Analysing the Effects of Non-standard Overvoltages on the Internal Electrical Stresses along the Transformer Windings

Ebrahim Rahimpour¹, Alvaro Portillo², Ricardo Castro Lopes³

¹Technical University of Applied Sciences Würzburg-Schweinfurt, Germany; ²Transformer Consultant, Uruguay; ³EFACEC transformers, Portugal

An Accurate Detailed Model for Transformer Disc Windings Suitable for Medium Frequency Range

Jalal Piri¹, Hassan Reza Mirzaei¹, Mohammed Bilal Ghorbal¹, Ebrahim Rahimpour²

¹University of Zanjan, Electrical Engineering Department, Zanjan, Iran; ²Technical University of Applied Sciences Würzburg-Schweinfurt, Germany

AI Solutions for Transformer Tank Cover Optimization

Walter Lee, Rajeev Gupta Gupta, Tirdad Boroomand, Gary Pattyson

GE Vernova, United Kingdom

Thermal Network Modeling of Transformer Windings for Accurate Hotspot Prediction

Ali Al Abadi¹, Wei Wu², Irene Woyna¹

¹HITACHI Energy, Germany; ²HITACHI Energy, USA

Analytical Modeling of Oil Circulation and Nanoparticle Impact on Transformer Temperature Rise

Goran Bulatović¹, Peter Bokes¹, Juraj Kurimský³, Katarína Paulovičová², Michal Rajňák^2,3

¹Slovak University of Technology, Slovak Republic; ²Institute of Experimental Physics SAS, Watsonova 47, Košice, 04001, Slovakia; ³Technical University of Košice, Faculty of Electrical Engineering and Informatics, Letná 9, 042 00 Košice, Slovakia

DC bias currents in HVDC transformers

Robert Sitar¹, Longhu Chen¹, Marcus Rydja²

¹Hitachi Energy, Ludvika, Sweden; ²KTH Royal Institute of Technology, Stockholm, Sweden

GEOMAGNETICALLY INDUCED CURRENTS AND INFLUENCE ON POWER TRANSFORMER SATURATION

Antonio Gloc¹, Bruno Jurišić², Božidar Filipović-Grčić³

¹Končar – Distribution and Special Transformers Inc., Croatia; ²Končar – Electrical Engineering Institute Inc., Croatia; ³University of Zagreb Faculty of Electrical Engineering and Computing, Croatia

Advanced Scalable WebApp Approach for Automated Simulation of Transformer Components Using Python

Harikrushna Dodiya¹, Irene Woyna², Luigi De Mercato³

¹Senior R&D Engineer GLOMUS, Hitachi Energy, Maneja, India; ²R&D Principal Engineer Simulations GLOMUS, Hitachi Energy, Bad Honnef, Germany; ³Global Technology Lead – GLOMUS, Hitachi Energy, Molinazzo di Monteggio, Switzerland

Numerical Modeling and Direct Solver Development for Calculation of Power Transformer Core Clamping System Assembly

Davor Ruganec, Pavao Barišić

Končar Power Transformers Ltd., Croatia

Adaptive Cross Approximation for Efficient Modeling of Frequency-Dependent Resistance in Multiple-Conductor Systems

Bojan Trkulja¹, Tomislav Župan², Žarko Janić², Ana Drandic¹

¹University of Zagreb Faculty of Electrical Engineering and Computing, Croatia; ²Siemens Energy, Slavonska avenija 1A, 10000 Zagreb Croatia

Circulating Currents in Transformer Clamping System

Stipe Mikulić¹, Boris Okorn¹, Damir Žarko²

¹KONČAR - Distribution and Special Transformers Inc., Zagreb, Croatia; ²University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia

The Influence of Hysteresis Modeling on the Calculation of Magnetic Fields

Stjepan Frljic, Ana Drandic, Bojan Trkulja

University of Zagreb Faculty of Electrical Engineering and Computing, Croatia

Computation of the Turn-by-Turn Inductance Matrix of Transformer Windings by Using Cylindrical Multipole Expansion

Filip Vučić¹, Žarko Janić², Bojan Trkulja¹

¹Faculty of Electrical Engineering and Computing, University of Zagreb, Croatia; ²Siemens Energy, Slavonska avenija 1A, 10000 Zagreb, Croatia

The Abilities of TDSF and FDSF in Analyzing Voltage Distribution in Different Types of Disc Windings of Power Transformers

Martin Meuser¹, Ebrahim Rahimpour¹, Morteza Eslamian²

¹Technical University of Applied Sciences Würzburg-Schweinfurt, Germany; ²Hitachi Energy, Bad Honnef, Germany

Numerical and Experimental Analysis of Random Fatigue of Welded Connections Based on the Dirlik Method

Samuele Ossola¹, Sauro Vannicola¹, Tomasz Nowak², Mariusz Osika², Luigi De Mercato¹

¹Hitachi Energy LTD, Switzerland; ²Hitachi Energy Research, Poland

Challenges regarding Factory Acceptance Test of large unit of Variable Shunt Reactor

Branko Perunicic, Marko Markovic, Goran Raletic, Nebojsa Vucinic

Joint stock company “Elektromreza Srbije”, Serbia

The Impact of New Liquid Dielectric in Power Transformer on the Location and Detection of Partial Discharge Using UHF Sensors

Djordje Dukanac

Joint Stock Company "Elektromreza Srbije" Belgrade, Serbia

Assessment of transformer insulation by decision trees using a combinational weighting model

Manoj Teruvai, Shrikrishna V. Kulkarni

Department of Electrical Engineering, Indian Institute of Technology Bombay

Boundary Element and Optimisation-Based Methodology for Transformer Insulation Design

Ana Drandić, Bojan Trkulja, Stjepan Frljić

University of Zagreb Faculty of electrical engineering and computing, Croatia