【摘要】 超临界火电技术具有高效率、强负荷适应性等优点,使得超临界机组直流锅炉成为火力发电厂的主要机组。火电厂燃料控制系统中被控对象具有非线性、强干扰、滞后性、大惯性等特点,使得常规PID控制效果不是很理想。而燃料控制系统主要承担着维持主蒸汽压力稳定的重任,其稳定性会影响到机组设备的安全高效运行。因此将模糊控制与PID控制相结合,设计了模糊自整定PID控制器对燃料控制系统进行MATLAB仿真。仿真实验表明,模糊自整定PID控制相对于传统PID控制超调小并且调节时间短,同时具有更好的鲁棒性能。更多还原

【Abstract】 The supercritical thermal power technology has the advantages of high efficiency and strong load adaptability, it makes the DC boiler of the supercritical unit to become the main unit of power plant. The control object of the fuel control system in the thermal power plant has the characteristics of the non-linearity, the strong disturbance, the hysteresis and the large inertia, it makes the conventional PID controller effect not very ideal. The fuel control system is mainly responsible for maintaining the stability of the main steam pressure. Its stability affects the safe and efficient operation of the unit equipment. Therefore, the fuzzy controller and PID controller are combined to design a fuzzy self-tuning PID controller to simulate the fuel control system. Simulation results show that the fuzzy self-tuning PID controller is smaller with shorter adjustment time and better robust performance compared with the traditional PID control.更多还原