CN202550911U - High-efficiency photovoltaic inverter - Google Patents
High-efficiency photovoltaic inverter Download PDFInfo
- Publication number
- CN202550911U CN202550911U CN 201220163735 CN201220163735U CN202550911U CN 202550911 U CN202550911 U CN 202550911U CN 201220163735 CN201220163735 CN 201220163735 CN 201220163735 U CN201220163735 U CN 201220163735U CN 202550911 U CN202550911 U CN 202550911U
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- array
- stepup transformer
- transformer
- direct current
- booster
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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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- Inverter Devices (AREA)
Abstract
The utility model discloses a high-efficiency photovoltaic inverter, which comprises a direct current step-up transformer array, a controller and a direct current-alternating current converter, wherein the output end of the direct current step-up transformer array is connected with the direct current-alternating current converter, and the input end of the direct current step-up transformer array is connected with a photovoltaic panel; one end of the controller is connected with the input end of the direct current step-up transformer array, and the other end of the controller is connected with the direct current-alternating current converter; and the direct current step-up transformer array comprises two or more than two step-up transformers which are connected in parallel. A plurality of step-up transformer units are used, each unit is operated only within a peak efficiency range thereof, and when power consumption is increased, more step-up transformers are started to make the power consumption of each step-up transformer unit within the peak efficiency range thereof, so that the efficiency of the inverter is improved, and the input voltage range of the inverter is widened to keep high efficiency.
Description
Technical field
The utility model relates to the solar-photovoltaic technology field, particularly a kind of high-efficiency photovoltaic solar inverter.
Background technology
Growing along with science and technology, energy crisis has become global crisis, and the excavation of renewable resource is the main method that solves energy problem with utilizing; And in the above-mentioned reproducible energy; Solar energy is a kind of efficient, reproducible energy, to the present situation that can alleviate energy scarcity greatly that makes full use of of solar energy, so the utilization of solar energy is occupied an leading position; In the photovoltaic sciemtifec and technical sphere, need usually to use inverter to convert solar energy to interchange from direct current.Many times, in inverter, direct current all need boost, and is changing into interchange then.In traditional inverter; In usefulness is one group of stepup transformer; This makes the efficient of stepup transformer only concentrate in the very little power bracket, and stepup transformer only has the conversion efficiency of peak efficiency usually in very little power bracket, left this scope; Conversion efficiency will be rapidly decline, the input range of inverter receives great restriction.
The utility model content
The shortcoming that the purpose of the utility model is to overcome prior art provides a kind of input range photovoltaic DC-to-AC converter wide, that efficient is high with not enough.
The purpose of the utility model realizes through following technical proposals:
A kind of high-efficiency photovoltaic inverter of the utility model; Comprise DC booster array, controller, DC-AC converter; The output of said DC booster array is connected with DC-AC converter, and the input of said stepup transformer array is connected with photovoltaic panel, and said controller one end connects the input of DC booster array; The other end connects direct current and exchanges converter, and said DC booster array comprises two or more parallel stepup transformers that connects.
Preferably, said stepup transformer has identical lane phase transfer, and the lane phase transfer between each unit is on average in being distributed in one-period.
Preferably, said stepup transformer is the autonomous stepup transformer that produces pulse signal.
Preferably, said stepup transformer is back to help transformer, inductance boost device or half-wave type stepup transformer.
Preferably, also comprise the measurement of power loss device of measuring stepup transformer output, said measurement of power loss device one end is connected with DC-AC converter with the DC booster array, and the other end is connected with controller.
The utility model has following advantage and effect with respect to prior art:
1, the utility model uses the multiple unit stepup transformer; Each unit is all only operated in its peak efficiency scope; The stepup transformer of more groups will start when power consumption increases; The power consumption of stepup transformer that makes every each unit improving the efficient of inverter, thereby improves the input voltage range of inverter and keeps high efficiency still in the peak efficiency scope.
2, the startup of each stepup transformer of the utility model and to close be by controller management; Controller can be by the data that current inductor measured; Calculate the stepup transformer that power consumption has determined to need to start plurality of units then; When not started as a unit or with many stepup transformers, controller can take turns starting the stepup transformer of different units, and the heat that stepup transformer is produced can be evenly distributed.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the circuit diagram of the stepup transformer of the utility model embodiment;
Fig. 3 is originally to be the pulse signal figure that the utility model different units produces;
Fig. 4 is the pulse signal figure after the utility model power consumption reduces.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but the execution mode of the utility model is not limited thereto.
Embodiment
Be illustrated in figure 1 as the structural representation of the utility model high-efficiency photovoltaic inverter; Comprise DC booster array 101, controller 401 and DC-AC converter 302; The output of said DC booster array 101 is connected with DC-AC converter 302; The input of said DC booster array 101 is connected with photovoltaic panel, and said controller 401 1 ends connect the input of DC booster array 101, and the other end connects direct current and exchanges converter 302; Said DC-AC converter 302 is connected with AC network, and said DC booster array 101 comprises two or more parallel stepup transformers 102 that connects.
The input of present embodiment is from the solar energy photovoltaic panel input direct voltage, and its magnitude of voltage is usually less than alternating voltage.So, just can convert interchange to after need boosting.Be different from conventional inverter, present embodiment has adopted DC booster array 101, and the DC booster array has the parallel stepup transformer 102 that connects in a plurality of unit for 101 li.The stepup transformer 102 of each unit all is an independently pulse control stepup transformer, but can 401 its startups of control of Be Controlled device and close.As shown in Figure 2, the stepup transformer 102 of each unit can be a flyback transformer, but is not restricted to flyback transformer.Any stepup transformer comprises the inductance boost device, even can be to produce the function that the half-wave type stepup transformer can realize that present embodiment is required.The stepup transformer 102 of each unit all only operates in its peak efficiency scope, and the stepup transformers of more groups will start when power consumption increases, and makes the power consumption of the stepup transformer of every each unit still be in the peak efficiency scope.Improving the efficient of inverter, thereby improve the input voltage range of inverter and keep high efficiency.
In addition, the stepup transformer 102 of each unit of present embodiment all is independently to produce pulse signal; As shown in Figure 3; The pulse signal that the stepup transformer of different units produces has different phase; The phase place of each unit all can have all phase shift, and the number of degrees that shift are the stepup transformer element number decisions that have in the array, and what the phase place of each unit was all average like this is distributed; If inverter has the unit of three stepup transformers, phase shifts will be 120 degree.
Each startup of 102 and to close be by controller 401 management of boosting, the data that control 401 can be measured by measurement of power loss device 301, and according to the stepup transformer of measured several each unit of power consumption data decision needs startup.When not started as a unit or with the stepup transformer of a plurality of unit, controller can take turns starting the stepup transformer of different units, and the heat that stepup transformer is produced can be evenly distributed.Like Fig. 4, when power consumption reduces, the stepup transformer that has a unit is quit work; In addition, controller also can be activated different unit in turn stepup transformer to reach uniform heat radiation.
Through after the above-mentioned conversion, the output of stepup transformer will be converted to direct current alternating current and be input to electrical network by DC-AC converter.
The foregoing description is the utility model preferred implementation; But the execution mode of the utility model is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit and the principle of the utility model, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within the protection range of the utility model.
Claims (5)
1. high-efficiency photovoltaic inverter; Comprise DC booster array, controller and DC-AC converter, the output of said DC booster array is connected with DC-AC converter, and the input of said stepup transformer array is connected with photovoltaic panel; Said controller one end connects the input of DC booster array; The other end connects direct current and exchanges converter, it is characterized in that, said DC booster array comprises two or more parallel stepup transformers that connects.
2. high-efficiency photovoltaic inverter according to claim 1 is characterized in that, said stepup transformer has identical lane phase transfer, and the lane phase transfer between each unit is on average in being distributed in one-period.
3. high-efficiency photovoltaic inverter according to claim 1 is characterized in that, said stepup transformer is the autonomous stepup transformer that produces pulse signal.
4. according to each said high-efficiency photovoltaic inverter among the claim 1-3, it is characterized in that said stepup transformer is back to help transformer, inductance boost device or half-wave type stepup transformer.
5. high-efficiency photovoltaic inverter according to claim 4 is characterized in that, also comprises the measurement of power loss device of measuring stepup transformer output, and said measurement of power loss device one end is connected with DC-AC converter with the DC booster array, and the other end is connected with controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220163735 CN202550911U (en) | 2012-04-17 | 2012-04-17 | High-efficiency photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220163735 CN202550911U (en) | 2012-04-17 | 2012-04-17 | High-efficiency photovoltaic inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202550911U true CN202550911U (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220163735 Expired - Fee Related CN202550911U (en) | 2012-04-17 | 2012-04-17 | High-efficiency photovoltaic inverter |
Country Status (1)
| Country | Link |
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| CN (1) | CN202550911U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103116383A (en) * | 2012-12-25 | 2013-05-22 | 深圳创动科技有限公司 | Two-way boost photovoltaic inverter and control method thereof |
-
2012
- 2012-04-17 CN CN 201220163735 patent/CN202550911U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103116383A (en) * | 2012-12-25 | 2013-05-22 | 深圳创动科技有限公司 | Two-way boost photovoltaic inverter and control method thereof |
| CN103116383B (en) * | 2012-12-25 | 2015-01-07 | 深圳创动科技有限公司 | Two-way boost photovoltaic inverter and control method thereof |
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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: 20121121 Termination date: 20190417 |
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| CF01 | Termination of patent right due to non-payment of annual fee |