Sliding Mode Predictive Optimization Control Strategy of Main Steam Pressure in Gas-Fired Power Boiler

doi:10.7652/xjtuxb202101008

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Sliding Mode Predictive Optimization Control Strategy of Main Steam Pressure in Gas-Fired Power Boiler

更新时间：2025-07-09

- Sliding Mode Predictive Optimization Control Strategy of Main Steam Pressure in Gas-Fired Power Boiler
- Vol. 55, Issue 1, Pages: 60-67(2021)
- 作者机构：
  
  安徽工业大学电气与信息工程学院,安徽,马鞍山,243032
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202101008
  CLC： TM621
- Online First：10 January 2021，
  
  Published：2021
- 稿件说明：
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Sliding Mode Predictive Optimization Control Strategy of Main Steam Pressure in Gas-Fired Power Boiler[J]. 2021, 55(1): 60-67.
DOI：

Sliding Mode Predictive Optimization Control Strategy of Main Steam Pressure in Gas-Fired Power Boiler[J]. 2021, 55(1): 60-67. DOI： 10.7652/xjtuxb202101008.

摘要

针对燃气发电锅炉主汽压控制的非线性、纯滞后和强干扰特点

提出了一阶时延模型的主汽压滑模预测优化控制策略。利用广义预测控制对滑模控制器的增益及主汽压作出实时预测

根据主汽压预测偏差对滑模增益进行反馈校正和滚动优化

以降低滑模控制系统的抖振。对煤气调节阀的流量特性进行非线性补偿

通过优化目标函数求出离散形式的最佳控制律。仿真结果表明:与常规PID、滑模控制和动态矩阵控制相比

模型适配时所提出的控制策略使调节时间最多减少19.1 s

超调量最多降低16.4%; 滑模函数抖振小

系统抗干扰及鲁棒性良好。工程应用表明:使用所提策略后

系统抖振比单一滑模控制的降低60%

主汽压控制偏差小于±0.05 MPa

系统稳定性和抗干扰能力明显提高。

Abstract

Aiming at the characteristics of non-linearity

pure lag and strong interference in the main steam pressure control of gas-fired power boilers

a first-order time-delay model of the main steam pressure sliding mode predictive optimization control strategy is proposed. The generalized predictive control is used to make real-time predictions of the gain and main steam pressure of the sliding mode controller. According to the prediction deviation of the main steam pressure

feedback correction and rolling optimization are exerted on the sliding mode gain to reduce the chattering of the sliding mode control system. By providing a nonlinear compensation to the flow characteristics of the gas control valve

the best control law in discrete form is obtained via optimizing the objective function. Compared with conventional PID control

sliding mode control and dynamic matrix control

the simulations show that the proposed control strategy during model adaptation reduces the adjustment time by up to 19.1 s and the overshoot by up to 16.4%; the sliding mode function chattering is small

and the system has good anti-interference

following and robust performances. The engineering application indicates that once adopting the proposed strategy

the system chattering is reduced by 60% compared with single sliding mode control

the main steam pressure control deviation is less than ±0.05 MPa

and the system stability and anti-interference ability are significantly improved.

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references

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