600 MW机组电动给水泵变频改造及经济性分析  

Frequency Conversion Renovation of Electric Feedwater Pump of 600 MW Unit and the Economic Efficiency Analysis

作　　者：周正道 包伟伟 秦英武 高德民 宁辉 ZHOU Zhengdao;BAO Weiwei;QIN Yingwu;GAO Demin;NING Hui(State Power Investment Corporation Limited,Beijing 100033,China;SPIC Central Research Institute,Beijing 102209,China;SPIC Huolinhe Power Station,Huolin Gol Inner Mongolia 029200,China)

机构地区：[1]国家电力投资集团有限公司,北京100033 [2]国家电投集团中央研究院,北京102209 [3]国家电投集团内蒙古公司霍林河坑口发电公司,霍林郭勒内蒙古029200

出　　处：《浙江电力》2020年第6期63-67,共5页Zhejiang Electric Power

摘　　要：电动给水泵是燃煤发电机组的主要辅机设备,采用液力耦合器调速技术的电动给水泵组节能空间较大。以国内首台600 MW亚临界直接空冷机组电动给水泵组的变频改造为例,论述机组的运行现状及变频改造情况,对改造前后的经济性进行全面分析比较,结果表明:变频改造后,电动给水泵组的效率平均提高约13个百分点,机组加权厂用电率下降0.79个百分点,经济效益显著。Electric feedwater pump is a key auxiliary device of coal-fired generating units,and there is much energy-saving room for electric feedwater pumps with hydrokinetic coupling techniques.Based on the frequency conversion renovation of electric feedwater pumps of the first 600 MW subcritical direct air cooling units in China,the paper elaborates on the units operation status and frequency conversion renovation and compares the economic efficiencies before and after the renovation.The result shows that after the renovation the efficiency of the electric feedwater increases by 13%on average and the weighting auxiliary power consumption rate decreases by 0.79%,bringing about significant economic benefit.

关 键 词：600 MW机组 电动给水泵 高压大功率变频器 液力耦合器 经济性 

分 类 号：TK223.52[动力工程及工程热物理—动力机械及工程]