摘要
在对国电成都热电厂嘉陵2×142MW机组两炉一机单元给水系统控制方式进行分析的基础上,针对运行中出现的汽动给水泵不能直接调节单台锅炉汽包水位及给水母管压力超限等问题,利用分散控制系统(DCS)信息共享、组态功能强大、修改方便的特点,在不增加硬件设备的情况下,通过软件组态增加了汽动给水泵调节单台锅炉汽包水位调节回路和给水母管超压及欠压保护回路,实现了机组在一炉一机单元运行和两炉一机母管运行2种运行方式下给水自动的合理控制,并解决了给水母管的压力保护问题,提高了机组运行的安全可靠性。
The feedwater flow control system of 2×142 MW units (each consists of two boilers and one turbine) in Chengdu Cogeneration Power Plant is introduced. Since the turbine-driven feedwater pump failed to regulate directly the drum level of single boiler and problems like pressure overrun of main feedwater pipe existed, DCS was utilized to solve the problems for its features of shared information, powerful configuration functions and easy modification. Without adding hardware, a control loop for drum level regulation of single boiler by turbine-driven feedwater pump and a control loop for main feedwater pipe over and under pressure protection were added through software configuration, which realized automatic feedwater flow control under two operation modes of one boiler to one turbine and two boilers to one turbine while settling the pressure protection of main feedwater pipe and raising the security and reliability of the units.
出处
《中国电力》
CSCD
北大核心
2005年第5期81-84,共4页
Electric Power
关键词
给水自动控制
汽动给水泵
给水母管
汽包水位
feedwater flow control
turbine-driven feedwater pump
main feedwater pipe
drum level
