CN117792216A - Star-triangle energy-saving control method for oil pumping unit - Google Patents
Star-triangle energy-saving control method for oil pumping unit Download PDFInfo
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- CN117792216A CN117792216A CN202410019880.0A CN202410019880A CN117792216A CN 117792216 A CN117792216 A CN 117792216A CN 202410019880 A CN202410019880 A CN 202410019880A CN 117792216 A CN117792216 A CN 117792216A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005086 pumping Methods 0.000 title claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The invention discloses a star-delta energy-saving control method of a pumping unit, which relates to the technical field of energy-saving operation of a motor, and comprises the steps of firstly setting a plurality of wiring modes in target equipment, then collecting and analyzing operation parameters of the target equipment, wherein the operation parameters refer to operation voltage and operation current of the target equipment, collecting the operation parameters of the target equipment at intervals of T1 time by taking starting time as initial time, calculating the operation parameters to obtain the current active power of the target equipment, then comparing the current active power with corresponding rated power, switching the operation modes of the target equipment according to comparison results, and monitoring the actual load state of a circuit by setting a multi-circuit operation mode in the motor, so that the operation mode of the motor is selected, and the energy-saving operation of the pumping unit is realized under the condition that the normal operation of the motor is ensured.
Description
Technical Field
The invention belongs to the technical field of motor energy-saving operation, and particularly relates to a star-delta energy-saving control method of an oil pumping unit.
Background
The pumping unit is a machine equipment for exploiting petroleum, commonly called as "kowtow machine", and is the most main lifting equipment in the pumping system with a rod, and can be classified into a beam pumping unit and a beam-free pumping unit according to whether a beam exists.
The invention of patent publication number CN104320040A discloses a triangle start star-shaped operation energy-saving control cabinet of an oil pumping unit and a control method thereof, wherein the triangle start star-shaped operation energy-saving control cabinet comprises a main loop and a control loop; the control loop comprises two buttons, three indicator lamps, three safety switches, an intermediate relay KM4 and a time relay SJ; one incoming line L11 of the 380V three-phase power supply passes through a safety switch FU3 and then is a node A, the other incoming line L13 of the 380V three-phase power supply passes through a safety switch FU4 and then is a node B, and a plurality of branches are connected between the node A and the node B; the control method of the control cabinet comprises the following steps: switching on a power supply; starting a triangle; maintaining the triangle after starting; star-shaped operation; the automatic switching between star-shaped and triangle-shaped operation can be realized according to specific conditions in operation, and the maximum energy saving is achieved through optimal control. The control cabinet realizes the triangle starting and then star-shaped operation of the oil pumping unit, and compares the triangle operation with the traditional triangle operation; the active power saving rate is 42.36%, the reactive power saving rate is 74.14%, and the comprehensive power saving rate is 50.26%.
The motor wiring connection in the normal-use industrial frequency range hood only adopts a single mode to operate, and because the current generated during the star-shaped operation mode is smaller, the common oil pumping opportunity adopts the star-shaped operation mode to save energy, but because the star-shaped operation mode is only suitable for an oil well with lower operation power, when the operation power is increased, the motor is overloaded, thereby causing circuit faults.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art; therefore, the invention provides a star-delta energy-saving control method for the oil pumping unit, which is used for solving the technical problems.
To achieve the above object, according to an embodiment of the first aspect of the present invention, a star-delta energy-saving control method for a pumping unit is provided, which specifically includes the following steps:
step one: firstly, arranging a plurality of wiring modes in target equipment, wherein the plurality of wiring modes comprise a star wiring mode and a triangle wiring mode, and the target equipment refers to an oil pumping unit using the system;
step two: collecting and analyzing the operation parameters of the target equipment, wherein the operation parameters refer to the operation voltage and the operation current of the target equipment, the starting time is taken as the initial time, the operation parameters are collected every T1, and the active power P of the target equipment at the moment is obtained by calculating the operation parameters;
step three: and then comparing the active power P of the target equipment with the corresponding rated power Pe according to the active power P of the target equipment, and switching the operation mode of the target equipment according to the comparison result.
As a further scheme of the invention, the calculation method of the active power P comprises the following steps:
s211: taking starting time as initial time, and collecting operation parameters of the vehicle at intervals of time T1;
s212: then calculating the acquired parameters by adopting a formulaObtaining active power P of the target device, wherein U represents voltage of the target device when the target device works, I represents current of the target device when the target device works,/and P>Indicating power factorAnd (5) a seed.
As a further scheme of the invention, the specific method for switching the operation mode of the target equipment comprises the following steps:
comparing the active power P with the rated power Pe of the motor, when P < "In this case, the device will switch directly to star-connected mode operation, when +.>At this time, the active power P of the next time period is continuously monitored again when there are m consecutive active powers P +.>At this time, the operation is continued by selecting the star connection mode when P > + ->At this time, the operation mode of the target device is switched to the delta connection mode, wherein +.>、/>N is a preset coefficient.
As a further scheme of the invention, the target equipment is provided with 6-core cables, wherein 3-core cables are in a star connection mode, the remaining three-core cables are connected in a triangle mode, and two wiring modes are mutually independent.
As a further scheme of the invention, the target equipment is started in a triangle connection mode by default when being started for the first time, is switched to a star connection mode for operation after being started, then monitors the operation parameters of the target equipment, switches the circuit connection mode according to actual operation data, and then selects according to the last operation mode when the target equipment is repeatedly started.
As a further aspect of the present invention, selecting the operating power in the target device according to the operating power of the motor, where the operating power is set to a plurality of operating levels, and operates at the rated power by default when first started.
The invention further provides a power grid operation monitoring system for monitoring the operation state of the power grid, and when the power grid operation state has the power-shaking state, the emergency power supply equipment is adopted to supply power to the target equipment.
As a further scheme of the invention, the specific operation method of the power grid operation monitoring system comprises the following steps:
firstly, detecting the working parameters of a power grid, wherein the working parameters of the power grid refer to real-time voltage and current when the power grid runs, and when the working parameters of the power grid change instantaneously, namely the voltage value in the power grid drops instantaneously within a short time t1 to exceed a preset value X1, judging that the power grid has a power-shaking state at the moment;
when the power grid is in a power-off state, the power supply state of the target equipment is a power-off state, and the emergency power supply equipment releases current at the moment according to the working principle of the emergency power supply equipment so as to supply power to the target equipment in a short time;
when the power grid operation monitoring system detects that the power grid is in a normal state, the circuit is switched to a power grid power supply mode, the target equipment continuously operates in the process, meanwhile, the power grid charges the emergency power supply equipment until the emergency power supply equipment reaches a full capacity state, the emergency power supply equipment is in an open circuit state, and the power grid only supplies power to the target equipment.
Compared with the prior art, the invention has the beneficial effects that: the multi-circuit working mode is set in the motor, the actual load state of the circuit is monitored, the operation mode of the motor is selected, the energy-saving operation of the oil pumping unit is realized under the condition that the normal operation of the motor is ensured, meanwhile, the super capacitor is used for carrying out emergency power supply on the interference electricity phenomenon in the circuit, the circuit design of the circuit in target equipment is simplified, and the power consumption of the circuit is reduced.
Drawings
FIG. 1 is a schematic diagram of a method framework of the present invention;
fig. 2 is a schematic diagram of a flow frame of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, the present application provides a star-delta energy-saving control method for an oil pumping unit, including:
example 1
Step one: firstly, arranging a plurality of wiring modes in target equipment, wherein the target equipment refers to an oil pumping unit aimed by the system, the plurality of wiring modes comprise a star wiring mode and a triangle wiring mode, in the embodiment, the cable of the motor is arranged into a 6-core cable, wherein the 3-core cable is in a star connection mode, the rest three-core cables are connected in a triangle mode, and the two wiring modes are mutually independent, so that the free switching between the star connection mode and the triangle connection mode is realized;
step two: then, the operation parameters of the target equipment are collected and analyzed, and the specific analysis process is as follows:
s21: when the target equipment is started, monitoring the started operation parameters, wherein the operation parameters refer to the electrical parameters of the target equipment, and specifically comprise operation voltage and operation current, and the specific method for monitoring the operation parameters of the target equipment comprises the following steps:
s211: taking the starting time as the initial time, and collecting the operation parameters of the vehicle at intervals of time T1, wherein the time T1 is a preset value, and the value of T1 is 5min in the embodiment;
s212: then calculating the acquired parameters by adopting a formulaObtaining active power P of the target device, wherein U represents voltage of the target device when the target device works, I represents current of the target device when the target device works,/and P>A specific power factor value of the power factor is determined according to the phase in the circuit;
step three: according to the active power P of the target equipment, comparing the active power P with the rated power Pe of the target equipment, and switching the operation mode according to the comparison result, wherein the specific switching mode is as follows:
comparing the active power P with the rated power Pe of the motor, when P < "In this case, the device will switch directly to star-connected mode operation, when +.>At this time, the active power P in the next time period is continuously monitored, when there are m consecutive active powers P +.>At this time, the operation is continued by selecting the star connection mode when P > + ->At this time, the operation mode of the target device is switched to the delta connection mode, wherein +.>、/>N is a predetermined coefficient, in this embodiment +.>The value is 32 percent, and the patients are in the middle of the skin>The value is 35%, and the value of n is 2;
the method includes the steps that when target equipment is started for the first time, a triangular connection mode is selected as a default mode for starting, the operation is switched to a star connection mode for operation after the starting, then operation parameters of the target equipment are monitored, circuit connection modes are switched according to actual operation data, and the target equipment is selected according to the last operation mode when the target equipment is repeatedly started;
example two
On the basis of the first embodiment, the method is further used for selecting the operation power in the target device according to the operation power of the motor, wherein the operation power is set to be a plurality of operation grades, and the operation is performed at rated power by default when the target device is started for the first time;
example III
On the basis of the first embodiment, a power grid operation monitoring system is further provided, the power grid operation monitoring system is used for monitoring the operation state of the power grid, emergency power supply equipment is arranged in the power grid operation monitoring system, in the embodiment, the emergency power supply equipment is arranged as a super capacitor, and the specific monitoring mode is as follows:
firstly, detecting working parameters of a power grid, wherein the working parameters of the power grid refer to real-time voltage and current when the power grid runs, when the working parameters of the power grid instantaneously change, namely, the voltage value in the power grid instantaneously drops in a short time t1 to exceed a preset value X1, namely, the power grid is judged to have an electricity-shaking state at the moment, wherein t1 and X1 are preset values respectively, and the specific values are valued by related professionals;
when the power grid is in a power-off state, the power supply state of the target equipment is a power-off state, and according to the working principle of the emergency power supply equipment, the emergency power supply equipment releases current to supply power to the target equipment in a short time, so that the loss of the target equipment caused by power-off is reduced;
when the power grid operation monitoring system detects that the power grid is in a normal state, the circuit is switched to a power grid power supply mode, the target equipment continuously operates in the process, the shutdown of the target equipment caused by power interference is reduced, meanwhile, the power grid also charges the emergency power supply equipment until the emergency power supply equipment reaches a full capacity state, the emergency power supply equipment is in an open circuit state, and the power grid only supplies power to the target equipment.
Example IV
The method is used for fusing and implementing the first embodiment, the second embodiment and the third embodiment.
The partial data in the formula are all obtained by removing dimension and taking the numerical value for calculation, and the formula is a formula closest to the real situation obtained by simulating a large amount of collected data through software; the preset parameters and the preset threshold values in the formula are set by those skilled in the art according to actual conditions or are obtained through mass data simulation.
The working principle of the invention is as follows: firstly, arranging a plurality of wiring modes in target equipment, wherein the plurality of wiring modes comprise a star wiring mode and a triangle wiring mode, the target equipment refers to an oil pumping unit using the system, then, collecting and analyzing operation parameters of the target equipment, wherein the operation parameters refer to operation voltage and operation current of the target equipment, the starting time is taken as initial time, the operation parameters are collected every T1 time, the active power P of the target equipment at the moment is obtained by calculating the operation parameters, then, the active power P is compared with corresponding rated power Pe, and the operation modes of the target equipment are switched according to the comparison result.
The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (8)
1. The star-delta energy-saving control method for the oil pumping unit is characterized by comprising the following steps of:
step one: firstly, arranging a plurality of wiring modes in target equipment, wherein the plurality of wiring modes comprise a star wiring mode and a triangle wiring mode, and the target equipment refers to an oil pumping unit using the system;
step two: collecting and analyzing the operation parameters of the target equipment, wherein the operation parameters refer to the operation voltage and the operation current of the target equipment, the starting time is taken as the initial time, the operation parameters are collected every T1 time, and the active power P of the target equipment at the moment is obtained by calculating the operation parameters;
step three: and then comparing the active power P of the target equipment with the corresponding rated power Pe according to the active power P of the target equipment, and switching the operation mode of the target equipment according to the comparison result.
2. The star-delta energy-saving control method of the oil pumping unit according to claim 1, wherein the calculation method of the active power P is as follows:
s211: taking starting time as initial time, and collecting operation parameters of the vehicle at intervals of time T1;
s212: then calculating the acquired parameters by adopting a formulaObtaining active power P of the target device, wherein U represents voltage of the target device when the target device works, I represents current of the target device when the target device works,/and P>Representing the power factor.
3. The star-delta energy-saving control method for the oil pumping unit according to claim 1, wherein the specific method for switching the operation mode of the target equipment is as follows:
comparing the active power P with the rated power Pe of the motor, when P < "In this case, the device will switch directly to star-connected mode operation, when +.>At this time, the active power P of the next time period is continuously monitored again when there are m consecutive active powers P +.>At this time, the star connection mode is selected continuously, when +.>At this time, the operation mode of the target device is switched to the delta connection mode, wherein +.>、/>N is a preset coefficient.
4. The star-delta energy-saving control method for the oil pumping unit according to claim 1, wherein 6-core cables are arranged in the target equipment, wherein 3-core cables are in a star connection mode, the remaining three-core cables are connected in a triangle mode, and two wiring modes are independent from each other.
5. The star-delta energy-saving control method for the oil pumping unit according to claim 1, wherein the target equipment is started in a delta connection mode by default when the target equipment is started for the first time, is switched to be operated in a star connection mode after the target equipment is started, then monitors operation parameters of the target equipment, switches circuit connection modes according to actual operation data, and is selected according to a last operation mode when the target equipment is repeatedly started.
6. The star delta energy saving control method of a pumping unit according to claim 1, further comprising selecting an operating power in the target device according to the operating power of the motor, wherein the operating power is set to a plurality of operating levels, and operates at a rated power by default when first started.
7. The star delta energy saving control method of a pumping unit according to claim 1, further comprising a grid operation monitoring system for monitoring an operation state of a grid, wherein when a power grid operation state occurs, an emergency power supply device is used to supply power to a target device.
8. The star-delta energy-saving control method for the oil pumping unit according to claim 7, wherein the specific operation method of the power grid operation monitoring system is as follows:
firstly, detecting the working parameters of a power grid, wherein the working parameters of the power grid refer to real-time voltage and current when the power grid runs, and when the working parameters of the power grid change instantaneously, namely the voltage value in the power grid drops instantaneously within a short time t1 to exceed a preset value X1, judging that the power grid has a power-shaking state at the moment;
when the power grid is in a power-off state, the power supply state of the target equipment is a power-off state, and the emergency power supply equipment releases current at the moment according to the working principle of the emergency power supply equipment so as to supply power to the target equipment in a short time;
when the power grid operation monitoring system detects that the power grid is in a normal state, the circuit is switched to a power grid power supply mode, the target equipment continuously operates in the process, meanwhile, the power grid charges the emergency power supply equipment until the emergency power supply equipment reaches a full capacity state, the emergency power supply equipment is in an open circuit state, and the power grid only supplies power to the target equipment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410019880.0A CN117792216A (en) | 2024-01-06 | 2024-01-06 | Star-triangle energy-saving control method for oil pumping unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410019880.0A CN117792216A (en) | 2024-01-06 | 2024-01-06 | Star-triangle energy-saving control method for oil pumping unit |
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| RU2796100C1 (en) * | 2022-07-06 | 2023-05-17 | Федеральное государственное бюджетное образовательное учреждение высшего образования Иркутский государственный университет путей сообщения (ФГБОУ ВО ИрГУПС) | Asynchronous motor control method |
| CN117082829A (en) * | 2023-08-28 | 2023-11-17 | 东营市沃格艾迪石油技术有限公司 | Automatic star-angle conversion energy-saving control device for oil pumping unit |
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2024
- 2024-01-06 CN CN202410019880.0A patent/CN117792216A/en active Pending
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| US4425539A (en) * | 1980-03-13 | 1984-01-10 | Borg-Warner Corporation | Control system for AC induction motor |
| US4499986A (en) * | 1981-02-27 | 1985-02-19 | Hitachi, Ltd. | Control apparatus for passenger conveyor |
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