CN105278352B - Oil-field flooding automatic control system and its method - Google Patents
Oil-field flooding automatic control system and its method Download PDFInfo
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- CN105278352B CN105278352B CN201410229925.3A CN201410229925A CN105278352B CN 105278352 B CN105278352 B CN 105278352B CN 201410229925 A CN201410229925 A CN 201410229925A CN 105278352 B CN105278352 B CN 105278352B
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Abstract
The invention discloses a kind of oil-field flooding automatic control system and its method, including：Oil-field flooding automaton, frequency converter, motor, water injecting pump and pressure sensor.Motor includes a permanent magnet synchronous motors and two asynchronous motors, and permanent magnet synchronous motor and asynchronous machine are connected respectively with corresponding water injecting pump.Oil-field flooding automaton acquires pipeline pressure signal by pressure sensor, and pipeline pressure signal is calculated, and the switching of permanent magnet synchronous motor and asynchronous machine and speed governing to be controlled to operate, realizes the steady of oil-field flooding hydraulic pressure.The present invention can efficiently solve existing oil-field flooding control system and change in the presence of that can not track manufacturing parameter in time, not only cause serious throttling waste, improper the technical issues of leading to production accident can also be adjusted because of operating parameter, water injection rate adjust real-time is good, system reliability, it is safe, reduce noise, energy-saving and emission-reduction, improve work efficiency.
Description
Technical field
The present invention relates to automatic control technologys, are controlled automatically more particularly, to a kind of constant pressure applied to energy-saving oil-field flooding
Devices and methods therefor processed.
Background technology
Oil-field flooding is the important measures that domestic many oil fields keep stable high yield, and method is exactly that will be spread in stratum
Oil is focused in oil well and is extracted up again.Since many oil fields belong to fracture block oil field, each block water filling range is small, water filling
Amount needs often adjustment with the variation of Exploitation Status.In oil extraction in oil field, need constantly from external toward producing horizon water filling, so as to
Oil accumulation improves oil recovery efficiency, and therefore, it is necessary to build water flooding pump station.One water flooding pump station forms an independent water supply network
Network simultaneously keeps water pressure invariableness, to several flushings in varying numbers.In order to keep the constant of water flooding pump station water supply network hydraulic pressure,
One water flooding pump station usually requires 3~4 motor of outfit and corresponding control device.As shown in Figure 1, for 3 motors into
The pressure of row water-injection station is adjusted.System realizes the water supply needs of oil recovery by adjusting more pump motors, in water system
Need to be always maintained at the stabilization of pressure.
Oil-field flooding control system of the prior art is due to lacking hydraulic pressure automatic control function, and generally use is manually
The mode of adjusting.Flood pattern switchs mainly by operating personnel valve controlling flow amount pressure and other parameters everywhere and is given birth to by rule of thumb
Production, can not track the variation of manufacturing parameter in time, not only cause serious throttling waste, can also be adjusted not because of operating parameter sometimes
When and occur that big tank evacuates, pipeline blocks or the accidents such as crude oil tank boil-overs.
Invention content
In view of this, the purpose of the present invention is to provide a kind of oil-field flooding automatic control system and its method, Neng Gouyou
Effect ground solves existing oil-field flooding control system in the presence of that can not track manufacturing parameter variation in time, not only causes serious throttling wave
Take, can also adjust improper the technical issues of leading to production accident because of operating parameter.
In order to achieve the above-mentioned object of the invention, the present invention specifically provides a kind of technology reality of oil-field flooding automatic control system
Existing scheme, a kind of oil-field flooding automatic control system, including：Oil-field flooding automaton, frequency converter, motor, water injecting pump
And pressure sensor.The motor includes a permanent magnet synchronous motors and two asynchronous motors, the permanent magnet synchronous motor and different
Step motor is connected respectively with corresponding water injecting pump.The oil-field flooding automaton is adopted by pressure sensor
Collect pipeline pressure signal, and pipeline pressure signal is calculated, to control the throwing of the permanent magnet synchronous motor and asynchronous machine
It cuts and is operated with speed governing, realize the steady of oil-field flooding hydraulic pressure.
Preferably, homophony speed motor of the permanent magnet synchronous motor as the system, the asynchronous machine is as spare
Motor.When the permanent magnet synchronous motor can not meet pipeline pressure requirement, by automatically engaging or cutting off the asynchronous electric
Machine makes oil-field flooding stable water pressure in pressure constant state, while ensures that the automatic control system is in highest operational efficiency.
Preferably, the automatic control system further includes temperature sensor, for acquiring the temperature for coming from the motor
Signal.The oil-field flooding automaton further comprise control unit, A/D modular converters, communication management module and
DI/DO modules.The pressure sensor and the collected signal of temperature sensor carry out A/D by the A/D modular converters and turn
Described control unit is transmitted to after changing.Described control unit controls the change after calculating, by the communication management module
Frequency device realizes the electric machine speed regulation.Described control unit simultaneously by the DI/DO modules control the permanent magnet synchronous motor and
The switching of asynchronous machine.
Preferably, the motor includes following four operating status：
State 1：When water injecting pump described in separate unit disclosure satisfy that pipeline pressure requirement, the permanent magnet synchronous motor is individually transported
Row；
State 2：When two water injecting pumps disclosure satisfy that pipeline pressure requirement, an asynchronous machine and an institute
Permanent magnet synchronous motor is stated to run simultaneously；
State 3：Under the anhydrous condition of oil field, the automatic control system is shut down, the permanent magnet synchronous motor and asynchronous electricity
Machine is out of service；There are water, the automatic control system Auto Power On operation in oil field；
State 4：It breaks down in the permanent magnet synchronous motor, the state that two asynchronous motors are run simultaneously, one
Asynchronous machine described in platform realizes speed governing operation by the frequency converter, and another asynchronous machine runs on power frequency state.
Preferably, described control unit is in the permanent magnet synchronous motor and asynchronous machine switching or the pipeline pressure signal
When fluctuation is more than setting value, electric machine speed regulation is realized using fuzzy control method；And it is less than in the pipeline pressure signal fluctuation and sets
During definite value, electric machine speed regulation is realized using pid control mode, keeps the static stability of oil-field flooding hydraulic pressure.
Preferably, the oil-field flooding automaton uses the control system based on PLC or DSP.The oil field note
Water automaton further includes man-machine interface, and the man-machine interface is realized runs shape to the oil-field flooding automatic control system
The monitoring of state and the setting of control parameter.
In addition the present invention also specifically provides a kind of oil-field flooding that realization is automatically controlled based on above-mentioned oil-field flooding automatic
The technic relization scheme of control method, the described method comprises the following steps：
S100：The oil-field flooding automaton receives start up command signals, and the oil-field flooding is controlled automatically
The state of system processed is judged, and the valve of associated pipe is operated, if fault-free, starts the frequency converter, if
Failure then trips and alarms；
S101：After the frequency converter starts, into the control to the permanent magnet synchronous motor, by the hydraulic pressure of setting with it is described
The hydraulic pressure of pressure sensor feedback is compared, and is carried out by the output frequency for controlling the frequency converter to the permanent magnet synchronous electric
Machine carries out rotational speed regulation, so as to fulfill the control to the hydraulic pressure；
S102：If the permanent magnet synchronous motor run to rated power still not satisfy the hydraulic pressure of the default when,
The output of permanent magnet synchronous motor described in the oil-field flooding automaton temporarily disconnected, and start spare to wherein one
The asynchronous machine carries out frequency control to realize soft start, and after the asynchronous machine start completion, the system is by described in
Asynchronous machine cuts power frequency operation pattern by converting operation pattern, and enters step S101.
Preferably, the step S102 further comprises：
If the permanent magnet synchronous motor run to rated power still not satisfy the hydraulic pressure of the default when, the system
System carries out timing, if within the time of setting, the system still in Operation at full power, and actual hydraulic pressure and setting differential water pressures away from
When larger, the output of permanent magnet synchronous motor described in the oil-field flooding automaton temporarily disconnected.
Preferably, which further comprises：
When the permanent magnet synchronous motor breaks down, the spare parameter of electric machine is input to the change by the system automatically
In frequency device, and control object is switched to the spare asynchronous machine, when the asynchronous machine is controlled to carry out speed governing operation,
If the system discovery needs to carry out the input of the water injecting pump, and another spare asynchronous machine allows to put into
When, the asynchronous machine that the oil-field flooding automaton control is currently at converting operation pattern switches to power frequency fortune
Row pattern starts another spare asynchronous machine progress speed governing operation after completing switching.
Preferably, the step S101 further comprises：
After the frequency converter starts, the oil-field flooding automaton is by the hydraulic pressure of setting and the pressure sensor
The hydraulic pressure of feedback is compared, and when the pipeline pressure signal fluctuation is less than setting value, the oil-field flooding automatically controls dress
It puts and electric machine speed regulation is realized by pid control mode, keep the static stability of oil-field flooding hydraulic pressure；In the permanent magnet synchronous motor
With during asynchronous machine switching or when the pipeline pressure signal fluctuation is more than setting value, the oil-field flooding automatically controls dress
It puts and electric machine speed regulation is realized by fuzzy control method.
The oil-field flooding automatic control system and its method provided by implementing the invention described above has following technology effect
Fruit：
（1）The present invention successfully reduces manual intervention, and carry using frequency converter and magneto by hydraulic pressure closed-loop control
High efficiency reduces the use of electric energy, realizes the purpose of energy-saving and emission-reduction, significantly reduces labor intensity and the people of field worker
Power cost, water injection rate adjusting real-time is good, and overcoming the prior art and timely and effectively water injection rate cannot be adjusted leads to reality
Border oil-field flooding station all there is technical issues that metered flow and actual flow；
（2）Control, the two is respectively started according to different situations using permanent magnet synchronous motor and asynchronous motor supplied with variable frequency in the present invention
Between effectively cooperation, seamless connection, can not only allow motor that can operate in high-efficiency point in time, it is effectively energy saving, moreover it is possible to
Extend the service life of motor, improve the reliability of system；
（4）The present invention is started using permanent magnet synchronous motor and asynchronous motor supplied with variable frequency point different situations, is run under normal circumstances
Permanent magnet synchronous motor runs asynchronous motor supplied with variable frequency in special circumstances, can greatly reduce operation noise, simultaneously because using work
The adjustable asynchronous motor supplied with variable frequency of working frequency, therefore itself noise is further reduced, and significantly improve working efficiency；
（5）The present invention using permanent magnet synchronous motor and asynchronous motor supplied with variable frequency, and in real time the operating status of supervision equipment and
Fault data protects flood pattern in time, seamless immediately when a motor or corresponding water pump break down wherein
Another motor is switched to, greatly provides the safety and reliability of system.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of prior art oil-field flooding station pressure regulating system；
Fig. 2 is a kind of system structure diagram of specific embodiment of oil-field flooding automaton of the present invention；
Fig. 3 is a kind of electrical-connection topological structure figure of specific embodiment of oil-field flooding automatic control system of the present invention；
Fig. 4 is a kind of program flow diagram of specific embodiment of oil-field flooding autocontrol method of the present invention；
In figure：1- oil-field flooding automatons, 2- frequency converters, 3- motors, 4- water injecting pumps, 5- pressure sensors, 6-
Temperature sensor, 7- output switch cabinets one, 8- output switch cabinets two, 9- output switch cabinets three, 10- control units, 11-A/D turn
Change the mold block, 12- communication management modules, 13-DI/DO modules, 14- power supplys, 15- man-machine interfaces.
Specific embodiment
For the sake of quoting and understanding, by the technical term hereinafter used, write a Chinese character in simplified form or abridge and be described below：
PLC：Programmable Logic Controller, the abbreviation of programmable logic controller (PLC), it can using one kind
The memory of programming for its internally stored program, performs the faces such as logical operation, sequential control, timing, counting and arithmetical operation
Instruction to user, and pass through number or the various types of machineries of analog pattern input/output control or production process；
PID：Proportion Integration Differentiation, the abbreviation of PID control parameter；
CPU：Central Processing Unit, the abbreviation of central processing unit；
A/D：Analog/Digital, the abbreviation of analog/digital；
DI/DO：Digital Input/Digital Output, the abbreviation of numeral input/output.
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, clear, complete description is carried out to the technical solution in the embodiment of the present invention.Obviously, described embodiment is only
Only it is the part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel all other embodiments obtained without creative efforts belong to the model that the present invention protects
It encloses.
As shown in attached drawing 2 to attached drawing 4, the specific implementation of oil-field flooding automatic control system and its method of the present invention is given
Example, the invention will be further described in the following with reference to the drawings and specific embodiments.
As shown in Figure 2, a kind of specific embodiment of oil-field flooding automatic control system, including：Oil-field flooding is controlled automatically
Device 1 processed, frequency converter 2, motor 3, water injecting pump 4 and pressure sensor 5.Motor 3 includes a permanent magnet synchronous motors and two different
Motor is walked, permanent magnet synchronous motor and asynchronous machine are connected respectively with corresponding water injecting pump 4.It is controlled by output switch cabinet 1
The switching of permanent magnet synchronous motor processed controls two asynchronous motors respectively by output switch cabinet 28 and output switch cabinet 39.Oil
Field automatic controller for filling water 1 acquires pipeline pressure signal by pressure sensor 5, and pipeline pressure signal is calculated,
The switching of permanent magnet synchronous motor and asynchronous machine and speed governing to be controlled to operate, the steady of oil-field flooding hydraulic pressure is realized.Present invention tool
Main control motor in water flooding pump station is substituted for permanent magnet synchronous motor by body embodiment.Meanwhile two asynchronous motors use the using and the reserved
Mode.Permanent magnet synchronous electric engine efficiency is higher than asynchronous machine, speed-regulating range width and maintenance cost is low.The specific embodiment of the invention is adopted
With the permanent magnet synchronous motor based on PLC and asynchronous motor control in the automatic control system of one, the section of flood pattern is realized
It can consumption reduction.
As a kind of preferable specific embodiment of the present invention, permanent magnet synchronous motor is as oil-field flooding automatic control system
Homophony speed motor, asynchronous machine are further used as spare motor.When permanent magnet synchronous motor can not meet pipeline pressure requirement, lead to
It crosses and automatically engages or cut off asynchronous motor and make oil-field flooding stable water pressure in pressure constant state, while ensure at automatic control system
In highest operational efficiency.
Automatic control system further includes temperature sensor 6, for acquiring the temperature signal for coming from motor 3.Oil-field flooding
Automaton 1 further comprises control unit 10, A/D modular converters 11, communication management module 12,13 and of DI/DO modules
Power supply 14.Pressure sensor 5 and 6 collected signal of temperature sensor transmit after carrying out A/D conversions by A/D modular converters 11
To control unit 10, control unit 10 controls frequency converter 2 to realize electric machine speed regulation after calculating, by communication management module 12.
Control unit 10 controls the switching of permanent magnet synchronous motor and asynchronous machine by DI/DO modules 13 simultaneously.Power supply 14 is single in order to control
Member 10 provides working power.System described in the specific embodiment of the invention passes through in pressure sensor 5 in pipeline, motor 3
Temperature sensor 6 acquire relevant parameter and pass through A/D modular converters 11 and be fed through the control unit 10 based on PLC, control is single
Member 10 carries out motor speed governing, while control corresponding switch motion by DI/DO modules 13 by operation, realizes that motor 3 exists
Ensure the steady of hydraulic pressure in handoff procedure.
The oil-field flooding automatic control system of specific embodiment of the invention description realizes different 3 power frequencies of motor and is transported with frequency conversion
The switching of row state, due to the outstanding speed adjusting performance of permanent magnet synchronous motor（Wideband working range and the high efficiency of speed governing）,
It in the specific embodiment of the invention, is used permanent magnet synchronous motor as special speed regulating motor, asynchronous motor is as spare motor.
When permanent magnet synchronous motor is unable to reach ductwork pressure requirement, by automatically engaging or cutting off asynchronous motor this hair
It is bright to disclosure satisfy that flood pattern always works in the state of constant pressure, while ensure that system is in highest operational efficiency always.
Motor 3 includes following four operating status：
State 1：When separate unit water injecting pump 4 disclosure satisfy that pipeline pressure requirement, permanent magnet synchronous motor isolated operation；
State 2：When two water injecting pumps 4 disclosure satisfy that pipeline pressure requirement, an asynchronous motors and a permanent-magnet synchronous
Motor is run simultaneously；
State 3：Under the anhydrous condition of oil field, automatic control system is shut down, and permanent magnet synchronous motor and asynchronous machine stop fortune
Row；There are water, the operation of automatic control system Auto Power On in oil field；
State 4：It breaks down in permanent magnet synchronous motor, the state that two asynchronous motors are run simultaneously, one different
It walks motor and speed governing operation is realized by frequency converter 2, another asynchronous motors run on power frequency state.
As shown in Figure 3, automatic control system realizes that closed loop PID is adjusted, the pressure in control unit 10 in access conduit
The pipe network data that sensor 5 is fed back adjusts the throwing of the output frequency and standby stake water pump 4 of frequency converter 2 according to the setting value of user
It cuts, meets the constant-pressure operation of system.Because of the characteristic that water system caliber is big, pipe network pressurising is slower, control unit 10 uses mould
The method that paste control mode is combined with pid control mode.Control unit 10 in permanent magnet synchronous motor and asynchronous machine switching or
When pipeline pressure signal fluctuation is more than setting value, electric machine speed regulation is realized using fuzzy control method.And in pipeline pressure signal wave
When moving less than setting value, electric machine speed regulation is realized using pid control mode, keeps the static stability of oil-field flooding hydraulic pressure.Attached
In Fig. 3, output switch cabinet further comprises contactor KM1, KM3, KM5, KM0, KM2 and KM4.Wherein, output switch cabinet 1
Include contactor KM1 and contactor KM0, power frequency pattern or frequency control pattern are run on for switching permanent magnet synchronous motor；
Output switch cabinet 28 includes contactor KM3 and contactor KM2, for switch an asynchronous motors run on power frequency pattern or
Frequency control pattern；Output switch cabinet 1 includes contactor KM5 and contactor KM4, for switching another asynchronous motors fortune
Row is in power frequency pattern or frequency control pattern.
Oil-field flooding automaton 1 uses the control system based on PLC or DSP.Oil-field flooding automaton 1
Man-machine interface 15 is further included, man-machine interface 15 realizes the monitoring to oil-field flooding automatic control system operating status and control
The setting of parameter.By providing man-machine interface 15, adjustment and observation in real time that user carries out relevant parameter have been further facilitated
Pressure.The specific embodiment of the invention can efficiently control frequency converter 2 by using PLC or DSP powerful logic control ability
Speed governing is carried out, can fully meet the needs of oil field production.A kind of preferred specific embodiment of the present invention, oil-field flooding are controlled automatically
Device 1 processed using based on siemens PLC PLC control platforms, by the electrically operated valve to frequency converter 2 and water injecting pump 4 into
Row jointly controls, and not only realizes the smooth starting of motor, reduces and power grid is impacted, and is realized pair by PID control
The constant control of hydraulic pressure.By intuitive human-computer interaction, greatly reduce manual intervention, greatly reduce since misoperation causes
The system failure, greatly improve the reliability of oil field flood pattern.In addition, control system have this system have it is perfect
Human-computer interaction interface, can monitor the operating status of whole system by man-machine interface 15 and the setting of basic parameter.
And the expanded function of telecommunication is also equipped with, passes through Modbus RTU（A kind of industrial field bus applied to remote terminal
Agreement）Carry out communication extension.Oil-field flooding automaton 1 can also use the platform based on other intelligent controllers to carry out
System controls.
Oil-field flooding automatic control system of the present invention can realize hand/semi/full-automatic handoff functionality, specific to introduce
It is as follows：
Manual function：Under manual operating condition, control system can carry out manual switching water injecting pump 4 and the output frequency of frequency converter 2
The adjusting of rate；
Semi-automatic function：Under semi-automatic operating condition, control system starts or stops pair according to the mode controlled manually
The water injecting pump 4 answered currently carries out speed governing operation by the motor 3 that frequency converter 2 drags；
Full-automatic function：In fully automatic operation, control system will be automatic according to line status and basic setup
Judge time and the sequence of water injecting pump start and stop, and division control is carried out to valve automatically, accomplish that a key automatically controls.
Control system can realize that under different demand environments the automatic switching of each motor 3 is noted so as to fulfill corresponding
The switching of water pump 4.Meanwhile control system is also equipped with exchange-column shift function, control system by according to water injecting pump 4 the switching time,
The factors such as failure automatic decision when switching water injecting pump 4.Control system can also according to the operating status of pipeline, automatically turn on and
Close the electrically operated valve of respective line.By items detection and safeguard measure, one key automatic operating of system can be realized.
As shown in Figure 4, a kind of specific embodiment of oil-field flooding automatic control system, includes the following steps：
S100：Oil-field flooding automaton 1 receives start up command signals, to oil-field flooding automatic control system
State is judged, and the valve of associated pipe is operated, if fault-free, starts frequency converter 2, is jumped if breaking down
Lock is simultaneously alarmed；
S101：After frequency converter 2 starts, into the control to permanent magnet synchronous motor, by the hydraulic pressure of setting and pressure sensor 5
The hydraulic pressure of feedback is compared, and carries out carrying out rotational speed regulation to permanent magnet synchronous motor by the output frequency for controlling frequency converter 2, from
And realize the control to hydraulic pressure；
S102：If permanent magnet synchronous motor runs to rated power the hydraulic pressure for still not satisfying default, oil-field flooding
The output of 1 temporarily disconnected permanent magnet synchronous motor of automaton, and start to become a wherein spare asynchronous machine
Frequency control is to realize soft start, and after asynchronous machine start completion, asynchronous machine is cut power frequency by system by converting operation pattern
Operational mode, and enter step S101.
Frequency converter 2 then enters after starting and permanent magnet synchronous motor is controlled, and by pid control mode, will set water
Pressure is compared, then the output frequency of frequency converter 2 is adjusted by pid control mode with feedback hydraulic pressure, so as to carry out water
The control of pressure.
Above-mentioned steps S102 further comprises：
If permanent magnet synchronous motor runs to rated power the hydraulic pressure for still not satisfying default, system carries out timing,
If within the time of setting, system still in Operation at full power, and actual hydraulic pressure and setting differential water pressures away from it is larger when, oil-field flooding
The output of 1 temporarily disconnected permanent magnet synchronous motor of automaton.
Oil-field flooding autocontrol method further includes step S103, which further comprises：
When permanent magnet synchronous motor breaks down, the spare parameter of electric machine is input in frequency converter 2 by system automatically, and will
Control object is switched to spare asynchronous machine.Control asynchronous machine carry out speed governing operation when, if system discovery need into
The input of row water injecting pump 4.And when another spare asynchronous machine allows input, oil-field flooding automaton 1 controls
The asynchronous machine for being currently at converting operation pattern switches to power frequency operation pattern, complete to start after switching another it is spare different
It walks motor and carries out speed governing operation.
Above-mentioned steps S101 further comprises：
After frequency converter 2 starts, water that oil-field flooding automaton 1 feeds back the hydraulic pressure of setting and pressure sensor 5
Pressure is compared, and when pipeline pressure signal fluctuation is less than setting value, oil-field flooding automaton 1 passes through PID control side
Formula realizes electric machine speed regulation, keeps the static stability of oil-field flooding hydraulic pressure.In permanent magnet synchronous motor and asynchronous machine switching process
In or pipeline pressure signal fluctuation be more than setting value when, oil-field flooding automaton 1 pass through fuzzy control method realize electricity
Machine speed governing.
The specific embodiment of the invention realizes that hydraulic pressure tracks using pid control mode, and water is realized with reference to frequency converter timing technology
That presses is constant.During control, if water pressure fluctuations, in smaller range, pid control mode can cut off to ensure certainly automatically
Autocontrol system is run at steady state.If exception occurs in hydraulic pressure, pid control mode can be put into rapidly, and pass through
Transitive relation between hydraulic pressure and rotating speed can be rapidly achieved close to target hydraulic pressure.It is carried out again by pid control mode later micro-
It adjusts, realizes the quick response of system, reduce system shock.Oil-field flooding automatic control system of the present invention is meeting oil field constant pressure note
Under the requirement of water, user's operation is fully considered, operated by touch screen, greatly reduce manual intervention, improve and be
The reliability of system, and realize a key automation control pattern, greatly save human cost.And it is capable of providing internet
Remote access interface can be realized really unattended.The system of specific embodiment of the invention description utilizes PLC programmable controls
Device processed carries out system control, and hydraulic pressure closed-loop control is carried out by PLC, successfully reduces manual intervention, and using frequency converter 2 and
Permanent magnet synchronous motor improves efficiency, reduces the use of electric energy, successfully realizes the purpose of energy-saving and emission-reduction.And real-time monitoring system
Operating status and fault data, oil-field flooding automatic control system is protected in time.
By implement the specific embodiment of the invention describe oil-field flooding automatic control system and its method, can reach with
Lower technique effect：
（1）The technical solution of specific embodiment of the invention description successfully reduces manual intervention by hydraulic pressure closed-loop control,
And efficiency is improved using frequency converter and magneto, the use of electric energy is reduced, the purpose of energy-saving and emission-reduction is realized, greatly reduces
The labor intensity and human cost of field worker, water injection rate adjust that real-time is good, and overcome the prior art cannot be timely and effective
Water injection rate, which is adjusted, in ground leads to practical oil-field flooding station all there are metered flows and the technology that actual flow does not match that ask
Topic；
（2）The technical solution of specific embodiment of the invention description is using permanent magnet synchronous motor and asynchronous motor supplied with variable frequency according to not
Control is respectively started with situation, effectively cooperation, seamless connection, can not only allow motor to operate in high-efficiency point in time between the two,
It is effectively energy saving, moreover it is possible to extend the service life of motor, improve the reliability of system；
（3）The specific embodiment of the invention description technical solution by soft opening device to asynchronous motor supplied with variable frequency carry out it is soft open or
Soft stop operates, and passes through inverter and carry out speed governing to permanent magnet synchronous motor, electric motor starting and motor can effectively be avoided to cut
The switching shock generated during changing to power grid, and energy utilization rate can be greatlyd improve；
（4）The technical solution of specific embodiment of the invention description is using permanent magnet synchronous motor and asynchronous motor supplied with variable frequency point difference
Situation starts, and runs permanent magnet synchronous motor under normal circumstances, runs asynchronous motor supplied with variable frequency in special circumstances, can greatly reduce
Noise is run, simultaneously because using the adjustable asynchronous motor supplied with variable frequency of working frequency, therefore itself noise is further reduced, and bright
It is aobvious to improve work efficiency；
（5）The technical solution of specific embodiment of the invention description uses permanent magnet synchronous motor and asynchronous motor supplied with variable frequency, and real
When supervision equipment operating status and fault data, flood pattern is protected in time, wherein a motor or corresponding
Water pump break down when, switch seamlessly to another motor immediately, greatly improve the safety and reliability of system.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention.Though
So the present invention is disclosed as above with preferred embodiment, however is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, in the case where not departing from the Spirit Essence of the present invention and technical solution, all using in the methods and techniques of the disclosure above
Appearance makes technical solution of the present invention many possible changes and modifications or is revised as the equivalent embodiment of equivalent variations.Therefore,
Every content without departing from technical solution of the present invention, technical spirit according to the present invention are made to the above embodiment any simple
Modification, equivalent replacement, equivalence changes and modification, still fall within technical solution of the present invention protection in the range of.
Claims (7)
1. a kind of oil-field flooding automatic control system, which is characterized in that including：Oil-field flooding automaton（1）, frequency converter
（2）, motor（3）, water injecting pump（4）And pressure sensor（5）, the motor（3）It is different including a permanent magnet synchronous motors and two
Walk motor, the permanent magnet synchronous motor and asynchronous machine respectively with corresponding water injecting pump（4）It is connected；The oil field note
Water automaton（1）Pass through pressure sensor（5）Pipeline pressure signal is acquired, and pipeline pressure signal is calculated,
The switching of the permanent magnet synchronous motor and asynchronous machine and speed governing to be controlled to operate, the steady of oil-field flooding hydraulic pressure is realized；It is described
Homophony speed motor of the permanent magnet synchronous motor as the system, the asynchronous machine is as spare motor；When the permanent-magnet synchronous
When motor can not meet pipeline pressure requirement, make oil-field flooding stable water pressure by automatically engaging or cutting off the asynchronous motor
In pressure constant state, while ensure that the automatic control system is in highest operational efficiency；
The motor（3）Including following four operating status：
State 1：In water injecting pump described in separate unit（4）When disclosure satisfy that pipeline pressure requirement, the permanent magnet synchronous motor isolated operation；
State 2：In two water injecting pumps（4）When disclosure satisfy that pipeline pressure requirement, an asynchronous machine and an institute
Permanent magnet synchronous motor is stated to run simultaneously；
State 3：Under the anhydrous condition of oil field, the automatic control system is shut down, and the permanent magnet synchronous motor and asynchronous machine stop
Only run；There are water, the automatic control system Auto Power On operation in oil field；
State 4：It breaks down in the permanent magnet synchronous motor, the state that two asynchronous motors are run simultaneously, an institute
It states asynchronous machine and passes through the frequency converter（2）Realize speed governing operation, another asynchronous machine runs on power frequency state；
The oil-field flooding automaton（1）Control unit（10）In the permanent magnet synchronous motor and asynchronous machine switching
Or the pipeline pressure signal fluctuation be more than setting value when, using fuzzy control method realize electric machine speed regulation；And in the pipeline
When pressure signal fluctuation is less than setting value, electric machine speed regulation is realized using pid control mode, the static state for keeping oil-field flooding hydraulic pressure is steady
It is qualitative.
2. a kind of oil-field flooding automatic control system according to claim 1, it is characterised in that：The automatic control system
Further include temperature sensor（6）, come from the motor for acquiring（3）Temperature signal, the oil-field flooding automatically controls
Device（1）Further comprise A/D modular converters（11）, communication management module（12）With DI/DO modules（13）；The pressure passes
Sensor（5）And temperature sensor（6）Collected signal passes through the A/D modular converters（11）It is transmitted to after carrying out A/D conversions
Described control unit（10）, described control unit（10）After calculating, pass through the communication management module（12）Described in control
Frequency converter（2）Realize the electric machine speed regulation；Described control unit（10）Pass through the DI/DO modules simultaneously（13）Described in control forever
The switching of magnetic-synchro motor and asynchronous machine.
3. a kind of oil-field flooding automatic control system according to claim 1 or 2, it is characterised in that：The oil-field flooding
Automaton（1）Using the control system based on PLC or DSP；The oil-field flooding automaton（1）Further include people
Machine interface（15）, the man-machine interface（15）Realize to the monitoring of the oil-field flooding automatic control system operating status and
The setting of control parameter.
A kind of 4. oil-field flooding autocontrol method based on any one of claims 1 to 3 system, which is characterized in that packet
Include following steps：
S100：The oil-field flooding automaton（1）Start up command signals are received, the oil-field flooding is automatically controlled
The state of system is judged, and the valve of associated pipe is operated, if fault-free, starts the frequency converter（2）If
Failure then trips and alarms；
S101：The frequency converter（2）After startup, into the control to the permanent magnet synchronous motor, by the hydraulic pressure of setting with it is described
Pressure sensor（5）The hydraulic pressure of feedback is compared, by controlling the frequency converter（2）Output frequency carry out to the permanent magnetism
Synchronous motor carries out rotational speed regulation, so as to fulfill the control to the hydraulic pressure；
S102：If the permanent magnet synchronous motor run to rated power still not satisfy the hydraulic pressure of the default when, it is described
Oil-field flooding automaton（1）The output of permanent magnet synchronous motor described in temporarily disconnected, and start spare to wherein one
The asynchronous machine carries out frequency control to realize soft start, and after the asynchronous machine start completion, the system is by described in
Asynchronous machine cuts power frequency operation pattern by converting operation pattern, and enters step S101.
5. a kind of oil-field flooding autocontrol method according to claim 4, which is characterized in that the step S102 is into one
Step includes：
If the permanent magnet synchronous motor run to rated power still not satisfy the hydraulic pressure of the default when, the system into
Row timing, if within the time of setting, the system is still in Operation at full power, and actual hydraulic pressure is with setting differential water pressures away from larger
When, the oil-field flooding automaton（1）The output of permanent magnet synchronous motor described in temporarily disconnected.
6. a kind of oil-field flooding autocontrol method according to claim 4 or 5, which is characterized in that the method is also wrapped
Step S103 is included, which further comprises：
When the permanent magnet synchronous motor breaks down, the spare parameter of electric machine is input to the frequency converter by the system automatically
（2）In, and control object is switched to the spare asynchronous machine, when the asynchronous machine is controlled to carry out speed governing operation,
If the system discovery needs to carry out the water injecting pump（4）Input, and another spare asynchronous machine allows
During input, the oil-field flooding automaton（1）Control is currently at the asynchronous machine switching of converting operation pattern
To power frequency operation pattern, start another spare asynchronous machine progress speed governing operation after completing switching.
7. a kind of oil-field flooding autocontrol method according to claim 6, it is characterised in that：The step S101 is into one
Step includes：
The frequency converter（2）After startup, the oil-field flooding automaton（1）By the hydraulic pressure of setting and the pressure sensing
Device（5）The hydraulic pressure of feedback is compared, and when the pipeline pressure signal fluctuation is less than setting value, the oil-field flooding is controlled automatically
Device processed（1）Electric machine speed regulation is realized by pid control mode, keeps the static stability of oil-field flooding hydraulic pressure；In the permanent magnetism
During synchronous motor and asynchronous machine switching or when the pipeline pressure signal fluctuation is more than setting value, the oil-field flooding is certainly
Dynamic control device（1）Electric machine speed regulation is realized by fuzzy control method.
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| CN105781507A (en) * | 2016-03-01 | 2016-07-20 | 常州市天利控制器制造有限公司 | Automatic water injection controller for oil well |
| CN107956458A (en) * | 2016-10-18 | 2018-04-24 | 陕西吉特安全科技有限公司 | A kind of energy saving flood pattern of intelligent control |
| CN109098699A (en) * | 2018-09-20 | 2018-12-28 | 冮振双 | The poly- station overall skid-mounted integrated apparatus of novel oilfield intelligence special high-pressure water filling note |
| CN109441791B (en) * | 2018-11-15 | 2023-09-26 | 中国石油天然气股份有限公司 | Intelligent control system and method for double-pump combined control water injection of water injection station |
| CN110331967A (en) * | 2019-06-11 | 2019-10-15 | 中国石油天然气股份有限公司 | Control and protection system and method for on-load starting of high-pressure water injection pump |
| CN111208852A (en) * | 2020-02-28 | 2020-05-29 | 安徽物迅科技有限公司 | Digital watering valve system |
| CN114517669B (en) * | 2022-03-06 | 2022-09-06 | 大庆乾斯晨石油科技开发有限公司 | Intelligent flow control adjusting equipment based on water injection well |
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