CN202906777U - Photovoltaic inverter unit and three-phase photovoltaic inverter device - Google Patents
Photovoltaic inverter unit and three-phase photovoltaic inverter device Download PDFInfo
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- CN202906777U CN202906777U CN 201220540546 CN201220540546U CN202906777U CN 202906777 U CN202906777 U CN 202906777U CN 201220540546 CN201220540546 CN 201220540546 CN 201220540546 U CN201220540546 U CN 201220540546U CN 202906777 U CN202906777 U CN 202906777U
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- inversion unit
- photovoltaic inversion
- unit according
- electrically connected
- photovoltaic
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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 discloses a photovoltaic inverter unit, comprising a capacitor unit and a heat radiation unit. The capacitor unit comprises an upper fixing box, a plurality of DC capacitors arranged in the interior of the upper fixing box, and laminated buses electrically connected with the plurality of DC capacitors. The heat radiation unit comprises a lower fixing box connected with the upper fixing box detachably, radiating fins arranged in the interior of the lower fixing box, a plurality of independent and shunt-wound switch devices, driving plates electrically connected with the plurality of independent switch devices, an AC outgoing line bar electrically connected with the driving plates and a first insulating plate arranged between the switch devices and the radiating fins, and the switch devices correspond to the DC capacitors. A three-phase photovoltaic inverter device comprises three photovoltaic inverter units, and each photovoltaic inverter unit is connected with one of three phase circuits.
Description
Technical field
The utility model relates to a kind of photovoltaic inversion unit.
Background technology
Along with socioeconomic development, the continuous exploitation of the energy is progressively deepened global environmental pollution, and existing resource is also in continuous minimizing simultaneously.Therefore, human beginning developing green new forms of energy.Prove that through a large amount of research experiments solar energy is a kind of inexhaustible green novel energy source, and be not subjected to regional limits, energy conversion efficiency is very high.So it is subjected to people's favor deeply, especially utilize solar power generation.Yet what photovoltaic array was exported all is direct current, and is mostly alternating current in the practical application, so need a kind of copped wave inversion transformation technique (SPWM), realizes that direct current becomes interchange.At present, many employing three phase full bridges integrated design in medium-and-large-sized photovoltaic inversion, namely integrated integral units such as all power devices, electric capacity, radiator, stacked bus can bring volume large thus; The cabinet utilance is low; It is inhomogeneous to dispel the heat; Hand over straight/stream side current imbalance; Stray inductance is large on the stacked bus; Operating mode to equipment has certain requirement, and simultaneously whole unit is heavier, and volume is large, is unfavorable for enhancing productivity, installation and maintenance.
Traditional photovoltaic inversion unit volume is large and weigh, and it is inhomogeneous dispel the heat, hands over directly/flow on side current imbalance and the stacked bus stray inductance large.
Summary of the invention
The purpose of this utility model will provide a kind of photovoltaic inversion unit, small volume and good heat dissipation exactly.
The technical solution of the utility model has provided a kind of photovoltaic inversion unit, it is characterized in that: it comprises capacitor cell and heat-sink unit, described capacitor cell comprises fixed bin, be arranged at a plurality of dc capacitors of fixed bin inside, the stacked bus that is electrically connected mutually with a plurality of dc capacitors, described heat-sink unit comprises the lower fixed bin that removably is connected with the fixed box, be arranged at the fin of lower fixed bin inside, a plurality of switching devices discrete and in parallel, the drive plate that is electrically connected mutually with a plurality of discrete switching devices, exchange outlet row with described drive plate is electrically connected mutually, be arranged on the first insulation board between described switching device and the described fin, described switching device is corresponding with described dc capacitor.
[0006] preferably, it comprises that also one is arranged on the blower fan on the lower fixed bin.
Preferably, described capacitor cell adopts modular combination.
Preferably, described heat-sink unit adopts modular combination.
Preferably, described switching device is a plurality of little current switches.
Preferably, described capacitor cell is himself short-axis direction Central Symmetry relatively, and described heat-sink unit is himself short-axis direction Central Symmetry relatively.
Preferably, offer pod apertures on the described interchange outlet row.
A kind of three-phase photovoltaic inverter, it comprises three photovoltaic inversion units, wherein one tunnel being connected in each photovoltaic inversion unit and the three-phase electricity.
The utility model adopts above structure, has the following advantages:
1, the photovoltaic inversion unit adopts modularized design, and volume is little, and it is even and effective to dispel the heat;
2, adopt the discrete parallel connection of switching device of a plurality of little electric currents, focus is disperseed, heat radiation evenly makes radiator diminish simultaneously;
3, exchange outlet row and have pod apertures, reached the effect of current-sharing.
Description of drawings
Accompanying drawing 1 is the vertical view of photovoltaic inversion unit in the present embodiment.
Accompanying drawing 2 is the blast structural representation of photovoltaic inversion unit in the present embodiment.
Accompanying drawing 3 is the vertical view of switching device in the present embodiment.
Accompanying drawing 4 is the vertical view of stacked bus in the present embodiment.
Accompanying drawing 5 is the structural representation that exchanges outlet row in the present embodiment.
Accompanying drawing 6 is the structural representation of three-phase photovoltaic inverter in the present embodiment.
In the accompanying drawing: 1, upper fixed bin; 2, dc capacitor; 3, positive electrode bus; 4, the second insulation board; 5, negative busbar; 6, the first insulation board; 7, fin; 8, lower fixed bin; 9, switching device; 10, exchange outlet row; 101, pod apertures; 11, blower fan; 12, drive plate.
Embodiment
Shown in attached Fig. 1 and 2, a kind of photovoltaic inversion unit, it comprises capacitor cell and heat-sink unit.
As shown in Figure 2, the agent structure of capacitor cell is made of upper fixed bin 1.The inside of upper fixed bin 1 is provided with a plurality of dc capacitors 2 and stacked bus.A plurality of dc capacitors 2 are vertically placed.The bottom of lower fixed bin 8 is provided with stacked bus.As shown in Figure 4, the horizontal and a plurality of dc capacitors 2 of stacked bus are electrically connected mutually.Stacked bus is three layers, and the ground floor of stacked placement from top to bottom is positive electrode bus 3, and the second layer is that 4, the three layers of the second insulation boards are negative busbar 5.
The agent structure of heat-sink unit is made of lower fixed bin 8.Lower fixed bin 8 can with upper 1 mutually dismountable connection of fixed bin.The inside of lower fixed bin 8 is provided with fin 7, and the top of lower fixed bin 8 is provided with and exchanges outlet row 10, a plurality of switching device 9, drive plate 12.As shown in Figure 3, a plurality of switching device 9 discrete settings that are in parallel, and each switching device 9 is corresponding one by one mutually with dc capacitor 2.Switching device 9 evenly distributes with dc capacitor 2, and the main power device in this inversion unit is by switching device 9 discrete being formed in parallel of a plurality of little electric currents, and described switching device is corresponding with described dc capacitor.Realized the purpose of middle high-power inverter, especially, changed original focus and concentrated, the heat radiation hard problem, now discrete switching device 9 parallel connections of a plurality of little electric currents disperse focus, and heat radiation evenly makes radiator diminish simultaneously.As shown in Figure 5, exchange on the outlet row 10 and offer pod apertures 101, can reach the effect of current-sharing.Between fin 7 and switching device 9, be provided with the first insulation board 6.
Stacked bus positive pole is away from switching device 9, and negative pole is near switching device 9.Anodal upper, negative pole under arrangement principle, lowered the inductance coefficent of stacked bus, reduced impedance, lower pressure drop, reduce due to voltage spikes to the infringement of original paper.
The bottom of lower fixed bin 8 also is provided with blower fan 11, and this blower fan 11 can further dispel the heat to this inversion unit.Blower fan 11 adopts forced air cooling to realize the heat loss through convection of this inversion unit.
Capacitor cell and heat-sink unit all adopt modular combination, and after the modularization, the volume of these two unit obviously diminishes, and is convenient to production operation and maintenance.
As shown in Figure 6, the three-phase photovoltaic inverter comprises three photovoltaic inversion units, wherein one tunnel being connected in each photovoltaic inversion unit and the three-phase electricity.Each inversion unit is a single-phase semi-bridge, forms a three phase full bridge, controls discrete switching device 9 by driver module, realizes that the direct current of photovoltaic array input is transformed into the three-phase alternating current that is connected to the grid.
The utility model adopts above structure, has the following advantages:
1, the photovoltaic inversion unit adopts modularized design, and volume is little, and it is even and effective to dispel the heat;
2, adopt the switching device 9 discrete parallel connections of a plurality of little electric currents, focus is disperseed, heat radiation evenly makes radiator diminish simultaneously;
3, exchange outlet row 10 and have pod apertures 101, reached the effect of current-sharing.
More than specific embodiment of the present invention is illustrated in conjunction with diagram; but protection content of the present invention is not only limited to above embodiment, in affiliated technical field of the present invention, and the common knowledge of a GPRS; just can in its technology main idea scope, carry out diversified change.
Claims (10)
1. photovoltaic inversion unit, it is characterized in that: it comprises capacitor cell and heat-sink unit, described capacitor cell comprises fixed bin, be arranged at a plurality of dc capacitors of fixed bin inside, the stacked bus that is electrically connected mutually with a plurality of dc capacitors, described heat-sink unit comprises the lower fixed bin that removably is connected with the fixed box, be arranged at the fin of lower fixed bin inside, a plurality of switching devices discrete and in parallel, the drive plate that is electrically connected mutually with a plurality of discrete switching devices, exchange outlet row with described drive plate is electrically connected mutually, be arranged on the first insulation board between described switching device and the described fin, described switching device is corresponding with described dc capacitor.
2. photovoltaic inversion unit according to claim 1, it is characterized in that: it comprises that also one is arranged on the blower fan on the lower fixed bin.
3. photovoltaic inversion unit according to claim 1 is characterized in that: described capacitor cell employing modular combination.
4. photovoltaic inversion unit according to claim 1 is characterized in that: described heat-sink unit employing modular combination.
5. photovoltaic inversion unit according to claim 1, it is characterized in that: described switching device is a plurality of little current switches.
6. photovoltaic inversion unit according to claim 1 is characterized in that: described capacitor cell is himself short-axis direction Central Symmetry relatively, and described heat-sink unit is himself short-axis direction Central Symmetry relatively.
7. photovoltaic inversion unit according to claim 1 is characterized in that: offer pod apertures on the described interchange outlet row.
8. photovoltaic inversion unit according to claim 1, it is characterized in that: described stacked bus comprise positive electrode bus that the positive pole with dc capacitor is electrically connected mutually, and the negative busbar that is electrically connected mutually of the negative pole of dc capacitor and be arranged on described positive electrode bus and described negative busbar between the second insulation board, described positive electrode bus, described the second insulation board and the mutually stacked setting of described negative busbar.
9. photovoltaic inversion unit according to claim 1, it is characterized in that: a plurality of dc capacitors and a plurality of switching device evenly distribute.
10. three-phase photovoltaic inverter, it is characterized in that: it comprises three such as the described photovoltaic inversion unit of one of claim 1 to 9, wherein one tunnel being connected in each photovoltaic inversion unit and the three-phase electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220540546 CN202906777U (en) | 2012-10-22 | 2012-10-22 | Photovoltaic inverter unit and three-phase photovoltaic inverter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220540546 CN202906777U (en) | 2012-10-22 | 2012-10-22 | Photovoltaic inverter unit and three-phase photovoltaic inverter device |
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| Publication Number | Publication Date |
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| CN202906777U true CN202906777U (en) | 2013-04-24 |
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| CN 201220540546 Expired - Fee Related CN202906777U (en) | 2012-10-22 | 2012-10-22 | Photovoltaic inverter unit and three-phase photovoltaic inverter device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916601A (en) * | 2012-10-22 | 2013-02-06 | 江苏兆伏新能源有限公司 | Photovoltaic inversion unit and triphase photovoltaic inversion device |
-
2012
- 2012-10-22 CN CN 201220540546 patent/CN202906777U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916601A (en) * | 2012-10-22 | 2013-02-06 | 江苏兆伏新能源有限公司 | Photovoltaic inversion unit and triphase photovoltaic inversion device |
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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: 20130424 Termination date: 20151022 |
|
| EXPY | Termination of patent right or utility model |