Study on Vibration Fault Mechanism and Suppression Method Induced by Rotor-stator Interaction and Phase Resonance of Pumped-storage Power Unit
Rotor-stator interaction and phase resonance faults have a direct effect on the operation of the pump turbine of the pumped-storage power station.In this paper,the hydraulic excitation modes generated by rotor-stator interaction are systematically investigated with a hydraulic turbine as an object,and the risk of phase resonance is assessed.The influence factors of factory vibration caused by rotor-stator interaction of Zhanghewan and Heimifeng pumped-storage pump turbine are calculated and analyzed by examples.At the same time,by counting the hydraulic parameters of some pumped-storage power stations in China,rotor-stator interaction hydraulic excitating vibration mode and the phase resonance risk coefficient BF are calculated,and the corresponding pre-control measures are proposed.This provides a reference for the vibration problems of other large pumped-storage power stations and provides a positive reference for the safety and stability of the large-scale pumped-storage power stations to be built.
pumped-storage powerhydraulic exciting vibrationrotor-stator interactionphase resonancevibration faultpassing frequency
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