Additional eddy current losses in transformer working at static VAr compensation station

Issue title: Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering

Guest editors: P. Di Barba, Roberto Galdi, M.E. Mognaschi and S. Wiak

Article type: Research Article

Authors: Witczak, Pawel^a; | Osinski, Piotr^b

Affiliations: [a] Lodz University of Technology, Lodz, Poland | [b] Hitachi Energy, Lodz, Poland

Correspondence: [*] Corresponding author: Pawel Witczak, Institute of Mechatronics and Information Systems, Lodz University of Technology, Stefanowskiego 18, 90-537 Lodz, Poland. Tel.: +48 42 631 2580; E-mail: [email protected]

Abstract: The article discusses the impact of reactive power load on additional power losses in a high-power transformer operating at a VAr static compensation station. The presence of an almost pure capacitive load on the secondary side together with the thyristor switches is the cause of high-frequency components in the phase currents. The additional effect of electrical resonance between the transformer inductance and the load capacitance is also taken into account. The analysis is achieved using a three-dimensional finite element approach.

Keywords: Power transformer, capacitance load, eddy currents, power losses, finite element method

DOI: 10.3233/JAE-230202

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 76, no. 1-2, pp. 35-46, 2024