Influence of dynamic characteristics of pulverizing system on coordinated control system

ZHANG Ruifeng; PAN Hua; LI Xiaojun; AN Bo; ZHANG Qing

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Influence of dynamic characteristics of pulverizing system on coordinated control system

更新时间：2025-09-28

- Influence of dynamic characteristics of pulverizing system on coordinated control system
- Thermal Power Generation Vol. 44, Issue 7, Pages: 78-82(2015)
- 作者机构：
  
  贵州电力试验研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2015
- 稿件说明：
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ZHANG Ruifeng, PAN Hua, LI Xiaojun, et al. Influence of dynamic characteristics of pulverizing system on coordinated control system[J]. Thermal power generation, 2015, 44(7): 78-82.
DOI：

ZHANG Ruifeng, PAN Hua, LI Xiaojun, et al. Influence of dynamic characteristics of pulverizing system on coordinated control system[J]. Thermal power generation, 2015, 44(7): 78-82. DOI：

摘要

为了提高机组对负荷指令的响应速率

基于火电机组负荷-压力简化非线性动态模型

分析了制粉系统纯迟延和惯性时间对典型协调控制系统的影响

结果表明减小制粉系统纯迟延和惯性时间可以有效提高压力控制品质

并减小燃料量的波动幅度。基于磨煤机简化模型分析了一次风量对制粉系统动态特性的影响

结果显示保持一次风量跟踪燃料量等比例变化、适当增加一次风量动态过调节量能够有效补偿制粉系统大迟延、大惯性对控制系统造成的不利影响。根据以上分析结果对某600 MW机组协调控制系统的制粉系统控制进行了相关参数优化

使机前压力的控制品质得到了显著改善。

Abstract

To improve the unit response rate to load instruction and optimize the coordinated control system in power plants

the effect of delay time and inertia time of pulverizing system on a typical coordinated control system was analyzed

on the basis of the simplified nonlinear dynamic model of load-pressure for thermal power plants.It indicates that

reducing the delay time and inertia time can effectively improve the control performance of pressure and decrease the fluctuation scope of fuel flow.Based on the simplified pulverizer model

the influence of primary air on dynamic characteristics of the pulverizing system was investigated.The results show that keeping primary air changing with fuel flow at a constant ratio and improving dynamic overshoot of primary air can effectively compensate the negative influence of the delay time and inertia time of pulverizing system on the control system.The conclusions were applied in optimization of the pulverizing system parameters for the coordinated control system in a 660 MW unit.The control performance of throttle pressure was improved greatly.

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