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    E-lesson

    Design of power transformers – e-lesson #12: Regulation concepts

    Course: Master’s level

    Hosted by: Aleksandar Lojpur

    This is lesson number 12 in the Design of power transformers course and also the opening lesson on Master's level. You can save your seat here.

    This lesson will cover the fundamental principles of transformer voltage regulation. We will explore the different categories of voltage variation, including constant flux, variable flux, and combined voltage variation. The key concepts of tapping, tap changers, and their impact on transformer design will be discussed. Attendees will learn about the advantages and disadvantages of various winding connection methods, such as steps inside the winding, linear regulation, and reversing regulation. The lesson will also provide an overview of booster connections and phase shifting transformers. Understanding these regulation concepts is crucial for the master-level design of power transformers. By the end of this session, participants will have a solid grasp of the essential elements governing transformer voltage regulation.

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    Attend this session to learn about the following concepts:

    • Constant flux voltage variation
    • Variable flux voltage variation
    • Indirect regulation
    • Direct regulation
    • Off-circuit / on-load regulation
    • Linear, coarse-fine, reverting regulation, taps inside the winding

    About the author

    Alekasndar Lojpur picture - 300 x 300

    Aleksandar Lojpur

    Aleksandar Lojpur is a Master of Electrical Engineering, having obtained the degree at the Faculty of Electrical Engineering and Computing at the University of Zagreb, Croatia.

    In the period from 2014 to 2021 he performed the duty of Head of Electrical design at the Končar Power Transformers Ltd., a joint venture of Siemens Energy AG and Končar, while from 2019 to 2020 he was a lecturer at the Postgraduate Specialist Study in Transformers – Transformer Design at the University of Zagreb, Faculty of Electrical Engineering and Computing.

    His most notable projects include 200 MVA autotransformer with phase shift regulation for Croatia; 560 MVA, 550 kV single phase autotransformer for USA; 1,000 MVA, 420 kV autotransformer for Norway; 240 MVA, 275 kV ester-filled autotransformer for the UK; 400 MVA, 245 kV split winding network transformer, SC-tested for the Netherlands.

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