Abstract: Based on the principle of system dynamics, from the perspective of mass and energy conservation, taking the causal loop diagrams and the stock and flow diagrams as the carriers, and starting from the running mechanism of the system, the system dynamics model for the boiler superheated steam temperature system was established. This model has clear structure and reasonable complexity. By using the high temperature super-heater of the 300 MW boiler-turbine unit of Hebei Qingyuan Power Plant as the research object, simulation studies were carried out in Vensim PLE environment. The simulation curves were compared with the curves of the actual production data and the traditional model, whose data was identified by using the particle swarm algorithm. The results of the comparisons verify the effectiveness and rationality of the established model.

Key words: superheated steam temperature, system dynamics, causal loop diagram, stock-flow diagram, modeling