Wu Zhenlong, Li Donghai, Xue Yali, Sun Liming, He Ting, Zheng Song
State Key Lab of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China.
State Key Lab of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China.
ISA Trans. 2020 Jul;102:135-153. doi: 10.1016/j.isatra.2020.03.003. Epub 2020 Mar 9.
As a widely-used technology, fluidized bed combustor (FBC) boiler is facing many control challenges such as coupling, high-order dynamics and nonlinearity. With more and more sustainable energy integrating into the bulk power system, the FBC boiler is obliged to speed up the respond to the automatic generation control command and this results in great challenges for keeping the bed temperature in the desired range. To this end, a modified active disturbance rejection control (MADRC) is put forward for high order systems with the type of K∕(Ts+1) to enhance the control quality of the FBC boiler. Firstly, a simulation is carried out to discuss the estimation ability of the MADRC. A theorem about the stability analysis of the MADRC is provided and proofed theoretically. To help the field personnel to understand and use more easily, an effective tuning procedure is also concluded. Besides, a tuning toolbox based on the tuning procedure is established. Simulations and comparative experiments based on the Peltier temperature control platform validate the superiority of the MADRC, where the MADRC is able to enhance the control quality. Then the MADRC and other comparative controllers (the proportional integral controller and the regular ADRC) are designed for the FBC boiler. Simulation results illustrate that the MADRC can obtain the best performance. Statistical indices show that the MADRC has the smallest overshoot and shortest settling time. In addition, the MADRC still has the strongest ability to reject the input and coal quality variation disturbances. The advantages of the MADRC guarantee the high control quality and can be applied to industrial practice widely.
作为一种广泛应用的技术，流化床燃烧器（FBC）锅炉面临着许多控制挑战，如耦合、高阶动态特性和非线性。随着越来越多的可持续能源并入大容量电力系统，FBC锅炉必须加快对自动发电控制指令的响应速度，这给将床温保持在期望范围内带来了巨大挑战。为此，针对K∕(Ts + 1)型高阶系统提出了一种改进的自抗扰控制（MADRC），以提高FBC锅炉的控制质量。首先，进行了仿真以讨论MADRC的估计能力。给出并从理论上证明了一个关于MADRC稳定性分析的定理。为帮助现场人员更易于理解和使用，还总结了一种有效的整定方法。此外，基于该整定方法建立了一个整定工具箱。基于珀耳帖温度控制平台的仿真和对比实验验证了MADRC的优越性，MADRC能够提高控制质量。然后为FBC锅炉设计了MADRC和其他对比控制器（比例积分控制器和常规ADRC）。仿真结果表明，MADRC能获得最佳性能。统计指标表明，MADRC具有最小的超调量和最短的调节时间。此外，MADRC对输入和煤质变化干扰的抑制能力也最强。MADRC的优势保证了其高控制质量，可广泛应用于工业实践。
