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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.
The control process of channel water level feedback control system is analyzed, and two aspects of the system are clarified, that is, the feedback correction of upstream disturbance lags behind and the control of upstream channel pool will affect the downstream channel banks. Link, form a water level - flow cascade control system to solve the above problems.Taking the normal water level before the brake channel as an example, the design of the water level - flow cascade controller, the transfer function was analyzed, given the cascade feedback Controller design criteria.With 5-channel channel as an example, the water level feedback controller and the water level-flow cascade controller are respectively designed and compared by numerical simulation.The results show that after the water level-flow cascade feedback control, The disturbances of the upstream channel can be corrected more quickly, and the influence of the upstream channel can be effectively isolated from the downstream. The operation volume of the gate is reduced and the control effect is obviously improved.