Early warning method and early warning system for power monitoring indexes

The invention discloses an early warning method and an early warning system for power monitoring indexes, and relates to the technical field of data processing. Obtaining index data of the power monitoring system at a first frequency, preprocessing the index data to obtain a standard index, and calculating to obtain a comprehensive score according to the standard index; sampling the comprehensive scores at a second frequency to obtain a score set, taking the comprehensive scores taking a preset number as groups in the score set as target groups, and performing deviation degree detection on the multiple target groups and the characteristic curve in sequence; and if the deviation degree of the target group and the characteristic curve is higher than a preset deviation degree, judging that the target group is abnormal data, increasing the second frequency to obtain a third frequency, sampling a comprehensive score at the third frequency, and performing early warning if the occurrence frequency of the abnormal da