火力发电厂电动给水泵节能改造方案分析  

Analysis of Energy-saving Retrofit Schemes for Electric Feedwater Pumps in Thermal Power Plants

作　　者：骆峰 LUO Feng(CHN Energy Longyuan Environmental Protection Co.,Ltd.,Beijing,100039)

机构地区：[1]国家能源集团龙源环保有限公司,北京100039

出　　处：《能源科技》2025年第2期88-92,共5页Energy Science and Technology

摘　　要：火力发电厂中,电动给水泵是最主要的耗电辅机设备,耗电量占厂用电率的30%,因此电动给水泵的节能改造对降低厂用电率具有重要意义。结合某2×200 MW火电机组电动给水泵改造案例,提出变频改造和齿轮优化改造方案。从节能效果、改造复杂程度、投资成本等方面对2种方案进行对比分析。相比较于变频改造方案,齿轮优化方案节能效果略低,年总节电率降低4%~6%,但其成本远低于变频方案,回收周期可缩短一半,并且运行的稳定性较高,综合性能较好。综上所述,推荐火力发电厂进行给水泵节能改造时优先考虑齿轮优化方案。In thermal power plants,electric feedwater pumps are the most energy-intensive auxiliary equip⁃ment,accounting for 30%of the auxiliary power consumption rate.Therefore,the energy-saving retrofit of these pumps is crucial for reducing auxiliary power consumption rate.This paper presents the variable fre⁃quency drive retrofit scheme and gear optimization scheme on the basis of a case study of the electric feed⁃water pump retrofit implemented at a 2×200 MW thermal power unit.A comprehensive comparison of the two schemes is carried out in terms of,among others,energy-saving effect,complexity of retrofit and cost of investment.The results reveal that while the gear optimization scheme achieves slightly lower energy savings(lower in annual total energy savings by 4%-6%)compared to the variable frequency drive retrofit scheme,it demonstrates far lower cost,50%shorter payback period,higher operational stability and better comprehensive performance.To sum up,the gear optimization scheme should be prioritized in energy-saving retrofit of feed⁃water pumps in thermal power plants.

关 键 词：火力发电厂 给水泵 变频改造 齿轮优化 

分 类 号：TM621[电气工程—电力系统及自动化]