized without load. This paper studies the characteristics of zero-mode inrush current of the high-impedance transformers, including
Wenbin Cao, Xianggen Yin, Zhe Zhang, Yuanlin Pan, Yuxue Wang, X. Yin   +5 more
semanticscholar   +1 more source