大型火电机组协调系统的双线性自抗扰控制  

Double Linear Active Disturbance Rejection Control for the Coordinated System of Thermal Power Plant

作　　者：马永光[1] 张瑞青[1,2] 马良玉[1] 王兵树[1] 栗国臣 

机构地区：[1]华北电力大学控制与计算机工程学院,河北保定071003 [2]河北农业大学机电工程学院,河北保定071001 [3]中航工业惠阳航空螺旋桨有限责任公司,河北保定072152

出　　处：《测控技术》2014年第11期89-92,共4页Measurement & Control Technology

摘　　要：针对大型火电机组参与电网调峰调频而常处于变负荷工况运行的特点,传统的PID协调控制策略难于满足系统要求,以某600 MW超临界机组为对象,设计了以"炉跟机"为基础的协调系统的双线性自抗扰控制(LADRC)。利用观测器观测的扩张状态补偿系统內外扰动,针对锅炉侧的迟滞对锅炉LADRC增加了前馈补偿;基于Matlab编写LADRC控制算法,借助该机组的全范围仿真机开展变负荷扰动仿真实验。结果表明,该协调系统LADRC对负荷和主汽压力的抗扰控制效果优于PID控制。该算法整定参数少,易于工程应用。For frequently changing load conditions of the thermal power plants,which often participate in peak regulation and frequency modulation,a traditional PID coordinated control scheme is difficult to meet the power grid demand,which is apt to slow load response and has a large main steam pressure deviation.A double linear active disturbance rejection control（LADRC） is designed to the coordinated control system based on ＂boiler following turbine＂ for a 600 MW supercritical power unit.Using extended state observers to estimate the unmodeled dynamic and unknown disturbance in real time,load feedforward signal is introduced into the boiler LADRC to deal with the boiler-side delay.The LADRC is programmed with Matlab,and load-changing disturbance is tested respectively with the LADRC and original PID controllers on the full-scope simulator of the given thermal power unit.The result shows that the anti-disturbance control effect of LADRC for load and main steam pressure is significantly better than the PID controllers.This LADRC control scheme is simple,with less parameters to turn,and easy to apply in engineering.

关 键 词：大型火电机组协调系统 双线性自抗扰控制 前馈 扩张状态观测器 仿真实验 

分 类 号：TP272[自动化与计算机技术—检测技术与自动化装置]