基于线性自抗扰的直接空冷机组背压控制  

Back Pressure Control of Direct Air Cooled Unit Based on Linear Active Disturbance Rejection Control

作　　者：李越泽 于会群 姚雨辰 徐春梅 樊浩男 LI Yueze;YU Huiqun;YAO Yuchen;XU Chunmei;FAN Haonan(College of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学自动化工程学院,上海200090

出　　处：《流体测量与控制》2025年第2期16-21,共6页Fluid Measurement & Control

摘　　要：直接空冷机组的背压控制系统中存在有大时滞环节,并且受负荷扰动影响较大,而传统的PID控制对该过程的控制效果往往不佳。针对此问题,提出一种利用Smith预估器改进的线性自抗扰控制(LADRC)算法。首先利用山西某电厂采集到的实时运行数据,通过灰狼优化(GWO)算法对直接空冷机组的背压系统进行系统辨识,得到控制系统的模型与负荷扰动模型;再利用Simulink仿真平台搭建改进的LADRC控制器对模型进行控制,并将改进后的LADRC和传统PID方法进行对比。通过仿真结果表明,改进后的LADRC控制器相比较传统PID方法,可以更好地解决系统中存在的大时滞环节,并且具有较好的抗干扰能力,从而保证背压控制的效果。The backpressure control system of direct air cooled units has a large time delay link and is greatly affected by load disturbances,while traditional PID control often has poor control effects on this process.This article proposes an improved linear active disturbance rejection control(LADRC)algorithm using Smith predictor to address this issue.Firstly,this article uses real-time operating data collected from a power plant in Shanxi to identify the backpressure system of a direct air-cooled unit using the grey wolf optimization(GWO)algorithm.The control system model and load disturbance model are obtained.Furthermore,an improved LADRC controller is built on the Simulink simulation platform to control the model.The improved LADRC is compared with the traditional PID method.The simulation results show that the improved LADRC controller can better solve the large time delay links in the system compared to the traditional PID method,and has good anti-interference ability,thereby ensuring the effectiveness of back pressure control.

关 键 词：直接空冷机组 背压控制系统 灰狼优化算法 系统辨识 线性自抗扰控制 Simth预估器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]