CN205212723U - Photovoltaic inverter - Google Patents
Photovoltaic inverter Download PDFInfo
- Publication number
- CN205212723U CN205212723U CN201521089747.5U CN201521089747U CN205212723U CN 205212723 U CN205212723 U CN 205212723U CN 201521089747 U CN201521089747 U CN 201521089747U CN 205212723 U CN205212723 U CN 205212723U
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- China
- Prior art keywords
- diode
- output
- diverter switch
- transformer
- 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
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- Inverter Devices (AREA)
Abstract
The utility model discloses a photovoltaic inverter, it includes DC -DC stepup transformer, control circuit, a change over switch, the circuit that is incorporated into the power networks, power and AC electric network, the power be connected with control circuit, a control circuit and a change over switch are connected, the one end of DC -DC stepup transformer be connected with the photovoltaic cell subassembly, the other end is connected with a change over switch, a change over switch with circuit connection is incorporated into the power networks to the net circuit is connected with AC electric network, the circuit that is incorporated into the power networks include the grid -connected inverter and the wave filter that is incorporated into the power networks to the input of net dc -to -ac converter is connected with a change over switch, grid -connected inverter's the output and the input connection of the wave filter that is incorporated into the power networks, and the output and the AC electric network of the wave filter that is incorporated into the power networks are connected. Direct current output both can have been regarded as to the electric energy that this photovoltaic inverter made the photovoltaic cell subassembly produce, also can incorporate AC electric network into as the alternating current, had improved the utilization efficiency of the electric energy of photovoltaic cell subassembly production.
Description
Technical field
The utility model relates to a kind of photovoltaic DC-to-AC converter.
Background technology
General domestic photovoltaic inverter is all grid-connected output AC electricity, and need to use the conversion of AC-DC-interchange to come for the household electrical appliance of drive motors for air-conditioning, refrigerator, washing machine etc., the direct current that photovoltaic cell sends becomes direct current again after inversion, rectification, and the utilization ratio of the electric energy that photovoltaic photovoltaic cell component produces is lower.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of photovoltaic DC-to-AC converter is provided, the electric energy that this photovoltaic DC-to-AC converter makes photovoltaic cell component produce both can export as direct current, also can be incorporated to AC network as alternating current, improve the utilization ratio of the electric energy that photovoltaic cell component produces.
The purpose of this utility model is achieved through the following technical solutions: a kind of photovoltaic DC-to-AC converter, it comprises DC-DC stepup transformer, control circuit, first diverter switch, parallel network circuit, power supply and AC network, described power supply is connected with control circuit, control circuit is connected with the first diverter switch, one end of described DC-DC stepup transformer is connected with photovoltaic cell component, the other end is connected with the first diverter switch, first diverter switch is connected with parallel network circuit, parallel network circuit is connected with AC network, described parallel network circuit comprises combining inverter and grid-connected filter, the input of combining inverter is connected with the first diverter switch, the output of combining inverter is connected with the input of grid-connected filter, the output of grid-connected filter is connected with AC network, described power supply comprises cowling panel, DC circuit breaker QF1, transformer T1, first electric capacity C1, second electric capacity C2 and Switching Power Supply Ua, described cowling panel is provided with the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first resistance R1 and the second resistance R2, the primary coil incoming transport power supply of described transformer T1, one end of the secondary coil of transformer T1 is connected with the second diode D2 positive pole, the 3rd diode D3 negative pole, and the other end of the secondary coil of transformer T1 is connected with the negative pole of the positive pole of the first diode D1 and the 4th diode D4, one end normal battle of outside relay is accessed in one end of first resistance R1, and be connected with the negative pole of the second diode D2 and the negative pole of the first diode D1, the other end of the first resistance R1 is connected with one end of the second resistance R2, the other end of normal battle of the described outside relay of other end access of the second resistance R2, and be connected with one end of the first electric capacity C1, one end of the second electric capacity C2 and first pin of DC circuit breaker QF1, the positive pole of the 3rd diode D3 is connected with the 3rd pin of the other end of the positive pole of the 4th diode D4, the first electric capacity C1, the other end of the second electric capacity C2 and DC circuit breaker QF1, second pin of DC circuit breaker QF1 is connected with the HV pin of Switching Power Supply Ua, and the 4th pin of DC circuit breaker QF1 is connected with the C pin of Switching Power Supply Ua, and Switching Power Supply Ua is connected with control circuit.
This photovoltaic DC-to-AC converter also comprises the 3rd electric capacity C3 for voltage stabilizing, and described 3rd electric capacity C3 is connected between the output of DC-DC stepup transformer and the input of described first diverter switch.
Described grid-connected filter is EMC filter, for the harmonic wave of combining inverter output current described in filtering.
The parameter of described transformer T1 is the transformer of 380V/150V, 150VA.
Described first diverter switch comprises an input and two outputs, two described outputs are respectively the first output and the second output, the input of described first diverter switch connects the output of described DC-DC stepup transformer, first output of described first diverter switch connects the input of described combining inverter, for grid-connected output AC electricity; Second output of described first diverter switch as DC bus port, for exporting direct current.
The beneficial effects of the utility model are: the utility model provides a kind of photovoltaic DC-to-AC converter, the electric energy that this photovoltaic DC-to-AC converter makes photovoltaic cell component produce both can export as direct current, also can be incorporated to AC network as alternating current, improve the utilization ratio of the electric energy that photovoltaic cell component produces.
Accompanying drawing explanation
Fig. 1 is photovoltaic DC-to-AC converter structural representation;
Fig. 2 is power circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail, but protection range of the present utility model is not limited to the following stated.
As depicted in figs. 1 and 2, a kind of photovoltaic DC-to-AC converter, it comprises DC-DC stepup transformer, control circuit, first diverter switch, parallel network circuit, power supply and AC network, described power supply is connected with control circuit, control circuit is connected with the first diverter switch, one end of described DC-DC stepup transformer is connected with photovoltaic cell component, the other end is connected with the first diverter switch, first diverter switch is connected with parallel network circuit, parallel network circuit is connected with AC network, described parallel network circuit comprises combining inverter and grid-connected filter, the input of combining inverter is connected with the first diverter switch, the output of combining inverter is connected with the input of grid-connected filter, the output of grid-connected filter is connected with AC network, described power supply comprises cowling panel, DC circuit breaker QF1, transformer T1, first electric capacity C1, second electric capacity C2 and Switching Power Supply Ua, described cowling panel is provided with the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first resistance R1 and the second resistance R2, the primary coil incoming transport power supply of described transformer T1, one end of the secondary coil of transformer T1 is connected with the second diode D2 positive pole, the 3rd diode D3 negative pole, and the other end of the secondary coil of transformer T1 is connected with the negative pole of the positive pole of the first diode D1 and the 4th diode D4, one end normal battle of outside relay is accessed in one end of first resistance R1, and be connected with the negative pole of the second diode D2 and the negative pole of the first diode D1, the other end of the first resistance R1 is connected with one end of the second resistance R2, the other end of normal battle of the described outside relay of other end access of the second resistance R2, and be connected with one end of the first electric capacity C1, one end of the second electric capacity C2 and first pin of DC circuit breaker QF1, the positive pole of the 3rd diode D3 is connected with the 3rd pin of the other end of the positive pole of the 4th diode D4, the first electric capacity C1, the other end of the second electric capacity C2 and DC circuit breaker QF1, second pin of DC circuit breaker QF1 is connected with the HV pin of Switching Power Supply Ua, and the 4th pin of DC circuit breaker QF1 is connected with the C pin of Switching Power Supply Ua, and Switching Power Supply Ua is connected with control circuit.
This photovoltaic DC-to-AC converter also comprises the 3rd electric capacity C3 for voltage stabilizing, and described 3rd electric capacity C3 is connected between the output of DC-DC stepup transformer and the input of described first diverter switch.
Described grid-connected filter is EMC filter, for the harmonic wave of combining inverter output current described in filtering.
The parameter of described transformer T1 is the transformer of 380V/150V, 150VA.
Described first diverter switch comprises an input and two outputs, two described outputs are respectively the first output and the second output, the input of described first diverter switch connects the output of described DC-DC stepup transformer, first output of described first diverter switch connects the input of described combining inverter, for grid-connected output AC electricity; Second output of described first diverter switch as DC bus port, for exporting direct current.
By arranging the first diverter switch between DC-DC stepup transformer and combining inverter, make this photovoltaic DC-to-AC converter both can export direct current by the second output of the first diverter switch, also can by the grid-connected output AC electricity of the first output of the first diverter switch, by controlling the operating state of the first diverter switch, realize the switching between AC-DC-interchange, meet the driving requirement of the household electrical appliance such as air-conditioning, washing machine, improve the utilization ratio of the electric energy that photovoltaic cell component produces.
3rd electric capacity C3 is connected between the output of DC-DC stepup transformer and the input of the first diverter switch, and the 3rd electric capacity C3 is used for voltage stabilizing.The high voltage direct current that DC-DC stepup transformer exports is delivered to the input of the first diverter switch after the voltage stabilizing of the 3rd electric capacity C3, which prevent the damage that voltage fluctuation causes household electrical appliance and combining inverter, ensure that the normal work of the power consumption equipment such as household electrical appliance and combining inverter.
Claims (5)
1. a photovoltaic DC-to-AC converter, it is characterized in that: it comprises DC-DC stepup transformer, control circuit, first diverter switch, parallel network circuit, power supply and AC network, described power supply is connected with control circuit, control circuit is connected with the first diverter switch, one end of described DC-DC stepup transformer is connected with photovoltaic cell component, the other end is connected with the first diverter switch, first diverter switch is connected with parallel network circuit, parallel network circuit is connected with AC network, described parallel network circuit comprises combining inverter and grid-connected filter, the input of combining inverter is connected with the first diverter switch, the output of combining inverter is connected with the input of grid-connected filter, the output of grid-connected filter is connected with AC network, described power supply comprises cowling panel, DC circuit breaker QF1, transformer T1, first electric capacity C1, second electric capacity C2 and Switching Power Supply Ua, described cowling panel is provided with the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first resistance R1 and the second resistance R2, the primary coil incoming transport power supply of described transformer T1, one end of the secondary coil of transformer T1 is connected with the second diode D2 positive pole, the 3rd diode D3 negative pole, and the other end of the secondary coil of transformer T1 is connected with the negative pole of the positive pole of the first diode D1 and the 4th diode D4, one end normal battle of outside relay is accessed in one end of first resistance R1, and be connected with the negative pole of the second diode D2 and the negative pole of the first diode D1, the other end of the first resistance R1 is connected with one end of the second resistance R2, the other end of normal battle of the described outside relay of other end access of the second resistance R2, and be connected with one end of the first electric capacity C1, one end of the second electric capacity C2 and first pin of DC circuit breaker QF1, the positive pole of the 3rd diode D3 is connected with the 3rd pin of the other end of the positive pole of the 4th diode D4, the first electric capacity C1, the other end of the second electric capacity C2 and DC circuit breaker QF1, second pin of DC circuit breaker QF1 is connected with the HV pin of Switching Power Supply Ua, and the 4th pin of DC circuit breaker QF1 is connected with the C pin of Switching Power Supply Ua, and Switching Power Supply Ua is connected with control circuit.
2. a kind of photovoltaic DC-to-AC converter according to claim 1, is characterized in that: this photovoltaic DC-to-AC converter also comprises the 3rd electric capacity C3 for voltage stabilizing, and described 3rd electric capacity C3 is connected between the output of DC-DC stepup transformer and the input of described first diverter switch.
3. a kind of photovoltaic DC-to-AC converter according to claim 1, is characterized in that: described grid-connected filter is EMC filter, for the harmonic wave of combining inverter output current described in filtering.
4. a kind of photovoltaic DC-to-AC converter according to claim 1, is characterized in that: the parameter of described transformer T1 is the transformer of 380V/150V, 150VA.
5. a kind of photovoltaic DC-to-AC converter according to claim 1, it is characterized in that: described first diverter switch comprises an input and two outputs, two described outputs are respectively the first output and the second output, the input of described first diverter switch connects the output of described DC-DC stepup transformer, first output of described first diverter switch connects the input of described combining inverter, for grid-connected output AC electricity; Second output of described first diverter switch as DC bus port, for exporting direct current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521089747.5U CN205212723U (en) | 2015-12-24 | 2015-12-24 | Photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521089747.5U CN205212723U (en) | 2015-12-24 | 2015-12-24 | Photovoltaic inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205212723U true CN205212723U (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521089747.5U Expired - Fee Related CN205212723U (en) | 2015-12-24 | 2015-12-24 | Photovoltaic inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205212723U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024045370A1 (en) * | 2022-08-31 | 2024-03-07 | 广东美的制冷设备有限公司 | Compatible power supply circuit and control method therefor, and controller and storage medium |
-
2015
- 2015-12-24 CN CN201521089747.5U patent/CN205212723U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024045370A1 (en) * | 2022-08-31 | 2024-03-07 | 广东美的制冷设备有限公司 | Compatible power supply circuit and control method therefor, and controller and storage medium |
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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: 20160504 Termination date: 20191224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |