Abstract:Considering that the current high-altitude substation"s alarm data is large and the efficiency of operation and maintenance staffs is affected, this paper presents an analysis method of alarm data based on association rules. After identifying the pilot-successive relationship covered in the numerous alarm data, the fault analysis method is constructed, which is helpful for determining the root cause of the fault. Meanwhile, referring to the grid company"s power equipment status assessment standard, alarm events relationships and weights of each inspection unit determine the priority of the inspection after OWS frequently alarms, which contributes to improve inspection efficiency. Finally, this method is illustrated through the alarm data of a station transformer for nearly one year, and the reasons that the transformer frequently alarm are raised. Besides, the inspection strategy is proposed.