Investigation of condition monitoring of transformer winding based on detection simulated transient overvoltage response

In order to keep the original connection of transformer, a novel method and apparatus is proposed for condition monitoring of transformer winding based on the detection of transient overvoltage signals. Firstly, a lumped parameter model of transformer winding is established to verify the equivalence in frequency response analysis between the overvoltage and sweep frequency voltage. Then experimental study is conducted on different types of winding faults, to conform the capability to identify the winding fault types. And the investigation of condition monitoring of 110 kV transformer is conducted. The over-voltage frequency response method is verified and can be applied to online monitoring of field windings.