摘要
阐述了国产３００ＭＷ机组的锅炉给水全程控制系统。该系统低负荷时通过改变旁路调节阀的开度调节给水量，用单冲量系统控制汽包水位；高负荷时通过改变给水泵转速改变给水量，用三冲量系统控制汽包水位。各系统之间、泵与阔之间能无扰切换；汽包水位，蒸汽流量和给水流量的测量信号，均加入了合理的补偿校正线路及变送器冗余设置。
The water feed whole-course control system used in China-bult 300MW unit is described. It utilizes bypass valves to regulate the water level of drum in lower load. At the high load condition, change the rotating speed of steam or electricity feed water pumps to ensure the water level of the drum. Non-disturbance switching can be realized between feed-water valves, steam and electricity driven pumps, that not only meet the requirments of the whole-course control of the unit, but also ensure the satisfactory regulating performance and operating economics.
关键词
给水全程控制
转速控制
锅炉
发电机组
feed water
whole-course control systems
boiler-turbine unit
rotating speed control
