Terminal elevation pump station control method and system

Abstract

This invention relates to the field of wastewater treatment technology, and in particular to a control method and system for a terminal booster pump station. The method includes the following steps: determining the storage capacity of the pipeline network, determining the optimal operating scheme for the wastewater treatment plant under different flow rates, and setting boundary parameters; installing monitoring instruments and collecting data; data processing; determining and controlling the terminal booster pump station; the control modes include: stable liquid level mode, stable flow rate mode, protective liquid level mode, and forced protection mode. This invention can flexibly switch the control mode according to the influent status of the terminal booster pump station, realizing automated control of the terminal booster pump station, ensuring efficient, stable, and safe operation of the terminal booster pump station, and solving the problem that existing automatic control of terminal booster pump stations cannot avoid frequent pump start-stop.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a control method and system for a terminal booster pump station. Background Technology

[0002] Urban sewage is typically collected through drainage pipe networks and then pumped to sewage treatment plants by booster pump stations. As the end point of the drainage pipe network and the beginning point of the sewage treatment plant, the booster pump station must achieve both reasonable level control to allow water to flow into the drainage pipe network by gravity without overflow, and reasonable flow control to ensure the stable operation of subsequent treatment units at the sewage treatment plant.

[0003] Terminal booster pumping stations typically consist of pumps, a collection tank, a screen, and auxiliary rooms. Due to limitations in land use and construction costs, the collection tank is generally small, resulting in very limited storage capacity. Furthermore, the inflow to the pumping station can change rapidly due to the irregular and dynamic changes in the drainage network.

[0004] Currently, the automatic control of terminal booster pump stations mostly adopts two methods: One method is level-based control, where the pumping station controls the corresponding pumps using an on / off mode based on multiple pre-set water level levels in the collection tanks, thereby controlling the water level and flow rate. This control method results in a large difference between the upper and lower limits of the water level in the collection tanks, a low average operating water level, and high energy consumption. Furthermore, fluctuations in the inflow can easily cause frequent pump starts and stops. The "Outdoor Drainage Design Standard" (GB50014-2021) requires that when the pump unit is automatically controlled, the pumps should not be started more than 6 times per hour. The flow rate fluctuates dramatically within a short period based on the number of pumps activated, exacerbating the impact on subsequent water loads and affecting the control and operation of subsequent treatment units.

[0005] Another method employs PID (Proportional-Integral-Derivative) control, comparing the real-time water level in the collection tank with the target level. The deviation between the two is calculated using PID control, and the result is converted into a control signal sent to the water pump to control its start / stop and frequency, ensuring that the inflow and outflow from the collection tank are equal. This control method uses pump frequency conversion to offset fluctuations in inflow within a certain range, reducing the number of pump start / stop cycles and stabilizing the water level compared to graded level control. However, when inflow fluctuations are large, frequent pump start / stop cycles cannot be avoided, and the large changes in pump outflow can create impact loads on subsequent treatment units in the wastewater treatment plant.

[0006] In addition, the control of the terminal booster pump station uses real-time collected liquid level data as input. However, due to factors such as floating objects in the collection tank, changes in water inflow, and changes in pump operating status, the liquid level in the collection tank is in a fluctuating state. Using instantaneous values ​​as control input parameters results in large errors, causing frequent malfunctions of the pumps and affecting their service life.

[0007] Therefore, it is necessary to provide a new control method for the terminal booster pump station to solve the above-mentioned technical problems. Summary of the Invention

[0008] The main objective of this invention is to provide a control method and system for terminal booster pump stations, which aims to solve the problem that existing automatic control systems for terminal booster pump stations cannot avoid frequent pump start-ups and shutdowns.

[0009] To achieve the above objectives, the present invention proposes a terminal booster pump station control method, comprising the following steps: S1. Determine the storage capacity of the pipeline network and set boundary parameters, specifically: set the minimum protection level of the water pump in the collection tank and the gravity flow level of sewage in the pipeline network into the collection tank. S2. Determine the optimal operating scheme for the wastewater treatment plant under different flow rates and set boundary parameters. Specifically, set the optimal operating schemes for normal influent flow rate and large influent flow rate as normal flow rate mode and large flow rate mode. S3. Install monitoring instruments and collect data; S4. Data processing, specifically: setting the control liquid level difference based on the data collected in S3, and determining whether to take control action based on the control liquid level difference; S5. Based on the boundary parameters set in S1, the boundary parameters set in S2, the data collected in S3, and the control liquid level difference set in S4, determine the control mode of the endpoint booster pump station and perform control; the control modes include: stable liquid level mode, stable flow mode, protective liquid level mode, and forced protection mode.

[0010] A further improvement of the endpoint booster pump station control method of the present invention is that S1 specifically includes: obtaining a pipeline with a storage capacity in the pipeline network. Sections and all flood-prone areas The highest liquid level when the pipeline network is operating safely without flooding is [number]. The highest liquid level at flood-prone areas is And at this time, the highest liquid level in the collection tank is ; Set the minimum protection level for the water pump in the water collection tank. The gravity flow level of sewage from the pipe network into the collection tank. .

[0011] A further improvement to the endpoint booster pump station control method of the present invention is that S2 specifically includes: setting the control cycle of the endpoint booster pump station as... ; Establish a process model for the wastewater treatment plant; Simulation experiments were conducted based on the established process model to obtain the control cycle. Critical flow rate between normal and large influent flow rates within a given time period And the optimal operating schemes under normal and large influent flow rates; The optimal operating schemes for both normal and high influent flow rates are set as normal flow rate mode and high flow rate mode.

[0012] A further improvement to the endpoint booster pump station control method of the present invention is that S3 specifically includes: installing level gauges in the water collection tank, at each flood-prone point, and in the regulating pipe section to monitor the water collection tank in real time. Flood-prone areas liquid level and the liquid level of the storage tank section and collect data; Install a flow meter on the main outlet pipe of the water pump to monitor and control the cycle in real time. Internal water pump outlet flow rate And collect data.

[0013] A further improvement to the endpoint booster pump station control method of the present invention is that S4 specifically includes: processing the real-time liquid level data of the pump station's collection tank, and setting the control cycle as... The liquid level data of all water collection tanks during the control cycle are as follows: , , ... ; Statistical analysis of historical water level data in the collection tank is used to determine the control cycle. All internal liquid level differences are set to control the liquid level difference as follows: The value ranges from the 30th to the 50th percentile. like ,or , , ... If no more than 50% of the values ​​are monotonically increasing or monotonically decreasing, no control action will be taken. like ,and , , ... If more than 50% of the values ​​are monotonically increasing or monotonically decreasing, then proceed to S5.

[0014] A further improvement to the endpoint booster pump station control method of the present invention is that the judgment condition for the stable liquid level mode in S5 is as follows: When control cycle Internal pump station outlet water flow At that time, the terminal booster pump station adopts the stable liquid level mode, while the sewage treatment plant adopts the conventional flow mode; In this mode, the target control level of the water collection tank is set to... The control method is fuzzy PID control. The number of pumps and frequency required to operate are calculated based on the real-time liquid level and liquid level change rate of the collection tank. The pump frequency conversion is used to eliminate the influence of small-range flow changes and achieve stable liquid level control.

[0015] A further improvement to the endpoint booster pump station control method of the present invention is that the judgment condition for the stable flow mode in S5 is as follows: When the pump station outlet water flow rate during the control cycle , , and At that time, the terminal booster pump station switches to stable flow mode, while the sewage treatment plant maintains the normal flow mode; In this mode, the water pump's outlet flow rate is set to... The control method is PID control, which calculates the required number and frequency of pumps to operate based on the real-time flow rate and flow change rate of the outlet pipe, thereby achieving stable flow control. At this time, the water levels in the collection tank, regulating pipe section, and flood-prone areas may rise.

[0016] A further improvement to the endpoint booster pump station control method of the present invention is that the judgment condition for the protection liquid level mode in S5 is as follows: When the pump station outlet water flow rate during the control cycle , or or At this time, the booster pump station switches to the protective liquid level mode, and the sewage treatment plant switches to the high flow mode; in this mode, the target control liquid level of the collection tank is set to... The control method is based on a ramp setting and the water level in the collection tank. During the descent, the water level at flood-prone areas and in the regulating pipe section is constantly monitored. If at a certain moment... and If so, the water level in the collection tank at this moment is set as the target control level.

[0017] A further improvement to the endpoint booster pump station control method of the present invention is that the forced protection mode in S5 is divided into a time protection mode and a liquid level protection mode, and the judgment conditions are as follows: The time protection mode sets the minimum interval between pump start-up and shutdown based on the pump's own performance. In each mode, if the time interval between the start and stop of a single water pump is less than [a certain value], If the forced protection mode is activated, the water pump will remain on at its current operating state and frequency until the water level in the collection tank reaches its limit. , or greater than If necessary, switch to another mode. Liquid level protection mode: When the water collection tank reaches the minimum protection level of the water pump... At that time, all water pumps were shut down.

[0018] The present invention also provides a control system for a terminal booster pumping station, which operates the terminal booster pumping station control method described above, including: The simulation module is used to build pipeline network models and sewage treatment plant models, determine the pipeline network storage capacity and the optimal operating scheme of the sewage treatment plant under different flow rates, and set boundary parameters. The data acquisition module is used to collect data in real time, such as the liquid level of the water collection tank, flood-prone areas and regulating pipelines, the number and frequency of water pumps in operation, and the flow rate of the main outlet pipe. The data processing module is used for storing, processing, judging, and outputting the liquid level data of the collection tank, eliminating errors caused by fluctuations in the liquid level of the collection tank. The algorithm module is used to determine whether the endpoint booster pump station is operating in stable liquid level mode, stable flow mode, protective liquid level mode or forced protection mode, and to determine whether the sewage treatment plant is operating in conventional flow mode or high flow mode, and to issue instructions. The control module receives instructions from the algorithm module and controls the operation of the water pumps at the final booster pump station.

[0019] The technical solution of the present invention has the following beneficial effects: The endpoint booster pump station control method provided by this invention can flexibly switch control modes according to the influent status of the endpoint booster pump station. When the influent flow is stable, a stable liquid level mode is adopted to maintain the pump station liquid level at a stable and high position, while issuing instructions to the sewage treatment plant to operate in normal mode, achieving energy saving and consumption reduction for both the pump station and the sewage treatment plant. When the influent flow fluctuates drastically, a stable flow mode is adopted to make full use of the storage capacity of the collection tank and pipeline section, reducing the impact of water flow changes on the sewage treatment plant. When the water level reaches the limit after the storage capacity of the collection tank and pipeline section is fully utilized, the booster pump station adopts a protective liquid level mode, while the sewage treatment plant switches to a high flow mode to avoid sewage overflow. From the perspective of pump protection, a forced protection mode is set to avoid frequent pump start-stop and low liquid level protection of the pump. The data processing function eliminates liquid level errors to avoid pump malfunction. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 The flow chart of the end-point booster pump station control method of the present invention Figure 1 ; Figure 2 The flow chart of the end-point booster pump station control method of the present invention Figure 2 ; Figure 3 This is a schematic diagram of the liquid level in the final booster pump station control method of the present invention; Figure 4 This is a block diagram of the control system for the booster pump station, which is the endpoint of this invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0024] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0027] like Figures 1-3 As shown, this invention proposes a control method for a terminal booster pump station, comprising the following steps: S1. Determine the storage capacity of the pipeline network and set boundary parameters, specifically: set the minimum protection level of the water pump in the collection tank and the gravity flow level of sewage from the pipeline network into the collection tank; this includes: To obtain rainfall data, underlying surface data, pipeline network data, pollution source data, historical flooding points, and design drawings and historical operating data of the booster pump station area, professional pipeline network modeling software such as MIKE, Infoworks, or SWMM is used to construct a pipeline network model. By simulating different rainfall conditions, such as light rain, moderate rain, heavy rain, and torrential rain, and verifying the results with historical data, the pipelines with storage capacity within the network are identified. Sections and all flood-prone areas The highest liquid level when the pipeline network is operating safely without flooding is [number]. The highest liquid level at flood-prone areas is [value missing]. And at this time, the highest liquid level in the collection tank is ; Set the minimum protection level for the water pump in the water collection tank. The gravity flow level of sewage from the pipe network into the collection tank. .like Figure 3 As shown, the water level protection of the water pump in the collection tank is... The maximum liquid level that can be entered by gravity flow is generally set according to the operating requirements of different water pumps. It is determined by the center elevation of the drainage pipe connected to the pumping station.

[0028] S2. Determine the optimal operating scheme for the wastewater treatment plant under different flow rates, and set boundary parameters. Specifically, define the optimal operating schemes for normal influent flow rate and high influent flow rate as normal flow rate mode and high flow rate mode, respectively; this includes: The control cycle of the final booster pump station is set as follows: ; Establish a process model for the wastewater treatment plant: Obtain construction data, historical water quality and quantity data, and operation records of the wastewater treatment plant, and use professional wastewater treatment simulation software such as BioWin, Sumo, or GPS-X to construct a process model of the wastewater treatment plant; The control cycle of the booster pump station is set as follows: The control cycle is generally 5s to 20s, depending on the water intake of the booster pump station and the size of the collection tank. If the water intake fluctuates greatly or the collection tank is small, a shorter control cycle should be selected; otherwise, the control cycle can be increased. Simulation experiments were conducted based on the established process model to obtain the treatment effect of the wastewater treatment plant under different water volume conditions, and the control cycle was determined. Critical flow rate between normal and large influent flow rates within a given time period And the optimal operating schemes under normal and large influent flow rates; The optimal operating schemes for normal and high influent flow rates are set as normal flow mode and high flow mode. In normal flow mode, the sewage treatment plant operates at a low energy consumption level, achieving energy saving and consumption reduction without affecting the subsequent treatment effect of the sewage treatment plant. In high flow mode, the operating parameters are usually at a high energy consumption level. At this time, the sewage treatment plant's treatment capacity increases and the treated water volume increases, keeping the liquid level in the collection tank and pipe network at a low level to ensure that no flooding occurs.

[0029] S3. Install monitoring instruments and collect data: Install level gauges in the water collection tank, at various flood-prone points, and in the regulating pipe section to monitor the water collection tank in real time. Flood-prone areas liquid level and the liquid level of the storage tank section and collect data; Install a flow meter on the main outlet pipe of the water pump to monitor and control the cycle in real time. Internal water pump outlet flow rate And collect data.

[0030] The pump station's water level in the collection tank, the flow rate of the main outlet pipe, and pump operation-related signals are transmitted to the acquisition module via physical connections, while other signals are transmitted to the acquisition module via 4G or 5G networks.

[0031] S4. Data Processing: Due to factors such as floating debris in the collection tank, changes in inflow rate, and changes in pump operating status, the water level in the collection tank fluctuates. Using instantaneous values ​​as control input parameters results in significant errors, causing frequent pump malfunctions and affecting pump lifespan. Therefore, data processing is needed to eliminate the errors caused by water level fluctuations. Specifically, this includes: Data processing is performed on the real-time liquid level data of the pump station's sump, and the control cycle is set to [value missing]. The control cycle is typically 5-20 seconds, determined based on the water inflow situation of the booster pump station and the size of the collection tank. If the water inflow fluctuates significantly or the collection tank is small, a shorter control cycle should be selected; otherwise, the control cycle can be increased. The liquid level data of all collection tanks within the control cycle are collected as follows: , , ... ; Statistical analysis of historical water level data in the collection tank, according to the control cycle Statistical analysis of the data is performed to determine the control cycle. In this embodiment, the level difference of all liquid levels is set to the 35th percentile value. like ,or , , ... If no more than 50% of the values ​​are monotonically increasing or monotonically decreasing, no control action will be taken. like ,and , ... ... If more than 50% of the values ​​are monotonically increasing or monotonically decreasing, then according to the input control module, proceed to S5.

[0032] S5. Based on the boundary parameters set in S1, the boundary parameters set in S2, the data collected in S3, and the control level difference set in S4, determine the control mode of the endpoint booster pump station and implement control; the control modes include: stable level mode, stable flow mode, protective level mode, and forced protection mode. Figure 2 As shown, the specific steps for selecting the mode are as follows: S501: Determine the liquid level in the water collection tank and Size.

[0033] S502: If the water level in the collection tank is... If the command is issued, the terminal booster pump station will be instructed to use the liquid level protection mode in the forced protection mode and shut down all water pumps.

[0034] S503: If the water level in the collection tank is... Then determine the control cycle. Internal pump station outlet water flow Compared with the preset maximum threshold Size.

[0035] S504: If Then, an instruction is issued requiring the final booster pump station to adopt a stable liquid level mode, in which the target control liquid level of the collection tank is set to [value missing]. The control method is fuzzy PID control. The water pump uses frequency conversion to eliminate the influence of small-range fluctuations in flow, ensuring that the liquid level in the pumping station is stable and at a high position.

[0036] S505: If If so, an instruction is issued requiring the wastewater treatment plant to operate in the conventional flow mode.

[0037] S506: If Then judge and , and , and Size.

[0038] S507: If , and When this occurs, an instruction is issued requiring the terminal booster pump station to adopt a stable flow mode; in this mode, the pump outlet flow rate is set to... At this time, the inflow of water to the pumping station will be greater than the outflow, causing the water level in the collection tank, the regulating pipe section and the flood-prone points to rise.

[0039] Simultaneously, step S505 is executed, issuing an instruction requiring the wastewater treatment plant to operate in conventional flow mode.

[0040] S508: If , or When this happens, an instruction is issued requiring the terminal booster pump station to adopt the protective liquid level mode; First, set the target control level of the water collection tank as follows: The control method is based on a ramp setting and the water level in the collection tank. During the descent, the water level at flood-prone areas and in the regulating pipe section is constantly monitored. If at a certain moment... and If so, the water level in the collection tank at this moment is set as the target control level.

[0041] S509: If or or When necessary, an instruction is issued requiring the wastewater treatment plant to operate in high-flow mode.

[0042] S510: After the above steps, a control command is issued to the water pump according to the selected mode. At this time, it is necessary to determine the time interval between the start and stop of a single water pump. Size, minimum start-stop interval of the pump The time is set by the pump's own performance, and is generally 30~60 seconds.

[0043] S511: If the time interval between the start and stop of a single water pump is greater than... If so, a control command is issued to complete the current control cycle.

[0044] like Figure 4 As shown, the present invention also provides a control system for a terminal booster pumping station, which operates the terminal booster pumping station control method described above, including: The simulation module is used to build pipeline network models and sewage treatment plant models, determine the pipeline network storage capacity and the optimal operating scheme of the sewage treatment plant under different flow rates, and set boundary parameters. The data acquisition module is used to collect data in real time, such as the liquid level of the water collection tank, flood-prone areas and regulating pipelines, the number and frequency of water pumps in operation, and the flow rate of the main outlet pipe. The data processing module is used for storing, processing, judging, and outputting the liquid level data of the collection tank, eliminating errors caused by fluctuations in the liquid level of the collection tank. The algorithm module is used to determine whether the endpoint booster pump station is operating in stable liquid level mode, stable flow mode, protective liquid level mode or forced protection mode, and to determine whether the sewage treatment plant is operating in conventional flow mode or high flow mode, and to issue instructions. The control module receives instructions from the algorithm module and controls the operation of the water pumps at the final booster pump station.

[0045] In 2023, the pumps at the terminal booster pump station in a certain area operated with a strategy of starting at high liquid levels and stopping at low liquid levels at a fixed frequency. This resulted in significant fluctuations in the water level in the collection tank and frequent pump start-ups and shutdowns. The wastewater treatment plant relied on experience-based operators for control, which often led to untimely responses during heavy rains due to rapid changes in water volume, resulting in deteriorated effluent quality. Starting in 2024, a new terminal booster pump station control method and system were implemented. Table 1 shows the average energy consumption and daily start-up frequency of the pumps before and after the implementation.

[0046] Table 1. Comparison of control methods and systems for the terminal booster pump station before and after application. The data in the table shows that the stable liquid level mode maintains a stable and relatively high liquid level in the collection tank, while the stable flow mode causes the liquid level in the collection tank to rise. Both of these factors contribute to energy conservation and consumption reduction in the pumping station, reducing the average energy consumption of the pumps from 0.026 kW·h / m³. 3 Decreased to 0.021 kWh / m 3 This represents a 19.2% reduction, demonstrating significant energy-saving and consumption-reducing effects. Thanks to the data processing function and the level stabilization effects of the stable level mode, stable flow mode, and protective level mode, combined with the forced protection mode, the average number of pump starts per day has been reduced from 3.1 times to 0.7 times, a reduction of 77.4%, effectively ensuring pump safety.

[0047] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A control method for a terminal booster pump station, characterized in that, Includes the following steps: S1. Determine the storage capacity of the pipeline network and set boundary parameters, specifically: set the minimum protection level of the water pump in the collection tank and the gravity flow level of sewage in the pipeline network into the collection tank. S2. Determine the optimal operating scheme for the wastewater treatment plant under different flow rates and set boundary parameters. Specifically, set the optimal operating schemes for normal influent flow rate and large influent flow rate as normal flow rate mode and large flow rate mode. S3. Install monitoring instruments and collect data; S4. Data processing, specifically: setting the control liquid level difference based on the data collected in S3, and determining whether to take control action based on the control liquid level difference; S5. Based on the boundary parameters set in S1, the boundary parameters set in S2, the data collected in S3, and the control liquid level difference set in S4, determine the control mode of the endpoint booster pump station and perform control; the control modes include: stable liquid level mode, stable flow mode, protective liquid level mode, and forced protection mode.

2. The terminal booster pump station control method according to claim 1, characterized in that, S1 specifically includes: obtaining pipelines with storage capacity in the pipeline network. Sections and all flood-prone areas The highest liquid level when the pipeline network is operating safely without flooding is [number]. The highest liquid level at flood-prone areas is And at this time, the highest liquid level in the collection tank is ; Set the minimum protection level for the water pump in the water collection tank. The gravity flow level of sewage from the pipe network into the collection tank. .

3. The terminal booster pump station control method according to claim 2, characterized in that, S2 specifically includes: setting the control cycle of the endpoint booster pump station as follows: ; Establish a process model for the wastewater treatment plant; Simulation experiments were conducted based on the established process model to obtain the control cycle. Critical flow rate between normal and large influent flow rates within a given time period And the optimal operating schemes under normal and large influent flow rates; The optimal operating schemes for both normal and high influent flow rates are set as normal flow rate mode and high flow rate mode.

4. The terminal booster pump station control method according to claim 3, characterized in that, S3 specifically includes: installing level gauges in the water collection tank, at various flood-prone points, and in the regulating pipe section to monitor the water collection tank in real time. The water level at the flood-prone points is The liquid level in the storage tank section is and collect data; Install a flow meter on the main outlet pipe of the water pump to monitor and control the cycle in real time. Internal water pump outlet flow rate And collect data.

5. The terminal booster pump station control method according to claim 4, characterized in that, S4 specifically includes: processing real-time liquid level data from the pump station's sump, and setting the control cycle as follows: The liquid level data of all water collection tanks during the control cycle are as follows: , , ... ; Statistical analysis of historical water level data in the collection tank is used to determine the control cycle. All internal liquid level differences are set to control the liquid level difference as follows: The value ranges from the 30th to the 50th percentile. like ,or , , ... If no more than 50% of the values ​​are monotonically increasing or monotonically decreasing, no control action will be taken. like ,and , , ... If more than 50% of the values ​​are monotonically increasing or monotonically decreasing, then proceed to S5.

6. The terminal booster pump station control method according to claim 5, characterized in that, The criteria for determining the stable liquid level mode in S5 are as follows: When control cycle Internal pump station outlet water flow At that time, the terminal booster pump station adopts the stable liquid level mode, while the sewage treatment plant adopts the conventional flow mode; In this mode, the target control level of the water collection tank is set to... The control method is fuzzy PID control, which calculates the required number of pumps and frequency based on the real-time liquid level and liquid level change rate of the collection tank.

7. The terminal booster pump station control method according to claim 6, characterized in that, The criteria for determining stable traffic mode in S5 are as follows: When the pump station outlet water flow rate during the control cycle , , and At that time, the terminal booster pump station switches to stable flow mode, while the sewage treatment plant maintains the normal flow mode; In this mode, the water pump's outlet flow rate is set to... The control method is PID control, which calculates the required number of pumps and frequency based on the real-time flow rate and flow rate change rate of the outlet pipe.

8. The terminal booster pump station control method according to claim 7, characterized in that, The conditions for determining the protection level mode in S5 are as follows: When the pump station outlet water flow rate during the control cycle , or or At this time, the booster pump station switches to the protective liquid level mode, and the sewage treatment plant switches to the high flow mode; in this mode, the target control liquid level of the collection tank is set to... The control method is based on a ramp setting and the water level in the collection tank. During the descent, the water level at flood-prone areas and in the regulating pipe section is constantly monitored. If at a certain moment... and If so, the water level in the collection tank at this moment is set as the target control level.

9. The terminal booster pump station control method according to claim 8, characterized in that, S5's forced protection mode is divided into time protection mode and liquid level protection mode, with the following judgment conditions: The time protection mode sets the minimum interval between pump start-up and shutdown based on the pump's own performance. In each mode, if the time interval between the start and stop of a single water pump is less than [a certain value], If the forced protection mode is activated, the water pump will remain on at its current operating state and frequency until the water level in the collection tank reaches its limit. , or greater than If necessary, switch to another mode. Liquid level protection mode: When the water collection tank reaches the minimum protection level of the water pump... At that time, all water pumps were shut down.

10. A control system for a terminal booster pump station, characterized in that, The terminal booster pump station control method as described in claim 1 includes: The simulation module is used to build pipeline network models and sewage treatment plant models, determine the pipeline network storage capacity and the optimal operating scheme of the sewage treatment plant under different flow rates, and set boundary parameters. The data acquisition module is used to collect data in real time, such as the liquid level of the water collection tank, flood-prone areas and regulating pipelines, the number and frequency of water pumps in operation, and the flow rate of the main outlet pipe. The data processing module is used for storing, processing, judging, and outputting the liquid level data of the collection tank, eliminating errors caused by fluctuations in the liquid level of the collection tank. The algorithm module is used to determine whether the endpoint booster pump station is operating in stable liquid level mode, stable flow mode, protective liquid level mode or forced protection mode, and to determine whether the sewage treatment plant is operating in conventional flow mode or high flow mode, and to issue instructions. The control module receives instructions from the algorithm module and controls the operation of the water pumps at the final booster pump station.

Images