Improving the Reliability of Online Bushing Monitoring

Vedran Jerbic; Samir Keitoue; Jurica Puskaric; Ivan Tomic

doi:10.37798/2024731511

Authors

Vedran Jerbic Koncar Electrical Engineering Institute
Samir Keitoue Koncar Power Transformers Ltd
Jurica Puskaric HEP Proizvodnja d.o.o
Ivan Tomic HEP Proizvodnja d.o.o

DOI:

https://doi.org/10.37798/2024731511

Keywords:

Bushing Monitoring, Transformer Monitoring, Condition monitoring, insulation diagnostic, capacitance, dissipation factor, Online Monitoring, Transient overvoltage monitoring

Abstract

This paper discusses the common issue of bushing failures in power transformers and presents methods for preventing such failures through online monitoring. The paper presents a method based on the comparison of bushing leakage currents from different transformers connected to the same busbars to overcome problems with unreliable measurement results due to grid voltage imbalance or frequent transformer outages.