Diagnosis and Preventive Measures of Transformer Winding Deformation

In order to improve the diagnosis level of transformer winding deformation,and reduce or avoid the happening of transformer winding deformation accident,field test data of a certain transformer in different period are analyzed by using low voltage short circuit impedance method and frequency response method,and rules of transformer winding deformation are discussed. By combining above two methods,whether the deformation of transformer winding has happened or not can be diagnosed,and further more the winding of deformation and the degree of the deformation can be obtained. Preventive measures for the transformer winding deformation from aspects of test,protection and maintenance are proposed.