Design of transformers for very fast transient overvoltages

Álvaro Portillo

Ing. Álvaro Portillo - Transformer Consultant, Uruguay

Empirical Representation of Transformer Branch Impedance Frequency Dependency

Bjørn Gustavsen¹, Luiz Oliveira², Alvaro Portillo³, Federico Portillo³

¹SINTEF Energy Research, Norway; ²Hitachi Energy, Brazil; ³Transformer Consultant, Uruguay

Interaction of Power Transformers and 145 kV GIS Disconnectors: Experimental Study on the Propagation of Very Fast Transient Overvoltages

Michael Bauer¹, Tobias Wendlinger², Thomas Manthe¹, Jan Weisker³, Mark Reuter³

¹Siemens Energy, Power Transformers Nuremberg, Germany; ²Siemens Energy, Power Transformers Linz, Austria; ³Siemens Energy, Switchgear Berlin, Germany

Optimization of the Electrical Insulation Between Grounded Rod and Winding

Filip Krpan¹, Karlo Petrović¹, Vjenceslav Kuprešanin¹, Pavao Križić¹, Antonija Marčina Brižić²

¹Končar - Electrical Engineering Institute Ltd., Croatia; ²Končar Power Transformers Ltd., Croatia

An Investigation on the effect of frequency dependent inductance calculation on high frequency modeling of transformer winding

Morteza Eslamian¹, Ebrahim Rahimpour², Kabir Sethi¹

¹Hitachi Energy Germany AG, Germany; ²Technical University of Applied Sciences Würzburg-Schweinfurt (THWS), Germany

Electromagnetic Modelling of a Phase-Shifting Transformer Based on DC Hysteresis Measurements

Alexander Fröhlich¹, Dennis Albert², Tomasz Bednarczyk², Sergey Zirka³, Gerald Leber⁴, Herwig Renner¹

¹Graz University of Technology, Institute of Electrical Power Systems, Graz, Austria; ²OMICRON electronics, Klaus, Austria; ³Dnipro National University, Dnipro, Ukraine; ⁴Siemens Energy Austria, Weiz, Austria

Thermo-Hydraulic Network Models: Accuracy and Performance under Operational Scenarios

Johannes Raith¹, Patrick Picher²

¹Siemens Energy, Austria; ²Hydro-Québec, Canada

Numerical Analysis of Clamping Element Pressure on Power Transformer Core Sheets

Dalibor Leljak, Pavao Barišić

Končar Power Transformers Ltd., Croatia

Numerical Vibroacoustic Analysis of a Large Transformer Tank Including Structural and Noise Optimization

Max GILLET¹, Bruno BOSNJAK¹, Hermann LANDES², Neeraj KEWAT¹

¹GE VERNOVA, GRID SOLUTIONS; ²INUTECH GMBH