The online detection of winding deformations is seldomly investigated so far.Therefore

we proposed a detection method system of the high voltage shunt reactor winding deformation based on the impulse coupling injecting analysis

and the corresponding system is developed.Then

the detection system is verified and installed in 750 k V high voltage shunt reactor of a certain substation.It is concluded from the obtained frequency response characteristics of threephase high-voltage shunt reactors that the response voltage of 300 m V can be obtain under the excitation pulse voltage of 500 V; and the fingerprint data are obtained to provide the basis of the condition monitoring and warning of the windings.The reliable operation of power grid will be promoted if the proposed method is applied widely.