The present application relates to the technical field of fault detection, in particular to a
chemical production process abnormal condition identification method and
system, comprising the following steps: collecting reactor temperature concentration and flow and aligning and denoising to generate a multi-source
time sequence set, extracting spatial
measurement point temperature difference and differentiating symbols to generate a
temperature difference direction sequence, calculating conversion amount based on concentration and flow and calculating rate gradient and direction sequence inversion comparison to generate heat release inversion sequence, obtaining
inversion time and spatial coordinates and misaligning to align to form a
lag mismatch set, combining time window temperature change and mismatch frequency to input a
support vector machine classification to obtain abnormal condition identification results, in the present application, a multi-
source synchronous time sequence set is constructed to extract
temperature difference direction, spatial gradient is calculated to obtain inversion characteristics, time and space misalignment is implemented to align to capture physical conduction
lag law, mismatch frequency is used to rely on a
support vector machine to perform classification,
single point limitations in dealing with conduction
lag are overcome, the technical problem that hidden faults are easily covered is solved, and accurate identification of abnormal variations in complex conditions is realized.