CN101174813A - Energy-saving control method of oil pumping machine - Google Patents
Energy-saving control method of oil pumping machine Download PDFInfo
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- CN101174813A CN101174813A CNA2007101134215A CN200710113421A CN101174813A CN 101174813 A CN101174813 A CN 101174813A CN A2007101134215 A CNA2007101134215 A CN A2007101134215A CN 200710113421 A CN200710113421 A CN 200710113421A CN 101174813 A CN101174813 A CN 101174813A
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Abstract
The present invention provides the energy conservation method of a pumping unit. According to the method, a frequency converter and an electric power measurement controller are arranged at the output end of the power supply switch circuit of a motor, a motor speed measurement controller is arranged between the motor and the power supply switch circuit of the motor to automatic track and control an intermitting power supply. The control mode is as follows: {1} when the counter balance of the pumping unit moves between C and D, the equivalent gravities at two sides of a beam equal are equivalent, the positive work of the motor is almost zero, then the electric power measurement controller controls the frequency converter to shut off the power supply of the motor and a pumping rod rises rapidly; {2} when the counter balance moves between A and B or near A under the inertia effect, the inertia consumption caused by gravitational potential energy becomes none gradually, the rotating speed of the motor slows down to the set speed, the speed measurement controller controls the converter to supply power to the motor again which drives the counter balance to re-rise to perform the next work cycle.
Description
1, technical field
The present invention relates to a kind of in the petroleum industry oil producing operation widely used oil pumper threephase asynchronous control system, especially it can (motor be done positive work or negative work, the equilibrium condition of counterweight was regulated motor speed in real time automatically when oil well pump moved up and down according to the running status of oil pumper, utilize the equipment inertia energy to greatest extent, reduction power consumption, increase jig frequency improve adopts liquid measure).
2, background technology
At present, known oil pumper (threephase asynchronous) electric control system is modes such as employing is direct, step-down, soft start, frequency converter, mainly solves the starting and the protection problem of motor.In view of its in a cycle period (about 6～20 second) of structure decision of beam pumping unit, oil well pump moves up and down once, and the weight of its oil well pump and load is mainly come the balance (see figure 1) by the balancing weight on the oil pumping unit reduction gearbox crank.Because the load of oil well pump constantly changes with the influence of down-hole liquid measure, viscosity, discharge pressure, ambient temperature etc., and the variation of balancing weight equivalence arm of force when doing circumferential running with crank, cause balancing weight to carry out well balanced to pump load.Its consequence is that motor is made positive work (motor drags load) in about half period, and remaining clockwork motor is made negative work (load drive motor).Be example (down with) with oil pumper balancing weight equivalence gravity greater than pumping unit horsehead load equivalent gravity (the light cabrage of head is that nature stops the back balancing weight when being still in vertical lower A point): when motor is done positive work by reduction box, crank drive balancing weight by bottom dead centre A motor when horizontal B point moves, and increase with the increasing of equivalent arm of force OB ', motor is done positive work and is tending towards maximum when balancing weight moves to the B point; When balancing weight by the B point by the C point when the D point moves, certain some walking beam both sides equivalence gravity is suitable between C, D, the motor acting levels off to and zero reaches balance; Balancing weight continues to the operation of D point, along with the increase of 0D ', does negative work at balancing weight gravitional force effect lower crank by reduction box drive motor operation, and motor is done negative work and is tending towards maximum when balancing weight moves to the D point; Certain some walking beam both sides equivalence gravity is once more quite the time between D, A point, and motor transfers to once more and does positive work by making negative work.When motor was made negative work in this equipment, actual was that the potential energy of setting up when the oil pumper balancing weight is made positive work with motor changes into the electric energy feedback grid with extremely low efficient (making generator with motor once more).It not only causes a large amount of waste of energy, simultaneously particularly reactive power compensation of electric control system, soft start and frequency conversion system is brought very big harm.
3, summary of the invention
In order to solve the problems referred to above of existing oil pumper electric control system; the invention provides a kind of energy-saving control method of oil pumping machine; high energy-conservation motor starting, the defencive function that excellence can not only be provided from the motion tracking speed-change control device of this oil pumper; and can detect the running status of motor automatically; when motor occurs making the trend of negative work; dynamic adjustments improves motor speed or closes motor power in real time; make it not enter the negative work state; potential energy is directly utilized in the inertia mode; saves energy is eliminated the hidden danger that endangers electric control system to greatest extent.
The technical problem that method of the present invention will solve adopts following three kinds of modes to realize: 1) at oil pumper power switch circuit output frequency converter and electric power measurement controller are set, load to motor, electric current and voltage carry out from the motion tracking speed Control, controlled step is: 1. work as the oil pumper balancing weight and move to C, between the D point, walking beam both sides equivalence gravity is suitable, being about to occur motor does positive work and levels off to zero the time, provide dynamic control signal by the electric power measurement controller, PID adjuster by frequency converter is to the motor closed-loop control, real-time tracking is regulated, improve motor speed, and motor is done work slightly to reduction box, to guarantee that motor does not enter the negative work state, at this moment, sucker rod fast uplink; 2. when balancing weight moves between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces levels off to zero gradually, motor begins to do positive work once more, after the electric power measurement controller detects the motor positive work and increases gradually, inverter control motor is slowed down, when motor speed dropped to rated speed, the lower-frequency limit that frequency converter is set limited, and the control motor no longer slows down, and to drag balancing weight up once more.
2) at electric electromechanics source switching circuit output the electric power measurement controller is set, motor speed is set between motor and the electric electromechanics source switching circuit measures controller, motor is implemented to control from the motion tracking intermittent power supply, controlled step is: 1. when the oil pumper balancing weight moves between C, the D point, walking beam both sides equivalence gravity is suitable, being about to occur motor does positive work and levels off to zero the time, electric power measurement controller control electric electromechanics source switching circuit is closed motor power, at this moment, sucker rod fast uplink; 2. when balancing weight moves between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces levels off to zero gradually, motor speed drops to when setting rotating speed, motor speed is measured controller control electric electromechanics source switching circuit once more to the motor power supply, and it is up once more that motor drags balancing weight.
3) at electric electromechanics source switching circuit output frequency converter and electric power measurement controller are set, motor speed is set between motor and the frequency converter measures controller, motor is implemented to control from the motion tracking intermittent power supply, controlled step is: 1. when the oil pumper balancing weight moves between C, the D point, walking beam both sides equivalence gravity is suitable, being about to occur motor does positive work and levels off to zero the time, electric power measurement controller control of conversion device cuts out motor power, at this moment, and the sucker rod fast uplink; 2. when balancing weight moves between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces levels off to zero gradually, motor speed drops to when setting rotating speed, motor speed is measured controller control of conversion device once more to the motor power supply, and it is up once more that motor drags balancing weight.
The invention has the beneficial effects as follows, adopt electric current, voltage, load and rotating speed to motor to detect control from motion tracking, the inertia-gravity potential energy of oil pumper balancing weight is done work with motor cooperates utilization, has reduced the consumption of electric energy to greatest extent; The sucker rod speed uplink of oil pumper is accelerated, and downstream rate is constant, under the prerequisite that does not increase power consumption, has shortened jig frequency cycle time, reduces pump and leaks, and makes that the jig frequency number increases in the unit interval, has improved oil well output; This technology has thoroughly solved the problem that threephase asynchronous is done negative work, makes the motor load to reduce relatively, has reduced motor temperature, increases the service life; In the time of can also having avoided motor to do negative work to the infringement of power switch circuit.
4, description of drawings
Fig. 1 is the energy conservation schematic diagram of oil pumper.
Fig. 2 adopts frequency converter and electric power measurement controller to cooperate the circuit theory diagrams that motor gear box is controlled with power switch circuit.
Fig. 3 adopts electric power measurement controller and motor speed measurement controller to cooperate the circuit theory diagrams that the motor intermittent power supply is controlled with power switch circuit.
Fig. 3 adopts electric power measurement controller and motor speed measurement controller to cooperate the circuit theory diagrams that the motor intermittent power supply is controlled with power switch circuit.
The present invention is described in more detail below in conjunction with drawings and Examples.
Embodiment
Energy-saving control method of the present invention mainly contains dual mode:
First kind of control mode is: at oil pumper power switch circuit output frequency converter and electric power measurement controller are set, load to motor, electric current and voltage carry out from the motion tracking speed Control, controlled step is: 1. work as the oil pumper balancing weight and move to C, between the D point, walking beam both sides equivalence gravity is suitable, being about to occur motor does positive work and levels off to zero the time, provide dynamic control signal by the electric power measurement controller, PID adjuster by frequency converter is to the motor closed-loop control, real-time tracking is regulated, improve motor speed, and motor is done work slightly to reduction box, to guarantee that motor does not enter the negative work state, at this moment, the sucker rod fast uplink; 2. when balancing weight moves between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces levels off to zero gradually, motor begins to do positive work once more, after the electric power measurement controller detects the motor positive work and increases gradually, inverter control motor is slowed down, when motor speed dropped to rated speed, the lower-frequency limit that frequency converter is set limited, and the control motor no longer slows down, and to drag balancing weight up once more.
Second kind of control mode is: at electric electromechanics source switching circuit output the electric power measurement controller is set, motor speed is set between motor and the electric electromechanics source switching circuit measures controller, motor is implemented to control from the motion tracking intermittent power supply, controlled step is: 1. when the oil pumper balancing weight moves between C, the D point, walking beam both sides equivalence gravity is suitable, being about to occur motor does positive work and levels off to zero the time, electric power measurement controller control electric electromechanics source switching circuit is closed motor power, at this moment, sucker rod fast uplink; 2. when balancing weight moves between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces levels off to zero gradually, motor speed drops to when setting rotating speed, motor speed is measured controller control electric electromechanics source switching circuit once more to the motor power supply, and it is up once more that motor drags balancing weight.
The third control mode is: at electric electromechanics source switching circuit output frequency converter and electric power measurement controller are set, motor speed is set between motor and the frequency converter measures controller, motor is implemented to control from the motion tracking intermittent power supply, controlled step is: 1. when the oil pumper balancing weight moves between C, the D point, walking beam both sides equivalence gravity is suitable, being about to occur motor does positive work and levels off to zero the time, electric power measurement controller control of conversion device cuts out motor power, at this moment, sucker rod fast uplink; 2. when balancing weight moves between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces levels off to zero gradually, motor speed drops to when setting rotating speed, motor speed is measured controller control of conversion device once more to the motor power supply, and it is up once more that motor drags balancing weight.
For the realization of first kind of Energy Saving Control mode, the frequency converter frequency lower limit set is≤50HZ that the minimum speed when setting the motor operation is the former setting rotating speed of motor, keeps the former jig frequency number of oil pumper
In the method for the invention, the electric electromechanics source switching circuit, electric power measurement controller, motor speed measure controller and frequency converter all is general-purpose machinery and electrical applicances.
Utilize frequency converter that motor is carried out the speed Control principle to be: the frequency converter starting characteristic is set by the moment lifts mode, with the maximum moment starting motor; The minimum speed that is 50HZ (or set less than 50HZ according to geological condition, reduce the jig frequency number, reduce and adopt liquid measure, saves energy) when limiting the motor operation with the frequency converter frequency lower limit set is former rotating speed, keeps the former jig frequency number of oil pumper constant.
Embodiment 1
Method of the present invention can be removed the inconvenience that changes replacing belt pulley when changing the oil pumper jig frequency because of geological condition from; Balance of well pumping unit is adjusted into oil pumper balancing weight equivalence gravity greater than pumping unit horsehead load equivalent gravity, and the light cabrage of head is the set positions A point that balancing weight was still in vertical lower after nature stopped.(as shown in Figure 1 and Figure 2) when oil pumper moves: near balancing weight operates in the A point during to the B point, motor is done positive work and is enlarged to maximum gradually, moving to certain point between C, D, walking beam both sides equivalence gravity motor near quite the time by the B point subsequently does positive work and is decreased to minimum value gradually, this traffic coverage motor is done positive work, the electric power measurement controller send frequency converter that motor is slowed down in good time detected positive function signal, but frequency converter is limited by lower frequency limit, to keep lower frequency limit constant, thereby motor speed is constant.Be about to occur motor and do positive work and level off to zero the time when balancing weight continues operation, by the electric power measurement controller detected positive work is leveled off to zero-signal and send the Frequency Converter Control motor to add
Speed also realizes closed-loop control, real-time tracking is regulated and is improved motor speed, and make motor along with reductor power input shaft rotational speed keeps the power input shaft of reduction box is made little merit, to guarantee that motor does not enter the negative work state, this moment, oil pumper entered the overspeed operation state, the oil well pump fast uplink; When balancing weight moved between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces leveled off to zero the time gradually, and motor begins to do positive work once more, and to drive balancing weight up.This moment, the electric power measurement controller sent the Frequency Converter Control motor to slow down detected positive function signal, and motor deceleration keeps rotating speed, beginning next one work period during to the frequency converter lower frequency limit.
Embodiment 2
At electric electromechanics source switching circuit output the electric power measurement controller is set, motor speed is set between motor and the electric electromechanics source switching circuit measures controller, motor is implemented to control from the motion tracking intermittent power supply, control mode is: 1. when the oil pumper balancing weight moves between C, the D point, walking beam both sides equivalence gravity is suitable, being about to occur motor does positive work and levels off to zero the time, electric power measurement controller control electric electromechanics source switching circuit is closed motor power, at this moment, sucker rod fast uplink; 2. when balancing weight moves between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces levels off to zero gradually, motor speed drops to when setting rotating speed, motor speed is measured controller control electric electromechanics source switching circuit once more to the motor power supply, and it is up once more that motor drags balancing weight.
Embodiment 3
Method of the present invention is to adopt the mode of measuring motor reel rotating speed and motor power consumption to control the motor intermittent power supply, as Fig. 1, shown in Figure 4, when balancing weight moves to certain point between C, D, is about to occur motor and does positive work and level off to zero the time, level off to zero by the detected positive work of electric power measurement controller, the control of conversion device stops to power to motor immediately.Oil pumper freely runs down between A, B point when moving near the A point (or) under the effect of balancing weight gravity inertial potential energy, the inertia consumption that gravitional force produces levels off to zero the time gradually, when dropping to former rated speed by the online detection motor speed of motor speed measurement controller, the control of conversion device recovers to continue the next duty cycle of operation to the motor power supply immediately.
Claims (2)
1. energy-saving control method of oil pumping machine is characterized in that having following three kinds of modes:
1) at oil pumper power switch circuit output frequency converter and electric power measurement controller are set, load to motor, electric current and voltage carry out from the motion tracking speed Control, controlled step is: 1. work as the oil pumper balancing weight and move to C, between the D point, walking beam both sides equivalence gravity is suitable, being about to occur motor does positive work and levels off to zero the time, provide dynamic control signal by the electric power measurement controller, PID adjuster by frequency converter is to the motor closed-loop control, real-time tracking is regulated, improve motor speed, and motor is done work slightly to reduction box, to guarantee that motor does not enter the negative work state, at this moment, the sucker rod fast uplink; 2. when balancing weight moves between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces levels off to zero gradually, motor begins to do positive work once more, after the electric power measurement controller detects the motor positive work and increases gradually, inverter control motor is slowed down, when motor speed dropped to rated speed, the lower-frequency limit that frequency converter is set limited, and the control motor no longer slows down, and to drag balancing weight up once more.
2) at electric electromechanics source switching circuit output the electric power measurement controller is set, motor speed is set between motor and the electric electromechanics source switching circuit measures controller, motor is implemented to control from the motion tracking intermittent power supply, controlled step is: 1. when the oil pumper balancing weight moves between C, the D point, walking beam both sides equivalence gravity is suitable, being about to occur motor does positive work and levels off to zero the time, electric power measurement controller control electric electromechanics source switching circuit is closed motor power, at this moment, sucker rod fast uplink; 2. when balancing weight moves between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces levels off to zero gradually, motor speed drops to when setting rotating speed, motor speed is measured controller control electric electromechanics source switching circuit once more to the motor power supply, and it is up once more that motor drags balancing weight.
3) at electric electromechanics source switching circuit output frequency converter and electric power measurement controller are set, motor speed is set between motor and the frequency converter measures controller, motor is implemented to control from the motion tracking intermittent power supply, controlled step is: 1. when the oil pumper balancing weight moves between C, the D point, walking beam both sides equivalence gravity is suitable, being about to occur motor does positive work and levels off to zero the time, electric power measurement controller control of conversion device cuts out motor power, at this moment, and the sucker rod fast uplink; 2. when balancing weight moves between A, B point under effect of inertia or move near the A point, the inertia consumption that gravitional force produces levels off to zero gradually, motor speed drops to when setting rotating speed, motor speed is measured controller control of conversion device once more to the motor power supply, and it is up once more that motor drags balancing weight.
2. control method according to claim 1 is characterized in that the frequency converter frequency lower limit set is≤50HZ, and the minimum speed when setting the motor operation is the former setting rotating speed of motor, keeps the former jig frequency number of oil pumper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101134215A CN101174813B (en) | 2007-10-15 | 2007-10-15 | Energy-saving control method of oil pumping machine |
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| CN2007101134215A CN101174813B (en) | 2007-10-15 | 2007-10-15 | Energy-saving control method of oil pumping machine |
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| CN101174813B CN101174813B (en) | 2012-12-12 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010124582A1 (en) * | 2009-04-30 | 2010-11-04 | 浙江关西电机有限公司 | Pumping unit system and electricity-saving control method thereof |
| CN107605464A (en) * | 2017-09-22 | 2018-01-19 | 中国石油集团西部钻探工程有限公司 | Gas well switch board control system and its control method |
| CN109555504A (en) * | 2019-01-25 | 2019-04-02 | 陈志国 | A kind of double counter weight devices of walking beam on pumping units sliding |
| CN113266318A (en) * | 2021-05-28 | 2021-08-17 | 陕西埃菲克能源科技有限公司 | Self-learning-based stroke frequency adjusting method for rod-type pumping unit well |
| CN114731882A (en) * | 2022-03-30 | 2022-07-12 | 南京林业大学 | Tree bundling mechanism |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1190002C (en) * | 2002-06-25 | 2005-02-16 | 满永奎 | Frequency control method for frequency changer for pumping unit |
| CN1489277A (en) * | 2002-10-11 | 2004-04-14 | 哈尔滨工业大学 | One-way energy transmission frequency transformer for beam pumping unit |
| CN2580108Y (en) * | 2002-11-01 | 2003-10-15 | 中国石油天然气股份有限公司 | Variable-stroke-number oil pumping unit |
| CN2784618Y (en) * | 2004-07-14 | 2006-05-31 | 朱立新 | Optimized operating device for beam-pumping unit |
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2007
- 2007-10-15 CN CN2007101134215A patent/CN101174813B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010124582A1 (en) * | 2009-04-30 | 2010-11-04 | 浙江关西电机有限公司 | Pumping unit system and electricity-saving control method thereof |
| CN101876239B (en) * | 2009-04-30 | 2014-01-15 | 浙江中科德润科技有限公司 | Pumping unit system and power saving control method thereof |
| CN107605464A (en) * | 2017-09-22 | 2018-01-19 | 中国石油集团西部钻探工程有限公司 | Gas well switch board control system and its control method |
| CN109555504A (en) * | 2019-01-25 | 2019-04-02 | 陈志国 | A kind of double counter weight devices of walking beam on pumping units sliding |
| CN109555504B (en) * | 2019-01-25 | 2023-08-18 | 陈志国 | Beam-pumping unit walking beam slides two counter weight devices |
| CN113266318A (en) * | 2021-05-28 | 2021-08-17 | 陕西埃菲克能源科技有限公司 | Self-learning-based stroke frequency adjusting method for rod-type pumping unit well |
| CN114731882A (en) * | 2022-03-30 | 2022-07-12 | 南京林业大学 | Tree bundling mechanism |
| CN114731882B (en) * | 2022-03-30 | 2024-01-12 | 南京林业大学 | Tree bundling mechanism |
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