CN105221123A - Oil-field flooding constant voltage automatic control system and method thereof - Google Patents
Oil-field flooding constant voltage automatic control system and method thereof Download PDFInfo
- Publication number
- CN105221123A CN105221123A CN201410229956.9A CN201410229956A CN105221123A CN 105221123 A CN105221123 A CN 105221123A CN 201410229956 A CN201410229956 A CN 201410229956A CN 105221123 A CN105221123 A CN 105221123A
- Authority
- CN
- China
- Prior art keywords
- permagnetic synchronous
- variable frequency
- synchronous motor
- inverter
- pressure value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a kind of oil-field flooding constant voltage automatic control system and method thereof, system comprises: input isolating switch, fairing, inverter, filter, soft opening device, output isolation and switching device, control device, permagnetic synchronous motor and asynchronous motor supplied with variable frequency.Input isolating switch input is connected with three-phase alternating current electrical network, and input isolating switch output is connected with fairing, soft opening device respectively.Fairing is connected with inverter, and inverter is connected with filter input, and filter is connected with output isolation and switching device.Export isolation and switching device output to be connected with corresponding water pump respectively by permagnetic synchronous motor, asynchronous motor supplied with variable frequency.Control device controls input isolating switch, inverter, soft opening device and output isolation and switching device respectively.The present invention can solve the technical problems such as existing water filling device energy consumption is large, labor strength is high, system reliability is low, maintainability is poor, motor noise is large, efficiency is low.
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 the oil scattered in stratum is focused on oil well extract up 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.During oil extraction in oil field, need, constantly from outside toward producing horizon water filling, so that oil accumulation, improve oil recovery 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 control appliance, as shown in Figure 1, is the pressure adjustment that 3 motors carry out water-injection station in figure.
At present, most domestic oil-field flooding station generally adopts the manual control mode of " electrical network+converter plant+common asynchronous moter+water pump+Non-follow control " to carry out the adjustment of water injection rate.Adopt manual control mode to carry out the adjustment of Oilfield Water Injection Rate, common asynchronous moter directly starts driving water pump, and adjustment process is by controlling manually, and this is the water injection rate control method that current oil field flood pattern often adopts.The shortcoming of manual control mode is: Non-follow control causes that field worker labour intensity is large, human cost is high, asynchronous machine self noise is large, efficiency is low, temperature rise, can cause larger pollution while wasting energy to the working environment at scene.Meanwhile, rely on Non-follow control, water injection rate regulates poor real, and owing to not regulating water injection rate timely and effectively, actual oil-field flooding station all exists the problem that metered flow and actual flow do not match, and this just causes very large energy waste.
Along with the development of technology, mode that Some Domestic oil-field flooding station also uses " electrical network+converter plant+changeover switch+common asynchronous moter+water pump+manual/auto control " carries out the adjustment of water injection rate.A kind of typical oil-field flooding automatic frequency-conversion control system circuit diagram as shown in Figure 2.Adopt three asynchronous motors to carry out the adjustment of water injection rate pressure in accompanying drawing 2, electrical network electric energy is delivered to frequency converter by system main breaker, regulates Rotational Speed of Asynchronous Motor to carry out the adjustment of hydraulic pressure by frequency converter.When needs start multiple asynchronous motors, by changeover switch, the asynchronous machine run is departed from frequency converter be connected to electrical network, to the asynchronous machine started be needed to be connected to output side transducer simultaneously, by Frequency Converter Control, it carries out speed governing (as: changeover switch KM0 closes a floodgate, other switch separating brakes, Frequency Converter Control 1# motor runs; When also needing to start 2# motor, KM0 separating brake, KM1, KM2 close a floodgate simultaneously, Frequency Converter Control 2# electric machine speed regulation).System carries out the collection of hydraulic pressure by sensor, and signal is reached PLC, is automatically controlled whole system by PLC.
The defect of this mode is: automatically control because adjustment process adopts, effectively can reduce the labour intensity of field worker, and part solves the real time problems that water injection rate regulates, and allows motor can operate in high-efficiency point in time, can energy conservation effectively.But because the electrical network switching shock produced when different asynchronous machine starts is very large, the conversion simultaneously run between different motor need be completed by changeover switch, in startup and transfer process, all can produce considerable influence to the application life of motor etc., reduce system reliability.Meanwhile, due to the characteristic of asynchronous machine itself, still the problems such as noise is large, operational efficiency is low, reliability is low can be produced.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of oil-field flooding constant voltage automatic control system and method thereof, effectively can solve that existing oil-field water injection device energy consumption is large, labor strength is high, system reliability is low, maintainability is poor, motor noise is large, inefficient technical problem.
In order to realize foregoing invention object, the present invention specifically provides a kind of technic relization scheme of oil-field flooding constant voltage automatic control system, a kind of oil-field flooding constant voltage automatic control system, comprising: input isolating switch, fairing, inverter, filter, soft opening device, output isolation and switching device, control device, permagnetic synchronous motor and asynchronous motor supplied with variable frequency.The input of described input isolating switch is connected with the three-phase alternating current electrical network of outside, the output of described input isolating switch is connected with described fairing, soft opening device respectively, described fairing is connected with described inverter, and described inverter is connected with the input of described filter.Described filter, soft opening device are connected with described output isolation and switching device respectively, the output of described output isolation and switching device is connected with the corresponding water pump of outside respectively by described permagnetic synchronous motor, asynchronous motor supplied with variable frequency, and described control device controls described input isolating switch, inverter, soft opening device and output isolation and switching device respectively.
Preferably, described fairing adopts diode rectification mode, and the alternating voltage that described three-phase alternating current electrical network exports is transformed into DC voltage, comes from the energy of three-phase alternating current electrical network to described inverter transmission simultaneously.The DC voltage inversion that described fairing transmission comes by described inverter is alternating current, and carries out filtering process by described filter, then transfers to described permagnetic synchronous motor or the use of described asynchronous motor supplied with variable frequency by described output isolation and switching device.Described soft opening device carries out soft opening or soft stop operation to described asynchronous motor supplied with variable frequency.
Preferably, when the adjustment of water filling hydraulic pressure is carried out in oil field, described control device reads the hydraulic pressure value coming from described water pump, by described hydraulic pressure value and setup pressure value are compared, control described inverter and regulate described permagnetic synchronous motor, or control described soft opening device adjustment asynchronous motor supplied with variable frequency.
Preferably, when the hydraulic pressure value coming from described water pump is less than setup pressure value, described control device carries out acceleration by described inverter to described permagnetic synchronous motor and regulates; If when the rotating speed of described permagnetic synchronous motor reaches specified, described hydraulic pressure value still can not meet waterflooding requirement, then the described soft opening device of described control device control starts described asynchronous motor supplied with variable frequency; After described asynchronous motor supplied with variable frequency normally runs, described control device carries out the rotational speed regulation of described permagnetic synchronous motor according to the hydraulic pressure value of described water pump, to meet the needs of water injection pressure.
Preferably, when the hydraulic pressure value coming from described water pump is more than or equal to setup pressure value, described control device carries out deceleration by described inverter to described permagnetic synchronous motor and regulates; If when the rotating speed of described permagnetic synchronous motor reaches minimum, described hydraulic pressure value still can not meet waterflooding requirement, then described control device controls asynchronous motor supplied with variable frequency described in soft opening device soft stop; After described asynchronous motor supplied with variable frequency stops, described control device carries out the rotational speed regulation of described permagnetic synchronous motor according to the hydraulic pressure value of described water pump, to meet the needs of water injection pressure.
Preferably, described output isolation and switching device comprises the first contactor and the second contactor further, described first contactor is connected between described filter and described permagnetic synchronous motor, and described second contactor is connected between described filter and described asynchronous motor supplied with variable frequency.When the water pump of described permagnetic synchronous motor or its correspondence breaks down, described first contactor separating brake, described second contactor closes a floodgate, utilize described inverter to control adjustment that described asynchronous motor supplied with variable frequency carries out described water pump water injection pressure, the 4th contactor corresponding with described soft opening device front end in described input isolating switch is in gate-dividing state.
Preferably, described inverter drives described permagnetic synchronous motor to run by vector control mode, and described inverter drives described asynchronous motor supplied with variable frequency to run by voltage/frequency conversion control mode.
The present invention also specifically provides a kind of technic relization scheme of oil-field flooding constant voltage autocontrol method in addition, oil-field flooding constant voltage automatic control system comprises inverter, soft opening device, control device, permagnetic synchronous motor and asynchronous motor supplied with variable frequency, said method comprising the steps of:
When the adjustment of water filling hydraulic pressure is carried out in oil field, described control device reads the hydraulic pressure value coming from water pump, by described hydraulic pressure value and setup pressure value are compared, control described inverter to regulate described permagnetic synchronous motor or control described soft opening device and regulate described asynchronous motor supplied with variable frequency, change the output pressure of described water pump, realize the automatic adjustment of water injection rate.
Preferably, when the hydraulic pressure value coming from described water pump is less than setup pressure value, described control device carries out acceleration by described inverter to described permagnetic synchronous motor and regulates; If when the rotating speed of described permagnetic synchronous motor reaches specified, described hydraulic pressure value still can not meet waterflooding requirement, then the described soft opening device of described control device control starts described asynchronous motor supplied with variable frequency; After described asynchronous motor supplied with variable frequency normally runs, described control device carries out the rotational speed regulation of described permagnetic synchronous motor according to the hydraulic pressure value of described water pump, to meet the needs of water injection pressure.
Preferably, when the hydraulic pressure value coming from described water pump is more than or equal to setup pressure value, described control device carries out deceleration by described inverter to described permagnetic synchronous motor and regulates; If when the rotating speed of described permagnetic synchronous motor reaches minimum, described hydraulic pressure value still can not meet waterflooding requirement, then described control device controls asynchronous motor supplied with variable frequency described in soft opening device soft stop; After described asynchronous motor supplied with variable frequency stops, described control device carries out the rotational speed regulation of described permagnetic synchronous motor according to the hydraulic pressure value of described water pump, to meet the needs of water injection pressure.
Preferably, described oil-field flooding constant voltage automatic control system also comprises fairing, filter and output isolation and switching device.The alternating voltage that the three-phase alternating current electrical network of outside exports is transformed into DC voltage by described fairing, comes from the energy of three-phase alternating current electrical network to described inverter transmission simultaneously.The DC voltage inversion that described fairing transmission comes by described inverter is alternating current, and carries out filtering process by described filter, then is sent to described permagnetic synchronous motor or the use of described asynchronous motor supplied with variable frequency by described output isolation and switching device.Described soft opening device carries out soft opening or soft stop operation to described asynchronous motor supplied with variable frequency.
Preferably, when the water pump of described permagnetic synchronous motor or its correspondence breaks down, disconnect the connection between described filter and described permagnetic synchronous motor, connect the path between described filter and described asynchronous motor supplied with variable frequency, and the connection between the three-phase alternating current electrical network of disconnecting external and described soft opening device, control by described inverter the adjustment that described asynchronous motor supplied with variable frequency carries out described water pump water injection pressure.
The oil-field flooding constant voltage automatic control system provided by enforcement the invention described above and method thereof, have following technique effect:
(1) the present invention significantly reduces labour intensity and the human cost of field worker by constant voltage automatic control mode, water injection rate regulates real-time good, overcomes prior art and can not regulate to water injection rate the technical problem causing actual oil-field flooding station all to there is metered 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, energy conservation effectively, the life-span of motor can also be extended, improve the reliability of system;
(3) the present invention 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) 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 operating frequency adjustable, therefore reduce further self noise, and significantly improve operating efficiency;
(5) the present invention adopts permagnetic synchronous motor and asynchronous motor supplied with variable frequency, when a motor or corresponding water pump break down wherein, switches seamlessly to another motor immediately, greatly provides 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 electric topology structure chart of prior art oil-field flooding automatic frequency-conversion control system;
Fig. 3 is the system architecture diagram of a kind of detailed description of the invention of oil-field flooding constant voltage automatic control system of the present invention;
Fig. 4 is the electric topology structure chart of a kind of detailed description of the invention of oil-field flooding constant voltage automatic control system of the present invention;
Fig. 5 is the circuit topological structure figure of fairing in a kind of detailed description of the invention of oil-field flooding constant voltage automatic control system of the present invention;
Fig. 6 is the connecting structure for electrical equipment figure exporting isolation and switching device in a kind of detailed description of the invention of oil-field flooding constant voltage automatic control system of the present invention;
In figure: 1-automatic control system, 2-three-phase alternating current electrical network, 3-inputs isolating switch, 4-fairing, 5-inverter, 6-filter, the soft opening device of 7-, 8-exports isolation and switching device, 9-control device, 10-permagnetic synchronous motor, 11-asynchronous motor supplied with variable frequency, 12-water pump.
Detailed description of the invention
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:
PWM:PulseWidthModulation, the abbreviation of pulse width modulation, be utilize the numeral of microprocessor to export the very effective technology of one controlled analog circuit, be widely used in and control with many fields of conversion from measurement, the power that communicates;
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 manufacturing process;
V/f: the abbreviation of voltage/frequency conversion.
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 3 to accompanying drawing 6, give the specific embodiment of oil-field flooding constant voltage 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.
In order to technical problems such as the oil-field water injection device labor strength solving prior art existence are high, energy consumption is large, motor noise is large, reliability is low, as shown in Figure 3, a specific embodiment for oil-field flooding constant voltage automatic control system, automatic control system 1 comprises: input isolating switch 3, fairing 4, inverter 5, filter 6, soft opening device 7, output isolation and switching device 8, control device 9, permagnetic synchronous motor 10 and asynchronous motor supplied with variable frequency 11.The input input of isolating switch 3 is connected with the three-phase alternating current electrical network 2 of outside, the output of input isolating switch 3 is connected with fairing 4, soft opening device 7 respectively, fairing 4 is connected with inverter 5, inverter 5 is connected with the input of filter 6, and filter 6, soft opening device are connected with output isolation and switching device 8 respectively.The output exporting isolation and switching device 8 is connected with the corresponding water pump 12 of outside respectively by permagnetic synchronous motor 10, asynchronous motor supplied with variable frequency 11, and control device 9 carries out automatic or manual control to input isolating switch 3, inverter 5, soft opening device 7 and output isolation and switching device 8 respectively.
As a kind of typical specific embodiment of the present invention, fairing 4 adopts diode rectification mode further, and the alternating voltage that three-phase alternating current electrical network 2 exports is transformed into DC voltage, comes from the energy of three-phase alternating current electrical network 2 to inverter 5 transmission simultaneously.It is alternating current that fairing 4 is transmitted the DC voltage inversion come by inverter 5, and carries out filtering process by filter 6, then by exporting isolation and switching device 8 and transfer to permagnetic synchronous motor 10 or asynchronous motor supplied with variable frequency 11 using.Soft opening device 7 pairs of asynchronous motor supplied with variable frequencies 11 carry out soft opening or soft stop operation.
Wherein, three-phase alternating current electrical network 2 provides three-phase alternating-current supply for automatic control system 1, and water pump 12 carries out the adjustment of hydraulic pressure by driven by motor.
Path is provided between the output that input isolating switch 3 is three-phase alternating current electrical network 2 and fairing 4; breakpoint is provided when needs overhaul system; and can in case of emergency system and three-phase alternating current electrical network 2 be isolated, and system protection is provided, improve safety and the reliability of system.
The voltage transformation that three-phase alternating current electrical network exchanges 2 is become easy-to-handle DC voltage, for the equipment use of its rear end by fairing 4.As shown in Figure 5, the front end of fairing 4 is provided with input reactance device L, reduces or eliminates diode rectification to the impact of three-phase alternating current electrical network 2.The DC side of fairing 4 arranges direct current reactor Ld, effectively can suppress the infringement that the electric current that input power loop is flow through causes fairing 4 while stable DC.The DC inversion that fairing 4 exports by inverter 5 be voltage, frequency-adjustable three-phase alternating voltage for permagnetic synchronous motor 10 or asynchronous motor supplied with variable frequency 11.Meanwhile, inverter 5 can provide vector control function to drive permagnetic synchronous motor 10 to run, and v/f controlling functions can be provided to drive asynchronous motor supplied with variable frequency 11 to run.V/f controls namely to ensure that output voltage is directly proportional with frequency, the magnetic flux of motor can be made to keep certain, avoid the generation of weak magnetic and magnetic saturation phenomenon.The principle that v/f controls is the circuit (be called voltage-controlled oscillator (VCO) again, it is a kind of pressure-sensitive capacitance) producing frequency of oscillation, and when being subject to the voltage of a change, its capacity also can change accordingly, and the electric capacity of change causes the change of frequency of oscillation, produces frequency conversion.This controlled frequency for controlling the frequency of output voltage, controlled motor speed is changed.The magnetic flux of the torque motor of frequency conversion asynchronous motor 11 and the interphase interaction of internal flow overcurrent produce, and under rated frequency, if voltage necessarily and only reduces frequency, so magnetic flux is just excessive, and magnetic loop is saturated, by motor damage time serious.Therefore, frequency and voltage will change pro rata, control the output voltage of frequency converter while namely changing frequency, make the magnetic flux of motor keep certain, avoid the generation of weak magnetic and magnetic saturation phenomenon.And vector control mode (VC, VectorControl, the abbreviation of vector controlled) be then stator current vector by measuring and control motor, respectively the exciting current of motor and torque current are controlled according to field orientation principle, thus reach the object controlling motor torque.
Because the long meeting of operation cable between the frequency converter that is made up of fairing 4 and inverter 5 and motor to produce the crest voltage of devastating impact to motor; filter 6 adopts dv/dt wave filter further in this case; the dv/dt value exported for suppressing inverter 5, reduces the overvoltage of long cable generation, the insulation of protection motor, raising electrical machinery life.Soft opening device 7, when system needs, starts asynchronous motor supplied with variable frequency 11, and its bypass is run to three-phase alternating current electrical network 2 after asynchronous motor supplied with variable frequency 11 normally runs, and can provide the protections such as overvoltage, overcurrent, excess temperature for asynchronous motor supplied with variable frequency 11 simultaneously.The voltage that soft opening device 7 exports asynchronous motor supplied with variable frequency 11 to slowly rises to rated voltage by zero, makes the overall process that asynchronous motor supplied with variable frequency 11 is starting there is not impact torque, realizes level and smooth start-up and operation.Soft opening device 7 in the specific embodiment of the invention, can softly open or soft stop asynchronous motor supplied with variable frequency 11, while reduction Systematical control complexity, effectively can reduce the impact to three-phase alternating current electrical network 2 when asynchronous motor supplied with variable frequency 11 starts.
Exporting the first contactor KM1 in isolation and switching device 8 for permagnetic synchronous motor 10 and inverter 5 provides power path.When the water pump 12 of permagnetic synchronous motor 10 or its correspondence breaks down, disconnect the first contactor KM1, close the second contactor KM2, make inverter 5 control asynchronous motor supplied with variable frequency 11 in short-term to run, reach in short-term for flood pattern provides the object of hydraulic pressure, maintain the normal operation in oil field, reduce the economic loss because permagnetic synchronous motor 10 or its corresponding water pump 12 damage and cause.
The force value that control device 9 is fed back by pressure sensor and setup pressure value compare, and control the adjustment of hydraulic pressure.In the specific embodiment of the invention, control device 9 adopts PLC(programmable logic controller (PLC)), certain PLC performing process controlling functions can also be central processing unit (CPU), flush bonding processor, microcontroller (MCU), digital signal processor (DSP), single-chip microcomputer, SOC(system on a chip) (SOC), PLD, and the other forms of arbitrarily device with control, processing capacity well known in the art.Because the water injection rate of oil field flood pattern needs often to adjust with the change of Exploitation Status, invention automatic control system according to this utilizes the pressure sensor in PLC to monitor the hydraulic pressure exported, and the hydraulic pressure value monitored is fed back to PLC, by PLC, feedback hydraulic pressure value and setting hydraulic pressure value are contrasted, thus control inverter 5 pairs of permagnetic synchronous motors 10 carry out speed governing, change the output pressure of water pump 12, reach the object that water injection rate regulates.Adopt the control device 9 of PLC can automatically adjust the output of inverter 5 and the start and stop of soft opening device 7 according to the force value of pressure sensor feedback, without the need to manual intervention, greatly reduce the labour intensity of workman, improve the real-time of system.
Permagnetic synchronous motor 10 adopts high performance permanent-magnet material as pole wheel, the advantages such as efficiency is high, noise is little, temperature rise is low, speed-regulating range width that it has, and simplifies the structure of motor, improves the magnetic energy reserves of motor.Due to the characteristic properties of rare earth permanent-magnetic material, this permagnetic synchronous motor 10 all can keep higher efficiency and power factor in the rated operating range of 25% ~ 120%, thus energy-saving effect is more obvious when light running, preferably as the use of pressure zeroing pump.Compared with the common asynchronous moter of same power, permagnetic synchronous motor 10 volume is little, lightweight, operation is more reliable.Meanwhile, its rated efficiency comparatively common asynchronous moter improves 3% ~ 5%, and average power saving rate is more than 10%.In addition, permagnetic synchronous motor 10 adopts F class B insulation, can run without interruption for a long time, avoids because problem of temperature rise frequently falls the trouble of pump.Specific embodiment of the invention employing asynchronous motor supplied with variable frequency 11 substitutes common asynchronous moter and carries out hydraulic pressure adjustment, can normally run on frequency conversion operating mode, reduce or eliminate converter plant dv/dt value to the impact of electrical machine insulation, further increasing compliance and the reliability of system than common asynchronous moter.When oil field carry out water filling hydraulic pressure regulate time, control device 9 reads and comes from the hydraulic pressure value of water pump 12, and by hydraulic pressure value and setup pressure value being compared, control inverter 5 regulates permagnetic synchronous motor 10, or controls soft opening device 7 and regulate asynchronous motor supplied with variable frequency 11.
When the hydraulic pressure value coming from water pump 12 is lower than setup pressure value, control device 9 carries out acceleration by inverter 5 pairs of permagnetic synchronous motors 10 and regulates, to promote hydraulic pressure.If when the rotating speed of permagnetic synchronous motor 10 reaches specified, hydraulic pressure value does not reach setup pressure value, still waterflooding requirement can not be met, then control device 9 controls soft opening device 7 and starts asynchronous motor supplied with variable frequency 11, after asynchronous motor supplied with variable frequency 11 normally runs, control device 9 carries out the rotational speed regulation of permagnetic synchronous motor 10 according to the hydraulic pressure value of water pump 12, to meet the needs of water injection pressure.
When the hydraulic pressure value coming from water pump 12 is greater than or equal to setup pressure value, control device 9 carries out deceleration by inverter 5 pairs of permagnetic synchronous motors 10 and regulates, to reduce hydraulic pressure.If when the rotating speed of permagnetic synchronous motor 10 reaches minimum, hydraulic pressure value does not reach setup pressure value, still can not meet waterflooding requirement, then control device 9 controls soft opening device 7 soft stop asynchronous motor supplied with variable frequency 11.After asynchronous motor supplied with variable frequency 11 stops, control device 9 carries out the rotational speed regulation of permagnetic synchronous motor 10 according to the hydraulic pressure value of water pump 12, to meet the needs of water injection pressure.
As shown in accompanying drawing 4 and accompanying drawing 6, export isolation and switching device 8 and comprise the first contactor KM1 and the second contactor KM2 further, first contactor KM1 is connected between filter 6 and permagnetic synchronous motor 10, and the second contactor KM2 is connected between filter 6 and asynchronous motor supplied with variable frequency 11.Input isolating switch 3 comprises the 3rd contactor KM3 and the 4th contactor KM4 further.When the water pump 12 of permagnetic synchronous motor 10 or its correspondence breaks down, the first contactor KM1 separating brake, the second contactor KM2 closes a floodgate, utilize inverter 5 to control adjustment that asynchronous motor supplied with variable frequency 11 carries out water pump 12 water injection pressure.Now, input the four contactor KM4 corresponding with soft opening device 7 front end in isolating switch 3 and be in gate-dividing state.
As one of the present invention preferably specific embodiment, inverter 5 drives permagnetic synchronous motor 10 to run further by vector control mode, and drives asynchronous motor supplied with variable frequency 11 to run further by voltage/frequency conversion control mode.
A kind of specific embodiment of oil-field flooding constant voltage autocontrol method, oil-field flooding constant voltage automatic control system comprises inverter 5, soft opening device 7, control device 9, permagnetic synchronous motor 10 and asynchronous motor supplied with variable frequency 11, and oil-field flooding constant voltage autocontrol method comprises the following steps:
When the adjustment of water filling hydraulic pressure is carried out in oil field, control device 9 reads the hydraulic pressure value coming from water pump 12, by hydraulic pressure value and setup pressure value are compared, control inverter 5 and regulate permagnetic synchronous motor 10, or control soft opening device 7 and regulate asynchronous motor supplied with variable frequency 11, change the output pressure of water pump 12, realize the automatic adjustment of water injection rate.
When the hydraulic pressure value coming from water pump 12 is less than setup pressure value, control device 9 carries out acceleration by inverter 5 pairs of permagnetic synchronous motors 10 and regulates.If when the rotating speed of permagnetic synchronous motor 10 reaches specified, hydraulic pressure value still can not meet waterflooding requirement, then control device 9 controls soft opening device 7 and starts asynchronous motor supplied with variable frequency 11.After asynchronous motor supplied with variable frequency 11 normally runs, control device 9 carries out the rotational speed regulation of permagnetic synchronous motor 10 according to the hydraulic pressure value of water pump 12, to meet the needs of water injection pressure.
When the hydraulic pressure value coming from water pump 12 is more than or equal to setup pressure value, control device 9 carries out deceleration by inverter 5 pairs of permagnetic synchronous motors 10 and regulates.If when the rotating speed of permagnetic synchronous motor 10 reaches minimum, hydraulic pressure value still can not meet waterflooding requirement, then control device 9 controls asynchronous motor supplied with variable frequency 11 described in soft opening device 7 soft stop.After asynchronous motor supplied with variable frequency 11 stops, control device 9 carries out the rotational speed regulation of permagnetic synchronous motor 10 according to the hydraulic pressure value of water pump 12, to meet the needs of water injection pressure.
Oil-field flooding constant voltage automatic control system also comprises fairing 4, filter 6 and exports isolation and switching device 8.The alternating voltage that the three-phase alternating current electrical network 2 of outside exports is transformed into DC voltage by fairing 4, comes from the energy of three-phase alternating current electrical network 2 to inverter 5 transmission simultaneously.It is alternating current that fairing 4 is transmitted the DC voltage inversion come by inverter 5, and carries out filtering process by filter 6, then by exporting isolation and switching device 8 and be sent to permagnetic synchronous motor 10 or asynchronous motor supplied with variable frequency 11 using.Soft opening device 7 pairs of asynchronous motor supplied with variable frequencies 11 carry out soft opening or soft stop operation.
When the water pump 12 of permagnetic synchronous motor 10 or its correspondence breaks down, disconnect the connection between filter 6 and permagnetic synchronous motor 10, connect the path between filter 6 and asynchronous motor supplied with variable frequency 11, connection between the three-phase alternating current electrical network 2 of disconnecting external and soft opening device 7, controls by inverter 5 adjustment that asynchronous motor supplied with variable frequency 11 carries out water pump 12 water injection pressure.
By implementing oil-field flooding constant voltage automatic control system and method thereof that the specific embodiment of the invention describes, following technique effect can be reached:
(1) technical scheme that the specific embodiment of the invention describes significantly reduces labour intensity and the human cost of field worker by employing constant voltage automatic control mode, water injection rate regulates real-time good, overcomes prior art and can not regulate to water injection rate the technical problem causing actual oil-field flooding station all to there is metered 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, energy conservation 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 operating frequency adjustable, therefore reduce further self noise, and significantly improve operating efficiency;
(5) technical scheme that the specific embodiment of the invention describes adopts permagnetic synchronous motor and asynchronous motor supplied with variable frequency, 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 manual, 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 (12)
1. an oil-field flooding constant voltage automatic control system, it is characterized in that, comprising: input isolating switch (3), fairing (4), inverter (5), filter (6), soft opening device (7), output isolation and switching device (8), control device (9), permagnetic synchronous motor (10) and asynchronous motor supplied with variable frequency (11); The input of described input isolating switch (3) is connected with outside three-phase alternating current electrical network (2), the output of described input isolating switch (3) is connected with described fairing (4), soft opening device (7) respectively, described fairing (4) is connected with described inverter (5), and described inverter (5) is connected with the input of described filter (6); Described filter (6), soft opening device (7) are connected with described output isolation and switching device (8) respectively, the output of described output isolation and switching device (8) is connected with outside corresponding water pump (12) respectively by described permagnetic synchronous motor (10), asynchronous motor supplied with variable frequency (11), and described control device (9) controls described input isolating switch (3), inverter (5), soft opening device (7) and output isolation and switching device (8) respectively.
2. a kind of oil-field flooding constant voltage automatic control system according to claim 1, it is characterized in that: described fairing (4) adopts diode rectification mode, the alternating voltage that described three-phase alternating current electrical network (2) exports is transformed into DC voltage, comes from the energy of three-phase alternating current electrical network (2) simultaneously to described inverter (5) transmission; The DC voltage inversion that described fairing (4) transmission comes by described inverter (5) is alternating current, and carry out filtering process by described filter (6), then transfer to described permagnetic synchronous motor (10) or described asynchronous motor supplied with variable frequency (11) use by described output isolation and switching device (8); Described soft opening device (7) carries out soft opening or soft stop operation to described asynchronous motor supplied with variable frequency (11).
3. a kind of oil-field flooding constant voltage automatic control system according to claim 1 and 2, it is characterized in that: when the adjustment of water filling hydraulic pressure is carried out in oil field, described control device (9) reads the hydraulic pressure value coming from described water pump (12), by described hydraulic pressure value and setup pressure value are compared, control described inverter (5) and regulate described permagnetic synchronous motor (10), or control described soft opening device (7) adjustment asynchronous motor supplied with variable frequency (11).
4. a kind of oil-field flooding constant voltage automatic control system according to claim 3, it is characterized in that: when the hydraulic pressure value coming from described water pump (12) is less than setup pressure value, described control device (9) carries out acceleration by described inverter (5) to described permagnetic synchronous motor (10) and regulates; If when the rotating speed of described permagnetic synchronous motor (10) reaches specified, described hydraulic pressure value still can not meet waterflooding requirement, then described control device (9) controls described soft opening device (7) and starts described asynchronous motor supplied with variable frequency (11); After described asynchronous motor supplied with variable frequency (11) normally runs, described control device (9) carries out the rotational speed regulation of described permagnetic synchronous motor (10) according to the hydraulic pressure value of described water pump (12), to meet the needs of water injection pressure.
5. a kind of oil-field flooding constant voltage automatic control system according to claim 4, it is characterized in that: when the hydraulic pressure value coming from described water pump (12) is more than or equal to setup pressure value, described control device (9) carries out deceleration by described inverter (5) to described permagnetic synchronous motor (10) and regulates; If when the rotating speed of described permagnetic synchronous motor (10) reaches minimum, described hydraulic pressure value still can not meet waterflooding requirement, then described control device (9) controls asynchronous motor supplied with variable frequency (11) described in soft opening device (7) soft stop; After described asynchronous motor supplied with variable frequency (11) stops, described control device (9) carries out the rotational speed regulation of described permagnetic synchronous motor (10) according to the hydraulic pressure value of described water pump (12), to meet the needs of water injection pressure.
6. according to a kind of oil-field flooding constant voltage automatic control system in claim 1,2,4,5 described in arbitrary claim, it is characterized in that: described output isolation and switching device (8) comprises the first contactor (KM1) and the second contactor (KM2) further, described first contactor (KM1) is connected between described filter (6) and described permagnetic synchronous motor (10), and described second contactor (KM2) is connected between described filter (6) and described asynchronous motor supplied with variable frequency (11); When the water pump (12) of described permagnetic synchronous motor (10) or its correspondence breaks down, described first contactor (KM1) separating brake, described second contactor (KM2) is closed a floodgate, utilize described inverter (5) to control adjustment that described asynchronous motor supplied with variable frequency (11) carries out described water pump (12) water injection pressure, the 4th contactor (KM4) corresponding with described soft opening device (7) front end in described input isolating switch (3) is in gate-dividing state.
7. a kind of oil-field flooding constant voltage automatic control system according to claim 6, it is characterized in that: described inverter (5) drives described permagnetic synchronous motor (10) to run by vector control mode, described inverter (5) drives described asynchronous motor supplied with variable frequency (11) to run by voltage/frequency conversion control mode.
8. an oil-field flooding constant voltage autocontrol method, it is characterized in that, oil-field flooding constant voltage automatic control system comprises inverter (5), soft opening device (7), control device (9), permagnetic synchronous motor (10) and asynchronous motor supplied with variable frequency (11), said method comprising the steps of:
When the adjustment of water filling hydraulic pressure is carried out in oil field, described control device (9) reads the hydraulic pressure value coming from water pump (12), by described hydraulic pressure value and setup pressure value are compared, control described inverter (5) to regulate described permagnetic synchronous motor (10) or control described soft opening device (7) and regulate described asynchronous motor supplied with variable frequency (11), change the output pressure of described water pump (12), realize the automatic adjustment of water injection rate.
9. a kind of oil-field flooding constant voltage autocontrol method according to claim 8, it is characterized in that: when the hydraulic pressure value coming from described water pump (12) is less than setup pressure value, described control device (9) carries out acceleration by described inverter (5) to described permagnetic synchronous motor (10) and regulates; If when the rotating speed of described permagnetic synchronous motor (10) reaches specified, described hydraulic pressure value still can not meet waterflooding requirement, then described control device (9) controls described soft opening device (7) and starts described asynchronous motor supplied with variable frequency (11); After described asynchronous motor supplied with variable frequency (11) normally runs, described control device (9) carries out the rotational speed regulation of described permagnetic synchronous motor (10) according to the hydraulic pressure value of described water pump (12), to meet the needs of water injection pressure.
10. a kind of oil-field flooding constant voltage autocontrol method according to claim 9, it is characterized in that: when the hydraulic pressure value coming from described water pump (12) is more than or equal to setup pressure value, described control device (9) carries out deceleration by described inverter (5) to described permagnetic synchronous motor (10) and regulates; If when the rotating speed of described permagnetic synchronous motor (10) reaches minimum, described hydraulic pressure value still can not meet waterflooding requirement, then described control device (9) controls asynchronous motor supplied with variable frequency (11) described in soft opening device (7) soft stop; After described asynchronous motor supplied with variable frequency (11) stops, described control device (9) carries out the rotational speed regulation of described permagnetic synchronous motor (10) according to the hydraulic pressure value of described water pump (12), to meet the needs of water injection pressure.
A kind of oil-field flooding constant voltage autocontrol method 11. according to Claim 8, in 9,10 described in arbitrary claim, is characterized in that: described oil-field flooding constant voltage automatic control system also comprises fairing (4), filter (6) and exports isolation and switching device (8); The alternating voltage that the three-phase alternating current electrical network (2) of outside exports is transformed into DC voltage by described fairing (4), comes from the energy of three-phase alternating current electrical network (2) to described inverter (5) transmission simultaneously; The DC voltage inversion that described fairing (4) transmission comes by described inverter (5) is alternating current, and carry out filtering process by described filter (6), then be sent to described permagnetic synchronous motor (10) or described asynchronous motor supplied with variable frequency (11) use by described output isolation and switching device (8); Described soft opening device (7) carries out soft opening or soft stop operation to described asynchronous motor supplied with variable frequency (11).
12. a kind of oil-field flooding constant voltage autocontrol methods according to claim 11, it is characterized in that: when the water pump (12) of described permagnetic synchronous motor (10) or its correspondence breaks down, disconnect the connection between described filter (6) and described permagnetic synchronous motor (10), connect the path between described filter (6) and described asynchronous motor supplied with variable frequency (11), and the connection between the three-phase alternating current electrical network (2) of disconnecting external and described soft opening device (7), the adjustment that described asynchronous motor supplied with variable frequency (11) carries out described water pump (12) water injection pressure is controlled by described inverter (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410229956.9A CN105221123B (en) | 2014-05-28 | 2014-05-28 | Oil-field flooding constant pressure automatic control system and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410229956.9A CN105221123B (en) | 2014-05-28 | 2014-05-28 | Oil-field flooding constant pressure automatic control system and its method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105221123A true CN105221123A (en) | 2016-01-06 |
| CN105221123B CN105221123B (en) | 2018-08-03 |
Family
ID=54990347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410229956.9A Active CN105221123B (en) | 2014-05-28 | 2014-05-28 | Oil-field flooding constant pressure automatic control system and its method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105221123B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2239032A (en) * | 1989-12-15 | 1991-06-19 | Pony Ind Inc | Cleaning wells |
| CN201303697Y (en) * | 2008-10-23 | 2009-09-09 | 彭程 | Novel shoe brush |
| CN102465547A (en) * | 2010-11-09 | 2012-05-23 | 重庆成峰二次供水设备有限责任公司 | Control system of one-frequency one-pump constant pressure water supply equipment |
-
2014
- 2014-05-28 CN CN201410229956.9A patent/CN105221123B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2239032A (en) * | 1989-12-15 | 1991-06-19 | Pony Ind Inc | Cleaning wells |
| CN201303697Y (en) * | 2008-10-23 | 2009-09-09 | 彭程 | Novel shoe brush |
| CN102465547A (en) * | 2010-11-09 | 2012-05-23 | 重庆成峰二次供水设备有限责任公司 | Control system of one-frequency one-pump constant pressure water supply equipment |
Non-Patent Citations (1)
| Title |
|---|
| 刘利 等: "变频器--软启动器恒压供水系统", 《电动机软启动器实用技术》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105221123B (en) | 2018-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104682431B (en) | Self-starting method and self-starting system of energy storage converter | |
| CN105278352B (en) | Oil-field flooding automatic control system and its method | |
| CN102340270B (en) | Programmable logic controller (PLC)-and-frequency-converter-based energy saving control system and method for doubly-fed motor | |
| CN104539197A (en) | Soft start and voltage reduction power saving comprehensive control device and method for asynchronous motor | |
| CN109742980A (en) | The device and control method of threephase asynchronous start and stop, control and voltage-reducing and electricity-saving | |
| CN203340016U (en) | Energy-saving controller for three-phase alternating-current asynchronous motor | |
| CN203151409U (en) | High-voltage motor variable-load soft-starting and energy-saving integrated device | |
| CN201690400U (en) | Frequency-conversion soft-start hybrid power cabinet | |
| CN101860316A (en) | Self-adaptive load following control technical system | |
| CN105221123A (en) | Oil-field flooding constant voltage automatic control system and method thereof | |
| CN202334410U (en) | Frequency conversion control system | |
| CN206313697U (en) | A kind of switched reluctance machines hardware controller | |
| CN204947946U (en) | A kind of intelligent controlling system for beam-pumping unit adopting technology of Internet of things | |
| CN100384082C (en) | Method and apparatus for controlling AC induction motor energy-saving operation | |
| CN104038117B (en) | Three-phase electromagnetic slowdown type permanent magnet low-speed synchronous machine fast braking circuit | |
| CN204539040U (en) | A kind of variable-frequency motor automatic speed governing device | |
| CN204304795U (en) | The power frequency synchronous freewheeling control device of alternating-current chopper circuit | |
| CN103470520B (en) | Large power power electronic appliance power cabinet volume adjusting apparatus | |
| CN203645586U (en) | Integration system of oil well heating and intelligent control of clustered-well oil pumping units | |
| CN201038816Y (en) | Pumping unit dual-machine towed feed type energy-saving device | |
| CN103944458A (en) | Dynamic braking method and device | |
| CN203504376U (en) | Low rotating speed multispeed three-phase asynchronous motor | |
| CN204532785U (en) | Distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps | |
| CN204231253U (en) | A kind of electricity-saving appliance for threephase asynchronous machine | |
| CN103560631A (en) | Low-rotation speed multiple-speed three-phase asynchronous motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |