The rotor fault diagnosis system of generator based on compositive characteristics of vibration and electric

Firstly the generator vibration characteristics and stator winding parallel branches circulating current characteristics caused by rotor faults were analyzed,such as the rotor winding inter-turn short circuit fault,the air-gap static eccentric fault,the air-gap dynamic eccentric fault and the imbalance fault.Considering the differences of rotor vibration and circulating current characteristics caused by different rotor faults,a generator rotor fault diagnosis method,based on compositive characteristics of rotor vibration and circulating current,was developed.Then the software of the LabVIEW and the hardware of data acquisition card PCI-6251 was selected respectively.The fault diagnoses system was designed based on virtual instrument.Its function was made up of the signal acquisition,signal analyzing,database management,parameter query,and fault diagnosis.Finally,the fault diagnosis system was successfully applied to SDF-9 generator.