The invention discloses a converter
station important event diagnosis method based on correlation causal, comprising the following steps: collecting and preprocessing a converter
station historical message, and carrying out SER
event modeling; recording sequence events in the
database, namely SER events occurring according to a
time sequence, and mining association rules by utilizing an Apriori method according to the events, fault information and manual operation information; redundant rule
pruning is carried out by using a confidence enhancement method,
hybrid variable control is carried out on the pruned rule, and potential
hybrid variables are eliminated; and finally, reducing the causal rule through an OR statistical causal method to obtain the causal rule of SER event occurrence during the
fault occurrence period and the manual operation period. According to the method, redundant rule
pruning and
hybrid variable control links are introduced, the rules mined from the association rules are subjected to previous rule
pruning, the event scale is reduced, the calculation pressure of OR during causal statistics is relieved, and the method is low in data demand and high in diagnosis accuracy.