Methods for Determining the Scattering Reactance of Transformer Windings

Abstract: Existing methods do not allow measuring the scattering reactances for each winding of a transformer separately. Therefore, for simplicity, they are often considered to be equal to each other. In fact, as applied to a case under consideration, they are not substantially equal. The calculation of the flux linkage of the external winding shows that its dissipation reactance is greater than the total resistance to scattering of both windings, whence it follows that the scattering reactance of the inner winding has a capacitive character. The purpose of the study is to substantiate the possibility of experimental determination of the scattering reactances for each winding of the transformer separately. The scattering reactance of each transformer winding can be determined separately by at least three experimental methods that yield satisfactory agreement of results. The presented experimental methods are not related with the nature of reactivity of scattering resistances. They are universal, since they can be used in all types of windings. The obtained results are recommended for use in the design and investigation of transformers. © 2021, Allerton Press, Inc.