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Electromagnetic Forces in Power Transformers under short circuit conditions

Hachimenum Nyebuchi Amadi

Abstract


ABSTRACT

Power transformers are among the most expensive and key apparatuses in an electric power system. It is important thus, that they are properly protected and well-maintained. Transformers experience different stresses while in operation. The effect of electromagnetic force on transformer windings is worsened by electrical, mechanical, and thermal issues. Damage from the increase in electromagnetic force includes winding displacement, bending, and tearing. Therefore, it is essential to predict electromagnetic force when designing transformers. This paper investigated the causes and process of damage to transformer windings due to electromagnetic forces when these windings are short-circuited and recommended mitigation measures for the safer and more reliable operation of power transformers under such conditions.

 

Keywords: Electromagnetic force, power transformer, short circuit current, short circuit test, windings


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References


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