Bank tower water intake stoplog and pump set flow joint control method and system

Abstract

The application discloses a bank tower type water intake stoplog gate and pump group flow joint control method and system, 1, collecting the upstream water level of the bank tower type water intake, the water intake flow, the pump group operation combination, the current stoplog gate layer confirmed by position feedback, the current stoplog gate position configuration and the actuator state; 2, determining the candidate gate layer according to the gate layer, the adjacent gate layer conversion relationship and the actuator state; 3, for each candidate gate layer, selecting the hydraulic safety boundary data from the hydraulic safety boundary data that meets the applicable conditions; 4, selecting the scheme of the candidate gate layer that meets the safety condition as the target operation scheme; 5, after each gate layer, pump group or flow action is completed, obtaining the equipment execution state confirmation information and stable operation data that are consistent with the control instruction; S6, when the hydraulic safety boundary data does not match, the input data is invalid, the communication is interrupted, the position feedback is abnormal, the actuator fails or the action is timed out, the automatic increase of the gate top elevation is prohibited.

Description

Technical Field

[0001] This invention relates to the field of hydraulic structure operation control and water supply engineering automation technology, specifically to a method and system for joint control of flow rate of a bank tower type water intake stacked beam gate and pump group. Background Technology

[0002] Shore-mounted intake systems adjust the gate top elevation by adding or removing overlapping beams to adapt to changes in reservoir water level and intake stratum. Changes in gate stratum alter the gate top submergence depth, local flow cross-section, and downstream flow pattern. Furthermore, variations in intake flow rate and pump unit operation combinations affect local flow velocity at the gate top, head loss, surface vortices, and the risk of air entrainment. Therefore, at the same upstream water level, different pump unit operation combinations, intake flow rates, and candidate gate locations may require different safe submergence depths.

[0003] CN111506140B discloses a control system and method for a multi-layered beam gate, which controls multiple layers of beam gates and movable beam gates to maintain the submersion depth by controlling water level changes. CN115506317B discloses an automatic stratified water intake method and system, which controls the beam gates based on a comparison of water level, the number of beam gates, and the theoretical water intake height. CN115404828A discloses a method for counting, identifying, and remotely raising and lowering beam gates layer by layer. The above technologies can adjust the gate layers according to water level or theoretical water intake height and support the automation of the gate operator; however, when changes in candidate gate positions lead to changes in local flow geometry and hydraulic conditions, the existing technologies usually do not explicitly require the use of corresponding hydraulic safety boundaries for each candidate gate position, which may result in the boundary of the current gate position or a unified gate position being used for other candidate gate positions; furthermore, if there is no safe gate layer under the current pump set and flow conditions, there is also a lack of a mechanism to re-verify the pump set-flow adjustment scheme using the same set of hydraulic safety boundaries.

[0004] Although pump set combinations and flow rate settings can be selected based on water supply demand during pump station scheduling, if pump set scheduling and gate layer selection adopt independent rules, the candidate gate layer will not be able to provide sufficient safe flooding depth for the determined pump set-flow state. Summary of the Invention

[0005] In view of this, the present invention aims to provide a method and system for joint control of the stacked beam gate and pump flow of a shore-tower type water intake. When the upstream water level, water intake flow, pump operation combination and stacked beam gate position change together, a corresponding and verified hydraulic safety boundary is adopted for each candidate gate position to determine the candidate gate layer that meets the safety conditions. If there is no safe gate layer under the current operating conditions, a safe gate layer is obtained again by adjusting the pump operation combination or water intake flow to avoid raising the gate in an unsafe direction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The method for joint control of flow rate of the bank tower type water intake stacked beam gate and pump unit according to the present invention includes the following steps: S1. Collects upstream water level, water intake flow rate, pump unit operation combination, current number of stacked beam gate layers confirmed by location feedback, current stacked beam gate position configuration, and actuator status of the shore tower type water intake.

[0007] S2. Determine candidate door layers based on the door layer, the conversion relationship between adjacent door layers, and the status of the actuator, and determine the door top elevation and candidate door position configuration corresponding to each candidate door layer.

[0008] S3. For each candidate gate layer, select hydraulic safety boundary data that matches the applicable conditions from the verified hydraulic safety boundary data according to the pump set operation combination, inlet geometry configuration, candidate gate configuration, and water intake flow rate. To avoid the safety boundary from decreasing locally with increasing flow rate due to experimental, simulation, or field measurement errors, first perform monotonic correction according to the partial safety principle, then interpolate between adjacent flow nodes, and determine the required safe inundation depth based on measurement error, gate top elevation error, and boundary identification uncertainty. Take the difference between the upstream water level and the gate top elevation of the candidate gate layer as the actual inundation depth, and determine the candidate gate layers whose actual inundation depth is equal to or greater than the required safe inundation depth as candidate gate layers that meet the safety conditions.

[0009] S4. When there are one or more candidate gate layers that meet the safety conditions, select the gate layer with the highest gate top elevation as the target gate layer. The stacked beam gate is adjusted by changing only one adjacent gate layer at a time. Before raising the gate top elevation, it should be confirmed that both the current gate layer and the gate layer to be reached meet the safety requirements, the water level and flow rate are within a stable range, and the gate layer to be reached has the specified stability margin. When the current gate layer no longer meets the safety requirements, it is only allowed to maintain or reduce the gate top elevation, reduce the water intake flow rate, or adjust the pump set operation combination. It is not allowed to automatically raise the gate top elevation.

[0010] If no candidate gate layer meets the safety conditions, the scheme that can be implemented in the current state is selected from the preset pump group-flow adjustment scheme according to the on-site interlocking conditions. The scheme is then checked from high to low according to the water intake flow rate setting value, and the scheme that can re-obtain at least one candidate gate layer that meets the safety conditions is selected as the target operation scheme.

[0011] The preset pump set-flow adjustment scheme includes pump set operation combination, water intake flow set value, pre-conditions required for switching from the current operating state to the scheme, interlock permission information, and equipment execution status confirmation information. When adjusting from the current operating state to the target operating scheme, only one pump set start-up / shutdown or one flow set value adjustment is performed per control cycle. After obtaining the equipment execution status confirmation information and stable operating data that match the control command, each candidate gate layer is re-verified. If the verifiable interlock permission information cannot be obtained, only a suggested adjustment scheme and a manual confirmation request are output, and automatic issuance of equipment action commands is prohibited.

[0012] S5. After each gate, pump group, or flow action is completed, obtain equipment execution status confirmation information and stable operation data that match the control command, and re-determine candidate gates that meet the safety conditions and subsequent control measures.

[0013] S6. In the event of hydraulic safety boundary data mismatch, input data failure, communication interruption, abnormal position feedback, actuator malfunction, or action timeout, automatic raising of the gate top elevation is prohibited, and at least one safety handling request should be output, including maintaining or lowering the gate top elevation, reducing the water intake flow, stopping the pump, alarming, or manual intervention. When the water intake flow is higher than the maximum flow node covered by the hydraulic safety boundary data, raising the gate top elevation using the hydraulic safety boundary data is prohibited, and a request to reduce the water intake flow or an out-of-range alarm should be output. When the water intake flow is lower than the minimum flow node, the safety boundary value corresponding to the minimum flow node should be used, or a separately verified low-flow safety boundary data should be used.

[0014] Further, in step S2, the step of determining the top elevation of the door corresponding to the candidate door layer is as follows: S2.1 When the single-layer height of each stacked beam door is equal, let the verified zero-layer door top elevation be... Z b Single-layer height is h b Candidate gate layers i The number of layers is n i Then the top elevation of the candidate door layer Z g,i = Z b + n i · h b ; S2.2 When the single-layer height of each stacked beam door is not equal, the top elevation of each candidate door layer confirmed by on-site re-measurement or design verification shall be directly adopted.

[0015] Alternatively, in step S3, for the same pump set operating combination, inlet geometry configuration, and candidate gate configuration, the flow nodes are arranged in ascending order. Q 1 to Q m The corresponding original safety boundary value S* i,1 to S* i,m Monotonic corrections are made according to the partial safety principle to make the corrected safety boundary value S̄ i,j The modified safety boundary value remains constant or increases with increasing flow rate, and is equal to or greater than the corresponding original safety boundary value. Further, the modified safety boundary value... S̄ i,j satisfy S̄ i,j =max{ S* i,k |1≤ k ≤ j Candidate gate layers are determined by linear interpolation between adjacent flow nodes. i Boundary flooding depth S lim,i .

[0016] Further, in step S3, the verified hydraulic safety boundary data refers to data established through at least one of the following methods: physical model testing, numerical simulation verified by physical model testing or field measurement data, and controlled field calibration; under the same conditions of pump unit operation combination, inlet geometry configuration, candidate gate configuration, and flow node, verification conditions are arranged in descending order of gate top submersion depth; when a certain condition fails to meet the predetermined safety criteria for the first time, the gate top submersion depth corresponding to the most recent condition that meets all safety criteria is taken as the original safety boundary value; if there is no most recent condition, the hydraulic safety boundary data under that condition is recorded as invalid.

[0017] Furthermore, the safety criteria include at least two of the following: air entrainment criterion, local flow velocity at the top of the gate criterion, and comprehensive head loss criterion; the detection method and allowable value of each safety criterion are determined by the verification scheme of the target project, and the verification condition is deemed qualified only when all the safety criteria adopted meet the requirements.

[0018] Optionally, in step S3, the method of including the safety margin in each of the hydraulic safety boundary data is specified: if the water level measurement error, gate top elevation error, and boundary identification uncertainty have already been included in the safety boundary value during the verification stage, no further correction is required; if not included, the boundary inundation depth is specified. S lim,i Add confirmed non-negative correction amount to the basis. ΔS i To obtain the required safe flooding depth S req,i The method for incorporating the safety margin was not specified, and the non-negative correction amount was not provided. ΔS i When the boundary data is not used for automatic gate lifting judgment, the boundary data will not be used. When the inlet section, gate slot configuration, trash rack configuration, gate top elevation, or candidate gate position correspondence changes, resulting in the current operating conditions being inconsistent with the applicable conditions indicated in the hydraulic safety boundary data, the hydraulic safety boundary data will be stopped.

[0019] The shore-tower type water intake stacked beam gate and pump set flow combined control system of the present invention includes: The interface includes a water level measurement interface, a flow rate measurement interface, a pump set status interface, a stacked beam gate position feedback interface, an actuator status interface, a hydraulic safety boundary data unit, a joint control unit, a gantry crane control interface, a pump set control interface, and an alarm interface.

[0020] The hydraulic safety boundary data unit stores verified hydraulic safety boundary data, and each hydraulic safety boundary data indicates the applicable pump set operation combination, inlet geometry configuration, candidate gate configuration, and flow node.

[0021] The joint control unit is connected to the water level measurement interface, flow measurement interface, pump group status interface, stacked beam gate position feedback interface and actuator status interface respectively, and outputs control signals or safety handling requests through the gate machine control interface, pump group control interface and alarm interface.

[0022] The joint control unit is configured to execute the steps of the method for joint control of the flow rate of the bank tower type water intake stacked beam gate and pump group described in this invention; the joint control unit can be an industrial computer, a microcontroller or other industrial controller.

[0023] This invention employs a corresponding hydraulic safety boundary for each candidate gate position, reducing safety misjudgments caused by using the current gate position or a uniform gate position boundary after a gate position change. If no safe gate layer exists under current operating conditions, the pump set-flow adjustment scheme is verified using the same set of boundary data, ensuring that the target operating scheme simultaneously meets water supply requirements, gate layer safety conditions, and on-site interlocking requirements. By adjusting adjacent single layers, re-verifying after actions, and prohibiting automatic increases in gate top elevation during anomalies, the risk of repeated actions near the threshold and adjustments in unsafe directions under abnormal conditions is greatly reduced. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the shore tower-type water intake and control interface described in the embodiment.

[0025] Figure 2The overall flowchart of the joint control method described in the embodiment.

[0026] Figure 3 The flowchart for selecting hydraulic safety boundary data based on candidate gate positions is described in the embodiment.

[0027] Figure 4 The flowchart of the candidate gate layer security verification process described in the embodiment.

[0028] Figure 5 The flowchart for determining the target gate layer and adjacent actions as described in the embodiment.

[0029] Figure 6 The flowchart for adjusting the operation plan when there is no safety door layer as described in the embodiment.

[0030] Figure 7 The flowchart for post-action safety review and anomaly handling described in the embodiment.

[0031] Figure 8 The hardware and functional relationship diagram of the joint control system described in the embodiment.

[0032] Figure 9 The hydraulic safety boundary verification diagram of the candidate gate positions described in the embodiment.

[0033] Figure 10 The control flow state transition diagram described in the embodiment. Detailed Implementation

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given. However, the scope of protection of the present invention is not limited to the following embodiments.

[0035] The terminology, engineering data, and scope of application of the method for joint control of flow rate of the bank-type water intake stacked beam gate and pump unit described in this invention are as follows: Pump unit operation combination - indicates the pump units put into operation and their confirmed regulation status; Current door level - confirmed by feedback from the position of the stacked beam door; Current door position configuration number - used to identify the current door level, door slot configuration, and door top elevation; Candidate gate configuration number - used to characterize the gate configuration after the candidate gate layer action is completed. The candidate gate configuration number corresponds to the gate to be adjusted and is not mixed with the current gate configuration number. Inlet geometry configuration number - used to distinguish different configurations of inlet section, gate slot, trash rack and gate top elevation; each hydraulic safety boundary data indicates the applicable pump set operation combination, inlet geometry configuration number, candidate gate position configuration number and flow node; if the current operating conditions do not match any of these, the hydraulic safety boundary data shall not be used to improve the gate top elevation safety.

[0036] The door layer geometry record saves the verified door top elevation of each permissible door layer. Z g,i When the height of the beams on each floor is the same, it can be arranged according to... Z g,i = Z b + n i · h b Confirmed; among them Z b The verified elevation of the top of the zero-floor door. h b The height is for a single layer; when the height of the stacked beam doors on each layer is not the same, the top elevation of the stacked beam doors on each layer, which has been verified by the design or confirmed by on-site re-measurement, is directly adopted, without extrapolating according to the equal height relationship.

[0037] like Figure 2 As shown, the method for joint control of flow rate of the bank tower type water intake stacked beam gate and pump group according to the present invention includes the following steps: S1. Collect the upstream water level, water intake flow rate, pump unit operation combination, current number of stacked beam gate layers confirmed by location feedback, current stacked beam gate position configuration, and actuator status of the shore tower type water intake. S2. Determine candidate door layers based on the door layer, the conversion relationship between adjacent door layers, and the status of the actuator, and determine the door top elevation and candidate door position configuration corresponding to each candidate door layer; S3. For each candidate gate layer, according to the pump group operation combination, inlet geometric configuration, candidate gate configuration and water intake flow rate, select hydraulic safety boundary data that matches the applicable conditions from the verified hydraulic safety boundary data. Based on the safe inundation depth corresponding to adjacent flow nodes, perform monotonic correction and interpolation according to the partial safety principle to determine the required safe inundation depth of the candidate gate layer. Take the difference between the upstream water level and the gate top elevation of the candidate gate layer as the actual inundation depth, and determine the candidate gate layers whose actual inundation depth is equal to or greater than the required safe inundation depth as candidate gate layers that meet the safety conditions. S4. When there are candidate door layers that meet the safety conditions, select the door layer with the highest door top elevation as the target door layer. The stacked beam door is adjusted by changing only one adjacent door layer at a time. When there are no candidate door layers that meet the safety conditions, the preset pump group-flow adjustment scheme is checked one by one according to the on-site interlocking conditions. The scheme that can obtain at least one candidate door layer that meets the safety conditions is selected as the target operation scheme. The preset pump set-flow adjustment scheme includes pump set operation combination, water intake flow set value, pre-conditions required for switching from the current operating state to the scheme, interlock permission information, and equipment execution status confirmation information. When adjusting from the current operating state to the target operating scheme, only one pump set start-up / stop or one flow set value adjustment is performed per control cycle. After obtaining the equipment execution status confirmation information and stable operating data that match the control command, each candidate gate layer is re-verified. If verifiable interlock permission information cannot be obtained, only a suggested adjustment scheme and a manual confirmation request are output, and automatic issuance of equipment action commands is prohibited. S5. After each gate, pump group or flow action is completed, obtain equipment execution status confirmation information and stable operation data that match the control command, and re-determine candidate gates that meet the safety conditions and subsequent control measures. S6. In the event of hydraulic safety boundary data mismatch, input data failure, communication interruption, abnormal position feedback, actuator malfunction, or action timeout, automatic raising of the gate top elevation is prohibited, and at least one safety handling request should be output, including maintaining or lowering the gate top elevation, reducing the water intake flow, stopping the pump, alarming, or manual intervention. When the water intake flow is higher than the maximum flow node covered by the hydraulic safety boundary data, raising the gate top elevation using the hydraulic safety boundary data is prohibited, and a request to reduce the water intake flow or an out-of-range alarm should be output. When the water intake flow is lower than the minimum flow node, the safety boundary value corresponding to the minimum flow node should be used, or a separately verified low-flow safety boundary data should be used.

[0038] like Figure 1 , Figure 8 As shown, the combined control system for the bank tower type water intake stacked beam gate and pump group flow rate of the present invention includes: The interface includes a water level measurement interface, a flow rate measurement interface, a pump set status interface, a stacked beam gate position feedback interface, an actuator status interface, a hydraulic safety boundary data unit, a joint control unit, a gantry crane control interface, a pump set control interface, and an alarm interface.

[0039] The hydraulic safety boundary data unit stores verified hydraulic safety boundary data, and each hydraulic safety boundary data indicates the applicable pump set operation combination, inlet geometry configuration, candidate gate configuration, and flow node.

[0040] The joint control unit is connected to the water level measurement interface, flow measurement interface, pump group status interface, stacked beam gate position feedback interface and actuator status interface respectively, and outputs control signals or safety handling requests through the gate machine control interface, pump group control interface and alarm interface.

[0041] 1. Establishment and verification of hydraulic safety boundaries Hydraulic safety boundaries can be obtained through one or more of the following methods: physical model testing, numerical simulation with verification of field measurement data, and controlled field calibration. The boundary establishment scheme should specify in advance the pump unit operating combinations to be covered, inlet geometry, candidate gate configurations, flow nodes, submersion depth conditions, safety criteria, measurement or image recording methods, stability observation time, and stopping conditions.

[0042] When using a free surface physical model, the model scale and flow rate / velocity conversion relationships should be determined according to the similarity criteria adopted in the engineering project, and the model scale, flow conditions, measurement point locations, sampling frequency, number of repetitions, and measurement uncertainty should be recorded. When using numerical simulation, the inlet and outlet boundary conditions, free surface treatment methods, local mesh refinement areas, mesh independence checks, and comparisons with the flow velocity, pressure, or head loss data from the physical model or field data should be recorded; numerical simulation results that fail the comparison verification should not be used as effective hydraulic safety boundaries on their own.

[0043] Under the same pump set operating combination, inlet geometry configuration, candidate gate position configuration, and flow node conditions, verification operating conditions are arranged according to the gate top submersion depth from largest to smallest. Safety criteria may include air entrainment, local flow velocity at the gate top, and overall head loss, etc. Specific detection methods and allowable values ​​are determined by the engineering verification scheme and are saved together with the corresponding boundary data. The verified boundary values ​​are used during the operation of the control system, and it is prohibited to change the safety criteria during the control process.

[0044] When at least one safety criterion is not met for the first time under a certain operating condition, the most recent operating condition that satisfies all safety criteria is taken as the safety side boundary node. If the first operating condition does not meet the requirements, or if there is a lack of a verification operating condition that can confirm the transition relationship between qualified and unqualified, an effective hydraulic safety boundary is not formed under this operating condition, nor is it pushed outward in the direction of decreasing inundation depth.

[0045] Field calibration should be conducted within the limits permitted by existing hard interlocks and operating procedures. After each change in flow rate or gate level, data should only be recorded after the operating parameters have reached the specified stable state; if a stop condition occurs, the system should be restored to the confirmed safe state, and field hard interlocks should not be exceeded in order to obtain boundary data.

[0046] 2. Monotonic treatment, interpolation, and safety margin of hydraulic safety boundary For a given pump set operating combination, inlet geometry configuration, and candidate gate configuration, assume the flow node satisfies Q 1 < Q 2 <…< Q m The original safety boundary value is S* i,1 to S* i,m If duplicate traffic nodes exist, they should be merged, and the larger, safer boundary value should be adopted. To prevent the safety boundary from locally decreasing with increasing traffic due to data fluctuations, the original boundary value should be monotonically corrected using the following formula: S̄ i,j =max{ S* i,k |1≤ k ≤ j}

[0047] when Q j ≤ Q ≤ Q j+1 In this case, candidate gate layers can be determined based on the linear relationship between two adjacent flow nodes. i Boundary flooding depth S lim,i : S lim,i = S̄ i,j +( Q - Q j )·( S̄ i,j+1 - S̄ i,j ) / ( Q j+1 - Q j ).

[0048] Each hydraulic safety boundary data point should specify the method for incorporating the safety margin; if the water level measurement error, gate top elevation error, and boundary identification uncertainty have already been included in the boundary values ​​during the verification phase, no further corrections should be added; if they have not yet been included, a confirmed non-negative correction should be used. ΔS i The required safe flooding depth for the current control cycle is determined by the following formula: S req,i = S lim,i + ΔS i ; If the hydraulic safety boundary data does not specify the method for incorporating the safety margin and does not provide a non-negative correction amount, this data will not be used to determine the automatic increase of the gate top elevation. When the water intake flow rate is higher than the maximum flow rate node covered by the hydraulic safety boundary data, only maintaining or reducing the gate top elevation is allowed, and a prompt to reduce the water intake flow rate or an out-of-range alarm will be output; when the water intake flow rate is lower than the minimum flow rate node, the boundary value corresponding to the minimum flow rate node will be used, or separately verified low-flow hydraulic safety boundary data will be used.

[0049] 3. Security verification of candidate gate layers and determination of target gate layers The process of selecting hydraulic safety boundary data based on candidate gate positions, such as... Figure 3 As shown; the candidate gate security verification process is as follows: Figure 4 As shown; each control cycle reads the permitted door level, maintenance interlock, equipment failure, door slot occupancy, control authority, and actuator readiness status. Candidate door levels only include those with available equipment that can be reached from the current door level in the order of adjacent door levels. For each candidate door level... i Calculate the actual flood depth S i = Z w - Z g,i The required safe flooding depth is determined based on the candidate gate configuration. S req,i .

[0050] The hydraulic safety boundary verification relationship of candidate gate positions, such as Figure 9 As shown; actual flooding depth S i Not less than the required safe flooding depth S req,i If the candidate gate layer meets the safety requirements, then the reason for not meeting the requirements is recorded. After verifying all candidate gate layers, the candidate gate layers that meet the safety requirements and their safety margins are obtained.

[0051] The process for determining the target gate layer and adjacent actions, such as... Figure 5 As shown; when there are candidate door layers that meet the safety conditions, the door layer with the highest door top elevation is selected as the target door layer. n t Target gate layer n t With the current gate layer n cur If they are the same, keep the current gate layer; target gate layer. n t Below the current gate level n curWhen the target door level is higher than the current door level, an adjacent door level can be changed in the direction of lowering the door top elevation. Only when the current door level and the adjacent door level to be reached both meet the safety conditions, and the pump unit is not in the switching process and meets the stability conditions, can a request be made to raise the adjacent door level.

[0052] Stability conditions are given by validated control parameters. For example, during continuous stable observation time. T stab Within this context, the pump unit operation configuration remains unchanged, the upstream water level variation range does not exceed the allowable water level stability value, the water intake flow variation range does not exceed the allowable flow stability value, and the difference between the actual inundation depth to be reached and the required safe inundation depth is not less than the stability margin. H The stability margin is used to prevent the gate layer from oscillating near the critical value, and does not replace the engineering safety margin already included in the hydraulic safety boundary.

[0053] 4. Adjustment of the operation plan when there is no safety door layer The procedure for adjusting the operation plan when there is no safety door layer, such as Figure 6 As shown, the preset pump set-flow adjustment scheme includes at least the pump set operation combination, water intake flow setpoint, the prerequisite equipment conditions required to switch from the current state to the scheme, interlock permission information, and equipment execution status confirmation information. The control system first eliminates schemes that do not meet the on-site interlock conditions or cannot be implemented from the current state, and then sorts them from high to low according to the water intake flow setpoint.

[0054] For each adjustment scheme, the pump set operation combination and water intake flow rate of that scheme are used to select the hydraulic safety boundary corresponding to each candidate gate position and re-verify the safety. The first adjustment scheme that can obtain at least one candidate gate layer that meets the safety conditions is determined as the target operation scheme. Thus, the pump set and flow rate adjustment are not independent of the stacked beam gate control, but are subject to the same hydraulic safety boundary verification of the candidate gate positions.

[0055] When adjusting from the current operating state to the target operating plan, only one pump start / stop or one flow setpoint adjustment is performed per control cycle. After obtaining equipment execution status confirmation information consistent with the control command and confirming that the water level and flow rate have entered a stable range, the control system re-verifies each candidate gate level. If verifiable interlock permission information cannot be obtained, only a suggested adjustment plan and a manual confirmation request are given, without automatically issuing equipment action commands. If all preset adjustment plans fail to achieve a safe gate level, automatic raising of the gate top elevation is prohibited, and a request for flow reduction, pump shutdown, alarm, or manual takeover is output based on the on-site interlocks and equipment availability.

[0056] 5. Input validity, post-action safety verification, and fault safety. Input data must include at least the measured value, data acquisition time, and data quality status information. If abnormal data quality status occurs, the measured value exceeds the range, the data acquisition interval exceeds the allowable value, or the redundant measurement difference exceeds the consistency allowable value, this input will not be used as the basis for automatic control. If no periodic status feedback is received from the communication link for a continuous period of time that reaches the communication interruption judgment threshold, it will be treated as a communication interruption.

[0057] Post-action safety review and anomaly handling procedures, such as Figure 7 As shown, after each operation of the stacked beam gate, water intake flow rate, or pump unit, the control system waits for position feedback or equipment status feedback that matches the control command. Once the water level and flow rate meet stability conditions, the operating parameters are re-acquired, hydraulic safety boundary data is selected again, and candidate gate layers are verified. If no matching feedback is obtained within the specified action time after issuing the control command, it is determined to be an action timeout.

[0058] If a mismatch or failure of hydraulic safety boundary data, invalid input data, inconsistent position feedback, actuator malfunction, communication interruption, or action timeout occurs, the automatic raising of the gate top elevation will be suspended and an alarm will be triggered. At this time, requests to maintain or lower the gate top elevation, reduce the water intake flow, stop the pump, or manually take over the control can be output according to the site conditions, but bypassing the site hard interlock is not allowed; if the system still fails to return to normal after the maximum number of verifications is reached, the automatic control cycle will be terminated.

[0059] 6. Management of Hydraulic Safety Boundary Data Update The updated hydraulic safety boundary data undergoes a series of checks, including field integrity checks, applicability condition consistency checks, flow node sequence checks, safety merging of duplicate nodes, monotonic correction checks, and historical operating condition backcalculations. Only after all checks pass can the data be put into automatic control, and the effective time is recorded and the previous valid version is retained.

[0060] When changes occur in the inlet cross-section, gate slot configuration, trash rack configuration, gate top elevation, or candidate gate position correspondence, a new inlet geometric configuration number or candidate gate position configuration number should be generated, and the hydraulic safety boundary corresponding to the original applicable conditions should be discontinued. If gate slot wear, gate deformation, inlet siltation, or blockage causes the current geometric conditions to exceed the verification range, the original boundary data should not be used for automatic control and should be transferred to the safety handling process.

[0061] 7. Composition and Implementation Method of the Joint Control System for Shore Tower Type Water Intake Stacked Beam Gate and Pump Unit Flow Rate of the Present Invention The relationship between hardware and function in a joint control system, such as Figure 8As shown, the system includes a water level measurement interface, a flow rate measurement interface, a pump set status interface, a gantry gate position feedback interface, an actuator status interface, a hydraulic safety boundary data unit, a joint control unit, a gantry crane control interface, a pump set control interface, and an alarm interface. Each interface can be connected using industrial fieldbus, hard contacts, redundant Ethernet, or a combination thereof, with field hard interlocks remaining independent and effective.

[0062] The state transition relationships in the joint control process, such as Figure 10 As shown, the joint control unit can be implemented using a programmable logic controller, industrial control computer, embedded controller, or distributed control system. The hydraulic safety boundary data unit stores the applicable operating conditions, flow nodes, safety boundary values, safety margin calculation methods, and verification validity status of each hydraulic safety boundary data. The joint control unit selects the corresponding hydraulic safety boundary data according to the candidate gate positions, and completes the safety verification of candidate gate layers, the determination of target gate layers, the adjustment of pump group-flow scheme when there are no safety gate layers, and the safety review after the action.

[0063] Example 1: Determination of Security Gate Layers Based on Real-Time Operating Parameters The following data is for illustrative purposes only and should not be considered as allowable control values ​​for any project. Assume the upstream water level... Z w =102.10 m, zero-floor door top elevation Z b =100.00 m, single-story height h b =0.50 m, candidate gate levels are 0 to 4, pump unit operation combination is as follows P 1 Water intake flow rate Q =9.0 m³ / s. The original safety boundary values ​​for each candidate gate position at flow nodes of 8.0 m³ / s and 10.0 m³ / s are as follows: Level 0 gate position 0.85 m and 1.05 m, Level 1 gate position 0.90 m and 1.10 m, Level 2 gate position 0.95 m and 1.15 m, Level 3 gate position 1.00 m and 1.20 m, Level 4 gate position 1.05 m and 1.25 m; each gate position is further calculated with a non-negative safety correction of 0.05 m.

[0064] After linear interpolation and adding a safety correction, the required safe flooding depths for candidate gate layers 0 to 4 are 1.00 m, 1.05 m, 1.10 m, 1.15 m, and 1.20 m, respectively; the actual flooding depths for each candidate gate layer are 2.10 m, 1.60 m, 1.10 m, 0.60 m, and 0.10 m, respectively; therefore, layers 0, 1, and 2 meet the safety conditions, and the target gate layer is layer 2.

[0065] If the required safe inundation depth of the current gate 0 is mistakenly used for all candidate gates, it will not reflect the changes in local flow conditions of other candidate gates. Under certain water level and flow conditions, gates that actually require a greater safe inundation depth may be misjudged as available. Therefore, using the corresponding hydraulic safety boundary data for each candidate gate can avoid such boundary misuse.

[0066] Example 2: Under current operating conditions, none of the candidate gate layers meet the safety requirements. The aforementioned gate geometry and boundary structure will continue to be used. Assuming the upstream water level drops to 100.80 m and the current water intake flow rate remains at 9.0 m³ / s, the actual inundation depth of gate position 0 is the highest, at 0.80 m, which is still less than its required safe inundation depth of 1.00 m. Therefore, under the current operating conditions, there is no safe gate. Pre-set adjustment scheme. U 1 The water intake flow rate was reduced to 8.0 m³ / s. At this point, the required safe flooding depth for the 0th floor gate was 0.90 m, which still did not meet the requirements; the plan was adjusted. U 2 Reducing the water intake flow rate to 6.0 m³ / s, using a separately validated low flow boundary of 0.70 m with an additional 0.05 m safety correction, the required safe inundation depth is 0.75 m. If the scheme is adjusted... U 2 If the on-site interlocking and equipment execution conditions are met, then the door position on floor 0 meets the safety requirements, and the plan should be adjusted. U 2 This can be identified as the target operating plan.

[0067] The control system first outputs an adjustment to the water intake flow rate. U 2 Upon receiving a control request for a set value, the system obtains confirmation information of the device's execution status that matches the request and, after reaching a stable condition, re-collects operating parameters. Only after re-verifying and confirming that at least one candidate gate layer meets the safety conditions will it be further determined whether to maintain the current gate layer or adjust an adjacent single layer. If boundary data mismatch, abnormal position feedback, or other faults occur after the action, the system will immediately switch to the safety handling procedure.

[0068] Example 3: Method for Establishing Hydraulic Safety Boundaries For a fixed operating combination of pump units, inlet geometric configuration, candidate gate position configuration and flow node, the verification scheme arranges example working conditions sequentially according to the gate top submergence depths of 1.30 m, 1.10 m, 0.90 m and 0.70 m. If the working conditions of 1.30 m and 1.10 m meet all safety criteria, while the working condition of 0.90 m fails to meet the requirements for the first time, 1.10 m is recorded as the original safety boundary value under this operating condition. This example only illustrates the recording principle of "the nearest qualified working condition before the first unqualified working condition", and the specific submergence depth and safety criteria must be determined by the verification data of the target project.

[0069] Embodiment 4: Establishment of safety boundary based on verified engineering data and verification of candidate gate layers This embodiment continues to use the symbols defined in the preceding text. Z w represents the upstream water level, Q represents the water intake flow rate, P represents the operating combination of pump units, M i represents the i-th candidate gate position configuration, Z g,i represents the candidate gate position M i the gate top elevation, S i =Z w −Z g,i represents the actual submergence depth of this candidate gate position, S req,i represents the required safe submergence depth of this candidate gate position under the current pump unit and flow rate conditions. In this embodiment, the specific values of P are directly written as four-pump combination, three-pump combination, two-pump combination and single-pump combination, and no new pump unit numbers are set separately, the meanings of which are shown in the following table: The data in this embodiment are taken from the hydraulic model research data of existing projects, and are not temporarily assumed data for this application. The project name and equipment numbers have been omitted, but the water level, gate top elevation, flow rate, submergence depth and head loss for safety verification are retained. The original data adopts a 1:20 Froude similarity physical model, and a three-dimensional RANS-VOF numerical model is used to supplement the analysis of flow field and head loss; under a set of comparative working conditions at low water level, the average absolute error of the numerical model for 11 flow velocity measuring points is 0.023 m / s, and the maximum absolute relative deviation for 11 pressure head measuring points is 4.92%. The air suction phenomenon directly observed in the physical model is recorded as direct evidence; the boundary of the flow-reducing working condition is mainly based on the numerical results verified by the above comparison, which is recorded as verified numerical evidence, and the two are not expressed in the same way.

[0070] Under the condition that P is a four-pump combination and Q=15.046 m³ / s, the verification working conditions are arranged in descending order of the gate top submergence depth. When surface wrinkles appear but no air suction is recorded, the air entrainment criterion is qualified; when intermittent air suction occurs, the air entrainment criterion is unqualified. The nearest qualified working condition, the first unqualified working condition and the original safety boundary of the four groups of water level - gate top combinations are shown in the following table: The maximum value among the four sets of original boundary values ​​is 3.98 m. Considering the gate layers are arranged at 1.00 m intervals and the boundary identification error, the required safe flooding depth for the four-pump combination to operate at full flow is taken as 4.00 m towards the safe side. This 4.00 m already includes the discrete boundary identification margin of this embodiment, and the same correction amount will not be added again. Each boundary record still indicates the applicable P and M values ​​respectively. i When the imported geometric configuration and Q; the corresponding relationship of door slot, trash rack, horizontal setback, door top shape or door position changes, the original record shall not be used.

[0071] The table below shows the variation ranges of Q and head loss under different pump unit operating combinations and the adopted safe submersion depths. The 4.00 m limit for the four-pump combination is based on two types of evidence: physical model air intake observation and numerical head loss. The limits for the three-pump combination, two-pump combination, and single-pump combination are mainly numerical inferences after comparison with physical models, and the evidence level should be retained in the boundary data unit.

[0072] Candidate gate layer verification uses Z w A set of working conditions with a height of 29.59 m. The top elevation Z of candidate gate configurations M0, M1, M2, and M3. g,i The values ​​are 25.00, 26.00, 27.00, and 28.00 m respectively, therefore the actual inundation depth S i The values ​​are 4.59, 3.59, 2.59, and 1.59 m, respectively. When P is a four-pump combination, S... req,i =4.00 m, only M0 satisfies S i ≥S req,i When the target gate position is M0; and P is a three-pump combination, S req,i =3.00 m, M0 and M1 meet the requirements, so select M1 with the higher gate top elevation; when P is a two-pump combination or a single-pump combination, S req,i =2.00 m, M0, M1, and M2 meet the requirements, so M2, which has the highest gate top elevation, is selected. This shows that the target gate position depends not only on Z... w It also depends on P and Q; each M i First calculate your own S i Then with the corresponding S req,i Compare.

[0073] Example 5: Pump unit with flow rate adjustment closed loop when there is no safety gate Based on low water level conditions, Z w =23.95 m. The gate top elevation Z of the three adjacent candidate gate positions M0, M1, and M2. g,i The values ​​are 20.00, 21.00, and 22.00 m respectively, therefore Si The values ​​are 3.95, 2.95, and 1.95 m, respectively. Currently, P is a four-pump combination, Q = 15.046 m³ / s, and the required safe flooding depth S... req,i =4.00 m. All three candidate gates have S... i req,i The deepest submerged point, M0, is still 0.05 m short, so the system determines that there is no safe gate layer under the current operating conditions and prohibits the automatic raising of the gate top elevation.

[0074] The preset adjustment scheme U1, under the conditions of on-site hard interlock permission, availability of the three-pump combination, and permissible water supply constraints, adjusts P from a four-pump combination to a three-pump combination, and reduces Q from 15.046 m³ / s to 11.285 m³ / s. After adjustment, the S corresponding to the three-pump combination is used. req,i =3.00 m Recheck: The safety margin for M0 is 3.95 − 3.00 = 0.95 m, the safety margin for M1 is 2.95 − 3.00 = −0.05 m, and the safety margin for M2 is 1.95 − 3.00 = −1.05 m. Therefore, U1 can obtain a new safe candidate gate position M0, and M0 is determined as the target gate position; M1 and M2 are still unusable.

[0075] The control system performs a state change only once per control cycle. The system first verifies the prerequisite equipment conditions and interlock permissions required for switching from a four-pump combination to a three-pump combination, and then issues a pump group or flow rate adjustment request; only after receiving pump group status feedback consistent with the command, and within the stable observation time Z... w Only after Q meets the stability condition will Z be re-acquired. w Q and P recalculate each M i S i and S req,i If M0 is rechecked and confirmed to meet the requirements, M0 is maintained. If the measured Q still exceeds the applicable range of the three-pump combination boundary record, the equipment feedback is inconsistent, or the boundary record does not match the current geometric configuration, then U1 should not be considered complete, the system continues to prohibit automatic gate lifting, and outputs a request for flow reduction, pump stoppage, alarm, or manual takeover. This forms a closed loop of "identifying the absence of a safety gate layer—reducing the pump group / flow rate—confirming equipment feedback—rechecking the gate position—backtracking in case of abnormality".

[0076] In this embodiment, the water level, gate top elevation, flow rate, inundation depth, and head loss are all derived from archived engineering verification data and are not randomly generated. The above values ​​are used to illustrate the data correspondence and control steps of this invention; other projects should use the boundary data verified by this project itself and should not directly use the values ​​of this embodiment as permissible operating values.​

Claims

1. A method for joint control of flow rate of a bank-type water intake stacked beam gate and pump unit, characterized in that: Includes the following steps: S1. Collect the upstream water level, water intake flow rate, pump unit operation combination, current number of stacked beam gate layers, current stacked beam gate position configuration, and actuator status of the shore tower type water intake. S2. Determine candidate door layers based on the door layer, the conversion relationship between adjacent door layers, and the status of the actuator, and determine the door top elevation and candidate door position configuration corresponding to each candidate door layer; S3. For each candidate gate layer, according to the pump group operation combination, inlet geometric configuration, candidate gate configuration and water intake flow rate, select hydraulic safety boundary data that matches the applicable conditions from the verified hydraulic safety boundary data. Based on the safe inundation depth corresponding to adjacent flow nodes, perform monotonic correction and interpolation according to the partial safety principle to determine the required safe inundation depth of the candidate gate layer. Take the difference between the upstream water level and the gate top elevation of the candidate gate layer as the actual inundation depth, and determine the candidate gate layers whose actual inundation depth is equal to or greater than the required safe inundation depth as candidate gate layers that meet the safety conditions. S4. When there are candidate door layers that meet the safety conditions, select the door layer with the highest door top elevation as the target door layer. The stacked beam door is adjusted by changing only one adjacent door layer at a time. When there are no candidate door layers that meet the safety conditions, the preset pump group-flow adjustment scheme is checked one by one according to the on-site interlocking conditions. The scheme that can obtain at least one candidate door layer that meets the safety conditions is selected as the target operation scheme. The preset pump set-flow adjustment scheme includes pump set operation combination, water intake flow set value, pre-conditions required for switching from the current operating state to the scheme, interlock permission information, and equipment execution status confirmation information. When adjusting from the current operating state to the target operating scheme, only one pump set start-up / stop or one flow set value adjustment is performed per control cycle. After obtaining the equipment execution status confirmation information and stable operating data that match the control command, each candidate gate layer is re-verified. If verifiable interlock permission information cannot be obtained, only a suggested adjustment scheme and a manual confirmation request are output, and automatic issuance of equipment action commands is prohibited. S5. After each gate, pump group or flow action is completed, obtain equipment execution status confirmation information and stable operation data that match the control command, and re-determine candidate gates that meet the safety conditions and subsequent control measures. S6. In the event of hydraulic safety boundary data mismatch, input data failure, communication interruption, abnormal position feedback, actuator malfunction, or action timeout, automatic raising of the gate top elevation is prohibited, and at least one safety handling request should be output, including maintaining or lowering the gate top elevation, reducing the water intake flow, stopping the pump, alarming, or manual intervention. When the water intake flow is higher than the maximum flow node covered by the hydraulic safety boundary data, raising the gate top elevation using the hydraulic safety boundary data is prohibited, and a request to reduce the water intake flow or an out-of-range alarm should be output. When the water intake flow is lower than the minimum flow node, the safety boundary value corresponding to the minimum flow node should be used, or a separately verified low-flow safety boundary data should be used.

2. The method for joint control of flow rate of the bank tower type water intake stacked beam gate and pump unit according to claim 1, characterized in that: In step S2, the step of determining the top elevation of the candidate door layer is as follows: S2.1 When the single-layer height of each stacked beam door is equal, let the verified zero-layer door top elevation be... Z b Single-layer height is h b Candidate gate layers i The number of layers is n i Then the top elevation of the candidate door layer Z g,i = Z b + n i · h b ; S2.2 When the single-layer height of each stacked beam door is not equal, the top elevation of each candidate door layer confirmed by on-site re-measurement or design verification shall be directly adopted.

3. The method for joint control of flow rate of the bank tower type water intake stacked beam gate and pump unit according to claim 1, characterized in that: In step S3, for the same pump set operating combination, inlet geometry configuration, and candidate gate configuration, the flow nodes are arranged in ascending order. Q 1 to Q m The corresponding original safety boundary value S* i,1 to S* i,m Monotonic corrections are made according to the principle of partial safety, so that the corrected safety boundary value... S̄ i,j It remains constant or increases with increasing flow rate, and is equal to or greater than the corresponding original safety boundary value; The corrected safety boundary value S̄ i,j satisfy S̄ i,j =max{ S* i,k |1≤ k ≤ j Candidate gate layers are determined by linear interpolation between adjacent flow nodes. i Boundary flooding depth S lim,i .

4. The method for joint control of flow rate of the bank tower type water intake stacked beam gate and pump unit according to claim 1, characterized in that: In step S3, the verified hydraulic safety boundary data refers to data established through at least one of the following methods: physical model testing, numerical simulation verified by physical model testing or field measurement data, and controlled field calibration; under the same conditions of pump unit operation combination, inlet geometry configuration, candidate gate configuration, and flow node, verification conditions are arranged in descending order of gate top submersion depth; when a certain condition fails to meet the predetermined safety criteria for the first time, the gate top submersion depth corresponding to the most recent condition that meets all safety criteria is taken as the original safety boundary value; if there is no most recent condition, the hydraulic safety boundary data under that condition is recorded as invalid.

5. The method for joint control of flow rate of the bank tower type water intake stacked beam gate and pump unit according to claim 4, characterized in that: The safety criteria include at least two of the following: air entrainment criterion, local flow velocity at the top of the gate criterion, and comprehensive head loss criterion; the detection methods and allowable values ​​of each safety criterion are determined by the verification scheme of the target project, and the verification conditions are deemed qualified only when all the safety criteria used meet the requirements.

6. The method for joint control of flow rate of the bank tower type water intake stacked beam gate and pump unit according to claim 1, characterized in that: In step S3, the method for including the safety margin in each of the hydraulic safety boundary data is specified: if the water level measurement error, gate top elevation error, and boundary identification uncertainty have already been included in the safety boundary value during the verification stage, no further correction will be added; if not included, the boundary inundation depth... S lim,i Add confirmed non-negative correction amount to the basis. ΔS i To obtain the required safe flooding depth S req,i ; The method for calculating the safety margin was not specified, and the non-negative correction amount was not given. ΔS i When the boundary data is not used for automatic gate lifting judgment, the boundary data will not be used. When the inlet section, gate slot configuration, trash rack configuration, gate top elevation, or candidate gate position correspondence changes, resulting in the current operating conditions being inconsistent with the applicable conditions indicated in the hydraulic safety boundary data, the hydraulic safety boundary data will be stopped.

7. A combined control system for the flow rate of a shore-tower type water intake stacked beam gate and pump set, characterized in that, The system includes a water level measurement interface, a flow rate measurement interface, a pump set status interface, a stacked beam gate position feedback interface, an actuator status interface, a hydraulic safety boundary data unit, a joint control unit, a gantry crane control interface, a pump set control interface, and an alarm interface. The hydraulic safety boundary data unit stores verified hydraulic safety boundary data, and each hydraulic safety boundary data indicates the applicable pump set operation combination, inlet geometry configuration, candidate gate position configuration, and flow rate node. The joint control unit is connected to the water level measurement interface, flow rate measurement interface, pump set status interface, stacked beam gate position feedback interface, and actuator status interface, and outputs control signals or safety handling requests through the gantry crane control interface, pump set control interface, and alarm interface. The joint control unit is configured to perform each step of the joint control method for the stacked beam gate and pump set flow rate of the shore tower type water intake according to any one of claims 1 to 6.

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