CN105278352A - Oil field water injection automatic control system and method thereof - Google Patents
Oil field water injection automatic control system and method thereof Download PDFInfo
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- CN105278352A CN105278352A CN201410229925.3A CN201410229925A CN105278352A CN 105278352 A CN105278352 A CN 105278352A CN 201410229925 A CN201410229925 A CN 201410229925A CN 105278352 A CN105278352 A CN 105278352A
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Abstract
The invention discloses an oil field water injection automatic control system and a method thereof. The oil field water injection automatic control system comprises an oil field water injection automatic control device, a frequency converter, motors, water injection pumps and a pressure sensor, and is characterized in that the motors comprise a permanent magnet synchronous motor and two asynchronous motors, and the permanent magnet synchronous motor and the two asynchronous motors are connected with the corresponding water injection pumps respectively; and the oil field water injection automatic control device acquires pipeline pressure signals through the pressure sensor, and carries out calculation on the pipeline pressure signals, thereby controlling switching and speed regulating operations of the permanent magnet synchronous motor and the asynchronous motors, and realizing smooth and steady water pressure of oil field water injection. The system and the method disclosed by the invention can effectively solve a technical problem that an existing oil field water injection control system cannot track variations of production parameters timely, which not only causes serious throttling waste, but also results in production accidents because of inappropriate regulation of operating parameters. The oil field water injection automatic control system is good in real-time performance of water injection amount regulation and high in system reliability and safety, reduces noises, saves energy, reduces emission, and improves the work efficiency.
Description
Technical field
The present invention relates to automatic control technology, especially relate to a kind of the constant voltage automaton and the method thereof that are applied to energy-saving oil-field flooding.
Background technology
Oil-field flooding is the important measures that domestic a lot of oil field keeps stable high yield, and its method is exactly focused on by the oil scattered in stratum in oil well to extract again.Because a lot of oil field belongs to fracture block oil field, each block water filling scope is little, and water injection rate needs often adjustment with the change of Exploitation Status.When oil extraction in oil field, need, constantly from outside toward producing horizon water filling, so that petroleum accumulation, improve oil-production efficiency, therefore, need to build water flooding pump station.Water flooding pump station forms an independently water supply network keep water pressure invariableness, to several flushings that quantity does not wait.In order to keep the constant of water flooding pump station water supply network hydraulic pressure, a water flooding pump station needs outfit 3 ~ 4 motor and corresponding opertaing device usually.As shown in Figure 1, be the pressure adjustment that 3 motors carry out water-injection plant.System realizes by regulating multiple stage pump motor the water supply needs recovered the oil, and needs to keep the stable of pressure in water system always.
Oil-field flooding control system of the prior art owing to lacking hydraulic pressure automatic control function, the mode that usual employing regulates manually.Waterflood system mainly by operating personnel by rule of thumb switch everywhere the parameter such as Valve controlling flow pressure produce, cannot the change of tracking in time manufacturing parameter, not only cause serious throttling waste, sometimes also can occur that large tank is found time because operational factor adjusts improper, the accident such as pipeline blocking or crude oil tank boil-overs.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of oil-field flooding automatic control system and method thereof, effectively can solve existing oil-field flooding control system to exist and cannot tracking in time manufacturing parameter change, not only cause serious throttling waste, also can adjust the improper technical matters causing industrial accident because of operational factor.
In order to realize foregoing invention object, the present invention specifically provides a kind of technic relization scheme of oil-field flooding automatic control system, a kind of oil-field flooding automatic control system, comprising: oil-field flooding automaton, frequency converter, motor, waterflood pump and pressure transducer.Described motor comprises a permanent magnet synchronous motors and two asynchronous motors, and described permagnetic synchronous motor and asynchronous machine are connected with each self-corresponding described waterflood pump respectively.Described oil-field flooding automaton gathers pipeline pressure signal by pressure transducer, and calculates pipeline pressure signal, to control switching and the speed governing operation of described permagnetic synchronous motor and asynchronous machine, realizes the steady of oil-field flooding hydraulic pressure.
Preferably, described permagnetic synchronous motor is as the homophony speed motor of described system, and described asynchronous machine is as motor for subsequent use.When described permagnetic synchronous motor cannot meet pipeline pressure requirement, make oil-field flooding stable water pressure at pressure constant state by automatically dropping into or excise described asynchronous motor, ensure that described automatic control system is in the highest operational efficiency simultaneously.
Preferably, described automatic control system also comprises temperature sensor, for gathering the temperature signal coming from described motor.Described oil-field flooding automaton comprises control module, A/D modular converter, communication management module and DI/DO module further.The signal that described pressure transducer and temperature sensor collect transfers to described control module after carrying out A/D conversion by described A/D modular converter.Described control module, after calculating, controls described frequency converter by described communication management module and realizes described electric machine speed regulation.Described control module controls the switching of described permagnetic synchronous motor and asynchronous machine simultaneously by described DI/DO module.
Preferably, described motor comprises following four kinds of running statuses:
State 1: when waterflood pump described in separate unit can meet pipeline pressure requirement, described permagnetic synchronous motor isolated operation;
State 2: when two described waterflood pumps can meet pipeline pressure requirement, a described asynchronous machine and a described permagnetic synchronous motor run simultaneously;
State 3: under the anhydrous condition of oil field, described automatic control system is shut down, described permagnetic synchronous motor and asynchronous machine out of service; Under there is regimen condition in oil field, described automatic control system Auto Power On runs;
State 4: under described permagnetic synchronous motor breaks down situation, the state that two asynchronous motors run simultaneously, a described asynchronous machine realizes speed governing operation by described frequency converter, and another described asynchronous machine runs on power frequency state.
Preferably, described control module, when described permagnetic synchronous motor and asynchronous machine switching or described pipeline pressure signal fluctuation exceed setting value, adopts fuzzy control method to realize electric machine speed regulation; And when described pipeline pressure signal fluctuation is lower than setting value, adopts pid control mode to realize electric machine speed regulation, keep the static stability of oil-field flooding hydraulic pressure.
Preferably, described oil-field flooding automaton adopts the control system based on PLC or DSP.Described oil-field flooding automaton also comprises man-machine interface, and described man-machine interface realizes the supervision to described oil-field flooding automatic control system running status, and the setting of controling parameters.
The present invention also specifically provides a kind of technic relization scheme of the oil-field flooding autocontrol method based on the automatic control realization of above-mentioned oil-field flooding in addition, said method comprising the steps of:
S100: described oil-field flooding automaton receives start up command signals, the state of described oil-field flooding automatic control system is judged, and the valve of associated pipe is operated, if non-fault, then start described frequency converter, if break down, trip and report to the police;
S101: after described frequency converter starts, enter the control to described permagnetic synchronous motor, the hydraulic pressure that the hydraulic pressure of setting and described pressure transducer feed back is compared, undertaken carrying out rotational speed regulation to described permagnetic synchronous motor by the output frequency controlling described frequency converter, thus realize the control to described hydraulic pressure;
S102: if described permagnetic synchronous motor moves to rated power when still not meeting the hydraulic pressure of described default, the output of permagnetic synchronous motor described in the temporarily disconnected of described oil-field flooding automaton, and start to carry out variable frequency control to realize soft start to a wherein described asynchronous machine for subsequent use, after described asynchronous machine has started, described asynchronous machine is cut power frequency operation pattern by converting operation pattern by described system, and enters step S101.
Preferably, described step S102 comprises further:
If described permagnetic synchronous motor moves to rated power when still not meeting the hydraulic pressure of described default, described system carries out timing, if within the time of setting, described system is still in Operation at full power, and actual hydraulic pressure and setting differential water pressures are apart from time larger, the output of permagnetic synchronous motor described in the temporarily disconnected of described oil-field flooding automaton.
Preferably, this step comprises further:
When described permagnetic synchronous motor breaks down, the parameter of electric machine for subsequent use inputs in described frequency converter by described system automatically, and control object is switched to described asynchronous machine for subsequent use, when controlling described asynchronous machine and carrying out speed governing operation, if described system discovery needs the input of carrying out described waterflood pump, and when another described asynchronous machine for subsequent use allows to drop into, described oil-field flooding automaton controls the current described asynchronous machine being in converting operation pattern and switches to power frequency operation pattern, complete another described asynchronous machine for subsequent use of startup after switching and carry out speed governing operation.
Preferably, described step S101 comprises further:
After described frequency converter starts, the hydraulic pressure that the hydraulic pressure of setting and described pressure transducer feed back compares by described oil-field flooding automaton, when described pipeline pressure signal fluctuation is lower than setting value, described oil-field flooding automaton realizes electric machine speed regulation by pid control mode, keeps the static stability of oil-field flooding hydraulic pressure; In described permagnetic synchronous motor and asynchronous machine switching process or when described pipeline pressure signal fluctuation exceedes setting value, described oil-field flooding automaton realizes electric machine speed regulation by fuzzy control method.
The oil-field flooding automatic control system provided by enforcement the invention described above and method thereof, have following technique effect:
(1) the present invention is by hydraulic pressure closed-loop control, successfully decrease manual intervention, and utilize frequency converter and magneto to raise the efficiency, reduce the use of electric energy, achieve the object of energy-saving and emission-reduction, significantly reduce labour intensity and the human cost of field worker, water injection rate regulates real-time good, overcomes prior art and can not regulate to water injection rate the technical matters causing actual oil-field flooding station all to there is rated flow and actual flow not matching timely and effectively;
(2) the present invention adopts permagnetic synchronous motor and asynchronous motor supplied with variable frequency to start control respectively according to different situations, effectively cooperation, seamless connection between the two, motor can not only be allowed can to operate in high-efficiency point in time, economize energy effectively, the life-span of motor can also be extended, improve the reliability of system;
(4) the present invention adopts permagnetic synchronous motor and asynchronous motor supplied with variable frequency point different situations to start, generally run permagnetic synchronous motor, in particular cases run asynchronous motor supplied with variable frequency, can greatly reduce operation noise, asynchronous motor supplied with variable frequency simultaneously owing to adopting frequency of operation adjustable, therefore reduce further self noise, and significantly improve work efficiency;
(5) the present invention adopts permagnetic synchronous motor and asynchronous motor supplied with variable frequency; and the running status of real time monitoring equipment and fault data; waterflood system is protected in time; when a motor or corresponding water pump break down wherein; switch seamlessly to another motor immediately, greatly provide the safety and reliability of system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structured flowchart of prior art oil-field flooding station pressure regulating system;
Fig. 2 is the system architecture diagram of a kind of embodiment of oil-field flooding automaton of the present invention;
Fig. 3 is the electrical-connection topological structure figure of a kind of embodiment of oil-field flooding automatic control system of the present invention;
Fig. 4 is the program flow diagram of a kind of embodiment of oil-field flooding autocontrol method of the present invention;
In figure: 1-oil-field flooding automaton, 2-frequency converter, 3-motor, 4-waterflood pump, 5-pressure transducer, 6-temperature sensor, 7-output switch cabinet one, 8-output switch cabinet two, 9-output switch cabinet three, 10-control module, 11-A/D modular converter, 12-communication management module, 13-DI/DO module, 14-power supply, 15-man-machine interface.
Embodiment
For the purpose of quoting and know, by the technical term hereinafter used, write a Chinese character in simplified form or abridge and be described below:
PLC:ProgrammableLogicController, the abbreviation of programmable logic controller (PLC), it adopts a class programmable memory, for its internally stored program, actuating logic computing, sequential control, regularly, counting and the user oriented instruction such as arithmetical operation, and by numeral or analog pattern input/output various types of machinery of control or production run;
PID:ProportionIntegrationDifferentiation, the abbreviation of PID control parameter;
CPU:CentralProcessingUnit, the abbreviation of central processing unit;
A/D:Analog/Digital, the abbreviation of analog/digital;
DI/DO:DigitalInput/DigitalOutput, the abbreviation of digital I/O.
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention.Obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in accompanying drawing 2 to accompanying drawing 4, give the specific embodiment of oil-field flooding automatic control system of the present invention and method thereof, below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 2, a kind of specific embodiment of oil-field flooding automatic control system, comprising: oil-field flooding automaton 1, frequency converter 2, motor 3, waterflood pump 4 and pressure transducer 5.Motor 3 comprises a permanent magnet synchronous motors and two asynchronous motors, and permagnetic synchronous motor and asynchronous machine are connected with each self-corresponding waterflood pump 4 respectively.Controlled the switching of permagnetic synchronous motor by output switch cabinet 1, control two asynchronous motors respectively by output switch cabinet 28 and output switch cabinet 39.Oil-field flooding automaton 1 gathers pipeline pressure signal by pressure transducer 5, and calculates pipeline pressure signal, to control switching and the speed governing operation of permagnetic synchronous motor and asynchronous machine, realizes the steady of oil-field flooding hydraulic pressure.Main control motor in water flooding pump station is replaced to permagnetic synchronous motor by the specific embodiment of the invention.Meanwhile, two asynchronous motors adopt the mode of the using and the reserved.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 to adopt based on the permagnetic synchronous motor of PLC and asynchronous motor control in the automatic control system of one, achieves the energy-saving and cost-reducing of waterflood system.
As one of the present invention preferably specific embodiment, permagnetic synchronous motor is as the homophony speed motor of oil-field flooding automatic control system, and asynchronous machine is further used as motor for subsequent use.When permagnetic synchronous motor cannot meet pipeline pressure requirement, make oil-field flooding stable water pressure at pressure constant state by automatically dropping into or excise asynchronous motor, ensure that automatic control system is in the highest operational efficiency simultaneously.
Automatic control system also comprises temperature sensor 6, for gathering the temperature signal coming from motor 3.Oil-field flooding automaton 1 comprises control module 10, A/D modular converter 11, communication management module 12, DI/DO module 13 and power supply 14 further.The signal that pressure transducer 5 and temperature sensor 6 collect transfers to control module 10 after carrying out A/D conversion by A/D modular converter 11, and control module 10, after calculating, controls frequency converter 2 by communication management module 12 and realizes electric machine speed regulation.Control module 10 controls the switching of permagnetic synchronous motor and asynchronous machine simultaneously by DI/DO module 13.Power supply 14 provides working power for control module 10.The system described in the specific embodiment of the invention gathers correlation parameter by the pressure transducer 5 in pipeline, the temperature sensor 6 in motor 3 and is fed through the control module 10 based on PLC by A/D modular converter 11, control module 10 carries out speed governing by computing to motor, control corresponding switch motion by DI/DO module 13 simultaneously, realize motor 3 in handoff procedure, ensure the steady of hydraulic pressure.
The oil-field flooding automatic control system that the specific embodiment of the invention describes achieves the switching of different motor 3 power frequency and converting operation state, due to the speed adjusting performance (high-level efficiency of wideband working range and speed governing) that permagnetic synchronous motor is outstanding, in the specific embodiment of the invention, used as special buncher by permagnetic synchronous motor, asynchronous motor is as motor for subsequent use.When permagnetic synchronous motor cannot reach ductwork pressure requirement, by automatically dropping into or excise an asynchronous motor make the present invention to meet state that waterflood system always works in constant voltage, ensure that system is in the highest operational efficiency all the time simultaneously.
Motor 3 comprises following four kinds of running statuses:
State 1: when separate unit waterflood pump 4 can meet pipeline pressure requirement, permagnetic synchronous motor isolated operation;
State 2: when two waterflood pumps 4 can meet pipeline pressure requirement, an asynchronous motors and a permanent magnet synchronous motors run simultaneously;
State 3: under the anhydrous condition of oil field, automatic control system shut down, permagnetic synchronous motor and asynchronous machine out of service; Under there is regimen condition in oil field, automatic control system Auto Power On runs;
State 4: under permagnetic synchronous motor breaks down situation, the state that two asynchronous motors run simultaneously, an asynchronous motors realizes speed governing operation by frequency converter 2, and another asynchronous motors runs on power frequency state.
As shown in Figure 3, automatic control system realizes closed loop PID and regulates, the pipe network data that pressure transducer 5 in control module 10 in access conduit feeds back, according to output frequency and the standby switching betting water pump 4 of the set point adjustment frequency converter 2 of user, meet the constant-pressure operation of system.Because the characteristic that water system caliber is large, pipe network pressurising is slower, the method that control module 10 adopts fuzzy control method to combine with pid control mode.Control module 10, when permagnetic synchronous motor and asynchronous machine switching or pipeline pressure signal fluctuation exceed setting value, adopts fuzzy control method to realize electric machine speed regulation.And when pipeline pressure signal fluctuation is lower than setting value, adopts pid control mode to realize electric machine speed regulation, keep the static stability of oil-field flooding hydraulic pressure.In fig. 3, output switch cabinet comprises contactor KM1, KM3, KM5, KM0, KM2 and KM4 further.Wherein, output switch cabinet 1 comprises contactor KM1 and contactor KM0, runs on power frequency pattern or frequency control pattern for switching permagnetic synchronous motor; Output switch cabinet 28 comprises contactor KM3 and contactor KM2, runs on power frequency pattern or frequency control pattern for switching an asynchronous motors; Output switch cabinet 1 comprises contactor KM5 and contactor KM4, runs on power frequency pattern or frequency control pattern for switching another asynchronous motors.
Oil-field flooding automaton 1 adopts the control system based on PLC or DSP.Oil-field flooding automaton 1 also comprises man-machine interface 15, and man-machine interface 15 realizes the supervision to oil-field flooding automatic control system running status, and the setting of controling parameters.By providing man-machine interface 15, further facilitate the adjustment that user carries out correlation parameter, and real-time monitored pressure.The logic control ability of the specific embodiment of the invention by utilizing PLC or DSP powerful, effectively can control frequency converter 2 and carry out speed governing, fully can meet the needs of field produces.A kind of preferred specific embodiment of the present invention, oil-field flooding automaton 1 adopts based on Siemens S7-200PLC parametric controller, by to frequency converter 2, and the electrically operated valve of waterflood pump 4 jointly controls, not only achieve the smooth starting of motor, decrease and electrical network is impacted, and pass through the constant control of PID control realization to hydraulic pressure.By man-machine interaction intuitively, greatly reduce manual intervention, greatly reduce the system failure because misoperation causes, greatly improve the reliability of oil field flood pattern.In addition, control system has native system and possesses perfect human-computer interaction interface, can be monitored and the setting of basic parameter by the running status of man-machine interface 15 pairs of whole systems.And possess the expanded function of telecommunication, and the industrial Fieldbus protocols of remote terminal is applied to by ModbusRTU(mono-kind) carry out communication expansion.Oil-field flooding automaton 1 can also adopt the platform based on other intelligent controllers to carry out Systematical control.
Oil-field flooding automatic control system of the present invention can realize hand/semi/full-automatic handoff functionality, is specifically described as follows:
Manual function: under manual ruuning situation, control system can carry out the adjustment of manual switching waterflood pump 4 and frequency converter 2 output frequency;
Semi-automatic function: under semi-automatic ruuning situation, control system starts or stops corresponding waterflood pump 4 according to the mode of Non-follow control, and the current motor 3 dragged by frequency converter 2 carries out speed governing operation;
Full-automatic function: in fully automatic operation situation, control system by according to time of line status and the start and stop of basic setup automatic decision waterflood pump and order, and carries out deciliter controlling to valve automatically, accomplishes that a key controls automatically.
Under control system can be implemented in different demand environments, the automatic switching of each motor 3, thus the switching realizing corresponding waterflood pump 4.Meanwhile, control system also possesses exchange-column shift function, and control system is by according to the factor automatic decision such as switching time, fault of waterflood pump 4 when switching waterflood pump 4.The electrically operated valve of respective line can also be opened and be closed to control system according to the running status of pipeline, automatically.By every detection and safeguard measure, system one key automatic operating can be realized.
As shown in Figure 4, a kind of specific embodiment of oil-field flooding automatic control system, comprises the following steps:
S100: oil-field flooding automaton 1 receives start up command signals, the state of oil-field flooding automatic control system is judged, and the valve of associated pipe is operated, if non-fault, then start frequency converter 2, if break down, trip and report to the police;
S101: after frequency converter 2 starts, enter the control to permagnetic synchronous motor, the hydraulic pressure that the hydraulic pressure of setting and pressure transducer 5 feed back is compared, is undertaken carrying out rotational speed regulation to permagnetic synchronous motor by the output frequency controlling frequency converter 2, thus realize the control to hydraulic pressure;
S102: if when permagnetic synchronous motor moves to the hydraulic pressure of rated power still discontented pedal system setting, the output of oil-field flooding automaton 1 temporarily disconnected permagnetic synchronous motor, and start to carry out variable frequency control to realize soft start to a wherein asynchronous machine for subsequent use, after asynchronous machine has started, asynchronous machine is cut power frequency operation pattern by converting operation pattern by system, and enters step S101.
Frequency converter 2 then enters into after starting and controls permagnetic synchronous motor, by pid control mode, setting hydraulic pressure and feedback hydraulic pressure is compared, then is regulated by the output frequency of pid control mode to frequency converter 2, thus carry out the control of hydraulic pressure.
Above-mentioned steps S102 comprises further:
If when permagnetic synchronous motor moves to the hydraulic pressure of rated power still discontented pedal system setting, system carries out timing, if within the time of setting, system is still in Operation at full power, and actual hydraulic pressure and setting differential water pressures are apart from time larger, the output of oil-field flooding automaton 1 temporarily disconnected permagnetic synchronous motor.
Oil-field flooding autocontrol method also comprises step S103, and this step comprises further:
When permagnetic synchronous motor breaks down, the parameter of electric machine for subsequent use inputs in frequency converter 2 by system automatically, and control object is switched to asynchronous machine for subsequent use.When controlling asynchronous machine and carrying out speed governing operation, if system discovery needs the input of carrying out waterflood pump 4.And when another asynchronous machine for subsequent use allows to drop into, oil-field flooding automaton 1 controls the current asynchronous machine being in converting operation pattern and switches to power frequency operation pattern, complete another asynchronous machine for subsequent use of startup after switching and carry out speed governing operation.
Above-mentioned steps S101 comprises further:
After frequency converter 2 starts, the hydraulic pressure that the hydraulic pressure of setting and pressure transducer 5 feed back compares by oil-field flooding automaton 1, when pipeline pressure signal fluctuation is lower than setting value, oil-field flooding automaton 1 realizes electric machine speed regulation by pid control mode, keeps the static stability of oil-field flooding hydraulic pressure.In permagnetic synchronous motor and asynchronous machine switching process or when pipeline pressure signal fluctuation exceedes setting value, oil-field flooding automaton 1 realizes electric machine speed regulation by fuzzy control method.
The specific embodiment of the invention utilizes pid control mode to realize hydraulic pressure and follows the tracks of, and realizes the constant of hydraulic pressure in conjunction with frequency converter timing technology.In control procedure, if water pressure fluctuations is in more among a small circle, pid control mode can excise to ensure that automatic control system is run at steady state automatically.If hydraulic pressure occurs abnormal, then can drop into pid control mode rapidly, and by the transitive relation between hydraulic pressure and rotating speed, can reach fast close to target hydraulic pressure.Finely tuned by pid control mode more afterwards, realize the quick response of system, reduce system shock.Oil-field flooding automatic control system of the present invention, under the requirement meeting oil field constant pressure water flooding, is taken into full account user operation, is operated by touch-screen, greatly reduce manual intervention, improve the reliability of system, and realize the control model of a key robotization, greatly save human cost.And internet remote access interface can be provided, real unmanned can be realized.The system that the specific embodiment of the invention describes utilizes PLC to carry out Systematical control, hydraulic pressure closed-loop control is carried out by PLC, successfully reduce manual intervention, and utilize frequency converter 2 and permagnetic synchronous motor to raise the efficiency, reduce the use of electric energy, successfully achieve the object of energy-saving and emission-reduction.And the running status of real-time monitoring system and fault data, oil-field flooding automatic control system is protected in time.
By implementing oil-field flooding automatic control system and the method thereof of specific embodiment of the invention description, following technique effect can be reached:
(1) technical scheme that the specific embodiment of the invention describes passes through hydraulic pressure closed-loop control, successfully decrease manual intervention, and utilize frequency converter and magneto to raise the efficiency, reduce the use of electric energy, achieve the object of energy-saving and emission-reduction, significantly reduce labour intensity and the human cost of field worker, water injection rate regulates real-time good, overcomes prior art and can not regulate to water injection rate the technical matters causing actual oil-field flooding station all to there is rated flow and actual flow not matching timely and effectively;
(2) technical scheme that the specific embodiment of the invention describes adopts permagnetic synchronous motor and asynchronous motor supplied with variable frequency to start control respectively according to different situations, effectively cooperation, seamless connection between the two, motor can not only be allowed to operate in high-efficiency point in time, economize energy effectively, the life-span of motor can also be extended, improve the reliability of system;
(3) technical scheme that the specific embodiment of the invention describes carries out soft opening or soft stop operation by soft opening device to asynchronous motor supplied with variable frequency, and by inverter, speed governing is carried out to permagnetic synchronous motor, effectively can avoid electric motor starting, and to the switching shock that electrical network produces in motor handoff procedure, and greatly can improve energy utilization rate;
(4) technical scheme that the specific embodiment of the invention describes adopts permagnetic synchronous motor and asynchronous motor supplied with variable frequency to divide different situations to start, generally run permagnetic synchronous motor, in particular cases run asynchronous motor supplied with variable frequency, can greatly reduce operation noise, asynchronous motor supplied with variable frequency simultaneously owing to adopting frequency of operation adjustable, therefore reduce further self noise, and significantly improve work efficiency;
(5) technical scheme that the specific embodiment of the invention describes adopts permagnetic synchronous motor and asynchronous motor supplied with variable frequency; and the running status of real time monitoring equipment and fault data; waterflood system is protected in time; when a motor or corresponding water pump break down wherein; switch seamlessly to another motor immediately, drastically increase the safety and reliability of system.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to the present invention.Although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention.Any those of ordinary skill in the art, when not departing from Spirit Essence of the present invention and technical scheme, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent replacement, equivalence change and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (10)
1. an oil-field flooding automatic control system, it is characterized in that, comprise: oil-field flooding automaton (1), frequency converter (2), motor (3), waterflood pump (4) and pressure transducer (5), described motor (3) comprises a permanent magnet synchronous motors and two asynchronous motors, and described permagnetic synchronous motor and asynchronous machine are connected with each self-corresponding described waterflood pump (4) respectively; Described oil-field flooding automaton (1) gathers pipeline pressure signal by pressure transducer (5), and pipeline pressure signal is calculated, to control switching and the speed governing operation of described permagnetic synchronous motor and asynchronous machine, realize the steady of oil-field flooding hydraulic pressure.
2. a kind of oil-field flooding automatic control system according to claim 1, is characterized in that: described permagnetic synchronous motor is as the homophony speed motor of described system, and described asynchronous machine is as motor for subsequent use; When described permagnetic synchronous motor cannot meet pipeline pressure requirement, make oil-field flooding stable water pressure at pressure constant state by automatically dropping into or excise described asynchronous motor, ensure that described automatic control system is in the highest operational efficiency simultaneously.
3. a kind of oil-field flooding automatic control system according to claim 1 and 2, it is characterized in that: described automatic control system also comprises temperature sensor (6), for gathering the temperature signal coming from described motor (3), described oil-field flooding automaton (1) comprises control module (10), A/D modular converter (11), communication management module (12) and DI/DO module (13) further; The signal that described pressure transducer (5) and temperature sensor (6) collect transfers to described control module (10) after carrying out A/D conversion by described A/D modular converter (11), described control module (10), after calculating, controls described frequency converter (2) by described communication management module (12) and realizes described electric machine speed regulation; Described control module (10) controls the switching of described permagnetic synchronous motor and asynchronous machine simultaneously by described DI/DO module (13).
4. a kind of oil-field flooding automatic control system according to claim 3, is characterized in that, described motor (3) comprises following four kinds of running statuses:
State 1: when waterflood pump described in separate unit (4) can meet pipeline pressure requirement, described permagnetic synchronous motor isolated operation;
State 2: when two described waterflood pumps (4) can meet pipeline pressure requirement, a described asynchronous machine and a described permagnetic synchronous motor run simultaneously;
State 3: under the anhydrous condition of oil field, described automatic control system is shut down, described permagnetic synchronous motor and asynchronous machine out of service; Under there is regimen condition in oil field, described automatic control system Auto Power On runs;
State 4: under described permagnetic synchronous motor breaks down situation, the state that two asynchronous motors run simultaneously, a described asynchronous machine realizes speed governing operation by described frequency converter (2), and another described asynchronous machine runs on power frequency state.
5. a kind of oil-field flooding automatic control system according to claim 4, it is characterized in that: described control module (10), when described permagnetic synchronous motor and asynchronous machine switching or described pipeline pressure signal fluctuation exceed setting value, adopts fuzzy control method to realize electric machine speed regulation; And when described pipeline pressure signal fluctuation is lower than setting value, adopts pid control mode to realize electric machine speed regulation, keep the static stability of oil-field flooding hydraulic pressure.
6. according to a kind of oil-field flooding automatic control system in claim 1,2,4,5 described in arbitrary claim, it is characterized in that: described oil-field flooding automaton (1) adopts the control system based on PLC or DSP; Described oil-field flooding automaton (1) also comprises man-machine interface (15), and described man-machine interface (15) realizes the supervision to described oil-field flooding automatic control system running status, and the setting of controling parameters.
7. realize based on the system described in claim arbitrary in claim 1 to 6 method that oil-field flooding controls automatically, it is characterized in that, comprise the following steps:
S100: described oil-field flooding automaton (1) receives start up command signals, the state of described oil-field flooding automatic control system is judged, and the valve of associated pipe is operated, if non-fault, then start described frequency converter (2), if break down, trip and report to the police;
S101: after described frequency converter (2) starts, enter the control to described permagnetic synchronous motor, the hydraulic pressure that the hydraulic pressure of setting and described pressure transducer (5) feed back is compared, undertaken carrying out rotational speed regulation to described permagnetic synchronous motor by the output frequency controlling described frequency converter (2), thus realize the control to described hydraulic pressure;
S102: if described permagnetic synchronous motor moves to rated power when still not meeting the hydraulic pressure of described default, the output of permagnetic synchronous motor described in the temporarily disconnected of described oil-field flooding automaton (1), and start to carry out variable frequency control to realize soft start to a wherein described asynchronous machine for subsequent use, after described asynchronous machine has started, described asynchronous machine is cut power frequency operation pattern by converting operation pattern by described system, and enters step S101.
8. a kind of oil-field flooding autocontrol method according to claim 7, it is characterized in that, described step S102 comprises further:
If described permagnetic synchronous motor moves to rated power when still not meeting the hydraulic pressure of described default, described system carries out timing, if within the time of setting, described system is still in Operation at full power, and actual hydraulic pressure and setting differential water pressures are apart from time larger, the output of permagnetic synchronous motor described in the temporarily disconnected of described oil-field flooding automaton (1).
9. a kind of oil-field flooding autocontrol method according to claim 7 or 8, it is characterized in that, described method also comprises step S103, and this step comprises further:
When described permagnetic synchronous motor breaks down, the parameter of electric machine for subsequent use inputs in described frequency converter (2) by described system automatically, and control object is switched to described asynchronous machine for subsequent use, when controlling described asynchronous machine and carrying out speed governing operation, if described system discovery needs the input of carrying out described waterflood pump (4), and when another described asynchronous machine for subsequent use allows to drop into, described oil-field flooding automaton (1) controls the current described asynchronous machine being in converting operation pattern and switches to power frequency operation pattern, complete another described asynchronous machine for subsequent use of startup after switching and carry out speed governing operation.
10. a kind of oil-field flooding autocontrol method according to claim 9, is characterized in that: described step S101 comprises further:
After described frequency converter (2) starts, the hydraulic pressure that the hydraulic pressure of setting and described pressure transducer (5) feed back compares by described oil-field flooding automaton (1), when described pipeline pressure signal fluctuation is lower than setting value, described oil-field flooding automaton (1) realizes electric machine speed regulation by pid control mode, keeps the static stability of oil-field flooding hydraulic pressure; In described permagnetic synchronous motor and asynchronous machine switching process or when described pipeline pressure signal fluctuation exceedes setting value, described oil-field flooding automaton (1) realizes electric machine speed regulation by fuzzy control method.
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| CN111208852A (en) * | 2020-02-28 | 2020-05-29 | 安徽物迅科技有限公司 | Digital watering valve system |
| CN114019890A (en) * | 2021-10-22 | 2022-02-08 | 山信软件股份有限公司 | Organic waste gas ultralow emission control method |
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