Emergency regulation and control method for water return gate in accident section of open channel water conveyance project

An emergency control and sluice technology, which is applied in the field of water transfer projects, can solve the problems of multiple times of opening and closing of water sluice gates, and achieve the effect of prolonging the time of a single water withdrawal, improving the efficiency of water withdrawal, and avoiding excessive water withdrawal

Active Publication Date: 2021-06-18
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of artificial prediction level and the conservative operation in the early stage, the water level deviation often needs to be corrected frequently in the later stage, and the number of opening and closing of the retreat gate is large

Method used

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  • Emergency regulation and control method for water return gate in accident section of open channel water conveyance project
  • Emergency regulation and control method for water return gate in accident section of open channel water conveyance project
  • Emergency regulation and control method for water return gate in accident section of open channel water conveyance project

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Such as figure 1 As shown, an emergency control method for the retreat sluice of the accident section of the open channel water conveyance project includes the following steps:

[0058] S1. Establish a one-dimensional non-uniform flow simulation model of the channel in the accident section;

[0059] S2. Based on the one-dimensional non-uniform flow simulation model, obtain the pre-accident t 0 The volume of the water body in the accident section at the moment;

[0060] S3. Based on the one-dimensional non-uniform flow simulation model, obtain the post-accident t 1 The volume of the water body in the accident section at the moment;

[0061] S4, according to t 0 moment and t 1 The volume of the water body in the accident section at the moment, and the estimated opening time of the retreat gate is obtained;

[0062] S5. Obtain the water level fluctuation period in the hydraulic transition process;

[0063] S6, monitor the water level at the retreat gate and the wate...

Embodiment 2

[0102] Such as figure 2 As shown, the channel in the accident section includes the upper control gate, the lower control gate and the retreat gate. The enabling water level of the retreat gate is Y max , the closing water level is Y min . Before the accident, the channel water flow is Q(t 0 ), the water level in front of the gate is Y gate (t 0 ). After the accident, the upper and lower control gates are closed in an emergency, and the water delivery flow is reduced to Q(t 1 ). In order to ensure that during the hydraulic transition process, the instantaneous water level at the retreat sluice does not exceed Y max , the water level in front of the gate is stable at Y gate (t 1 ), adopt the following control method of water sluice.

[0103] 1. Establish a one-dimensional non-uniform flow simulation model of the channel in the accident section. Commercial software in the water conservancy industry, such as HEC-RAS, Mike 11, etc. can be used, and languages ​​such as ...

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PUM

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Abstract

The invention discloses an emergency regulation and control method for a water return gate in an accident section of an open channel water conveyance project, and the method comprises the steps: obtaining the starting time of the required water return gate, and timely and orderly arranging water return according to the water regimen in the early stage of emergency scheduling. In the later period of emergency dispatching, the water level prediction formula calculation result is combined, and the water return gate starting time is corrected; in the aspect of setting the closing water level of the recession gate, the design water level is replaced by the normal operation lower limit water level, so that the single recession time of the recession gate is prolonged. According to the method, the starting frequency of the water recession gate can be reduced, and the orderliness and reliability of emergency regulation and control are improved.

Description

technical field [0001] The invention belongs to the field of water conveyance engineering, and in particular relates to an emergency control method for a water return sluice in an accident section of an open channel water conveyance project. Background technique [0002] In order to adjust the uneven distribution of water resources, many long-distance open channel water delivery projects have been built in my country, such as the middle route project and the east route project of the South-to-North Water Diversion Project. In order to facilitate the adjustment of water level and flow, control gates are set at certain distances in the channel. In order to deal with emergencies, there is a backwater gate in the channel. [0003] During emergency dispatch, the control gates at both ends of the accident point are quickly closed to reduce the water flow. The water flow in the accident section keeps moving downstream under the action of inertia. After being hindered by the contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 崔巍穆祥鹏陈文学武哲如刘哲吴鑫
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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