Title :
Accounting for the Influence of the Tank Walls in the Zero-Sequence Topological Model of a Three-Phase, Three-Limb Transformer
Author :
Zirka, Sergey E. ; Moroz, Yuriy I. ; Arturi, Cesare M.
Author_Institution :
Dept. of Phys. & Technol., Dnepropetrovsk Nat. Univ., Dnepropetrovsk, Ukraine
Abstract :
A method is proposed to account for the influence of the tank walls in the topological transient model of a three-phase, three-limb core-type transformer. The influence of the transformer tank walls as a distributed-parameter hysteretic element is reproduced by solving a diffusion equation that describes the penetration of the plane electromagnetic wave into the depth of the wall. The reliability of the model is validated by comparing its zero-sequence impedances to those measured on a 25-MVA transformer, in the presence and absence of a tertiary stabilizing winding. An Electromagnetic Transients Program-Alternate Transients Program implementation of the model is outlined.
Keywords :
EMTP; distributed parameter systems; electromagnetic waves; power transformers; alternate transients program; diffusion equation; distributed parameter hysteretic element; electromagnetic transients program; plane electromagnetic wave; tank walls; three limb transformer; three phase transformer; topological transient model; zero sequence topological model; Integrated circuit modeling; Magnetic cores; Magnetic hysteresis; Mathematical model; Saturation magnetization; Steel; Windings; Excess core loss; hysteresis models; transformer transients;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2014.2307117
