A method for confirming the optimized operation of a water diversion pumping station.

Abstract

This invention discloses a method for confirming optimized operation of a water diversion pumping station, comprising the following steps: S1, acquiring environmental data information and determining whether the environmental data information meets the water diversion conditions; if it does, proceed to S2; otherwise, prohibit water diversion operations; S2, determining whether the average upstream water level change is higher than the average downstream water level change; if yes, proceed to S3; otherwise, proceed to S5; S3, calculating the maximum water diversion volume obtained by opening the gates all day when the gates are set to fully open; S4, extracting the daily target water diversion volume from the water diversion plan and determining whether the maximum water diversion volume of the gates is greater than the daily target water diversion volume; if yes, determining the gate diversion scheme as the final start-up operation scheme; otherwise, determining the gate diversion + pump diversion scheme as the final start-up operation scheme; S5, determining the pump diversion scheme as the final start-up operation scheme. This invention can ensure that the pumping station achieves optimized start-up operation, achieving the goal of energy conservation and emission reduction.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, and in particular to a method for confirming the optimized operation of a water diversion pumping station. Background Technology

[0002] In recent years, the water power industry has developed rapidly in my country. Pumping station projects that divert and regulate water using two methods, namely pump pressurization and gate gravity flow, are increasingly valued by pumping station project management units for their operational stability and efficiency.

[0003] Currently, under the premise of ensuring stable operation, energy conservation and emission reduction have become important indicators for the economic operation of pumping stations. During the operation of a pumping station, the energy consumption of pumps, motors, gates, hoists, etc., constitutes the largest resource consumption equipment in the pumping station project. Scientific control of the operation of such equipment is a key step in achieving energy conservation and emission reduction. However, existing research focuses on the stable and efficient operation of the equipment, without considering the actual water diversion task of the entire pumping station. Therefore, it is urgent to simulate various start-up and operation schemes with the goal of completing the water diversion task of the entire pumping station, and to calculate the energy efficiency of the equipment to achieve a solution aimed at energy conservation and emission reduction. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a method for confirming the optimized operation of a water diversion pumping station. This method not only ensures the pumping station achieves optimized operation and energy conservation and emission reduction, but also reduces safety hazards to pumping station structures and dams caused by unscientific water diversion operation methods.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A method for verifying the optimized operation of a water diversion pumping station includes the following steps:

[0007] S1. Obtain environmental data information and determine whether the environmental data information meets the water diversion conditions. If it does, proceed to step S2. If it does not, prohibit the water diversion operation.

[0008] S2. Based on historical and downstream water level information and the current tidal information, obtain the average value of upstream water level change and the average value of downstream water level change. Determine whether the average value of upstream water level change is higher than the average value of downstream water level change. If yes, proceed to step S3; otherwise, proceed to step S5.

[0009] S3, calculate the maximum water diversion volume obtained by opening the gate throughout the day when the gate is set to fully open;

[0010] S4. Extract the target water diversion volume for the day from the water diversion plan, and determine whether the maximum water diversion volume of the gate sluice is greater than the target water diversion volume for the day. If so, determine the gate sluice scheme as the final start-up operation scheme; otherwise, determine the gate sluice + pump sluice scheme as the final start-up operation scheme.

[0011] S5, determine the pumping scheme as the final start-up and operation scheme.

[0012] Preferably, the environmental data information includes weather and water chlorine content; the preset water diversion conditions are that the weather is not a rainstorm or typhoon and the water chlorine content does not exceed 250 mg / L.

[0013] Preferably, determining the gate-entry scheme as the final start-up and operation scheme includes the following steps:

[0014] When the gate is set to fully open, the gate opening time is calculated based on the target water diversion volume for the day.

[0015] Preferably, determining the gate priming + pump priming scheme as the final start-up and operation scheme includes the following steps:

[0016] Set the gate to the fully open state. When the upstream and downstream water levels are equal, close the gate and record the gate opening time. Calculate the total water diversion volume completed by the gate based on the gate opening time.

[0017] The required water volume for pumping is determined based on the total water volume diverted by the gate and the target water volume for the day.

[0018] The number of pumps to be started is determined based on the health score of the pump unit, and the pump start-up time is determined based on the required priming water volume and the number of pumps to be started.

[0019] Preferably, determining the pumping scheme as the final start-up and operation scheme includes the following steps:

[0020] The number of pumps to be started is determined based on the health score of the pump unit, and the pump start-up time is determined based on the target water intake volume and the number of pumps to be started.

[0021] Preferably, determining the number of water pumps to be operated based on the health score of the water pump unit includes the following steps:

[0022] The monitoring data of vibration, sway, pressure pulsation, stress strain and noise of each pump in the pump unit are collected. The entropy method is used to calculate the weight of the data and obtain the health score of each pump in the pump unit.

[0023] The health scores of each water pump are ranked from highest to lowest, and the top N water pumps are selected as alternatives.

[0024] Preferably, the calculation model for the health score is as follows:

[0025]

[0026] In the formula: B0 is the average value of the maximum vibration value at the measuring point; B1 is the vibration alarm threshold value at the measuring point; w b S0 represents the average value of the maximum swing at the measuring point; S1 represents the alarm threshold value for the swing at the measuring point; w s The weighting ratio is for the swing; P0 is the average value of the maximum pressure pulsation at the measuring point; P1 is the alarm threshold value for pressure pulsation at the measuring point; w p The pressure pulsation weighting ratio; C0 is the average value of the maximum stress at the measuring point; C1 is the stress alarm threshold at the measuring point; w c The stress weighting ratio is used; N0 is the average value of the maximum noise level at the measuring point; N1 is the noise alarm threshold at the measuring point; w n This is the noise weighting ratio.

[0027] Based on the above technical solution, the beneficial effects of this invention are as follows: This invention considers factors such as weather conditions, water chlorine content, and tidal influences, combined with upstream and downstream water level trends. Under the premise of meeting the daily water intake requirements of the pumping station, and with energy conservation and emission reduction as the goal, a mathematical optimization model is established to simulate the operating conditions under both gate-based and pump-based conditions. Through efficiency analysis, the optimal combined operation scheme is derived, maximizing cost savings for the pumping station and achieving the goal of energy conservation and emission reduction through scientific methods. The optimized start-up operation scheme for pumping station units proposed in this invention not only ensures the effective operation of the pumping station and achieves the purpose of energy conservation and emission reduction, but also reduces safety hazards to pumping station structures and dams caused by unscientific water intake operation methods. Attached Figure Description

[0028] Figure 1 This is a flowchart of a method for confirming the optimized operation of a water pumping station in one embodiment. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] like Figure 1 As shown in the figure, this embodiment provides a method for confirming the optimized operation of a water diversion pumping station, including the following steps:

[0031] S1: Obtain environmental data information and determine whether the environmental data information meets the water diversion conditions. If it does, proceed to step S2; otherwise, prohibit the water diversion operation.

[0032] In this embodiment, the environmental data information includes weather and water chlorine content; the preset water diversion conditions are that the weather is not a rainstorm or typhoon and the water chlorine content does not exceed 250mg / L. The weather and water chlorine content data information are obtained from the Internet through the interface before the machine is turned on.

[0033] S2: Based on historical and downstream water level information and the current tidal information, obtain the average value of upstream water level change and the average value of downstream water level change. Determine whether the average value of upstream water level change is higher than the average value of downstream water level change. If yes, proceed to step S3; otherwise, proceed to step S5.

[0034] The gate-opening condition requires a water level difference, meaning the upstream water level must be higher than the downstream water level. In this embodiment, the average upstream water level change and the average downstream water level change are used to more accurately determine whether the current water intake pumping station meets the gate-opening condition.

[0035] The average change in upstream water level is obtained by adding the average upstream water level of the previous three days to the tidal height and surge height of the day; the average change in downstream water level is the average downstream water level of the previous three days, without considering tidal values.

[0036] 1) Gate-start scheme: This scheme is the most energy-efficient because it only consumes energy during the gate opening and closing process. 2) Gate-start + pump-start scheme: This scheme is suitable for situations where gate-starting is insufficient to meet the daily target water volume. A portion of the water is diverted via gate-starting before pump-starting. 3) Pump-start scheme: This scheme is unsuitable for gate-starting and requires full pump-starting. Since pump-starting is a continuous energy-consuming process, it has the highest energy consumption. The start-up energy consumption of the three schemes is ranked as follows:

[0037] Full traction < traction + pump traction < full pump traction

[0038] Therefore, provided that the water diversion task can be completed, the gate diversion scheme should be selected first, followed by the gate diversion + pump diversion scheme; and the pump diversion scheme should be selected last.

[0039] S3, calculate the maximum water diversion volume obtained by opening the gate throughout the day when the gate is set to fully open.

[0040] In this embodiment, calculating the maximum water diversion volume for the day refers to calculating the maximum water diversion volume Q for the day when the gate is fully open. max The calculation formula is as follows:

[0041] Q max =tnQ

[0042] In the formula: t is the gate opening time; n is the number of gates; Q is the flow rate.

[0043] The formula for calculating its flow rate Q is:

[0044]

[0045] in:

[0046]

[0047]

[0048] Where: σ s denoted as , where μ is the orifice flooding coefficient; B2 is the sum of the net widths of the gate orifices; e is the gate opening degree; g is 9.81; h t The downstream water depth; h c H0 represents the conjugate water depth of the contracted section; H0 is the head above the weir, which is obtained by subtracting the bottom elevation of the gate from the upstream water level.

[0049] S4. Extract the target water diversion volume for the day from the water diversion plan, and determine whether the maximum water diversion volume of the gate sluice is greater than the target water diversion volume for the day. If so, determine the gate sluice scheme as the final start-up operation scheme; otherwise, determine the gate sluice + pump sluice scheme as the final start-up operation scheme.

[0050] The daily target water diversion volume of the water diversion pumping station is planned; a certain number of cubic meters of water must be diverted that day. Provided that the gate opening conditions are met and the gate opening can achieve the daily target water diversion volume, then...

[0051] Gate entry scheme:

[0052] When the gate is set to fully open, the gate opening time is calculated based on the target water diversion volume for the day.

[0053] Brake priming + pump priming solution:

[0054] Set the gate to be fully open. When the upstream and downstream water levels are equal, close the gate and manually record the gate opening time. Calculate the total water diversion volume completed by the gate based on the gate opening time.

[0055] The required water volume for pumping is determined based on the total water volume diverted by the gate and the target water volume for the day.

[0056] The number of pumps to be started is determined based on the health score of the pump unit, and the pump start-up time is determined based on the required priming water volume and the number of pumps to be started.

[0057] S5, determine the pumping scheme as the final start-up and operation scheme.

[0058] Pumping plan: The number of pumps to be started is determined based on the health score of the pump unit, and the pump start-up time is determined based on the target water volume for the day and the number of pumps to be started.

[0059] One embodiment of the method for confirming the optimized operation of a water pumping station provides a method for determining the number of pumps to be started based on the health score of the pumping units, including the following steps:

[0060] The monitoring data of vibration, sway, pressure pulsation, stress strain and noise of each pump in the pump unit are collected. The entropy method is used to calculate the weight of the data and obtain the health score of each pump in the pump unit.

[0061] The health scores of each water pump are ranked from highest to lowest, and the top N water pumps are selected as alternatives.

[0062] The calculation model for the health score is as follows:

[0063]

[0064] In the formula: B0 is the average value of the maximum vibration value at the measuring point; B1 is the vibration alarm threshold value at the measuring point; w b S0 represents the average value of the maximum swing at the measuring point; S1 represents the alarm threshold value for the swing at the measuring point; w s The weighting ratio is for the swing; P0 is the average value of the maximum pressure pulsation at the measuring point; P1 is the alarm threshold value for pressure pulsation at the measuring point; w p The pressure pulsation weighting ratio; C0 is the average value of the maximum stress at the measuring point; C1 is the stress alarm threshold at the measuring point; w c The stress weighting ratio is used; N0 is the average value of the maximum noise level at the measuring point; N1 is the noise alarm threshold at the measuring point; w n This is the noise weighting ratio.

[0065] The above description is merely a preferred embodiment of the method for confirming the optimized operation of a water diversion pumping station disclosed in this invention, and is not intended to limit the scope of protection of the embodiments in this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments in this specification should be included within the scope of protection of the embodiments in this specification.

Claims

1. A method for confirming the optimized operation of a water diversion pumping station, characterized in that, Includes the following steps: S1. Obtain environmental data information and determine whether the environmental data information meets the water diversion conditions. If it does, proceed to step S2. If it does not, prohibit the water diversion operation. S2. Based on historical and downstream water level information and the current tidal information, obtain the average value of upstream water level change and the average value of downstream water level change. Determine whether the average value of upstream water level change is higher than the average value of downstream water level change. If yes, proceed to step S3; otherwise, proceed to step S5. S3, calculate the maximum water diversion volume obtained by opening the gate throughout the day when the gate is set to fully open; S4. Extract the target water diversion volume for the day from the water diversion plan, and determine whether the maximum water diversion volume of the gate sluice gate exceeds the target water diversion volume for the day. If so, determine the gate sluice gate scheme as the final start-up operation scheme; if not, determine the gate sluice gate + pump sluice gate scheme as the final start-up operation scheme. The determination of the gate sluice gate + pump sluice gate scheme as the final start-up operation scheme includes the following steps: set the gate to the fully open state, close the gate when the upstream and downstream water levels are equal and record the gate sluice gate opening time, and calculate the total water diversion volume completed by the gate sluice gate based on the gate sluice gate opening time; determine the water diversion volume required by the pump sluice gate based on the total water diversion volume completed by the gate sluice gate and the target water diversion volume for the day; determine the number of pumps to be started based on the health score of the pump unit, and determine the pump start-up time based on the water diversion volume required by the pump sluice gate and the number of pumps to be started. S5, determine the pumping scheme as the final start-up and operation scheme.

2. The method for confirming the optimized operation of a water diversion pumping station according to claim 1, characterized in that, The environmental data includes weather and water chlorine content; the water diversion conditions are that the weather is not a rainstorm or typhoon and the water chlorine content does not exceed 250 mg / L.

3. The method for confirming the optimized operation of a water diversion pumping station according to claim 1, characterized in that, The determination of the gate-entry scheme as the final start-up and operation scheme includes the following steps: When the gate is set to fully open, the gate opening time is calculated based on the target water diversion volume for the day.

4. The method for confirming the optimized operation of a water diversion pumping station according to claim 1, characterized in that, The process of determining the pumping scheme as the final start-up and operation scheme includes the following steps: The number of pumps to be started is determined based on the health score of the pump unit, and the pump start-up time is determined based on the target water intake volume and the number of pumps to be started.

5. A method for confirming the optimized operation of a water diversion pumping station according to claim 1 or 4, characterized in that, The process of determining the number of water pumps to be activated based on the health score of the water pump unit includes the following steps: The monitoring data of vibration, sway, pressure pulsation, stress strain and noise of each pump in the pump unit are collected. The entropy method is used to calculate the weight of the data and obtain the health score of each pump in the pump unit. The health scores of each water pump are ranked from highest to lowest, and the top N water pumps are selected as alternatives.

6. The method for confirming the optimized operation of a water diversion pumping station according to claim 5, characterized in that, The calculation model for the health score is as follows: In the formula: This represents the average value of the maximum vibration values ​​at the measuring points; This is the vibration alarm threshold value for the measuring point; For vibration weighting ratio; This represents the average of the maximum swing values ​​at the measuring points; This is the alarm threshold value for the swing angle at the measuring point; Weighting of swing amplitude; This represents the average value of the maximum pressure pulsation at the measuring point; This refers to the alarm threshold value for pressure pulsation at the measuring point; Weighting of pressure pulsations; This represents the average of the maximum stress values ​​at the measuring points; This is the stress alarm threshold value for the measuring point; Stress weighting ratio; This represents the average of the maximum noise values ​​at each measuring point. This refers to the noise alarm threshold value at the measuring point; This is the noise weighting ratio.

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