CN202772597U - Dynamic energy-saving oil pumping control system - Google Patents
Dynamic energy-saving oil pumping control system Download PDFInfo
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- CN202772597U CN202772597U CN 201220468267 CN201220468267U CN202772597U CN 202772597 U CN202772597 U CN 202772597U CN 201220468267 CN201220468267 CN 201220468267 CN 201220468267 U CN201220468267 U CN 201220468267U CN 202772597 U CN202772597 U CN 202772597U
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Abstract
The present utility model discloses a dynamic energy-saving oil pumping control system. The system comprises a servo driver for dragging an oil pumping unit motor, and a super capacitor module accessed into a DC bus of the servo driver through a charge-discharge control circuit, and the number of super capacitors of the super capacitor module is corresponding to voltage of the DC bus. By adopting the control system, energy saving can be realized, and energy utilization rate can be enhanced.
Description
Technical field
The utility model relates to a kind of for the energy-conservation corollary equipment of oil field beam pumping unit.
Background technology
Beam pumping unit is a kind of machinery equipment of recover petroleum, is commonly called as " machine of kowtowing ", makes oil go out well by the way of pressurizeing.In the jig frequency of a complete cycle of oil pumper, along with the rise/fall of sucker rod, and make machine operation at electronic/generating state.The uphill process motor is from electrical network absorbed energy electric operation; The load characteristic of decline process motor is the potential load, and DH negative pressure etc. makes motor be in generating state in addition, and mechanical energy is converted to electric energy feedback to electrical network.This has also supplied prerequisite for the oil pumping Energy Conservation.
Frequency converter is not used in the oil field in early days, but adopts conversion motor driving wheel diameter to regulate stroke.The method uses face very narrow, the at present most employing in oil field frequency converter timings, change the output frequency of frequency converter according to the actual demand of oil well, regulate the number of strokes of oil pumper, because beam pumping unit belongs to potential energy loading high, as previously mentioned, the half period built-in motor that moves upward at sucker rod will overcome sucker rod and adopt the gravity of liquid and do work, in the half period that sucker rod moves downward 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.
Thereby oil pumping motor has two kinds of different operating states when work: a kind of is the operation of motor-driven mechanical load, and this moment, motor was the motor operation state, and oil pumper absorbs electric energy from electrical network; Another kind is to move at the mechanical load dragging motor; because the imbalance of balancing weight; this moment, motor was the generator operating state; motor produces reverse potential, and the frequency converter dc voltage will rise, because the input of frequency converter is diode rectification; energy can not flow in the other direction; this part electric energy does not flow back to the path of electrical network, and is logical for avoiding the frequency converter overvoltage protection, must consume on the spot by brake resistance.The method that adopts at present is brake unit and the brake resistance that adds assembly set according to transducer power in DC side, after brake unit and brake resistance are installed, when frequency changer direct current bus voltage rises to set point, can discharge by brake unit and brake resistance, by brake resistance excess energy is absorbed, but the energy of brake unit and brake resistance hyperabsorption is disadvantageous for oil pump energy-saving, and the electric energy that is usually consumed in vain by brake resistance reaches 20%.
Comprehensive above content is as can be known, and is little to the electrical network impact although electric current was less when frequency converter had the soft start function starting, the characteristics that energy consumption greatly reduces during starting, and frequency converter also can only be finished consumption more than energy with brake resistance at present.
The utility model content
Therefore, the purpose of this utility model be to provide a kind of can dynamic energy-saving the oil pumping control system, put forward high-octane utilance.
The technical scheme that the utility model adopts is:
A kind of dynamic energy-saving oil pumping control system, comprise the servo-driver for the driven oil-pumping machine motor, also comprise the super capacitor module by charge-discharge control circuit access servo-driver dc bus, wherein the voltage of the number of super capacitor coupling dc bus in the super capacitor module.
Dynamic energy-saving oil pumping control system according to said structure, the super capacitor module directly links to each other with the servo-driver dc bus, the servo-driver dc bus is positioned at after the servo-driver rectification module, when motor during at motoring condition, mechanical load consumes electric energy, is transformed into mechanical energy, at this moment, system's control dc bus absorbs the energy of this super capacitor module storage from the super capacitor module, and has reduced the energy consumption from grid side, reaches energy-conservation purpose.And be in when sending out dotted state at motor, the potential energy converting and energy of mechanical load becomes electric energy, the electric energy that produces feeds back to dc bus by the Converting Unit of servo-driver, this moment, the super capacitor module was from the dc bus absorbed energy, energy is temporarily stored, reduced the impact to electrical network and servo-driver.
Above-mentioned dynamic energy-saving oil pumping control system, described super capacitor module is serially connected with current-limiting resistance.
Above-mentioned dynamic energy-saving oil pumping control system, described current-limiting resistance also is connected to a direct current contactor, with when described super capacitor module voltage reaches setting threshold, the described current-limiting resistance of short circuit.
Above-mentioned dynamic energy-saving oil pumping control system, described servo-driver is furnished with brake resistance for subsequent use.
Above-mentioned dynamic energy-saving oil pumping control system, described charge-discharge control circuit is provided with fuse.
Description of drawings
Fig. 1 is the circuit theory diagrams according to a kind of dynamic energy-saving oil pumping control system of the present utility model.
Fig. 2 is a kind of circuit theory diagrams of charge-discharge control circuit.
Fig. 3 is servo-driver DC bus-bar voltage curve when not installing super capacitor additional.
Fig. 4 is the voltage curve behind servo-driver and the super capacitor common DC bus.
Fig. 5 is for installing super capacitor energy storage device front and back DC bus-bar voltage curve comparison figure additional under identical operating mode with a bite oil well.
Among the figure: 1, servo-driver, 2, the super capacitor module, 3, air circuit, 4, reactor, 5, D.C. contactor, 6, current-limiting resistance, 7, fuse.
Embodiment
With reference to Figure of description 1, servo-driver 1 or frequency converter, consist of main circuit by the dispatch from the factory mode of connection of handbook regulation of this servo-driver or frequency converter, by air circuit 3 and reactor 4 power supply is accessed the power supply terminal of described servo-driver or frequency converter 1, and connect pumping-unit motor from driving side U, V, W, PE.
Describe as an example of servo-driver example; be connected to brake resistance R1 at given terminal, this is the intrinsic configuration of brake resistance braking class servo-driver, in this programme; brake resistance R1 disposes as auxiliary standby, is used for the power consumption stop under the charge-discharge protection circuit failure conditions.
About described charge-discharge protection circuit, from the servo-driver leading-out terminal, be connected on the dc bus of servo-driver, consist of the main body of charge-discharge protection circuits with the super capacitor module 2 of one group of super capacitor formation.
Usually, in servo-driver or frequency converter, DC bus-bar voltage is 1.35 times of input voltage, and usually, in the application of pumping-unit motor, dc bus ceiling voltage tolerance value is 740V, when feedback voltage during greater than 740V, described brake resistance is access in, and unnecessary energy consumption is on brake resistance.
In this programme; super capacitor module and servo-driver or frequency converter have dc bus; servo-driver control stop transistor is opened when DC bus-bar voltage surpasses 600V; with unnecessary energy consumption on brake resistance; avoid DC bus-bar voltage too high, also play the effect of protection super capacitor, therefore; here can be 600V as loading voltage maximum above the super capacitor, and dispose accordingly the number of super capacitor.
In above-mentioned application, increase the super capacitor module, the situation of generating is arranged down in the normal operation, the super capacitor module absorbs and falls power generation part on the dc bus, and therefore the driver DC bus-bar voltage can not reach 600V in the super capacitor module works.On the other hand, brake resistance can not start generally speaking, only just can be access under above-mentioned specific condition, plays the effect of protection dc bus and super capacitor module.
Fig. 3 is that a kind of servo-driver adopts when not installing super capacitor energy storage device additional brake resistance to consume the energy of feedback, and the brake transistor threshold is 585V, DC bus-bar voltage curve t figure when installing super capacitor additional.
Can find out that from curve shown in Figure 3 this pumping unit of well has twice power generation process within each cycle, busbar voltage reaches the braking threshold, and the cumulative time accounts for about 1/4 of system cycle, and overall energy output is very large.If motor of oil extractor adopts power frequency or simple converting operation, the huge electric energy that produces in each cycle all can waste, and causes power consumption high.
Fig. 4 then be with shown in Figure 3 use with servo-driver with under the configuration condition with the super capacitor common DC bus after the DC bus-bar voltage curve, can find out from this curve, after adopting super capacitor, the huge energy that produces under the generating state in each cycle is all stored by super capacitor, busbar voltage is pulled down to, and the braking threshold no longer reaches, and the electric energy of namely feedback is by the super capacitor module stores, rather than become heat and be consumed, becoming energy consumption stop is the storage braking of energy inside.
In order to be illustrated more clearly in, illustrate that accompanying drawing 5 has represented to install super capacitor energy storage device front and back DC bus-bar voltage curve comparison additional with a bite oil well under identical operating mode, can find out from this curve, DC bus-bar voltage changes apparent in view before and after installing super capacitor energy storage device additional, after installing super capacitor additional, the huge energy that produces under the generating state in each cycle is all stored by super capacitor, busbar voltage is pulled down to, no longer reach the braking threshold, the electric energy that stores when motoring condition directly for motor, greatly reduce the energy that draws from electrical network, so that power consumption descends, saved cost of winning.
In further using, at first be subject to larger impact when the charging for fear of the super capacitor module, the current-limiting resistance 6 that shields for its serial connection, the namely resistance R shown in Fig. 12.In structure shown in Figure 2, R2-1 and R2-2 have served as the effect of current limliting.
In structure illustrated in figures 1 and 2, current-limiting resistance is implemented in the short circuit to current-limiting resistance under the established condition by D.C. contactor 5, thereby, reach the threshold value of setting when the super capacitor module, the namely voltage drop on super capacitor diminishes, and charging current reduces, and the impact of super capacitor is diminished, for fear of the too much consumption of energy on current-limiting resistance, by described D.C. contactor 5 the current-limiting resistance short circuit.
In further using; for charge-discharge control circuit arranges fuse 7; when being short-circuited or electric current when excessive; fuse is blown; super capacitor module and driver dc bus disconnect after the fuse blows; can both play a protective role to driver and super capacitor, with this understanding, dispose brake resistance for subsequent use and carry out dynamic braking.
Claims (5)
1. dynamic energy-saving oil pumping control system, comprise the servo-driver for the driven oil-pumping machine motor, it is characterized in that, also comprise the super capacitor module by charge-discharge control circuit access servo-driver dc bus, wherein the voltage of the number of super capacitor coupling dc bus in the super capacitor module.
2. dynamic energy-saving oil pumping control system according to claim 1 is characterized in that described super capacitor module is serially connected with current-limiting resistance.
3. dynamic energy-saving oil pumping control system according to claim 2 is characterized in that described current-limiting resistance also is connected to a direct current contactor, with when described super capacitor module voltage reaches setting threshold, and the described current-limiting resistance of short circuit.
4. according to claim 1 to 3 arbitrary described dynamic energy-saving oil pumping control system, it is characterized in that described servo-driver is furnished with brake resistance for subsequent use.
5. dynamic energy-saving oil pumping control system according to claim 4 is characterized in that described charge-discharge control circuit is provided with fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220468267 CN202772597U (en) | 2012-09-14 | 2012-09-14 | Dynamic energy-saving oil pumping control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220468267 CN202772597U (en) | 2012-09-14 | 2012-09-14 | Dynamic energy-saving oil pumping control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202772597U true CN202772597U (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220468267 Expired - Fee Related CN202772597U (en) | 2012-09-14 | 2012-09-14 | Dynamic energy-saving oil pumping control system |
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| Country | Link |
|---|---|
| CN (1) | CN202772597U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119311A (en) * | 2015-07-30 | 2015-12-02 | 中国石油大学(北京) | Control system of oil pumping unit and control method |
-
2012
- 2012-09-14 CN CN 201220468267 patent/CN202772597U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119311A (en) * | 2015-07-30 | 2015-12-02 | 中国石油大学(北京) | Control system of oil pumping unit and control method |
| CN105119311B (en) * | 2015-07-30 | 2019-02-05 | 中国石油大学(北京) | The control system and its control method of pumping unit |
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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: 20130306 Termination date: 20200914 |
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| CF01 | Termination of patent right due to non-payment of annual fee |