双交叉限幅控制在燃烧条件不稳定时的优化应用  

Application of double-cross-limit controlling optimization in the combustion instability condition

作　　者：杨永茂[1] 郑江涛[1] 王超[1] 王夏书[1] 王云峰[1] 杨钊 YANG Yong-mao;ZHENG Jiang-tao;WANG Chao;WANG Xia-shu;WANG Yun-feng;YANG Zhao(Electricity ＆ Automation Design Division, Beijing Shougang International Engineering Technology Co., Ltd., Beijing 100043, China)

机构地区：[1]北京首钢国际工程技术有限公司电气事业部

出　　处：《冶金自动化》2018年第3期46-49,共4页Metallurgical Industry Automation

摘　　要：阐述了宣钢一高线加热炉燃烧控制系统的优化方法。针对该燃烧系统燃气热值不稳定、流量元件检测不准、阀门流量特性偏失的特点,对现有的双交叉限幅中每个控制环节（温度PID、燃气流量PID、流量限制、优选系数）进行分析,采用设置PID死区、温度流量控制方向一致性检查、流量与阀门输出限制、温度前馈、系数分段设置等优化手段。通过大量的现场试验与验证,最终实现较为稳定的燃烧控制,解决了业主之忧。The optimization method for combustion control system of Xuansteel high speed wire heating furnace is described. To solve the problems of unstable gas calorific value,inaccurate gas flow measurement and deviant valves flow,every control unit in the original double-cross-limit controlling is analyzed and optimized by setting the PID dead zone,checking the consistency of temperature/flow control direction,limiting the output for flow and valve,feeding forward the temperature and dividing the coefficients into segments. After a large number of engineering practices,the stable combustion control is finally implemented,which solves the problem in the objective.

关 键 词：加热炉 双交叉限幅控制 优化方法 串级控制 前馈 分段控制 

分 类 号：TG307[金属学及工艺—金属压力加工] TP273[自动化与计算机技术—检测技术与自动化装置]