锅炉汽包水位前馈-串级三冲量控制系统设计  

Design of boiler steam level control system based on feedforward cascade three-impulse

作　　者：陈旭 王浩[2] 

机构地区：[1]重庆钢铁集团股份有限责任公司 [2]重庆邮电大学国家信息无障碍工程研发中心智能系统及机器人研究所

出　　处：《中国科技信息》2013年第23期143-147,共5页China Science and Technology Information

摘　　要：针对锅炉的水位调节过程难以建立精确数学模型,具有非线性、不稳定性、时滞等特点,传统的单冲量、双冲量水位控制无法满足大负载变动和存在给水中断风险。本文提出一种由汽包水位H、蒸汽流量D、给水流量W组成的三冲量汽包水位控制系统。其中汽包水位H是被调节量,蒸汽流量D和积水流量W为辅助冲量信号,共同构成的汽包水位三冲量前馈-串级控制系统。经测试不仅能够对"虚假水位"做出正确动作,同时能够对给水流量变化做出及时反应,结合PID控制器,能有效的消除余差。However, the traditional control scheme of in single or two impulses unable to meet the requirements of the Drum system which load changes always, and there is water supply disruption risk.In the paper we present a system consists of three impulses： water level named H, steam flow named D, water flow named W, combine the Feed-forward and Cascade control form the new system named ＇Drum system control with three impulses combine Feed-forward and Cascade control methods＇. It not only can solve the problem of＇False water level＂ but also can suppress the interference signal timely and effectively. If the system combines the PID controller, it can eliminate the residual error effectively.

关 键 词：汽包水位 三冲量 前馈-串级控制 PID控制器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]