CN103023047A - Device and method for dynamic reactive power compensation energy saving of oil pumping unit - Google Patents
Device and method for dynamic reactive power compensation energy saving of oil pumping unit Download PDFInfo
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Abstract
The invention discloses a device for dynamic reactive power compensation energy saving of an oil pumping unit. The device comprises a data collection control unit, voltage collection units, current collection units, a rectifying unit and an inversion unit. Power grid voltage is connected with the input end of the rectifying unit through a filtering circuit, the output end of the rectifying unit is connected with the input end of the inversion unit, the output end of the inversion unit is connected with the power supply end of a motor of the oil pumping unit, and the signal control ends of the rectifying unit and the inversion unit are connected with the driving signal output end of the data collection control unit respectively. The device is further provided with the voltage collection units and the current collection units, the signal output ends of the current collection units and the voltage collection units are connected with the signal input end of the data collection control unit, and the data collection control unit is further provided with a voltage zero passage signal detection system. The device can compensate reactive power of impact load, balances three-phase active current, enables the oil pumping unit to continuously pump oil, enables the oil pumping unit to run in intermittently or in frequency reducing mode according to oil quantity and automatically adjust pumping speed, improves power factor and reduces power loss.
Description
Technical field
The present invention relates to a kind of Non-power compensated energy saver, relate in particular to a kind of dynamic passive compensation energy saver and method of regulating oil pumper.
Background technology
At present, the electric part of oil pumper mainly is comprised of threephase asynchronous and control circuit, the motor drives sucker rod is done back and forth operation, and continuously from the underground ground that is extracted into, and pump load is as cycle continually varying periodic load take the oil pumper stroke with crude oil.Sucker rod load when descending is very light, is equivalent to zero load, and when rising owing to crude oil will be extracted out ground, so load is very heavy, be equivalent to be fully loaded with.Therefore the load of oil pumper is constantly to change, and period of change is also very short, and load variations twice in every jig frequency, and the heavy duty operating time is very short.The gravity that the half period built-in motor that moves upward at sucker rod owing to oil pumper will overcome sucker rod and adopt liquid does work; Because the potential energy difference of sucker rod kinetic energy and balance weight motor can occur and be dragged the phenomenon of rotation above synchronous speed, this moment, motor was to electrical network reverse pumping electric energy in the half period that sucker rod moves downward.So oil pumper has two kinds of different operating states in work: a kind of is the operation of driven by motor mechanical load, and this moment, the revolutional slip pass of motor was 0＜S＜1, and motor is the motor effect, and motor absorbs active power and reactive power from electrical network; Another kind is the operation of mechanical load dragging motor, and this moment, the revolutional slip pass of motor was S＜0, and motor is the generator operating state, and motor is sent active power from the electrical network absorbing reactive power to electrical network.No matter motor be operated in which kind of state, all will be from the electrical network absorbing reactive power.When wherein motor is in generating state, by electric machine theory as can be known, motor is unloaded reactive power from the reactive power that electrical network absorbs, and motor is when being in electric motor state, reactive power changes then relevant with the motor load size, and on-the-spot actual measured results shows: the load variations of the upper and lower stroke of oil pumper can cause the idle variation of 1～4kvar.Along with the minimizing of oil mass, the fully loaded number of times of oil pumper reduces gradually, and the most of the time is underloading or zero load, and underloading and the power factor when unloaded only have 0.2～0.3, thereby the load factor of motor is low, and power factor is lower, and the waste of electric energy is very serious.Therefore, the power factor that how to improve pumping-unit motor also just becomes the key of oil field energy saving.
The equipment that has moved has common frequency converter driven oil-pumping machine running, can realize the oil pumper speed-regulating function.Common frequency converter mostly adopts diode rectifier bridge that alternating current is changed into direct current, then adopts the IGBT inversion transformation technique that direct current is changed into all adjustable alternating current motor of electric voltage frequency.Motor that cause " falls to generate electricity " converter plant of this topological structure by ten runnings are uneven for beam pumping unit, usually the method that adopts energy consumption resistor to consume, but this method not only can produce a large amount of harmonic pollutions, output harmonic wave is comparatively serious, bring harmonic pollution for the electric power system electrical network, one cause a large amount of energy wastes simultaneously.
Summary of the invention
The purpose of this invention is to provide a kind of oil pumper Non-power compensated energy saver, can improve meritorious power, reduction power loss and the energy loss of oil pumper.
The present invention adopts following technical proposals:
A kind of oil pumper dynamic passive compensation energy saver, comprise data acquisition control unit, voltage acquisition unit, current acquisition unit, rectification unit, inversion unit, line voltage is connected with the input of rectification unit by filter circuit, the output of rectification unit is connected with the input of inversion unit, the output of inversion unit is connected with the power end of pumping-unit motor, and the signal controlling end of rectification unit, inversion unit is connected with the driving signal output part of data acquisition control unit respectively; The output of described line voltage is provided with voltage acquisition unit and current acquisition unit, the input of described inversion unit is provided with voltage acquisition unit and current acquisition unit, the power end of the motor of described oil pumper is provided with the current acquisition unit, be connected signal output part and be connected with the signal input part of data acquisition control unit in described current acquisition unit with voltage acquisition unit, described data acquisition control also is provided with the voltage zero-crossing signal detection system in the unit.
Described rectification unit adopts six power electronic device IGBT to consist of three-phase commutation bridge, and wherein the two ends of each IGBT are parallel with fly-wheel diode; Described inversion unit adopts six power electronic device IGBT to consist of three phase inverter bridge, and wherein the two ends of each IGBT are parallel with fly-wheel diode.
Be connected with two electric capacity of series connection between the dc output end of described rectification unit, the two ends of two electric capacity all are parallel with resistance.
The dc output end of described rectification unit is connected with the dc bus charging circuit.
Described dc bus charging circuit comprises transformer, first to fourth diode, the branch circuit parallel connection that the branch road that the first diode and the second diode are composed in series and the 3rd diode and the 4th diode are composed in series, the input of transformer is connected with line voltage, the first output of transformer connects the positive pole of the first diode, the second output of transformer connects the negative pole of the 4th diode, the negative pole of the negative pole of the first diode and the 3rd diode connects the first end of dc output end, and the positive pole of the negative pole of the 3rd diode and the 4th diode connects the second end of dc output end.
The communication ends of described data acquisition control unit is connected with the backstage monitoring device.
A kind of reactive-load compensation method of oil pumper dynamic passive compensation energy saver, the voltage zero-crossing signal detection system sends zero passage interrupt signal and zero passage logical signal to data acquisition control unit and pulse-width signal maker when each electrical network zero cross signal arrives, after data acquisition control cell response zero passage interrupt requests, the data acquisition control unit enters interrupt service routine, correcting errors of signal at first judged in the data acquisition control unit in this interrupt service routine, then start the first point sampling of each power frequency period, each power frequency period carries out 12 samplings and calculates; The electric current and voltage data acquisition system carries out delivering to the data acquisition control unit after the computing to data, generation PWM pulse-width signal is processed to the operation of driver element control rectification unit and inversion unit to processing data analysis later in the data acquisition control unit, regulate the control parameter and export required waveform, the regulation voltage waveform is regulated current waveform and phase place to realize required power factor and stable DC voltage to follow the tracks of electrical network in real time.
Described electric current and voltage data acquisition system is carried out the computing formula to data and is adopted 12 fourier algorithms to carry out the calculating of calculating voltage current sample.
Oil pumper dynamic passive compensation energy saver of the present invention can compensate the reactive power of impact load, balance three-phase active current, oil pumper is pumped continuously, can make again oil pumper according to oil mass and intermittent operation or frequency reducing operation, speed is extracted in the automatic dynamic adjustment, has reduced reactive loss, can also improve the meritorious of equipment, improve power factor, reduced energy loss; The harmonic content that this device self produces is extremely low, and is noiseless to electrical network, and also improved power grid quality, greatly reduce supply current, thereby alleviated the burden of electrical network and transformer, lowered line loss, save electric energy, not only reduced energy consumption but also improved oil yield, efficient energy-saving.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is the schematic diagram of dc bus charging circuit among the present invention.
Embodiment
As shown in Figure 1, oil pumper dynamic passive compensation energy saver of the present invention, comprise data acquisition control unit 10, voltage acquisition unit, current acquisition unit, rectification unit 8, inversion unit 9, line voltage is connected with the input of rectification unit 8 by filter circuit (capacitor C 1, C2, C3 and reactor L1 are connected L2, L3 consist of), the output of rectification unit 8 is connected with the input of inversion unit 9, and the output of inversion unit 9 is connected with the power end of pumping-unit motor M; Wherein said rectification unit 8 adopts six power electronic device IGBT to consist of three-phase commutation bridge, and wherein the two ends of each IGBT are parallel with fly-wheel diode; Described inversion unit 9 adopts six power electronic device IGBT to consist of three phase inverter bridge, wherein the two ends of each IGBT are parallel with fly-wheel diode, the grid of each IGBT is connected with the driving signal output part of data acquisition control unit 10 respectively, data acquisition control unit 10 adopts dsp processor, and the communication ends of dsp processor 10 is connected with the backstage monitoring device.Wherein the output of line voltage is provided with AC voltage sampling unit 1 and AC current collecting unit 2, the output of rectification unit 8 is provided with direct current collecting unit 3, the input of inversion unit 9 is provided with direct voltage collecting unit 5 and direct current collecting unit 4, direct voltage collecting unit 6, the power end of the motor M of described oil pumper is provided with AC current collecting unit 7, described AC voltage sampling unit 1, AC current collecting unit 2, direct current collecting unit 3, direct voltage collecting unit 5, direct current collecting unit 4, direct voltage collecting unit 6, the signal output part of AC current collecting unit 7 is connected with the signal input part of data acquisition control unit 10 respectively, and the communication ends of data acquisition control unit 10 is connected with the backstage monitoring device.Be connected with two capacitor C 4, the C5 of series connection between dc output end P, the N of described rectification unit 8, the two ends of capacitor C 4, C5 are parallel with respectively resistance R 2 and resistance R 1; The dc output end P of rectification unit 8, N also is connected with the dc bus charging circuit, the dc bus charging circuit comprises transformer T, first to fourth diode D1, D2, D3, D4, the branch circuit parallel connection that the branch road that the first diode D1 and the second diode D2 are composed in series and the 3rd diode D3 and the 4th diode D4 are composed in series, the input of transformer T is connected with line voltage, the first output of transformer T connects the positive pole of the first diode D1, the second output of transformer T connects the negative pole of the 4th diode D4, the negative pole of the negative pole of the first diode D1 and the 3rd diode D3 connects the first end (P end) of dc output end, and the positive pole of the negative pole of the 3rd diode D3 and the 4th diode D4 connects second end (N end) of dc output end.Be connected with capacitor C 6 between the input of inversion unit 9, also be connected with energy-dissipating brake circuit between the input of inversion unit 9, comprise brake resistance R3 and power electronic device IGBT, the first end of the input of inversion unit 9 connects brake resistance R3, the other end of brake resistance R3 connects the collector electrode of IGBT, the emitter of IGBT connects the second end of the input of inversion unit 9, the emitter and collector two ends of IGBT are parallel with fly-wheel diode, and the grid of IGBT is connected with the driving signal output part of data acquisition control unit 10.
As shown in Figure 1, what the present invention adopted is the compensation way of Injection Current, namely realize compensation by injecting the electric current that equates with the harmonic wave that needs compensation and reactive current to system, sample to each voltage acquisition unit and current acquisition unit in real time in data acquisition control unit 10, analyze harmonic wave and the reactive current component of needs compensation according to the signal that samples, then calculate the space voltage vector PWM control signal of control IGBT, the gate switch of output IGBT drives signal, stablize the voltage of AC and DC side, the response time of whole device reaches Millisecond, can compensate very fast instantaneous load, it is fast to be fit to very much load variations, the impact load.Can adjust the power factor of input on the one hand, and can realize the energy in bidirectional flow function, substantially not produce harmonic wave, eliminate the harmonic pollution to electrical network, the realization power factor (PF) can be regulated, and usually remains near 1.When the motor M of oil pumper was in generating state, inversion module and rectification module exchange function were realized the two-way flow of energy, and realized that power factor (PF) is 1 electric energy feedback, does not pollute electrical network.This device has solved the reactive power compensation problem in oil field substantially after the operation of oil field, realized the reactive power compensation on the spot function in oil field, loss on the elimination circuit, and the idle voltage-drop that causes on the circuit, stablized the terminal voltage of oilfield electric net, increased the meritorious of motor of oil extractor and exerted oneself.
Described data acquisition control also is provided with the voltage zero-crossing signal detection system in the unit.Reactive-load compensation method, it is characterized in that: the voltage zero-crossing signal detection system sends zero passage interrupt signal and zero passage logical signal to data acquisition control unit and pulse-width signal maker when each electrical network zero cross signal arrives, after data acquisition control cell response zero passage interrupt requests, the data acquisition control unit enters interrupt service routine, correcting errors of signal at first judged in the data acquisition control unit in this interrupt service routine, then start the first point sampling of each power frequency period, each power frequency period carries out 12 samplings and calculates; The electric current and voltage data acquisition system carries out delivering to the data acquisition control unit after the computing to data, generation PWM pulse-width signal is processed to the operation of driver element control rectification unit and inversion unit to processing data analysis later in the data acquisition control unit, regulate the control parameter and export required waveform, the regulation voltage waveform is regulated current waveform and phase place to realize required power factor and stable DC voltage to follow the tracks of electrical network in real time.
Described electric current and voltage data acquisition system is carried out the computing formula to data and is adopted 12 fourier algorithms to carry out the calculating of calculating voltage current sample:
Using 12 fourier algorithms to carry out the electric current and voltage sampling calculates:
After the formula expansion, the voltage real part:
The voltage imaginary part:
In the formula
U j (
j=0,1 ..., 11) and be 30 ° 12 the equidistant sampled values (instantaneous voltage) apart in the signal period T, so have:
12 fourier algorithms have the ability of elimination DC component and high order harmonic component, and precision is higher, and are with the most use in microcomputer excitation regulator.
Start first point sampling in each cycle in above-mentioned zero crossing interrupt routine the inside, descend the sampling of any to calculate every 1/12 cycle afterwards.
12 Fu Shi power algorithms:
Utilize fourier algorithm can calculate real part and the imaginary part of voltage vector:
The voltage real part:
The voltage imaginary part:
In like manner, also can calculate with fourier algorithm real part and the imaginary part of current phasor:
The electric current real part
The electric current imaginary part
So, apparent power
I is the conjugation of I in the formula.
Active power
Reactive power
Utilize reactive power to carry out the adjusting of reactive power as the reference variable, the regulating power factor.
This device has been realized the characteristics of the unexistent high power factors of speed regulating device, can be in the reactive power compensation of motor being carried out realize in the speed regulation process electrical network, and detection of grid voltage and current state judges whether and need to be compensated electric network reactive-load in real time; Cause network voltage unstable if detect in the power network reactive power condition that occurred repaying a kindness, also in time absorbing reactive power to reduce or to eliminate reactive power and cross and mend the adverse effect that electrical network is caused.If vigorously promote the use the reactive power compensation on the spot function that can realize power network, the power consumption that reactive power causes on the reduction power network and the voltage of stable power net, the voltage stability of raising power network.
Claims (8)
1. oil pumper dynamic passive compensation energy saver, it is characterized in that: comprise data acquisition control unit, voltage acquisition unit, current acquisition unit, rectification unit, inversion unit, line voltage is connected with the input of rectification unit by filter circuit, the output of rectification unit is connected with the input of inversion unit, the output of inversion unit is connected with the power end of pumping-unit motor, and the signal controlling end of rectification unit, inversion unit is connected with the driving signal output part of data acquisition control unit respectively; The output of described line voltage is provided with voltage acquisition unit and current acquisition unit, the input of described inversion unit is provided with voltage acquisition unit and current acquisition unit, the power end of the motor of described oil pumper is provided with the current acquisition unit, be connected signal output part and be connected with the signal input part of data acquisition control unit in described current acquisition unit with voltage acquisition unit, described data acquisition control also is provided with the voltage zero-crossing signal detection system in the unit.
2. oil pumper dynamic passive compensation energy saver according to claim 1 is characterized in that: described rectification unit adopts six power electronic device IGBT to consist of three-phase commutation bridges, and wherein the two ends of each IGBT are parallel with fly-wheel diode; Described inversion unit adopts six power electronic device IGBT to consist of three phase inverter bridge, and wherein the two ends of each IGBT are parallel with fly-wheel diode.
3. oil pumper dynamic passive compensation energy saver according to claim 2, it is characterized in that: be connected with two electric capacity of series connection between the dc output end of described rectification unit, the two ends of two electric capacity all are parallel with resistance.
4. oil pumper dynamic passive compensation energy saver according to claim 3, it is characterized in that: the dc output end of described rectification unit is connected with the dc bus charging circuit.
5. oil pumper dynamic passive compensation energy saver according to claim 4, it is characterized in that: described dc bus charging circuit comprises transformer, first to fourth diode, the branch circuit parallel connection that the branch road that the first diode and the second diode are composed in series and the 3rd diode and the 4th diode are composed in series, the input of transformer is connected with line voltage, the first output of transformer connects the positive pole of the first diode, the second output of transformer connects the negative pole of the 4th diode, the negative pole of the negative pole of the first diode and the 3rd diode connects the first end of dc output end, and the positive pole of the negative pole of the 3rd diode and the 4th diode connects the second end of dc output end.
6. oil pumper dynamic passive compensation energy saver according to claim 5, it is characterized in that: the communication ends of described data acquisition control unit is connected with the backstage monitoring device.
7. the reactive-load compensation method of oil pumper dynamic passive compensation energy saver according to claim 1, it is characterized in that: the voltage zero-crossing signal detection system sends zero passage interrupt signal and zero passage logical signal to data acquisition control unit and pulse-width signal maker when each electrical network zero cross signal arrives, after data acquisition control cell response zero passage interrupt requests, the data acquisition control unit enters interrupt service routine, correcting errors of signal at first judged in the data acquisition control unit in this interrupt service routine, then start the first point sampling of each power frequency period, each power frequency period carries out 12 samplings and calculates; The electric current and voltage data acquisition system carries out delivering to the data acquisition control unit after the computing to data, generation PWM pulse-width signal is processed to the operation of driver element control rectification unit and inversion unit to processing data analysis later in the data acquisition control unit, regulate the control parameter and export required waveform, the regulation voltage waveform is regulated current waveform and phase place to realize required power factor and stable DC voltage to follow the tracks of electrical network in real time.
8. reactive-load compensation method according to claim 7 is characterized in that: described electric current and voltage data acquisition system is carried out the computing formula to data and is adopted 12 fourier algorithms to carry out the calculating voltage current sample to calculate.
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| CN104485673A (en) * | 2014-11-24 | 2015-04-01 | 中国石油大学(华东) | Oilfield distribution network reactive optimizing method based on probability of dynamic load characteristics of oil pumping unit |
| CN105003252A (en) * | 2015-06-15 | 2015-10-28 | 山东天工石油装备有限公司 | Oil sucking machine energy-saving compensation system efficiency test instrument |
| CN106321071A (en) * | 2016-08-31 | 2017-01-11 | 中国石油集团东方地球物理勘探有限责任公司 | Method of parameter optimization of pump jack |
| CN107888082A (en) * | 2017-12-15 | 2018-04-06 | 天水电气传动研究所有限责任公司 | A kind of converter with Harmonics elimination and no-power compensation function |
| CN110460287A (en) * | 2019-06-24 | 2019-11-15 | 无锡旭菱电子科技有限公司 | A kind of pumping unit speed compensation device and method based on cloud platform |
| CN110492828A (en) * | 2019-06-24 | 2019-11-22 | 无锡旭菱电子科技有限公司 | A kind of pump load compensation device and method based on cloud platform |
| CN110488186A (en) * | 2019-06-24 | 2019-11-22 | 无锡旭菱电子科技有限公司 | A kind of pumping unit intelligent compensation monitoring system |
| CN112145467A (en) * | 2020-09-03 | 2020-12-29 | 山西晋城无烟煤矿业集团有限责任公司 | Controllable fan reactive compensation frequency conversion starting drive of output amount of wind |
| US11955782B1 (en) | 2022-11-01 | 2024-04-09 | Typhon Technology Solutions (U.S.), Llc | System and method for fracturing of underground formations using electric grid power |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485673A (en) * | 2014-11-24 | 2015-04-01 | 中国石油大学(华东) | Oilfield distribution network reactive optimizing method based on probability of dynamic load characteristics of oil pumping unit |
| CN105003252A (en) * | 2015-06-15 | 2015-10-28 | 山东天工石油装备有限公司 | Oil sucking machine energy-saving compensation system efficiency test instrument |
| CN106321071A (en) * | 2016-08-31 | 2017-01-11 | 中国石油集团东方地球物理勘探有限责任公司 | Method of parameter optimization of pump jack |
| CN106321071B (en) * | 2016-08-31 | 2020-04-21 | 中国石油集团东方地球物理勘探有限责任公司 | Production parameter optimization method for oil pumping unit |
| CN107888082A (en) * | 2017-12-15 | 2018-04-06 | 天水电气传动研究所有限责任公司 | A kind of converter with Harmonics elimination and no-power compensation function |
| CN110460287A (en) * | 2019-06-24 | 2019-11-15 | 无锡旭菱电子科技有限公司 | A kind of pumping unit speed compensation device and method based on cloud platform |
| CN110492828A (en) * | 2019-06-24 | 2019-11-22 | 无锡旭菱电子科技有限公司 | A kind of pump load compensation device and method based on cloud platform |
| CN110488186A (en) * | 2019-06-24 | 2019-11-22 | 无锡旭菱电子科技有限公司 | A kind of pumping unit intelligent compensation monitoring system |
| CN112145467A (en) * | 2020-09-03 | 2020-12-29 | 山西晋城无烟煤矿业集团有限责任公司 | Controllable fan reactive compensation frequency conversion starting drive of output amount of wind |
| US11955782B1 (en) | 2022-11-01 | 2024-04-09 | Typhon Technology Solutions (U.S.), Llc | System and method for fracturing of underground formations using electric grid power |
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Effective date of registration: 20160323 Address after: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone, Stone Town Stone Village Village No. 228 East Applicant after: Henan Ennaiji Electric Co., Ltd. Address before: The northern section of Henan Province Cultural Road 450044 Huiji District of Zhengzhou City No. 668 Applicant before: Henan Energy Electric Co., Ltd. |
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