CN109322818B - Water pump set control method and device - Google Patents
Water pump set control method and device Download PDFInfo
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- CN109322818B CN109322818B CN201811519767.XA CN201811519767A CN109322818B CN 109322818 B CN109322818 B CN 109322818B CN 201811519767 A CN201811519767 A CN 201811519767A CN 109322818 B CN109322818 B CN 109322818B
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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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Abstract
The invention provides a water pump set control method and a device, which are used for controlling a parallel water pump set and comprise the following steps: calculating a total quadratic control curve for controlling the parallel water pump sets when debugging the parallel water pump sets; calculating the real-time flow needing to be transmitted by the parallel water pump set; selecting at least one water pump to be operated from the parallel water pump groups as a target water pump group according to the real-time flow and preset performance data of the parallel water pump groups; calculating a target quadratic control curve for controlling the target water pump set according to the total quadratic control curve and the performance data of the parallel water pump set; and controlling the target water pump set to operate according to the target quadratic control curve. The water pump set control method and the water pump set control device can rapidly switch the pump with proper flow according to the real-time flow of the system requirement, are favorable for improving the working efficiency and have high stability.
Description
Technical Field
The invention relates to the technical field of data communication, in particular to a control method and a control device for a water pump set.
Background
In industrial fluid treatment and daily life, pumps are widely used, for example, for transporting fluids such as water, gas, oil, acid-base liquid, emulsion, suspoemulsion, liquid elementary substance, metal, etc., and also for transporting liquids, gas mixtures, and liquids containing suspended solids, etc. The existing method for controlling the pump can control a plurality of pumps with the same performance to work through a control system, because the performance of each pump is basically consistent, the calculated efficiency critical point is relatively fixed and hardly changed, and the difference of the calculation result is extremely small, so that all the pumps are controlled to operate according to the result of one-time calculation during control. However, in practice, when the flow rate required by the system changes, the pump with the proper flow rate cannot be switched quickly, and therefore, the working efficiency and the stability are low.
Disclosure of Invention
In view of the above problems, the present invention provides a method and an apparatus for controlling a water pump set, which can rapidly switch a pump with a suitable flow rate according to a real-time flow rate required by a system, and are beneficial to improving work efficiency and high in stability.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a water pump set control method in a first aspect, which is used for controlling a parallel water pump set and comprises the following steps:
calculating a total quadratic control curve for controlling the parallel water pump set when the parallel water pump set is debugged;
calculating the real-time flow required to be transmitted by the parallel water pump set;
selecting at least one water pump to be operated from the parallel water pump groups as a target water pump group according to the real-time flow and preset performance data of the parallel water pump groups;
calculating a target quadratic control curve for controlling the target water pump set according to the total quadratic control curve and the performance data of the parallel water pump set;
and controlling the target water pump set to operate according to the target quadratic control curve.
As an optional implementation manner, in the first aspect of the present invention, after controlling the operation of the target water pump group according to the target quadratic control curve, the method further includes:
recalculating the real-time transmission flow of the target water pump set during operation;
judging whether the target water pump set needs to be adjusted or not according to the real-time transmission flow;
if the target water pump set needs to be adjusted, reselecting at least one water pump to be operated from the parallel water pump sets as a new target water pump set according to the real-time transmission flow and preset parallel water pump set performance data;
calculating a target quadratic control curve for controlling the new target water pump set according to the total quadratic control curve and the performance data of the parallel water pump set;
and continuously controlling the new target water pump set to operate according to the target quadratic control curve.
As an optional implementation manner, in the first aspect of the present invention, the calculating a total quadratic control curve for controlling the parallel water pump groups when the parallel water pump groups are debugged includes:
when the parallel water pump group is debugged, acquiring the water pump lift when the parallel water pump group operates according to a preset flow;
acquiring water pump pressure data when the parallel water pump set operates according to a preset zero flow;
and calculating a total quadratic control curve for controlling the parallel water pump set according to the preset flow, the water pump lift, the zero flow and the water pump pressure data.
As an optional implementation manner, in the first aspect of the present invention, the calculating a real-time flow rate required to be transmitted by the parallel water pump group includes:
acquiring the temperature difference of supply water and return water of the parallel water pump set;
and calculating the real-time flow required to be transmitted by the parallel water pump set according to a preset standard flow, a preset standard temperature difference and the supply and return water temperature difference.
As an optional implementation manner, in the first aspect of the present invention, the controlling the operation of the target water pump group according to the target quadratic control curve includes:
calculating an efficiency flow curve of the target water pump set according to the target quadratic control curve and the performance data of the parallel water pump set;
calculating real-time operation data corresponding to the target water pump according to the efficiency flow curve;
and controlling the target water pump set to operate according to the real-time operation data and the efficiency flow curve.
As an alternative embodiment, in the first aspect of the present invention, the real-time operation data includes one or more of real-time head, real-time power and real-time frequency.
As an optional implementation manner, in the first aspect of the present invention, the performance data of the parallel water pump set includes performance point data corresponding to each operating frequency of each pump in the parallel water pump set, where the performance point data includes one or more of an operating flow, a head, a power, a rotation speed, and an efficiency.
A second aspect of the present invention discloses a water pump set control apparatus for controlling a parallel water pump set, including:
the first calculation module is used for calculating a total quadratic control curve for controlling the parallel water pump set when the parallel water pump set is debugged;
the second calculation module is used for calculating the real-time flow needing to be transmitted by the parallel water pump set;
the determining module is used for selecting at least one water pump to be operated from the parallel water pump groups as a target water pump group according to the real-time flow and preset performance data of the parallel water pump groups;
the first calculation module is further used for calculating a target quadratic control curve for controlling the target water pump set according to the total quadratic control curve and the performance data of the parallel water pump set;
and the control module is used for controlling the target water pump set to operate according to the target quadratic control curve.
In a third aspect, the present invention discloses a computer device, comprising a memory for storing a computer program and a processor for operating the computer program to make the computer device execute part or all of the water pump set control method disclosed in the first aspect.
A fourth aspect of the present invention discloses a computer-readable storage medium storing the computer program for use in the computer apparatus of the third aspect.
According to the water pump set control method and the water pump set control device, the total quadratic control curve for controlling the parallel water pump sets is calculated when the parallel water pump sets are debugged. Then, when the parallel water pump set is used, calculating the real-time flow needing to be transmitted by the parallel water pump set; selecting at least one water pump to be operated from the parallel water pump groups as a target water pump group according to the real-time flow and the preset performance data of the parallel water pump groups; further, a target quadratic control curve for controlling the target water pump set is calculated according to the total quadratic control curve and the performance data of the parallel water pump set; and finally, the target water pump set is controlled to operate according to the target quadratic control curve, the pump with the appropriate flow can be quickly switched according to the real-time flow of the system requirement, the work efficiency is favorably improved, and the stability is high.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention.
Fig. 1 is a schematic flow chart of a control method of a water pump group according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a control method of a water pump group according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a water pump unit control device according to a third embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Aiming at the problems in the prior art, the invention provides a water pump set control method and a water pump set control device; and calculating a total quadratic control curve for controlling the parallel water pump set when the parallel water pump set is debugged. Then, when the parallel water pump set is used, calculating the real-time flow needing to be transmitted by the parallel water pump set; selecting at least one water pump to be operated from the parallel water pump groups as a target water pump group according to the real-time flow and the preset performance data of the parallel water pump groups; further, a target quadratic control curve for controlling the target water pump set is calculated according to the total quadratic control curve and the performance data of the parallel water pump set; and finally, the target water pump set is controlled to operate according to the target quadratic control curve, the pump with the appropriate flow can be quickly switched according to the real-time flow of the system requirement, the work efficiency is favorably improved, and the stability is high. Also, the techniques may be implemented in associated software or hardware, as described below by way of example.
Example 1
Referring to fig. 1, fig. 1 is a schematic flow chart of a control method of a water pump group according to an embodiment of the present invention. As shown in fig. 1, the water pump set control method may include the following steps:
s101, calculating a total quadratic control curve for controlling the parallel water pump set when the parallel water pump set is debugged.
In this embodiment, the water pump group control method is used for controlling a parallel water pump group, the parallel water pump group includes a plurality of water pumps, and the performance and the specification of each water pump may be different or the same, which is not limited in this embodiment.
In this embodiment, the plurality of water pumps included in the parallel water pump group are arranged in parallel.
In this embodiment, the water pump is a machine for conveying liquid or pressurizing liquid, and is mainly used for conveying liquid (such as water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal, and the like). The pump can be classified into a positive displacement pump, a vane pump, a centrifugal pump, an axial flow pump, a mixed flow pump, etc. according to different working principles, and this embodiment is not limited thereto.
As an optional implementation manner, before calculating a total quadratic control curve for controlling the parallel water pump groups when the parallel water pump groups are debugged, the method further includes the following steps:
determining a plurality of pump operation combinations according to the parallel water pump groups;
and calculating a combination quadratic control curve corresponding to each pump operation combination and used for controlling the pump operation combination according to the preset performance data of the parallel water pump set.
In the above embodiment, after the total quadratic control curve is calculated, a plurality of pump operation combinations may be determined according to each of the water pumps connected in parallel in the water pump groups connected in parallel, and then different (segmented) combination quadratic control curves, and the maximum operation point and the minimum operation point thereof during operation of the pump operation combinations are obtained.
In the above embodiment, the performance data of the parallel water pump group further includes a combined quadratic control curve corresponding to the pump operation combination and each pump operation combination. When the target quadratic control curve of the target water pump set is calculated, the corresponding pump operation combination can be determined according to the target water pump set, then the combination quadratic control curve corresponding to the pump operation combination is determined, and finally the target quadratic control curve for controlling the target water pump set is calculated according to the combination quadratic control curve, so that the control speed is favorably improved.
And S102, calculating the real-time flow required to be transmitted by the parallel water pump set.
S103, selecting at least one water pump to be operated from the parallel water pump groups as a target water pump group according to the real-time flow and preset performance data of the parallel water pump groups.
In this embodiment, the technical parameters of the water pump performance include flow, suction lift, shaft power, water power, efficiency, and the like, which is not limited in this embodiment.
And S104, calculating a target quadratic control curve for controlling the target water pump set according to the total quadratic control curve and the performance data of the parallel water pump set.
And S105, controlling the target water pump set to operate according to the target quadratic control curve.
In this embodiment, after the target water pump group is determined, the target quadratic control curve is recalculated according to the performance of the target water pump group, the flow-efficiency curve of the target water pump group is calculated according to the target quadratic control curve, and the efficiency critical point and the given efficiency critical bandwidth of the target water pump group are calculated. Wherein the efficiency critical point refers to the intersection point of two flow-efficiency curves after the number of pumps is increased and before the pump number is increased. The calculation results are different due to different water pumps to be operated in the target water pump group, and operation calculation needs to be carried out again to determine a new critical point and a new bandwidth when the parallel water pump group is operated each time, wherein pump change is involved.
In this embodiment, in the flow-efficiency curve of the target water pump group, the efficiency of the target water pump group is calculated by the following formula:
P0＝ΣQ*H*9.81/ΣP；
wherein, P0Represents the efficiency of the target water pump set, Σ Q represents the flow sum of the target water pump set, H represents the head of the target water pump set, and Σ P represents the power sum of the target water pump set.
In this embodiment, after the efficiency-flow curve of the target water pump set is calculated, the efficiency critical point may be calculated according to the efficiency-flow curve, the corresponding efficiency critical bandwidth may be set according to the efficiency critical point, the efficiency-flow curve of the target water pump set is compared with the efficiency critical bandwidth to obtain a comparison result, and finally, the operation state of the target water pump set is controlled according to the comparison result, so that the operation efficiency of the target water pump set may be improved.
In the water pump set control method described in fig. 1, not only can the real-time flow rate required by the system be calculated in real time, but also a suitable target water pump set can be quickly determined from the parallel water pump sets according to the real-time flow rate, and the target water pump set is automatically switched and controlled, so that the stability is high, and the working efficiency is high.
Example 2
Referring to fig. 2, fig. 2 is a schematic flow chart of a control method of a water pump group according to an embodiment of the present invention. As shown in fig. 2, the water pump set control method may include the following steps:
s201, when the parallel water pump groups are debugged, the water pump lift of the parallel water pump groups is obtained when the parallel water pump groups operate according to a preset flow.
In this embodiment, after the pipeline is balanced, the valves of all the end branch pipes are opened, and the frequency of the frequency converter is manually adjusted to enable the parallel water pump sets to be connected according to the preset flow QARunning, recording the pump head H at that timeA(ii) a The preset flow Q at the momentALift HAThe input is input into a controller (or PLC) for controlling the parallel water pump set, and the maximum working point is operated for the parallel water pump set.
In this embodiment, the preset flow QAPreset by staff and can be 200m in size3/h、960m3/h、1740m3And/h, etc., and this embodiment is not limited thereto.
S202, water pump pressure data when the parallel water pump set operates according to the preset zero flow is obtained.
In this embodiment, the preset zero flow is 0.
In this embodiment, the pressure data H of the water pumpBThe pressure at the end or the pressure difference required by the parallel water pump groups can be used, and the embodiment is not limited to this.
And S203, calculating a total quadratic control curve for controlling the parallel water pump set according to preset flow, pump lift, zero flow and water pump pressure data.
In this embodiment, by implementing the steps S201 to S203, the total quadratic control curve for controlling the parallel water pump groups can be calculated when the parallel water pump groups are debugged.
In this embodiment, the preset flow Q is setALift HAZero flow and water pump pressure data HBSubstituting into the following equation:
H＝KQ2+b；
wherein H represents the head or pump pressure data, Q represents the flow, and K and b are coefficients.
The preset flow QALift HAZero flow and water pump pressure data HBSubstituting the coefficients K and b to obtain a total quadratic control curve of the parallel water pump set, and storing the total quadratic control curve.
And S204, calculating the real-time flow required to be transmitted by the parallel water pump set.
In this embodiment, calculating the real-time flow rate that needs to be transmitted by the parallel water pump set includes:
acquiring the temperature difference of supply water and return water of the parallel water pump set;
and calculating the real-time flow to be transmitted by the parallel water pump set according to the preset standard flow, the preset standard temperature difference and the supply and return water temperature difference.
In this embodiment, the calculation of the real-time flow rate to be transmitted by the parallel water pump set may be performed by using the following formula:
q＝Δt/ΔT*Q；
wherein q represents the real-time flow rate to be transmitted by the parallel water pump set, and deltatRepresenting the temperature difference of the supply water and the return water, Q representing the preset standard flow, deltaTIndicating a preset standard temperature difference.
S205, selecting at least one water pump to be operated from the parallel water pump groups as a target water pump group according to the real-time flow and preset performance data of the parallel water pump groups.
In this embodiment, the performance data of the parallel water pump set includes performance point data corresponding to each operating frequency of each pump in the parallel water pump set, where the performance point data includes one or more of an operating flow, a lift, a power, a rotation speed, and an efficiency.
In this embodiment, at least one water pump to be operated may be selected from the parallel water pump groups according to the real-time flow and the preset performance data of the parallel water pump groups and the preset efficient operation principle, and the selected water pump may be used as the target water pump group. The efficient operation principle refers to that when several pumps with different numbers can be selected for operation and combination according to the same flow demand, the pump set scheme with the highest operation efficiency after combination is taken as a target water pump set.
And S206, calculating a target quadratic control curve for controlling the target water pump set according to the total quadratic control curve and the performance data of the parallel water pump set.
And S207, calculating an efficiency flow curve of the target water pump set according to the target quadratic control curve and the performance data of the parallel water pump set.
And S208, calculating real-time operation data corresponding to the target water pump according to the efficiency flow curve.
In this embodiment, the real-time operation data includes one or more of real-time head, real-time power, and real-time frequency.
And S209, controlling the operation of the target water pump set according to the real-time operation data and the efficiency flow curve.
In this embodiment, the operation of the target water pump group can be controlled according to the target quadratic control curve by implementing the steps S207 to S209.
As an optional implementation manner, after controlling the operation of the target water pump group according to the target quadratic control curve, the following steps may be further included:
recalculating the real-time transmission flow of the target water pump set during operation;
judging whether a target water pump set needs to be adjusted or not according to the real-time transmission flow;
if the target water pump set needs to be adjusted, reselecting at least one water pump to be operated from the parallel water pump sets as a new target water pump set according to the real-time transmission flow and the preset performance data of the parallel water pump sets;
calculating a target quadratic control curve for controlling a new target water pump set according to the total quadratic control curve and the performance data of the parallel water pump sets;
and continuously controlling the operation of the new target water pump set according to the target quadratic control curve.
In the above embodiment, the real-time transmission flow rate is a real-time flow rate transmitted when the target water pump operates, and the temperature difference between the supply water and the return water of the target water pump set is obtained first, and then the formula q is Δt/ΔTAnd Q, calculating the real-time transmission flow of the target water pump set.
As an optional implementation manner, after controlling the operation of the target water pump group according to the target quadratic control curve, the following steps may be further included:
determining the theoretical critical point performance of a target water pump set;
detecting the real-time running performance of the target water pump set during running; real-time power and real-time frequency;
comparing the theoretical critical point performance with the real-time operation performance, and judging whether the target water pump set needs to be adjusted or not;
and if the target water pump group needs to be adjusted, selecting at least one water pump to be operated from the parallel water pump groups as a new target water pump group according to the real-time operation performance and the preset parallel water pump group performance data, and continuously executing the step S204 to the step S209.
In the above embodiments, the real-time operational performance includes one or more of real-time head, real-time power, and real-time frequency.
In the water pump set control method described in fig. 2, not only can the real-time flow rate required by the system be calculated in real time, but also a suitable target water pump set can be quickly determined from the parallel water pump sets according to the real-time flow rate, and the target water pump set is automatically switched and controlled, so that the stability is high, and the working efficiency is high.
Example 3
Referring to fig. 3, fig. 3 is a schematic structural diagram of a control device of a water pump set according to an embodiment of the present invention. Wherein, as shown in fig. 3, the water pump set control device comprises:
the first calculation module 301 is configured to calculate a total quadratic control curve for controlling the parallel water pump groups when the parallel water pump groups are debugged.
In this embodiment, the water pump set control device is used for controlling the parallel water pump sets.
And the second calculating module 302 is used for calculating the real-time flow rate required to be transmitted by the parallel water pump sets.
In this embodiment, after the first calculating module 301 calculates the total quadratic control curve, it may also trigger the second calculating module 302 to calculate the real-time flow rate that needs to be transmitted by the parallel water pump set.
And the determining module 303 is configured to select at least one water pump to be operated from the parallel water pump groups as a target water pump group according to the real-time flow and preset parallel water pump group performance data.
The first calculating module 301 is further configured to calculate a target quadratic control curve for controlling the target water pump set according to the total quadratic control curve and the performance data of the parallel water pump set.
And the control module 304 is used for controlling the target water pump set to operate according to the target quadratic control curve.
In this embodiment, after the target water pump group is determined, the target quadratic control curve is recalculated according to the performance of the target water pump group, the flow-efficiency curve of the target water pump group is calculated according to the target quadratic control curve, and the efficiency critical point and the given efficiency critical bandwidth of the target water pump group are calculated. Wherein the efficiency critical point refers to the intersection point of two flow-efficiency curves after the number of pumps is increased and before the pump number is increased. The calculation results are different due to different water pumps to be operated in the target water pump group, and operation calculation needs to be carried out again to determine a new critical point and a new bandwidth when the parallel water pump group is operated each time, wherein pump change is involved.
In this embodiment, in the flow-efficiency curve of the target water pump group, the efficiency of the target water pump group is calculated by the following formula:
P0＝ΣQ*H*9.81/ΣP；
wherein, P0Represents the efficiency of the target water pump set, Σ Q represents the flow sum of the target water pump set, H represents the head of the target water pump set, and Σ P represents the power sum of the target water pump set.
In this embodiment, after the efficiency-flow curve of the target water pump set is calculated, the efficiency critical point may be calculated according to the efficiency-flow curve, the corresponding efficiency critical bandwidth may be set according to the efficiency critical point, the efficiency-flow curve of the target water pump set is compared with the efficiency critical bandwidth to obtain a comparison result, and finally, the operation state of the target water pump set is controlled according to the comparison result, so that the operation efficiency of the target water pump set may be improved.
In the water pump set control device described in fig. 3, not only can the real-time flow required by the system be calculated in real time, but also a proper target water pump set can be quickly determined from the parallel water pump sets according to the real-time flow, and the target water pump set is automatically switched and controlled, so that the stability is high, and the working efficiency is high.
In addition, the invention also provides computer equipment. The computer device comprises a memory and a processor, wherein the memory can be used for storing a computer program, and the processor can execute the computer program to enable the computer device to execute the functions of the method or the modules in the water pump set control device.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The embodiment also provides a computer storage medium for storing a computer program used in the computer device.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part of the technical solution that contributes to the prior art in essence can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A parallel water pump group control method is characterized by comprising the following steps:
calculating a total quadratic control curve for controlling the parallel water pump set when the parallel water pump set is debugged;
calculating the real-time flow required to be transmitted by the parallel water pump set;
determining at least one water pump to be operated from the parallel water pump set as a target water pump set according to the real-time flow and pre-stored performance data of the parallel water pump set;
calculating a target quadratic control curve for controlling the target water pump set according to the total quadratic control curve and the performance data of the parallel water pump set;
controlling the target water pump set to operate according to the target quadratic control curve; wherein,
the calculation formula of the total quadratic control curve and the target quadratic control curve is as follows:
H＝KQ2+b；
h is a dependent variable and represents lift or water pump pressure data; q is an independent variable and represents flow; k and b are coefficients;
both the total quadratic control curve and the target quadratic control curve are used for calculating corresponding head or water pump pressure data according to flow; or both are used to calculate flow from head or pump pressure data.
2. The parallel water pump set control method according to claim 1, further comprising, after controlling the operation of the target water pump set according to the target quadratic control curve:
recalculating the real-time transmission flow of the target water pump set during operation;
judging whether the target water pump set needs to be adjusted or not according to the real-time transmission flow;
if the target water pump set needs to be adjusted, determining at least one water pump to be operated from the parallel water pump sets as a new target water pump set according to the real-time transmission flow and prestored performance data of the parallel water pump sets;
calculating a target quadratic control curve for controlling the new target water pump set according to the total quadratic control curve and the performance data of the parallel water pump set;
and controlling the new target water pump set to operate according to the target quadratic control curve.
3. The parallel water pump set control method according to claim 1, wherein the calculating a total quadratic control curve for controlling the parallel water pump set when the parallel water pump set is debugged comprises:
when the parallel water pump group is debugged, acquiring the water pump lift when the parallel water pump group operates according to a preset flow;
acquiring water pump pressure data when the parallel water pump set operates according to a preset zero flow;
and calculating a total quadratic control curve for controlling the parallel water pump set according to the preset flow, the water pump lift, the zero flow and the water pump pressure data.
4. The parallel water pump set control method according to claim 1, wherein the calculating the real-time flow rate required to be transmitted by the parallel water pump set comprises:
acquiring a temperature difference of supply water and return water;
and calculating the real-time flow required to be transmitted by the parallel water pump set according to a preset standard flow, a preset standard temperature difference and the supply and return water temperature difference.
5. The parallel water pump group control method according to claim 1, wherein controlling the target water pump group to operate according to the target quadratic control curve comprises:
calculating an efficiency flow curve of the target water pump set according to the target quadratic control curve and the performance data of the parallel water pump set;
calculating real-time operation data corresponding to the target water pump according to the efficiency flow curve;
and controlling the target water pump set to operate according to the real-time operation data and the efficiency flow curve.
6. The parallel water pump set control method of claim 5, wherein the real-time operation data comprises one or more of real-time head, real-time power, and real-time frequency.
7. The parallel water pump set control method of claim 4, wherein the parallel water pump set performance data comprises performance point data corresponding to each operating frequency of each pump in the parallel water pump set, wherein the performance point data comprises one or more of operating flow, head, power, speed, and efficiency.
8. A parallel pump group control apparatus, comprising:
the first calculation module is used for calculating a total quadratic control curve for controlling the parallel water pump set when the parallel water pump set is debugged;
the second calculation module is used for calculating the real-time flow needing to be transmitted by the parallel water pump set;
the determining module is used for determining at least one water pump to be operated from the parallel water pump set as a target water pump set according to the real-time flow and pre-stored performance data of the parallel water pump set;
the first calculation module is further used for calculating a target quadratic control curve for controlling the target water pump set according to the total quadratic control curve and the performance data of the parallel water pump set;
the control module is used for controlling the target water pump set to operate according to the target quadratic control curve; wherein,
the calculation formula of the total quadratic control curve and the target quadratic control curve is as follows:
H＝KQ2+b；
h is a dependent variable and represents lift or water pump pressure data; q is an independent variable and represents flow; k and b are coefficients;
both the total quadratic control curve and the target quadratic control curve are used for calculating corresponding head or water pump pressure data according to flow; or both are used to calculate flow from head or pump pressure data.
9. A computer apparatus, characterized by comprising a memory for storing a computer program and a processor for executing the computer program to cause the computer apparatus to execute the parallel water pump set control method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores the computer program used in the computer device of claim 9.
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| JP2010216288A (en) * | 2009-03-13 | 2010-09-30 | Sayama Seisakusho:Kk | Parallel-off control method for parallel pump and parallel-off control system for parallel pump |
| CN102094801A (en) * | 2010-12-27 | 2011-06-15 | 贵州汇通华城楼宇科技有限公司 | Method for optimizing pumping set based on minimum conveying energy consumption |
| CN207750216U (en) * | 2017-12-21 | 2018-08-21 | 北京慧鎏科技有限公司 | Control system of water pump and water pump control cabinet |
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