Recent Trends in Electrical Machines and Drives ISSN: 3139-2067 (Online)

Abstract

The vibrations and deformation of a test transformer core are measured using an experimental approach in this paper. Because the grid voltage contains some higher harmonics, the occurrence of a third harmonic is investigated in addition to a simply sinusoidal core magnetisation. The surface scan of the leg and the vibrations of the transformer core for points reveal higher deformation in the corners of the leg than in the centre. In the corners of the leg, the impact of the higher harmonic of the magnetisation on the core deformation is likewise more substantial. A sinusoidal magnetisation with a higher harmonic produces a more wavy and variable core deformation shape than a simply sinusoidal magnetization.

Keywords: Vibrations, Electrical Devices, Electricity Grid, Transformer Cores, Deformation Shape