增量式函数观测器在W形火焰直流锅炉汽温控制中的应用  

Application of increment function observer in steam temperature control of Wshape flame once-through boiler

作　　者：兰立刚[1] 郭同书[2] 马睿[1] 刘明礼[1] 朱能飞[2] 

机构地区：[1]四川省电力工业调整试验所,四川成都610072 [2]国电南京自动化股份有限公司,江苏南京210031

出　　处：《华电技术》2012年第2期65-67,80,共3页HUADIAN TECHNOLOGY

摘　　要：针对W形火焰超临界直流锅炉过热蒸汽温度与煤水比控制耦合性强、炉膛温度过高易结焦、过热汽温控制对象迟延时间和惯性时间长等特点,在华电四川珙县电厂2×600 MW机组过热汽温串级PID控制系统中加入增量式函数观测器状态反馈控制。实际调试及应用表明,过热汽温动态特性明显改善,变工况时过热汽温偏差控制在允许范围之内。方案具有较强的实用性,为超临界机组的控制提供了参考和借鉴。The control of the W-shape flame supercritical once-through boiler has some features,which include that the overheated steam temperature control and the coal-water ratio control are strong coupled,the furnace temperature is too high and leads severe coking,the control object of the overheated steam temperature has larger lag and longer inertia time and others.Aiming at above features,the increment function observer and state feedback control were added into the overheated steam temperature cascade PID control system of the 2×600 MW unit in GongXian power plant.The practical commissioning and application show that the dynamic characteristics of the overheated steam temperature were significantly improved;and in the process of condition changing,the deviation of overheated steam temperature was controlled within the allowed range.The design scheme has better practical applicability and provides certain reference for supercritical units in steam temperature control.

关 键 词：W形火焰 超临界直流锅炉 过热汽温 增量式函数观测器 状态反馈 

分 类 号：TK229.54[动力工程及工程热物理—动力机械及工程]