摘要
主蒸汽温度、压力的变化会导致功率控制回路的被控对象增益发生变化,固定参数PID控制器无法适应这种变化,控制品质会变差,甚至可能导致机组出力发生波动,进而引起电网的振荡。本文采用了引入自适应因子的前馈校正,能够消除主蒸汽参数变化对机组功率的影响,保证机组出力稳定。
The change of main steam temperature and main stean pressure makes the controlled object of the power control circuit change. Fixed gain PID cannot adapt the change, the control quality will become bad, and the output of the unit may also fluctu- ates, may cause low frequency oscillation in power system. The article uses a forward feedback correction of introducing an adaptive factor. It can eliminate the influence of the change of main steam parameters to the output, ensure the stable output of the unit.
出处
《云南电力技术》
2013年第6期67-70,共4页
Yunnan Electric Power
关键词
火电机组
主蒸汽参数
功率波动
前馈校正
thermal power unit
main steam parameters
power fluctuation
forward feedback correction
