1000MW火电机组给水回热系统故障分析及处理  

Analysis and Treatment on Fault of Regenerative Feed-water Heating System in a 1000 MW Thermal Power Unit

作　　者：胡正荣 罗曙炎 王日成 余兴刚 Hu Zhengrong;Luo Shuyan;Wang Richeng;Yu Xinggang(Hunan Huadian Pingjiang Power Generation Co.,Ltd.Yueyang 414512,Hunan Province,China;State Grid Hunan Electric Power Company Limited Research Institute,Changsha 410031,China;Hunan Xiangdian Test&Research Institute Co.,Ltd.,Changsha 410004,China)

机构地区：[1]湖南华电平江发电有限公司,湖南岳阳414512 [2]国网湖南省电力有限公司电力科学研究院,长沙410031 [3]湖南省湘电试验研究院有限公司,长沙410004

出　　处：《发电设备》2024年第5期318-322,共5页Power Equipment

摘　　要：某新建1000 MW超超临界火电机组调试期间给水回热系统发生了最终给水温度异常偏低、蒸汽冷却器出口给水温度超限、低压加热器液位波动的问题,从测点测量因素、运行控制参数、系统结构布置等多个方面展开分析,通过分析准确找出了故障的原因,针对不同故障提出了对应的解决措施和建议。处理取得了良好的效果,及时消除了设备损坏的风险并提高了热力系统经济性,可以为同类型机组给水回热系统的故障处理与运行优化提供参考。For a newly built 1000 MW ultra-supercritical thermal power unit,to solve following three problems in regenerative feed-water heating system during commissioning,namely the final feed-water with abnormally low temperature,the outlet feed-water of steam cooler with excessive temperature,and the liquid level of low pressure heater with fluctuation,analyses were carried out from the aspects of measurement factors,operation control parameters and system structure layouts.The reasons of faults were accurately found through analysis,while corresponding measures and suggestions were proposed for different faults.A good effect is obtained after treatment,which can eliminate the risk of equipment damage in time and improve the economy of the thermal system.This may provide a reference for the fault handling and operation optimization of the regenerative feed-water heating system in similar units.

关 键 词：火电机组 给水回热系统 故障处理 运行优化 

分 类 号：TM621.27[电气工程—电力系统及自动化]