Design of Coal Quality Disturbance Free System for Coordinated Control System Based on Gain Scheduling
The economic and stable operation was affected seriously by coal quality disturbance for power plants. Based on model analysis, influence of the disturbance can be considered as gain change of control system. Power capability coefficient of coal was constructed to inhibit it. Accuracy of the coefficient was verified by operating data. Then coal quality disturbance free system based on gain scheduling was designed for coordinated control system. Simulation showed that, the strategy improved control quality obviously, and inhibited the coal quality disturbance. Keywords—coordinate control system, coal quality disturbance, energy coefficient of coal quality, gain scheduling
Research of coordinated control system based on robust control
It is proposed robust control algorithm for inaccurateness of coordinated control system model. In order to improve performance of robust controller, the dynamic compensation is used for balancing the difference of dynamic between boiler side and turbine side. A loop-shaping H∞ controller is designed for a boiler-turbine unit nonlinear model with adding dynamic compensation. In order to implement the complex H∞ controller, a multivariable controller with PID form can be got by reducing robust controller. Simulation show that the effect of robust controller can be approached by multivariable PID controller, and the controller has better robustness and dynamic is improved after dynamic compensation.
NOVEL DESIGN METHOD FOR THE COORDINATED CONTROL SYSTEM BASED ON FUZZY REASONING AND ADAPTIVE CONTROL AND ITS APPLICATION
A novel design method for the coordinated control system is proposed in this paper, by integrating fuzzy reasoning with adaptive control and decoupling techniques. The industrial application results in a 300MW boiler turbine unit show that the coordinated control system that uses this design method has better control performance and stronger adaptability than that of using traditional design method.