Smith预估器在过热气温控制中的应用

Application of Smith Controller in Superheater Steam Temperature Control

针对过程控制滞后的问题,介绍Smith预估器的控制原理和应用,把一种改进的Smith预估控制器应用于发电厂过热气温控制。并利用ITAE优化准则给出了改进Smith预估控制器的参数整定方法。以达拉特发电厂#4机组过热汽温控制为例探讨Smith预估器对过热汽温控制时参数的整定方法,并对实施后的效果与常规PID控制效果进行比较和总结。

To the time-delay control process,the principle of Smith predictor is introduced and analyzed.The new structure of a modified Smith predictor is given particularly.Based on the ITAE criteria,the tuning method of the modified Smith controller＇s parameters are introduced.Combine with Dalate Power plant #4 unit superheater steam temperature control to inquiry into test method of parameter of Smith controller controlling superheater steam temperature,and carried on comparison and tally up on effect after implementation and normal PID control effect.