Short-term load prediction method and system

The invention discloses a short-term load prediction method and system. The method comprises the following steps: acquiring historical load related data of a target power system, and preprocessing the historical load related data; taking the preprocessed historical load related data as input; establishing a third load prediction model based on the first load prediction model and the second load prediction model; and according to the real-time target power system load related data, determining whether an output prediction value of the third load prediction model satisfies a demand or not, and if yes, completing establishment of the third load prediction model. According to the method, firstly, according to the accuracy of a historical load prediction result and the volatility of real-time data, the weights of a first load prediction model and a second load prediction model in a third load prediction model are dynamically adjusted; through continuous optimization and adjustment, the third load prediction model