Valve closing optimal control method of transition process of long distance and mass flow water conveyance system

A technology of water delivery system and transition process, which is applied in the field of valve closing optimization control in the transition process of long-distance and large-flow water delivery system to achieve the effect of satisfying safe operation.

Active Publication Date: 2017-06-13
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0003] The purpose of the present invention is to provide a valve closing optimization control method for the transition

Method used

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  • Valve closing optimal control method of transition process of long distance and mass flow water conveyance system
  • Valve closing optimal control method of transition process of long distance and mass flow water conveyance system
  • Valve closing optimal control method of transition process of long distance and mass flow water conveyance system

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Embodiment

[0059]The water delivery project in this embodiment is a part of the Miyun Reservoir regulation and storage project. The total length of the water delivery pipeline is about 21.5km, and a single row of DN2600PCCP+ steel pipe pipeline is used for water delivery. There are two pumping stations along the way, the design scale is 86.4×104m 3 / d, the design head of Yanqi pumping station is 56.2m, the design water level of the inlet tank is 60.15m, the design water level of the outlet tank is 92.5m, and the flow rate of the single pump is 5m 3 / s, matching power 4000KW, rated speed 495r / min. The valve closing optimization control method for the transition process of the long-distance large-flow water delivery system described in this embodiment is specifically:

[0060] Step 1: Establish a simulation model for the hydraulic transition process of a long-distance large-flow water transmission project

[0061] The basic differential equation of water hammer is the basis for studying ...

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Abstract

The invention discloses a valve closing optimal control method of a transition process of a long distance and mass flow water conveyance system, and relates to the field of pressure pipeline hydraulics simulations. The method comprises the steps that a long distance and mass flow water conveyance engineering hydraulic transition process simulation model is established; on the basis of the pumping station water hammer two stage valve closing, a trial algorithm is adopted to seek feasible region intervals on a first segment valve closing from the closing times and angular variations; according to the obtained feasible region interval, an optimization interval search method is adopted in the feasible region interval to conduct the step-by-step search, an optimal feasible region floating within the design range is obtained, the calculation is terminated, and the optimization control on the valve closing of the transition process of the long distance and mass flow water conveyance system is completed. According to the valve closing optimal control method, the optimal feasible region of the valve closing is achieved, both the pump station unit and the safe operations of the pipeline are satisfied, meanwhile the occurrence of the cutoff and the bridge water hammer is reduced or prevented.

Description

technical field [0001] The invention relates to the field of hydraulic simulation of pressurized pipelines, in particular to a valve closing optimization control method in the transition process of a long-distance large-flow water delivery system. Background technique [0002] Water hammer problems exist in long-distance large-flow water transmission projects, especially those with large topographical fluctuations. The current two-stage valve closing method used in some projects cannot achieve precise control of valves, and the scheduling is not flexible, resulting in pipelines and pumps. There are potential safety hazards in the station, which can easily cause water hammer accidents and cause waste of resources. Contents of the invention [0003] The object of the present invention is to provide a valve closing optimization control method for the transition process of a long-distance large-flow water delivery system, thereby solving the aforementioned problems in the prio...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 雷晓辉孙嘉斌田雨王超尚毅梓廖卫红杨明祥权锦王旭
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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