CN106120965A - Pressure-stabilizing water supply system and method - Google Patents
Pressure-stabilizing water supply system and method Download PDFInfo
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- CN106120965A CN106120965A CN201610474000.4A CN201610474000A CN106120965A CN 106120965 A CN106120965 A CN 106120965A CN 201610474000 A CN201610474000 A CN 201610474000A CN 106120965 A CN106120965 A CN 106120965A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000036772 blood pressure Effects 0.000 claims abstract description 20
- 239000003054 catalyst Substances 0.000 claims description 25
- 230000005611 electricity Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 7
- 230000003993 interaction Effects 0.000 claims description 5
- 206010030312 On and off phenomenon Diseases 0.000 abstract 1
- 230000008859 change Effects 0.000 description 8
- 238000013528 artificial neural network Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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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
-
- 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 or valves, in the pipe systems
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of pressure-stabilizing water supply system and method.Described water system includes: multiple pump motors；The device for detecting water pressure being arranged in water supply network；The control device being connected with described device for detecting water pressure, for the hydraulic pressure expected value by relatively presetting and the actual hydraulic pressure value detected, determines that boosting adjusts or blood pressure lowering adjusts；During the boosting needing at least two pump motor to run adjusts, raise the control signal frequency of each pump motor until power frequency switch to the common frequency power network signal of telecommunication when reaching power frequency in batches；During the blood pressure lowering needing at least two pump motor to run adjusts, the control signal that the control signal of each pump motor is switched to from the common frequency power network signal of telecommunication frequency-adjustable in batches, and lower switched control signal frequency.The present invention effectively solves the water supply network moment overpressure problems brought because of pump motor fluctuation of service.
Description
Technical field
The present embodiments relate to industry control technology, particularly relate to a kind of pressure-stabilizing water supply system and method.
Background technology
Water supply network is that people live indispensable municipal works.Hydraulic pressure in water supply network is astable the most constant,
Water use peak, with during water low ebb, water supply-cut off the water-supply water, the hydraulic pressure in water supply network all can change.Adjust according to reality
Control needs, and the water yield in water supply network can be adjusted by water system.During regulation, owing to hydraulic pressure regulative mode is inadequate
Precisely so that during regulation, water supply network is affected the possibility having pipe breakage by moment overvoltage.
Accordingly, it would be desirable to the hydraulic pressure regulative mode of existing water system is improved.
Summary of the invention
The present invention provides a kind of pressure-stabilizing water supply system and method, can cause water supply network solving existing hydraulic pressure regulative mode
The problem of moment overvoltage.
First aspect, embodiments provides a kind of pressure-stabilizing water supply system, including: multiple pump motors；It is arranged on
Device for detecting water pressure in water supply network；The control device being connected with described device for detecting water pressure, for preset by comparison
Hydraulic pressure expected value and the actual hydraulic pressure value detected, determine that boosting adjusts or blood pressure lowering adjusts；At needs at least two pump motor
Run boosting adjust during, raise the control signal frequency of each pump motor in batches until power frequency and when reaching power frequency switch
To the common frequency power network signal of telecommunication；Need at least two pump motor to run blood pressure lowering adjust during, in batches by each pump motor
Control signal switch to the control signal of frequency-adjustable from the common frequency power network signal of telecommunication, and lower switched control signal frequency
Rate.
Second aspect, the embodiment of the present invention additionally provides a kind of pressure-stabilizing water supply method, for comprising multiple pump motor
In voltage-stabilizing system, including: the actual hydraulic pressure value in detection water supply network；By the hydraulic pressure expected value relatively preset with detected
Actual hydraulic pressure value, determines that boosting adjusts or blood pressure lowering adjusts；During the boosting needing at least two pump motor to run adjusts, point
Pull on and adjust the control signal frequency of each pump motor until power frequency switch to the common frequency power network signal of telecommunication when reaching power frequency；Needing
During wanting the blood pressure lowering that at least two pump motor runs to adjust, in batches by the control signal of each pump motor from common frequency power network electricity
Signal switches to the control signal of frequency-adjustable, and lowers switched control signal frequency.
The present invention regulates and controls the hydraulic pressure of water supply network by the way of progressively adjusting control signal, it is possible to effectively prevent water pump
The problem of the moment overvoltage that water supply network is caused by group of motors when rotating speed suddenlys change.Meanwhile, when frequency is raised to power frequency, will control
Signal switches to the common frequency power network signal of telecommunication, it is possible to allows each pump motor be in stable rotating speed and runs, effectively solves because of water pump electricity
The water supply network moment overpressure problems that machine fluctuation of service is brought.
Accompanying drawing explanation
Fig. 1 is the structural representation of the pressure-stabilizing water supply system in the embodiment of the present invention one；
Fig. 2 is the structural representation of the pressure-stabilizing water supply system in the embodiment of the present invention two；
Fig. 3 is the structural representation of the pressure-stabilizing water supply system in the embodiment of the present invention three；
Fig. 4 is the structural representation of the pressure-stabilizing water supply system in the embodiment of the present invention four；
Fig. 5 is the structural representation of the pressure-stabilizing water supply system in the embodiment of the present invention five；
Fig. 6 is the flow chart of the pressure-stabilizing water supply method in the embodiment of the present invention six.
Detailed description of the invention
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention is illustrate only rather than entire infrastructure in description, accompanying drawing.
Embodiment one
The structural representation of the pressure-stabilizing water supply system that Fig. 1 provides for the embodiment of the present invention one, the present embodiment is applicable to right
The adjustment situation of variation in water pressure in water supply network, this pressure-stabilizing water supply system includes: multiple pump motors 1, device for detecting water pressure 2,
With control device 3.
Described pump motor 1 adjusts the water yield in water supply network by adjusting rotating speed, and rotating speed is the slowest, in water supply network
The water yield of output is the fewest.Described pump motor 1 adjusts rotating speed according to the frequency of the control signal received.Described pump motor
1 is exemplified as asynchronous machine.
Described device for detecting water pressure 2 is arranged in water supply network, is used for detecting actual hydraulic pressure value in water supply network.
Described control device 3 is connected with described device for detecting water pressure 2 and accesses common frequency power network, by the water relatively preset
Pressure expected value and the actual hydraulic pressure value detected, determine that boosting adjusts or blood pressure lowering adjusts；Transport at needs at least two pump motor 1
Row boosting adjust during, raise the control signal frequency of each pump motor 1 in batches until power frequency and when reaching power frequency switch
To the common frequency power network signal of telecommunication；Need at least two pump motor 1 to run blood pressure lowering adjust during, in batches by each pump motor
The control signal of 1 switches to the control signal of frequency-adjustable from the common frequency power network signal of telecommunication, and lowers switched control signal frequency
Rate.
Specifically, described control device 3 presets hydraulic pressure expected value, and the reality that real-time reception device for detecting water pressure 2 is transmitted
Border hydraulic pressure value, described control device 3, when hydraulic pressure expected value being detected higher than actual hydraulic pressure value, determines that carrying out boosting adjusts.?
During boosting adjusts, described control device 3 first sends the control signal of frequency-adjustable to part pump motor 1, and steps up
The frequency of corresponding control signal.By real-time comparison actual hydraulic pressure value and hydraulic pressure expected value, described control device 3 determines whether
Continue to improve the frequency of control signal, if without continuing to improve, then according to the frequency currently adjusted to corresponding pump motor 1
Go out control signal；If desired improve, then continuation raising frequency is until the frequency adjusted rises to power frequency (such as 50Hz), and is rising to
During power frequency, the control signal of corresponding pump motor 1 is switched to common frequency power network.According still further to above-mentioned adjustment mode, progressively raise surplus
The control signal frequency of remaining at least part of pump motor 1.Wherein, the pump motor 1 that the described every batch of control device 3 adjusts
Quantity can be one or the fixed qty preset.
When hydraulic pressure expected value being detected less than actual hydraulic pressure value, described control device 3 determines that blood pressure lowering adjusts.And in blood pressure lowering
During adjustment, described control device 3, by reverse execution boosting adjustment process, i.e. gradually reduces each pump motor 1 according to inverted order
Control signal frequency.Specifically, when the frequency of the control signal of the pump motor 1 currently adjusted is down to minima, will
The control signal having transferred to common frequency power network progressively switches to the control signal of frequency-adjustable, and reduces the frequency of the control signal after switching
Rate, until the difference of actual hydraulic pressure value and hydraulic pressure expected value is in default range of error or until the control of all pump motors 1
Signal frequency is down to minima.
Wherein, during raising/lowering, described control device 3 can be according to default unit pressure difference and cell frequency
Between corresponding relation, determine the frequency corresponding to pressure differential of in real time calculating, and according to determined by frequency adjust phase
The control signal answered.
Wherein, when the control signal frequency of all pump motors 1 is down to minima, described control device 3 can be intermittent
The control signal will send predeterminated frequency (between minima and power frequency) to part pump motor 1.Or, described control
Device 3 not sends control signal to pump motor 1, until detecting that hydraulic pressure expected value is higher than actual hydraulic pressure value.
Described control device 3 can be performed above-mentioned control process by software completely.
The present embodiment regulates and controls the hydraulic pressure of water supply network by the way of progressively adjusting control signal, it is possible to effectively prevent water
The problem of the moment overvoltage that water supply network is caused by pump motor 1 group when rotating speed suddenlys change.Meanwhile, when frequency is raised to power frequency, will
Control signal switches to the common frequency power network signal of telecommunication, it is possible to allows each pump motor 1 be in stable rotating speed and runs, effectively solves because of water
The water supply network moment overpressure problems that pump motor 1 fluctuation of service is brought.
Embodiment two
On the basis of the various embodiments described above, it is contemplated that control response efficiency and the actual rings of industry control operation of device 3
Border, described control device 3 includes: pressure control unit 32 and catalyst group 31.As shown in Figure 2.
Wherein, described pressure control unit 32 can be single-chip microcomputer.Described pressure control unit 32 is connected to hydraulic pressure detection
Between device 2 and catalyst group 31.
Described catalyst group 31 may include that many group controlled switch groups and connects the choosing controlling end of each group of controlled switch group
Select device.Often group controlled switch group individually controls the speed governing operation of a pump motor 1, constant-speed operation and stopping.Wherein, described choosing
Select the device switching command according to pressure control unit 32, to the controlled switch group indicated by described switching command in each running status
Between switch over.
Often group controlled switch group also includes: spacing wave receiving terminal, fm control signal receiving terminal, constant frequency control signal receive
End and control signal receiving terminal.Wherein, described spacing wave receiving terminal does not receive control signal, when controlled switch group refers to according to switching
When order switches to this spacing wave receiving terminal, pump motor 1 is out of service.Described fm control signal receiving terminal connects described pressure
Control unit 32, when controlled switch group switches to this fm control signal receiving terminal according to switching command, pump motor 1 basis
The frequency shift rotating speed of the control signal received.Described constant frequency control signal receiving terminal connects common frequency power network, works as controlled switch
When group switches to this constant frequency control signal receiving terminal according to switching command, pump motor 1 constant-speed operation.
Here, the fm control signal receiving terminal of all controlled switch groups can individually connect described pressure control unit 32
Each control signal outfan, it is also possible to merge the control signal outfan connecting pressure control unit 32.
Specifically, described pressure control unit 32, for the difference according to described hydraulic pressure expected value Yu actual hydraulic pressure value, adjusts
The frequency of the control signal of part pump motor 1；When the frequency of the control signal adjusted rises to power frequency, indicate described contact
Device group 31 is controlled the operation of corresponding pump motor 1 by common frequency power network, and starts and raise at least part of pump motor 1 in residue
The frequency of control signal；When the frequency of the control signal adjusted is down to predetermined minimum, described catalyst group 31 is indicated to incite somebody to action
At least partly pump motor 1 is switched to the control signal of frequency-adjustable by the signal of telecommunication of common frequency power network, and starts and lower switching
After the control signal frequency of pump motor 1.
Described catalyst group 31, for the instruction according to described pressure control unit 32, controls corresponding pump motor 1 in nothing
Switch between control signal that control signal, pressure control unit 32 are provided or the control signal that common frequency power network is provided
Such as, described pressure control unit 32, according to the difference of described hydraulic pressure expected value Yu actual hydraulic pressure value, adjusts water pump electricity
The frequency of the control signal of machine A1.
During raising, when the frequency of the control signal of A1 rises to power frequency, described pressure control unit 32 is to catalyst
Group 31 transmission comprises pump motor A1 information and the pairing of constant frequency control signal receiving terminal, pump motor A2 information and frequency modulation control letter
The switching command of number receiving terminal pairing, described catalyst group 31 is according to described switching command, and the signal of telecommunication making common frequency power network is water
The control signal of pump motor A1, and make the control signal of pressure control unit 32 export to pump motor A2 so that water pump electricity
Machine A2 is in speed governing operation state.Described pressure control unit 32 continues the difference between detection actual hydraulic pressure value and hydraulic pressure expected value
Away from, and according to the adjustment order of each pump motor 1, raise the rotating speed of each pump motor 1 one by one, until actual hydraulic pressure value and hydraulic pressure
Gap between expected value reaches in default range of error.The purpose of each pump motor 1 rotating speed is progressively raised in so realization.
During lowering, when the frequency of the control signal of An is down to predetermined minimum, described pressure control unit 32 to
Catalyst group 31 sends and comprises pump motor An information and the pairing of spacing wave receiving terminal, pump motor A (n-1) information and frequency modulation control
The switching command of signal receiving end processed pairing, described catalyst group 31, according to described switching command, will be connected with pump motor An
Controlled switch group switched to spacing wave receiving terminal by fm control signal receiving terminal, and by connected for pump motor A (n-1)
Controlled switch group is switched to fm control signal receiving terminal by constant frequency control signal receiving terminal so that pump motor A (n-1) is in
Speed governing operation state.Described pressure control unit 32 continues the gap between detection actual hydraulic pressure value and hydraulic pressure expected value, and presses
According to the adjustment order of each pump motor 1 respectively controlled by common frequency power network, lower the rotating speed of each pump motor 1 one by one, until real
Gap between border hydraulic pressure value and hydraulic pressure expected value reaches in default range of error.Each pump motor is progressively lowered in so realization
The purpose of 1 rotating speed.
Here, described pressure control unit 32 can raise/lower each control according to the mode described in the various embodiments described above
The frequency of signal.
The present embodiment uses catalyst group 31 to be managed collectively the control signal of each pump motor 1, and utilizes single-chip microcomputer
Output switching instruction and control signal, simplify the hardware configuration controlling device 3 from hardware, and improve control device 3 work
The real-time of control.
Embodiment three
On the basis of foregoing embodiments, as it is shown on figure 3, described pressure control unit 32 includes: PID controller 321
With converter 322.Frequency in pressure control unit 32 described in the further Hardware of the present embodiment adjusts mode, to improve frequency
Regulated efficiency and adaptation industry control environment.Described pressure control unit 32 also includes for according to described hydraulic pressure expected value and actual water
The difference of pressure value calculates the processor of pid parameter.
Specifically, described processor adjusts pid parameter according to the difference of described hydraulic pressure expected value Yu actual hydraulic pressure value, and will
Pid parameter after adjustment passes to PID controller 321.Described PID controller 321 adjusts frequency conversion according to obtained pid parameter
The control signal frequency of device 322 output.
Here, described processor is according to self-adjusting fuzzy neural network, build described difference and pid parameter adjustment side in advance
The model of case, when determining described difference, calculates corresponding pid parameter according to described model, and described PID controller 321 is pressed
According to the pwm signal of described pid parameter change output to converter 322, described converter 322 adjusts according to pwm signal and controls letter
Number frequency, and control signal is exported to catalyst group 31, the most described processor also exports corresponding control to catalyst group 31
Pump motor 1 information of signal is (such as motor numbering or motor identification information etc. and/or switching command etc..
The present embodiment has considered water supply network transfer curved pipe, the thickness pipeline shadow when variation in water pressure to pipeline
Ringing, utilize self-adjusting fuzzy neural network to adjust pid parameter, and change based on pid parameter is by PID controller 321 He
Converter 322 changes the frequency of control signal, it is possible to more stable supplies water in water supply network.Simultaneously as use hardware electricity
Road realizes the frequency change of control signal, further increases the response efficiency of pressure-stabilizing water supply system.
Embodiment four
On the basis of the various embodiments described above, in order to ensure control signal pressure control unit 32 and common frequency power network it
Between switch moment, do not mate the problem that the instantaneous frequency caused is too high due to phase place, described control device 3 is additionally operable to utilize phase-locked
Loop technique, adjusts the phase place of the control signal before switching according to the common frequency power network signal of telecommunication, and in the phase place of lock control signal
Time, corresponding control signal is switched to common frequency power network.
Specifically, during raising, described control device 3 is up to the control signal of power frequency and exports to phase-locked loop circuit
In, and the phase place of the control signal before switching is adjusted according to the common frequency power network signal of telecommunication, and when determining that phase contrast is stablized, by phase
The control signal answered switches to the signal of telecommunication of common frequency power network.So guarantee control signal when switching with the signal of telecommunication of common frequency power network
Keep stable phase contrast, it is achieved control signal fine setting on work frequency.
It should be noted that aforesaid way can also be used during lowering to realize the stable switching of control signal.Or,
Use the mode of directly switching.
A kind of alternative is that as shown in Figure 4, described control device 3 also includes: comprise two inputs and an output
The phase-locked control unit of end, wherein, two inputs connect the outfan of pressure control unit 32 in described control device 3 respectively
And common frequency power network, the outfan of described phase lock control unit 33 connects described pressure control unit 32.
Described phase lock control unit 33 is defeated to described pressure control unit 32 institute for the signal of telecommunication based on common frequency power network
The control signal gone out enters horizontal phasing control.
Control signal after described pressure control unit 32 is additionally operable to phase modulation exports the contact to described control device 3
Device group 31, and when described control signal frequency reaches power frequency, export corresponding switching command.
Described catalyst group 31 controls corresponding pump motor 1 according to described switching command and receives the control that common frequency power network is provided
Signal processed.
Wherein, described phase lock control unit 33 comprises the signal adapter being connected respectively with two inputs, to gather
The signal of telecommunication in control signal and common frequency power network.Described phase lock control unit 33 also includes phase-locked loop circuit, its real-time base
After the control signal that described pressure control unit 32 is exported is entered horizontal phasing control, and general's adjustment by the signal of telecommunication of common frequency power network
Control signal feed back to pressure control unit 32.Control signal after phase modulation is exported to contact by described pressure control unit 32
Device group 31, pump motor 1 information of the control signal simultaneously correspondence exported passes to catalyst group 31.Described catalyst group
The rotating speed of 31 pump motors 1 adjusting corresponding pump motor 1 information according to the control signal that received.When described control signal
When frequency reaches power frequency, the control signal after phase modulation is exported to catalyst group 31 by described pressure control unit 32, and to contact
Device group 31 output comprises pump motor 1 information and the switching command of Isobarically Control signal receiving end.
The present embodiment is processed by the phase modulation of phase lock control unit 33, it is possible to effectively reduces control signal and is switching to work
Frequently the instantaneous high frequency that the moment of electrical network is caused, so efficiently solve instantaneous high frequency too fast to pump motor 1 transient speed and
The problem that hydraulic pressure instantaneous to water supply network is excessive.
Embodiment five
On the basis of the various embodiments described above, as it is shown in figure 5, described pressure-stabilizing water supply system also includes: alarm device and/
Or human-computer interaction device.
Described alarm device is connected with described control device 3, for detecting the operation exception situation of described control device 3,
And when operation exception being detected, send a warning.
Such as, described alarm device, by being monitored the voltage of main circuit, electric current etc., determines control signal frequency
The fault that overshoot, main circuit overvoltage or overcurrent cause, and use acousto-optic in time and/or warning information is sent to terminal
The modes such as prompting send a warning.
Human-computer interaction device is connected with described control device 3, for inputting hydraulic pressure expected value to described control device 3.
Such as, when maintainer needs to overhaul water supply network, then by described human-computer interaction device by the hydraulic pressure phase
Prestige value is set to 0.And for example, when water supply network normally works or resumes water supply, beforehand through described human-computer interaction device by water
Pressure expected value is set to b.
Embodiment six
As shown in Figure 6, the embodiment of the present invention provides a kind of pressure-stabilizing water supply method.Described method of supplying water can be used for any of the above-described
In water system.Described method of supplying water can be also used for provide other water systems of pressure-stabilizing water supply according to described method.
Actual hydraulic pressure value in step S110, detection water supply network.
Step S120, by the hydraulic pressure expected value relatively preset and the actual hydraulic pressure value detected, determining boosting adjust or
Blood pressure lowering adjusts.
When being defined as boosting and adjusting, first send the control signal of frequency-adjustable to part pump motor, and step up
The frequency of corresponding control signal.By real-time comparison actual hydraulic pressure value and hydraulic pressure expected value, described control device determines whether
Continue to improve the frequency of control signal, if without continuing to improve, then sending out to corresponding pump motor according to the frequency currently adjusted
Go out control signal；If desired improve, then perform step S130.
When being defined as blood pressure lowering and adjusting, the frequency of the control signal of the pump motor currently adjusted is down to minima,
When by comparing actual hydraulic pressure value and hydraulic pressure expected value in real time, when determining that being down to minima remains a need for continuing blood pressure lowering, performing step
S140。
Step 130, need at least two pump motor to run boosting adjust during, raise each pump motor in batches
Control signal frequency is until power frequency switch to the common frequency power network signal of telecommunication when reaching power frequency.
Wherein, the quantity of the pump motor often pulling on tune can be one or multiple.
A kind of alternative is, according to the difference of described hydraulic pressure expected value Yu actual hydraulic pressure value, raises wherein part water pump electricity
The control signal frequency of machine, when the frequency of the control signal adjusted rises to power frequency, is controlled corresponding water pump electricity by common frequency power network
The operation of machine, and raise the control signal frequency of at least part of pump motor in residue.
Wherein, a kind of alternative raising frequency is to utilize PHASE-LOCKED LOOP PLL TECHNIQUE, adjusts according to the common frequency power network signal of telecommunication
The phase place of the control signal before switching, and when the phase place of lock control signal, corresponding control signal is switched to common frequency power network.
Specifically, control signal is entered horizontal phasing control by the signal of telecommunication based on common frequency power network；And by the control after phase modulation
The pump motor that signal output is the most corresponding, and when described control signal frequency reaches power frequency, to corresponding pump motor outputting cutting
Change instruction.
It should be noted that the switching mode of the mode of rise and control signal can be according to the embodiment of above-mentioned each water system
In control the rise mode of device and the switching mode of control signal and set.
Step S140, need at least two pump motor to run blood pressure lowering adjust during, in batches by each pump motor
Control signal switch to the control signal of frequency-adjustable from the common frequency power network signal of telecommunication, and lower switched control signal frequency
Rate.
Wherein, the quantity of the pump motor often pulling on tune can be one or multiple.
A kind of alternative is, according to the difference of described hydraulic pressure expected value Yu actual hydraulic pressure value, lowers wherein part water pump electricity
The control signal frequency of machine, when the control signal frequency adjusted is down to predetermined minimum, indicates described catalyst group near
Small part pump motor is switched to the control signal of frequency-adjustable by the signal of telecommunication of common frequency power network, and after starting and lowering switching
The control signal frequency of pump motor.
It should be noted that the switching mode of the mode of downward and control signal can be according to the embodiment of above-mentioned each water system
In control the downward mode of device and the switching mode of control signal and set.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious change,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although by above example, the present invention is carried out
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other Equivalent embodiments more can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (11)
1. a pressure-stabilizing water supply system, it is characterised in that including:
Multiple pump motors；
The device for detecting water pressure being arranged in water supply network；
The control device being connected with described device for detecting water pressure, for the hydraulic pressure expected value by relatively presetting and the reality detected
Border hydraulic pressure value, determines that boosting adjusts or blood pressure lowering adjusts；During the boosting needing at least two pump motor to run adjusts, in batches
Raise the control signal frequency of each pump motor until power frequency switch to the common frequency power network signal of telecommunication when reaching power frequency；At needs
At least two pump motor run blood pressure lowering adjust during, in batches by the control signal of each pump motor from common frequency power network telecommunications
Number switch to the control signal of frequency-adjustable, and lower switched control signal frequency.
Pressure-stabilizing water supply system the most according to claim 1, it is characterised in that described control device includes: Stress control list
Unit, catalyst group；
Described pressure control unit is connected between device for detecting water pressure and catalyst group, at needs at least two water pump electricity
During the boosting that machine runs adjusts, according to the difference of described hydraulic pressure expected value Yu actual hydraulic pressure value, raise wherein part pump motor
Control signal frequency, when the frequency of the control signal adjusted rises to power frequency, indicate described catalyst group by common frequency power network
Control the operation of corresponding pump motor, and raise the control signal frequency of at least part of pump motor in residue；And, at needs
During the blood pressure lowering that at least two pump motor runs adjusts, according to the difference of described hydraulic pressure expected value Yu actual hydraulic pressure value, lower it
The control signal frequency of middle part pump motor, when the control signal frequency adjusted is down to predetermined minimum, instruction is described
At least part of pump motor is switched to the control signal of frequency-adjustable by catalyst group by the signal of telecommunication of common frequency power network, and starts also
Lower the control signal frequency of the pump motor after switching；
Described catalyst group is connected between pressure control unit with all pump motors and is connected common frequency power network, for according to
The instruction of described pressure control unit, controls corresponding pump motor in the control provided without control signal, pressure control unit
Switch between the control signal that signal or common frequency power network are provided.
Pressure-stabilizing water supply system the most according to claim 2, it is characterised in that described pressure control unit includes: PID controls
Device, converter；
Described PID controller, by the pid parameter adjusted according to the difference of described hydraulic pressure expected value Yu actual hydraulic pressure value, adjusts
The control signal frequency of converter output.
4. according to described pressure-stabilizing water supply system arbitrary in claim 1-3, it is characterised in that raising at least one water pump electricity
The control signal frequency of machine is until power frequency during switching to common frequency power network when reaching power frequency, and described control device is additionally operable to profit
By PHASE-LOCKED LOOP PLL TECHNIQUE, adjust the phase place of the control signal before switching according to the common frequency power network signal of telecommunication, and in lock control signal
Phase place time, corresponding control signal is switched to common frequency power network.
Pressure-stabilizing water supply system the most according to claim 4, it is characterised in that described control device also includes: comprise two
Input and the phase-locked control unit of an outfan, wherein, two inputs connect pressure control in described control device respectively
The outfan of unit processed and common frequency power network, the outfan of described phase lock control unit connects described pressure control unit；
The control that described pressure control unit is exported by described phase lock control unit for the signal of telecommunication based on common frequency power network
Signal enters horizontal phasing control；
Control signal after described pressure control unit is additionally operable to phase modulation exports the catalyst group to described control device, and
When described control signal frequency reaches power frequency, export corresponding switching command；
Described catalyst group controls corresponding pump motor according to described switching command and receives the control signal that common frequency power network is provided.
Pressure-stabilizing water supply system the most according to claim 1, it is characterised in that also include:
The alarm device being connected with described control device, for detecting the operation exception situation of described control device, and in detection
During to operation exception, send a warning；
And/or, the human-computer interaction device being connected with described control device, for inputting hydraulic pressure expected value to described control device.
7. a pressure-stabilizing water supply method, in the voltage-stabilizing system comprising multiple pump motor, it is characterised in that including:
Actual hydraulic pressure value in detection water supply network；
By the hydraulic pressure expected value relatively preset and the actual hydraulic pressure value detected, determine that boosting adjusts or blood pressure lowering adjusts；
During the boosting needing at least two pump motor to run adjusts, raise the control signal frequency of each pump motor in batches
Until power frequency switch to the common frequency power network signal of telecommunication when reaching power frequency；
During the blood pressure lowering needing at least two pump motor to run adjusts, the control signal by each pump motor in batches is from work
Frequently the electrical network signal of telecommunication switches to the control signal of frequency-adjustable, and lowers switched control signal frequency.
Pressure-stabilizing water supply method the most according to claim 7, it is characterised in that run needing at least two pump motor
During boosting adjusts, including:
According to the difference of described hydraulic pressure expected value Yu actual hydraulic pressure value, raise the control signal frequency of wherein part pump motor, when
When the frequency of the control signal adjusted rises to power frequency, common frequency power network control the operation of corresponding pump motor, and raise residue
In the control signal frequency of at least part of pump motor.
Pressure-stabilizing water supply method the most according to claim 7, it is characterised in that run needing at least two pump motor
During blood pressure lowering adjusts, including:
According to the difference of described hydraulic pressure expected value Yu actual hydraulic pressure value, lower the control signal frequency of wherein part pump motor, when
When the control signal frequency adjusted is down to predetermined minimum, indicate described catalyst group by least part of pump motor by power frequency
The signal of telecommunication of electrical network switches to the control signal of frequency-adjustable, and starts and lower the control signal of the pump motor after switching
Frequency.
Pressure-stabilizing water supply method the most according to claim 8, it is characterised in that described according to hydraulic pressure expected value and actual water
The difference of pressure value, raises the control signal frequency of wherein part pump motor, including: utilize PHASE-LOCKED LOOP PLL TECHNIQUE, according to common frequency power network
The signal of telecommunication adjusts the phase place of the control signal before switching, and when the phase place of lock control signal, corresponding control signal is cut
Shift to common frequency power network.
11. pressure-stabilizing water supply methods according to claim 10, it is characterised in that described utilize PHASE-LOCKED LOOP PLL TECHNIQUE, according to work
The phase place of the control signal before the electrical network signal of telecommunication adjusts switching frequently, and when the phase place of lock control signal, will control accordingly
Signal switches to common frequency power network, including:
Control signal is entered horizontal phasing control by the signal of telecommunication based on common frequency power network；
Control signal after phase modulation is exported to corresponding pump motor, and when described control signal frequency reaches power frequency, to
Corresponding pump motor output switching instruction.
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| CN107143004A (en) * | 2017-06-15 | 2017-09-08 | 温州大学 | A kind of equal flow circuit of water system filtered based on PWM |
| CN109374863A (en) * | 2018-11-28 | 2019-02-22 | 浙江大学 | A kind of circulating water supply device for centrifugal model test under high-g level |
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