Power transformers are a key component of electrical networks, and they are both expensive
and difficult to upgrade in a live network. Many utilities monitor the condition of the …

Abstract Frequency Response Analysis (FRA) is an effective diagnostic technique for
detection of mechanical deformations inside a power transformer. The results of previous …

Monitoring of winding faults is of great significance for the assessment of the transformer
maintenance status. In this study, the time series analysis is combined with frequency …

The transformer is critical equipment in electrical power systems as it is continuously
exposed to various failures. Inter-turns fault in the transformer reduces the turns of the …

This study presents an intelligent fault classification method for identification of transformer
winding fault through transfer function (TF) analysis. For this analysis support vector …

The condition of the internal cellulosic paper and oil insulation are of concern for the
performance of power transformers. Over the years, a number of methods have been …

This study is an effort to evaluate the numerical indices for the assessment of frequency
response analysis (FRA) to provide a deeper understanding of their characteristics. First, the …

The sudden outage of a transformer due to a fault can cause irreparable damage to the
electricity industry. Hence, by conducting momentarily inspections of the transformer's …

Frequency-response analysis (FRA) is an efficient method to examine the mechanical
integrity of a power transformer. Different connection schemes can be implemented for …

This paper discusses the application of Nyquist plot and two statistical indicators to analyze
the frequency response of power transformers. Five cases are presented based on both …