Study On Fuzzy Optimization Of Emergency Operation Strategy For The Middle Route Of South To North Water Transfer

The South-to-North Water Diversion Project,as a strategic project to alleviate the water crisis in the north of China,affects hundreds of millions of people 's water supply and water problems,to a certain extent,alleviates the serious shortage of water resources in the north of China.To good effect,it has received extensive attention from the project proposal to the put into use.The South-to-North Water Diversion Middle Line project has a long water delivery line,complex operating conditions,a large variety of buildings,extremely significant non-linear flow,precise control is difficult,a large amount of water is transferred,and there is no online regulating reservoir.Therefore,after an emergency,Development and development are particularly necessary.This article starts with engineering emergencies,selects two types of emergency accidents to formulate emergency dispatching strategy plans,and scientifically optimizes emergency dispatching plans.The main research results are as follows:(1)Based on the existing hydraulic model,combined with the actual situation of the project and research needs,perform hydraulic simulations on the two types of assumed emergency accidents,and analyze the impact of such accidents on project operation and channel water level.(2)Taking the Beijing-Shijiazhuang section of the Middle Route of South-toNorth Water Transfer Project as an example,it is assumed that there are two types of emergency accidents: power failure at the terminal pump station and control gate failure.Different emergency dispatching strategies are formulated for different accidents to alleviate engineering hazards and water level pressure.Simulate the water level operation law of different emergency dispatching strategy scheme channels,and analyze the impact on water level operation and the degree of solution to emergency accidents according to the combination of different water control methods and water withdrawal methods.(3)Based on the analytic hierarchy process and fuzzy optimization,compare and select the emergency dispatching strategy plan.Developed an emergency dispatch strategy plan decision index system consisting of 10 indicators for a terminal pumping station power failure accident,and formulated an emergency dispatch strategy plan decision index system composed of 9 indicators for the control of gate fault accidents.The analytic hierarchy process was used to analyze each index system.The weights are determined and the optimal emergency dispatch strategy plan is obtained through fuzzy optimization,which plays a key role in mitigating the impact of the accident.(4)Under normal operating conditions,the power failure of the terminal pumping station can be appropriately adjusted by controlling the control gate,opening the full flow of the side valve,and the half-opening early-stage backwater sluice,which can better alleviate the pressure of the water level;Terminal pump station failure accidents can be opened by increasing the water withdrawal mode,and the water level control with the control gate can better control the water level;under normal operating conditions,the control gate failure accident can use the control gate to control the water level,which can better widen the project emergency.Time scale of processing,weakening the damage caused by the accident due to the accident.The results of this research can provide decision-making basis for such emergency accidents in the Middle Route Project of South-to-North Water Diversion,and can also provide a reference for the design of emergency dispatching strategies for similar types of long-line open channel water supply.Provide ideas.