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以南水北调中线总干渠为对象,研究了冬季输水过渡期局部渠段的闸前变水位运行方式及整个干渠的闸门控制算法。将闸前变水位运行方式的实现过程分解为闸前常水位运行和变水位蓄量补偿两个同步进行的过程,分别完成流量变化目标和蓄量变化目标。设计了整个干渠结构统一的闸门控制算法,不仅能够实现闸前变水位与闸前常水位运行方式间的切换,还能实现二者的联合运行。闸门控制算法由前馈控制、反馈控制和解耦三个部分组成。在总干渠全线上数值模拟了冬季输水前安阳河闸以北抬升控制水位而以南维持不变的过程。结果表明,在2d时间内,安阳河闸以北的控制水位可由设计水位抬升至加大水位,整个渠道的水力过渡过程平稳,水位波动符合安全限幅要求。
Based on the main canal of the Middle Route of South-to-North Water Diversion Project, this paper studies the operation modes of the water level before gate transition and the gate control algorithm of the whole canal in the transition section of winter water transfer. The process of realizing the water level change before the sluice is decomposed into two simultaneous processes, that is, the normal water level operation before the sluice gate and the compensation for the water level change amount. The goal of volume flow change and the target of accumulative volume change are respectively completed. The uniform gate control algorithm of the entire canal structure is designed, which not only can switch between the water level before the gate and the normal water level before the gate, but also can realize the joint operation between the two. The gate control algorithm consists of three parts: feedforward control, feedback control and decoupling. On the whole main canal, the numerical simulation of the process of raising the control water level to the north of Anyang Hezha River before the winter water conveyance and maintaining the same in the south. The results show that the control water level north of Anyang river sluice can be raised from design water level to water level within 2 days, and the hydraulic transition process of the whole channel is stable. The water level fluctuation conforms to the safety limit requirement.