Control method and system for mid-lift pumping station

Abstract

The present application relates to sewage treatment technical field, especially to a kind of control method and system of midway lifting pump station, method includes the following steps: determining pipe network storage capacity, set boundary parameter;Install monitoring instrument and collect data;Data processing, specifically: according to the data obtained by collection set control liquid level difference, according to control liquid level difference whether to take control action;Judge the control mode of midway lifting pump station and control;The control mode includes: liquid level control mode, pressure control mode, drainage mode and forced protection mode.The present application can switch control mode according to the state of midway lifting pump station, pipe network and main pipe, realize the automatic control of midway lifting pump station, ensure that midway lifting pump station is efficiently and stably and safely operated, solve the problem that most of existing midway lifting pump station adopts artificial experience control, and there is not in time and pipeline safety problem.

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 mid-course booster pump station. Background Technology

[0002] The overall layout of urban drainage systems can be categorized into orthogonal, interception, parallel, and zoned types. Interception, a common layout, typically involves laying main pipes along riverbanks and intercepting rainwater and sewage from each branch pipe, sending it to a sewage treatment plant or primary enhanced treatment facility. Considering practical engineering constraints and economic factors, intermediate booster pumping stations are often needed to lift rainwater and sewage into the main pipe when connecting branch pipes to the main pipe due to inconsistent elevations. Therefore, the operation of these intermediate booster pumping stations presents significant challenges. They must not only promptly discharge rainwater and sewage from their catchment areas to prevent flooding, but also ensure the safety of the main pipe while minimizing overflow to meet environmental requirements.

[0003] Intermediate booster pumping stations typically consist of multiple booster pumps, drainage pumps, collection tanks, screens, and auxiliary rooms. Due to land use and construction cost constraints, the collection tank volume is generally small (standards require it to be no less than the output of the largest pump for 30 seconds), resulting in very limited storage capacity. Furthermore, the pumping station's inflow can change rapidly due to the irregular dynamic changes in the drainage network. Simultaneously, the pumping station's output is limited by the fullness of the main pipeline. If the main pipeline is at full capacity and the booster pumps continue to input water, there are risks such as pipe bursts, booster pump damage, and water hammer in the pipeline, seriously endangering the lives and property of the public.

[0004] Currently, most intermediate booster pumping stations rely on manual experience for control. The automatic control system only sets the minimum and maximum forced shutdown levels in the collection tank. Station operators must constantly monitor the levels of flood-prone areas, collection tanks, and main pipelines within the catchment area managed by the intermediate booster pumping station. Based on experience, they determine the number and frequency of booster pumps in operation and whether drainage pumps need to be activated to achieve the goals of preventing urban flooding, minimizing pump station overflows, and ensuring safe operation of the main pipeline. However, when water inflow increases rapidly, manual experience-based control often leads to problems such as delayed responses, frequent pump starts and stops, main pipeline bursts, and water hammer. Alternatively, to avoid these problems, large amounts of rainwater and sewage may overflow through drainage pumps, causing water pollution.

[0005] In addition, the control of the intermediate booster pump station uses real-time collected liquid level data input. However, due to factors such as floating objects in the collection tank, changes in water inflow, and changes in the operating status of the pumps, 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.

[0006] Therefore, it is necessary to provide a new control method for intermediate booster pump stations to solve the above-mentioned technical problems. Summary of the Invention

[0007] The main objective of this invention is to provide a control method and system for intermediate booster pump stations, aiming to solve the problems of untimely response and pipeline safety issues that most existing intermediate booster pump stations rely on manual experience for control.

[0008] To achieve the above objectives, the present invention proposes a control method for intermediate booster pump stations, 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, the gravity flow level of sewage in the pipeline network into the collection tank, and the maximum working pressure that the main pipeline can withstand. S2. Install monitoring instruments and collect data; S3, Data Processing, specifically: Set the control liquid level difference based on the data collected by S2, and determine whether to take control action based on the control liquid level difference; S4. Based on the boundary parameters set in S1, the data collected in S2, and the control liquid level difference set in S3, determine the control mode of the intermediate booster pump station and implement control; the control modes include liquid level control mode, pressure control mode, drainage mode, and forced protection mode.

[0009] A further improvement of the control method for intermediate booster pump stations in this 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. ; Set the maximum working pressure that the main pipeline can withstand. .

[0010] A further improvement of the control method for the intermediate booster pumping station of the present invention is that S2 specifically includes: installing level gauges in the booster pumping station's sump, at each flood-prone point, and in the regulating pipe section to monitor the level of the booster pumping station's sump in real time. Flood-prone areas liquid level and the liquid level of the storage tank section and collect data; Pressure gauges were installed on the main pipeline and the main outlet pipeline of the booster pump to monitor the pressure in the main pipeline in real time. and increase the pressure of the main outlet pipe of the water pump And collect data.

[0011] A further improvement to the control method for the intermediate booster pump station of the present invention is that S3 specifically includes: processing the liquid level data of the booster 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 pump station's sump was 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 S4.

[0012] A further improvement of the control method for the intermediate booster pump station of the present invention is that the judgment condition for the liquid level control mode in S4 is as follows: When the main pipeline pressure Water level in the collection tank Flood-prone areas liquid level And the liquid level in the storage tank section At this time, the liquid level control mode is used; In the liquid level control mode, the target control liquid level of the water collection tank is set to... The control method is fuzzy PID control. The number and frequency of the required lifting pumps are calculated based on the real-time liquid level and liquid level change rate of the collection tank. The influence of flow rate changes is eliminated by using the frequency conversion of the lifting pumps to achieve stable liquid level control.

[0013] A further improvement of the control method for the intermediate booster pump station of the present invention is that the judgment condition for the pressure control mode in S4 is as follows: When the main pipeline pressure Water level in the collection tank Flood-prone areas liquid level And the liquid level in the storage tank section At that time, pressure control mode is used.

[0014] A further improvement of the control method for intermediate booster pump stations in this invention is that the pressure control mode is divided into Mode 1 and Mode 2 based on the main pipeline pressure: Mode 1: When At this point, the target control pressure of the booster pump outlet pipe is set. , For safety factors, the value ranges from 1.1 to 1.3; the control method is fuzzy PID control, which utilizes frequency conversion of the booster pump to eliminate the influence of pressure changes and achieve stable pressure control. Mode 2: When At this point, the frequency of the booster pump with the longest operating time is reduced. The frequency control target is its minimum allowable operating frequency, and the control method is ramp-up control. If the frequency decreases during the process... , For safety, the value is set between 0.6 and 0.9. If this is the case, the booster pump frequency will not be reduced further; otherwise, the booster pump will be shut down once the minimum frequency is reached, and the entire process of Mode Two will be repeated. In pressure control mode, the booster pump's outlet flow rate decreases, while the water levels in the collection tank, regulating pipeline, and flood-prone areas rise.

[0015] A further improvement of the control method for the intermediate booster pumping station of the present invention is that the judgment condition for the drainage mode in S4 is as follows: When the water level in the collection tank is... Or the water level at flood-prone areas Or regulate the liquid level in the storage tank section At that time, the drainage mode is adopted; In drainage mode, the drainage pump is activated, and the target control level of the booster pump station's sump is set to [value missing]. The control method is fuzzy PID control. The number and frequency of drainage pumps are matched according to the real-time liquid level and the rate of change of liquid level. The frequency conversion of drainage pumps is used to quickly reduce the liquid level in the collection tank, thereby reducing the liquid level in flood-prone areas and regulating pipe sections, ensuring that no waterlogging occurs.

[0016] A further improvement of the control method for the intermediate booster pump station of the present invention is that the forced protection mode in S4 is divided into a time protection mode and a liquid level protection mode, and the judgment conditions are as follows: Time protection mode sets the minimum interval between pump start and stop. In each control 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 the time interval between the start and stop of a single water pump is greater than When necessary, switch modes again; The liquid level protection mode is based on the set minimum protection liquid level of the water pump in the collection tank. When the water collection tank reaches the minimum protection level When this happens, all water pumps will be shut down.

[0017] In addition, the present invention also provides a control system for an intermediate booster pumping station, and a control method for operating the intermediate booster pumping station as described above, comprising: The simulation module is used to build a pipeline network model, determine the pipeline network's storage capacity, 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 pressure of the outlet pipe and main 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 intermediate booster pump station should operate in liquid level control mode, pressure control mode, drainage mode or forced protection mode based on the data obtained from the simulation module, acquisition module and data processing module, and to issue instructions. The control module is used to receive instructions from the algorithm module and control the operation of the water pump.

[0018] The technical solution of the present invention has the following beneficial effects: The control method for intermediate booster pump stations provided by this invention can switch control modes in real time according to the status of the intermediate booster pump station, pipeline network, and main pipeline. During sunny days or light rain, the pump station's inflow is stable, the pipeline network and flood-prone areas have low water levels, and the main pipeline is not at full flow. In this case, a level control mode is used to ensure stable operation of the intermediate booster pump station's collection tank at a relatively high level, achieving energy saving and consumption reduction. During moderate or heavy rain, the pump station's inflow increases rapidly, and the main pipeline reaches full flow. In this case, a pressure control mode should be used, and the need to activate the drainage mode is determined based on the water levels in the collection tank and pipeline network. The pressure control mode is further divided into Mode 1 and Mode 2 based on the pressure status of the main pipeline, achieving stable pressure control of the main pipeline, ensuring the safe operation of the pipeline and booster pumps, and fully utilizing the storage space of the collection tank and pipeline to reduce overflow pollution. The drainage mode is used when the collection tank, pipeline network, or flood-prone areas reach their highest water levels, at which point the storage space of the collection tank and pipeline is fully utilized, ensuring that urban flooding does not occur. Meanwhile, from the perspective of water pump protection, a forced protection mode is set to avoid frequent start-stop of the water pump and to protect the water pump when the liquid level is low. The data processing function eliminates liquid level errors to prevent frequent malfunctions of the water pump. Attached Figure Description

[0019] 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.

[0020] Figure 1 The flowchart of the control method for the intermediate booster pump station of the present invention Figure 1 ; Figure 2 This is a schematic diagram of the liquid level in the control method of the intermediate booster pump station of the present invention; Figure 3 The flowchart of the control method for the intermediate booster pump station of the present invention Figure 2 ; Figure 4 This is a block diagram of the control system for the intermediate booster pump station of the present invention. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] like Figures 1-3 As shown, this invention proposes a control method for a mid-course booster pumping 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, the gravity flow level of sewage in the pipeline network into the collection tank, and the maximum working pressure that the main pipeline can withstand. 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 pumping station area, professional pipeline 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, a pipeline network with a certain storage capacity is obtained. Sections and all flood-prone areas The highest liquid level when the pipeline network is operating safely without flooding is [number] units. The highest liquid level at flood-prone areas is And at this time, the highest liquid level in the collection tank is ; like Figure 2 As shown, the minimum protection level for the water pump in the collection tank is set. The gravity flow level of sewage from the pipe network into the collection tank. ; Water level protection for water pump in collection tank 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.

[0027] Set the maximum working pressure that the main pipeline can withstand. It is determined by the minimum safe working pressure that the pipe or fitting can withstand.

[0028] S2. Install monitoring instruments and collect data; specifically including: installing level gauges in the water collection tank of the booster pump station, as well as at various flood-prone points and the regulating pipe section, to monitor the water level in the water collection tank of the booster pump station in real time. Flood-prone areas liquid level and the liquid level of the storage tank section and collect data; Pressure gauges were installed on the main pipeline and the main outlet pipeline of the booster pump to monitor the pressure in the main pipeline in real time. and increase the pressure of the main outlet pipe of the water pump And collect data.

[0029] The signals of the water level in the booster pump station's collection tank, the pressure of the main pipe and the outlet pipe, as well as the pump operation-related signals are transmitted to the acquisition module through physical connections, while other signals are transmitted to the acquisition module through 4G or 5G networks.

[0030] S3. Data Processing: Due to factors such as floating debris, changes in influent water, and variations 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 operation and affecting pump lifespan. Therefore, data processing is needed to eliminate errors caused by water level fluctuations. This specifically includes: processing the water level data of the booster pump station's collection tank and setting a control cycle. 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 was conducted on historical water level data of the booster pump station's sump, and the data was statistically analyzed according to the control cycle to derive the control cycle. All liquid level differences within the system are controlled by a 35% threshold. 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 according to... Enter the input control module and proceed to S4.

[0031] S4. Based on the boundary parameters set in S1, the data collected in S2, and the control liquid level difference set in S3, determine and control the intermediate booster pump station; the control modes include: liquid level control mode, pressure control mode, drainage mode, and forced protection mode. Figure 3 As shown.

[0032] S401: Determine the liquid level in the water collection tank and Size.

[0033] S402: If the water level in the collection tank is... If this occurs, the pump station enters the liquid level protection mode within the forced protection mode, and all water pumps are shut down.

[0034] S403: If the water level in the collection tank is... Then determine the pressure of the main pipeline. Is it equal to zero?

[0035] S404: If the main pipeline pressure In this case, the liquid level control mode is adopted, and the target control liquid level of the collection tank is set to [value missing]. The control method is fuzzy PID control. The required number and frequency of the booster pumps are calculated based on the real-time liquid level and its rate of change. The booster pumps utilize frequency conversion to eliminate the influence of flow rate changes, achieving stable liquid level control. Since the liquid level in the collection tank is stably controlled at this point... Water in the pipe network can flow in by gravity, and the water level at flood-prone points is low. It must be less than Liquid level in the storage tank section It must be less than .

[0036] S405: If the main pipeline pressure Not equal to zero, meaning the pressure is greater than zero (assuming the main pipeline has a negative pressure elimination device installed, and the main pipeline pressure is always...). Then determine the liquid level. and , and and and Size.

[0037] S406: If , and If the pressure is high, then pressure control mode is used; otherwise, enter S410.

[0038] S407: Pressure control modes are further divided into Mode 1 and Mode 2 based on the pipeline pressure; determining the main pipeline... and Size.

[0039] S408: If Then enter mode one, at which point the target control pressure of the booster pump outlet pipe is set. , The safety factor ranges from 1.1 to 1.3 and can be determined based on the safety requirements of the example. The control method is fuzzy PID control, which utilizes frequency conversion of the pump to eliminate the influence of pressure changes and achieve stable pressure control.

[0040] S409: If Then, it enters mode two. In this mode, the frequency of the booster pump with the longest running time is reduced. The frequency control target is its minimum allowable operating frequency, and the control method is ramp-up control. If the frequency decreases during... , For safety, the value range is 0.6~0.9. If so, the frequency of the booster pump will not be reduced. Otherwise, the booster pump will be shut down after the minimum frequency is reached, and S409 will be repeated.

[0041] S410: If , or When this happens, an instruction is issued to require the pumping station to enter drainage mode.

[0042] At this time, the drainage pump starts, and the target control level of the collection tank is set to [value missing]. The control method is fuzzy PID control. The number and frequency of drainage pumps are matched according to the real-time liquid level and the rate of change of liquid level. The frequency conversion of drainage pumps is used to quickly reduce the liquid level in the collection tank, thereby reducing the liquid level in flood-prone areas and regulating pipe sections, ensuring that no waterlogging occurs.

[0043] S411: The algorithm module issues control commands to the water pump based on the selected mode and real-time data. At this point, it needs to determine the time interval between the start and stop of a single water pump. The size of the pump is determined based on its own performance, setting the minimum start-stop interval. The duration is typically 30-60 seconds.

[0044] If the time interval between the start and stop of a single water pump is less than If the forced protection mode is activated, the time protection mode will be activated. In this mode, 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 the time interval between the start and stop of a single water pump is greater than If necessary, switch back to another mode.

[0045] S412: 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.

[0046] The present invention first confirms the storage capacity of the pipeline network, then installs monitoring instruments and collects data, then processes the data, and then uses the processed data to determine which mode the intermediate booster pump station should operate in, namely, liquid level control mode, pressure control mode, drainage mode and forced protection mode.

[0047] On sunny days or during light rain, the pumping station's water intake is stable. When the acquisition module detects low water levels in the pipe network and flood-prone areas, and the main pipe is not in a full-flow state with zero pressure, a liquid level control mode is adopted. At this time, the control objective is to ensure that the intermediate booster pumping station operates stably at a higher water level and to lift all rainwater and sewage into the main pipe and then transport it to the sewage treatment plant for treatment.

[0048] During moderate or heavy rain, the pumping station's inflow increases rapidly. Monitoring by the data acquisition module indicates that the main pipe is at full capacity, while the collection tank, pipe network, and flood-prone areas have not yet reached their maximum water levels. In this situation, a pressure control mode is activated, divided into Mode 1 and Mode 2 based on the main pipe pressure. This ensures that the pressure at the lift pump's outlet pipe exceeds the main pipe pressure, guaranteeing that rainwater and sewage can be pumped to the main pipe and achieving stable pressure control. This prevents pipe bursts and pump damage due to excessive pressure. This mode also fully utilizes the storage capacity of the collection tank and pipelines, reducing overflow pollution.

[0049] The control objective of the drainage mode is to ensure that the pipe network and pumping stations do not experience flooding. Especially during heavy rain or torrential rain, when the inflow of water increases significantly and the liquid level rises rapidly, the data acquisition module will monitor that the main pipeline's delivery capacity has reached its limit. It is necessary to start the drainage pumps in time to avoid flooding and protect the lives and property of the people.

[0050] Meanwhile, from the perspective of water pump protection, a forced protection mode is set to avoid frequent start-stop of the water pump and to protect the water pump when the liquid level is low. The data processing function eliminates liquid level errors to prevent frequent malfunctions of the water pump.

[0051] In addition, such as Figure 4 As shown, the present invention also provides a control system for an intermediate booster pumping station, and a control method for operating the intermediate booster pumping station as described above, comprising: The simulation module is used to build a pipeline network model, determine the pipeline network's storage capacity, 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 pressure of the outlet pipe and main 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 intermediate booster pump station should operate in liquid level control mode, pressure control mode, drainage mode or forced protection mode based on the data obtained from the simulation module, acquisition module and data processing module, and to issue instructions. The control module is used to receive instructions from the algorithm module and control the operation of the water pump.

[0052] A combined sewer system area has one main pipeline and eight intermediate booster pump stations. In 2023, all intermediate booster pump stations operated at a fixed frequency, with the booster pumps starting at high liquid levels and stopping at low liquid levels. This resulted in significant fluctuations in the sump level and frequent pump starts and stops. Drainage pumps were started or stopped by station operators based on monitoring of flood-prone areas. To prevent flooding and ensure the safe operation of the main pipeline, operators typically started the drainage pumps at the beginning of rainfall, leading to large overflows of rainwater and sewage. Starting in 2024, all pump stations adopted the intermediate booster pump station control method and system. Table 1 shows the average energy consumption of the booster pumps, the average daily number of booster pump starts, and the total annual drainage volume before and after the application.

[0053] Table 1 Comparison of Control Methods and Systems Before and After Application at Intermediate Booster Pump Stations

[0054] As shown in Table 1, during sunny or light rainy days, a level control mode was used, employing fuzzy PID control to boost the pump and stabilize the water level in the collection tank at a higher level. During moderate and heavy rain, a pressure control mode fully utilized the pipeline network space to maintain the water level in the collection tank at a high level. The average energy consumption of the booster pump at the pumping station decreased from 0.043 kW·h / m 3 Decreased to 0.034 kWh / m 3 This represents a 21% reduction, demonstrating significant energy conservation and consumption reduction. Thanks to the data processing capabilities and the stable liquid level control and pressure control modes, combined with the forced protection mode, the average daily start-up frequency of the booster pump decreased from 2.3 times to 0.4 times, a reduction of 82.6%, effectively ensuring pump safety. Because the pressure control mode fully utilizes the pipeline storage capacity, in 2024, under the premise of no flooding in the area, the annual total drainage volume decreased from 986,000 cubic meters to 645,000 cubic meters, a reduction of 34.6%, significantly reducing overflow pollution and protecting water environment safety.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, 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 mid-course booster pumping 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, the gravity flow level of sewage in the pipeline network into the collection tank, and the maximum working pressure that the main pipeline can withstand. S2. Install monitoring instruments and collect data; S3, Data Processing, specifically: Set the control liquid level difference based on the data collected by S2, and determine whether to take control action based on the control liquid level difference; S4. Based on the boundary parameters set in S1, the data collected in S2, and the control liquid level difference set in S3, determine the control mode of the intermediate booster pump station and implement control; the control modes include: liquid level control mode, pressure control mode, drainage mode, and forced protection mode.

2. The control method for the intermediate booster pump station 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 the highest liquid level in the collection tank is ; Set the minimum protection level for the water pump in the collection tank. The gravity flow level of sewage from the pipe network into the collection tank. ; Set the maximum working pressure that the main pipeline can withstand. .

3. The control method for the intermediate booster pump station according to claim 2, characterized in that, S2 specifically includes: installing level gauges in the water collection tank of the booster pump station, as well as at various flood-prone points and the regulating pipe section, to monitor the water level in the water collection tank of the booster pump station in real time. Flood-prone areas liquid level and the liquid level of the storage tank section and collect data; Pressure gauges were installed on the main pipeline and the main outlet pipeline of the booster pump to monitor the pressure in the main pipeline in real time. and increase the pressure of the main outlet pipe of the water pump And collect data.

4. The control method for the intermediate booster pump station according to claim 3, characterized in that, S3 specifically includes: processing the liquid level data of the booster 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 pump station's sump was 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 S4.

5. The control method for the intermediate booster pump station according to claim 4, characterized in that, The conditions for determining the liquid level control mode in S4 are as follows: When the main pipeline pressure Water level in the collection tank Flood-prone areas liquid level And the liquid level in the storage tank section At this time, the liquid level control mode is used; In the liquid level control mode, the target control liquid level of the water collection tank is set to... The control method is fuzzy PID control, which calculates the required number and frequency of booster pumps based on the real-time liquid level and liquid level change rate of the collection tank.

6. The control method for the intermediate booster pump station according to claim 5, characterized in that, The conditions for determining the pressure control mode in S4 are as follows: When the main pipeline pressure Water level in the collection tank Flood-prone areas liquid level And the liquid level in the storage tank section At that time, pressure control mode is used.

7. The control method for the intermediate booster pump station according to claim 6, characterized in that, Based on the main pipeline pressure, the pressure control mode is divided into Mode 1 and Mode 2: Mode 1: When At this point, the target control pressure of the booster pump outlet pipe is set. , To ensure safety, the control method is fuzzy PID control. Mode 2: When At this point, the frequency of the booster pump with the longest operating time is reduced. The frequency control target is its minimum allowable operating frequency, and the control method is ramp-up control. If the frequency decreases during the process... , For safety reasons, the frequency of the booster pump will not be reduced further; otherwise, the booster pump will be shut down after the minimum frequency is reached, and the entire process of mode two will be repeated.

8. The control method for the intermediate booster pump station according to claim 7, characterized in that, The conditions for determining the drainage mode in S4 are as follows: When the water level in the collection tank is... Or the water level at flood-prone areas Or regulate the liquid level in the storage tank section At that time, the drainage mode is adopted; In drainage mode, the drainage pump is activated, and the target control level of the booster pump station's sump is set to [value missing]. The control method is fuzzy PID control, which matches the number and frequency of drainage pumps based on the real-time liquid level and the rate of change of liquid level.

9. The control method for an intermediate booster pump station according to claim 8, characterized in that, S4's forced protection mode is divided into time protection mode and liquid level protection mode, with the following judgment conditions: Time protection mode sets the minimum interval between pump start and stop. In each control 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 the time interval between the start and stop of a single water pump is greater than When necessary, switch modes again; The liquid level protection mode is based on the set minimum protection liquid level of the water pump in the collection tank. When the water collection tank reaches the minimum protection level When this happens, all water pumps will be shut down.

10. A control system for a mid-course booster pump station, characterized in that, The control method for operating the intermediate booster pumping station as described in any one of claims 1-9 includes: The simulation module is used to build a pipeline network model, determine the pipeline network's storage capacity, 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 pressure of the outlet pipe and main 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 intermediate booster pump station should operate in liquid level control mode, pressure control mode, drainage mode or forced protection mode based on the data obtained from the simulation module, acquisition module and data processing module, and to issue instructions. The control module is used to receive instructions from the algorithm module and control the operation of the water pump.

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