A control method and device for pressure conversion and current conversion of a booster pump station

Abstract

The present invention relates to a control method and device for voltage and current conversion of a booster pump station, wherein the method comprises: detecting the real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline, and the real-time instantaneous flow rate of the water outlet; transmitting the collected real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline, and the real-time instantaneous flow rate of the water outlet to a big data platform, the big data platform establishing a water demand data model based on the obtained data, and using the obtained water demand data model to predict the pressure demand value of the water outlet of the unit in the next period with a preset time as a cycle; controlling the unit according to the predicted pressure demand value of the water outlet of the unit in the next period; if there is a sudden change in water demand, correcting the pressure demand value of the water outlet of the unit, and using the corrected pressure demand value of the water outlet of the unit to control the unit. The present invention can achieve the effect of reducing energy consumption while meeting water demand.

Description

Technical Field

[0001] The present invention relates to the technical field of pump station control, and in particular to a method and device for controlling voltage and flow conversion of a booster pump station. Background Art

[0002] In the control system of municipal long-distance transmission booster pump station (such as water plant water supply system, mid-way booster control system), constant pressure water supply is usually adopted, that is, the water supply unit is PID-regulated according to the set target pressure so that the unit outlet water pressure is always maintained at the set target pressure. This control system is the same as the traditional secondary water supply control system; however, the secondary water supply system has a small pipe diameter, a short pipeline length, and a relatively stable water flow demand, so it uses a constant target pressure for control, which can provide very stable water supply. For the municipal booster pump station system for long-distance transmission, the pipeline is thick, the distance is long, the water demand varies greatly, and the pipeline trend has a large drop. If only a constant pressure method is used for control, when the water demand increases, the target water supply cannot be adjusted in time, resulting in insufficient water supply; when the water demand decreases, the target water supply cannot be adjusted in time, and it is easy to cause a waste of unit energy consumption. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a control method and device for voltage and current conversion of a booster pump station, which can reduce energy consumption while meeting water demand.

[0004] The technical solution adopted by the present invention to solve the technical problem is: to provide a control method for pressure conversion and flow conversion of a booster pump station, comprising the following steps:

[0005] Detect the real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet;

[0006] The collected real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline, and the real-time instantaneous flow rate of the water outlet are transmitted to the big data platform. The big data platform establishes a water demand data model based on the obtained data, and uses the obtained water demand data model to predict the pressure demand value of the water outlet of the unit in the next period with a preset time period;

[0007] Control the unit according to the predicted pressure demand value at the water outlet of the unit in the next period;

[0008] If there is a sudden change in water demand, the pressure demand value at the water outlet of the unit is corrected, and the unit is controlled using the corrected pressure demand value at the water outlet of the unit.

[0009] The sudden change in water demand is determined by the following methods:

[0010] Detect the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet;

[0011] Determine whether the pressure at the end of the pipeline continues to increase;

[0012] If the pressure at the end of the pipeline continues to increase, it is further determined whether the real-time instantaneous flow rate of the water outlet continues to decrease;

[0013] If the real-time instantaneous outflow flow rate continues to decrease, it is determined that a sudden drop in water demand occurs.

[0014] The sudden change in water demand is determined by the following methods:

[0015] Detect the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet;

[0016] Determine whether the pressure at the end of the pipeline continues to decrease;

[0017] If the pressure at the end of the pipeline continues to decrease, it is further determined whether the real-time instantaneous flow rate of the water outlet continues to increase;

[0018] If the real-time instantaneous flow rate of the water outlet continues to increase, it is determined that a sudden increase in water demand occurs.

[0019] The correction of the pressure demand value at the water outlet of the unit is specifically as follows:

[0020] When the water demand suddenly drops, reduce a pressure adjustment value based on the predicted pressure demand value, and observe whether the pressure at the end of the pipeline reaches the normal range. If not, continue to reduce the pressure demand value, and when the pressure demand value reaches the low pressure range, increase a pressure adjustment value until the pressure at the end of the pipeline returns to the normal range.

[0021] When there is a sudden increase in water demand, add a pressure adjustment value based on the predicted pressure demand value, and observe whether the pressure at the end of the pipeline reaches the normal range. If not, continue to increase the pressure demand value, and when the pressure at the end of the pipeline continues to increase or the real-time instantaneous flow rate of the water outlet continues to decrease, reduce the pressure adjustment value based on the current pressure demand value until the pressure at the management end returns to the normal range.

[0022] The technical solution adopted by the present invention to solve the technical problem is: to provide a control device for pressure conversion and flow conversion of a booster pump station, comprising:

[0023] The detection module is used to detect the real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet;

[0024] The prediction module is used to transmit the collected real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline, and the real-time instantaneous flow rate of the water outlet to the big data platform. The big data platform establishes a water demand data model based on the obtained data, and uses the obtained water demand data model to predict the pressure demand value of the water outlet of the unit in the next period with a preset time as the cycle;

[0025] A control module, used to control the unit according to the predicted pressure demand value of the water outlet of the unit in the next period;

[0026] The correction module is used to correct the pressure demand value at the water outlet of the unit when a sudden change in water demand occurs, and use the corrected pressure demand value at the water outlet of the unit to control the unit.

[0027] The correction module comprises:

[0028] Detection unit, used to detect the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet;

[0029] A first judgment unit, used to judge whether the pressure at the end of the pipeline continues to increase;

[0030] A second judgment unit is used to further judge whether the real-time instantaneous flow rate of the water outlet continues to decrease when the pressure at the end of the pipeline continues to increase;

[0031] The first determination unit is used to determine that a sudden drop in water demand occurs when the real-time instantaneous flow rate of the water outlet continues to decrease.

[0032] The correction module also includes:

[0033] A third judgment unit is used to judge whether the pressure at the end of the pipeline continues to decrease;

[0034] A fourth judgment unit is used to further judge whether the real-time instantaneous flow rate of the water outlet continues to increase when the pressure at the end of the pipeline continues to decrease;

[0035] The second determination unit is used to determine that a sudden increase in water demand occurs when the real-time instantaneous flow rate of the outflowing water continues to increase.

[0036] When the correction module corrects the pressure demand value at the water outlet of the unit, when there is a sudden drop in water demand, a pressure adjustment value is reduced on the basis of the predicted pressure demand value, and whether the pressure at the end of the pipeline reaches the normal range is observed. If not, the pressure demand value is continued to be reduced, and when the pressure demand value reaches the low pressure range, a pressure adjustment value is increased until the pressure at the end of the pipeline returns to the normal range; when there is a sudden increase in water demand, a pressure adjustment value is added on the basis of the predicted pressure demand value, and whether the pressure at the end of the pipeline reaches the normal range is observed. If not, the pressure demand value is continued to be increased, and when the pressure at the end of the pipeline continues to increase or the real-time instantaneous flow rate of the water outlet continues to decrease, a pressure adjustment value is reduced on the basis of the current pressure demand value until the pressure at the management end returns to the normal range.

[0037] Beneficial Effects

[0038] Due to the adoption of the above-mentioned technical scheme, the present invention has the following advantages and positive effects compared with the prior art: the present invention predicts the target pressure through a water demand model, and corrects the predicted target pressure value according to the actual water demand during the actual water use process, thereby ensuring stable water use while saving energy, thereby achieving the effect of reducing energy consumption while meeting water demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a flow chart of a control method for voltage and current conversion of a booster pump station according to a first embodiment of the present invention. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0041] The first embodiment of the present invention relates to a control method for pressure conversion and flow conversion of a booster pump station, such as Figure 1 As shown, the following steps are included:

[0042] Step 1: Detect the real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline, and the real-time instantaneous flow rate of the water outlet.

[0043] Step 2: The collected real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet are transmitted to the big data platform. The big data platform establishes a water demand data model based on the obtained data, and uses the obtained water demand data model to predict the pressure demand value at the water outlet of the unit in the next period with a preset time period.

[0044] Step 3, control the unit according to the predicted pressure demand value at the water outlet of the unit in the next period. Assuming that the water demand for the next period is predicted with a cycle of 4h in step 2, the unit will execute the pressure demand value H1 of the water outlet issued in the previous cycle from 00:00 to 04:00. At 03:50, the platform issues the target pressure demand value from 04:00 to 08:00, and the unit supplies water with the water pressure demand value of the new cycle after entering a new cycle. Since the data platform has established a water demand model, the predicted data issued each time is basically the actual water demand, and the unit supplies water based on this as the target value, which can greatly reduce the energy consumption of the unit compared with the traditional constant pressure water supply.

[0045] Step 4: If there is a sudden change in water demand, the pressure demand value at the water outlet of the unit is corrected, and the unit is controlled using the corrected pressure demand value at the water outlet of the unit.

[0046] The pressure demand value calculated in step 2 of this embodiment is only a predicted value calculated based on water use habits. In the actual water use process, there may be a sudden change in water demand (a sudden increase in demand or a sudden decrease in demand); then the water supply unit needs to correct the predicted pressure demand value in combination with the current flow data and the pressure at the end of the pipeline (or the most unfavorable point) when executing the predicted pressure demand value issued by the platform.

[0047] In this step, the following method is used to determine whether the water demand has increased suddenly: first, the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet are detected; whether the pressure at the end of the pipeline continues to decrease; if the pressure at the end of the pipeline continues to decrease, then it is further determined whether the real-time instantaneous flow rate of the water outlet continues to increase; if the real-time instantaneous flow rate of the water outlet continues to increase, it indicates that the predicted pressure demand value does not meet the actual water demand, and it is determined that the water demand has increased suddenly.

[0048] When there is a sudden increase in water demand, a pressure adjustment value ΔH is added to the predicted pressure demand value, and the unit is controlled with the increased pressure value. At the same time, it is observed whether the pressure at the end of the pipeline reaches the normal range. If not, it means that the adjusted pressure value is insufficient to meet the current water demand. At this time, the pressure demand value continues to be increased, that is, a pressure adjustment value is added to the adjusted pressure value. If the unit runs for a period of time based on the new target pressure value, the pressure at the end of the pipeline continues to increase or the real-time instantaneous flow rate of the outlet water continues to decrease, then the pressure adjustment value ΔH is reduced based on the current pressure demand value until the management end pressure returns to the normal range.

[0049] In this step, the following method is used to determine whether the water demand has dropped suddenly: first, the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet are detected; whether the pressure at the end of the pipeline continues to increase; if the pressure at the end of the pipeline continues to increase, then it is further determined whether the real-time instantaneous flow rate of the water outlet continues to decrease; if the real-time instantaneous flow rate of the water outlet continues to decrease, it indicates that the predicted pressure demand value does not meet the actual water demand, and it is determined that the water demand has dropped suddenly.

[0050] When there is a sudden drop in water demand, a pressure adjustment value ΔH is reduced based on the predicted pressure demand value, and the unit is controlled at the reduced pressure value. At the same time, it is observed whether the pressure at the end of the pipeline reaches the normal range. If not, it means that the pressure at the end of the pipeline continues to increase or remains at a higher pressure. In this case, the pressure demand value continues to be reduced, and when the pressure demand value reaches the low pressure range, a pressure adjustment value ΔH is increased until the pressure at the end of the pipeline returns to the normal range.

[0051] It is not difficult to find that the present invention predicts the target pressure through the water demand model, and corrects the predicted target pressure value according to the actual water demand during the actual water use process. This can ensure stable water use while saving energy, thereby achieving the effect of reducing energy consumption while meeting water demand.

[0052] A second embodiment of the present invention relates to a control device for voltage and current conversion in a booster pump station, comprising:

[0053] The detection module is used to detect the real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet;

[0054] The prediction module is used to transmit the collected real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline, and the real-time instantaneous flow rate of the water outlet to the big data platform. The big data platform establishes a water demand data model based on the obtained data, and uses the obtained water demand data model to predict the pressure demand value of the water outlet of the unit in the next period with a preset time as the cycle;

[0055] A control module, used to control the unit according to the predicted pressure demand value of the water outlet of the unit in the next period;

[0056] The correction module is used to correct the pressure demand value at the water outlet of the unit when a sudden change in water demand occurs, and use the corrected pressure demand value at the water outlet of the unit to control the unit.

[0057] The correction module comprises:

[0058] Detection unit, used to detect the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet;

[0059] A first judgment unit, used to judge whether the pressure at the end of the pipeline continues to increase;

[0060] A second judgment unit is used to further judge whether the real-time instantaneous flow rate of the water outlet continues to decrease when the pressure at the end of the pipeline continues to increase;

[0061] The first determination unit is used to determine that a sudden drop in water demand occurs when the real-time instantaneous flow rate of the water outlet continues to decrease.

[0062] The correction module also includes:

[0063] A third judgment unit is used to judge whether the pressure at the end of the pipeline continues to decrease;

[0064] A fourth judgment unit is used to further judge whether the real-time instantaneous flow rate of the water outlet continues to increase when the pressure at the end of the pipeline continues to decrease;

[0065] The second determination unit is used to determine that a sudden increase in water demand occurs when the real-time instantaneous flow rate of the outflowing water continues to increase.

[0066] When the correction module corrects the pressure demand value at the water outlet of the unit, when there is a sudden drop in water demand, a pressure adjustment value is reduced on the basis of the predicted pressure demand value, and whether the pressure at the end of the pipeline reaches the normal range is observed. If not, the pressure demand value is continued to be reduced, and when the pressure demand value reaches the low pressure range, a pressure adjustment value is increased until the pressure at the end of the pipeline returns to the normal range; when there is a sudden increase in water demand, a pressure adjustment value is added on the basis of the predicted pressure demand value, and whether the pressure at the end of the pipeline reaches the normal range is observed. If not, the pressure demand value is continued to be increased, and when the pressure at the end of the pipeline continues to increase or the real-time instantaneous flow rate of the water outlet continues to decrease, a pressure adjustment value is reduced on the basis of the current pressure demand value until the pressure at the management end returns to the normal range.

[0067] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0068] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0069] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction method, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0070] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0071] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A control method for pressure conversion and flow conversion of a booster pump station, characterized in that: The following steps are involved: Detect the real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet; The collected real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline, and the real-time instantaneous flow rate of the water outlet are transmitted to the big data platform. The big data platform establishes a water demand data model based on the obtained data, and uses the obtained water demand data model to predict the pressure demand value of the water outlet of the unit in the next period with a preset time period; Control the unit according to the predicted pressure demand value at the water outlet of the unit in the next period; If there is a sudden change in water demand, the pressure demand value at the water outlet of the unit is corrected, and the unit is controlled using the corrected pressure demand value at the water outlet of the unit.

2. The control method for pressure conversion and current conversion of a booster pump station according to claim 1 is characterized in that: The sudden change in water demand is determined by the following methods: Detect the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet; Determine whether the pressure at the end of the pipeline continues to increase; If the pressure at the end of the pipeline continues to increase, it is further determined whether the real-time instantaneous flow rate of the water outlet continues to decrease; If the real-time instantaneous outflow flow rate continues to decrease, it is determined that a sudden drop in water demand occurs.

3. The control method for voltage and current conversion of a booster pump station according to claim 1, characterized in that: The sudden change in water demand is determined by the following methods: Detect the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet; Determine whether the pressure at the end of the pipeline continues to decrease; If the pressure at the end of the pipeline continues to decrease, it is further determined whether the real-time instantaneous flow rate of the water outlet continues to increase; If the real-time instantaneous flow rate of the water outlet continues to increase, it is determined that a sudden increase in water demand occurs.

4. The control method for pressure conversion and current conversion of a booster pump station according to claim 1, characterized in that: The correction of the pressure demand value at the water outlet of the unit is specifically as follows: When the water demand suddenly drops, reduce a pressure adjustment value based on the predicted pressure demand value, and observe whether the pressure at the end of the pipeline reaches the normal range. If not, continue to reduce the pressure demand value, and when the pressure demand value reaches the low pressure range, increase a pressure adjustment value until the pressure at the end of the pipeline returns to the normal range. When there is a sudden increase in water demand, add a pressure adjustment value based on the predicted pressure demand value, and observe whether the pressure at the end of the pipeline reaches the normal range. If not, continue to increase the pressure demand value, and when the pressure at the end of the pipeline continues to increase or the real-time instantaneous flow rate of the water outlet continues to decrease, reduce the pressure adjustment value based on the current pressure demand value until the pressure at the management end returns to the normal range.

5. A control device for pressure conversion and current conversion of a booster pump station, characterized in that: include: The detection module is used to detect the real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet; The prediction module is used to transmit the collected real-time pressure at the water outlet of the unit, the pressure at the end of the pipeline, and the real-time instantaneous flow rate of the water outlet to the big data platform. The big data platform establishes a water demand data model based on the obtained data, and uses the obtained water demand data model to predict the pressure demand value of the water outlet of the unit in the next period with a preset time as the cycle; A control module, used to control the unit according to the predicted pressure demand value of the water outlet of the unit in the next period; The correction module is used to correct the pressure demand value at the water outlet of the unit when a sudden change in water demand occurs, and use the corrected pressure demand value at the water outlet of the unit to control the unit.

6. The control device for voltage and current conversion of a booster pump station according to claim 5, characterized in that: The correction module comprises: Detection unit, used to detect the pressure at the end of the pipeline and the real-time instantaneous flow rate of the water outlet; A first judgment unit, used to judge whether the pressure at the end of the pipeline continues to increase; A second judgment unit is used to further judge whether the real-time instantaneous flow rate of the water outlet continues to decrease when the pressure at the end of the pipeline continues to increase; The first determination unit is used to determine that a sudden drop in water demand occurs when the real-time instantaneous flow rate of the water outlet continues to decrease.

7. The control device for voltage and current conversion of a booster pump station according to claim 6, characterized in that: The correction module also includes: A third judgment unit is used to judge whether the pressure at the end of the pipeline continues to decrease; A fourth judgment unit is used to further judge whether the real-time instantaneous flow rate of the water outlet continues to increase when the pressure at the end of the pipeline continues to decrease; The second determination unit is used to determine that a sudden increase in water demand occurs when the real-time instantaneous flow rate of the outflowing water continues to increase.

8. The control device for pressure conversion and current conversion of a booster pump station according to claim 5, characterized in that: When the correction module corrects the pressure demand value of the water outlet of the unit, When the water demand suddenly drops, reduce a pressure adjustment value based on the predicted pressure demand value, and observe whether the pressure at the end of the pipeline reaches the normal range. If not, continue to reduce the pressure demand value, and when the pressure demand value reaches the low pressure range, increase a pressure adjustment value until the pressure at the end of the pipeline returns to the normal range. When there is a sudden increase in water demand, add a pressure adjustment value based on the predicted pressure demand value, and observe whether the pressure at the end of the pipeline reaches the normal range. If not, continue to increase the pressure demand value, and when the pressure at the end of the pipeline continues to increase or the real-time instantaneous flow rate of the water outlet continues to decrease, reduce the pressure adjustment value based on the current pressure demand value until the pressure at the management end returns to the normal range.

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