Power transformers are essential elements in electrical systems and the end of their useful
life is frequently conditioned by the state of the cellulosic insulation materials inside them …

In this article, a new testing method for the diagnosis of winding faults based on the resonant
frequency of the transformer is proposed. The system that consists of the high-voltage dc …

When an external short circuit occurs, the axial electromagnetic force increases dozens of
times. Under the effect of the axial short-circuit electromagnetic force, the transformer …

This review addresses the modeling approaches for heat transfer processes in oil-immersed
transformer. Electromagnetic, thermal, and hydrodynamic thermal fields are identified as the …

Autotransformer (AT) is the most core power supply equipment, and overvoltage and short
circuit (SC) fault may lead to winding deformation, which will have a negative impact on its …

In this study, a positive feedback loop between gap occurrence during vibration and residual
deformation of spacers is identified, based on which a transformer failure path under …

Vibration signal analysis is an efficient online transformer fault diagnosis method for
improving the stability and safety of power systems. Operation in harsh interference …

The inner winding of transformers may get buckled under the short-circuit condition. To
avoid the buckling of the inner winding, the critical stress at which buckling occurs should be …

Electromagnetic forces in power transformer windings are produced by interaction between
the leakage fluxes and current passing them. Since the leakage flux distribution along the …

Once the short circuit damage accident of a large capacity 500 kV transformer occurs
suddenly, it will seriously affect the safe operation of the power grid. The article expounds on …