DCS中串级PID调节器的用户功能块设计及应用

User Function Block Design and Application of Cascade PID Controller in DCS

为了研究串级PID调节器在DCS中的应用,选用一种基于ABB-800F软件自定义的用户功能块作为研究对象,对该软件自带PID通用连续调节控制块(C_CU)展开PID调节器面板及程序设计,增强其功能,通过密码解锁,实现一种能够直观进行图形化界面参数整定及调试的通用PID软调节器,既可以单回路PID控制,又可以串级PID控制,且能在编程组态中像功能块FBD指令一样使用。该用户功能块串级PID软调节器在某化工甲醛生产中应用,已经取得良好的效果。

In order to study the application of cascade PID controller in DCS,a self-defined user function block based on ABB-800F software is selected as the research object,and the software comes with its own PID universal continuous adjustment control block(C_CU),expand the PID controller panel and program design,enhance its function,unlock through password.It realizes a general PID soft regulator which can adjust and debug parameters intuitively in graphical interface.It can realize single loop PID control and cascade PID control,and can be used in programming configuration like FBD instruction.This user functional block cascade PID soft regulator has achieved good results through application in the production of formaldehyde in a chemical industry,and has the value of reference and promotion.