The invention provides a charging behavior prediction model construction and prediction method and
system based on a
large model, and the method comprises the steps: carrying out the
time sequence arrangement of a plurality of groups of historical charging data, selecting the historical charging data of a corresponding group number according to the
window width of an incremental window method and a
time sequence, and constructing a plurality of samples, and obtaining a sample set; the
window width is gradually increased as time goes on; based on the sample set, training a large
language model by adopting a low-rank adaptive supervised
fine tuning method to obtain a charging behavior prediction model, and performing prediction by adopting the charging behavior prediction model to obtain charging data of next charging of the to-be-predicted user; according to the method and
system, a sample set is constructed through multiple groups of historical charging behavior data and an incremental window method, multi-source information is fused, and the application value and prediction accuracy of a prediction model are improved; and meanwhile, historical charging behavior data of the user is deeply understood by utilizing the generation capability of the large
language model to carry out comprehensive prediction, richer and more accurate prediction results are provided, and the
interpretability of the prediction results is improved.