A small flow pressure stabilizing system and method

Abstract

The application provides a small-flow stable voltage system and method, which comprises a water conveying pipeline, a water storage pool connected with the inlet of the water conveying pipeline, a booster pump connected with the outlet of the water conveying pipeline, a water quantity detection device arranged in the water storage pool, a first pressure sensor arranged at the inlet of the water conveying pipeline, a second pressure sensor arranged at the outlet of the water conveying pipeline, and a voltage control device connected with the first pressure sensor, the second pressure sensor, the water quantity detection device and the booster pump respectively; the voltage control device is used for adaptively and real-timely controlling the output voltage of the booster pump based on the first real-time pressure detected by the first pressure sensor at the inlet of the water conveying pipeline, the second real-time pressure detected by the second pressure sensor at the outlet of the water conveying pipeline and the real-time water storage quantity of the water storage pool detected by the water quantity detection device, so as to obtain a stable voltage result; and the smooth control of the output voltage of the booster pump is used to realize a better stable voltage effect in the water conveying pipeline.

Description

Technical Field

[0001] This invention relates to the field of liquid control technology, and in particular to a low-flow-rate pressure stabilization system and method. Background Technology

[0002] Currently, in order to alleviate the water pressure fluctuations at the end of the water supply caused by the contradiction between water supply and demand, and to ensure the stability of the output water pressure during peak and off-peak water supply periods, booster pumps can be fully utilized to adjust the water supply from the reservoir to the water transmission pipeline, thereby ensuring that the output water pressure of the water transmission pipeline remains stable and providing better water supply.

[0003] However, the existing secondary pressurized water supply equipment provides relatively little effective compensation for low-flow pressure maintenance. During periods of fluctuating water consumption, the booster pumps start and stop frequently, especially at night, which is more noticeable. This can affect the service life of the booster pumps and also lead to insufficient pressure stabilization in the water pipeline, resulting in large fluctuations in water outflow pressure.

[0004] Therefore, this invention proposes a low-flow voltage stabilization system and method. Summary of the Invention

[0005] This invention provides a low-flow pressure stabilization system and method, which adapts to the changes in liquid pressure in a water pipeline based on the water storage pattern of the reservoir, the response pattern of the booster pump, and the change response relationship between the liquid pressure in the pipeline. It can automatically adjust the liquid pressure in the pipeline in a timely, efficient, and smooth manner, according to changes in the supply conditions of the reservoir and the demand of the user's network. It ensures the user's water volume and pressure requirements during both peak and off-peak water flow periods, while also ensuring relatively long-term differential compensation and flow pressure maintenance. This not only achieves better pressure stabilization but also extends the service life of the booster pump through smooth control.

[0006] This invention provides a low-flow voltage stabilization system, comprising:

[0007] A water supply pipeline, a water storage tank connected to the inlet of the water supply pipeline, a booster pump connected to the outlet of the water supply pipeline, a water volume detection device installed in the water storage tank, a first pressure sensor installed at the inlet of the water supply pipeline, a second pressure sensor installed at the outlet of the water supply pipeline, and a voltage control device connected to the first pressure sensor, the second pressure sensor, the water volume detection device, and the booster pump respectively.

[0008] The voltage control device is used to adaptively control the output voltage of the booster pump in real time based on the first real-time pressure detected by the first pressure sensor at the inlet of the water pipeline and the second real-time pressure detected by the second pressure sensor at the outlet of the water pipeline, as well as the real-time water storage volume of the reservoir detected by the water volume detection device, so as to obtain a stable pressure result.

[0009] Preferably, the voltage control device includes:

[0010] The curve generation module is used to generate a smoothed output voltage curve for the latest prediction period based on all first real-time pressures, all second real-time pressures, and all real-time water storage within the analysis period, combined with the latest obtained real-time water storage.

[0011] The voltage control module is used to control the current output voltage of the booster pump in real time based on the output voltage smoothing curve to obtain a voltage stabilization result.

[0012] Preferably, the curve generation module includes:

[0013] The parameter determination unit is used to determine the pressure stabilization response time, the water storage rules of the reservoir, and the functional relationship between the water storage volume and the first real-time pressure based on all first real-time pressures, all second real-time pressures, and all real-time water storage volumes within the analysis period.

[0014] The curve generation unit is used to generate a smooth output voltage curve for the latest prediction period based on the voltage stabilization response time, the water storage rules of the reservoir, the functional relationship between the water storage volume and the first real-time pressure, and the latest obtained real-time water storage volume.

[0015] Preferably, the parameter determination unit includes:

[0016] The response determination subunit is used to determine the stabilization response time based on all first real-time pressures and all second real-time pressures within the analysis period;

[0017] The rule determination subunit is used to determine the water storage rules of the reservoir based on all real-time water storage volumes during the analysis period.

[0018] The relationship determination subunit is used to determine the functional relationship between water storage and first real-time pressure based on all first real-time pressures and all real-time water storages within the analysis period.

[0019] Preferably, the response determination subunit includes:

[0020] The first generation end is used to generate a first real-time pressure curve based on all first real-time pressures within the analysis period;

[0021] The second generation end is used to generate a second real-time pressure curve based on all second real-time pressures within the analysis period;

[0022] The response determination end is used to determine the stabilization response time based on the first real-time pressure curve and the second real-time pressure curve.

[0023] Preferably, the rule-determined subunit includes:

[0024] The third generation end is used to generate the first water storage curve based on all real-time water storage during the analysis period;

[0025] The rule analysis module is used to analyze the water storage rules of the reservoir based on the first water storage curve.

[0026] Preferably, the relationship-determining subunit includes:

[0027] The curve acquisition end is used to acquire the first real-time pressure curve generated based on all first real-time pressures within the analysis period and the first water storage curve generated based on all real-time water storage within the analysis period.

[0028] The relationship determination end is used to analyze the functional relationship between the water storage volume and the first real-time pressure based on the first water storage volume curve and the first real-time pressure curve.

[0029] Preferably, the curve generation unit includes:

[0030] The curve determination sub-unit is used to determine the second water storage curve in the latest prediction period in real time based on the water storage rules and the latest real-time water storage.

[0031] The voltage smoothing subunit is used to generate the output voltage smoothing curve for the latest prediction period in real time based on the second water storage curve, the functional relationship, and the voltage regulation response time.

[0032] The voltage control subunit is used to control the current output voltage of the booster pump in real time based on the output voltage smoothing curve.

[0033] Preferably, the voltage control module includes:

[0034] The first control unit is used to set the real-time output voltage of the booster pump to the output voltage corresponding to the current time in the output voltage smoothing curve when the current analysis cycle is the first analysis cycle, so as to obtain the voltage stabilization result.

[0035] The second control unit is used to set the real-time output voltage of the booster pump to the average value of the output voltages corresponding to all output voltage smoothing curves obtained within the preset period at the current time when the current analysis period is not the first analysis period, so as to obtain the voltage stabilization result.

[0036] Preferably, a low-flow-rate pressure stabilization method includes: adaptively controlling the output voltage of the booster pump in real time based on the first real-time pressure detected by the first pressure sensor at the inlet of the water pipeline and the second real-time pressure detected by the second pressure sensor at the outlet of the water pipeline, and based on the real-time water storage volume of the reservoir detected by the water volume detection device, to obtain a pressure stabilization result.

[0037] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0038] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0040] Figure 1 This is a schematic diagram of the internal structure connection of a small flow voltage stabilization system according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of a voltage control device according to an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of a curve generation module in an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of a parameter determination unit in an embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram of a response determination subunit in an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of a rule-determining subunit in an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of a relationship determination subunit in an embodiment of the present invention;

[0047] Figure 8 This is a schematic diagram of a curve generation unit in an embodiment of the present invention;

[0048] Figure 9 This is a schematic diagram of a voltage control module in an embodiment of the present invention. Detailed Implementation

[0049] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0050] Example 1:

[0051] This invention provides a low-flow voltage stabilization system, referenced Figure 1 ,include:

[0052] A water supply pipeline, a water storage tank connected to the inlet of the water supply pipeline, a booster pump connected to the outlet of the water supply pipeline, a water volume detection device installed in the water storage tank, a first pressure sensor installed at the inlet of the water supply pipeline, a second pressure sensor installed at the outlet of the water supply pipeline, and a voltage control device connected to the first pressure sensor, the second pressure sensor, the water volume detection device, and the booster pump respectively.

[0053] The voltage control device is used to adaptively control the output voltage of the booster pump in real time based on the first real-time pressure detected by the first pressure sensor at the inlet of the water pipeline and the second real-time pressure detected by the second pressure sensor at the outlet of the water pipeline, as well as the real-time water storage volume of the reservoir detected by the water volume detection device, so as to obtain a stable pressure result.

[0054] In this embodiment, the water supply pipeline is a pipeline used to transmit water from the reservoir to the user located at the end of the pipeline.

[0055] In this embodiment, the water storage tank is a water storage tank used to store water for supply to users.

[0056] In this embodiment, the booster pump is a device used to increase the water pressure of the remaining water storage in the water pipeline by installing it at the end of the water pipeline and controlling the blade speed of the impeller based on the output voltage.

[0057] In this embodiment, the water volume detection device is a device used to detect the remaining water volume in the water storage tank.

[0058] In this embodiment, the first pressure sensor is a sensor used to detect the water pressure at the inlet of the water supply pipeline.

[0059] In this embodiment, the second pressure sensor is a sensor used to detect the water pressure at the outlet of the water supply pipeline.

[0060] In this embodiment, the voltage control device is a device for controlling the output voltage of the booster pump based on the first real-time pressure detected by the first pressure sensor, the second real-time pressure detected by the second pressure sensor, and the real-time water storage volume detected by the water volume detection device.

[0061] In this embodiment, the first real-time pressure is the real-time water pressure of the water supply pipeline detected by the first pressure sensor at the inlet of the water supply pipeline.

[0062] In this embodiment, the second real-time pressure is the real-time water pressure of the water pipeline detected by the second pressure sensor at the outlet of the water pipeline.

[0063] In this embodiment, the real-time water storage volume is the real-time remaining water storage volume of the water storage tank detected by the water volume detection device.

[0064] In this embodiment, the output voltage is the output voltage of the booster pump, which is linearly related to the boost ratio output by the booster pump.

[0065] In this embodiment, the pressure stabilization result is the result of controlling the output voltage of the booster pump based on the first real-time pressure detected by the first pressure sensor, the second real-time pressure detected by the second pressure sensor, and the real-time water storage volume detected by the water volume detection device, thereby achieving a stable water supply pressure in the water pipeline.

[0066] The beneficial effects of the above technology are as follows: Based on the water storage pattern of the reservoir, the response pattern of the booster pump, and the change response relationship between the liquid pressure in the water pipeline, the liquid pressure in the water pipeline can be adjusted in a timely, efficient, and smooth manner. It can automatically adjust according to the changes in the supply conditions of the reservoir and the demand of the user's pipeline network. It can ensure the user's requirements for water volume and pressure during both peak and off-peak water supply periods. At the same time, it can ensure relatively long-term differential compensation and flow pressure maintenance, which not only achieves better pressure stabilization effect, but also extends the service life of the booster pump through smooth control of the booster pump.

[0067] Example 2:

[0068] Based on Example 1, the voltage control device, reference Figure 2 ,include:

[0069] The curve generation module is used to generate a smoothed output voltage curve for the latest prediction period based on all first real-time pressures, all second real-time pressures, and all real-time water storage within the analysis period, combined with the latest obtained real-time water storage.

[0070] The voltage control module is used to control the current output voltage of the booster pump in real time based on the output voltage smoothing curve to obtain a voltage stabilization result.

[0071] In this embodiment, the analysis period is the preset data acquisition period required to determine the output voltage smoothing curve, that is, to determine the output voltage smoothing curve, all first real-time pressures, all second real-time pressures, and all real-time water storage within the analysis period.

[0072] In this embodiment, the latest prediction period is the period in which the generated output voltage smoothing curve is located. The latest prediction period is the time period that has not yet occurred, starting from the current time.

[0073] In this embodiment, the output voltage smoothing curve is the output voltage change curve predicted when the output voltage of the booster pump is smoothly controlled in the corresponding latest cycle, based on all first real-time pressures, all second real-time pressures, and all real-time water storage within the analysis period, combined with the latest obtained real-time water storage.

[0074] In this embodiment, the current output voltage is the output voltage of the booster pump at the current moment.

[0075] The beneficial effects of the above technology are as follows: it enables the prediction of the output voltage smoothing curve of the booster pump in the latest prediction period based on all first real-time pressures, all second real-time pressures, and all real-time water storage within the analysis period, combined with the latest obtained real-time water storage. This allows for the early determination of the booster pump's output voltage and pre-smoothing of the booster pump's output voltage. This method is smoother and more stable than the control method based on the real-time pressure at the water pipeline outlet, thereby extending the service life of the booster pump.

[0076] Example 3:

[0077] Based on Example 2, the curve generation module, referencing Figure 3 ,include:

[0078] The parameter determination unit is used to determine the pressure stabilization response time, the water storage rules of the reservoir, and the functional relationship between the water storage volume and the first real-time pressure based on all first real-time pressures, all second real-time pressures, and all real-time water storage volumes within the analysis period.

[0079] The curve generation unit is used to generate a smooth output voltage curve for the latest prediction period based on the voltage stabilization response time, the water storage rules of the reservoir, the functional relationship between the water storage volume and the first real-time pressure, and the latest obtained real-time water storage volume.

[0080] In this embodiment, the pressure stabilization response time is the (response) time required from when the water pressure at the inlet of the water supply pipeline is adjusted to the target value by the booster pump to the water pressure at the inlet of the water supply pipeline becoming the target value, based on all first real-time pressures and all second real-time pressures determined within the analysis period.

[0081] In this embodiment, the water storage rule is the water storage change rule of the water storage tank determined based on all real-time water storage during the analysis period, that is, the rule includes the water inflow cycle of the water storage tank and the average remaining water storage change curve of the water storage tank during the water inflow cycle.

[0082] In this embodiment, the functional relationship is the functional relationship between the water storage volume and the first real-time pressure determined based on all first real-time pressures and all real-time water storage volumes within the analysis period.

[0083] The beneficial effects of the above technology are as follows: Based on all first real-time pressures, all second real-time pressures, and all real-time water storage volumes within the analysis period, the pressure stabilization response time, the water storage rules of the reservoir, and the functional relationship between water storage volume and first real-time pressure are determined. Based on the pressure stabilization response time, the water storage rules of the reservoir, and the functional relationship between water storage volume and first real-time pressure, and combined with the latest obtained real-time water storage volume, a smooth output voltage curve for the latest prediction period is generated. Thus, in the smooth control process of the booster pump, the water pressure control delay factors at the inlet and outlet of the water pipeline, the water storage volume change rules of the reservoir, and the functional relationship between water storage volume and real-time water pressure at the inlet of the water pipeline are taken into account, thereby enhancing the pressure stabilization effect within the water pipeline.

[0084] Example 4:

[0085] Based on Example 3, the parameter determination unit, referencing Figure 4 ,include:

[0086] The response determination subunit is used to determine the stabilization response time based on all first real-time pressures and all second real-time pressures within the analysis period;

[0087] The rule determination subunit is used to determine the water storage rules of the reservoir based on all real-time water storage volumes during the analysis period.

[0088] The relationship determination subunit is used to determine the functional relationship between water storage and first real-time pressure based on all first real-time pressures and all real-time water storages within the analysis period.

[0089] The beneficial effects of the above technologies are: to determine the time required from the start of voltage adjustment of the booster pump to the point where the water pressure at the outlet of the water pipeline becomes the target value based on all first real-time pressures and all second real-time pressures within the analysis period; to determine the change rule of the water storage volume in the reservoir based on all real-time water storage volumes within the analysis period; and to determine the functional relationship between the water storage volume in the reservoir and the first real-time pressure based on all first real-time pressures and all real-time water storage volumes within the analysis period.

[0090] Example 5:

[0091] Based on Example 4, the response determination subunit is referenced. Figure 5 ,include:

[0092] The first generation end is used to generate a first real-time pressure curve based on all first real-time pressures within the analysis period;

[0093] The second generation end is used to generate a second real-time pressure curve based on all second real-time pressures within the analysis period;

[0094] The response determination end is used to determine the stabilization response time based on the first real-time pressure curve and the second real-time pressure curve.

[0095] In this embodiment, the first real-time pressure curve is the curve obtained by sorting and connecting all the first real-time pressures in the analysis period according to time sequence.

[0096] In this embodiment, the second real-time pressure curve is the curve obtained by sorting and connecting all the second real-time pressures in the analysis period according to time sequence.

[0097] In this embodiment, the pressure stabilization response time is determined based on the first real-time pressure curve and the second real-time pressure curve, including:

[0098] The first maximum value (i.e., the maximum pressure value in the first real-time pressure curve) and the first minimum value (i.e., the minimum pressure value in the first real-time pressure curve) in the first real-time pressure curve are determined, as are the second maximum value (i.e., the maximum pressure value in the second real-time pressure curve) and the second minimum value (i.e., the minimum pressure value in the second real-time pressure curve) in the second real-time pressure curve.

[0099] The product of the larger of the difference between the first maximum and the second minimum value and the difference between the second maximum and the first minimum value, and the preset screening deviation ratio (i.e., the preset ratio used to determine the second screening deviation range value, which can be a value between 0.01 and 0.1), and the preset inlet and outlet pressure difference (i.e., the preset water pressure difference between the inlet and outlet of the water pipeline under normal conditions), is used as the second screening deviation range value (i.e., the screening range used to select the pressure response time point corresponding to the corresponding point in the first real-time pressure curve from the second real-time pressure curve). This is:

[0100] d=D MAX *α+ΔP

[0101] In the formula, d is the second screening deviation range value, D MAX The larger of the difference between the first maximum and the second minimum value and the difference between the second maximum and the first minimum value, α is the preset screening deviation percentage, and ΔP is the preset inlet and outlet pressure difference (assuming: D). MAX If α is 100, 0.05, and ΔP is 6, then d is 11.

[0102] In the second real-time pressure curve, select the corresponding points whose pressure difference with the corresponding point in the first real-time pressure curve (i.e., the difference between the pressure value corresponding to the point in the second real-time pressure curve and the pressure value of the point in the first real-time pressure curve) does not exceed the second selection deviation range (i.e., the pressure response time point corresponding to the corresponding point in the first real-time pressure curve selected from the second real-time pressure curve).

[0103] Align the first real-time pressure curve and the second real-time pressure curve to obtain the first alignment result (that is, the result obtained after aligning the first real-time pressure curve and the second real-time pressure curve). Based on the first alignment result, determine the response time interval between each point in the first real-time pressure curve and the corresponding point in the second real-time pressure curve (that is, the time interval between each point in the first real-time pressure curve and the corresponding point in the second real-time pressure curve in the first alignment result, and the time interval here is also the horizontal axis interval).

[0104] The average of the response time intervals at all points in the first real-time pressure curve is taken as the stabilization response time.

[0105] The beneficial effects of the above technology are as follows: Based on the maximum and minimum values ​​in the first real-time pressure curve and the maximum and minimum values ​​in the second real-time pressure curve, the percentage of the deviation from the preset screening and the preset inlet and outlet pressure difference are used to determine the screening range for the pressure response time points corresponding to the corresponding points in the first real-time pressure curve in the second real-time pressure curve. Based on this screening range, the corresponding points corresponding to each point in the first real-time pressure curve are screened in the second real-time pressure curve. Based on the average value of the time interval between all points and the corresponding points in the first real-time pressure curve, the response time of pressure change from the inlet to the outlet of the water pipeline can be determined.

[0106] Example 6:

[0107] Based on Example 4, rules are used to determine sub-units, with reference to... Figure 6 ,include:

[0108] The third generation end is used to generate the first water storage curve based on all real-time water storage during the analysis period;

[0109] The rule analysis module is used to analyze the water storage rules of the reservoir based on the first water storage curve.

[0110] In this embodiment, the first water storage curve is the curve obtained by sorting and connecting all real-time water storage within the analysis period.

[0111] In this embodiment, the water storage rules of the reservoir are analyzed based on the first water storage curve, including:

[0112] Determine the extreme value difference between the maximum and minimum values ​​in the first water storage curve (i.e., the difference between the maximum and minimum values ​​in the first water storage curve). Multiply the extreme value difference by the preset screening deviation ratio (i.e., the preset ratio used to determine the first screening deviation range value, which can be a value between 0.01 and 0.1) as the first screening deviation range value (i.e., the screening range used to screen out the corresponding points of each point in the first water storage curve in different water inflow cycles, where the time interval between the point and the start time of the corresponding water inflow cycle is equal to the time interval between the corresponding point of the cycle and the start time of the corresponding water inflow cycle).

[0113] Points in the first water storage curve whose water storage deviation value (i.e., the difference between the corresponding water storage and the water storage at that point) does not exceed the first screening deviation range value are identified as the first cycle corresponding points (i.e., the points that may be the corresponding points in different water inflow cycles, i.e., the time interval between the point and the start time of its water inflow cycle is equal to the time interval between the cycle corresponding point and the start time of its water inflow cycle). The interval containing the continuous first cycle corresponding points corresponding to the points in the first water storage curve is identified as the cycle corresponding interval of the corresponding points (i.e., the interval composed of the continuous first cycle corresponding points corresponding to the points in the first water storage curve).

[0114] In the first water storage curve, the periodic interval that is closest to the corresponding point (i.e., the periodic interval with the smallest average time interval between all points in the periodic interval and the corresponding point) is selected as the target interval.

[0115] Based on the time interval between the points in the first water storage curve and the two endpoints of the corresponding target interval, the time interval range of the corresponding points is determined (that is, the time interval between the endpoints of the corresponding points and the corresponding target interval that are closer is taken as the lower limit of the time interval range, and the time interval between the endpoints of the corresponding points and the corresponding target interval that are farther away is taken as the upper limit of the time interval range, and the time interval range is determined based on the upper limit and the lower limit).

[0116] When there is an intersection in the time interval range of each point in the first water storage curve, the intersection of the time interval range of each point in the first water storage curve is determined as the period determination range.

[0117] When there is no intersection between the time interval ranges of each point in the first water storage curve, the intersection with the maximum number of time interval ranges contained in the first water storage curve (i.e., the intersection formed by the maximum number of time interval ranges in the first water storage curve) is determined as the period determination range.

[0118] Based on a preset time interval (i.e., the preset interval when determining the first cycle within the defined cycle range), multiple first cycles are determined within the defined cycle range (i.e., a value is determined as a first cycle value every preset time interval within the defined cycle range). Starting from the beginning of the first water storage curve, a partial water storage curve corresponding to the first cycle is determined (i.e., a partial water storage curve with a length of the first cycle is determined starting from the beginning of the first water storage curve). In the first water storage curve, a second cycle corresponding point is determined for each point in the partial water storage curve (i.e., a second cycle corresponding point is determined every first cycle starting from a point in the partial water storage curve).

[0119] Based on the first water storage volume corresponding to each point in the partial water storage curve for each first cycle and the second water storage volume corresponding to all points in the second cycle, the evaluation value for the corresponding first cycle is calculated:

[0120]

[0121] In the formula, P is the evaluation value of the first cycle, i is the i-th point in the partial water storage curve corresponding to the first cycle, n is the total number of points in the partial water storage curve corresponding to the first cycle, j is the j-th corresponding point in the second cycle for each point in the partial water storage curve corresponding to the first cycle, m is the total number of corresponding points in all second cycles for a single point in the partial water storage curve corresponding to the first cycle, and x... i0 x represents the first water storage volume corresponding to the i-th point in the partial water storage curve for the first cycle. ij This refers to the second water storage value corresponding to the j-th point in the second period for each point in the partial water storage curve corresponding to the first period. (For example, if the first water storage values ​​corresponding to two points in the partial water storage curve are 100 and 200, the second water storage values ​​corresponding to the first point in the partial water storage curve in the second period are 101, 102, and 103, and the second water storage values ​​corresponding to the second point in the partial water storage curve in the second period are 201, 202, and 203, then the evaluation value for the first period is 0.985.)

[0122] The first cycle corresponding to the maximum evaluation value is taken as the water inlet cycle of the reservoir;

[0123] Based on the inflow cycle, the first water storage curve is divided into multiple sub-water storage curves (that is, starting from the beginning of the first water storage curve, the first water storage curve is divided into multiple sub-water storage curves with a length equal to the inflow cycle). The average curve after aligning the multiple sub-water storage curves (the average curve has the same length as the sub-water storage curves, and the average curve is a curve fitted by the average water storage value of all aligned sub-water storage curves at corresponding points) is used as the average remaining water storage change curve.

[0124] The beneficial effects of the above technology are as follows: By generating a first water storage curve based on all real-time water storage obtained within the analysis period, a first screening deviation range value is determined. Then, based on the first screening deviation range value, corresponding points of the cycle are screened in the first water storage curve. Based on continuous corresponding points of the cycle, corresponding intervals of the cycle are determined. Based on the time interval between the endpoint of the corresponding interval closest to the corresponding point and the corresponding point, the corresponding time interval range is determined as the numerical range of possible values ​​of the water inlet cycle. The intersection of the time interval ranges of all points is used to determine the water inlet cycle based on the time interval range of the majority of points. This achieves accurate analysis of the numerical change cycle in the first water storage curve, thereby accurately determining the water inlet cycle of the reservoir. Then, the function expression corresponding to the curve after dividing, aligning and averaging the first water storage curve based on the water inlet cycle is used as the average remaining water storage change curve. This achieves the analysis of the water inlet cycle of the reservoir and the average remaining water storage change curve of the reservoir within the water inlet cycle based on the first water storage curve.

[0125] Example 7:

[0126] Based on Example 4, the relationship is determined by the sub-unit, with reference to... Figure 7 ,include:

[0127] The curve acquisition end is used to acquire the first real-time pressure curve generated based on all first real-time pressures within the analysis period and the first water storage curve generated based on all real-time water storage within the analysis period.

[0128] The relationship determination end is used to analyze the functional relationship between the water storage volume and the first real-time pressure based on the first water storage volume curve and the first real-time pressure curve.

[0129] In this embodiment, the functional relationship between the water storage volume and the first real-time pressure is analyzed based on the first water storage volume curve and the first real-time pressure curve, including:

[0130] Align the first water storage curve and the first real-time pressure curve to obtain the second alignment result;

[0131] Determine each water storage value in the first water storage curve in the second alignment result and the real-time pressure value in the first real-time pressure curve that is aligned with the corresponding water storage value;

[0132] Based on the real-time pressure value corresponding to each water storage value, the functional relationship between the water storage value and the real-time pressure value is determined as the functional relationship between the real-time water storage in the reservoir and the first real-time pressure.

[0133] The beneficial effects of the above technology are: to realize the real-time pressure value corresponding to each water storage value determined after aligning the first water storage curve and the first real-time pressure curve, and to determine the functional relationship between the real-time water storage in the water tank and the first real-time pressure.

[0134] Example 8:

[0135] Based on Example 3, the curve generation unit, referenced Figure 8 ,include:

[0136] The curve determination sub-unit is used to determine the second water storage curve in the latest prediction period in real time based on the water storage rules and the latest real-time water storage.

[0137] The voltage smoothing subunit is used to generate the output voltage smoothing curve for the latest prediction period in real time based on the second water storage curve, the functional relationship, and the voltage regulation response time.

[0138] The voltage control subunit is used to control the current output voltage of the booster pump in real time based on the output voltage smoothing curve.

[0139] In this embodiment, based on the water storage rules and the latest obtained real-time water storage volume, the second water storage curve for the latest prediction period is determined in real time, including:

[0140] The current moment is determined within the water inflow cycle based on the water storage rules, and the standard remaining water storage at that moment is determined based on the average remaining water storage change curve. The deviation percentage is calculated based on the ratio of the difference between the latest real-time water storage and the standard remaining water storage to the standard remaining water storage.

[0141] The first sub-curve after the current moment in the average remaining water storage curve is determined. The sum of the product of the water storage and the deviation ratio corresponding to each point in the first sub-curve and the corresponding water storage is used as the water storage value of the corresponding point in the new water storage curve to obtain the new water storage curve. The new water storage curve is used as the second water storage curve in the latest prediction period (the latest prediction period is equal to the time interval from the current moment to the end moment of the current water intake cycle, and the end moment is the last moment of the water intake cycle).

[0142] In this embodiment, the second water storage curve is the curve showing the change in the remaining water storage of the water tank in the latest prediction period, which is determined in real time based on the water storage rules and the latest real-time water storage.

[0143] In this embodiment, the output voltage smoothing curve for the latest prediction period is generated in real time based on the second water storage curve, the functional relationship, and the voltage stabilization response time, including:

[0144] Based on the functional relationship, the pressure value corresponding to each water storage volume in the second water storage curve is determined, and the corresponding third real-time pressure curve is fitted based on the pressure value corresponding to each water storage volume in the second water storage curve.

[0145] Based on the pressure difference between each pressure value and the standard water pressure in the third real-time pressure curve, the pressure difference curve is determined. Based on the functional relationship between the pressure difference value and the output voltage, the output voltage corresponding to each pressure difference value in the pressure difference curve is determined. Based on the output voltage corresponding to each pressure difference value in the pressure difference curve, the output voltage curve is fitted. The output voltage curve is shifted to the left along the time axis (by units of the stabilization response time) to obtain the displacement output voltage curve (assuming that the function expression of the output voltage curve is y = f(t), then the displacement output voltage curve is y = f[(1-T)t], where y is the output voltage, t is the time variable, and T is the stabilization response time). The displacement output voltage curve is smoothed (using a cubic B-spline curve interpolation fitting algorithm) to obtain the smoothed output voltage curve within the latest prediction period.

[0146] The beneficial effects of the above technology are as follows: it enables the prediction of a second water storage curve based on water storage rules and the latest real-time water storage volume, which characterizes the change process of the remaining water storage volume of the water tank in the latest prediction period. Based on the second water storage curve, the functional relationship, and the pressure stabilization response time, it generates a smooth output voltage curve in the latest prediction period in real time. This enables smooth control of the booster pump based on the remaining water storage volume of the water tank in the latest prediction period, the functional relationship between the water storage volume and the first real-time pressure, and the pressure stabilization response time between the first real-time pressure and the second real-time pressure, thereby enhancing the pressure stabilization effect of the water supply pressure of the water pipeline.

[0147] Example 9:

[0148] Based on Example 2, the voltage control module, reference Figure 9 ,include:

[0149] The first control unit is used to set the real-time output voltage of the booster pump to the output voltage corresponding to the current time in the output voltage smoothing curve when the current analysis cycle is the first analysis cycle, so as to obtain the voltage stabilization result.

[0150] The second control unit is used to set the real-time output voltage of the booster pump to the average value of the output voltages corresponding to all output voltage smoothing curves obtained within the preset period at the current time when the current analysis period is not the first analysis period, so as to obtain the voltage stabilization result.

[0151] In this embodiment, the current analysis cycle is the analysis cycle in which we are currently in operation.

[0152] In this embodiment, the prediction period is the period of the output voltage smoothing curve obtained when determining the real-time output voltage of the booster pump.

[0153] In this embodiment, the real-time output voltage of the booster pump is set to the average value of the output voltages corresponding to all output voltage smoothing curves obtained within a preset period at the current time, that is:

[0154] Assuming the current time is time t, the output voltage corresponding to time t among all the output voltage smoothing curves obtained within the preset period is determined, and the real-time output voltage of the booster pump is set to the average value of the output voltage corresponding to time t among all the output voltage smoothing curves within the preset period.

[0155] The beneficial effects of the above technologies are as follows: based on the judgment result of whether the analysis cycle is the first analysis cycle, different methods are used to determine the current output voltage of the booster pump based on the obtained output voltage smooth curve, thereby achieving smooth control of the booster pump while ensuring the water pressure stabilization effect of the water supply pipeline, thus extending the service life of the booster pump.

[0156] Example 10:

[0157] This invention provides a low-flow-rate pressure stabilization method, comprising: adaptively controlling the output voltage of a booster pump in real time based on a first real-time pressure detected by a first pressure sensor at the inlet of a water pipeline and a second real-time pressure detected by a second pressure sensor at the outlet of a water pipeline, and based on the real-time water storage volume of a water storage tank detected by a water volume detection device, to obtain a pressure stabilization result.

[0158] The beneficial effects of the above technology are as follows: Based on the water storage pattern of the reservoir, the response pattern of the booster pump, and the change response relationship between the liquid pressure in the water pipeline, the liquid pressure in the water pipeline can be adjusted in a timely, efficient, and smooth manner. It can automatically adjust according to the changes in the supply conditions of the reservoir and the demand of the user's pipeline network. It can ensure the user's requirements for water volume and pressure during both peak and off-peak water supply periods. At the same time, it can ensure relatively long-term differential compensation and flow pressure maintenance, which not only achieves better pressure stabilization effect, but also extends the service life of the booster pump through smooth control of the booster pump.

[0159] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A low-flow-rate voltage stabilization system, characterized in that, include: A water supply pipeline, a water storage tank connected to the inlet of the water supply pipeline, a booster pump connected to the outlet of the water supply pipeline, a water volume detection device installed in the water storage tank, a first pressure sensor installed at the inlet of the water supply pipeline, a second pressure sensor installed at the outlet of the water supply pipeline, and a voltage control device connected to the first pressure sensor, the second pressure sensor, the water volume detection device, and the booster pump respectively. The voltage control device is used to adaptively control the output voltage of the booster pump in real time based on the first real-time pressure detected by the first pressure sensor at the inlet of the water pipeline and the second real-time pressure detected by the second pressure sensor at the outlet of the water pipeline, as well as the real-time water storage volume of the water storage tank detected by the water volume detection device, so as to obtain a stable pressure result. The voltage control device includes: The curve generation module is used to generate a smoothed output voltage curve for the latest prediction period based on all first real-time pressures, all second real-time pressures, and all real-time water storage within the analysis period, combined with the latest obtained real-time water storage. The voltage control module is used to control the current output voltage of the booster pump in real time based on the output voltage smoothing curve to obtain a voltage stabilization result; The curve generation module includes: The parameter determination unit is used to determine the pressure stabilization response time, the water storage rules of the reservoir, and the functional relationship between the water storage volume and the first real-time pressure based on all first real-time pressures, all second real-time pressures, and all real-time water storage volumes within the analysis period. The curve generation unit is used to generate a smooth output voltage curve for the latest prediction period based on the voltage stabilization response time, the water storage rules of the reservoir, the functional relationship between the water storage volume and the first real-time pressure, and the latest obtained real-time water storage volume.

2. The low-flow voltage stabilizing system according to claim 1, characterized in that, The parameter determination unit includes: The response determination subunit is used to determine the stabilization response time based on all first real-time pressures and all second real-time pressures within the analysis period; The rule determination subunit is used to determine the water storage rules of the reservoir based on all real-time water storage volumes during the analysis period. The relationship determination subunit is used to determine the functional relationship between water storage and first real-time pressure based on all first real-time pressures and all real-time water storages within the analysis period.

3. The low-flow voltage stabilizing system according to claim 2, characterized in that, The response determination subunit includes: The first generation end is used to generate a first real-time pressure curve based on all first real-time pressures within the analysis period; The second generation end is used to generate a second real-time pressure curve based on all second real-time pressures within the analysis period; The response determination end is used to determine the stabilization response time based on the first real-time pressure curve and the second real-time pressure curve.

4. The low-flow voltage stabilizing system according to claim 2, characterized in that, The rules define the sub-units, including: The third generation end is used to generate the first water storage curve based on all real-time water storage during the analysis period; The rule analysis module is used to analyze the water storage rules of the reservoir based on the first water storage curve.

5. A low-flow-rate voltage stabilizing system according to claim 2, characterized in that, The relationship determines the subunit, including: The curve acquisition end is used to acquire the first real-time pressure curve generated based on all first real-time pressures within the analysis period and the first water storage curve generated based on all real-time water storage within the analysis period. The relationship determination end is used to analyze the functional relationship between the water storage volume and the first real-time pressure based on the first water storage volume curve and the first real-time pressure curve.

6. The low-flow voltage stabilizing system according to claim 1, characterized in that, The curve generation unit includes: The curve determination sub-unit is used to determine the second water storage curve in the latest prediction period in real time based on the water storage rules and the latest real-time water storage. The voltage smoothing subunit is used to generate the output voltage smoothing curve in the latest prediction period in real time based on the second water storage curve, the functional relationship between water storage and the first real-time pressure, and the voltage stabilization response time. The voltage control subunit is used to control the current output voltage of the booster pump in real time based on the output voltage smoothing curve.

7. A low-flow-rate voltage stabilizing system according to claim 1, characterized in that, The voltage control module includes: The first control unit is used to set the real-time output voltage of the booster pump to the output voltage corresponding to the current time in the output voltage smoothing curve when the current analysis cycle is the first analysis cycle, so as to obtain the voltage stabilization result. The second control unit is used to set the real-time output voltage of the booster pump to the average value of the output voltages corresponding to all output voltage smoothing curves obtained within the preset period at the current time when the current analysis period is not the first analysis period, so as to obtain the voltage stabilization result.

8. A method for stabilizing voltage at low flow rates, characterized in that, include: Based on the first real-time pressure detected by the first pressure sensor at the inlet of the water pipeline and the second real-time pressure detected by the second pressure sensor at the outlet of the water pipeline, as well as the real-time water storage volume of the reservoir detected by the water volume detection device, the output voltage of the booster pump is adaptively controlled in real time to obtain a stable pressure result. The adaptive real-time control of the booster pump's output voltage includes: By using the parameter determination unit, based on all first real-time pressures, all second real-time pressures, and all real-time water storage volumes within the analysis period, the pressure stabilization response time, the water storage rules of the reservoir, and the functional relationship between water storage volume and first real-time pressure are determined. The curve generation unit generates a smooth output voltage curve for the latest prediction period based on the voltage stabilization response time, the water storage rules of the reservoir, the functional relationship between the water storage volume and the first real-time pressure, and the latest real-time water storage volume. The voltage control module controls the current output voltage of the booster pump in real time based on the output voltage smoothing curve to achieve voltage stabilization.

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