Conference session

Vedran Jerbic, Koncar – Electrical Engineering Institute: Condition Monitoring of Power Transformer Insulation: HV Bushings, Partial Discharges and Transient Overvoltages

Končar group

This presentation is hosted by Vedran Jerbic.

Transformer insulation is known to deteriorate over time due to a range of stresses including electrical, thermal, mechanical, and environmental factors.

Transient overvoltages caused by lightning strikes and switching operations can result in electrical stress, while the presence of partial discharge (PD) activity is a reliable indicator of insulation degradation, particularly when its trend is increasing.

Power transformer failures are frequently attributed to bushing failures, which can cause severe damage and even result in fires. To prevent such failures, it is essential to monitor all of these parameters and diagnose problems at an early stage, enabling transformer users to plan maintenance activities promptly.

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About the author

Vedran Jerbic

Koncar – Electrical Engineering Institute

Vedran JerbiC was born on 11 September 1984 in Zagreb, Croatia. He received his Master of Science degree in Electrical Engineering from the Faculty of Engineering and Computing in Zagreb 2008 while working on the development of electronic devices for application in harsh environment for the oil and gas industry. He joined KONČAR -Electrical Engineering Institute in 2009 where his main area of work was designing sensors, embedded systems and signal processing algorithms used for monitoring of critical assets in power generation, distribution and transmission. His main field of expertise is electronic design and digital signal processing, particularly implemented in FPGA.

In 2010, he led the development of algorithms and data acquisition platform used for bushing monitoring. Since 2012 his focus has been development of partial discharge monitoring methods and devices, which resulted in KONČAR propriety partial discharge monitoring solution launched in 2020. From 2016 until 2018, he led development of new generation of transient overvoltage monitoring device which is integrated in KONČAR transformer monitoring solution. Currently, Vedran is working on new monitoring solutions and improvements of existing ones by using modern digital communication technologies.