Online transformer winding deformation monitoring method based on circuit impedance method

The invention discloses an online transformer winding deformation monitoring method based on a circuit impedance method and relates to a method used for monitoring transformer winding deformation conditions online. The method comprises steps that a circuit impedance value of a primary winding and a circuit impedance value of a secondary winding of a transformer in online operation are calculated by a micro processor according to an acquired first voltage, an acquired first current, an acquired second voltage and an acquired second current, and a mathematics model for calculating circuit impedance; the circuit impedance value of the primary winding acquired through calculation is compared by a worker with a circuit impedance value of a standard primary winding, the circuit impedance value of the secondary winding acquired through calculation is compared by the worker with a circuit impedance value of a standard secondary winding, and the transformer winding deformation conditions can be determined online in re