Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

Alvaro Carreno, Marcelo Perez, Carlos Baier, Alex Huang, Sanjay Rajendran and Mariusz Malinowski
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Alvaro Carreno: Electronics Engineering Department, Universidad Tecnica Federico Santa Maria, Valparaiso 2390123, Chile
Marcelo Perez: Electronics Engineering Department, Universidad Tecnica Federico Santa Maria, Valparaiso 2390123, Chile
Carlos Baier: Department of Electrical Engineering, Universidad de Talca, Curico 3340000, Chile
Alex Huang: Semiconductor Power Electronics Center, The University of Texas, Austin, TX 78712, USA
Sanjay Rajendran: Semiconductor Power Electronics Center, The University of Texas, Austin, TX 78712, USA
Mariusz Malinowski: Institute of Control and Industrial Electronics, Warsaw University of Technology, 00-662 Warsaw, Poland

Energies, 2021, vol. 14, issue 5, 1-35

Abstract: Distribution systems are under constant stress due to their highly variable operating conditions, which jeopardize distribution transformers and lines, degrading the end-user service. Due to transformer regulation, variable loads can generate voltage profiles out of the acceptable bands recommended by grid codes, affecting the quality of service. At the same time, nonlinear loads, such as diode bridge rectifiers without power factor correction systems, generate nonlinear currents that affect the distribution transformer operation, reducing its lifetime. Variable loads can be commonly found at domiciliary levels due to the random operation of home appliances, but recently also due to electric vehicle charging stations, where the distribution transformer can cyclically vary between no-load, rated and overrated load. Thus, the distribution transformer can not safely operate under highly-dynamic and stressful conditions, requiring the support of alternative systems. Among the existing solutions, hybrid transformers, which are composed of a conventional transformer and a power converter, are an interesting alternative to cope with several power quality problems. This article is a review of the available literature about hybrid distribution transformers.

Keywords: distribution transformers; hybrid transformers; partial power converter; power electronics converter; power quality; transformer lifetime (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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