Development of transformers with natural ester and cellulose or aramid insulation

Ramazan Altay; İrem Hazar; Mahmut Aksoy; Hakan Aktay; Jean-Claude Duart; Radoslaw Szewczyk

doi:10.37798/2023723506

Authors

Ramazan Altay BEST, Balikesir Elektromekanik Sanayi Tesisleri A.S.
İrem Hazar BEST, Balikesir Elektromekanik Sanayi Tesisleri A.S.
Mahmut Aksoy BEST, Balikesir Elektromekanik Sanayi Tesisleri A.S.
Hakan Aktay Opti-Consult
Jean-Claude Duart DuPont Specialty Products Operations Sarl
Radoslaw Szewczyk DuPont Polska Sp. z o.o.

DOI:

https://doi.org/10.37798/2023723506

Keywords:

Natural ester liquid, electric field distribution, computational fluid dynamics, aramid insulation

Abstract

This study describes selected research studies performed for developing design rules for power transformers using
natural esters. The presented simulation results verified adequacy of design rules and allowed for adjustments needed for
implementing the new insulation system vs. the one based on mineral oil and cellulose-based solid insulation. They were also
used as a base for the next transformer design combining natural ester with aramid insulation.

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Author Biographies

Ramazan Altay, BEST, Balikesir Elektromekanik Sanayi Tesisleri A.S.

Ramazan Altay has been a researcher and R&D analysis
division manager at BEST Transformer since 2021.
He received a bachelor degree in machine engineering
from Balıkesir university in 2012, a Masters degree in
mechanical engineering from Balıkesir university in
2018, and has been enrolled at a doctorate program at the
University of Cantbria since 2019. He started his career
at BEST Transformer as a mechanical design engineer in
2014, becoming an R&D mechanical analysis engineer in 2017.

İrem Hazar, BEST, Balikesir Elektromekanik Sanayi Tesisleri A.S.

İrem Hazar has been a researcher and an R&D
electrical analysis engineer at BEST Transformer since
2021. She received a bachelor degree in electrical and
electronic engineering from the Celal Bayar University
in Manisa in 2016, obtaining a Masters degree at the
same university in 2020. Before her appointment at
BEST, she worked at İşbir Elektrik Sanayi as an R&D
engineer.

Mahmut Aksoy, BEST, Balikesir Elektromekanik Sanayi Tesisleri A.S.

Mahmut Aksoy has been the research and development
manager at BEST Transformer since 2022. He
graduated from the Istanbul Technical University in
2003 with a bachelor degree in Electrical Engineering.
In 2012 he obtained an MBA at Istanbul Bilgi
University. From 2008 to 2021, he was the director of
electrical design and, from 2021-2022, the director of
the development of design analysis in the company.
Priorto his appointment at BEST, he worked in companies such as Vestel
Beyaz Eşya A.Ş., Alarko-Carrier A.Ş. and Areva T&D.

Radoslaw Szewczyk, DuPont Polska Sp. z o.o.

Radoslaw Szewczyk received his Master’s degree in Electrical Engineering at Lodz University of Technology in 1998. He has experience in electrical design of liquid-immersed distribution and power transformers. He works for DuPont™ Nomex® Electrical Infrastructure business as a Technical Service & Development Expert. He supports transformer developments with application of Nomex® aramid insulation. He is a member of IEC, IEEE and CIGRE working groups.