CN202888860U - Off-grid and grid-connected photovoltaic inverter - Google Patents
Off-grid and grid-connected photovoltaic inverter Download PDFInfo
- Publication number
- CN202888860U CN202888860U CN2012205328076U CN201220532807U CN202888860U CN 202888860 U CN202888860 U CN 202888860U CN 2012205328076 U CN2012205328076 U CN 2012205328076U CN 201220532807 U CN201220532807 U CN 201220532807U CN 202888860 U CN202888860 U CN 202888860U
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- converter
- grid
- bridge
- full
- electrical network
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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 an off-grid and grid-connected photovoltaic inverter. The technical solution is that a BOOST DC/DC converter is disposed at a photovoltaic cell panel coupling end; a bidirectional half-bridge DC/DC converter is arranged at a storage battery coupling end; a full-bridge DC/AC converter is arranged at an output end and is used for being connected with an electrical network and loads; a contactor is disposed between the full-bridge DC/AC converter and the electrical network; and the above parts are controlled by a control unit. The inverter allows an off-grid system and a grid-connected system to be combined, is not limited to load power and power consumption, is high in utilization rate of equipment, and can serve as a stand-by power supply.
Description
Technical field
The utility model relates to the photovoltaic power generation technology field, relate in particular to a kind of from and dual-purpose photovoltaic DC-to-AC converter.
Background technology
The conventional photovoltaic electricity generation system is divided into from net electricity generation system and grid-connected system two classes.Be not connected with large electrical network from the net electricity generation system, the electric energy that photovoltaic battery panel produces is stored in the storage battery by photovoltaic controller, from the net inverter direct current in the storage battery is transformed to alternating current and offers the load use.Grid-connected system is the photovoltaic generating system that a kind of and large electrical network is connected, and the direct current that photovoltaic cell sends is directly sent into electrical network after being transformed to alternating current by combining inverter.These two kinds of electricity generation systems have apparent in view shortcoming, in the net electricity generation system, if storage battery has been full of electricity, photovoltaic battery panel just quits work, reduced the utilance of photovoltaic battery panel, when system, often need to determine according to all loads the capacity of inverter, cause system's investment waste; Grid-connected system can only could be worked when electrical network is normal, the electric energy that produces or consumed or serve electrical network (in the situation that permission) by power consumption equipment, in case it is unstable that power failure or electrical network occur, grid-connected system will be out of service, and the user can't use photovoltaic system as a kind of stand-by power supply.
The utility model content
For overcoming above-mentioned technical problem, the utility model provide a kind of from and dual-purpose photovoltaic DC-to-AC converter, it can carry out combination with grid-connected system and off-grid system, significantly improves the utilance of photovoltaic power generation equipment.
For realizing above-mentioned technical purpose, the utility model is realized by the following technical solutions: a kind of from and dual-purpose photovoltaic DC-to-AC converter, comprise the BOOST that links to each other by main circuit boost DC/DC converter, bi-directional half bridge DC/DC converter and full-bridge DC/AC converter; The BOOST DC/DC converter that boosts is arranged on the photovoltaic battery panel link, is used for the maximal power tracing control to photovoltaic battery panel; Bi-directional half bridge DC/DC converter is arranged on the storage battery link, is used for the control that discharges and recharges to storage battery; Full-bridge DC/AC converter is arranged on output, is used for connecting electrical network and load, is provided with contactor between full-bridge DC/AC converter and electrical network; Above-mentioned parts are by the unit controls of control.
The utlity model has following beneficial effect: above-mentioned from and dual-purpose photovoltaic DC-to-AC converter off-grid system and grid-connected system can be carried out combination, be not limited to bearing power and power consumption, initial outlay is little, utilization rate of equipment and installations is high, no matter whether storage battery is full of, and photovoltaic battery panel can be operated in the maximum power generating state; Can be used as a kind of stand-by power supply, reply grid power blackout and fault; But system's spread is avoided the overlapping investment waste.
Description of drawings
Accompanying drawing is the utility model structural representation.
Embodiment
Shown in accompanying drawing, during installation, the BOOST DC/DC converter that boosts is connected with the photovoltaic battery panel outlet line, maximal power tracing control to photovoltaic battery panel, to greatest extent electric energy is inputted, bi-directional half bridge DC/DC converter connects storage battery, be used for discharging and recharging of control storage battery, full-bridge DC/AC converter connects electrical network and load, it offers load or electrical network with converting direct-current power into alternating-current power, wherein be provided with contactor between full-bridge DC/AC converter and the electrical network, be used for both connection status of control, above-mentioned parts are by the unit controls operating state of control.
Connection status by contactor control full-bridge DC/AC converter and electrical network can realize being incorporated into the power networks and off-grid switching.Be specially: when contactor disconnects, enter off-grid system, full-bridge DC/AC converter using voltage mode is controlled, and the AC energy of frequency-and voltage-stabilizing is provided for load; During the contactor closed type, be communicated with electrical network, enter grid-connected system, full-bridge DC/AC converter using Controlled in Current Mode and Based can be sent electric energy into electrical network.
Claims (1)
- One kind from and dual-purpose photovoltaic DC-to-AC converter, it is characterized in that: it comprises the BOOST that links to each other by main circuit boost DC/DC converter, bi-directional half bridge DC/DC converter and full-bridge DC/AC converter; The BOOST DC/DC converter that boosts is arranged on the photovoltaic battery panel link, is used for the maximal power tracing control to photovoltaic battery panel; Bi-directional half bridge DC/DC converter is arranged on the storage battery link, is used for the control that discharges and recharges to storage battery; Full-bridge DC/AC converter is arranged on output, is used for connecting electrical network and load, is provided with contactor between full-bridge DC/AC converter and electrical network; Above-mentioned parts are by the unit controls of control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205328076U CN202888860U (en) | 2012-10-12 | 2012-10-12 | Off-grid and grid-connected photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205328076U CN202888860U (en) | 2012-10-12 | 2012-10-12 | Off-grid and grid-connected photovoltaic inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202888860U true CN202888860U (en) | 2013-04-17 |
Family
ID=48080250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205328076U Expired - Fee Related CN202888860U (en) | 2012-10-12 | 2012-10-12 | Off-grid and grid-connected photovoltaic inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202888860U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296695A (en) * | 2013-05-24 | 2013-09-11 | 上海电机学院 | Energy storage architecture based micro-grid system and energy storage method thereof |
| CN103326402A (en) * | 2013-07-08 | 2013-09-25 | 苏州市职业大学 | Dual mode inverter for solar photovoltaic power generation |
| CN106301199A (en) * | 2016-08-18 | 2017-01-04 | 许昌学院 | A kind of photovoltaic power generation apparatus |
-
2012
- 2012-10-12 CN CN2012205328076U patent/CN202888860U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296695A (en) * | 2013-05-24 | 2013-09-11 | 上海电机学院 | Energy storage architecture based micro-grid system and energy storage method thereof |
| CN103326402A (en) * | 2013-07-08 | 2013-09-25 | 苏州市职业大学 | Dual mode inverter for solar photovoltaic power generation |
| CN103326402B (en) * | 2013-07-08 | 2016-03-02 | 苏州市职业大学 | A kind of solar energy power generating dual mode inverter |
| CN106301199A (en) * | 2016-08-18 | 2017-01-04 | 许昌学院 | A kind of photovoltaic power generation apparatus |
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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: 20130417 Termination date: 20141012 |
|
| EXPY | Termination of patent right or utility model |