空冷机组凝结水系统蓄能容量定量分析  

Quantitative Analysis of Energy Storage Capacity of Air Cooling Units' Condensate System

作　　者：练海晴 田亮[1] 张锐锋 

机构地区：[1]华北电力大学控制与计算机工程学院,河北保定071003 [2]贵州电力试验研究院,贵州贵阳550002

出　　处：《华北电力大学学报（自然科学版）》2016年第1期71-75,共5页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)资助项目(2012CB215203);中央高校基本科研业务费专项资金资助(2014MS145)

摘　　要：合理利用凝结水系统蓄能是提高火电机组负荷响应速率的有效手段之一。在分析机组回热加热系统结构及工作机理的基础上,建立各低压加热器及除氧器的质量-能量平衡方程,根据等效焓降法分析凝结水流量同各级抽汽流量之间的关系,计算出凝结水流量变化与发电功率变化之间的静态增益;并依据除氧器容积定量计算出机组凝结水系统蓄能容量。进一步通过对比典型600 MW空冷机组和水冷机组的计算结果,发现相同负荷下空冷机组储能容量较水冷机组储能容量小20%左右;空冷及水冷机组凝结水系统蓄能容量都呈现随功率增加而增加的趋势。所涉及的计算过程及结论对我国华北、西北"富煤少水"地区空冷机组具有参考价值。Reasonable utilization of the energy storage of unit＇ s condensate system is one of the main effective methods to improve the thermal power unit＇ s load response rate. On the basis of analyzing the regenerative system structure and the working mechanism of the unit, this paper sets up the mass and energy equilibrium equations of low pressure heaters and deaerator. Then in order to calculate the static gain of condensate flow changes and the generation power changes, the relationship between the condensate flow and the heater extraction steam flow is analyzed by employing equivalent enthalpy drop method. Finally, the total energy storage capacity is worked out according to the deaerator volume. By comparing the calculation results of typical 600 MW air cooling unit and water cooling unit, it is found that under the same load, the air cooling unit energy storage capacity is about 20% smaller than the water cooling unit energy storage capacity. Both of the air and water cooling units energy storage capacity of condensate system increase with the increasing load trend. The calculation process and the conclusions involved can provide references to the air cooling units in North China and Northwestern China, which are rich in coal, but short of water.

关 键 词：空冷机组 凝结水系统 蓄能容量 负荷调节 等效焓降 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]