CN210483676U - Control protection system for on-load starting of high-pressure water injection pump - Google Patents
Control protection system for on-load starting of high-pressure water injection pump Download PDFInfo
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- CN210483676U CN210483676U CN201920871567.4U CN201920871567U CN210483676U CN 210483676 U CN210483676 U CN 210483676U CN 201920871567 U CN201920871567 U CN 201920871567U CN 210483676 U CN210483676 U CN 210483676U
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Abstract
The utility model belongs to the technical field of the oil field water injection, concretely relates to control protection system that high-pressure water injection pump area carried and starts. The utility model discloses an input power supply, strong cold wind tail fan, vector control output unit, high pressure water injection pump motor, connect vector control output unit, voltage sampling unit, control and protection unit, the organic setting of pressure fuzzy controller and parameter setting unit, the collection and the transport of passing signal, modify control parameter, control water injection pump operating frequency and output voltage open and stop four steps with control strong cold wind tail fan, water injection pump start-up process has been simplified, improve water injection system withstand voltage fluctuation ability, guarantee water injection pressure accurate control, the parameter needs manual adjustment mode when changing control mode switching, solve the too high problem of temperature rise when high pressure water injection pump motor low frequency operation simultaneously, realize water injection system even running, energy saving and consumption reduction's purpose.
Description
Technical Field
The invention belongs to the technical field of oilfield water injection, and particularly relates to a control and protection system for on-load starting of a high-pressure water injection pump.
Background
In the development and production process of oil fields, the oil reservoir pressure is supplemented and maintained by a method of manually injecting water into an oil reservoir so as to improve the oil extraction efficiency, so that a water injection system is required to maintain stable water injection quantity and water injection pressure, and a water injection control system is used as a core part of the water injection system and plays a very important role in operation stability. At present, most of water injection pumps are controlled by power frequency starting, stopping and running, in order to prevent a motor from having large current impact when being started and avoid damaging a water injection mechanical system and a water delivery pipeline system, a water injection loop needs to be firstly decompressed, then the water injection pumps are started, and finally the water injection pressure is adjusted to a target value through a manual regulation backflow valve, so that the problems of energy waste, low water injection efficiency, high manual operation danger coefficient, inaccurate manual pressure regulation and the like exist in the method; when the voltage of a power grid is unstable, the water injection pump is forced to stop running or the motor is kept running continuously, the water injection efficiency is greatly influenced when the water injection pump is forced to stop running, if the motor is kept running continuously, the safe running is influenced, and the motor is burnt out seriously.
For a system for controlling the start, stop and operation of a water injection pump by power frequency, besides the problems, the problems of no closed-loop control of water injection pressure, low voltage fluctuation resistance and the like exist, and aiming at the problems, the control and protection functions of a high-pressure water injection pump in an oil field need to be perfected.
Disclosure of Invention
The invention provides a control and protection system for on-load starting of a high-pressure water injection pump, and aims to provide a control and protection system for the high-pressure water injection pump, which has high closed-loop control water injection pressure and high voltage fluctuation resistance; the invention also aims to provide a control and protection system of the high-pressure water injection pump, which can run stably, save energy and reduce consumption; the invention also aims to provide a control and protection system of the high-pressure water injection pump, which can accurately control the water injection pressure.
In order to achieve the purpose, the invention adopts the technical scheme that:
a control and protection system for on-load starting of a high-pressure water injection pump comprises
A high-pressure water injection pump motor;
the strong cooling air tail fan is arranged outside the high-pressure water injection pump motor and is opposite to the high-pressure water injection pump motor;
the vector control output unit is connected with the high-pressure water injection pump motor 6 and used for controlling the start and stop of a strong cold air tail fan of the high-pressure water injection pump motor;
the voltage sampling unit is electrically connected with the vector control output unit and is used for collecting and transmitting the input voltage of the vector control output unit;
the control and protection unit is electrically connected with the vector control output unit and the voltage sampling unit and is used for receiving the data collected by the voltage sampling unit and controlling the direct-current voltage value in the vector control output unit;
the pressure fuzzy controller is in electrical signal connection with the control and protection unit and is used for collecting signals of a water injection pressure sensor of an external water injection pump and sending control signals to the control and protection unit;
the parameter setting unit is electrically connected with the control and protection unit and is used for automatically modifying the control parameters in the control and protection unit;
and the input power supply is used for providing power sources for the vector control output unit, the voltage sampling unit, the control and protection unit, the pressure fuzzy controller, the parameter setting unit and the high-pressure water injection pump motor.
The voltage sampling unit adopts a multifunctional power monitor with the model number of DMP-C530.
The input power supply is 380V.
The model of the pressure fuzzy controller is FLC180V 10.
The model of the tail fan of the strong cooling fan is QLFJ 100-4.
The voltage sampling unit adopts a multifunctional power monitor with the model number of DMP-C530.
Has the advantages that:
the invention has the following beneficial effects:
1. the on-load starting process avoids the complicated operation flow of starting and stopping the water injection motor and the water injection valve group, realizes zero backflow of the water injection station, reduces the damage of the water injection valve group caused by frequent opening and closing of parts such as a backflow valve and the like, and prolongs the service life of equipment.
2. The invention adopts vector control to the high-pressure water injection pump motor, solves the problem of insufficient output torque when the squirrel-cage three-phase asynchronous motor operates at low frequency in the prior art, reduces current impact during starting and ensures the reliability of loaded starting of the water injection pump.
3. The modular arrangement of the invention can be combined with a remote monitoring platform to realize the unattended state of the water injection station, greatly reduce the labor intensity of field maintenance personnel and completely avoid potential safety hazards caused by high voltage.
4. The fuzzy controller can calculate the proper frequency increasing and reducing frequency of the motor to control the outlet pressure of the water injection pump through the fuzzy control knowledge base according to the target set value of the water injection pressure, so that the accurate control of the water injection pressure is realized. And when the water injection pressure is too low or too high, the operation of the water injection pump is stopped.
5. The voltage sampling unit has the functions of voltage sampling, stall prevention and under-voltage protection, and can control the output voltage to change within a certain range when the voltage of a power grid fluctuates, so that the motor is prevented from being burnt due to overhigh voltage.
6. The control and protection unit of the invention realizes automatic setting of the operation parameters.
7. The high-pressure water injection pump motor configuration is characterized in that the coaxial tail fan and the external strong cold air tail fan are arranged inside the high-pressure water injection pump motor configuration, and when the water injection pump runs at a low frequency, the coaxial tail fan and the external strong cold air tail fan of the motor run simultaneously to take away heat generated by the motor; when the water injection pump operates at high frequency, the coaxial tail fan operates, the external strong cold air tail fan stops, the temperature rise during the low-frequency operation of the motor is ensured within a reasonable range, and the effects of energy conservation and consumption reduction are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of the present invention;
fig. 2 is a flow chart of the present invention.
In the figure, 1-voltage sampling unit; 2-a pressure fuzzy controller; 3-a parameter setting unit; 4-a control and protection unit; 5-a vector control output unit; 6-high pressure water injection pump motor; 7-input power supply.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the control and protection system for the on-load starting of the high-pressure water injection pump shown in figure 1 comprises
A high-pressure water injection pump motor 6;
the strong cooling air tail fan is arranged outside the high-pressure water injection pump motor 6 and is opposite to the high-pressure water injection pump motor 6;
the vector control output unit 5 is connected with the high-pressure water injection pump motor 6 and is used for controlling the start and stop of a strong cold air tail fan of the high-pressure water injection pump motor 6;
the voltage sampling unit 1 is electrically connected with the vector control output unit 5 and is used for collecting and transmitting the input voltage of the vector control output unit 5;
the control and protection unit 4 is in electric signal connection with the vector control output unit 5 and the voltage sampling unit 1 and is used for receiving data collected by the voltage sampling unit 1 and controlling a direct-current voltage value in the vector control output unit 5;
the pressure fuzzy controller 2 is in electrical signal connection with the control and protection unit 4 and is used for collecting signals of a water injection pressure sensor of an external water injection pump and sending control signals to the control and protection unit 4;
the parameter setting unit 3 is electrically connected with the control and protection unit 4 and is used for automatically modifying the control parameters in the control and protection unit 4;
and the input power supply 7 is used for providing power sources for the vector control output unit 5, the voltage sampling unit 1, the control and protection unit 4, the pressure fuzzy controller 2, the parameter setting unit 3 and the high-pressure water injection pump motor 6.
The voltage sampling unit is preferably a multifunctional power monitor with the model number of DMP-C530.
Preferably, the input power 7 is 380V.
Preferably, the pressure fuzzy controller is in the model FLC180V 10.
Preferably, the model of the tail fan of the strong cooling fan is QLFJ 100-4.
Preferably, the voltage sampling unit adopts a multifunctional power monitor with the model number being DMP-C530.
In practical use, the voltage sampling unit 1 collects input voltage of the vector control output unit 5, and transmits the input voltage to the control and protection unit 4 through serial port communication, so as to control the voltage value of the DCBUS in the vector control output unit 5, thereby limiting the output voltage of the vector control output unit 5. The pressure fuzzy controller 2 collects signals of a water injection pressure sensor of the water injection pump in the prior art, calculates the frequency increasing amount or the frequency decreasing amount of a motor of the high-pressure water injection pump according to a fuzzy control knowledge base in the prior art, and sends the control signals to the control and protection unit 4. The parameter setting unit 3 automatically modifies the control parameters in the control and protection unit 4 according to the mode selection switch state. The control and protection unit 4 controls the operation frequency and the output voltage of the water injection pump through the vector control output unit 5. The control and protection unit 4 controls the start and stop of the tail fan 6 of the external strong cooling fan according to the output frequency of the vector control output unit 5.
The strong cold air tail fan outside the high-pressure water injection pump motor 6 enables the cooling effect of the high-pressure water injection pump motor 6 to be better, and can better guarantee the normal operation of the high-pressure water injection pump motor, the strong cold air tail fan with the model number of QLFJ100-4 in the prior art is adopted in the embodiment, and the cost is lower. The power supply 7 is 380V also to ensure proper operation of the invention.
In this embodiment, the voltage sampling unit, the parameter setting unit, the control and protection unit, the vector control output unit, and the external strong cooling fan tail fan are all devices in the prior art, and the parameter setting unit adopts a module with a model of DVP16SP, a control and protection unit with a model of DVP20SX211R, and a vector control output unit with a model of CPC2200C 43A.
Example two:
the use method of the control protection system for the on-load starting of the high-pressure water injection pump as shown in figure 2 comprises the following steps
The method comprises the following steps: signal acquisition and transmission
The voltage sampling unit 1 collects the input voltage of the vector control output unit 5 and transmits the input voltage to the control and protection unit 4 through serial port communication;
the pressure fuzzy controller 2 collects signals of an injection pressure sensor of an external water injection pump, calculates the frequency increasing amount or the frequency decreasing amount of a motor, and sends signals of the frequency increasing amount or the frequency decreasing amount to the control and protection unit 4;
step two: modifying control parameters
The parameter setting unit 3 automatically modifies the control parameters in the control and protection unit 4 according to the state of the mode selection switch;
step three: controlling water injection pump operating frequency and output voltage
The control and protection unit 4 transmits the control signal to the vector control output unit 5 to control the operation frequency and the output voltage of the water injection pump;
step four: control strong cold wind tail fan opens and stops
And controlling the starting and stopping of the tail fan of the external strong cooling wind turbine by controlling the output frequency of the vector control output unit 5 in the fourth step.
In actual use, the invention simplifies the operation process, realizes zero backflow of the water injection station, reduces the damage of the water injection valve group caused by frequently opening and closing parts such as a backflow valve and the like and prolongs the service life of equipment by four steps of signal acquisition and transmission, control parameter modification, control of the operation frequency and the output voltage of the water injection pump and control of the start and stop of the strong cold air tail fan.
In conclusion, the fuzzy controller is arranged, and the fuzzy controller calculates the appropriate frequency-increasing frequency of the motor of the high-pressure water injection pump to control the outlet pressure of the water injection pump according to the target set value of the water injection pressure through the fuzzy control knowledge base in the prior art, so that the accurate control of the water injection pressure is realized. And when the water injection pressure is too low or too high, the operation of the water injection pump is stopped. According to the invention, by configuring the voltage sampling unit 1, when the voltage of the power grid fluctuates, the output voltage can be controlled to change within a certain range, and the high-pressure water injection pump motor is prevented from being burnt due to overhigh voltage. The parameters of the invention can be automatically set according to the control mode. An external strong cooling fan tail fan is arranged outside the high-pressure water injection pump motor, and when the water injection pump runs at a low frequency, the coaxial tail fan in the high-pressure water injection pump motor and the external strong cooling fan tail fan run simultaneously; when the water injection pump operates at high frequency, the coaxial tail fan operates, the tail fan of the external strong cooling fan stops, and the temperature rise of the high-pressure water injection pump motor during low-frequency operation is ensured within a reasonable range and plays a role in energy conservation and consumption reduction. The invention can save electricity by 20%. The invention simplifies the starting procedure of the water injection pump, improves the voltage fluctuation resistance of the water injection system, ensures the accurate control of water injection pressure, changes the mode that parameters need to be manually adjusted when the control mode is switched, simultaneously solves the problem of overhigh temperature rise when the motor of the high-pressure water injection pump runs at low frequency, and realizes the purposes of stable operation of the water injection system, energy conservation and consumption reduction. The invention changes the output electric curve of the traditional squirrel-cage three-phase asynchronous motor, increases the output torque of the motor, and can meet the function of outputting high load in large torque of the motor, namely the variable-frequency loaded starting of the high-pressure water injection pump; the temperature change of the motor is controlled by the strong cold air tail fan outside the motor, so that the motor is protected to normally run under low frequency, and a motor control and protection system of the high-pressure water injection pump is achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Technical solutions between various embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention. The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (6)
1. The utility model provides a control protection system that high pressure water injection pump loaded and starts which characterized in that: comprises that
A high-pressure water injection pump motor (6);
the strong cooling air tail fan is arranged outside the high-pressure water injection pump motor (6) and is opposite to the high-pressure water injection pump motor (6);
the vector control output unit (5) is connected with the high-pressure water injection pump motor (6) and is used for controlling the start and stop of a strong cold air tail fan of the high-pressure water injection pump motor (6);
the voltage sampling unit (1) is in electric signal connection with the vector control output unit (5) and is used for collecting and transmitting the input voltage of the vector control output unit (5);
the control and protection unit (4) is electrically connected with the vector control output unit (5) and the voltage sampling unit (1) and is used for receiving the data collected by the voltage sampling unit (1) and controlling the direct-current voltage value in the vector control output unit (5);
the pressure fuzzy controller (2) is in electric signal connection with the control and protection unit (4) and is used for collecting signals of a water injection pressure sensor of an external water injection pump and sending control signals to the control and protection unit (4);
the parameter setting unit (3) is electrically connected with the control and protection unit (4) and is used for automatically modifying the control parameters in the control and protection unit (4);
the device comprises an input power supply (7), wherein the input power supply (7) is used for providing power sources for a vector control output unit (5), a voltage sampling unit (1), a control and protection unit (4), a pressure fuzzy controller (2), a parameter setting unit (3) and a high-pressure water injection pump motor (6).
2. The control and protection system for the on-load starting of the high-pressure water injection pump according to claim 1, characterized in that: the voltage sampling unit adopts a multifunctional power monitor with the model number of DMP-C530.
3. The control and protection system for the on-load starting of the high-pressure water injection pump according to claim 1, characterized in that: the input power supply (7) is 380V.
4. The control and protection system for the on-load starting of the high-pressure water injection pump according to claim 1, characterized in that: the model of the pressure fuzzy controller is FLC180V 10.
5. The control and protection system for the on-load starting of the high-pressure water injection pump according to claim 1, characterized in that: the model of the tail fan of the strong cooling fan is QLFJ 100-4.
6. The control and protection system for the on-load starting of the high-pressure water injection pump according to claim 1, characterized in that: the voltage sampling unit adopts a multifunctional power monitor with the model number of DMP-C530.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920871567.4U CN210483676U (en) | 2019-06-11 | 2019-06-11 | Control protection system for on-load starting of high-pressure water injection pump |
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| CN201920871567.4U CN210483676U (en) | 2019-06-11 | 2019-06-11 | Control protection system for on-load starting of high-pressure water injection pump |
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| CN210483676U true CN210483676U (en) | 2020-05-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331967A (en) * | 2019-06-11 | 2019-10-15 | 中国石油天然气股份有限公司 | A kind of high pressure water-injection pump band carries the Control protection system and method for starting |
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- 2019-06-11 CN CN201920871567.4U patent/CN210483676U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331967A (en) * | 2019-06-11 | 2019-10-15 | 中国石油天然气股份有限公司 | A kind of high pressure water-injection pump band carries the Control protection system and method for starting |
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