Auxiliary analysis method for SER abnormal data of flexible direct current back-to-back converter station

The invention discloses a flexible direct current back-to-back converter station SER abnormal data auxiliary analysis method, which comprises the following steps of: obtaining data feature items of an SER log event of a flexible direct current back-to-back converter station, and performing data preprocessing on the obtained data feature items; based on the preprocessed data feature items, establishing a converter station SER event model; determining an SER event support group and an SER confidence event by using an Apriori algorithm according to the established converter station SER event model; judging whether the SER event generated by the converter station is abnormal or not according to the determined SER event support group and the SER confidence event; and when it is judged that the SER event generated by the converter station is abnormal, alarming is carried out. The method is used for assisting in judging whether operation mode conversion and direct current protection action results are correct and in