CN103023047B - Oil pumper dynamic passive compensation energy saver and method - Google Patents
Oil pumper dynamic passive compensation energy saver and method Download PDFInfo
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- CN103023047B CN103023047B CN201210533457.XA CN201210533457A CN103023047B CN 103023047 B CN103023047 B CN 103023047B CN 201210533457 A CN201210533457 A CN 201210533457A CN 103023047 B CN103023047 B CN 103023047B
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention discloses a kind of oil pumper dynamic passive compensation energy saver, comprise data collection 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 drive singal output of data collection control unit respectively; Also be provided with voltage acquisition unit and current acquisition unit, the signal output part of each electric current, voltage acquisition unit is connected with the signal input part of data collection control unit, is also provided with voltage zero-crossing signal detection system in described data collection control unit.The present invention can compensate the reactive power of impact load, and balance three-phase active current, can make oil pumper pump continuously, intermittent operation or frequency reducing run according to oil mass to make again oil pumper, automatic dynamic adjustment extraction speed, improves power factor, reduces energy loss.
Description
Technical field
The present invention relates to a kind of Non-power compensated energy saver, particularly relate to a kind of the dynamic passive compensation energy saver and the method that regulate oil pumper.
Background technology
At present, the electric part of oil pumper is mainly made up of threephase asynchronous and control circuit, motor drives sucker rod to do back and forth to run, and crude oil is extracted into ground from underground continuously, and pump load is for cycle continually varying periodic load with oil pumper stroke.Sucker rod load when declining is very light, is equivalent to zero load, and when rising owing to crude oil will be extracted out ground, therefore load is very heavy, is equivalent to be fully loaded with.Therefore the load of oil pumper is constantly change, and period of change is also very short, load variations twice in every jig frequency, and the heavy duty work time is very short.Sucker rod to be overcome due to oil pumper at the half period built-in motor that sucker rod moves upward and adopt the gravity of liquid and do work; Because the potential energy difference of sucker rod kinetic energy and balance weight in the half period that sucker rod moves downward, there will be motor and dragged the phenomenon rotating over synchronous speed, now motor is to electrical network reverse pumping electric energy.So oil pumper has two kinds of different operating states when work: one is that driven by motor mechanical load runs, now the revolutional slip of motor closes is 0 < S < 1, motor is motor effect, and motor absorbs active power and reactive power from electrical network; Another kind is that mechanical load dragging motor runs, and now the revolutional slip of motor closes is S < 0, and motor is generator operation state, and motor, from electrical network absorbing reactive power, sends active power to electrical network.No matter motor be operated in which kind of state, all will from electrical network absorbing reactive power.When wherein motor is in generating state, from electric machine theory, the reactive power that motor absorbs from electrical network and unloaded reactive power, and motor is when being in electric motor state, reactive power change is then relevant with 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 change of 1 ~ 4kvar.Along with the minimizing of oil mass, the number of times that oil pumper is fully loaded with reduces gradually, and the most of the time is underloading or zero load, and power factor when underloading and zero load only has 0.2 ~ 0.3, and thus 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 how improving pumping-unit motor also just becomes the key of oil field energy saving.
The equipment run has common frequency converter driven oil-pumping machine to operate, and can realize oil pumper speed-regulating function.Common frequency converter mostly adopts diode rectifier bridge that AC conversion is become direct current, then adopts IGBT inversion transformation technique direct current to be changed into all adjustable alternating current motor of electric voltage frequency.For beam pumping unit, by ten runnings are uneven, motor that is that cause " falls to generate electricity " converter plant of this topological structure, the method that usual employing energy consumption resistor consumes, but this method not only can produce a large amount of harmonic pollutions, output harmonic wave is comparatively serious, bring harmonic pollution to electric power system electrical network, one cause a large amount of energy wastes simultaneously.
Summary of the invention
The object of this invention is to provide a kind of oil pumper Non-power compensated energy saver, the meritorious power of oil pumper can be improved, reduce power loss and energy loss.
The present invention adopts following technical proposals:
A kind of oil pumper dynamic passive compensation energy saver, comprise data collection 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 drive singal output of data collection 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 current acquisition unit, described current acquisition unit is connected with the signal input part of data collection control unit with the signal output part of voltage acquisition unit, is also provided with voltage zero-crossing signal detection system in described data collection control unit.
Described rectification unit adopts six power electronic device IGBT to form 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 form 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 are all parallel with resistance.
The DC output end of described rectification unit is connected with 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 first diode and the second Diode series form forms with the 3rd diode and the 4th Diode series, the input of transformer is connected with line voltage, first output of transformer connects the positive pole of the first diode, second output of transformer connects the negative pole of the 4th diode, the negative pole of the first diode is connected the first end of DC output end with the negative pole of the 3rd diode, the negative pole of the 3rd diode is connected the second end of DC output end with the positive pole of the 4th diode.
The communication ends of described data collection control unit is connected with backstage monitoring device.
A kind of reactive-load compensation method of oil pumper dynamic passive compensation energy saver, voltage zero-crossing signal detection system sends zero passage interrupt signal and zero passage logical signal when each electrical network zero cross signal arrives to data collection control unit and pulse-width signal maker, when after data collection control unit response zero passage interrupt requests, data collection control unit enters interrupt service routine, in this interrupt service routine, first data collection control unit judges correcting errors of signal, then the first point sampling of each power frequency period is started, each power frequency period carries out 12 samplings and calculates, electric current and voltage data acquisition system delivers to data collection control unit after carrying out computing to data, data collection control unit controls the operation of rectification unit and inversion unit to driver element to the data analysis process generation PWM pulse-width signal after process, regulable control parameter exports required waveform, real-time regulation voltage waveform, to follow the tracks of electrical network, regulates current waveform and phase place to realize required power factor and stable DC voltage.
Described electric current and voltage data acquisition system is carried out 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 can be made to pump continuously, intermittent operation or frequency reducing run according to oil mass to make again oil pumper, automatic dynamic adjustment extraction speed, decreases reactive loss, can also improve the meritorious of equipment, improve power factor, reduce energy loss; The harmonic content that this device self produces is extremely low, noiseless to electrical network, and also improves power grid quality, substantially reduce supply current, thus alleviate the burden of electrical network and transformer, reduce line loss, save electric energy, both decreased energy consumption and turn improved oil yield, efficient energy-saving.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is the schematic diagram of DC bus charging circuit in the present invention.
Embodiment
As shown in Figure 1, oil pumper dynamic passive compensation energy saver of the present invention, comprise data collection 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 (electric capacity C1, C2, C3 are formed with reactor L1, L2, L3), 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 form 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 form 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 drive singal output of data collection control unit 10 respectively, data collection control unit 10 adopts dsp processor, and the communication ends of dsp processor 10 is connected with 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 collection control unit 10 respectively, the communication ends of data collection control unit 10 is connected with backstage monitoring device.Two electric capacity C4, C5 being connected with series connection between DC output end P, N of described rectification unit 8, the two ends of electric capacity C4, C5 are parallel with resistance R2 and resistance R1 respectively, the DC output end P of rectification unit 8, N is also connected with DC bus charging circuit, DC bus charging circuit comprises transformer T, first to fourth diode D1, D2, D3, D4, the branch road that first diode D1 and the second diode D2 is composed in series and the branch circuit parallel connection that the 3rd diode D3 and the 4th diode D4 is composed in series, the input of transformer T is connected with line voltage, first output of transformer T connects the positive pole of the first diode D1, second output of transformer T connects the negative pole of the 4th diode D4, the negative pole of the first diode D1 is connected the first end (P end) of DC output end with the negative pole of the 3rd diode D3, the negative pole of the 3rd diode D3 is connected second end (N end) of DC output end with the positive pole of the 4th diode D4.Electric capacity C6 is connected with between the input of inversion unit 9, also energy-dissipating brake circuit is connected with 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 drive singal output of data collection control unit 10.
As shown in Figure 1, what the present invention adopted is the compensation way of Injection Current, namely realize compensating by injecting the electric current equal with the harmonic and reactive currents needing to compensate to system, data collection control unit 10 is sampled to each voltage acquisition unit and current acquisition unit in real time, carry out analyzing the harmonic and reactive currents component needing to compensate according to the signal sampled, then the space voltage vector PWM control signal of control IGBT is calculated, export the gate switch drive singal of IGBT, stablize the voltage of AC and DC side, the response time of whole device reaches Millisecond, instantaneous load can be compensated very fast, be applicable to very much load variations fast, impact load.The power factor of input can be adjusted on the one hand, and energy in bidirectional flow function can be realized, substantially not produce harmonic wave, eliminate the harmonic pollution to electrical network, realize power factor (PF) adjustable, usually remain near 1.When the motor M of oil pumper is in generating state, inversion module and rectification module exchange function, realize the two-way flow of energy, and realize the electric energy feedback that power factor (PF) is 1, do not pollute electrical network.This device substantially solves the reactive power compensation problem in oil field after oil field is run, achieve the reactive power compensation on the spot function in oil field, loss on basic elimination circuit, and the idle voltage-drop caused on circuit, stabilize the terminal voltage of oilfield electric net, increase the meritorious of motor of oil extractor and exert oneself.
Voltage zero-crossing signal detection system is also provided with in described data collection control unit.Reactive-load compensation method, it is characterized in that: voltage zero-crossing signal detection system sends zero passage interrupt signal and zero passage logical signal when each electrical network zero cross signal arrives to data collection control unit and pulse-width signal maker, when after data collection control unit response zero passage interrupt requests, data collection control unit enters interrupt service routine, in this interrupt service routine, first data collection control unit judges correcting errors of signal, then start the first point sampling of each power frequency period, each power frequency period carries out 12 samplings and calculates; Electric current and voltage data acquisition system delivers to data collection control unit after carrying out computing to data, data collection control unit controls the operation of rectification unit and inversion unit to driver element to the data analysis process generation PWM pulse-width signal after process, regulable control parameter exports required waveform, real-time regulation voltage waveform, to follow the tracks of electrical network, regulates current waveform and phase place to realize required power factor and stable DC voltage.
Described electric current and voltage data acquisition system is carried out computing formula to data and is adopted 12 fourier algorithms to carry out the calculating of calculating voltage current sample:
Use 12 fourier algorithms to carry out electric current and voltage sampling to calculate:
，
After formula is launched, voltage real part:
Voltage imaginary part:
In formula
u j (
j=0,1 ..., 11) be in a signal period T at a distance of 12 equidistant sampled values (instantaneous voltage) of 30 °, so have:
(amplitude)
12 fourier algorithms have the ability of elimination DC component and high order harmonic component, and precision is higher, with the most use in microcomputer excitation regulator.
Inside above-mentioned zero crossing interrupt routine, start first point sampling in each cycle, under 1/12 cycle carried out, the sampling of any calculates afterwards.
12 fourier power algorithms:
Utilize fourier algorithm can calculate real part and the imaginary part of voltage vector:
Voltage real part:
Voltage imaginary part:
In like manner, real part and the imaginary part of current phasor also can be calculated with fourier algorithm:
Electric current real part
Electric current imaginary part
So, apparent power
In formula, I is the conjugation of I.
Active power
Reactive power
Utilize reactive power as the adjustment carrying out reactive power with reference to variable, regulating power factor.
This device achieves the feature of the unexistent high power factor of speed regulating device, can carry out the reactive power compensation realizing electrical network in speed regulation process to motor, and real-time detection of grid voltage and current condition adjudgement is compensated the need of to electric network reactive-load; If to detect in power network that the reactive power condition that occurred repaying a kindness causes network voltage unstable, also can cross to reduce or to eliminate reactive power the adverse effect that benefit causes electrical network by absorbing reactive power in time.Can realize the reactive power compensation on the spot function of power network if vigorously promote the use, the power consumption that on reduction power network, reactive power causes and the voltage of stable power net, improve the voltage stability of power network.
Claims (5)
1. an oil pumper dynamic passive compensation energy saver, it is characterized in that: comprise data collection 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 drive singal output of data collection control unit respectively, the output of described line voltage is provided with line voltage collecting unit and power network current collecting unit, the input of described inversion unit is provided with inverter voltage collecting unit and inverter current collecting unit, the power end of the motor of described oil pumper is provided with current of electric collecting unit, described power network current collecting unit, inverter current collecting unit, current of electric collecting unit and line voltage collecting unit, the signal output part of inverter voltage collecting unit is connected with the signal input part of data collection control unit, voltage zero-crossing signal detection system is also provided with in described data collection control unit,
Electric capacity is connected with between the input of inversion unit, also energy-dissipating brake circuit is connected with between the input of inversion unit, comprise brake resistance and IGBT, the first end of the input of inversion unit connects brake resistance, the other end of brake resistance connects the collector electrode of IGBT, the emitter of IGBT connects the second end of the input of inversion unit, and the emitter and collector two ends of IGBT are parallel with fly-wheel diode, and the grid of IGBT is connected with the drive singal output of data collection control unit;
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 are all parallel with resistance, and the DC output end of described rectification unit is connected with 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 first diode and the second Diode series form forms with the 3rd diode and the 4th Diode series, the input of transformer is connected with line voltage, first output of transformer connects the positive pole of the first diode, second output of transformer connects the negative pole of the 4th diode, the negative pole of the first diode is connected the first end of DC output end with the negative pole of the 3rd diode, the negative pole of the 3rd diode is connected the second end of DC output end with the positive pole of the 4th diode.
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 form 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 form 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, is characterized in that: the communication ends of described data collection control unit is connected with backstage monitoring device.
4. the reactive-load compensation method of oil pumper dynamic passive compensation energy saver according to claim 1, it is characterized in that: voltage zero-crossing signal detection system sends zero passage interrupt signal and zero passage logical signal when each electrical network zero cross signal arrives to data collection control unit and pulse-width signal maker, when after data collection control unit response zero passage interrupt requests, data collection control unit enters interrupt service routine, in this interrupt service routine, first data collection control unit judges correcting errors of signal, then the first point sampling of each power frequency period is started, each power frequency period carries out 12 samplings and calculates, electric current and voltage data acquisition system delivers to data collection control unit after carrying out computing to data, data collection control unit carries out analyzing the harmonic and reactive currents component needing to compensate according to the signal sampled, then data collection control unit controls the operation of rectification unit and inversion unit to driver element to the data analysis process generation PWM pulse-width signal after process, realize compensating by injecting the electric current equal with the harmonic and reactive currents needing to compensate to system, regulable control parameter exports required waveform, real-time regulation voltage waveform is to follow the tracks of electrical network, regulate current waveform and phase place to realize required power factor and stable DC voltage.
5. reactive-load compensation method according to claim 4, is characterized in that: it is that employing 12 fourier algorithms carry out the calculating of calculating voltage current sample that described electric current and voltage data acquisition system carries out computing to data.
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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 |
| 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 |
| 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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