CN113047378B - Control method and system of constant-pressure water supply water pump and medium - Google Patents
Control method and system of constant-pressure water supply water pump and medium Download PDFInfo
- Publication number
- CN113047378B CN113047378B CN202110339854.2A CN202110339854A CN113047378B CN 113047378 B CN113047378 B CN 113047378B CN 202110339854 A CN202110339854 A CN 202110339854A CN 113047378 B CN113047378 B CN 113047378B
- Authority
- CN
- China
- Prior art keywords
- water
- water pump
- rotating speed
- pressure
- motors
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/10—Arrangements or adaptations of tanks for water supply for public or like main water supply
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B5/00—Use of pumping plants or installations; Layouts thereof
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
- E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/09—Component parts or accessories
Abstract
The invention discloses a control method, a system and a medium of a constant-pressure water supply pump, wherein the method comprises the following steps: determining a maximum power point tracking track of a water pump motor; detecting the change condition of the water pressure at the water outlet of the water pump; judging the rotating speed change directions of the two water pump motors according to the change condition of the water pressure at the water outlet; and adjusting the rotating speeds of the two water pump motors according to the change condition of the water pressure at the water outlet and the rotating speed change direction of the water pump motors so as to enable the power correspondingly output at the current rotating speed to be identical with the maximum power point tracking track. The system comprises: the device comprises a maximum power point tracking track obtaining unit, a water pressure change detecting unit, a rotating speed conversion direction judging unit and a rotating speed adjusting unit. By the invention, the constant-pressure water supply control of the water pump under the condition of optimal global efficiency is realized, the energy consumption is reduced, and more energy and electricity are saved.
Description
Technical Field
The invention relates to the technical field of water pump control, in particular to a control method, a system and a medium of a constant-pressure water supply water pump.
Background
In order to ensure that the water supply system of the urban building can be safe, reliable, energy-saving and environment-friendly, effective constant-pressure control must be implemented on the water supply of the water pump. The constant-pressure water supply is that a motor speed regulation device is adopted to control the speed regulation operation of a pump set, so as to complete the closed-loop control of the water supply pressure and achieve the purpose of stabilizing the water supply pressure. The water supply system keeps stable water supply pressure, can avoid water resource waste caused by overhigh water pressure and can also avoid influence on use of users due to too small water yield. In the water supply process of the water pump, the rotating speed of a motor of the water pump needs to be adjusted according to different water loads of the environment, so that the water outlet pressure of the water pump is stable. The larger the water pressure or the lift required at the water outlet is, the larger the water outlet load is, and the output torque of the water pump motor is in direct proportion to the rotating speed according to the load characteristics of pumps, so that the rotating speed required by the water pump motor is also larger, and vice versa.
In order to avoid damage to equipment due to shutdown of the water pump, a dual-purpose water pump unit with one water pump and one spare water pump is generally adopted in places with large water supply, namely, the two water pumps are used in parallel, and one water pump is spare for replacement when one water pump is maintained. The control process of the traditional dual-purpose one-standby water pump unit is as follows: one used water pump A always runs at the highest efficiency point, and the other water pump B adjusts the working point according to different water loads, so that the water outlet pressure of the water pump is kept constant. For example, when the water flow at the water outlet is released, the water pressure at the water outlet is reduced, and at this time, in order to maintain the stability of the water outlet pressure, the rotation speed of the adjusting water pump, i.e., the water pump B, needs to be increased to increase the total output torque of the two water pumps and increase the water supply pressure; if the water flow at the water outlet is immediately closed, the rotating speed of the water pump B is reduced, and the total water supply pressure of the two water pumps is restored to the original state.
The traditional control method has simple logic and convenient operation, but the traditional method is not energy-saving under most conditions. Although this method can satisfy the requirement of the water supply pressure of the water pump, the total output power is not the highest, the total efficiency cannot reach the highest, and unnecessary loss is added to the system.
Disclosure of Invention
The invention provides a control method and a control system of a constant-pressure water supply water pump, aiming at the problems in the prior art, and the control method and the control system can enable two water pumps which are used simultaneously to be matched to jointly adjust the operation working condition, so that the total power peak can be reached while the requirement of output torque is met, the operation loss is reduced, and the purposes of energy conservation and emission reduction are achieved.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides a control method of a constant-pressure water supply pump, which comprises the following steps:
determining a maximum power point tracking track of a water pump motor;
detecting the change condition of the water pressure at the water outlet of the water pump;
judging the rotating speed change directions of the two water pump motors according to the change condition of the water pressure at the water outlet;
and adjusting the rotating speeds of the two water pump motors according to the change condition of the water pressure at the water outlet and the rotating speed change direction of the water pump motors so as to enable the power correspondingly output at the current rotating speed to be identical with the maximum power point tracking track.
Preferably, the determining a maximum power point tracking trajectory of the water pump motor includes:
determining the water density of the water pump in the working environment, the gravity acceleration of the working environment, the lift required by the water pump, the radius of a water pump impeller and the area of a region swept by a motor rotor blade, and drawing a power curve graph of a water pump motor under the flow of inlet water flow in different unit time;
and finding out the highest points of the power curves of the water pump motor under the flow rates of the inlet water flow in different unit time, and connecting the highest points into a curve to obtain a maximum power point tracking curve, namely a maximum power point tracking track.
Preferably, the detecting the change of the water pressure at the water outlet of the water pump includes:
detecting by using a sensor, and if the sensor detects that the water pressure at the water outlet is not changed, continuously keeping the original running state; and if the change of the water pressure at the water outlet is detected, judging whether the water pressure is increased or decreased.
Preferably, the determining the rotation speed change direction of the two water pump motors according to the change condition of the water pressure at the water outlet includes:
if the detected water pressure at the water outlet part is reduced, the water supply voltage needs to be increased, and the rotating speeds of the two water pump motors need to be increased;
if the detected water pressure at the water outlet is increased, the water supply voltage needs to be reduced, and the rotating speeds of the two water pump motors need to be reduced.
Preferably, the adjusting the rotation speed of the two water pump motors includes:
controlling two water pump motors according to the maximum power point tracking track, so that the power correspondingly output by the water pump motors at the current rotating speed is matched with the maximum power point tracking track;
according to the judgment of the rotating speed change directions of the two water pump motors, if the rotating speeds of the water pump motors need to be increased, the rotating speeds of the two water pump motors are controlled to be increased simultaneously; and if the rotating speed of the water pump motors needs to be reduced, controlling the rotating speeds of the two water pump motors to be reduced simultaneously.
Preferably, after the rotating speeds of the two water pump motors are adjusted, the method further comprises the following steps: controlling the rotating speed and the power of the water pump motor to reach a preset control target; wherein the content of the first and second substances,
judging whether the rotating speed of the water pump motor reaches a preset control target or not, if so, controlling the water pump motor to stably operate at the current working point, and waiting for the change of the water pressure at the next water outlet; if not, the rotating speed is continuously adjusted until the preset control target is reached. .
The present invention also provides a control system for a constant pressure water supply pump, comprising:
a maximum power point tracking track obtaining unit for determining a maximum power point tracking track of the water pump motor;
the water pressure change detection unit is used for detecting the change condition of the water pressure at the water outlet of the water pump;
the rotating speed change direction judging unit is used for judging the rotating speed change directions of the two water pump motors according to the change condition of the water pressure at the water outlet part detected by the water pressure change detecting unit;
and the rotating speed adjusting unit is used for adjusting the rotating speeds of the two water pump motors according to the change condition of the water pressure at the water outlet part detected by the water pressure change detecting unit and the rotating speed change direction of the water pump motors judged by the rotating speed change direction judging unit so as to ensure that the power correspondingly output at the current rotating speed is matched with the maximum power point tracking track.
The present invention also provides a readable storage medium having stored thereon a computer program for executing the method of controlling the constant pressure water supply pump when the program is executed by a processor.
Compared with the prior art, the embodiment of the invention has at least one of the following advantages:
(1) According to the control method and the system for the constant-pressure water supply water pump, the output of the two water pumps is adjusted at the same time, the two water pumps are matched, and the operation condition is adjusted together, so that the total power peak can be reached while the requirement of output torque is met, the operation loss is reduced, and the purposes of energy conservation and emission reduction are achieved;
(2) According to the control method and the system for the constant-pressure water supply pump, provided by the invention, by controlling the two water pump motors to operate on the power curve of the water pump motors, the requirement on the water supply pressure of the water pump can be met, the total output power can be greatly increased, the total efficiency is also greatly increased, unnecessary loss of a water pump system is reduced, and the control method and the system are more energy-saving and environment-friendly compared with the traditional control method.
Drawings
Embodiments of the invention are further described below with reference to the accompanying drawings:
fig. 1 is a flowchart illustrating a method for controlling a constant pressure water supply pump according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for controlling a constant pressure water supply pump according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a maximum power point tracking trajectory curve of a water pump motor according to a preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of a control system of a constant pressure water supply pump according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a control system of a constant pressure water supply pump according to a preferred embodiment of the present invention;
description of reference numerals: the system comprises a 1-maximum power point tracking track obtaining unit, a 2-water pressure change detecting unit, a 3-rotating speed change direction judging unit, a 4-rotating speed adjusting unit and a 5-preset control target unit.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the invention. The parts not described in detail in the following embodiments can be implemented by using the prior art.
Fig. 1 is a flowchart illustrating a method for controlling a constant pressure water pump according to an embodiment of the present invention.
Referring to fig. 1, the method for controlling a constant pressure water supply pump of the present embodiment includes:
s100, determining a maximum power point tracking track of a water pump motor; in the step, the determination can be carried out according to the parameter conditions of the water pump and the specific working environment condition;
s200, detecting the change condition of the water pressure at the water outlet of the water pump; the step can adopt various detection means to detect, such as a sensor and the like;
s300, judging the rotating speed change directions of the two water pump motors according to the change condition of the water pressure at the water outlet;
and S400, adjusting the rotating speeds of the two water pump motors according to the change condition of the water pressure at the water outlet and the rotating speed change direction of the water pump motors so as to enable the power correspondingly output at the current rotating speed to be identical with the maximum power point tracking track.
According to the embodiment, the output of two water pumps is simultaneously adjusted according to the maximum power point tracking track, the two water pumps are matched to jointly adjust the operation condition, so that the total maximum power point can be reached while the requirement of output torque is met, the operation loss is reduced, and the purposes of energy conservation and emission reduction are achieved; the constant-pressure water supply control of the water pump under the condition of optimal overall efficiency is realized, the energy loss is reduced, and more energy and power are saved.
Fig. 2 is a flow chart showing a control method of the constant pressure water supply pump according to a preferred embodiment of the present invention.
Referring to fig. 2, the method for controlling a constant pressure water supply pump of the present embodiment includes:
s11: calculating to obtain a maximum power point tracking track of the water pump motor according to actual conditions;
s12: detecting the change of water pressure at the water outlet through a sensor;
specifically, if the sensor detects that the water pressure at the water outlet is not changed, the original running state is continuously maintained; if the change is detected, judging whether the water pressure is increased or decreased;
s13: judging the rotating speed change directions of the two water pump motors according to the water pressure change condition;
specifically, if the water pressure at the water outlet detected by the sensor is reduced, the water supply voltage needs to be increased, and the rotating speeds of the two water pump motors need to be increased; if the water pressure at the water outlet position detected by the sensor is increased, the water supply voltage needs to be reduced, and the rotating speeds of the two water pump motors need to be reduced;
s14: adjusting the rotating speeds of the two water pump motors according to the water pressure change condition and the rotating speed change direction of the water pump motors;
s15: and controlling the rotating speed and the power of the water pump motor to reach a preset control target.
In a preferred embodiment, S11 further comprises:
s111: determining the water density of the water pump in the working environment, the gravity acceleration of the working environment, the lift required by the water pump, the radius of a water pump impeller and the area of a region swept by a motor rotor blade, and drawing a power curve graph of a water pump motor under the flow of inlet water flow in different unit time;
s112: and finding out the highest points of the power curves of the water pump motors under the inflow water flow in different unit time, and connecting the highest points into a curve to obtain a maximum power point tracking curve (MPPT).
Specifically, the MPPT curve is obtained in the following manner: the mechanical power calculation formula of the water pump motor is P T ＝ηρgHQ ω In which P is T Represents the mechanical power (unit: watts) generated by the motor, η represents the motor efficiency, ρ represents the liquid density, i.e., the density of water (unit: kg/m) 3 ) And g represents the gravitational acceleration (unit: m/s 2 ) And H represents a water head difference (unit: m), Q ω Representing the water flow per second (unit: m) 3 /s)。
Wherein the motor efficiency η can be expressed in relation to the parameters λ and Q ω Function of (c): η = f (λ, Q) ω ) And is and
in the above formula, R represents the radius (unit: m) of the pump impeller, and A represents the revolutionArea swept by the sub-blades (unit: m) 2 ) Ω denotes a motor rotation speed (unit: rad/s).
The parameters rho, g, H, R and A are used as constants, and a motor power-rotating speed curve graph under different water flows can be drawn according to the formula. The maximum power point tracing curve can be obtained by finding the maximum power point in each curve and connecting the maximum power points into a smooth curve, as shown in fig. 3, which is a maximum power point tracing curve of the water pump motor.
In a preferred embodiment, S14 further comprises:
s141: controlling the two motors according to the obtained maximum power point tracking curve, so that the power correspondingly output at the current rotating speed of the two motors is matched with the maximum power point tracking curve no matter how the rotating speed is when the two motors operate;
s142: according to the judgment of S13, if the rotating speed of the water pump motors needs to be increased, controlling the rotating speeds of the two water pump motors to be increased simultaneously; and if the rotating speed of the water pump motors needs to be reduced, controlling the rotating speeds of the two water pump motors to be reduced simultaneously.
In the above embodiment, the water pump unit may encounter two situations of unchanged or changed water pressure at the water outlet in the process from starting to stable operation, and after the two water pump motors in the above two states operate stably, the output rotating speed of the two water pump motors not only can meet the requirement of water supply pressure, but also can meet the maximum sum of the powers of the two water pump motors. That is, if the water supply pressure is not changed, the sum of the powers of the two water pump motors under other operating conditions is not higher. Therefore, the control method can enable the total efficiency of the two water pump motors to reach the optimal value, reduce unnecessary loss and achieve the effects of energy conservation and environmental protection.
The above preferred features of the embodiments can be used alone in any embodiment, or in any combination thereof without conflict. The preferred features described above are equally applicable to the embodiment shown in figure 1.
Fig. 4 is a schematic diagram of a control system of a constant pressure water supply pump according to an embodiment of the present invention.
Referring to fig. 4, the control system of the constant pressure water supply pump of the present embodiment includes: the device comprises a maximum power point tracking track obtaining unit 1, a water pressure change detection unit 2, a rotating speed conversion direction judgment unit 3 and a rotating speed adjusting unit 4. The maximum power point tracking track obtaining unit 1 calculates and obtains a maximum power point tracking track of the water pump motor according to actual conditions. The water pressure change detection unit 2 detects a change in water pressure at the outlet water by a sensor. The rotating speed changing direction judging unit 3 judges the rotating speed changing directions of the two water pump motors according to the water pressure changing condition. The rotating speed adjusting unit 4 adjusts the rotating speeds of the two water pump motors according to the water pressure change condition and the rotating speed change direction of the water pump motors.
In a preferred embodiment, the maximum power point tracking trajectory obtaining unit 1 includes: the device comprises a water pump motor power curve drawing unit and a maximum power point tracking track drawing unit. The water pump motor power curve drawing unit is used for determining the water density in the working environment of the water pump, the gravity acceleration of the working environment, the required lift of the water pump, the radius of a water pump impeller and the area of a region swept by a motor rotor blade, and drawing water pump motor power curves in different unit time under the flow rate of inlet water flow; the maximum power point tracking track drawing unit is used for finding out the maximum points of the power curves of the water pump motor under the inflow water flow in different unit time, and connecting the maximum points into a curve to obtain a maximum power point tracking curve.
In a preferred embodiment, the water pressure change detecting unit can specifically detect the water pressure change by the following method: judging that the water supply voltage needs to be increased and the rotating speeds of the two water pump motors need to be increased if the water pressure at the water outlet detected by the sensor is reduced; if the water pressure at the water outlet position detected by the sensor is increased, the water supply voltage needs to be reduced, and the rotating speeds of the two water pump motors need to be reduced.
In a preferred embodiment, the rotation speed adjusting unit further comprises: a power control unit and a rotation speed control unit. The power control unit is used for controlling the two motors according to the obtained maximum power point tracking curve, so that the power correspondingly output at the current rotating speed of the two motors is matched with the maximum power point tracking curve no matter how the rotating speed is when the two motors operate; the rotating speed control unit is used for controlling the rotating speeds of the two water pump motors to be simultaneously increased if the rotating speeds of the water pump motors need to be increased according to the judgment of the rotating speed changing direction judging unit; and if the rotating speed of the water pump motors needs to be reduced, controlling the rotating speeds of the two water pump motors to be reduced simultaneously.
Fig. 5 is a schematic diagram of a control system of a constant pressure water supply pump according to a preferred embodiment of the present invention. Referring to fig. 5, in order to better achieve the preset control target, on the basis of the embodiment shown in fig. 4, a preset control target unit 5 may be further included, for controlling the rotation speed and the power of the water pump motor to reach the preset control target. Specifically, the preset control target unit further judges whether the rotating speed of the water pump motor reaches a preset control target, if so, the water pump motor is controlled to stably operate at the current working point, and the change of the water pressure at the next water outlet is waited; if not, the rotating speed is continuously adjusted.
On the basis of the above embodiment, in another embodiment of the present invention, there is further provided a readable storage medium, on which a computer program is stored, the program being used for executing the control method of the constant pressure water supply water pump of any one of the above embodiments when executed by a processor.
According to the embodiment of the invention, by controlling the two water pump motors to operate on the power curve of the water pump motors, the requirement of the water supply pressure of the water pump can be met, the total output power can be greatly increased, the total efficiency is also greatly increased, unnecessary loss of a water pump system is reduced, and the control method is more energy-saving and environment-friendly than the traditional control method.
It should be noted that, the steps in the method provided by the present invention may be implemented by using corresponding modules, devices, units, and the like in the system, and those skilled in the art may implement the step flow of the method with reference to the technical solution of the system, that is, the embodiment in the system may be understood as a preferred example for implementing the method, and details are not described here.
Those skilled in the art will appreciate that, in addition to implementing the system and its various devices provided by the present invention in purely computer readable program code means, the method steps can be fully programmed to implement the same functions by implementing the system and its various devices in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system and various devices thereof provided by the present invention can be regarded as a hardware component, and the devices included therein for realizing various functions can also be regarded as structures in the hardware component; means for performing the functions may also be regarded as structures within both software modules and hardware components for performing the methods.
The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and not to limit the invention. Any modifications and variations within the scope of the description, which may occur to those skilled in the art, are intended to be within the scope of the invention.
Claims (10)
1. A control method of a constant-pressure water supply pump is characterized by comprising the following steps:
determining a maximum power point tracking track of a water pump motor;
detecting the change condition of the water pressure at the water outlet of the water pump;
judging the rotating speed change directions of the two water pump motors according to the change condition of the water pressure at the water outlet;
adjusting the rotating speeds of the two water pump motors according to the change condition of the water pressure at the water outlet and the rotating speed change direction of the water pump motors so as to enable the power correspondingly output at the current rotating speed to be matched with the maximum power point tracking track; controlling two water pump motors according to the obtained maximum power point tracking curve, so that the power correspondingly output at the current rotating speed of the two water pump motors is matched with the maximum power point tracking curve no matter how the rotating speed is when the two water pump motors operate;
the determining of the maximum power point tracking track of the water pump motor comprises the following steps:
determining the water density of the water pump in the working environment, the gravity acceleration of the working environment, the lift required by the water pump, the radius of a water pump impeller and the area of a region swept by a motor rotor blade, and drawing a power curve graph of a water pump motor under the flow of inlet water flow in different unit time;
and finding out the highest points of the power curves of the water pump motors under the inflow water flow in different unit time, and connecting the highest points into a curve to obtain a maximum power point tracking curve, namely a maximum power point tracking track.
2. The method for controlling a constant pressure water supply pump according to claim 1, wherein the detecting a change in water pressure at the water outlet of the pump comprises:
detecting by using a sensor, and if the sensor detects that the water pressure at the water outlet is not changed, continuously keeping the original running state; and if the change of the water pressure at the water outlet is detected, judging whether the water pressure is increased or decreased.
3. The method for controlling a constant pressure water supply pump according to claim 1, wherein the determining the rotation speed change direction of two water pump motors according to the change of the water pressure at the water outlet comprises:
if the detected water pressure at the water outlet part is reduced, the water supply voltage needs to be increased, and the rotating speeds of the two water pump motors need to be increased;
if the detected water pressure at the water outlet is increased, the water supply voltage needs to be reduced, and the rotating speeds of the two water pump motors need to be reduced.
4. The control method of a constant pressure water supply pump according to claim 3, wherein the rotational speeds of two water pump motors are adjusted, wherein:
according to the judgment of the rotating speed change directions of the two water pump motors, if the rotating speeds of the water pump motors need to be increased, the rotating speeds of the two water pump motors are controlled to be increased simultaneously; and if the rotating speed of the water pump motors needs to be reduced, controlling the rotating speeds of the two water pump motors to be reduced simultaneously.
5. The method for controlling a constant pressure water supply pump according to any one of claims 1 to 4, further comprising, after adjusting the rotation speeds of the two water pump motors: controlling the rotating speed and the power of the water pump motor to reach a preset control target; wherein the content of the first and second substances,
judging whether the rotating speed of the water pump motor reaches a preset control target, if so, controlling the water pump motor to stably operate at the current working point, and waiting for the change of the water pressure at the next water outlet; if not, continuing to adjust the rotating speed until reaching the preset control target.
6. A control system of a constant pressure water supply pump, comprising:
a maximum power point tracking track obtaining unit for determining a maximum power point tracking track of the water pump motor;
the water pressure change detection unit is used for detecting the change condition of the water pressure at the water outlet of the water pump;
the rotating speed change direction judging unit is used for judging the rotating speed change directions of the two water pump motors according to the change condition of the water pressure at the water outlet position detected by the water pressure change detecting unit;
the rotating speed adjusting unit is used for adjusting the rotating speeds of the two water pump motors according to the change condition of the water pressure at the water outlet part detected by the water pressure change detecting unit and the rotating speed change direction of the water pump motors judged by the rotating speed change direction judging unit so as to enable the power correspondingly output at the current rotating speed to be matched with the maximum power point tracking track;
the maximum power point tracking trajectory obtaining unit includes:
the water pump motor power curve drawing unit is used for drawing a water pump motor power curve under the water inflow flow in different unit time according to the water density under the water pump working environment, the gravity acceleration of the working environment, the required lift of the water pump, the radius of a water pump impeller and the area of a region swept by a motor rotor blade;
the maximum power point tracking trajectory drawing unit is used for finding out the highest points of the power curves of the water pump motor under the inflow water flow in different unit time according to the power curve graph of the water pump motor power curve drawing unit, and connecting the highest points into a curve to obtain a maximum power point tracking curve;
the rotational speed adjusting unit includes:
and the power control unit controls the two motors according to the obtained maximum power point tracking curve, so that the power correspondingly output at the current rotating speed of the two motors is matched with the maximum power point tracking curve no matter how the rotating speed is during operation.
7. The control system of the constant pressure water supply pump according to claim 6, wherein the water pressure variation detecting unit makes a judgment based on a sensor detection result, wherein:
if the water pressure at the water outlet position detected by the sensor is reduced, the water supply voltage needs to be increased, and the rotating speeds of the two water pump motors need to be increased;
if the water pressure at the water outlet position detected by the sensor is increased, the water supply voltage needs to be reduced, and the rotating speeds of the two water pump motors need to be reduced.
8. The control system of the constant pressure water-supplying pump as claimed in claim 7, wherein the rotation speed adjusting unit further comprises:
the rotating speed control unit controls the rotating speeds of the two water pump motors to be simultaneously increased if the rotating speeds of the water pump motors need to be increased according to the judgment of the rotating speed conversion direction judgment unit; and if the rotating speed of the water pump motors needs to be reduced, controlling the rotating speeds of the two water pump motors to be reduced simultaneously.
9. The control system of the constant pressure water-supplying pump as claimed in any one of claims 6 to 8, further comprising: the preset control target unit is used for controlling the rotating speed and the power of the water pump motor to reach a preset control target.
10. A readable storage medium, on which a computer program is stored which, when being executed by a processor, is adapted to carry out the method of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110339854.2A CN113047378B (en) | 2021-03-30 | 2021-03-30 | Control method and system of constant-pressure water supply water pump and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110339854.2A CN113047378B (en) | 2021-03-30 | 2021-03-30 | Control method and system of constant-pressure water supply water pump and medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113047378A CN113047378A (en) | 2021-06-29 |
| CN113047378B true CN113047378B (en) | 2023-02-10 |
Family
ID=76516461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110339854.2A Active CN113047378B (en) | 2021-03-30 | 2021-03-30 | Control method and system of constant-pressure water supply water pump and medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113047378B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4165951A (en) * | 1977-06-30 | 1979-08-28 | Amtrol Incorporated | Water pressure booster system and control valve therefor |
| CN103485386B (en) * | 2013-09-10 | 2014-12-24 | 温州大学 | Variable frequency constant-pressure water supply system control method based on gray correlation method |
| CN104196088A (en) * | 2014-09-09 | 2014-12-10 | 江南大学 | Frequency conversion speed regulation and constant pressure pipe network water supply system and control method thereof |
| CN106284520A (en) * | 2016-08-26 | 2017-01-04 | 上海亨公电线电缆有限公司 | Inequality based on PLC synchronizes constant pressure water supply system and control method thereof |
| CN107326959B (en) * | 2017-06-15 | 2019-06-11 | 温州大学 | A kind of parallel water service system output flow balance control method |
-
2021
- 2021-03-30 CN CN202110339854.2A patent/CN113047378B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113047378A (en) | 2021-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2019148771A1 (en) | Method and apparatus for primary frequency control of wind power generator | |
| JP7153676B2 (en) | Wind Turbine Operation During Grid Loss Using Energy Storage Units | |
| KR101408675B1 (en) | Booster pump system and its control method | |
| US9065361B2 (en) | Hybrid construction machine | |
| WO2013078915A1 (en) | Power matching system for electronic control engine and variable capacity hydraulic pump and the method thereof | |
| CN105074232A (en) | Construction machine | |
| CN103452608B (en) | A kind of control gear for condensate system and controlling method | |
| CN110529373B (en) | Control method, system and device for water pumping energy-saving peak regulation | |
| KR20160017960A (en) | The optimal control method of inverter booster pump | |
| CN104567172A (en) | Intelligent water-cooling system with automatic adjustment capability | |
| CN113047378B (en) | Control method and system of constant-pressure water supply water pump and medium | |
| CN114576806A (en) | Central air-conditioning cooling water system energy-saving optimization method based on variable frequency control | |
| JP2014214710A (en) | Fluid device | |
| US20150093255A1 (en) | Method and arrangement for controlling a solar powered pump | |
| US11118558B2 (en) | Hydroelectric power generation system | |
| KR102639064B1 (en) | Hydroelectric power system and control method | |
| CN109873592B (en) | Voltage-regulating energy-saving control system and control method for motor of oil pumping unit | |
| CN203962058U (en) | A kind of control gear for condensate system | |
| JP6916293B2 (en) | Hydropower grid interconnection system | |
| CN201916173U (en) | Energy-saving electric drive system of ship cooling water pump | |
| CN113424434A (en) | Hydroelectric power generation system | |
| CN114992107B (en) | Optimal control method and system for multi-pump silt conveying system based on minimum energy consumption | |
| JP2005220753A (en) | Horizontal axis windmill and its control method | |
| CN113623166B (en) | Control method of multi-pump parallel photovoltaic pumping system, inverter and photovoltaic pumping system | |
| CN114737640B (en) | Efficient operation and early warning method and device for intelligent mute anti-flooding water supply equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |