ANALYSIS OF GENERATOR VIBRATION CHARACTERISTIC ON STATOR WINDING INTER-TURN SHORT CIRCUIT FAULT
Yonggang Li · Proceedings of the CSEE · 2004
Generator rotor and stator vibration characteristics on rotor winding inter-turn short circuit fault are analyzed. Through calculating the generator parameters of air-gap magnetomotive force, air-gap magnetic permeability and magnetic flux density on the fault, the frequency characteristic of imbalance magnetic pull acting on rotor and that of pulsating magnetic pull acting on stator core are found out. Then the rotor and stator radial vibration characteristics can be gotten, which are that rotor vibration of fundamental mechanical rotation frequency will increase, the stator vibration of second mechanical rotation frequency will decrease for one pair of poles generator, and the stator vibration of fundamental and second frequency will increase for many pairs of poles generator. Finally practically acquired vibration data on the spot of SDF-9 and MJF-30-6 type generator respectively, the results of verification show that the analysis is correct.