CN204144968U - Be suitable for the photovoltaic power generation grid-connecting inversion control device of well site of oil field - Google Patents
Be suitable for the photovoltaic power generation grid-connecting inversion control device of well site of oil field Download PDFInfo
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- CN204144968U CN204144968U CN201420601485.5U CN201420601485U CN204144968U CN 204144968 U CN204144968 U CN 204144968U CN 201420601485 U CN201420601485 U CN 201420601485U CN 204144968 U CN204144968 U CN 204144968U
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- inverter
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model relates to a kind of photovoltaic power generation grid-connecting inversion control device being suitable for well site of oil field, this inversion control device comprises: photovoltaic power generation apparatus, and the automatic equalization control inverter to be connected with the grid-connection converter in this photovoltaic power generation apparatus, the three-phase output end of described automatic equalization control inverter is connected with well site of oil field load; Wherein, described automatic equalization control inverter, it is suitable for the electrical network three-phase electricity of access to be converted to VD U
0, and by this VD U
0with the VD U of described grid-connection converter
1compare, the input voltage using the output voltage selecting magnitude of voltage high as three-phase inverter in described automatic equalization control inverter.The utility model achieves the output electric energy of photovoltaic power generation apparatus and the grid-connected and auto-adjustment control of civil power by automatic equalization control inverter, ensure that three-phase inverter obtains best input voltage, to improve the power output of three-phase inverter.
Description
Technical field
The utility model relates to a kind of technical field of photovoltaic power generation, particularly a kind of photovoltaic power generation grid-connecting inversion control device being suitable for well site of oil field.
Background technology
After 20 century 70s, along with the development of modern industry, global energy crisis and atmosphere polluting problem become increasingly conspicuous, and traditional fossil fuel energy reduces day by day, become increasingly conspicuous to the harm that environment causes.Regenerative resource has all been invested sight in the whole world, wishes that regenerative resource can change the energy resource structure of the mankind, maintains long-range sustainable development, and wherein solar energy becomes the focus that people pay attention to its exclusive advantage.Abundant solar energy is the energy that inexhaustible, nexhaustible, pollution-free, cheap, the mankind can freely utilize.Solar energy arrives the energy on ground each second up to 800,000 kilowatt hours, if the solar energy of earth surface 0.1% is transferred to electric energy, number turnover 5%, every annual energy output can reach 5.6 × 1012 kilowatt-hours, is equivalent to 40 times of energy consumption in the world.Just because of these unique advantages of solar energy, after 2000, the range of application of solar energy power generating is day by day wide, market scale also progressively expands.
Oil extraction system (mainly pumping-unit motor) is as the maximum productive power system in oil field, and within its year, power consumption accounts for 56% of oil field total electricity consumption.There is the un-reasonable phenomenon of " low load with strong power " in the motor coupling of oil pumper, oil pumper existence is partly dragged for or sky drags for phenomenon, and motor load rate is general lower, and when therefore oil pumper runs, power factor is very low, and energy loss is serious.
In prior art, China Patent No. 201120440071.5, Authorization Notice No. CN 202309101 U, the utility model patent of " oil field distribution type photovoltaic power generation device " in authorized announcement date on July 4th, 2014 discloses a kind of oil field distribution type photovoltaic power generation device, it mainly adopts the technological maheup oil field distribution type photovoltaic power generation devices such as distributed power generation, common DC bus many inversions alternating current machine electric-generating feedback power supply capacity is shared, the observing and controlling of common DC bus electric energy balance, super capacitor energy-storage, although can meet the needs of oil field photovoltaic generation, power supply; But this technical scheme does not consider the output electric energy of photovoltaic power generation apparatus and the grid-connected and auto-adjustment control of civil power, to improve the problem of the power output of three-phase inverter, causes the power output of this technical scheme lower, affects the normal work of described oil pumper.
Utility model content
The purpose of this utility model is to provide a kind of photovoltaic power generation grid-connecting inversion control device being suitable for well site of oil field, this inversion control device is by by the output electric energy of photovoltaic power generation apparatus and the grid-connected and auto-adjustment control of civil power, ensure that three-phase inverter obtains best input voltage, to improve the power output of three-phase inverter.
The purpose of this utility model is achieved in that a kind of photovoltaic power generation grid-connecting inversion control device being suitable for well site of oil field, comprise: photovoltaic power generation apparatus, and the automatic equalization control inverter to be connected with the grid-connection converter in this photovoltaic power generation apparatus, the three-phase output end of described automatic equalization control inverter is connected with well site of oil field load; Wherein, described automatic equalization control inverter, it is suitable for the electrical network three-phase electricity of access to be converted to VD U
0, and by this VD U
0with the VD U of described grid-connection converter
1compare, the input voltage using the output voltage selecting magnitude of voltage high as three-phase inverter in described automatic equalization control inverter.
The utility model achieves the output electric energy of photovoltaic power generation apparatus and the grid-connected and auto-adjustment control of civil power by automatic equalization control inverter, ensure that three-phase inverter obtains best input voltage, to improve the power output of three-phase inverter.
Preferably, the technical problem that the grid-connected and output voltage in auto-adjustment control of output electric energy and civil power in order to solve photovoltaic power generation apparatus further switches; Described automatic equalization control inverter comprises: main control module, and the control output end of this main control module is connected with the control end of each switching tube in described three-phase inverter; And input channel selection circuit, it comprises: be suitable for first, second switching tube connecting two output voltages respectively; Described main control module is suitable for VD U
0with VD U
1compare, connect switching tube conducting with the output voltage selecting magnitude of voltage high, input to described three-phase inverter afterwards after filtering to make this output voltage.VD U is achieved by first, second switching tube and main control module
0and U
1switching, have that circuit is simple, the advantage of good reliability.
Preferably, in order to make the power output of this inverse control system maximize further; Described automatic equalization control inverter comprises: be suitable for three-phase electricity to be converted to described VD U
0three phase rectifier module, and first, second current sensor that is connected with the output of described three phase rectifier module, three-phase inverter respectively, the signals collecting end of described main control module is connected with the signal output part of first, second current sensor described; Described main control module is also suitable for the phase induced current gathered respectively according to the first current sensor or the second current sensor, export corresponding modulation signal, realizing reducing the frequency exporting three-phase voltage when exporting high load capacity to control three-phase inverter, improving the frequency exporting three-phase voltage when exporting underload.Exported the frequency of three-phase voltage by electric current adjustment, power output is better regulated, controls, keep the maximization of power output.
Optionally, described photovoltaic power generation apparatus comprises: the photovoltaic battery matrix be connected with grid-connection converter and storage battery, to realize, when photovoltaic battery matrix output voltage is on the low side, utilizes storage battery to meet grid-connection converter and normally exporting.
Accompanying drawing explanation
Fig. 1 is theory diagram one of the present utility model;
Fig. 2 is theory diagram two of the present utility model;
Fig. 3 is theory diagram three of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
For the sake of clarity, the photovoltaic power generation grid-connecting inversion control device being suitable for well site of oil field described in can referred to as inversion control device.
Fig. 1 shows the theory diagram one of described inversion control device.
As shown in Figure 1, a kind of photovoltaic power generation grid-connecting inversion control device being suitable for well site of oil field, comprise: photovoltaic power generation apparatus, and the automatic equalization control inverter to be connected with the grid-connection converter in this photovoltaic power generation apparatus, the three-phase output end of described automatic equalization control inverter is connected with well site of oil field load; Wherein, described automatic equalization control inverter, it is suitable for the electrical network three-phase electricity of access to be converted to VD U
0, and by this VD U
0with the VD U of described grid-connection converter
1compare, the input voltage using the output voltage selecting magnitude of voltage high as three-phase inverter in described automatic equalization control inverter.Grid-connection converter is dc-dc.
Wherein, described well site of oil field load includes but not limited to oil pumper, is specially the motor of this oil pumper.
Fig. 2 shows the theory diagram two of described inversion control device.
As shown in Figure 2, described automatic equalization control inverter comprises: main control module, and the control output end of this main control module is connected with the control end of each switching tube in described three-phase inverter; And input channel selection circuit, it comprises: be suitable for first, second switching tube connecting two output voltages respectively; Described main control module is suitable for VD U
0with VD U
1compare, connect switching tube conducting with the output voltage selecting magnitude of voltage high, input to described three-phase inverter afterwards after filtering to make this output voltage.Described main control module adopts but is not limited to, such as TMS320 series DSP chip.First, second switching tube described can adopt but be not limited to metal-oxide-semiconductor, NPN triode.In described three-phase inverter, each switching tube can adopt but be not limited to igbt transistor.
Optionally, described VD U
1with described VD U
0compare, by described VD U
1in be greater than VD U
0voltage segment be converted to pulse voltage; If when there is described pulse voltage, then described three-phase inverter obtains VD U from photovoltaic power generation apparatus
1; If when there is not described pulse voltage, then described three-phase inverter obtains VD U
0.When illumination is sufficient, the duty ratio of described pulse voltage is high.
Described automatic equalization control inverter comprises: being suitable for three-phase electricity being converted to described VD is U
0three phase rectifier module, and first, second current sensor that is connected with the output of described three phase rectifier module, three-phase inverter respectively, the signals collecting end of described main control module is connected with the signal output part of first, second current sensor described; Described main control module is also suitable for the phase induced current gathered respectively according to the first current sensor or the second current sensor, export corresponding modulation signal, realizing reducing the frequency exporting three-phase voltage when exporting high load capacity to control three-phase inverter, improving the frequency exporting three-phase voltage when exporting underload.Wherein, operationally, the load of its up-down stroke is different to described oil pumper, just because of load is different, namely causes the output load of described inverse control system different; Equally, the difference of load also causes the supply current of the output of described three phase rectifier module or three-phase inverter different, gather the change by this supply current, judge the change of load, the i.e. corresponding modulation signal of described master control module controls, this modulation signal is SPWM signal, regulates its modulation degree can change the duty ratio of SPWM signal, thus plays the effect of regulation output electric voltage frequency.Described automatic equalization control inverter is suitable for being supplied to the maximum power output of oil pumper.
Described photovoltaic power generation apparatus comprises: the photovoltaic battery matrix be connected with grid-connection converter.Described photovoltaic battery matrix is installed on well site of oil field, time by day, solar energy is converted to photovoltaic electric energy and is supplied to grid-connection converter.
Fig. 3 shows the theory diagram three of described inversion control device.
As shown in Figure 3, optionally, described grid-connection converter is also connected with storage battery.Need supporting installation batteries according to scene, unnecessary photovoltaic electric energy can be stored in batteries by grid-connection converter.
When cloudy day or night, photovoltaic battery matrix cannot provide enough electric energy, and the electric energy be stored in batteries can be supplied to automatic equalization control inverter by grid-connection converter.If the electric energy stored in batteries is too low, grid-connection converter cannot provide enough electric energy to automatic equalization control inverter, and automatic equalization control inverter can from utility grid electric energy supplement, and this part electric energy can by electricity-measuring meter metering examination.
The utility model is not limited to above-described embodiment; on the basis of technical scheme disclosed in the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some to some technical characteristics wherein to replace and distortion, these are replaced and are out of shape all in protection range of the present utility model.
Claims (4)
1. one kind is suitable for the photovoltaic power generation grid-connecting inversion control device of well site of oil field, it is characterized in that, comprise: photovoltaic power generation apparatus, and the automatic equalization control inverter to be connected with the grid-connection converter in this photovoltaic power generation apparatus, the three-phase output end of described automatic equalization control inverter is connected with well site of oil field load; Wherein,
Described automatic equalization control inverter, it is suitable for the electrical network three-phase electricity of access to be converted to VD U
0, and by this VD U
0with the VD U of described grid-connection converter
1compare, the input voltage using the output voltage selecting magnitude of voltage high as three-phase inverter in described automatic equalization control inverter.
2. the photovoltaic power generation grid-connecting inversion control device being suitable for well site of oil field according to claim 1, is characterized in that,
Described automatic equalization control inverter comprises: main control module, and the control output end of this main control module is connected with the control end of each switching tube in described three-phase inverter; And
Input channel selection circuit, it comprises: be suitable for first, second switching tube connecting two output voltages respectively;
Described main control module is suitable for VD U
0with VD U
1compare, connect switching tube conducting with the output voltage selecting magnitude of voltage high, input to described three-phase inverter afterwards after filtering to make this output voltage.
3. the photovoltaic power generation grid-connecting inversion control device being suitable for well site of oil field according to claim 2, is characterized in that,
Described automatic equalization control inverter comprises: be suitable for three-phase electricity to be converted to described VD U
0three phase rectifier module, and first, second current sensor that is connected with the output of described three phase rectifier module, three-phase inverter respectively, the signals collecting end of described main control module is connected with the signal output part of first, second current sensor described;
Described main control module is also suitable for the phase induced current gathered respectively according to the first current sensor or the second current sensor, export corresponding modulation signal, realizing reducing the frequency exporting three-phase voltage when exporting high load capacity to control three-phase inverter, improving the frequency exporting three-phase voltage when exporting underload.
4. the photovoltaic power generation grid-connecting inversion control device being suitable for well site of oil field according to claim 3, is characterized in that,
Described photovoltaic power generation apparatus comprises: the photovoltaic battery matrix be connected with grid-connection converter and storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420601485.5U CN204144968U (en) | 2014-10-17 | 2014-10-17 | Be suitable for the photovoltaic power generation grid-connecting inversion control device of well site of oil field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420601485.5U CN204144968U (en) | 2014-10-17 | 2014-10-17 | Be suitable for the photovoltaic power generation grid-connecting inversion control device of well site of oil field |
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| Publication Number | Publication Date |
|---|---|
| CN204144968U true CN204144968U (en) | 2015-02-04 |
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| CN201420601485.5U Expired - Fee Related CN204144968U (en) | 2014-10-17 | 2014-10-17 | Be suitable for the photovoltaic power generation grid-connecting inversion control device of well site of oil field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2014
- 2014-10-17 CN CN201420601485.5U patent/CN204144968U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| 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: 20150204 Termination date: 20151017 |
|
| EXPY | Termination of patent right or utility model |