Modeling of Characteristics of Supercritical Unit Coordination System Based on SDAE
In order to improve the coordinated control quality with predictive optimal control method,the stack de-noising autoencoder(SDAE)is employed to build the mathematical model of the coordination system characteristics for a supercritical power unit.Firstly,the simulation data obtained by the full-scope simulator of a 600 MW supercrit-ical power unit are normalized,and the pretreated data are used to complete the training of the model.Finally,the model was incorporated into the simulator to verify its dynamic performance by single input-variable step disturbance tests and large-scope variable load experiments.The simulation results show that the model is with strong generaliza-tion ability and high precision,which can well describe the complex nonlinear dynamic characteristics between fuel flowrate,steam turbine regulating valve opening and feedwater flow and main steam pressure,unit load.It can meet the design requirements of an intelligent controller of the supercritical power unit.
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