Modeling And Simulation Of Thermal Power Unit Coordination System Based On Matlab/Simulink

Coordination control system is the center of control system of thermal power unit.Establishing an accurate mathematical model of thermal power unit coordination system is the basis for the design and research of coordination control system.Due to the characteristics of high parameters,large inertia,multi-variable and strong coupling,how to establish a more accurate coordination system model has become one of the hot topics in the field of thermal engineering in recent years.As a powerful general simulation platform,matlab has been widely used in the field of control.It has good practicability to model and simulate the thermal power unit coordination system based on matlab/simulink platform.In this paper,two coordination system modeling methods are studied for drum furnace units.The first is the transfer function model.Firstly,the basic structure of the mathematical model of the object is determined by analyzing the mechanism of the coordination system.Then,the transfer function model is obtained by using the improved adaptive particle swarm optimization algorithm to identify the parameters of the model using the field operation data.The second is the online data model.In the support vector machine method,the addition strategy is introduced to update the model online and ensure the accuracy of the model,and the kernel function caching technology and deletion strategy are introduced to ensure the real-time performance of the model.Finally,on matlab/simulink platform,the development of coordination system model library is realized.The model can reflect the dynamic characteristics of unit operation and provide a basis for the design of coordinated control scheme.The simulation results show that the two coordination system models have good accuracy and practicability,but their application occasions are different.Transfer function model can describe the internal relationship of coordination system,but it needs to be re-identified when equipment modification and other factors lead to the change of coordination system characteristics.The online data model has the function of online correction,and can adapt to the change of coordination system characteristics.