Time-frequency analysis of unit and hydropower house vibration of pumped storage unit in start-up process of hydraulic turbine operating condition
The time-frequency characteristics of the unit's swing,vibration,hydropower house vibration and pressure fluctuation are studied with the change of the rotating speed of the pumped storage unit in the start-up process of hydraulic turbine operating condition.The results show that when the hydraulic turbine operating condition starts,the unit swing signal has obvious rotating frequency and its harmonics in the process of speeding up the unit.The unit vibration signals and the hydropower house vibration signalshavethree times the hydraulic turbine blade passing frequency obviously.There is no obvious relationship between the main frequencies,the pressure fluctuation signaland the rotating speed of the unit.The pressure fluctuation has low frequency random fluctuation characteristic.
国家科技期刊平台
NSTL
万方数据
维普
