超(超超)临界机组主汽温控制系统控制传递策略研究与应用  

Research and application of control transferring strategies for main steam temperature control in(ultra)supercritical units

作　　者：尹峰[1] 

机构地区：[1]浙江省电力试验研究院,杭州310014

出　　处：《华东电力》2009年第4期644-647,共4页East China Electric Power

摘　　要：超(超超)临界直流机组的主汽温控制特点是在锅炉失去确定汽水分界的情况下,将控制对象扩展到了从水冷壁至末级过热器的整个热量利用流程上,作为整体进行汽温的控制与平衡;通过燃水控制参与,实现主汽温与分离器入(出)口过热度(焓)间控制需求的有序传递,在动态中保持给水与减温水的合理分配;目前超(超超)临界机组引进的各类典型控制技术,在主汽温与燃水控制策略方面存在较大的差异,主要的控制传递策略有逆向串联传递策略、正向循环传递策略及其局部变化形式等。通过对不同类型超(超超)临界机组汽温控制传递与燃水控制策略的研究与应用,分析主要特点并提出完善措施,在实际应用中收到了较好的效果。In ultra-supercritical units, the control object of the main steam temperature control system is expanded to the whole heat utilization process, i.e. from the water wall to the final superheater, and the steam temperature of every part is controlled and balanced as a whole. The control requirement is transferred between the main steam temperature and the steam separator inlet （ outlet ） overheat ratio （ enthalpy ） with the participation of fuel and feed water control and a stable distribution of feed water and spray water. Different control transferring strategies were used in the uhra-supercritical units, including the backward sequential transferring strategy, forward circular transferring strategy and their partial transforms. The successful application and improvement measures were recommended.

关 键 词：超(超超)临界机组 主汽温 过热度 控制传递 控制策略 

分 类 号：TK323[动力工程及工程热物理—热能工程]