火电机组凝汽器蒸汽喷射真空系统控制逻辑的设计与应用  

Design and Application of Control Logic for Steam Injection Vacuum System in Thermal Power Unit

作　　者：付乐东 Fu Ledong(JXIC Energy Tech.Research Institute Co.,Ltd.,Nanchang 330096,China)

机构地区：[1]江西江投能源技术研究有限公司,南昌330096

出　　处：《发电设备》2023年第5期328-333,共6页Power Equipment

摘　　要：某火电机组凝汽器在原有的水环真空泵组的基础上加装蒸汽喷射真空系统,并且设计一套控制逻辑。基于蒸汽喷射真空系统的特点,研究确定系统控制策略的控制需求和逻辑设计方案,提出采用顺序步进程序对关键工艺逻辑进行组态,同时对系统逻辑设计进行应用验证。验证结果表明:真空系统改造后,在蒸汽喷射真空系统投入运行时的凝汽器年平均真空有所提升,减少了机组运行的热耗率,提高了机组运行的经济性,同时真空系统可用设备增加,提高了机组运行的可靠性,可以为同类型控制策略的工程应用提供参考。Considering the existing water ring vacuum pump unit in a thermal power unit condenser,a steam injection vacuum system was installed,and a set of control logic was designed for this system.Based on the characteristics of the steam injection vacuum system,the control requirements and the logic design schemes of the system control strategy were researched and determined,while the method of using the sequential step program to configure the key process logic was proposed.After which,the application of the system logic design was verified.Verification results show that after the retrofit of the vacuum system,the annual average vacuum of the condenser is improved when the steam injection vacuum system is put into operation,which can reduce the heat consumption rate and improve the economy during unit operation,while the reliability of the unit operation can be improved with the addition of the available equipment in the vacuum system.This may serve as a reference for the engineering application of similar control strategies.

关 键 词：火电机组 凝汽器 真空系统 蒸汽喷射装置 逻辑设计 顺序控制 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]