CN102684297B - Solar power system and N+1 thereof back up power distribution control method - Google Patents
Solar power system and N+1 thereof back up power distribution control method Download PDFInfo
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- CN102684297B CN102684297B CN201210152029.2A CN201210152029A CN102684297B CN 102684297 B CN102684297 B CN 102684297B CN 201210152029 A CN201210152029 A CN 201210152029A CN 102684297 B CN102684297 B CN 102684297B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims description 10
- 230000007257 malfunction Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
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Abstract
The embodiment of the invention discloses a kind of solar power system and N+1 backup power distribution control method thereof, relate to technical field of solar, be conducive to the utilance improving the energy that solar cell produces, improve bulk supply efficiency and the stability of a system of solar power system, achieve the N+1 backup functionality of controller for solar.This solar power system, comprising: several solar cell; Each solar cell connects one for making described solar cell working at the controller for solar of the maximum power point of described solar cell, also comprises: controller for solar for subsequent use; Switch unit, for being connected to described controller for solar for subsequent use according to the control command received by solar cell switching.
Description
Technical field
The present invention relates to technical field of solar, particularly relate to a kind of solar power system and N+1 backup power distribution control method thereof.
Background technology
Because global non-renewable energy resources are day by day in short supply, various regenerative resource comes into one's own day by day, and at present, the application of the solar energy in regenerative resource is comparatively ripe, along with the further decline of solar cell price, the application prospect of solar cell is more and more wide.
The output characteristic of solar cell has nonlinear characteristic, its power output affects by the multiple of intensity of illumination, ambient temperature and load state, peak power output point can be operated in make solar cell, simultaneously in order to reduce system cost, improve entire system efficiency, in the power supply system for communications taking solar energy as the energy, a kind of common method is the generating voltage of detecting real-time solar cell, and follow the trail of ceiling voltage current value, solar cell is always worked near maximum power point.This process is called MPPT maximum power point tracking, MPPT maximum power point tracking controller for solar have output voltage stabilization, volume little, be convenient to safeguard and the advantage such as dilatation, make MPPT maximum power point tracking controller for solar become the mainstream technology of present stage solar energy development.
Inventor is realizing finding in process of the present invention, solar power system of the prior art provides electric energy by the combination of single or multiple MPPT maximum power point tracking controller for solar and solar cell to application system, wherein, MPPT maximum power point tracking controller for solar and solar battery group connect one to one, coupled solar cell peak power output point is followed the tracks of by MPPT maximum power point tracking controller for solar, when a MPPT maximum power point tracking controller for solar because fault can not use, the maximum power point of coupled solar cell cannot be followed the tracks of, the energy causing this solar cell to produce can not be fully utilized, reduce the utilance of the energy that solar cell produces, thus reduce the whole efficiency of solar power system.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of solar power system and N+1 thereof to back up power distribution control method, be conducive to the utilance improving the energy that solar cell produces, improve bulk supply efficiency and the stability of a system of solar power system, achieve the N+1 backup functionality of controller for solar.
For solving the problems of the technologies described above, solar power system of the present invention and fault handling method thereof adopt following technical scheme:
A kind of solar power system, comprising: several solar cell; Each solar cell connects one for making described solar cell working at the controller for solar of the maximum power point of described solar cell, also comprises:
Controller for solar for subsequent use;
Switch unit, for being connected to described controller for solar for subsequent use according to the control command received by solar cell switching.
The N+1 of solar power system backs up a power distribution control method, and described solar power system comprises: several solar cell; Each solar cell connects one for making described solar cell working at the controller for solar of the maximum power point of described solar cell, and the power distribution control method of described solar power system comprises:
Solar cell switching is connected to controller for solar for subsequent use according to the control command received by switch unit.
In the technical scheme of the present embodiment, described solar power system comprises: this solar power system comprises: several solar cell; Each solar cell connects one for making described solar cell working at the controller for solar of the maximum power point of described solar cell, also comprises: controller for solar for subsequent use; Switch unit, for being connected to described controller for solar for subsequent use according to the control command received by solar cell switching.This electricity generation system can improve the stability of the power output of solar power system, the utilance to the energy that solar cell produces can be improved, the whole efficiency of this solar power system can also be improved, achieve the N+1 backup functionality of controller for solar.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation one of the solar power system in the embodiment of the present invention;
Fig. 2 is the structural representation two of the solar power system in the embodiment of the present invention;
Fig. 3 is the flow chart one of the N+1 backup method of solar power system in the embodiment of the present invention;
Fig. 4 is the flowchart 2 of the N+1 backup method of solar power system in the embodiment of the present invention;
Fig. 5 is the flow chart 3 of the N+1 backup method of solar power system in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
The embodiment of the present invention provides a kind of solar power system, and as shown in Figure 1, this solar power system comprises: several solar cell; Each solar cell connects one for making described solar cell working at the controller for solar of the maximum power point of described solar cell, also comprises:
Controller for solar for subsequent use;
Switch unit, for being connected to described controller for solar for subsequent use according to the control command received by solar cell switching.
In the prior art, the controller for solar that solar cell described in each in solar power system is only corresponding with one connects, because controller for solar is more fragile, once controller for solar damages, because Intensity of the sunlight is unstable, with the impact of the solar cell that is connected of controller for solar damaged by the intensity of solar irradiation, export continual and steady power without the circuit of normal load or power consumption equipment, affect the circuit of load or the normal work of power consumption equipment.
In embodiments of the present invention, as shown in Figure 1, described solar power system comprises controller for solar for subsequent use and switch unit, when described switch unit receives control command, switch unit is according to control command, by the switch between the controller for solar of switch failure and the solar cell of correspondence thereof, (switch form comprises and is not limited to electromagnetic relay, metal-oxide layer-semiconductor-field-effect transistor, the various ways such as logic switch), the solar cell that the controller for solar of fault correspondence connects is connected on controller for solar for subsequent use, controller for solar for subsequent use is utilized to substitute the controller for solar of fault, ensure that solar electric power supply system can export continual and steady effective power, ensure that the circuit of the load of being powered by solar power system or the normal work of power consumption equipment.
Further, owing to usually having several even more than ten solar cell in a solar power system, can exactly the solar cell of correspondence be connected on controller for solar for subsequent use to make described switch unit, particularly, described switch unit carries out correct switching according to identifier entrained in control command, the solar cell that connect corresponding to the controller for solar of fault is connected on controller for solar for subsequent use, wherein, this identifier can be any identifier making described switch unit differentiate the required switch switched, identifier entrained in described control command also can be the identifier of the controller for solar of solar cell or fault.
Further, as shown in Figure 1, described solar power system also comprises:
Monitoring unit, for detecting the malfunction of each described controller for solar, when controller for solar fault being detected, exports control command to described switch unit.
In a specified context of the present embodiment, suppose that two-way switch is now electromagnetic relay, when the arbitrary controller for solar in described solar power system normally works, electromagnetic relay is in normally-closed contact, now the cathode output end of each solar cell is connected with the negative input of the corresponding controller for solar connected by corresponding electromagnetic relay, the cathode output end of each solar cell is connected with the electrode input end of the corresponding controller for solar connected by corresponding electromagnetic relay, the cathode output end of each controller for solar and the connection of-48 volts, the cathode output end of each controller for solar is connected with loop by corresponding electromagnetic relay.When wherein a certain controller for solar (such as controller for solar 1) fault, monitoring unit can detect rapidly the malfunction of controller for solar 1, inquire the identifier of the solar cell 1 be connected with described controller for solar 1, send the control command carrying the identifier of this solar cell 1 to described switch unit afterwards.
When described switch unit receive this carry the control command of the identifier of described solar cell 1 time, switch unit enters operating state, by disconnecting the electromagnetic relay between the cathode output end of described solar cell 1 and the electrode input end of controller for solar 1, and the electromagnetic relay disconnected between the cathode output end of described solar cell 1 and the negative input of controller for solar 1, two electromagnetic relays are made all no longer to be in normally-closed contact, at this moment, under the effect of described electromagnetic relay, the cathode output end of described solar cell 1 will be connected to the electrode input end of controller for solar for subsequent use, the cathode output end of described solar cell 1 will be connected to the negative input of controller for solar for subsequent use, make described solar power system can keep the situation of its normal power supply, the circuit or the power consumption equipment that are effectively continuously load are powered.
In addition, the annexation of described solar power system also can be shown in Fig. 2, with being distinguished as of Fig. 1, the cathode output end of each solar cell of Fig. 2 connects with corresponding controller for solar and controller for solar for subsequent use all the time, and be provided with switch between the cathode output end of each solar cell in Fig. 1 and the negative input of corresponding controller for solar, by diverter switch, the cathode output end of the solar cell originally connected with the negative input of corresponding controller for solar is connected to the negative input of controller for solar for subsequent use.
General, the rated output power of all controller for solar in same solar power system is all consistent, and namely the rated output power of described controller for solar for subsequent use is consistent with the rated output power of arbitrary controller for solar.
It should be noted that, the solar cell that the controller for solar of multiple fault correspondence connects can be connected to described controller for solar for subsequent use, the power that now described controller for solar for subsequent use exports is its specified power output simultaneously.
In addition, each solar cell and the controller for solar be directly connected are equivalent to multiple power supplys of load circuit, and in parallel between this multiple power supply.In another specified context of the embodiment of the present invention, when now the Intensity of the sunlight in (such as rainy weather, morning or at dusk etc. of one day) is more weak, the number of the photon of the sunlight received by each solar cell is well below the photon of the sunlight received by sunny weather, so the power output of same power supply when being now also significantly smaller than sunny based on the power output of the power supply of solar cell, load circuit now cannot obtain effective power required when normally working, so load circuit cannot normally work.
So described monitoring unit, also for when the real output of described controller for solar is less than or equal to the preset value of the real output of controller for solar, exports control command to described switch unit.
It should be noted that, the preset value of the real output of described controller for solar can be arranged according to actual conditions by relevant technologies personnel, general, and this preset value can between 20% to 30% of the rated output power of controller for solar.
When switch unit receives control command, namely represent that solar power system now cannot provide sufficient power output to described load circuit, load circuit cannot normally work, can normally work to make load circuit, switch unit is according to control command, the solar cell of correspondence is connected on controller for solar for subsequent use, particularly, switch unit switches according to identifier entrained in control command the controller for solar that solar cell is connected to, wherein, this identifier can be the solar cell or the hardware address of controller for solar that switch between solar cell and corresponding controller for solar or required switching connect, software address or other anyly make described switch unit identification, differentiate the identifier of solar cell.
Be connected to by multiple solar cell after on controller for solar for subsequent use, described controller for solar for subsequent use just can adjust total power output of multiple solar cell, and final output meets the power of the rated power of this solar power system.
General, the controller for solar mentioned in the present embodiment can be MPPT maximum power point tracking controller for solar, is the upgraded product of traditional solar charging/discharging controller.Maximum power points in MPPT maximum power point tracking controller for solar meeting real-time tracking solar panels, has given play to the maximum effect of solar panels.Voltage is higher, by maximal power tracing, just can export more electricity, thus improves charge efficiency.Theoretically, the solar power system of MPPT maximum power point tracking controller for solar is used can to improve 50% than traditional efficiency.
In the technical scheme of the present embodiment, described solar power system comprises: this solar power system comprises: several solar cell; Each solar cell connects one for making described solar cell working at the controller for solar of the maximum power point of described solar cell, also comprises: controller for solar for subsequent use; Switch unit, for being connected to described controller for solar for subsequent use according to the control command received by solar cell switching.This electricity generation system can improve the stability of the power output of solar power system, the utilance to the energy that solar cell produces can be improved, the whole efficiency of this solar power system can also be improved, achieve the N+1 backup functionality of controller for solar.
Embodiment two
The embodiment of the present invention provides a kind of power distribution control method of solar power system, and this solar power system comprises: several solar cell; Each solar cell connects one for making described solar cell working at the controller for solar of the maximum power point of described solar cell, and as shown in Figure 3, the power distribution control method of this solar power system comprises:
Solar cell switching is connected to controller for solar for subsequent use according to the control command received by step S101, switch unit.
In the prior art, the controller for solar that solar cell described in each in solar power system is only corresponding with one connects, because controller for solar is more fragile, once controller for solar damages, because Intensity of the sunlight is unstable, with the impact of the solar cell that is connected of controller for solar damaged by the intensity of solar irradiation, export continual and steady power without the circuit of normal load or power consumption equipment, affect the circuit of load or the normal work of power consumption equipment.
In embodiments of the present invention, as shown in Figure 3, described solar power system comprises controller for solar for subsequent use and switch unit, when described switch unit receives control command, switch unit is according to control command, by the switch between the controller for solar of switch failure and the solar cell of correspondence thereof, (switch form comprises and is not limited to electromagnetic relay, metal-oxide layer-semiconductor-field-effect transistor, the various ways such as logic switch), the solar cell that the controller for solar of fault correspondence connects is connected on controller for solar for subsequent use, controller for solar for subsequent use is utilized to substitute the controller for solar of fault, ensure that solar electric power supply system can export continual and steady effective power, ensure that the circuit of the load of being powered by solar power system or the normal work of power consumption equipment.
Further, owing to usually having several even more than ten solar cell in a solar power system, can exactly the solar cell of correspondence be connected on controller for solar for subsequent use to make described switch unit, particularly, described switch unit carries out correct switching according to identifier entrained in control command, the solar cell that connect corresponding to the controller for solar of fault is connected on controller for solar for subsequent use, wherein, this identifier can be any identifier making described switch unit differentiate the required switch switched, identifier entrained in described control command also can be the identifier of the controller for solar of solar cell or fault.
Further, as shown in Figure 4, before step S101, also comprise:
When step S201, monitoring unit detect controller for solar fault, export control command to described switch unit.
In a specified context of the present embodiment, suppose that two-way switch is now electromagnetic relay, when the arbitrary controller for solar in described solar power system normally works, electromagnetic relay is in normally-closed contact, now the cathode output end of each solar cell is connected with the negative input of the corresponding controller for solar connected by corresponding electromagnetic relay, the cathode output end of each solar cell is connected with the electrode input end of the corresponding controller for solar connected by corresponding electromagnetic relay, the cathode output end of each controller for solar and the connection of-48 volts, the cathode output end of each controller for solar is connected with loop by corresponding electromagnetic relay.When wherein a certain controller for solar (such as controller for solar 1) fault, monitoring unit can detect rapidly the malfunction of controller for solar 1, inquire the identifier of the solar cell 1 be connected with described controller for solar 1, send the control command carrying the identifier of this solar cell 1 to described switch unit afterwards.
When described switch unit receive this carry the control command of the identifier of described solar cell 1 time, switch unit enters operating state, by disconnecting the electromagnetic relay between the cathode output end of described solar cell 1 and the electrode input end of controller for solar 1, and the electromagnetic relay disconnected between the cathode output end of described solar cell 1 and the negative input of controller for solar 1, two electromagnetic relays are made all no longer to be in normally-closed contact, at this moment, under the effect of described electromagnetic relay, the cathode output end of described solar cell 1 will be connected to the electrode input end of controller for solar for subsequent use, the cathode output end of described solar cell 1 will be connected to the negative input of controller for solar for subsequent use, make described solar power system can keep the situation of its normal power supply, the circuit or the power consumption equipment that are effectively continuously load are powered.
In addition, the annexation of described solar power system also can be shown in Fig. 2, with being distinguished as of Fig. 1, the cathode output end of each solar cell of Fig. 2 connects with corresponding controller for solar and controller for solar for subsequent use all the time, and be provided with switch between the cathode output end of each solar cell in Fig. 1 and the negative input of corresponding controller for solar, by diverter switch, the cathode output end of the solar cell originally connected with the negative input of corresponding controller for solar is connected to the negative input of controller for solar for subsequent use.
General, the rated output power of all controller for solar in same solar power system is all consistent, and namely the rated output power of described controller for solar for subsequent use is consistent with the rated output power of arbitrary controller for solar.
It should be noted that, the solar cell that the controller for solar of multiple fault correspondence connects can be connected to described controller for solar for subsequent use, the power that now described controller for solar for subsequent use exports is its specified power output simultaneously.
In addition, each solar cell and the controller for solar be directly connected are equivalent to multiple power supplys of load circuit, and in parallel between this multiple power supply.In another specified context of the embodiment of the present invention, when now the Intensity of the sunlight in (such as rainy weather, morning or at dusk etc. of one day) is more weak, the number of the photon of the sunlight received by each solar cell is well below the photon of the sunlight received by sunny weather, so the power output of same power supply when being now also significantly smaller than sunny based on the power output of the power supply of solar cell, load circuit now cannot obtain effective power required when normally working, so load circuit cannot normally work.
So, as shown in Figure 5, before step S101, also comprise:
When step S301, described monitoring unit detect that the real output of controller for solar is less than or equal to the preset value of the real output of controller for solar, export control command to described switch unit.
It should be noted that, the preset value of the real output of described controller for solar can be arranged according to actual conditions by relevant technologies personnel, general, and this preset value can between 20% to 30% of the rated output power of controller for solar.
When switch unit receives control command, namely represent that solar power system now cannot provide sufficient power output to described load circuit, load circuit cannot normally work, can normally work to make load circuit, switch unit is according to control command, the solar cell of correspondence is connected on controller for solar for subsequent use, particularly, switch unit switches according to identifier entrained in control command the controller for solar that solar cell is connected to, wherein, this identifier can be the solar cell or the hardware address of controller for solar that switch between solar cell and corresponding controller for solar or required switching connect, software address or other anyly make described switch unit identification, differentiate the identifier of solar cell.
Be connected to by multiple solar cell after on controller for solar for subsequent use, described controller for solar for subsequent use just can adjust total power output of multiple solar cell, and final output meets the power of the rated power of this solar power system.
General, the controller for solar mentioned in the present embodiment can be MPPT maximum power point tracking controller for solar, is the upgraded product of traditional solar charging/discharging controller.Maximum power points in MPPT maximum power point tracking controller for solar meeting real-time tracking solar panels, has given play to the maximum effect of solar panels.Voltage is higher, by maximal power tracing, just can export more electricity, thus improves charge efficiency.Theoretically, the solar power system of MPPT maximum power point tracking controller for solar is used can to improve 50% than traditional efficiency.
In the technical scheme of the present embodiment, described solar power system method comprises: solar cell switching is connected to controller for solar for subsequent use according to the control command received by switch unit.This electricity generation system can improve the stability of the power output of solar power system, the utilance to the energy that solar cell produces can be improved, the whole efficiency of this solar power system can also be improved, achieve the N+1 backup functionality of controller for solar.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (8)
1. a solar power system, comprising: several solar cell; Each solar cell connects one for making described solar cell working at the controller for solar of the maximum power point of described solar cell, it is characterized in that, also comprises:
Controller for solar for subsequent use;
Monitoring unit, for detecting the malfunction of each described controller for solar, when controller for solar fault being detected, exports control command to described switch unit;
Switch unit, for solar cell switching being connected to described controller for solar for subsequent use according to the control command received, the rated output power of described controller for solar for subsequent use is consistent with the rated output power of arbitrary controller for solar, to ensure that solar electric power supply system can export continual and steady effective power.
2. solar power system according to claim 1, is characterized in that,
Described monitoring unit, also for when the real output of described controller for solar is less than or equal to the preset value of the real output of controller for solar, exports control command to described switch unit.
3. solar power system according to claim 1 and 2, is characterized in that,
Described control command carries the identifier of the solar cell that described controller for solar correspondence connects.
4. solar power system according to claim 3, is characterized in that,
Described controller for solar is MPPT maximum power point tracking controller for solar.
5. the N+1 of solar power system backs up a power distribution control method, and described solar power system comprises: several solar cell; Each solar cell connects one and it is characterized in that for making described solar cell working at the controller for solar of the maximum power point of described solar cell, and the power distribution control method of described solar power system comprises:
When monitoring unit detects controller for solar fault, export control command to described switch unit;
Solar cell switching is connected to controller for solar for subsequent use according to the control command received by switch unit, the rated output power of described controller for solar for subsequent use is consistent with the rated output power of arbitrary controller for solar, to ensure that solar electric power supply system can export continual and steady effective power.
6. method according to claim 5, is characterized in that, also comprises:
When described monitoring unit detects that the real output of controller for solar is less than or equal to the preset value of the real output of controller for solar, export control command to described switch unit.
7. the method according to claim 5 or 6, is characterized in that,
Described control command carries the identifier of the solar cell that described controller for solar correspondence connects.
8. method according to claim 7, is characterized in that,
Described controller for solar is MPPT maximum power point tracking controller for solar.
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| TWI565222B (en) * | 2015-07-03 | 2017-01-01 | 碩天科技股份有限公司 | Solar power generation system having a backup inverter |
| CN108931973B (en) * | 2018-08-01 | 2020-02-21 | 珠海格力电器股份有限公司 | Photovoltaic control system, and control method and device of photovoltaic control system |
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| CN102167260A (en) * | 2010-11-30 | 2011-08-31 | 大连华锐股份有限公司 | Fault redundancy protection system and method for variable frequency speed regulation of ladle crane |
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| JP3656531B2 (en) * | 2000-08-31 | 2005-06-08 | 松下電工株式会社 | Solar power system |
| JP4763660B2 (en) * | 2007-06-28 | 2011-08-31 | 日本電信電話株式会社 | Power system |
| FR2961035B1 (en) * | 2010-06-04 | 2013-09-20 | Aeg Power Solutions Bv | MATRIX CONNECTION DEVICE FOR PHOTOVOLTAIC PANELS AND / OR WIND TURBINES |
| CN102237690A (en) * | 2010-12-30 | 2011-11-09 | 保定天威集团有限公司 | Method for improving overall efficiency of photovoltaic inverter system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102013841A (en) * | 2009-09-04 | 2011-04-13 | 华为技术有限公司 | Power supply system, method and device of solar battery |
| CN201528223U (en) * | 2009-10-13 | 2010-07-14 | 青岛经济技术开发区创统科技发展有限公司 | Multi-power supply complementary power supply unit |
| CN102167260A (en) * | 2010-11-30 | 2011-08-31 | 大连华锐股份有限公司 | Fault redundancy protection system and method for variable frequency speed regulation of ladle crane |
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