Study on Short-Circuit Damage of Power Transformer Windings Considering Material Properties

Power transformer is an important equipment of power system, its short circuit will produce huge short circuit impact force, which will harm the safety and stability of power system. When the transformer is subjected to short circuit, the winding will produce plastic deformation, which will change its winding structure and affect its structural stability, so it is important to study the transformer short circuit damage. Based on the principle of short circuit, this paper calculates the distribution of magnetic leakage and electromotive force in transformer short circuit. In order to consider the material properties, the mechanical properties of copper wire and pad in winding are studied to study the damage of short circuit impact on winding. Finally, the cumulative damage effect of multiple short-circuit shocks on windings is verified by the actual transformer multiple short-circuit experiments.