Statistical analysis amplitude-frequency characteristics of power transformer windings in operation

Abstract

In the work is given a statistical analysis of power transformer’s testing results obtained by using frequency response analysis method. The research has been done from the amplitude-frequency characteristics of low voltage windings for twelve autotransformers type of “ATDCTN”. The localization method of most informative resonance in amplitude-frequency characteristics spectrum for detecting mechanics faults of winding is proposed.

Keywords

• autotransformers
• amplitude-frequency characteristics
• frequency response analysis method
• resonance
• fault winding