Winding deformation judgment method based on frequency response analysis (FRA)

The invention discloses a winding deformation judgment method based on frequency response analysis (FRA). The method comprises the steps that a method is established according to a transformer windingequivalent circuit model, the influence law of a winding physical form on winding RLC and other distribution parameters is analyzed, a winding system parameter identification technology is determined, influence factors of winding circuit parameters are summarized, the relation between winding system parameter changes and deformation factors is obtained, a sweep frequency impedance curve is used for judgment, and a short-circuit reactance method and a frequency response method are combined and can be called a "sweep frequency impedance method". The sweep frequency impedance method is a novel transformer winding deformation test method, well combines the characteristics of the two test methods, makes a big breakthrough in test principle and has the advantages that test equipment is simple and easy to carry, the sen