CN117933113A - Water delivery engineering gate scheduling operation method and device - Google Patents
Water delivery engineering gate scheduling operation method and device Download PDFInfo
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Abstract
The invention discloses a water delivery engineering gate scheduling operation method and device, comprising the following steps: determining the relation among the water level, the flow and the valve opening in the water delivery engineering channel according to the one-dimensional hydrodynamic model; determining channel flow state based on the relation among water level, flow and valve opening, and calculating the gate passing flow of an upstream gate in a water delivery engineering channel; predicting the gate passing flow of the upstream gate at the next moment according to the gate passing flow of the upstream gate at the current moment; calculating a difference value of upstream gate passing flow at front and rear moments, taking the difference value of the upstream gate passing flow at the front and rear moments as a downstream gate opening correction parameter, and calculating the gate opening of the downstream gate; and scheduling the downstream gate before the large-flow flood peak enters the canal according to the gate opening of the downstream gate. The invention can control the water level in the channel more quickly and stably under the condition of large-flow flood peak entering the channel, and is beneficial to excavating the inherent water delivery potential of the main channel.
Description
Technical Field
The invention relates to a water delivery engineering gate scheduling operation method and device, and belongs to the technical field of hydraulic control.
Background
Along with the development of social economy and the acceleration of urban process, various water delivery buildings are constructed in a large quantity, and the water delivery buildings have obvious influence on the aspects of the hydrodynamic field, flood control safety, water delivery capacity and the like of river channels/channels in the form of engineering groups. The water delivery engineering crosses four watershed zones, the engineering scale is huge, the control nodes are more, the possible situations are complex, and the neutral line engineering belongs to a typical multi-dimensional, multi-process, multi-phase, multi-flow state and multi-constraint hydraulic system in terms of hydraulic scheduling, so that the safety control difficulty is extremely high. The full understanding and optimization of the hydraulic effect of wading along a line has a critical meaning for improving the overall water delivery capacity of the centerline engineering.
At present, research on wading building groups is mainly limited to accumulated water choking effect of bridge groups, and various water delivery buildings along water delivery engineering have more complicated and various flow fields and head loss characteristics, such as horizontal detouring of piers, water surface line fluctuation and water leap caused by downstream karman vortex street and throttle opening and closing, surge problems of overpasses and the like. The research on the influence of the cluster effect of the hydraulic phenomenon on the overall flow state of the trunk channel and the corresponding water delivery capacity digging aspect is still fresh in a large-scale water delivery system, and the research becomes one of the working key points of improving the water delivery capacity of the central line engineering in the future.
The hydraulic dispatching scheme of the total main canal of the water delivery engineering (water level of each section, opening and closing opening of a water delivery building and the like) obviously influences water delivery flow, flow velocity distribution, flow state and the like, and determines head loss. Therefore, the hydraulic scheduling scheme of the neutral line engineering is optimized, feasibility of improving water conveying capacity and related measures are explored, and the hydraulic scheduling scheme has practical value for long-distance water conveying engineering.
Disclosure of Invention
In order to solve the water conservancy scheduling problem when the large-flow flood peak enters the canal, the invention provides a water conservancy scheduling operation method and a water conservancy scheduling operation device for a gate of a water delivery project.
In order to solve the technical problems, the invention adopts the following technical means:
In a first aspect, the present invention provides a method for scheduling and operating a water delivery engineering gate, including the following steps:
determining the relation among the water level, the flow and the valve opening in the water delivery engineering channel according to the one-dimensional hydrodynamic model;
Determining channel flow state based on the relation among the water level, the flow and the valve opening, and calculating the gate passing flow of an upstream gate in a water delivery engineering channel;
Predicting the gate passing flow of the upstream gate at the next moment according to the gate passing flow of the upstream gate at the current moment;
calculating the difference value of the upstream gate passing flow at the front and rear moments, taking the difference value of the upstream gate passing flow at the front and rear moments as a downstream gate opening correction parameter, and calculating the gate opening of the downstream gate;
and scheduling the downstream gate before the large-flow flood peak enters the canal according to the gate opening of the downstream gate.
With reference to the first aspect, further, the one-dimensional hydrodynamic model includes a continuous equation and a momentum equation, and the expression is as follows:
Wherein A is the cross-sectional area of the channel, Q is the average flow of the section, Q l is the side inflow or outflow, h is the channel water level, C z is the talent coefficient, R is the hydraulic radius, g is the gravitational acceleration, t is the time, x is the distance of the fixed section of the channel along the flow path, and v is the flow velocity of the section in the channel;
wherein, the calculation formula of the thank you coefficient C z is as follows:
Wherein n is a Manning coefficient.
With reference to the first aspect, further, the classification of channel flow state includes submerged orifice flow, free orifice flow, submerged weir flow, free weir flow.
With reference to the first aspect, further, a calculation formula of the gate passing flow of the upstream gate in the water delivery engineering channel is as follows:
Wherein Q Pass gate is the gate flow, C w is the comprehensive overcurrent coefficient, W is the gate width, h u is the gate upstream water level, h d is the gate downstream water level, h cr is the gate bottom plate elevation, d g is the gate opening, g is the gravity acceleration, and μ is the dynamic viscosity.
With reference to the first aspect, further, predicting the gate passing flow of the upstream gate at the next moment according to the gate passing flow of the upstream gate at the current moment includes:
wherein, For the gate flow rate of the gate upstream of the k+1 time,/>For the gate flow of the upstream gate at time k, C w is the integrated flow coefficient, W is the gate width, g is the gravitational acceleration,/>Is the upstream water level of the upstream gate at the moment k,/>For the elevation of the gate bottom plate at time k/(Upstream water level of upstream gate at time k+1,/>For the downstream water level of the upstream gate at time k,/>Is the downstream water level of the upstream gate at the time of k+1, mu is the dynamic viscosity,/>For the gate opening of the upstream gate at time k,/>And the gate opening of the upstream gate at the time of k+1.
With reference to the first aspect, further, the difference between the upstream gate passing flow rates at the front and rear moments is taken as a downstream gate opening correction parameter, and the gate opening of the downstream gate is calculated according to the following calculation formula:
Wherein dg (K) is the gate opening of the downstream gate in the water delivery engineering at the time K, L is a scaling factor, e (K) is the water level control error at the time K, namely the difference between the monitored water level and the target water level, K p、Ki、Kd is the proportional, integral and derivative control coefficients respectively, and dQ u (K) is the passing gate flow variation of the upstream gate at the time K.
In a second aspect, the present invention provides a water delivery engineering gate scheduling operation device, including:
the model construction module is used for constructing a one-dimensional hydrodynamic model and determining the relation among the water level, the flow and the valve opening in the water delivery engineering channel according to the one-dimensional hydrodynamic model;
The gate flow calculation module is used for determining channel flow state based on the relation among the water level, the flow and the valve opening, and calculating gate flow of an upstream gate in the water delivery engineering channel;
the gate passing flow prediction module is used for predicting the gate passing flow of the upstream gate at the next moment according to the gate passing flow of the upstream gate at the current moment;
The gate opening calculating module is used for calculating the difference value of the upstream gate passing flow at the front and rear moments, taking the difference value of the upstream gate passing flow at the front and rear moments as a downstream gate opening correction parameter, and calculating the gate opening of the downstream gate;
And the downstream gate scheduling module is used for scheduling the downstream gate before the large-flow flood peak enters the canal according to the gate opening of the downstream gate.
With reference to the second aspect, in the gate flow calculation module, a calculation formula of the gate flow of the upstream gate in the water delivery engineering channel is as follows:
Wherein Q Pass gate is the gate flow, C w is the comprehensive overcurrent coefficient, W is the gate width, h u is the gate upstream water level, h d is the gate downstream water level, h cr is the gate bottom plate elevation, d g is the gate opening, g is the gravity acceleration, and μ is the dynamic viscosity.
With reference to the second aspect, in the gate flow prediction module, the predicting the gate flow of the upstream gate at the next moment according to the gate flow of the upstream gate at the current moment includes:
wherein, For the gate flow rate of the gate upstream of the k+1 time,/>For the gate flow of the upstream gate at time k, C w is the integrated flow coefficient, W is the gate width, g is the gravitational acceleration,/>Is the upstream water level of the upstream gate at the moment k,/>For the elevation of the gate bottom plate at time k/(Upstream water level of upstream gate at time k+1,/>For the downstream water level of the upstream gate at time k,/>Is the downstream water level of the upstream gate at the time of k+1, mu is the dynamic viscosity,/>For the gate opening of the upstream gate at time k,/>And the gate opening of the upstream gate at the time of k+1.
With reference to the second aspect, further, in the gate opening calculating module, a calculation formula of a gate opening of the downstream gate is as follows:
Wherein dg (K) is the gate opening of the downstream gate in the water delivery engineering at the time K, L is a scaling factor, e (K) is the water level control error at the time K, namely the difference between the monitored water level and the target water level, K p、Ki、Kd is the proportional, integral and derivative control coefficients respectively, and dQ u (K) is the passing gate flow variation of the upstream gate at the time K.
The following advantages can be obtained by adopting the technical means:
The invention provides a water delivery engineering gate scheduling operation method and device, which are used for adjusting the opening of a downstream gate according to the flow change of the upstream gate in water delivery engineering under the condition of considering upstream and downstream flow connection, calculating reasonable downstream gate opening, and opening the downstream gate in advance before a large flow flood peak enters a canal, so that the water level in a channel can be controlled more quickly and stably under the condition of the large flow flood peak entering the canal, the hydraulic scheduling mode of the total main canal of the water delivery engineering is perfected, and the inherent water delivery potential of the main canal is conveniently excavated.
The invention ensures the water delivery capacity of the water delivery engineering, is favorable for the structural safety, ensures the improvement of the overall comprehensive water delivery capacity of the water delivery channel by reasonably controlling the scheduling operation modes of water levels and gates of each section, and has more sufficient key significance.
Drawings
FIG. 1 is a flow chart of steps of a water delivery engineering gate scheduling operation method of the present invention;
FIG. 2 is a schematic diagram of flow-water level crossing in a cross lattice method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a water level without considering upstream and downstream flow connections and with consideration of upstream and downstream flow connections according to an embodiment of the present invention;
FIG. 4 is a graph showing the variation of water level before a downstream channel transition gate is scheduled in accordance with the present invention and in accordance with the prior art;
FIG. 5 is a graph comparing changes in water level under a sluice of a downstream and upstream aqueduct scheduled by the method of the present invention and the prior art method;
FIG. 6 is a graph comparing the change in water level before the downstream aqueduct gate is scheduled by the method of the present invention and by the prior art method.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings:
Example 1
The invention relates to the field of comprehensive improvement of flow state and hydraulic control research of a typical canal section water delivery building of water delivery engineering, and in particular relates to a water delivery engineering gate scheduling operation method considering upstream and downstream flow connection, which is shown in fig. 1 and comprises the following steps:
And A, constructing a one-dimensional hydrodynamic model, and determining the relation among the water level, the flow and the valve opening in the water delivery engineering channel according to the one-dimensional hydrodynamic model.
The method simulates the hydrodynamic process of a typical canal section of the water delivery engineering by establishing the one-dimensional hydrodynamic model, and the one-dimensional hydrodynamic model can truly reflect the relation between the water level and the flow and the opening of the gate, thereby providing a numerical control carrier for hydraulic control.
In the embodiment of the invention, a one-dimensional hydrodynamic model adopts a Saint Violet equation set to simulate a channel water flow process, and comprises a continuous equation and a momentum equation, wherein the expression is as follows:
Wherein A is the cross-sectional area of the channel, Q is the average flow of the section, Q l is the side inflow or outflow, h is the channel water level, C z is the talent coefficient, R is the hydraulic radius, g is the gravitational acceleration, t is the time, x is the distance of the fixed section of the channel along the flow path, and v is the flow velocity of a certain section in the channel.
Wherein, the calculation formula of the thank you coefficient C z is as follows:
Wherein n is a Manning coefficient.
In the embodiment of the invention, the one-dimensional hydrodynamic model can be solved by adopting a finite difference method, and the channel is divided into flow-water level crossed computing nodes by a space discrete method of crossed grid points, as shown in figure 2. In order to ensure the stability of calculation, the invention adopts an implicit method to simulate the time course, and can convert the formula (1) into:
Wherein A i is the cross-sectional area of the ith computing node, Q i-1/2 is the cross-sectional average flow of the (i-1/2) th computing node, v i+1/2 is the cross-sectional flow velocity of the (i+1/2) th computing node, H i is the channel water level of the ith compute node.
And B, determining the channel flow state based on the relation among the water level, the flow and the valve opening, and calculating the gate passing flow of an upstream gate in the water delivery engineering channel.
When the upstream water level and the downstream water level are linked by the sluice, namely when the sluice is arranged between the upstream water level and the downstream water level, the calculation of the section average flow of the water flow passing through the sluice is replaced by the sluice equation to calculate the sluice flow in order to fully consider the flow of the water flow passing through the sluice. The invention adopts independently developed calculation software, can support a common gate equation, and comprises four flow states: submerged orifice flow, free orifice flow, submerged weir flow, free weir flow.
And determining channel flow state according to the relation between the upstream water level and the downstream water level and the opening degree of the gate, and further selecting a corresponding calculation formula according to the channel flow state to calculate the gate passing flow. In the embodiment of the invention, the calculation formulas of the passing gate flow rates of four flow states are as follows:
Wherein Q Pass gate is the gate flow, C w is the comprehensive overcurrent coefficient, W is the gate width, h u is the gate upstream water level, h d is the gate downstream water level, h cr is the gate bottom plate elevation, d g is the gate opening, g is the gravity acceleration (9.81 m/s 2), and μ is the dynamic viscosity.
By collecting the related data of the upstream gate in the water delivery engineering, the real-time gate passing flow of the upstream gate can be calculated by combining the formula (4).
And C, predicting the gate passing flow of the upstream gate at the next moment according to the gate passing flow of the upstream gate at the current moment.
In the solving process, the gap flow of the next moment of the four flow states can be solved according to the Taltier expansion by combining the formula (4), and the calculation formula is as follows:
wherein, For the gate flow rate of the gate upstream of the k+1 time,/>The flow rate of the upstream gate at the time k,Is the upstream water level of the upstream gate at the moment k,/>For the elevation of the gate bottom plate at time k/(Upstream water level of upstream gate at time k+1,/>For the downstream water level of the upstream gate at time k,/>Is the downstream water level of the upstream gate at the time of k+1,/>For the gate opening of the upstream gate at time k,/>And the gate opening of the upstream gate at the time of k+1.
In the embodiment of the invention, the water level and the gate opening at the current moment can be directly detected by the equipment, and the water level and the gate opening at the next moment can be obtained by combining the historical data prediction in the prior art.
And D, calculating a difference value of the upstream gate passing flow at the front and rear moments, and calculating the gate opening of the downstream gate by taking the difference value of the upstream gate passing flow at the front and rear moments as a downstream gate opening correction parameter.
Step D02, calculating the difference value of the upstream gate passing flow at the front and rear moments by combining the formulas (4) and (5):
Wherein dQ u (k+1) is the difference between the gate flow rate of the upstream gate at time k+1 and the gate flow rate of the upstream gate at time k.
Step D02, the invention proposes that on the basis of controlling the water levels of all channels before the gates, the scheduling (feedback feedforward control) of the upstream and downstream flow connection is considered, and the gate opening calculation formula of the downstream gate is as follows:
Wherein dg (K) is the gate opening of the downstream gate in the water delivery engineering at the K moment, L is a scaling factor, e (K) is the water level control error at the K moment, namely the difference between the monitored water level and the target water level, K p、Ki、Kd is the proportional, integral and derivative control coefficients respectively, dQ u (K) is the gate flow variation of the upstream gate at the K moment, namely the difference between the gate flow of the upstream gate at the K moment and the gate flow of the upstream gate at the K-1 moment, and K is the time step.
In the embodiment of the present invention, L, K p、Ki coefficients are usually obtained by adopting a trial algorithm, and K d is usually set to 0 according to the fine adjustment of the control result.
And E, dispatching the downstream gate before the large-flow flood peak enters the canal according to the gate opening of the downstream gate.
The invention assumes a scheduling scenario and scheduling objectives: according to the actual situation of water delivery engineering, the large-flow flood peak of the canal section is assumed to be 420m 3/s, the water level before the gate of all channels is controlled to be at the control water level, and the flow overflow is increased under the control water level.
As shown in FIG. 3, if the flow engagement of the upstream gate and the downstream gate is not considered, the simulation analysis of the model in the step A proves that the safe operation of each channel at the control water level cannot be ensured due to the large upstream water supply. And model calculation shows that the phenomenon of a diffuse channel can occur in the scheduling process of the time period. Therefore, the simulation analysis of the scheme can find that the upstream aqueduct is the bottleneck of the large-flow water delivery of the channel section, and the downstream water level needs to be reasonably reduced to ensure the overflow of the upstream aqueduct.
The method considers the flow connection of the upstream gate and the downstream gate, and ensures that the channel can safely and smoothly flow under the condition of large-flow flood peak entering the channel by reducing the water level of the channel. The gate opening degree of the downstream gate which needs to be opened is calculated, then the downstream gate is opened before a large-flow flood peak enters the canal, and the water level is reduced in advance, so that when the flow is increased and the flow is overflowed, the actual water level is lower than the control water level, and the phenomena of overhigh water level and overflow channel are avoided.
The water level changes at different positions in the channel under the gate scheduling method (the existing method) which does not consider the upstream and downstream gate flow connection to perform feedback control and the gate scheduling method (namely the method) which considers the upstream and downstream gate flow connection to perform feedback feedforward control are shown in fig. 4-6, and it can be seen from fig. 4-6 that after the gates are scheduled by the method of the invention, the water level in the channel can be controlled to be under a control water level target more quickly and more stably under the condition of large-flow flood peak entering the channel, and as can be seen from fig. 5, the water level at the water delivery bottleneck can be further reduced by nearly 10cm under the scheduling which considers the upstream and downstream gate flow connection, and the phenomenon of diffuse groove possibly occurring in the channel section in the water delivery process can be effectively avoided.
Example 2
The same inventive concept as that of embodiment 1 is based on the same inventive concept, and this embodiment introduces a water delivery engineering gate scheduling operation device, including a model building module, a gate flow calculating module, a gate flow predicting module, a gate opening calculating module, and a downstream gate scheduling module.
The model construction module is mainly used for constructing a one-dimensional hydrodynamic model, and determining the relation among the water level, the flow and the valve opening in the water delivery engineering channel according to the one-dimensional hydrodynamic model.
The gate flow calculation module is mainly used for determining channel flow state based on the relation among water level, flow and valve opening, calculating gate flow of an upstream gate in a water delivery engineering channel, and the calculation formula is as follows:
Wherein Q Pass gate is the gate flow, C w is the comprehensive overcurrent coefficient, W is the gate width, h u is the gate upstream water level, h d is the gate downstream water level, h cr is the gate bottom plate elevation, d g is the gate opening, g is the gravity acceleration, and μ is the dynamic viscosity.
The gate flow prediction module is mainly used for predicting the gate flow of the upstream gate at the next moment according to the gate flow of the upstream gate at the current moment, and the calculation formula is as follows:
wherein, For the gate flow rate of the gate upstream of the k+1 time,/>For the gate flow of the upstream gate at time k, C w is the integrated flow coefficient, W is the gate width, g is the gravitational acceleration,/>Is the upstream water level of the upstream gate at the moment k,/>For the elevation of the gate bottom plate at time k/(Upstream water level of upstream gate at time k+1,/>For the downstream water level of the upstream gate at time k,/>Is the downstream water level of the upstream gate at the time of k+1, mu is the dynamic viscosity,/>For the gate opening of the upstream gate at time k,/>And the gate opening of the upstream gate at the time of k+1.
The gate opening calculating module is mainly used for calculating the difference value of the upstream gate passing flow at the front and rear moments, taking the difference value of the upstream gate passing flow at the front and rear moments as a downstream gate opening correction parameter, and calculating the gate opening of the downstream gate. Wherein, the calculation formula of the gate opening of the downstream gate is as follows:
Wherein dg (K) is the gate opening of the downstream gate in the water delivery engineering at the time K, L is a scaling factor, e (K) is the water level control error at the time K, namely the difference between the monitored water level and the target water level, K p、Ki、Kd is the proportional, integral and derivative control coefficients respectively, and dQ u (K) is the passing gate flow variation of the upstream gate at the time K.
The downstream gate scheduling module is mainly used for scheduling the downstream gate before the large-flow flood peak enters the canal according to the gate opening of the downstream gate.
Specific functional implementation of each module is related to the method in reference to embodiment 1, and will not be described in detail.
According to the invention, the downstream gate of the channel in the water delivery engineering is reasonably scheduled under the condition of considering the connection of upstream and downstream flow, the flow state of a typical channel water delivery building is estimated and regulated, the hydraulic scheduling mode is perfected, the inherent water delivery potential of the main channel is effectively excavated, and the water level in the channel can be controlled more rapidly and stably under the condition of large-flow flood peak entering the channel. The invention ensures the water delivery capacity of the water delivery engineering, is favorable for the structural safety, ensures the improvement of the overall comprehensive water delivery capacity of the water delivery channel by reasonably controlling the scheduling operation modes of water levels and gates of each section, and has more sufficient key significance.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (10)
1. The water delivery engineering gate scheduling operation method is characterized by comprising the following steps of:
determining the relation among the water level, the flow and the valve opening in the water delivery engineering channel according to the one-dimensional hydrodynamic model;
Determining channel flow state based on the relation among the water level, the flow and the valve opening, and calculating the gate passing flow of an upstream gate in a water delivery engineering channel;
Predicting the gate passing flow of the upstream gate at the next moment according to the gate passing flow of the upstream gate at the current moment;
calculating the difference value of the upstream gate passing flow at the front and rear moments, taking the difference value of the upstream gate passing flow at the front and rear moments as a downstream gate opening correction parameter, and calculating the gate opening of the downstream gate;
and scheduling the downstream gate before the large-flow flood peak enters the canal according to the gate opening of the downstream gate.
2. The method of claim 1, wherein the one-dimensional hydrodynamic model comprises a continuous equation and a momentum equation expressed as follows:
Wherein A is the cross-sectional area of the channel, Q is the average flow of the section, Q l is the side inflow or outflow, h is the channel water level, C z is the talent coefficient, R is the hydraulic radius, g is the gravitational acceleration, t is the time, x is the distance of the fixed section of the channel along the flow path, and v is the flow velocity of the section in the channel;
wherein, the calculation formula of the thank you coefficient C z is as follows:
Wherein n is a Manning coefficient.
3. The method of claim 1, wherein the categories of channel flow patterns include submerged orifice flow, free orifice flow, submerged weir flow, free weir flow.
4. A method of scheduling operation of a water works gate according to claim 3, wherein the calculation formula of the gate flow of the upstream gate in the water works channel is as follows:
Wherein Q Pass gate is the gate flow, C w is the comprehensive overcurrent coefficient, W is the gate width, h u is the gate upstream water level, h d is the gate downstream water level, h cr is the gate bottom plate elevation, d g is the gate opening, g is the gravity acceleration, and μ is the dynamic viscosity.
5. The method according to claim 1, wherein predicting the gate flow rate of the upstream gate at the next time based on the gate flow rate of the upstream gate at the current time, comprises:
wherein, For the gate flow rate of the gate upstream of the k+1 time,/>For the gate flow of the upstream gate at time k, C w is the integrated flow coefficient, W is the gate width, g is the gravitational acceleration,/>Is the upstream water level of the upstream gate at the moment k,/>For the elevation of the gate bottom plate at time k/(Upstream water level of upstream gate at time k+1,/>For the downstream water level of the upstream gate at time k,/>Is the downstream water level of the upstream gate at the time of k+1, mu is the dynamic viscosity,/>The gate opening of the upstream gate at the time k,And the gate opening of the upstream gate at the time of k+1.
6. The method according to claim 1, wherein the difference between the upstream gate flow rates at the front and rear times is used as a downstream gate opening correction parameter, and the gate opening of the downstream gate is calculated by the following formula:
Wherein dg (K) is the gate opening of the downstream gate in the water delivery engineering at the time K, L is a scaling factor, e (K) is the water level control error at the time K, namely the difference between the monitored water level and the target water level, K p、Ki、Kd is the proportional, integral and derivative control coefficients respectively, and dQ u (K) is the passing gate flow variation of the upstream gate at the time K.
7. A water works gate dispatch operation device, characterized by comprising:
the model construction module is used for constructing a one-dimensional hydrodynamic model and determining the relation among the water level, the flow and the valve opening in the water delivery engineering channel according to the one-dimensional hydrodynamic model;
The gate flow calculation module is used for determining channel flow state based on the relation among the water level, the flow and the valve opening, and calculating gate flow of an upstream gate in the water delivery engineering channel;
the gate passing flow prediction module is used for predicting the gate passing flow of the upstream gate at the next moment according to the gate passing flow of the upstream gate at the current moment;
The gate opening calculating module is used for calculating the difference value of the upstream gate passing flow at the front and rear moments, taking the difference value of the upstream gate passing flow at the front and rear moments as a downstream gate opening correction parameter, and calculating the gate opening of the downstream gate;
And the downstream gate scheduling module is used for scheduling the downstream gate before the large-flow flood peak enters the canal according to the gate opening of the downstream gate.
8. The water delivery engineering gate scheduling operation device according to claim 7, wherein in the gate flow calculation module, a calculation formula of the gate flow of the upstream gate in the water delivery engineering channel is as follows:
Wherein Q Pass gate is the gate flow, C w is the comprehensive overcurrent coefficient, W is the gate width, h u is the gate upstream water level, h d is the gate downstream water level, h cr is the gate bottom plate elevation, d g is the gate opening, g is the gravity acceleration, and μ is the dynamic viscosity.
9. The water delivery engineering gate scheduling operation device according to claim 7, wherein the gate flow prediction module predicts the gate flow of the upstream gate at the next moment according to the gate flow of the upstream gate at the current moment, and includes:
wherein, For the gate flow rate of the gate upstream of the k+1 time,/>For the gate flow of the upstream gate at time k, C w is the integrated flow coefficient, W is the gate width, g is the gravitational acceleration,/>Is the upstream water level of the upstream gate at the moment k,/>For the elevation of the gate bottom plate at time k/(Upstream water level of upstream gate at time k+1,/>For the downstream water level of the upstream gate at time k,/>Is the downstream water level of the upstream gate at the time of k+1, mu is the dynamic viscosity,/>The gate opening of the upstream gate at the time k,And the gate opening of the upstream gate at the time of k+1.
10. The water delivery engineering gate scheduling operation apparatus according to claim 7, wherein in the gate opening calculation module, a calculation formula of a gate opening of a downstream gate is as follows:
Wherein dg (K) is the gate opening of the downstream gate in the water delivery engineering at the time K, L is a scaling factor, e (K) is the water level control error at the time K, namely the difference between the monitored water level and the target water level, K p、Ki、Kd is the proportional, integral and derivative control coefficients respectively, and dQ u (K) is the passing gate flow variation of the upstream gate at the time K.
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