Research on the Heat Accumulation Effect of Transformer Short Circuit

During each short-circuit process of the transformer, certain performance parameters will undergo irreversible damage, which will accumulate and gradually expand as the number of short circuits increases. The cumulative effect of transformers can be divided into force accumulation and thermal accumulation. This article mainly analyzes the thermal accumulation effect in sudden short circuits of transformers, establishes a finite element model of transformers, and analyzes the temperature rise of windings during sudden short circuits of transformers. And through experiments, the mechanical properties of insulating cardboard under different degrees of heat accumulation were studied. The research conclusion provides guidance for exploring transformer aging and determining the operating status of transformers after short circuits.