Short-circuit Impedance Calculation of 25 MVA Autotransformer with Tertiary Winding using FEM

Authors

Keywords:

autotransformer, finite element method, impedance, short-circuit, tertiary winding

Abstract

In this article, the percentage of short-circuit impedance is calculated using the finite element method for a single-phase power autotransformer with tertiary winding. The autotransformer specifications are: 25 MVA, 230 kV, 60 Hz, three-legged core type. A detailed 3D model where mixed formulations in terms of scalar and vector potential and circuit coupling is used. This type of study is essential to design the autotransformer and guarantee the impedance value, and so the safety and operability of electrical power systems. To calculate the percentage of short-circuit impedance the voltage relationship between the short-circuit voltage and the nominal voltage is used. In addition, the magnetic energy storage technique is presented as another alternative to calculate this parameter. The results are validated with the data from the laboratory tests obtaining differences of less than 5%.

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Author Biographies

Victor Manuel Jimenez-Mondragon, Universidad Autonoma Metropolitana

V. M. Jimenez-Mondragon was born in Atizapan, Estado de Mexico, Mexico, in 1986. He received the B.Sc. degree in electrical engineering from Universidad Autonoma Metropolitana (UAM), Mexico City, in 2009 and the M. Sc. and Ph. D. degrees from Universidad Nacional Autonoma de Mexico, Mexico City in 2013 and 2017, respectively. He is a full-time professor in the Departamento de Energia, UAM-Azcapotzalco. His main interests are related to computational electromagnetism and analysis of electric machinery.

 

Victor Julián Fernandez Carrazana, Universidad Autónoma Metropolitana-Azcapotzalco

He received the B.Sc. degree in electrical engineering from Central University “Marta Abreu” de las Villas, Cuba, in 2014. He worked at the industry for 6 years in the design and start-up of electric motors and control centers. He is currently studying a Master of Science in Electromagnetic Engineering at the Universidad Autonoma Metropolitana-Azcapotzalco, Mexico city

Juan Carlos Olivares Galvan, Universidad Autónoma Metropolitana-Azcapotzalco

He received a Ph.D. in electrical engineering at CINVESTAV, Guadalajara, Mexico in 2003. He was a Visiting Scholar at Virginia Tech, Blacksburg, U.S., in 2001. He was a Visiting Professor at the University of Alberta, Edmonton, Alberta, Canada during 2014. He was a transformer design engineer for eight years. He is currently a professor at the Universidad Autonoma Metropolitana.

Rodrigo Ocon Valdez, FES Aragón, Universidad Nacional Autónoma de México

R Ocón-Valdez (M’02-SM’18). He was received a M.Sc. degree on electrical power systems (2006), he is Ph.D. student in educational sciences at the College of Postgraduate Studies of Mexico. From 1995 to 2021, he worked at IEM Condumex as design engineering and development manager in the area of transformer design. He is Professor at FES Aragón UNAM, since 1996 on electrical engineering. He also works as a Technical Consultant in areas of design, analysis, diagnosis and manufacturing of transformers.

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Published

2023-03-02

How to Cite

Jimenez-Mondragon, V. M., Fernandez Carrazana, V. J., Olivares Galvan, J. C., & Ocon Valdez, R. (2023). Short-circuit Impedance Calculation of 25 MVA Autotransformer with Tertiary Winding using FEM. IEEE Latin America Transactions, 21(3), 498–504. Retrieved from https://latamt.ieeer9.org/index.php/transactions/article/view/7552

Issue

Vol. 21 No. 3 (2023): Ordinary Issue

Section

Electric Energy