Cogeneration unit primary frequency modulation method based on heat supply network heat storage

The invention discloses a cogeneration unit primary frequency modulation method based on heat supply network heat storage, and the method comprises the steps: S1, employing a machine learning method to mine the corresponding relation between the opening degree of a steam extraction valve of the combined heat and power generation unit and the unit electric power from the historical operation data of the heat supply pipe network and the combined heat and power generation unit under the conditions of different total steam flows; S2, performing online real-time prediction and situation evaluation on the total heat load of the heat supply pipe network by using a machine learning method; and S3, evaluating and calculating the heat storage capacity constraint in the heat supply pipe network on line in real time by adopting a method of combining a mechanism model and a data model, ensuring the constraint of the steam supply parameter quality of an end user, and analyzing the capacity margin of heat storage and heat r