基于水联网的灌区明渠多输入多输出联动控制方法与精准调控系统OA

Aiming at the problems of difficult gate cooperative control,insufficient manual scheduling accuracy and limited capacity for precise water distribution in the process of open channel water transmission and distribution in the Yellow River irrigation area,a MIMO linkage control method for open channel in irrigation area based on water internet is proposed.The hydrodynamic constraints are established by integrating the integral time-delay model and the Saint-Venant equations,and the quadratic performance index function is constructed.The KKT conditions is used to solve the optimal control action of all gates throughout the canal system,and a closed-loop rolling optimization mechanism is formed,which overcomes the bottleneck of deviation accumulation and inability to cope with multi-gate coupling under the traditional single-point response mode.The precise control system of open channel coordinated water volume in irrigation area is developed.Two parallel operational threads of monitoring analysis and dispatching control are adopted to realize the deep integration of integrated measurement-and-control gates and linkage control software and the batch issuance of instructions,so as to complete the transformation from theory to production application.The verification in the million-acre irrigation area of the West Main Canal shows that the operation deviations are rapidly corrected within the scope of a single management station,and the joint regulation and control across management stations is stable as a whole;the deviation of five of the six direct offtakes is obviously reduced after regulation,and the flow fluctuation is controlled within 0.02 m3/s.The water supply cycle was shortened from 18 days to 13 days.While the irrigation area increased by 14.5%,the annual water supply decreased by 14.7%,and the water supply per unit area decreased from 7 538 m3/hm2 to 5 610 m3/hm2,which effectively improved the accuracy of water transmission and distribution,water supply efficiency and water resources utilization level in the irrigation area,and provided technical support for the construction of digital twin irrigation area and intelligent irrigation area.