Design of tracking controller for coordinated boiler-turbine control system based on fuzzy Lyapunov functions

作者：Liu, Shanjian; Liu, Xichui; Shen, Jiong^*; Li, Yiguo; Wu, Jie

来源：Proceedings of the CSEE, 2013, 33(11): 96-103.

• Boiler-turbine control
• Co-ordinate system
• Common Lyapunov functions
• Fuzzy Lyapunov functions
• Parallel distributed compensation
• Robust tracking controller
• Tracking controls
• Uncertain parameters

Since the thermal power boiler-turbine system has high nonlinearity, and its parameters change in the operation, a design method of robust tracking controller was proposed to solve this problem for T-S fuzzy model based on boiler-turbine system. Firstly, a split-and-substitute method was presented to deal with the nonlinear term in the system model. The T-S fuzzy model with uncertain parameters was established when the parameters'changes were taken into account. Then the parallel distributed compensation (PDC) scheme was employed to design the fuzzy controller. The stability analysis based on fuzzy Lyapunov functions was derived in terms of linear matrix inequalities for continuous fuzzy system. Compared with the stability conditions based on the common Lyapunov functions, the proposed stability conditions in this paper is less conservative. Finally, the designed robust tracking controller was applied to a coordinated boiler-turbine system. The simulation results demonstrate the effectiveness of the proposed design method.

• 出版日期2013-4-15
• 单位华南理工大学; 东南大学