Short-term power load combined prediction method, system and device and storage medium

The invention provides a short-term power load combination prediction method, system and device and a storage medium, and the method comprises the steps: carrying out the preprocessing of an obtained original power load sequence, obtaining a corresponding initial data set, carrying out the mode decomposition of the initial data set, obtaining a plurality of load mode components with different frequencies, and carrying out the prediction of the load mode components; each load modal component is input into a pre-constructed first DeepAR model for prediction processing, after a corresponding initial load prediction sequence is obtained, a corresponding prediction error sequence is obtained according to the initial data set and the initial load prediction sequence, error prediction is performed according to the prediction error sequence, and a corresponding load error sequence is obtained; and performing error correction on the initial load prediction sequence according to the load error sequence to obtain a corr