Digital signal filtering device for hydroelectric control system

The utility model discloses a digital signal filtering device for a hydroelectric control system, which comprises an input unit, a metastable state elimination unit, a filtering unit and an output unit. The input unit is used for providing a digital signal to be processed and a preset reference signal; the metastable state elimination unit is used for eliminating the metastable state of the digital signal to be processed to obtain a digital signal after the metastable state is eliminated; the filtering unit is used for carrying out filtering processing on the digital signal after metastable state elimination to obtain a digital signal after filtering processing; the output unit is used for outputting the filtered digital signal; according to the utility model, metastable state elimination and filtering of digital signals are realized, and the metastable state of the signals in the transmission process is eliminated; meanwhile, interference existing in digital signals can be eliminated, and stable signal outpu