基于弹性回热技术的调频性能研究

Research of Properties of Frequency Regulation based on the Flexible Extraction Technology

介绍了一种基于弹性回热技术的新型调频理论,即通过调节回热抽汽量来改变机组功率。燃煤火电机组采用弹性回热技术进行调频时:可调回热抽汽的参数较高,增强了负荷响应性;主汽调门在整个滑压运行区域中常开,节流损失降到了最低,给水温度发生波动,经过利用省煤器的蓄热使得其出口水温基本稳定。

This paper introduces a new theory of frequency regulation,which is based on the Flexible Extraction Technology,where unit power changes after regulating the regenerating extraction. Due to the high parameters of the adjustable extraction steam,load responsiveness will be enhanced when the Flexible Extraction Technology is used for frequency regulation of coal-fired power units. In addition,throttle loss will reduce to a minimum as a result of the full open state of the main throttle valve in the whole region of sliding pressure operation. The economy of frequency regulation will turn out to be remarkably promoted. What's more,the temperature fluctuation of the Feed Water will occur.However,the outlet water temperature of the economizer will remain basically stable through utilizing the tremendous thermal energy storage of the economizer. The safety of frequency regulation will be significantly improved in this way.