循环流化床锅炉-汽轮机组智能协调控制

Xiao-Feng Li, Shihe Chen, Qing Zhong
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引用次数: 4

摘要

提出了一种智能协调控制策略,并成功应用于135 ~ 300MW循环流化床(CFB)锅炉-汽轮机组。由于循环流化床燃烧系统是一个具有复杂特性的对象,很难建立精确的数学模型并用传统的控制理论对其进行控制。介绍了循环流化床(CFB)机组的智能协调控制系统。ICC是基于模糊前馈控制和模糊pid反馈控制。前馈控制路径包含一组多输入单输出模糊推理系统。控制输出主要由前馈路径决定,减少了PID控制器的控制努力。模糊pid控制器为指令轨迹的小邻域内调节和抑制干扰提供了互补的控制信号分量。该方案基于功能码在多种典型DCS (INFI-90、XDPS等)上实现。工业应用结果表明,该设计方案在负荷变化的特定范围内效果良好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Intelligent coordinated control of circulating fluidized bed boiler-turbine unit
An intelligent coordinated control strategy has been proposed and successfully applied to 135∼300MW circulating fluidized bed (CFB) boiler-turbine units in China. Because the combustion system of the CFB is a complex object characterized, it is difficult to build precise mathematic model and control it with traditional control theory. The paper describes intelligent coordinated control (ICC) system for the circulating fluidized bed (CFB) unit. ICC is based on both fuzzy feedforward control and the fuzzy-PID feedback control. The feedforward control path contains a set of multi-input single-output fuzzy inference systems. The control ouput is mainly determined by the feedforward path, diminishing the control effort on the PID controllers. The fuzzy-PID controller supplies the complementary control signal component for regulation and disturbance rejection in small neighborhoods about the commanded trajectories. The scheme is implemented based on the Function Code on many typical DCS (INFI-90, XDPS, etc). The industrial application results show that this design scheme works well for the specific range of load variations.
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