TH.2026.04.015]
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基于 MPC 的高低旁路与中调门协同供汽控制策略研究()

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

Title:: Research on the control strategy of high - low bypass and mid - tone gate coordinated steam supply system based on MPC

Author(s):: ZHANG Jie 1; ZHANG Weijun 1; LIU Yuan 1; TAO Qing2; 1. Guoneng Feixian Power Generation Co., Ltd., Shandong Linyi 273425, China; 2. CHN ENERGY Energy Conservation Technology Co., Ltd., Beijing 100143, China

Keywords:: multivariable predictive control; high - low bypass; medium - pressure governor; coordinated control; steam extraction; thermal re - pressurization

摘要:: 随着工业供汽与灵活性发电需求的日益增长，燃煤机组控制系统面临新的挑战。传统供汽方式在变负荷工况下存在供汽参数波动大、机组运行经济性差及安全性风险等问题。针对高低旁路供汽系统，提出了一种多变量预测控制优化策略。以工业供汽压力稳定为核心目标，打破传统单一调节的局限，统筹协调高压旁路阀、中压调门等多项关键执行机构，实现多执行机构的协同联动控制。通过建立系统的简化动态数学模型，并设计多变量预测控制器，在Matlab/Simulink平台进行了仿真验证。结果表明，该优化控制策略效果突出，在机组负荷大幅扰动的场景下，高压旁路阀与中压调门能够在运行约束范围内快速响应、协同动作，有效抑制参数波动，热再压力可快速稳定在 3.5MPa的目标值，供汽压力稳定性得到显著提升。

Abstract:: With the increasing demand for industrial steam supply and flexible power generation, coal - fired unit control systems are facing new challenges. Traditional steam supply methods exhibit large fluctuations in steam supply parameters, poor operational economy, and safety risks under variable load conditions. This paper proposes a multivariable predictive control optimization strategy for high - low bypass steam supply systems. Centered on stabilizing industrial steam supply pressure, this strategy breaks the limitations of traditional single regulation, coordinating multiple key actuators such as high - pressure bypass valves and medium - pressure dampers to achieve collaborative control among multiple actuators. By establishing a simplified dynamic mathematical model of the system and designing a multivariable predictive controller, simulations were conducted on the Matlab/Simulink platform. The results indicate that the optimization control strategy is highly effective. Under scenarios of significant unit load disturbances, the high - pressure bypass valves and medium - pressure dampers can respond quickly and act collaboratively within operational constraints, effectively suppressing parameter fluctuations. The reheating pressure can rapidly stabilize at the target value of 3.5MPa, significantly improving the stability of the steam supply pressure.

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更新日期/Last Update: 1900-01-01