摘要
将 PID自动整定和阶梯式广义预测控制 (GPC)同时运用到大型工业锅炉的重要控制回路(如汽包水位和主蒸汽压力 )中。使用 PID自整定可以在任何时候快速、有效地修改 PID参数 ;而阶梯式 GPC的应用则突破了以往 GPC等方案只用于小型锅炉的控制、大型锅炉仅进行仿真或仅对过热蒸汽温度等回路进行控制的状况。针对在线计算的快速性要求 ,对 GPC进行修改 ,得到阶梯式GPC方法 ,使计算量比 GPC的递推算法大为减少 ,使之满足实际应用的要求。 2种方法均在某42 0
PID auto- tuning and cascade generalized predictive control GPC are simultaneously used to control the im portant control loops such as drum water level,m ain steam pressure,etc. in large power- plant boilers.By using auto- tuning,the PID parameters can always be modified quickly and effectively,while GPCs,which were used only in small boilers or to simulate or control the reheated steam temperature in large boilers,are now applied to large ones.Facing the requirem ents of high speed of on- line com putations,the conventional GPC is modified thus the cascade GPC is obtained.The com putational overhead of such a GPC is much less than which of the recursive algorithm of conventional GPC.Both the PID auto- tuning method and the cascade GPC m ethod have very good control results in their application to a42 0 t/h power- plant boiler.
出处
《电力系统自动化》
EI
CSCD
北大核心
2000年第18期45-48,共4页
Automation of Electric Power Systems
关键词
PID自动整定
阶梯式GPC
大型电站
锅炉
generalized predictive control (GPS)
PID auto- tuning
cascade GPC
correlative coefficient identification approach
