CN214314585U - Photovoltaic power generation grid-connected system - Google Patents
Photovoltaic power generation grid-connected system Download PDFInfo
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- CN214314585U CN214314585U CN202120219580.9U CN202120219580U CN214314585U CN 214314585 U CN214314585 U CN 214314585U CN 202120219580 U CN202120219580 U CN 202120219580U CN 214314585 U CN214314585 U CN 214314585U
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- 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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- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The utility model relates to a photovoltaic grid-connected power supply technical field discloses a photovoltaic power generation grid-connected system, include: the photovoltaic array power supply is connected with the input end of the photovoltaic grid-connected inverter through a direct current boosting device, the output end of the photovoltaic grid-connected inverter is connected with the input end of a power transformer through the reactor, and the output end of the power transformer is connected with a power public network through an automatic disconnecting link switch; the photovoltaic array power supply is connected with the storage battery through a switch K1. The utility model discloses a photovoltaic power generation is incorporated into the power networks device and public electric wire netting and is incorporated into the power networks, for public electric wire netting power supply, the energy saving. The utility model discloses have the function that automatic operation photovoltaic power generation is incorporated into the power networks, still have energy memory's function, its photovoltaic power generation system that is incorporated into the power networks simple structure, with low costs, assembly convenient operation.
Description
Technical Field
The utility model relates to a photovoltaic grid-connected power supply technical field especially relates to a photovoltaic power generation grid-connected system.
Background
Photovoltaic power generation is a power generation system that converts solar energy directly into electrical energy. The photovoltaic power generation energy source has a wide development prospect, and when the photovoltaic power generation is sufficient in power supply, the photovoltaic power generation generates a large amount of generated energy, so that energy waste is caused. Therefore, a system capable of realizing grid connection of photovoltaic power generation is needed, power is supplied to a public power grid, and energy is saved.
Disclosure of Invention
For solving the above problem, the utility model aims at providing a photovoltaic power generation grid-connected system.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a photovoltaic power generation grid-connected system comprising: the photovoltaic grid-connected inverter comprises a photovoltaic array power supply 1, a photovoltaic grid-connected inverter 4, a reactor 7 and a power transformer 8, wherein the photovoltaic array power supply 1 is connected with the input end of the photovoltaic grid-connected inverter 4 through a direct current boosting device 3, the output end of the photovoltaic grid-connected inverter 4 is connected with the input end of the power transformer 8 through the reactor 7, and the output end of the power transformer 8 is connected with a power public network 10 through an automatic disconnecting link switch 9; the photovoltaic array power supply 1 is connected with the storage battery 2 through a switch K1;
the output end of the DSP controller 5 is connected with the drive end of the photovoltaic grid-connected inverter 4 through a drive circuit 6;
a first feedback end and a second feedback end of the DSP controller 5 are respectively connected with phase current sensors arranged on three-phase alternating current at the input end and the output end of the photovoltaic grid-connected inverter 4 through signal cables; a third feedback end of the DSP controller 5 is respectively connected with each phase current sensor at the output end of the power transformer 8 through a signal cable; the fourth control end of the DSP controller 5 is respectively connected with the automatic disconnecting link switch 9 through a signal cable.
A photovoltaic power generation grid-connected system is characterized in that a photovoltaic grid-connected inverter 4 is a direct current inversion three-phase alternating current device.
The direct current boosting device 3 is a DC/DC direct current booster.
Due to the adoption of the technical scheme, the utility model discloses have following superiority:
a photovoltaic power generation grid-connected system is connected with a public power grid through a photovoltaic power generation device and a grid-connected device to supply power to the public power grid, and energy is saved. The utility model discloses have the function that automatic operation photovoltaic power generation is incorporated into the power networks, still have energy memory's photovoltaic power generation system that is incorporated into the power networks, its simple structure, with low costs, assembly convenient operation.
Drawings
Fig. 1 is a schematic block diagram of a photovoltaic power generation grid-connected system.
Detailed Description
The present invention will be described in detail below with reference to specific examples.
As shown in fig. 1, a photovoltaic power generation grid-connected system includes: the photovoltaic grid-connected inverter comprises a photovoltaic array power supply 1, a photovoltaic grid-connected inverter 4, a reactor 7 and a power transformer 8, wherein the photovoltaic array power supply 1 is connected with the input end of the photovoltaic grid-connected inverter 4 through a direct current boosting device 3, the output end of the photovoltaic grid-connected inverter 4 is connected with the input end of the power transformer 8 through the reactor 7, and the output end of the power transformer 8 is connected with a power public network 10 through an automatic disconnecting link switch 9; the photovoltaic array power supply 1 is connected with the storage battery 2 through a switch K1;
the output end of the DSP controller 5 is connected with the drive end of the photovoltaic grid-connected inverter 4 through a drive circuit 6;
a first feedback end and a second feedback end of the DSP controller 5 are respectively connected with phase current sensors arranged on three-phase alternating current at the input end and the output end of the photovoltaic grid-connected inverter 4 through signal cables; a third feedback end of the DSP controller 5 is respectively connected with each phase current sensor at the output end of the power transformer 8 through a signal cable; the fourth control end of the DSP controller 5 is respectively connected with the automatic disconnecting link switch 9 through a signal cable.
The photovoltaic grid-connected inverter 4 is a direct current inversion three-phase alternating current device. The direct current booster 3 is a DC/DC direct current booster.
Photovoltaic power generation grid connection: when the DSP controller 5 detects through the current sensors of the first feedback end and the second feedback end, the solar photovoltaic array power supply 1 is higher than the voltage of the storage battery 2, the DSP controller 5 controls the on-off switch K1 to be switched off, and the solar energy collected by the photovoltaic array power supply 1 is boosted through the voltage doubling of the direct current boosting device 3 to provide direct current for the photovoltaic grid-connected inverter 4; the photovoltaic grid-connected inverter 4 converts direct current into three-phase alternating current through inversion; the output end of the photovoltaic grid-connected inverter 4 transmits power to the input end of the power transformer 8 through the reactor 7, when the voltage detected by each phase sensor at the output end of the power transformer 8 at the third feedback end of the DSP controller 5 is the same as the voltage of the power public network 10, the fourth control end of the DSP controller 5 controls the automatic disconnecting link switch 9 to be conducted, and the grid is connected to the power public network 10.
When the DSP controller 5 detects through the current sensors of the first feedback end and the second feedback end, the voltage 1 of the photovoltaic array power supply is lower than the voltage of the storage battery 2, and the on-off switch K1 is switched on; meanwhile, the DSP controller 5 controls the automatic disconnecting switch 9 to be switched off. The photovoltaic array power supply 1 charges the storage battery 2.
Claims (3)
1. A photovoltaic power generation grid-connected system is characterized in that: the method comprises the following steps: the photovoltaic grid-connected inverter comprises a photovoltaic array power supply (1), a photovoltaic grid-connected inverter (4), a reactor (7) and a power transformer (8), wherein the photovoltaic array power supply (1) is connected with the input end of the photovoltaic grid-connected inverter (4) through a direct-current boosting device (3), the output end of the photovoltaic grid-connected inverter (4) is connected with the input end of the power transformer (8) through the reactor (7), and the output end of the power transformer (8) is connected with a power public network (10) through an automatic disconnecting link switch (9); the photovoltaic array power supply (1) is connected with the storage battery (2) through a switch K1;
the output end of the DSP controller (5) is connected with the drive end of the photovoltaic grid-connected inverter (4) through a drive circuit (6);
a first feedback end and a second feedback end of the DSP controller (5) are respectively connected with phase current sensors arranged on three-phase alternating current at the input end and the output end of the photovoltaic grid-connected inverter (4) through signal cables; a third feedback end of the DSP controller (5) is respectively connected with each phase current sensor at the output end of the power transformer (8) through a signal cable; the fourth control end of the DSP controller (5) is respectively connected with the automatic disconnecting link switch (9) through a signal cable.
2. The grid-connected photovoltaic power generation system according to claim 1, wherein: the photovoltaic grid-connected inverter (4) is a direct current inversion three-phase alternating current device.
3. The grid-connected photovoltaic power generation system according to claim 1, wherein: the direct current booster device (3) is a DC/DC direct current booster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120219580.9U CN214314585U (en) | 2021-01-27 | 2021-01-27 | Photovoltaic power generation grid-connected system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120219580.9U CN214314585U (en) | 2021-01-27 | 2021-01-27 | Photovoltaic power generation grid-connected system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214314585U true CN214314585U (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120219580.9U Active CN214314585U (en) | 2021-01-27 | 2021-01-27 | Photovoltaic power generation grid-connected system |
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| Country | Link |
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| CN (1) | CN214314585U (en) |
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2021
- 2021-01-27 CN CN202120219580.9U patent/CN214314585U/en active Active
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