汽包水位三冲量控制方案的应用探讨  

Discussion on Application of Three Impulse Control Scheme of Steam Drum Level

作　　者：李自皋 李培瑶 Li Zigao;Li Peiyao(Refining&Chemical Plant of Yumen Oilfied Company,Yumen 735100,China;Fujian Fuhaichuang Petrochemicals Co.,Ltd.,Zhangzhou,363000,China)

机构地区：[1]玉门油田公司炼油化工总厂,甘肃玉门735100 [2]福海创石油化工有限公司,福建漳州363000

出　　处：《石油化工自动化》2019年第6期42-46,共5页Automation in Petro-chemical Industry

摘　　要：分析了汽包水位在蒸汽蒸发量、炉膛热负荷及给水量扰动时水位对象的动态特性,针对“虚假水位”产生的原因,讨论了克服汽包“虚假水位”的单冲量、双冲量和三冲量自动控制设计方案的不足。重点对三冲量控制方案的4种类型的结构形式、组成、加法器公式及公式的系数、正负号确定、特性及工程应用等方面进行了分析探讨。Dynamic characteristics of steam drum level is analyzed when the disturbance of steam evaporation,furnace heat load,and make-up water occurred.Aiming at the cause of the false water level,the defect of the design scheme of single impulse,double impulse and three impulse automatic control is discussed to overcome false water level.the structure,composition,adder formula and the coefficient,determination of plus or minus,characteristic and engineering application of the formula for four types of three impulse control scheme are analyzed and discussed stressfully.

关 键 词：汽包水位 三冲量 加法器 前馈 串级 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]