CN204886211U - Power generation facility of microgrid - Google Patents
Power generation facility of microgrid Download PDFInfo
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- CN204886211U CN204886211U CN201520684246.5U CN201520684246U CN204886211U CN 204886211 U CN204886211 U CN 204886211U CN 201520684246 U CN201520684246 U CN 201520684246U CN 204886211 U CN204886211 U CN 204886211U
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- 238000010248 power generation Methods 0.000 title abstract description 15
- 238000004146 energy storage Methods 0.000 claims abstract description 24
- 230000001360 synchronised effect Effects 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 claims abstract description 5
- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 238000011084 recovery Methods 0.000 claims description 46
- 230000002441 reversible effect Effects 0.000 claims description 25
- 230000009467 reduction Effects 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000002457 bidirectional effect Effects 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 38
- 230000001172 regenerating effect Effects 0.000 description 8
- 230000002411 adverse Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/14—District level solutions, i.e. local energy networks
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- Control Of Eletrric Generators (AREA)
Abstract
The utility model provides a power generation facility of microgrid can improve the intermittent type formula renewable energy power generation facility's in the microgrid general assembling capacity to avoid bringing unfavorable influence to the steady operation of the outside electric wire netting rather than linking to each other. This power generation facility includes: the unit is caught to the energy, and it catches one or more intermittent type formula energy, motor drive, its is right the intermittent type formula energy is changed to export first voltage, the bidirectional transform ware, its with the motor drive electricity is connected to the control energy storage unit quilt the energy catch that the unit charges or to motor drive discharges, the energy storage unit, its with bidirectional transform ware electricity is connected, and can the quilt the energy catch that the unit charges or to motor drive discharges, the motor, its drag the synchronous generator operation under the effect of first voltage, synchronous generator, its under of the draging of motor, export the point of common coupling(PCC) for the microgrid with the electric energy of its production.
Description
Technical field
The utility model relates to electric power system, espespecially a kind of Blast Furnace Top Gas Recovery Turbine Unit (TRT) of microgrid.
Background technology
At present, microgrid can refer to be made up of one or more parts such as distributed power generation unit, energy conversion device, supervising device, protective device and associated loadings small-sized, join, using electricity system.Wherein, what is called is small-sized is little compared with the scale of mains network.Microgrid both can with external electrical network (such as mains network etc.) side by side/in parallel/be incorporated into the power networks, also can independent operating.Generally speaking, microgrid be one can teaching display stand control, the autonomous system of self-protection and self-management.
Blast Furnace Top Gas Recovery Turbine Unit (TRT) in microgrid generally has the polytype such as the first energy source electric generating device and the second energy source electric generating device.Wherein, the first energy source electric generating device adopts such as regenerative resource to drive, and this first energy source electric generating device can be implemented as batch (-type) renewable energy power generation device, adopts the such as batch (-type) such as photovoltaic or wind energy regenerative resource to drive; Second energy source electric generating device adopts such as traditional energy, the drivings such as such as coal, combustion gas, diesel oil, small-sized water power.Particularly, batch (-type) renewable energy power generation device is made up of energy capturing unit and power electronics energy conversion device, and conduct also net unit access microgrid.Wherein, power electronics energy conversion device can be such as converter (converter) or inverter (inverter) etc.Because batch (-type) regenerative resource has, energy density is low, large by weather and environmental influence, output-power fluctuation strong, be difficult to the features such as Accurate Prediction; total installed capacity of the batch (-type) renewable energy power generation device in microgrid can be restricted usually, to avoid bringing adverse influence to the stable operation of coupled external electrical network.
Utility model content
In view of this, the purpose of this utility model is total installed capacity of the batch (-type) renewable energy power generation device improved in microgrid, and avoids bringing adverse influence to the stable operation of coupled external electrical network.
To achieve these goals, the utility model provides a kind of Blast Furnace Top Gas Recovery Turbine Unit (TRT) of microgrid, comprising:
Energy capturing unit, it catches one or more intermittent energy;
Motor driver, it is changed described intermittent energy, and exports the first voltage;
Reversible transducer, it is electrically connected with described motor driver, and controls energy storage unit by the charging of described energy capturing unit or discharge to described motor driver;
Described energy storage unit, it is electrically connected with described reversible transducer, and by described energy capturing unit charging or can discharge to described motor driver;
Motor, it drags synchronous generator and runs under the effect of described first voltage;
Described synchronous generator, it is under the dragging of described motor, and the electric energy produced exports to the point of common coupling of microgrid.
The Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the microgrid provided by the utility model embodiment, by the energy supply of batch (-type) regenerative resource, drag synchronous generator again with converters drive motor to run, afterbody due to Energy transmission is synchronous generator, when self there is the transient wave of non-controlling target in the converters in this Blast Furnace Top Gas Recovery Turbine Unit (TRT), also can be absorbed by the dynamo-electric link of rear class, therefore, according to the Blast Furnace Top Gas Recovery Turbine Unit (TRT) of microgrid of the present utility model, there is the output external characteristic similar with conventional power plants, total installed capacity of the batch (-type) renewable energy power generation device in microgrid can be significantly improved, and the stable operation of external electrical network can eliminated it is connected brings adverse effect.
And, Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to microgrid of the present utility model comprises reversible transducer and energy storage unit further, by such structure, the voltage fluctuation of the converters in this Blast Furnace Top Gas Recovery Turbine Unit (TRT) can be stablized further, and improve the utilization ratio of regenerative resource.
Accompanying drawing explanation
Hereafter by clearly understandable mode by coming by reference to the accompanying drawings to be further described the utility model such scheme, technical characteristic, advantage and implementation thereof to the explanation of embodiment.
Fig. 1 shows the structural representation according to a kind of microgrid Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the present utility model;
Fig. 2 shows the structural representation according to the reversible transducer in embodiment one of the present utility model;
Fig. 3 shows the structural representation of the embodiment two according to microgrid Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the present utility model;
Fig. 4 shows the structural representation of the embodiment three according to microgrid Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the present utility model.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the utility model is further described.
Fig. 1 shows the Blast Furnace Top Gas Recovery Turbine Unit (TRT) of a kind of microgrid according to the utility model embodiment.As shown in Figure 1, the Blast Furnace Top Gas Recovery Turbine Unit (TRT) 10 of this microgrid comprises:
Energy capturing unit 11, it catches one or more intermittent energy;
Motor driver 12, it is changed described intermittent energy, and exports the first voltage;
Reversible transducer 13, it is electrically connected with described motor driver 12, and controls energy storage unit 14 and charged by described energy capturing unit 11 or discharge to described motor driver 12;
Energy storage unit 14, it is electrically connected with described reversible transducer 13, and can be charged by described energy capturing unit 11 or discharge to described motor driver 12;
Motor 15, it drags synchronous generator 16 and runs under the effect of described first voltage;
Synchronous generator 16, it is under the dragging of described motor 15, and the electric energy produced exports to external electrical network by the point of common coupling of microgrid.
According in specific embodiment of the utility model, energy capturing unit 11 can be used for capture photovoltaic batch (-type) regenerative resource.The energy caught can be converted into metastable direct voltage through motor driver 12 and the such power electronic controller of reversible transducer 13, and is provided to motor 15 according to the embodiment of motor 15 or is alternating voltage by further inversion.Motor 15 is for converting electric energy to mechanical energy, and in a particular application, motor can corresponding employing DC motor and alternating current motor by use power supply difference.Synchronous generator 16 is for converting mechanical energy to electric energy, and its rotor and stator rotate and keep synchronous speed.Motor 15 and synchronous generator 16 all can adopt existing various technical scheme to realize.During real work, the Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to the utility model embodiment can drive alternating current motor or DC motor, then drags synchronous generator operation, exports power frequency electric energy (output frequency is 50Hz or 60Hz).
The Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the microgrid provided by the utility model embodiment, by intermittent energy energy supply, drag synchronous generator again with converters drive motor to run, afterbody due to Energy transmission is synchronous generator, when self there is the transient wave of non-controlling target in the converters in this Blast Furnace Top Gas Recovery Turbine Unit (TRT), also can be absorbed by the dynamo-electric link of rear class, therefore, have and conventional power plants (such as small hydro generator according to the Blast Furnace Top Gas Recovery Turbine Unit (TRT) of microgrid of the present utility model, diesel engine generator etc.) similar output external characteristic, total installed capacity of the batch (-type) renewable energy power generation device in microgrid can be significantly improved, and the stable operation of external electrical network can eliminated it is connected brings adverse effect.
And, Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to microgrid of the present utility model comprises reversible transducer and energy storage unit further, by such structure, the voltage fluctuation of the converters in this Blast Furnace Top Gas Recovery Turbine Unit (TRT) can be stablized further, and improve the utilization ratio of regenerative resource.
In the specific implementation, energy storage unit such as can comprise lead acid accumulator, lithium battery, Ni-MH battery or other stored energy forms multiple, can also comprise the energy storage manager of the information for gathering this energy storage unit.
Fig. 2 shows the structural representation according to the reversible transducer in embodiment one of the present utility model.As shown in Figure 2, this reversible transducer 20 comprises storage battery side filter capacitor C1, DC bus side Support Capacitor C2, switch transistor T 1, diode D1 antiparallel with switch transistor T 1, switch transistor T 2, diode D2 antiparallel with switch transistor T 2, and the inductance L to match with C1 and C2, for periodically storing the energy on DC bus and discharging, to reach the effect of boosting or step-down.This reversible transducer 20 can be electrically connected with the DC bus of described motor driver, and can by energy storage to the batteries B1 on described DC bus, in this condition, this two way convertor 20 is used as reduction voltage circuit, switch transistor T 2 turns off all the time, switch transistor T 1 and the complementary break-make work of diode D2, diode D1 turns off all the time.Or, adopt this reversible transducer 20, can by the Energy transmission of batteries B1 to described DC bus, in this condition, this reversible transducer 20 is used as booster circuit, and switch transistor T 1 turns off all the time, switch transistor T 2 and the complementary break-make work of diode D1, diode D2 turns off all the time.
This shows, by arranging reversible transducer in the Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the utility model embodiment, when described DC bus overvoltage, described energy storage unit can be controlled the electric energy that described DC bus exports is stored; When described DC bus is under-voltage, controls described energy storage unit and export electric energy to described DC bus, thus make the voltage of described DC bus keep stable, eliminate the voltage fluctuation in described Blast Furnace Top Gas Recovery Turbine Unit (TRT).
It will be understood by those of skill in the art that the concrete structure of the described reversible transducer shown in Fig. 2 is only for illustrating, is not limited to this according to embodiment of the present utility model, such as, isolated two-way DC translation circuit can also be adopted to realize.
Corresponding to the concrete form of implementation of described energy capturing unit and described motor, described motor driver may be embodied as friendship orthogonal converter, and (described energy capturing unit is the renewable alternative electric generation unit such as wind power generation, described motor is alternating current motor), (described energy capturing unit is the renewable alternative electric generation unit such as wind power generation to AC-DC converter, described motor is DC motor), (described energy capturing unit is the renewable DC generation unit such as photovoltaic to inverter, described motor is alternating current motor) or DC dc converter (described energy capturing unit is the renewable DC generation unit such as photovoltaic, described motor is DC motor), caught energy conversion can be metastable direct voltage by it, and drive described motor further, thus convert electric energy to mechanical energy, run to drag described synchronous generator.
Fig. 3 shows the structural representation of the embodiment two according to microgrid Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the present utility model.As shown in Figure 3, comprise in this Blast Furnace Top Gas Recovery Turbine Unit (TRT) 30: energy capturing unit 31, motor driver 32, reversible transducer 33 and energy storage unit 34, see the related description of composition graphs 1, can not repeat them here about illustrating of these parts.Distinguish with embodiment illustrated in fig. 1, in this embodiment two, described Blast Furnace Top Gas Recovery Turbine Unit (TRT) 30 comprises transformer 37 further, and its first voltage transitions exported by described motor driver 32 is the second voltage, and is supplied to motor 35, to drag synchronous generator 36.Such as, described first boost in voltage is the second voltage by described transformer 37, to drive mesohigh alternating current motor 35, then drags synchronous generator 36.Described synchronous generator 36 is under the dragging of described motor 35, and the electric energy produced exports to electrical network.
Fig. 4 shows the structural representation of the embodiment three according to microgrid Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the present utility model.As shown in Figure 4, in this Blast Furnace Top Gas Recovery Turbine Unit (TRT) 40, energy capturing unit 41 can comprise multiple energy and catch branch road, such as, specifically comprises 3 photovoltaic generation branch roads 411 to 413; Motor driver 42 comprises Siemens BLM normal power module and Siemens MM motor module, wherein, BLM normal power module is charged to DC bus for utilizing the output of photovoltaic generation branch road 411 to 413, rectifier diode included by it can also play the effect of the anti-reverse charging of photovoltaic generation branch road, to be converted into metastable direct voltage, MM motor module is used for carrying out inversion to the voltage of DC bus, to drive alternating current motor 45.Illustrating of reversible transducer 43, energy storage unit 44, motor 45 and synchronous generator 46 see the related description of composition graphs 1 and Fig. 2, can not repeat them here.In this embodiment three, adopt multiple energy to catch branch road, the total power generating capacity of batch (-type) photovoltaic energy can be improved.
As a kind of distressed structure of embodiment illustrated in fig. 4 three, when to catch branch road be wind power generation branch road to described multiple energy, motor driver 42 can comprise Siemens ALM active power source module and Siemens MM motor module, to drive alternating current motor 45.
In addition, described motor 45 also can adopt DC motor, then described motor driver 42 can comprise Siemens DCM DC speed regulator, for converting the output of described photovoltaic generation branch road 411 to 413, to drive DC motor.More simply compact according to the grid generation apparatus structure of this distressed structure.
To carrying out active power regulation and reactive power adjustment respectively according to the Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the utility model embodiment, wherein, active power regulation is realized by described motor driver and corresponding control logic, to ensure the stable of mains frequency, reactive power is regulated and is realized by the exciter control system of described synchronous generator self, to ensure the stable of grid voltage amplitude.Concrete, for active power regulation, by gathering microgrid information (frequency, voltage magnitude etc. at such as microgrid point of common coupling place) in this control cycle, the running state information (such as armature voltage, electric current, rotor speed, Driving Torque etc.) of motor and energy-storage units information (such as voltage, electric current, temperature etc.), by corresponding control logic, provide the motor drive signal of next control cycle, thus reach the object that Blast Furnace Top Gas Recovery Turbine Unit (TRT) active power of output is regulated.Such as, the mains frequency of current time t1 rises to some extent compared with a upper moment t0, then pass through generated motor drive signal and reduce motor speed thus the mains frequency reducing subsequent time t2, to ensure the stable of electrical network.Regulate for reactive power, synchronous generator, by the judgement to grid voltage amplitude situation of change, regulates self exciting voltage, with the output voltage of control synchronization generator, thus reaches the object regulating Blast Furnace Top Gas Recovery Turbine Unit (TRT) output reactive power.
The Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to the utility model embodiment as can be seen from foregoing description:
1) Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the utility model embodiment adopts synchronous generator to complete Energy transmission, and the stability of a system of microgrid is strong, is convenient to power decoupled and controls.
2) Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the utility model embodiment has autosync, can realize easily multiple Blast Furnace Top Gas Recovery Turbine Unit (TRT) in parallel time input or exit, power system capacity expands convenient.
3) the Blast Furnace Top Gas Recovery Turbine Unit (TRT) afterbody of the utility model embodiment is dynamo-electric link, compared to the conventional power generation device that afterbody is power electronic device, the average uninterrupted operation time significantly improves, and annual hours of operation significantly improves, and annual energy output also significantly improves.
4), because dynamo-electric link exists, when the transient wave of non-controlling target self appears in the power electronic device in Blast Furnace Top Gas Recovery Turbine Unit (TRT), also can be absorbed by the dynamo-electric link of rear class, eliminate the impact this Blast Furnace Top Gas Recovery Turbine Unit (TRT) being exported to the quality of power supply.
5) Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the utility model embodiment is when setting up microgrid structure, has multiple compound mode flexibly.
6) based on the micro-grid system that the utility model embodiment constructs, significantly can improve the penetrate power capacity of regenerative resource in microgrid and limit (can 100% be reached theoretically), significantly reduce using and consuming of fossil energy, environmental benefit is good.
Those skilled in the art should understand that, although this specification describes according to each embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, technical scheme in each embodiment also through appropriately combined, can form other execution mode that it will be appreciated by those skilled in the art that.
The foregoing is only exemplifying embodiment, and be not used to limit scope of the present invention.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present invention and principle, amendment and combination, all should belong to the scope of protection of the invention.
Claims (8)
1. a Blast Furnace Top Gas Recovery Turbine Unit (TRT) for microgrid, is characterized in that, comprising:
Energy capturing unit, it catches one or more intermittent energy;
Motor driver, it is changed described intermittent energy, and exports the first voltage;
Reversible transducer, it is electrically connected with described motor driver, and controls energy storage unit by the charging of described energy capturing unit or discharge to described motor driver;
Described energy storage unit, it is electrically connected with described two way convertor, and by described energy capturing unit charging or can discharge to described motor driver;
Motor, it drags synchronous generator and runs under the effect of described first voltage;
Described synchronous generator, it is under the dragging of described motor, and the electric energy produced exports to the point of common coupling of microgrid.
2. Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to claim 1, is characterized in that, described motor driver is for handing over orthogonal converter, AC-DC converter, inverter or DC dc converter.
3. Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to claim 2, it is characterized in that, described reversible transducer is electrically connected with the DC bus of described motor driver, and controls described energy storage unit and store the electric energy that described DC bus exports or export electric energy to described DC bus.
4. Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to claim 3, is characterized in that, when described DC bus overvoltage, described reversible transducer controls described energy storage unit and stores the electric energy that described DC bus exports; When described DC bus is under-voltage, described reversible transducer controls described energy storage unit and exports electric energy to described DC bus.
5. Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to claim 4, is characterized in that, described reversible transducer control described energy storage unit the electric energy that described DC bus exports is stored time, described reversible transducer is reduction voltage circuit; When described reversible transducer controls described energy storage unit to described DC bus output electric energy, described reversible transducer is booster circuit.
6. the Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to any one of claim 1-5, is characterized in that, comprises further:
Transformer, its first voltage transitions exported by described motor driver is the second voltage, and is supplied to described motor.
7. the Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to any one of claim 1-5, is characterized in that, described energy capturing unit comprises three energy and catches branch road; Described motor driver comprises rectification module and motor module; Described motor is alternating current motor.
8. the Blast Furnace Top Gas Recovery Turbine Unit (TRT) according to any one of claim 1-5, is characterized in that, described energy capturing unit is photovoltaic array or wind-driven generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520684246.5U CN204886211U (en) | 2015-09-06 | 2015-09-06 | Power generation facility of microgrid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520684246.5U CN204886211U (en) | 2015-09-06 | 2015-09-06 | Power generation facility of microgrid |
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| CN204886211U true CN204886211U (en) | 2015-12-16 |
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| CN201520684246.5U Expired - Fee Related CN204886211U (en) | 2015-09-06 | 2015-09-06 | Power generation facility of microgrid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107645196A (en) * | 2016-07-21 | 2018-01-30 | 阿里巴巴集团控股有限公司 | Distributed uninterruptible power system |
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2015
- 2015-09-06 CN CN201520684246.5U patent/CN204886211U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107645196A (en) * | 2016-07-21 | 2018-01-30 | 阿里巴巴集团控股有限公司 | Distributed uninterruptible power system |
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Granted publication date: 20151216 |