Design of transformers for very fast transient overvoltages

Álvaro Portillo

Empirical Representation of Transformer Branch Impedance Frequency Dependency

Bjørn Gustavsen, Luiz Oliveira, Alvaro Portillo, Federico Portillo

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

Michael Bauer, Tobias Wendlinger, Thomas Manthe, Jan Weisker, Mark Reuter

Optimization of the Electrical Insulation Between Grounded Rod and Winding

Filip Krpan, Karlo Petrović, Vjenceslav Kuprešanin, Pavao Križić, Antonija Marčina Brižić

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

Morteza Eslamian, Ebrahim Rahimpour, Kabir Sethi

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

Alexander Fröhlich, Dennis Albert, Tomasz Bednarczyk, Sergey Zirka, Gerald Leber, Herwig Renner

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

Johannes Raith, Patrick Picher

Numerical Analysis of Clamping Element Pressure on Power Transformer Core Sheets

Dalibor Leljak, Pavao Barišić

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

Max GILLET, Bruno BOSNJAK, Hermann LANDES, Neeraj KEWAT

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

Ebrahim Rahimpour, Alvaro Portillo, Ricardo Castro Lopes

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

Jalal Piri, Hassan Reza Mirzaei, Mohammed Bilal Ghorbal, Ebrahim Rahimpour

AI Solutions for Transformer Tank Cover Optimization

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

Thermal Network Modeling of Transformer Windings for Accurate Hotspot Prediction

Ali Al Abadi, Wei Wu, Irene Woyna

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

Goran Bulatović, Peter Bokes, Juraj Kurimský, Katarína Paulovičová, Michal Rajňák

DC bias currents in HVDC transformers

Robert Sitar, Longhu Chen, Marcus Rydja

GEOMAGNETICALLY INDUCED CURRENTS AND INFLUENCE ON POWER TRANSFORMER SATURATION

Antonio Gloc, Bruno Jurišić, Božidar Filipović-Grčić

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

Harikrushna Dodiya, Irene Woyna, Luigi De Mercato

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

Davor Ruganec, Pavao Barišić

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

Bojan Trkulja, Tomislav Župan, Žarko Janić, Ana Drandic

Circulating Currents in Transformer Clamping System

Stipe Mikulić, Boris Okorn, Damir Žarko

The Influence of Hysteresis Modeling on the Calculation of Magnetic Fields

Stjepan Frljic, Ana Drandic, Bojan Trkulja

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

Filip Vučić, Žarko Janić, Bojan Trkulja

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

Martin Meuser, Ebrahim Rahimpour, Morteza Eslamian

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

Samuele Ossola, Sauro Vannicola, Tomasz Nowak, Mariusz Osika, Luigi De Mercato

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

Branko Perunicic, Marko Markovic, Goran Raletic, Nebojsa Vucinic

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

Djordje Dukanac

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

Manoj Teruvai, Shrikrishna V. Kulkarni

Boundary Element and Optimisation-Based Methodology for Transformer Insulation Design

Ana Drandić, Bojan Trkulja, Stjepan Frljić

Thermal Aspects of Insulating Liquids for Transformers: Overview of the NewLifT Project

Camilla Espedal, Håvard Bærug, Henrik Enoksen, Dag Linhjell, Lars E. Lundgaard

Use of re-refined oils in new transformers – pioneering project in Spain

Miguel Martinez, João Guimarães, Vadim Radul, Inna Gerasimova, Maria Reigadas, Myriam Picado, Hugo Campelo

Forecasting dissolved gas analysis in power transformers using machine learning approaches

Vedran Đurina, Marin Schönberger, Vilko Cindrić

Paper Bulging in Conductors for Power Transformer application

Lorenzo Cantini, Giacomo Palermo, Paolo Pavanello, Gianluca Bustreo

Thermal Fault Identification in Transformer Bushings Using Online Monitoring and Offline Testing

Stefano Stagni, Nathan Jacob, Dimytro Golovan

Reference Temperature Challenges in Transformers with Alternative Insulation and Cooling Systems

Mahdi Rahmbeksch, Jean-Claude Duart, Radoslaw Szewczyk

Use of machine learning to calculate the compressed height of power transformers windings

Leonardo Štrac, Carolina Toscano de Jesus, Diogo Fernandes Ribeiro, Davor Fabac

Closed-Form Analytical Inductive Transformer Model for Electromagnetic Transient Response During Line Discharge

Andrea Grđan, Igor Žiger, Zlatko Hanić

Repeated Flashover Test: Influencing Parameter Analysis

Igor Ziger, Marijana Nenadic, Andrea Grđan, Kresimir Koprivec, Tomislav Zupan

Considerations on transformer life determined by deterioration of insulating structure materials

Masanobu Yoshida, Hiroko Isaji

Voltage Transformer Accuracy Performance Calculation Methods

Igor Ziger, Marijana Nenadic, Nikola Budimir, Danijel Brezak

Internal Fault Testing at the Voltage Part of a Combined Power Voltage Transformer

Marijana Nenadić, Igor Žiger, Ivan Crnković, Danijel Brezak

Exploring Intermediate Results of Dynamic Thermal-Hydraulic Network Model Influencing Characteristic Temperatures inside Liquid Immersed Transformers

Zoran Radakovic, Marko Novkovic, Álvaro Portillo, Alexandre Pacheco Gomes, Santhiago Guedes Montenegro

Seismic Stability of the Technical System Cast Resin Transformer

Stanislav Kroták, Denis Kress, Michal Svoboda, Jan Hlaváč

Smarter Transformers, Stronger Grid: POWERGRID’s Digital Condition Monitoring Journey

Gunjan Agrawal, Naveen Srivastava, Deonath Jha, Dr. Devaprasad Paul

Enhancement of Tan-delta Values of Resin Impregnated Paper (RIP) Transformer Bushings by Various Techniques – CASE STUDY

NAVEEN KUMAR, SIVA BEHARA

Arresting of oil leakage in different locations of Transformers/Reactor using thrifty techniques - Case study

SIVA BEHARA, NAVEEN KUMAR

Condition Assessment of Power Transformers based on UHF PD Measurement

Stefan Tenbohlen, Martin Siegel

Full Scale Internal Arcing Test in 60MVA Power Transformer: Test Results Analysis and Simulation

Ashwin Padmanaban, Marwane Elkarii, Didier Hamoir

Experimental Evaluation of Magnetically Induced Losses Based on Temperature Measurements

Zvonimir Jurković, Bojan Trkulja, Karlo Petrović, Bruno Jurišić, Mario Jurković

FORMATION AND REMOVAL OF SILVER SULPHIDE ON OLTC CONTACTS: FIELD INVESTIGATIONS, PRACTICAL APPROACHES AND MAINTENANCE PERSPECTIVE

Adam Suleiman, Dejan Susa, Chandima Ekanayake

Sprayed Metal for Effecting Leaking Transformer Repairs (SMELTeR)

Muhammad Shaban, Gordon Wilson, Ruth Hooton, Allan Lathan, Kat Lennox

Unusual x-wax formation in distribution transformer – Case study

Dijana Vrsaljko, Ivanka Radić, Vedran Đurina, Ivan Krivačić, Veronika Haramija

Nonlinear Aging Behavior of Power Transformers under Increasing Load

Silas Selzer, Niklas Bäcker, Markus Zdrallek, Korbinian Maurer, Karlheinz Lindl

Predicting Transformer Resonance and Failure Risks via Natural Frequency Analysis

Irene Woyna, Ali Al-Abadi, Digpalsinh Parmar

New Approach for differentiated Health Index for Substation Assets

Philipp Masmeier, Dr. Johannes Kreling, Dr. Andreas Kurz

Smart Bushing Surveillance for a Safer Power Grid

Iva Radecic, Bruno Jurisic, Ivana Ivanovic, Vedran Jerbic, Marijan Perkovic, Dalibor Filipovic-Grcic, Marin Schönberger

Real-Time Monitoring of Station Service Voltage Transformer (SSVT)

Iva Radecic, Vedran Jerbic, Ivana Ivanovic, Bruno Jurisic, Marijana Nenadic, Igor Ziger

Challenges in Temperature Rise Testing of Station Service Voltage Transformers with Medium-Voltage Secondary Windings

Josip Ivankic, Igor Ziger, Danijel Brezak

Identification of Electrical Faults in a Transformer Winding using Unsupervised Dimensionality Reduction and Classification Algorithms

Mohammed Bilal Ghorbal, Hassan Reza Mirzaei, Ebrahim Rahimpour

Non-standard, high frequency power system transients

Ebrahim Rahimpour, Alvaro Portillo, Bruno Jurisic

Dynamic Thermal Rating of Power Transformers – Concepts, Standards, and Applications

Ildar Daminov, Tim Gradnik, Tor Laneryd

Artificial Intelligence and Classical Methods in DGA Interpretation - Use Case on a Real Transformer Defect

Alexander Pirker, Fredi Belavić

Cold Start Approval of Natural Ester Liquid Filled Power Transformer

AHMED GAMIL, Ali Al-Abadi

BREAKDOWN VOLTAGE TESTING AS A MULTI-PARAMETER DIAGNOSTIC PLATFORM FOR TRANSFORMER RISK ASSESSMENT

Marius Grisaru, Vitaly Gurin

Additives and Oxidation in Ester-Based Insulating Liquids – Requirements and Analysis

Griffin Burk, Edward Casserly, Bruce Pahlavanpour

Moisture Associated Dielectric Characteristics of Synthetic Ester-Filled Transformers Under Variable Load Conditions

Hemanshul Garg, Ali Al-Abadi, Irene Woyna, Digpalsinh Parmar

Direct Temperature Measurement Techniques for Heat Run Test of Dry-Type Transformers

Chunping Wang, Cheng Jin, Ali Al-Abadi

Extracting Key Thermal Parameters Beyond Top Liquid and Average Winding Temperature Rise from Standard Heat Run Test

Ali Al Abadi, Wei Wu

Resilience through Repair: Enhancing Grid Reliability via On-Site Restoration of EHV Transformers and Reactors

SUMIT SUMAN HARICHANDAN RAY, GUNJAN AGRAWAL, RAJIL SRIVASTAVA, NAVEEN SRIVASTAVA

Influence of background noise on noise measurement accuracy of reactor energized by test transformer

Janko Novosel, Matej Dorešić, Igor Telalović, Davor Švarc, Hrvoje Kordić

Analysis of temperature measurement systems of a power transformer in the transmission grid

Manuel Hillberger, Fredi Belavić, Gerald Steinmaurer

Online centralized supervision of distributing transformers

Wiesław Gil, Marek Andrzejewski, Mariusz Groński

Experience with Remote Service Solutions for Transformer Asset Management

Robert Niedermeier, Simon Ostroznik, Michael Lohr

Monitoring Principles of OLTCs in Power Transformers

Anatoli Saveliev, Anna Schröder, Andreas Kurz

Transformers Bushings: Capacitance Differences Between Factory Acceptance Tests and Onsite Tests

Jean Sanchez, Safire Santos Da Silva

A Techno Economic Model for Evaluating Low Loss Power Transformers

Samir Keitoue, Tomislav Pavičić