摘要
针对近些年来火电厂多次发生的低频功率振荡现象,分别从理论分析和现场应用角度研究了火电厂原动机侧存在的两种主要的振荡源,并针对这两种振荡源分别提出了阀门非线性校正、考虑主汽压力扰动的功率自适应PID控制方案来预防功率振荡。在DCS系统上编制了功率振荡判据程序,用来实时地监测汽轮机实发功率和功率设定值信号,当机组功率发生低频振荡时可以及时地发出报警信号并切断机组功率闭环控制,进而快速消除振荡。
In that case low-frequency power oscillation in thermal power units,this article discusses several oscil-lation sources existing in engine side from theoretical analysis and application field. According to the two kinds of oscillation sources,corresponding methods including valve nonlinear correction and main steam pressure adaptive control are proposed. In order to prevent and remove oscillation,this paper words out programs on the DCS system, which is used to monitor the power and power set point. When the unit power is in low frequency oscillation,the program can send out alarm signals in time and cut off the power control loop to eliminate oscillation quickly.
出处
《电力科学与工程》
2014年第1期20-25,共6页
Electric Power Science and Engineering
关键词
阀门非线性校正
主汽压力自适应控制
功率振荡判据
低频振荡
valve nonlinear correction
main steam pressure adaptive control
oscillation programs
low frequency oscillation
