摘要
对渠道水位反馈控制系统的控制过程进行了分析,阐明了该系统存在的两方面问题,即对上游扰动的反馈校正存在滞后和上游渠池的控制会影响下游各渠池.提出通过增设流量控制环节,构成水位-流量串级控制系统的方式解决上述问题.以闸前常水位运行渠道为例,设计了水位-流量串级控制器,对其传递函数进行了分析,给出了串级反馈控制器的设计准则.以5渠池渠道为算例,分别设计了水位反馈控制器和水位-流量串级控制器,进行数值仿真比较研究.结果表明采用水位-流量串级反馈控制后,来自上游渠池的扰动能够更快地被校正,上游渠池运行对下游的影响能被有效隔离,闸门的操作量减少,控制效果改善明显.
Based on the analysis of feedback control of water level on canal system, two problems are expounded, i.e. time delay of feedback control and influence from operation of upstream pools. A flow controller is suggested to incorporate into the feedback control system to solve problems mentioned above. Applying the cascade control theory of process control system, a water level and flow cascade feedback control system is designed for canal, which is under constant downstream depth operation as an example. Its character is analyzed in the form of transfer function. Some suggestions are given on the application of the controller. A 5-pool simulation canal is presented and two different controllers, cascade controller and feedback controller are designed and tested for comparison. Simulation results show that cascade control can correct the disturbance from upstream pools more quickly and isolate upstream pools influence effectively. The operation of gates is reduced; and the control performance is evidently improved.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2009年第6期764-768,共5页
Engineering Journal of Wuhan University
基金
"十一五"国家科技支撑计划资助项目(编号:2006BAB04A12)
中国水利水电科学研究院优秀青年科研专项项目(编号:QN0708)
关键词
调水工程
闸前常水位运行
反馈控制
串级控制
water transfer project
constant downstream depth operation
feedback control
cascade control
