基于汽水分布方程的热力发电机组凝结水节流静态负荷响应特性

Study on Static Load Response of Thermal Power Units Caused by Condensate Throttling Based on Steam-Water Distribution Equation

以火电机组热力系统汽水分布通用矩阵方程为基础,对机组负荷变化量与凝结水质量流量变化量之间的关系进行了探讨,建立了二者之间的函数关系式,达到了通过调节凝结水质量流量变化量来满足负荷需求的目的.以大唐盘山电厂600 MW机组为例,对上述函数关系式进行了分析与验证.结果表明:在工况确定时,利用所得函数关系式,改变一定量的凝结水质量流量,可以达到改变确定负荷量的目的;在不同工况下,负荷越大,采用凝结水节流这一方法所得到的效果越好.

Based on the steam-water distribution general matrix equation of thermal power systems,the relationship between variation of unit load and condensate flow was studied,and subsequently a functional relationship was established between above two variables,with which the goal can be achieved to meet the load demand by adjusting the condensate flow.Taking the 600 MW unit in Datang Panshan Power Plant as an example,the functional relationship was analyzed and verified.Results show that with the functional relationship,the load capacity can be regulated by changing a certain amount of condensate flow under fixed working conditions;whereas under different working conditions,the higher the unit load is,the better effectiveness of load adjustment will be obtained by adopting the condensate throttling method.