电站过热汽温系统的内模PID控制及其仿真  

Internal Model PID Control and Its Simulation in Main Steam Temperature System of Power Plant

作　　者：刘长良[1] 马增辉[1] 开平安 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]国家发改委能源研究所,北京100010

出　　处：《系统仿真学报》2014年第11期2722-2726,2733,共6页Journal of System Simulation

基　　金：国家自然科学基金项目(61203107);中央高校基本科研业务费专项资金(13MS102;13MS90);新能源电力系统国家重点实验室课题;国家科技支撑计划课题(2012BAA12B06)

摘　　要：针对火电厂过热汽温对象的大惯性、大迟延、时变、不确定的特点,基于一阶加纯滞后模型,将一种改进的内模PID控制方案应用于火电厂过热汽温的控制,并给出了设计步骤及各参数在线计算公式。该方案结构简单,易于在DCS中组态实现。对某超临界600 MW直流锅炉过热汽温系统4种典型工况进行仿真控制表明了该方法的优越性,其过渡过程时间短,无超调,适用于大惯性、大迟延过程的控制,控制效果明显优于串级PID控制,具有较强的鲁棒性和自适应能力。Aiming at the large inertial large time-delay, time-variation and uncertainty characteristic of the main steam temperature object in power plants, based on the FOPDT model, an improved internal model PID control strategy was applied to the control of the main steam temperature and the online calculation formula of the tuning parameters was provided. The strategy is simple and easy to be configured in DCS. The proposed approach is applied to four typical operating regimes in the main temperature plant of a supercritical 600 MW boiler and the simulation results show that the advantages of the proposed approach, such as short adjustment time, without overshoot, can effectively overcome the long dead time and has robust and adaptive capacity. The control performance of this control system is apparently superior to the general cascade PID control system.

关 键 词：内模控制 过热汽温 大迟延 PID 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TP273[自动化与计算机技术—计算机科学与技术]