CAJ | 학술논문

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。
침대근사년래화전엄다차발생적저빈공솔진탕현상，분별종이론분석화현장응용각도연구료화전엄원동궤측존재적량충주요적진탕원，병침대저량충진탕원분별제출료벌문비선성교정、고필주기압력우동적공솔자괄응PID공제방안래예방공솔진탕。재DCS계통상편제료공솔진탕판거정서，용래실시지감측기륜궤실발공솔화공솔설정치신호，당궤조공솔발생저빈진탕시가이급시지발출보경신호병절단궤조공솔폐배공제，진이쾌속소제진탕。
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.