Diagnóstico de deformaciones en devanados de transformadores de potencia mediante la evaluación de la reactancia de dispersión

Abstract

This document presents a convenient methodology to determining the value of the reactance of the transformer based on the energy stored inside this electrical equipment. In order to reach this purpose the magnetic fields generated by the flow of current in its windings is analyzed, and proposing a mathematical model that fits directly in the solution of Maxwell's equation for quasi-static fields. The methodology is validated when applied to a power transformer whose leakage reactance is known. Additionally an analysis is performed for different scenarios treated with the geometry of the transformer windings and shows that the value of the reactance varies when the internal geometry of the transformer suffers some mechanical failure, specifically its windings.