Coupling problems and the decoupling control for control system of coal mills

WANG Haitao Xi'an Thermal Power Research Institute Co.

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Coupling problems and the decoupling control for control system of coal mills

Thermal Power Generation Vol. 42, Issue 2, Pages: 58-61(2013)

更新时间：2025-09-28

- Coupling problems and the decoupling control for control system of coal mills
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK223.25
- Published：2013
- 稿件说明：
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WANG Haitao Xi'an Thermal Power Research Institute Co.. Coupling problems and the decoupling control for control system of coal mills[J]. Thermal Power Generation, 2013, 42(2): 58-61.
DOI：

WANG Haitao Xi'an Thermal Power Research Institute Co.. Coupling problems and the decoupling control for control system of coal mills[J]. Thermal Power Generation, 2013, 42(2): 58-61. DOI：

摘要

在对磨煤机控制系统耦合问题分析的基础上

对原磨煤机控制系统进行了优化。在磨煤机控制系统中增加了解耦环节

并将给煤机转速指令作为磨煤机入口一次风量和出口温度控制系统的前馈信号。优化后的磨煤机控制系统在机组负荷和给煤量基本稳定时

磨煤机出口温度偏差被控制在±1℃内

磨煤机入口一次风量随给煤量变化而变化

其偏差控制在±2t/h内;在机组负荷由200MW升至230MW时

磨煤机入口一次风量随给煤量变化而变化

其动态偏差控制在±3t/h内

磨煤机出口温度偏差控制在±1.5℃内。上述结果表明

该磨煤机控制系统调节品质优良。

Abstract

By analyzing the coupling problems in coal mill control system

optimization on control system of the original coal mill was conducted.Decoupling link was added in the control system

and the speed instruction of coal feeder was set as the feedforward signal of control system for inlet primary air flow and outlet temperature of the coal mill.The optimized coal mill control system can make the outlet temperature deviation be within ±1 ℃

and the inlet primary air flow(which varied with the coal feed) deviation be within ±2 t/h

under steady unit load and coal feed condition.When the unit load increased from 200 MW to 230 MW

the inlet primary air flow varied with the coal feed

its dynamic deviation can be controlled within ±3 t/h

and the outlet temperature deviation can be kept within ±1.5 ℃.

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