CN112727743B - Control method and device for multi-water pump system, control terminal and storage medium - Google Patents
Control method and device for multi-water pump system, control terminal and storage medium Download PDFInfo
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- CN112727743B CN112727743B CN202011621319.8A CN202011621319A CN112727743B CN 112727743 B CN112727743 B CN 112727743B CN 202011621319 A CN202011621319 A CN 202011621319A CN 112727743 B CN112727743 B CN 112727743B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention is applicable to the technical field of artificial intelligence, and provides a control method, a device, a control terminal and a storage medium of a multi-water pump system, wherein the method comprises the following steps: acquiring a target flow value of a multi-water pump system; solving and calculating an objective function established by taking the sum of the powers of all fixed-frequency water pumps and variable-frequency water pumps in the multi-water pump system as a target according to at least the target flow as a constraint condition to obtain the target power of each water pump; and controlling each water pump in the multi-water pump system to respond to the corresponding target power value. According to the invention, the sum of the powers of the water pumps in the multi-water pump system is taken as the objective function, the constraint condition is constructed according to the target flow value, and the target power meeting the constraint condition is calculated, so that the consumption of the water pumps is the lowest under the target power, and the optimization of the water pumps is realized.
Description
Technical Field
The invention belongs to the technical field of artificial intelligence, and particularly relates to a control method, a device, a control terminal and a storage medium of a multi-water pump system.
Background
In industrial production, the water pump consumes a large amount of energy, and how to reduce the energy consumption of the water pump is the key of energy conservation. In actual production, a plurality of water pumps are generally used. Generally, the use of a variable frequency pump greatly reduces energy consumption, as the variable frequency pump can adjust the input according to the amount of water required, reducing unnecessary energy waste. However, if all water pumps are subjected to frequency conversion, the investment of the prior stage or the transformation is greatly increased, and the economic type of the project is influenced. Therefore, how to reduce the energy consumption under the condition of adopting frequency conversion for part of water pumps in the multi-water pump system is a current technical problem.
Disclosure of Invention
In view of the above, the embodiments of the present invention provide a method, an apparatus, a control terminal, and a storage medium for controlling a multi-pump system, so as to solve the problem of how to reduce energy consumption under the condition of adopting frequency conversion for part of the pumps in the multi-pump system.
In a first aspect of an embodiment of the present invention, a control method of a multi-water pump system is provided, including: acquiring a target flow value of a multi-water pump system; solving and calculating an objective function established by taking the sum of the powers of all fixed-frequency water pumps and variable-frequency water pumps in the multi-water pump system as a target according to at least the target flow as a constraint condition to obtain the target power of each water pump; and controlling each water pump in the multi-water pump system to respond to the corresponding target power value.
In some alternative embodiments, the multiple water pump system includes a parallel configuration and a series configuration.
In some alternative embodiments, when the multiple water pump system is a parallel configuration, the constraints include: and constraining the lifts of the fixed-frequency water pump and the variable-frequency water pump, wherein the lifts of the fixed-frequency water pump and the variable-frequency water pump are in a same preset range, and the lifts of the fixed-frequency water pump and the variable-frequency water pump are in direct proportion to the quadratic powers of the frequencies of the fixed-frequency water pump and the variable-frequency water pump.
In some alternative embodiments, when the multiple water pump system is a series configuration, the constraints include: and constraining the flow of the fixed-frequency water pump and the variable-frequency water pump, wherein the flow of each fixed-frequency water pump and the variable-frequency water pump is in a close same preset range, and the flow of each fixed-frequency water pump and the variable-frequency water pump is in direct proportion to the first power of the frequency of each fixed-frequency water pump and the variable-frequency water pump.
In some alternative embodiments, the objective function specifically includes: and the minimum value of the sum of the power of each fixed-frequency water pump and the power of the variable-frequency water pump in the working state, wherein the power of the fixed-frequency water pump is in direct proportion to the power of the frequency, and the power of the variable-frequency water pump is in direct proportion to the power of the frequency.
In some alternative embodiments, the constraints further include: and the sum of the flow rates of all the fixed-frequency water pumps and the variable-frequency water pumps in the working state in the multi-water pump system is larger than or equal to the target flow value, wherein the flow rates of the fixed-frequency water pumps and the variable-frequency water pumps are in direct proportion to the primary power of the respective frequencies.
In some alternative embodiments, solving the objective function established with the aim of minimizing the sum of the power of all fixed frequency water pumps and variable frequency water pumps in the multi-water pump system to obtain the objective power of each water pump comprises: and solving and calculating an objective function established by taking the sum of the powers of all the fixed-frequency water pumps and the variable-frequency water pumps in the multi-water pump system as a target by utilizing a genetic algorithm to obtain the objective power of each water pump.
In a second aspect of the embodiment of the present invention, there is provided a control device for a multi-water pump system, including: the target flow acquisition module is used for acquiring a target flow value of the multi-water pump system; the water pump power optimization module is used for solving and calculating an objective function established by taking the sum of the powers of all fixed-frequency water pumps and variable-frequency water pumps in the multi-water pump system as a target according to at least the target flow as a constraint condition to obtain the target power of each water pump; and the water pump power control module is used for controlling each water pump in the multi-water pump system to respond to the corresponding target power value.
In a third aspect of an embodiment of the present invention, there is provided a control terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to any one of the first aspects when executing the computer program.
In a fourth aspect of embodiments of the present invention, there is provided a storage medium storing a computer program which, when executed by a processor, implements the steps of the method according to any of the first aspects.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: according to the invention, the power of the water pump is optimized and calculated by establishing the objective function and the constraint condition for the multi-water pump system, and under the condition that only part of the water pumps are variable-frequency pumps, the operation optimization of the system is realized, the energy consumption is reduced, and a large amount of cost is saved for enterprises.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a control method of a multi-pump system according to the first embodiment;
FIG. 2 is a calculation of an exemplary objective function using a genetic algorithm;
fig. 3 is a schematic structural diagram of a control device of a multi-pump system according to a second embodiment;
fig. 4 is a schematic diagram of a control terminal of some embodiments of a control device of a multi-pump system and a control method of the multi-pump system that are further provided in the third embodiment.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to illustrate the technical scheme of the invention, the following description is made by specific examples.
Example 1
Fig. 1 is a flowchart of a control method of a multi-pump system according to the first embodiment, and, with reference to fig. 1, the control method of the multi-pump system at least includes the following steps S101 to S103.
S101, acquiring a target flow value of the multi-water pump system.
The target flow value is the target flow of the pump required by the multi-pump system, and can be changed according to the system requirement.
S102, solving and calculating an objective function established by taking the sum of the powers of all fixed-frequency water pumps and variable-frequency water pumps in the multi-water pump system as a target to obtain the objective power of each water pump at least according to the objective flow as a constraint condition.
Wherein, because the multi-water pump system comprises at least one fixed-frequency water pump and at least one variable-frequency water pump. Thus, the objective function includes the sum of all the powers of the constant frequency water pump and the variable frequency water pump.
Specifically, in one example one, the objective function may specifically include: and the minimum value of the sum of the power of each fixed-frequency water pump and the power of the variable-frequency water pump in the working state, wherein the power of the fixed-frequency water pump is in direct proportion to the power of the frequency, and the power of the variable-frequency water pump is in direct proportion to the power of the frequency.
For example, assume that there are 6 fixed frequency pumps and 2 variable frequency pumps in a multiple pump system, where x is used 1 、 x 2 、x 3 、x 4 、x 5 And x 6 Indicating the working state of 6 fixed-frequency water pumps and using x 7 And x 8 Representing the states of 2 variable-frequency water pumps, wherein the states comprise an operating state and a stopping state, x is 1 ,…x 8 ∈[0,1]0 generation of a stop state, and 1 represents a working state; and, with x 9 ，x 10 Representing the frequency of 2 variable-frequency water pumps by x 11 ,…x 16 =50 represents the frequency of the remaining 6 constant frequency water pumps, i.e. the frequency is 50HZ; in addition, the power of the constant-frequency water pump is represented by P, and the power of the variable-frequency water pump is proportional to the power of the variable-frequency water pump. Thus, the objective function established with the aim of minimizing the sum of the power of all the constant-frequency water pumps and variable-frequency water pumps in the multi-water pump system can be expressed as:
wherein the lambda is 1 And lambda (lambda) 2 And depends on factory information of the variable-frequency water pump.
Specifically, in one example two, the constraint includes: and the sum of the flow rates of all the fixed-frequency water pumps and the variable-frequency water pumps in the working state in the multi-water pump system is larger than or equal to the target flow value, wherein the flow rates of the fixed-frequency water pumps and the variable-frequency water pumps are in direct proportion to the primary power of the respective frequencies.
For example, assuming that the target flow value is denoted by q, since the flow rates of the constant frequency water pump and the variable frequency water pump are proportional to the powers of the respective frequencies, the constraint conditions may include, in combination with the example of one of the above examples:
wherein, alpha is a coefficient, and the value of alpha depends on the respective factory information of the water pump.
In practice, the multi-pump system includes a parallel structure and a serial structure, that is, each fixed-frequency pump and each variable-frequency pump may be connected in parallel or in series.
Specifically, in one example three, when the multiple water pump system is of a parallel structure, the constraint condition includes: and constraining the lifts of the fixed-frequency water pump and the variable-frequency water pump, wherein the lifts of the fixed-frequency water pump and the variable-frequency water pump are in a same preset range, and the lifts of the fixed-frequency water pump and the variable-frequency water pump are in direct proportion to the quadratic powers of the frequencies of the fixed-frequency water pump and the variable-frequency water pump.
For example, also for the above example, assuming that the same preset range of head ranges from 40 to 50, the head constraints for the fixed frequency water pump and the variable frequency water pump may specifically include:
wherein beta is a coefficient, beta 1 And beta 2 The value of (2) depends on the respective factory information of the water pump.
Specifically, in one example four, when the multiple water pump system is of a serial configuration, the constraint condition includes: and constraining the flow of the fixed-frequency water pump and the variable-frequency water pump, wherein the flow of each fixed-frequency water pump and the variable-frequency water pump is in a close same preset range, and the flow of each fixed-frequency water pump and the variable-frequency water pump is in direct proportion to the first power of the frequency of each fixed-frequency water pump and the variable-frequency water pump.
Since the constraint principle of this example is the same as that of the third example, a detailed description thereof will be omitted.
Further, in an example fifth, in the step S102, it may specifically include: and solving and calculating an objective function established by taking the sum of the powers of all the fixed-frequency water pumps and the variable-frequency water pumps in the multi-water pump system as a target by utilizing a genetic algorithm to obtain the objective power of each water pump.
For example, the objective function in example one above is solved using the getpy optimization package in python, with constraints shown in examples two and three, where the objective flow value q is 420,1-2 pump is variable frequency pump, and the pump No. 3-8 is constant frequency pump, and specific parameters are shown in tables 1 and 2 below:
| variable-frequency water pump | α | β | λ |
| No. 1 pump | 2.22 | 0.018 | 0.008 |
| No. 2 pump | 2.22 | 0.018 | 0.008 |
TABLE 1
| Fixed-frequency water pump | No. 3 pump | No. 4 pump | No. 5 pump | No. 6 pump | No. 7 pump | No. 8 pump |
| power/KW | 931.12 | 974.77 | 843.83 | 785.64 | 989.32 | 1003.87 |
TABLE 2
In this regard, see fig. 2 again, which shows the result of calculation of the objective function by the genetic algorithm, the total power is 3575KW, the 1 st, 2 nd, 5 th and 6 th variable frequency water pumps are opened for 4 th, and the frequency of the 1 st and 2 nd variable frequency water pumps is 49.55Hz (2 is reserved as a fraction).
S103, controlling each water pump in the multi-water pump system to respond to the corresponding target power value.
For the example, according to the calculation result, the water pumps 1,2,5 and 6 can be controlled to work, wherein the power of the fixed-frequency water pump is as shown in table 1, and the frequency of the variable-frequency water pump is 49.55Hz.
In summary, in the first embodiment, the objective function and the constraint condition are established for the multi-pump system to perform optimization calculation on the power of the pump, so that the operation optimization of the system is realized, the energy consumption is reduced, and a large amount of cost is saved for enterprises under the condition that only part of the pumps are variable-frequency pumps.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
Example two
Under the same inventive concept, the second embodiment also provides a control device of the multi-water pump system.
Referring to fig. 3, a schematic structural diagram of a control device of a multi-water pump system according to a second embodiment is shown in fig. 3, and the control device 300 of the multi-water pump system includes: a target flow obtaining module 301, configured to obtain a target flow value of the multi-water pump system; the water pump power optimization module 302 is configured to solve and calculate an objective function established by minimizing the sum of the powers of all the fixed-frequency water pumps and the variable-frequency water pumps in the multi-water pump system according to at least the target flow as a constraint condition, so as to obtain a target power of each water pump; and the water pump power control module 303 is configured to control each water pump in the multi-water pump system to respond to a corresponding target power value.
In some embodiments, the multiple water pump system includes a parallel configuration and a series configuration.
In some embodiments, the water pump power optimization module 302 includes: and a head restraint unit configured to, when the multiple water pump system is of a parallel structure, the restraint conditions include: and restricting the lifts of the fixed-frequency water pump and the variable-frequency water pump, wherein the lifts of the fixed-frequency water pump and the variable-frequency water pump are in a same preset range, and the lifts of the fixed-frequency water pump and the variable-frequency water pump are in direct proportion to the quadratic powers of the respective frequencies.
In some embodiments, the water pump power optimization module 302 includes: a flow restriction unit configured to, when the multiple water pump system is of a serial configuration, the restriction conditions include: and constraining the flow of the fixed-frequency water pump and the variable-frequency water pump, wherein the flow of each fixed-frequency water pump and the variable-frequency water pump is in a close same preset range, and the flow of each fixed-frequency water pump and the variable-frequency water pump is in direct proportion to the first power of the frequency of each fixed-frequency water pump and the variable-frequency water pump.
In some embodiments, the water pump power optimization module 302 includes: the objective function obtaining unit is configured to obtain an objective function, and specifically includes: and the minimum value of the sum of the power of each fixed-frequency water pump and the power of the variable-frequency water pump in the working state, wherein the power of the fixed-frequency water pump is in direct proportion to the power of the frequency, and the power of the variable-frequency water pump is in direct proportion to the power of the frequency.
In some embodiments, the water pump power optimization module 302 includes: a target flow restriction unit configured to restrict the conditions further including: and the sum of the flow rates of all the fixed-frequency water pumps and the variable-frequency water pumps in the working state in the multi-water pump system is larger than or equal to the target flow value, wherein the flow rates of the fixed-frequency water pumps and the variable-frequency water pumps are in direct proportion to the primary power of the respective frequencies.
In some embodiments, the water pump power optimization module 302 includes: and the objective function solving unit is configured to solve and calculate an objective function established by taking the sum of the powers of all fixed-frequency water pumps and variable-frequency water pumps in the multi-water pump system as a target by utilizing a genetic algorithm, so as to obtain the objective power of each water pump.
Since the first embodiment and the second embodiment belong to the same inventive concept, and have the same specific technical features, the specific technical content can refer to the first embodiment, and the description thereof is omitted herein.
Example III
Referring to fig. 4, the third embodiment further provides a control terminal to which the above-mentioned control method of the multi-water pump system and some embodiments of the control device of the multi-water pump system can be applied, as shown in fig. 4, the control terminal 400 includes: a processor 401, a memory 402 and a computer program 403 stored in the memory 402 and executable on the processor 401. The processor 401, when executing the computer program 403, implements the steps in the above-described embodiments of the control method of each multiple water pump system, such as steps S101 to S103 shown in fig. 1. Alternatively, the processor 401 may implement the functions of the modules/units in the above-described embodiments of the apparatus, such as the functions of the modules 301 to 303 shown in fig. 3, when executing the computer program 403.
Illustratively, the computer program 403 may be partitioned into one or more modules/units that are stored in the memory 402 and executed by the processor 401 to complete the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program 403 in the control terminal 400. For example, the computer program 403 may be divided into a target flow acquisition module 301, a pump power optimization module 302, and a pump power control module 303, each of which specifically functions as follows: the target flow obtaining module 301 is configured to obtain a target flow value of the multi-water pump system; the water pump power optimization module 302 is configured to solve and calculate an objective function established by minimizing the sum of the powers of all the fixed-frequency water pumps and the variable-frequency water pumps in the multi-water pump system according to at least the target flow as a constraint condition, so as to obtain a target power of each water pump; and the water pump power control module 303 is configured to control each water pump in the multi-water pump system to respond to a corresponding target power value.
The control terminal 400 may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc. The control terminal 400 may include, but is not limited to, a processor 401, a memory 402. It will be appreciated by those skilled in the art that fig. 4 is merely an example of the control terminal 400 and does not constitute a limitation of the control terminal 400, and may include more or less components than those illustrated, or may combine certain components, or different components, e.g., the control terminal 400 may further include input and output devices, network access devices, buses, etc.
The processor 401 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 402 may be an internal storage unit of the control terminal 400, for example, a hard disk or a memory of the control terminal 400. The memory 402 may also be an external storage device of the control terminal 400, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the control terminal 400. Further, the memory 402 may also include both an internal storage unit and an external storage device of the control terminal 400. The memory 402 is used to store the computer program and other programs and data required by the control terminal 400. The memory 402 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by instructing related hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of the method embodiment of the above respective multi-pump system when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A method of controlling a multiple water pump system, comprising:
acquiring a target flow value of a multi-water pump system;
solving and calculating an objective function established by taking the sum of the powers of all fixed-frequency water pumps and variable-frequency water pumps in the multi-water pump system as a target to obtain the objective power of each water pump at least according to the objective flow as a constraint condition, wherein the objective function is as follows:
；
wherein the saidAnd->Is dependent on factory information of the variable-frequency water pump, < ->、/>、/>、/>、/>And->Indicating the working state of 6 fixed-frequency water pumps, < >>And->Representing the state of 2 variable-frequency water pumps +.>Representing the frequency of the 2 variable frequency water pumps, < >>Representing 6 constant frequenciesThe power of the water pump;
the constraint conditions are as follows:；
wherein, the liquid crystal display device comprises a liquid crystal display device,is a coefficient of->The value of (2) depends on the respective delivery information of the water pump, q is a natural number, and the value of (2) is->Representing the frequency of the 6 constant-frequency water pumps;
and controlling each water pump in the multi-water pump system to respond to the corresponding target power value.
2. The method of claim 1, wherein the multiple water pump system comprises a parallel structure and a series structure.
3. The method of controlling a multiple water pump system according to claim 2, wherein when the multiple water pump system is of a parallel structure, the constraint condition includes: and constraining the lifts of the fixed-frequency water pump and the variable-frequency water pump, wherein the lifts of the fixed-frequency water pump and the variable-frequency water pump are in a same preset range, and the lifts of the fixed-frequency water pump and the variable-frequency water pump are in direct proportion to the quadratic powers of the frequencies of the fixed-frequency water pump and the variable-frequency water pump.
4. A control method of a multiple water pump system according to claim 3, wherein when the multiple water pump system is of a serial configuration, the constraint condition includes: and constraining the flow of the fixed-frequency water pump and the variable-frequency water pump, wherein the flow of each fixed-frequency water pump and the variable-frequency water pump is in a close same preset range, and the flow of each fixed-frequency water pump and the variable-frequency water pump is in direct proportion to the first power of the frequency of each fixed-frequency water pump and the variable-frequency water pump.
5. The method for controlling a multiple water pump system according to any one of claims 1 to 4, wherein the objective function specifically comprises: and the minimum value of the sum of the power of each fixed-frequency water pump and the power of the variable-frequency water pump in the working state, wherein the power of the fixed-frequency water pump is in direct proportion to the power of the frequency, and the power of the variable-frequency water pump is in direct proportion to the power of the frequency.
6. The method of claim 5, wherein the constraints further comprise: and the sum of the flow rates of all the fixed-frequency water pumps and the variable-frequency water pumps in the working state in the multi-water pump system is larger than or equal to the target flow value, wherein the flow rates of the fixed-frequency water pumps and the variable-frequency water pumps are in direct proportion to the primary power of the respective frequencies.
7. The method according to claim 6, wherein solving and calculating an objective function established with a goal of minimizing a sum of powers of all fixed-frequency water pumps and variable-frequency water pumps in the multi-water pump system to obtain a target power of each water pump, comprises: and solving and calculating an objective function established by taking the sum of the powers of all the fixed-frequency water pumps and the variable-frequency water pumps in the multi-water pump system as a target by utilizing a genetic algorithm to obtain the objective power of each water pump.
8. A control device of a multiple water pump system, comprising:
the target flow acquisition module is used for acquiring a target flow value of the multi-water pump system;
the water pump power optimization module is used for solving and calculating an objective function established by taking the sum of the powers of all fixed-frequency water pumps and variable-frequency water pumps in the multi-water pump system as a target according to at least the target flow as a constraint condition to obtain the target power of each water pump, wherein the objective function is as follows:
；
wherein the saidAnd->Is dependent on factory information of the variable-frequency water pump, < ->、/>、/>、/>、/>And->Indicating the working state of 6 fixed-frequency water pumps, < >>And->Representing the state of 2 variable-frequency water pumps +.>Representing the frequency of the 2 variable frequency water pumps, < >>The power of 6 constant-frequency water pumps is represented;
the constraint conditions are as follows:；
wherein, the liquid crystal display device comprises a liquid crystal display device,is a coefficient of->The value of (2) depends on the respective delivery information of the water pump, q is a natural number, and the value of (2) is->Representing the frequency of the 6 constant-frequency water pumps; and the water pump power control module is used for controlling each water pump in the multi-water pump system to respond to the corresponding target power value.
9. A control terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any one of claims 1 to 7 when the computer program is executed.
10. A storage medium storing a computer program which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 7.
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