Control-oriented composite dynamic modeling method for NCB type steam turbine heat supply system

The invention discloses a control-oriented NCB type steam turbine heat supply system composite dynamic modeling method, which comprises the following steps of: respectively establishing NCB type steamturbine and heat supply network heater simplified mechanism models of an NCB type combined heat and power supply combined cycle unit based on three conservation laws, and determining a model structure and parameter types and quantity; solving static parameters based on the design data of the NCB type combined heat and power supply combined cycle unit, fitting an undetermined function for the typical working condition of the NCB type combined heat and power supply combined cycle unit, and identifying dynamic parameters in a closed-loop manner by adopting a particle swarm optimization algorithmbased on the operation data of the NCB type combined heat and power supply combined cycle unit; and verifying the accuracy of the model by utilizing the actual operation data of the NCB type combinedheat and power generation