CN202395458U - Dynamic reactive power compensation energy-saving device of pumping unit - Google Patents
Dynamic reactive power compensation energy-saving device of pumping unit Download PDFInfo
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- CN202395458U CN202395458U CN 201120515120 CN201120515120U CN202395458U CN 202395458 U CN202395458 U CN 202395458U CN 201120515120 CN201120515120 CN 201120515120 CN 201120515120 U CN201120515120 U CN 201120515120U CN 202395458 U CN202395458 U CN 202395458U
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- oil pumper
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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 utility model discloses a dynamic reactive power compensation energy-saving device of a pumping unit. The device comprises a data acquisition and control unit, a voltage acquisition unit, a current acquisition unit, a rectifying unit and an inversion unit; the voltage of a power grid is connected with the input end of the rectifying unit through a filter 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 pumping unit; the signal control ends of the rectifying unit and the inversion unit are respectively connected with the driving signal output end of the data acquisition and control unit; the device is also provided with the voltage acquisition unit and the current acquisition unit; and the signal output ends of the current acquisition unit and the voltage acquisition unit are connected with the signal input end of the data acquisition and control unit. Through the device, reactive power of an impact load can be compensated, three-phase active current is balanced, the pumping unit can continually pump oil, the pumping unit can intermittently run or run in a reduced frequency mode according to the oil quantity, the pumping speed is automatically and dynamically adjusted, the power factor is improved, and the loss of electrical energy is reduced.
Description
Technical field
The utility model relates to a kind of reactive power compensation energy saver, relates in particular to a kind of dynamic passive compensation energy saver of regulating oil pumper.
Background technology
At present; The electric part of oil pumper mainly is made up 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 to be the continuous varying cycles periodic load with 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 will extract crude oil 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 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 working states in work: a kind of is the operation of driven by motor mechanical load, and this moment, the revolutional slip relation 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 relation of motor was S＜0, and motor is the generator operating state, and motor is seen active power from the electrical network absorbing reactive power off 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; Can know by electric machine theory; Motor is unloaded reactive power from the reactive power that electrical network absorbs; And motor is when being in electric motor state, and it is then relevant with the motor load size that reactive power changes, 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 the power factor of underloading when unloaded has only 0.2～0.3, thereby the load factor of motor is low, and power factor is lower, and 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 to drag the oil pumper 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, adopts the IGBT inversion transformation technique that direct current is changed into all adjustable alternating current motor of electric voltage frequency then.Motor that cause " falls to generate electricity " converter plant of this topological structure by ten runnings are uneven to beam pumping unit; Usually adopt the method for power consumption resistance consumption; But this method not only can produce a large amount of harmonic pollutions; Output harmonic wave is comparatively serious, brings harmonic pollution for the electric power system electrical network, one causes a large amount of energy wastes simultaneously.
The utility model content
The purpose of the utility model provides a kind of oil pumper reactive power compensation energy saver, can improve meritorious power, reduction power loss and the energy loss of oil pumper.
The utility model 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 through 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 signal output 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, and the signal output part of described current acquisition unit and voltage acquisition unit is connected with the signal input part of data acquisition control unit.
Described rectification unit adopts six power electronic device IGBT to constitute 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 constitute 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 road that first diode and second diode are composed in series is parallelly connected with the branch road that the 3rd diode and the 4th diode are composed in series; The input of transformer is connected with line voltage; First output of transformer connects the positive pole of first diode; Second output of transformer connects the negative pole of the 4th diode, and the negative pole of the negative pole of first diode and the 3rd diode is connected first end of dc output end, and the positive pole of the negative pole of the 3rd diode and the 4th diode is connected second end of dc output end.
The communication ends of described data acquisition control unit is connected with the backstage monitoring device.
The utility model oil pumper dynamic passive compensation energy saver can compensate the reactive power of impact load, and balance three-phase active current can make oil pumper pump continuously; Can make oil pumper according to oil mass and intermittent operation or frequency reducing operation again; Automatic dynamic adjustment extraction speed 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; Reduce supply current greatly, thereby alleviated the burden of electrical network and transformer, lowered line loss; Practice thrift electric energy, not only reduced energy consumption but also improved oil yield, efficient energy-saving.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model;
Fig. 2 is the schematic diagram of dc bus charging circuit in the utility model.
Embodiment
As shown in Figure 1; The utility model oil pumper dynamic passive compensation energy saver; 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 through filter circuit (capacitor C 1, C2, C3 and reactor L1, L2, L3 constitute), and 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 constitute 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 constitute 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 signal output of data acquisition control unit 10 respectively; Data acquisition control unit 10 adopts dsp processor, and the communication ends of data acquisition control unit 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; The signal output part of 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, 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 the dc output end P of described rectification unit 8, the N, the two ends of capacitor C 4, C5 are parallel with resistance R 2 and resistance R 1 respectively; Dc output end P, the N of rectification unit 8 also are 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 road that the first diode D1 and the second diode D2 are composed in series is parallelly connected with the branch road that the 3rd diode D3 and the 4th diode D4 are 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, and the negative pole of the negative pole of the first diode D1 and the 3rd diode D3 is connected first end of dc output end (P end), and the positive pole of the negative pole of the 3rd diode D3 and the 4th diode D4 is connected second end of dc output end (N 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; First end of the input of inversion unit 9 connects brake resistance R3, and the other end of brake resistance R3 connects the collector electrode of IGBT, and the emitter of IGBT connects 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 signal output of data acquisition control unit 10.
As shown in Figure 1; What the utility model adopted is the compensation way of injection current; Promptly realize compensation through injecting the electric current that equates with 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 the harmonic wave and the reactive current component of needs compensation according to the signal that samples; Calculate the space voltage vector PWM control signal of control IGBT then; Export the gate switch drive signal of IGBT, stablize the voltage of AC side and DC side, the response time of whole device reaches Millisecond; Can compensate instantaneous load very fast, fast, the impact load of very suitable load variations.Can adjust the power factor of input, and can realize energy two-way flow function, not produce harmonic wave basically, eliminate harmonic pollution electrical network.Realize the power factor (PF) scalable, remain near 1 usually.When the motor M of oil pumper was in generating state, inversion unit and rectification unit 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 basically after the operation of oil field; Realized the reactive power compensation on the spot function in oil field; The basic loss of eliminating on the circuit; And the idle voltage landing that causes on the circuit, stablized the terminal voltage of oilfield electric net, increased the meritorious of motor of oil extractor and exerted oneself.
Claims (7)
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 through 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 signal output 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, and the signal output part of described current acquisition unit and voltage acquisition unit is connected with the signal input part of data acquisition control 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 constitute three-phase commutation 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 1 and 2 is characterized in that: described inversion unit adopts six power electronic device IGBT to constitute three phase inverter bridge, and wherein the two ends of each IGBT are parallel with fly-wheel diode.
4. oil pumper dynamic passive compensation energy saver according to claim 3 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.
5. oil pumper dynamic passive compensation energy saver according to claim 4, it is characterized in that: the dc output end of described rectification unit is connected with the dc bus charging circuit.
6. oil pumper dynamic passive compensation energy saver according to claim 5; It is characterized in that: described dc bus charging circuit comprises transformer, first to fourth diode; The branch road that first diode and second diode are composed in series is parallelly connected with the branch road that the 3rd diode and the 4th diode are composed in series; The input of transformer is connected with line voltage; First output of transformer connects the positive pole of first diode; Second output of transformer connects the negative pole of the 4th diode, and the negative pole of the negative pole of first diode and the 3rd diode is connected first end of dc output end, and the positive pole of the negative pole of the 3rd diode and the 4th diode is connected second end of dc output end.
7. oil pumper dynamic passive compensation energy saver according to claim 6 is characterized in that: the communication ends of described data acquisition control unit is connected with the backstage monitoring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120515120 CN202395458U (en) | 2011-12-12 | 2011-12-12 | Dynamic reactive power compensation energy-saving device of pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120515120 CN202395458U (en) | 2011-12-12 | 2011-12-12 | Dynamic reactive power compensation energy-saving device of pumping unit |
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|---|---|
| CN202395458U true CN202395458U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120515120 Expired - Fee Related CN202395458U (en) | 2011-12-12 | 2011-12-12 | Dynamic reactive power compensation energy-saving device of pumping unit |
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| CN (1) | CN202395458U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997569A (en) * | 2020-08-31 | 2020-11-27 | 辽宁弘毅科技有限公司 | Energy-saving method for variable-speed driving of beam-pumping unit based on frequency converter |
| 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 |
-
2011
- 2011-12-12 CN CN 201120515120 patent/CN202395458U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997569A (en) * | 2020-08-31 | 2020-11-27 | 辽宁弘毅科技有限公司 | Energy-saving method for variable-speed driving of beam-pumping unit based on frequency converter |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20141212 |
|
| EXPY | Termination of patent right or utility model |