摘要
某电厂2×300 MW机组均配置2台100%容量凝结水泵,采用“一运行,一备用”模式。经过数据分析,发现该配置存在电耗偏高以及除氧器水位调节阀节流损失的问题。为有效解决这些问题,本文提出了对凝结水泵进行变频调速技术改造的方案,改造完成后凝结水泵可选择变频或工频2种运行方式。在凝结水泵以变频模式运行时,为了最小化阀门节流损失,尽可能将除氧器水位调节阀及其旁路阀全开,并投入凝结水泵频率自动调节除氧器水位。而在凝结水泵工频运行时,可投入除氧器水位调阀自动调节除氧器水位。若无泵变频器故障等特殊情况时,凝结水泵应选择变频运行。经过实践验证,采用变频控制技术的凝结水泵不仅具有显著的经济效益,还在技术性能方面展现了卓越的品质。
A power plant’s two 300 MW units are each equipped with two 100%capacity condensate pumps operating in a“one active,one standby”configuration.Data analysis revealed excessive energy consumption and throttling losses in the deaerator water level control valves.To address these issues,this study proposes a variable frequency drive(VFD)retrofit for condensate pumps.The upgraded system enables two operational modes:VFD or standard frequency.During VFD operation,the deaerator valve and bypass valve are fully opened to minimize throttling losses,while VFD-driven condensate pumps automatically regulate deaerator levels.Standard frequency operation activates automatic deaerator level control via the valve.Unless encountering pump inverter failures or other special circumstances,VFD operation is recommended.Practical verification demonstrates that VFD-controlled condensate pumps not only deliver significant economic benefits but also exhibit superior technical performance.
作者
田玉芹
TIAN Yuqin(Yunnan Huadian Kunming Power Generation Co.,Ltd.,Anning 650308,Yunnan,China)
出处
《流体测量与控制》
2025年第6期23-26,共4页
Fluid Measurement & Control
关键词
凝结水泵
变频改造
逻辑优化
变频器
condensate pump
frequency conversion retrofit
logic optimization
frequency converter
