660 MW机组给水泵汽轮机出力不足问题分析及解决  

Analysis and Solution of Insufficient Output of Feed Water Pump Small Steam Turbine of 660 MW Units

作　　者：金仁赛 薛建军 金利鹏 顾伟飞 JIN Ren-sai;XUE Jian-jun;JIN Li-peng;GU Wei-fei(Zhejiang Zheneng Wenzhou Power Co.,Ltd.,Wenzhou 325602,China;Zhejiang Provincial Key Laboratory of Energy Conservation&Pollutant Control Technology for Thermal Power,Hangzhou 311121,China;Zhejiang Energy Group R&D Co.,Ltd.,Hangzhou 311121,China)

机构地区：[1]浙江浙能温州发电有限公司,浙江温州325602 [2]浙江省火力发电高效节能与污染物控制技术研究重点实验室,浙江杭州311121 [3]浙江浙能技术研究院有限公司,浙江杭州311121

出　　处：《节能技术》2024年第5期430-433,443,共5页Energy Conservation Technology

摘　　要：某660 MW机组高负荷工况下存在加负荷能力不足的问题,严重影响了机组的AGC性能。综合现场运行条件及影响因素进行分析发现,是由于给水泵小汽轮机流量计的节流作用会直接影响到蒸汽管道内流场特性,导致给水泵汽轮机进口压力低、出力不足,进而引发的该问题,并给出了用A+K平衡流量计替代现有流量计的问题解决方法。实验结果表明:相对于现有流量计的边缘节流方式,A+K平衡流量计的平衡节流方式可实现对蒸汽管道内的流场优化,有效减少蒸汽管路因测量而产生的压降,不仅可以提高机组高负荷工况下的加载能力,而且还具有良好的经济性。这对改善大功率调峰调频机组给水泵轮机出力性能具有重要的工程参考价值。There is a problem of insufficient load capacity under high load conditions of a 660 MW unit,which seriously affects the AGC performance of the unit.Based on the analysis of on-site operating conditions and influencing factors,it is found that the throttling effect of the small turbine flowmeter of the feedwater pump will directly affect the flow field characteristics in the steam pipeline,resulting in low inlet pressure and insufficient output of the feedwater pump turbine,which leads to this problem.The solution to the problem of replacing the existing flowmeter with A+K balanced flowmeter is given.The experimental results show that compared with the edge throttling method of the existing flowmeter,the balanced throttling method of the A+K balanced flowmeter can optimize the flow field in the steam pipeline and effectively reduce the pressure drop caused by the measurement of the steam pipeline.It can not only improve the loading capacity of the unit under high load conditions,but also has good economy.This has important engineering reference value for improving the output performance of feed water pump turbine of high power peak and frequency modulation unit.

关 键 词：660 MW机组 给水泵汽轮机 出力不足 平衡流量计 

分 类 号：TH133[机械工程—机械制造及自动化] TP183[自动化与计算机技术—控制理论与控制工程]