This invention discloses a method,
system, device, and storage medium for online monitoring and diagnosis of
partial discharge in generators. It acquires pulse signals from different parts of the generator casing and uses an adaptive bipolar pulse detection
algorithm to determine the start and end points of each pulse. For each pulse, it extracts amplitude, polarity, energy, width, and phase characteristics within the
power frequency cycle. Combining
pulse rate and average amplitude, it executes a
discharge mode classification
algorithm to obtain
discharge classification results. Based on the
discharge severity index, it calculates the insulation fatigue increment within a single monitoring window, updates the cumulative fatigue value using a time decay model, and triggers corresponding alarm levels based on the cumulative fatigue value. It calculates the
power frequency phase based on the
occurrence time of each pulse, plots a
scatter plot, calculates and sorts the discharge intensity based on the number of pulses, energy, and amplitude from each sensor, and generates an activity heatmap. It extracts the recent average daily fatigue increment, estimates the number of days required for the insulation fatigue value to reach the
critical threshold, and generates a comprehensive diagnostic report.