On-line monitoring system of hydropower station gate opening equipment based on wavelet theory

Theory analyze and strain gauge analyze is usually used in diagnosis of accident of opening equipment. Theory analyze can't express system exactly and sometimes make diagnosis error and is not fit for dynamic analyze. Strain gauge analyze can't use long and is not real-time means, which is not fit for on-line monitoring. A new method based on wavelet theory of diagnosis of hydropower station opening equipment fault is presented in this paper. By on-line monitoring status of the opening equipment, it is intended to discover the reason of the fault and prevent fault again. A model is designed for the opening equipment steeve and de-noise is carried out in the steeve tension, so the random noise is weakened. It has been studied that fluid frequency forced on the gate brought by vanes is 15 Hz, which may bring the gate steeve resonates and opening equipment fault.