Abstract
Abstract Draft tube pressure pulsation, as a long-term phenomenon, affects the key to stable unit operation. Based on data from actual power plants, this study qualitatively analyses the relationship between unit vibration parameters and draft tube pressure pulsation under variable load. Then the nonlinear correlation coefficient of mutual information (MI) between draft tube pressure pulsation and external vibration factors is obtained by quantitative calculation from data analysis and probability statistics. The feasibility of this method is demonstrated, and it provides a basis for the subsequent prediction of draft tube pressure pulsation based on the external vibration factors screened by mutual information.
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