Control Research Of Outlet Steam Temperature For DSG Solar Power Based On Fuzzy Dynamic Matrix Control

Solar thermal power generation is an important way to large-scale use of solar energy, has huge development potential and broad market prospects. Direct steam generation(Direct Steam, Generation, DSG) of parabolic trough solar thermal power generation system has the advantages of simple structure, the steam temperature is high, the steam temperature is high, can greatly reduce the investment and operation cost of power plant, and has higher efficiency, provides a promising technology for solar thermal power generation.DSG trough solar thermal power generation system has the characteristics of obvious lag, great inertia and nonlinear, the control effect of traditional PID control is difficult to reach the ideal. Because the inherent characteristics of the DSG system, and gradually solve the problem of the process control is of great significance.In this paper, the dynamic matrix control(Dynamic Matrix Control, DMC) strategy is applied to the process control of superheated steam in DSG trough solar thermal power generation system under recirculation operation mode, in the different typical working conditions of the DMC controller is designed accordingly. Simulation results show that, compared with the anti-windup PI controller, DMC control system can significantly improve the response speed of steam temperature control process, fast tracking of the given value in the presence of disturbances and model mismatch situations can be achieved also, initially proved the feasibility of DSG trough solar thermal systems DMC control scheme.Application of DMC control strategy simulation experiments, when the model mismatch, between the actual object and the model prediction error will occur, to solve this problem, this paper introduces the fuzzy control based on the original DMC controller, composed of fuzzy dynamic matrix control algorithm(FDMC). The simulation results show that: compared with DMC control system,FDMC control system can significantly improve the response speed of steam temperature control process, fast tracking of the given value in the presence of disturbances and model mismatch situations can be achieved also, and FDMC control system improves the robustness of the superheated steam control in DSG trough solar power system.