Study of the Three Phase Transformers under DC Bias and Suppression Measure

DOI

10.2991/lemcs-15.2015.119How to use a DOI?

Keywords

Three phase transformers; DC bias; Hysteretic effect; Eddy-loss; Saturation characteristic

Abstract

A novel transmission-line model (TLM) of the three phase transformers under direct current (DC) bias is built. In the model, the differential terms in the transformers circuit model are discretized. The saturation characteristic and the hysteresis effect of the core material are described on the basis of the Jiles-Atherton ferromagnetic hysteresis theory, and the eddy-current losses resulting from the flux paths through legs are replaced by an equivalent resistance. Furthermore, the copper losses and the leakage inductance of the primary and the secondary windings are also included. The nonlinear differential-algebraic equations can be obtained. At last, the Newton-Raphson technique is chosen to calculate the equations. The calculation results confirm the correctness and validity of the proposed the TLM for the three phase transformers under DC bias. At last, suppression measures of the DC bias are presented. The peak values of the exciting currents become smaller, and their distortion is partially reduced after taking the suppression measures.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xia Dong
PY  - 2015/07
DA  - 2015/07
TI  - Study of the Three Phase Transformers under DC Bias and Suppression Measure
BT  - Proceedings of the International Conference on Logistics, Engineering, Management and Computer Science
PB  - Atlantis Press
SP  - 620
EP  - 623
SN  - 1951-6851
UR  - https://doi.org/10.2991/lemcs-15.2015.119
DO  - 10.2991/lemcs-15.2015.119
ID  - Dong2015/07
ER  -