Results 211 to 220 of about 89,571 (244)
Some of the next articles are maybe not open access.
Inrush Current Modeling in a Single-Phase Transformer
IEEE Transactions on Magnetics, 2010This paper introduces a proper model for ferromagnetic core which includes hysteresis, saturation, eddy current losses, and anomalous losses. This model can generate symmetrical and asymmetrical loops with high accuracy. An artificial neural network is used to present the major dc hysteresis loop and initial magnetization curve based on a set of ...
Jawad Faiz, Saeed Saffari
openaire +1 more source
Notes on parameter estimation for single-phase transformer
IEEE Transactions on Industry Applications, 2020This article investigates the inaccuracies of identifying parameters for a single-phase transformer. In addition, in this article, two new transformer parameter estimation algorithms based on recently developed optimization techniques, as well as an objective function, are proposed for the transformer parameter estimation to improve the estimation ...
Martin Calasan +4 more
openaire +1 more source
Ferroresonance modes determination of single-phase toroidal transformers
2017 15th International Conference on Electrical Machines, Drives and Power Systems (ELMA), 2017The actual high incidence of the low-loss power transformers in the modern electric and electronic installations, increase the risk of the ferroresonance occurrence. This could be commonly triggered by a capacitive switching of the transformers. Consequently, significant overvoltages and overcurents are experienced by all the installation components ...
Emil Cazacu +2 more
openaire +1 more source
A Soft-Switching Single-Phase Transformer-Isolated Inverter
2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS), 2018This paper proposed a soft-switching single-phase transformer-isolation inverter with a transformer-isolated soft-switching dc link. The transformer-isolated soft-switching dc link provides electrical isolation function and soft-switching function on main power switches in inverter.
Chien-Ming Wang +3 more
openaire +1 more source
Harmonic analysis of ferroresonance in single-phase transformers
2012 IEEE 15th International Conference on Harmonics and Quality of Power, 2012Ferroresonance is a power quality problem that is characterized by distorted overvoltage and current waveforms. This paper reviews the ferroresonance problem associated with a circuit involving an unloaded transformer that is connected to a source through a capacitor, and solution methodologies. A common simplified method based on fundamental frequency
Xusheng Chen +2 more
openaire +1 more source
Initial transformer sizing for single-phase residential load
IEEE Transactions on Power Delivery, 1992The authors describe a method for determining the correct economic size of distribution transformers using end-use appliance load profiles and the ANSI/IEEE Standard C57.91-1981 thermal model. The method was developed to select the distribution transformer size required to serve single-phase residential loads.
K.C. Schneider, R.F. Hoad
openaire +1 more source
3-phase transformer used on single phase
14th International Conference Mechatronika, 2011This paper deals with the possibility of using three-phase transformer for single-phase power source and single-phase load. The first part of this work is focused on possible ways of utilizing three-phase transformer on single-phase power source and different ways how to load the transformer. Theoretical assumptions were verified by measurements.
openaire +1 more source
Electronic transformer design using Single-phase Matrix Converter
2009 IEEE Symposium on Industrial Electronics & Applications, 2009This paper investigates single-phase electronic transformer design using two stages of Single-Phase Matrix Converter (SPMC) coupled through a high frequency transformer each at the primary and secondary winding in an effort to reduce the size in the future applications of power transformer. Loads are presented in the form of passive device.
H.M. Hanafi, M.K. Hamzah, N.R. Hamzah
openaire +1 more source
Inception of Jump resonance in Single phase transformer
2021 4th Biennial International Conference on Nascent Technologies in Engineering (ICNTE), 2021The saturation of the transformer leads to abnormality as the device enters the nonlinear mode of operation. One such condition is ferroresonance in the transformer which has resulted in (2 - 4) pu overvoltage and overcurrent. The saturated transformer can initiate any one of the four modes of ferroresonance depending on initial conditions and circuit ...
openaire +1 more source
Tutorial on Protection of Three Single-Phase Transformers
2019 72nd Conference for Protective Relay Engineers (CPRE), 2019At the design stage of a new power substation, one of the decisions to be made is whether to select a single three-phase power transformer or a bank of three single-phase transformers. At Churchill Falls Terminal Station 2, of the Lower Churchill Project, a bank of three single-phase 3×280 MVA 735 kV power transformers was selected because of the ...
Stephan D. Picard +2 more
openaire +1 more source