Open AccessImpacts of ferroresonance and inrush current forces on transformer windings
Author(s) -
MikhakBeyranvand Morteza,
Rezaeealam Behrooz,
Faiz Jawad,
RezaeiZare Afshin
Publication year - 2019
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2018.5193
Subject(s) - electromagnetic coil , inrush current , ferroresonance in electricity networks , transformer , finite element method , delta wye transformer , magnetic core , electrical engineering , engineering , rotary variable differential transformer , mechanics , structural engineering , isolation transformer , current transformer , materials science , voltage , physics
Deformation of the windings is one of the main causes of the power transformers failure. Here, for the first time, the electromagnetic forces exerted on the windings are computed in ferroresonance condition and compared with that of the inrush current for a typical power transformer. In both cases, the magnetic core of the transformer saturates and the leakage flux around the windings increases, which leads to large forces on the windings carrying high currents. Therefore, precise modelling of the transformer core is required to calculate the forces inside the transformer. For this purpose, the Jiles–Atherton vector hysteresis model is employed in conjunction with finite element method (FEM) to simulate the laminated grain‐oriented steel core, and then the radial and axial forces inflicted on the windings are estimated.