超临界机组锅炉给水控制系统的分析和优化  

Analysis and Optimization of Boiler Water-supply Control System in Supercritical Units

作　　者：葛朋 靖东平 GE Peng;JING Dongping(Shuangliao Power-generation Co.,Ltd,National Energy Group,Shuangliao,Jilin,136400)

机构地区：[1]国家能源集团双辽发电有限公司

出　　处：《神华科技》2019年第3期48-52,59,共6页Shenhua Science and Technology

摘　　要：超临界火力发电机组运行过程中各个参数的变化相对于负荷指令存在一定延迟,燃料、给水变化时呈现不同的时间特性,对水煤比和汽温控制影响较大,在控制逻辑中需对参数进行调整。在辅助调峰时段,机组负荷在额定负荷的50%以下,系统的稳裕度进一步下降,需要对参数和机组运行方式进行进一步调整。本文旨在对直流锅炉给水控制系统存在的问题进行分析,提出解决的方法,提高给水系统的稳定性。The change of each parameter in the operation process of supercritical thermal power generating unit has a certain delay with respect to the load command. The fuel and feed water have different time char. acteristics when they change,which has great influence on the water-coal ratio and steam temperature con. trol. The parameters need to be adjusted in the control logic. During the auxiliary peaking period,the unit load is below 50% of the rated load,and the stability of the system is further reduced,further adjustments to the parameters and unit operation mode are required. This paper aims to analyze the problems existing in the water-supply control system of concurrent boiler,propose solutions and improve the stability of the watersupply system.

关 键 词：给水控制系统 控制逻辑 振荡 稳定性 

分 类 号：TK22[动力工程及工程热物理—动力机械及工程]