Fuzzy self-adaptive Smith cascade control system for spraying ammonia in SCR reactors

LI Gang; HU Sen; WU Baohui

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Fuzzy self-adaptive Smith cascade control system for spraying ammonia in SCR reactors

Thermal Power Generation Vol. 43, Issue 8, Pages: 147-150(2014)

更新时间：2025-09-28

- Fuzzy self-adaptive Smith cascade control system for spraying ammonia in SCR reactors
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 西安电力高等专科学校电力工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2014
- 稿件说明：
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LI Gang, HU Sen, WU Baohui. Fuzzy self-adaptive Smith cascade control system for spraying ammonia in SCR reactors[J]. Thermal Power Generation, 2014, 43(8): 147-150.
DOI：

LI Gang, HU Sen, WU Baohui. Fuzzy self-adaptive Smith cascade control system for spraying ammonia in SCR reactors[J]. Thermal Power Generation, 2014, 43(8): 147-150. DOI：

摘要

基于对选择性催化还原(SCR)反应器喷氨量控制过程大延时产生原因的分析

提出了模糊自适应Smith串级控制策略:采用Smith预估控制喷氨量;采用模糊规则在线修正PID参数。从而

使得控制器能够有效适应控制对象的变化。将模糊自适应Smith串级控制与常规PID串级控制进行仿真比较

结果表明该模糊自适应Smith串级控制效果优于常规PID串级控制

并且当控制对象的模型有较大变化时

仍能够保持较好的控制品质

具有较强的适应性。

Abstract

By analyzing the cause of large delay in ammonia spraying control in SCR reactor

the fuzzy self-adaptive Smith cascade control system was applied.In this method

the Smith cascade controller is used to predictively control the spraying ammonia flow and the fuzzy rules are used to adjust the PID parameters online.So the controller can adapt to changes of the control object effectively.Comparison between the fuzzy self-adaptive Smith cascade control system and the conventional PID cascade controller was carried out by simulation testing.The results show that

the control effectiveness of this Smith cascade controller was superior to that of the conventional PID cascade controller

and good control performance can be maintained when the model of control object changed

indicating the Smith cascade controller has strong adaptability.

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