基于PLC的锅炉加药自动控制系统  

Auto-control system of chemical sadding for boiler based on PLC

作　　者：武军[1] 

机构地区：[1]西安铁路职业技术学院,陕西西安710014

出　　处：《国外电子元器件》2008年第12期22-23,26,共3页International Electronic Elements

摘　　要：针对各电厂给水加药大多采用人工调节,难以实现全自动化管理的情况,提出一种采用变增益三区段非线性PID、积分模糊控制(IFC)算法及上位机软件WinCC+S7-200 PLC的组合方案,通过ProfiBus通讯方式,将其与在线pH仪、联胺表、电导率仪和液位传感器相结合构成的二级监控系统,实现了锅炉给水配药、加药全自动控制过程。该系统具有鲁棒性强,响应速度快和控制精度高的特点,尤其能克服pH值中和过程的较大时滞。Aiming at realizing the automated management with difficulty,using the manual regulation in view of various power plants to drug adding,an auto-control system of chemical adding for boiler based on PLC is propesed.The system uses gain three-sector misalignment PID,the integral fuzzy control （IFC） algorithm,and superior machine software WinCC＋S7- 200 PLC combination plan.Through the ProfiBus communication way,the online pH meter,hydrazine table, conductivity meter and the fluid position sensor are composing of the second-level monitor system.The system features robustness to be strong, the speed of response is quick and high control precision, and the system can overcome the pH value neutral process especially the big time lag.

关 键 词：控制器 变频器 自动控制/锅炉加药 可编程控制器 加药系统 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]