CN212258435U - Grid-connected and off-grid photovoltaic system - Google Patents
Grid-connected and off-grid photovoltaic system Download PDFInfo
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- CN212258435U CN212258435U CN202021098000.7U CN202021098000U CN212258435U CN 212258435 U CN212258435 U CN 212258435U CN 202021098000 U CN202021098000 U CN 202021098000U CN 212258435 U CN212258435 U CN 212258435U
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- 238000010248 power generation Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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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Abstract
The utility model discloses a and from net photovoltaic system, and from net photovoltaic system include direct current generating line, photovoltaic charge controller, leave net inverter, system controller, grid-connected inverter, photovoltaic module and alternating current generating line, system controller is connected to through photovoltaic charge controller direct current generating line and pass through grid-connected inverter is connected to alternating current generating line, system controller still connects photovoltaic module, alternating current generating line with direct current generating line passes through leave net inverter and connect, it still is connected to the load to leave net inverter, alternating current generating line still is connected to the battery. The grid-connected and off-grid photovoltaic system aims at solving the technical problem that photovoltaic power utilization efficiency is low in the prior art.
Description
Technical Field
The utility model belongs to the photovoltaic system field especially relates to a and leave net photovoltaic system.
Background
The photovoltaic panel component is a direct solar power generation device, is mainly made of silicon semiconductor materials, and converts light energy into electric energy, so that clean energy can be conveniently collected and utilized.
For the existing photovoltaic systems, a grid-connected photovoltaic system and an off-grid photovoltaic system are mainly used. The grid-connected photovoltaic system is directly connected to the grid for power generation, and when the power grid is in power failure maintenance, the grid-connected photovoltaic system needs to stop running due to the need of island protection. The off-grid photovoltaic system is mainly used for an independent power supply, needs to be provided with a plurality of storage batteries due to the influence of rainy weather, and can cause electric power waste when the illumination is sufficient due to the fact that the off-grid photovoltaic system cannot be connected to the grid.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Based on this, the utility model provides a and from net photovoltaic system, should and from net photovoltaic system aim at solving the technical problem that photovoltaic power utilization efficiency is low among the prior art.
(II) technical scheme
For solving the technical problem, the utility model provides a and leave net photovoltaic system, wherein, and leave net photovoltaic system include direct current generating line, photovoltaic charge controller, leave net inverter, system controller, grid-connected inverter, photovoltaic module and exchange generating line, system controller is connected to through photovoltaic charge controller direct current generating line and pass through grid-connected inverter is connected to exchange the generating line, system controller still connects photovoltaic module, exchange the generating line with direct current generating line passes through it connects from net inverter, it still is connected to the load to leave net inverter, it still is connected to the battery to exchange the generating line.
Preferably, the system controller is an automatic switch.
Preferably, a wire for supplying power or signals to the system controller by the alternating-current bus is further connected between the system controller and the alternating-current bus.
The grid-connected inverter is a household three-phase inverter SUN2000-10KTL-MO with the Hua of 10 kw.
Preferably, the grid-connected inverter is a solid Dewei 20kw three-phase two-way SDT series GW 20K-DT.
Preferably, the grid-connected inverter is a brocade wave 10kw single-phase two-way GCI-1P 10K-4G.
Preferably, the off-grid inverter is an England _ BN1-6kW off-grid inverter
(III) advantageous effects
The utility model discloses compare with prior art, the utility model discloses and from net photovoltaic system's beneficial effect mainly includes:
the operation in various modes is realized through simple combination, mature grid-connected inverters and off-grid inverters are adopted to replace a grid-connected and off-grid integrated machine, the operation control of equipment is simple, the automatic switching off-grid operation during power failure of a power grid and the automatic switching on-grid operation during power failure of the power grid can be realized, and the operation mode can also be manually and automatically selected. The photovoltaic power generation system can be used as a long-term standby power source, and a standby power source is supplemented through photovoltaic power generation.
Advantageous effects of the present invention which are not described herein will be described in the corresponding portions of the detailed description.
Drawings
The features and advantages of the invention will be more clearly understood by reference to the accompanying drawings, which are schematic and should not be understood as imposing any limitation on the invention, in which:
fig. 1 is a schematic diagram of a grid-connected and off-grid photovoltaic system according to an embodiment of the present invention.
Description of reference numerals:
1. a direct current bus; 2. a photovoltaic charge controller; 3. an off-grid inverter; 4. a storage battery; 5. a system controller; 6. a grid-connected inverter; 7. a load; 8. a photovoltaic module; 9. an alternating current bus; 10. an electric wire.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two elements may be mechanically or electrically connected, directly or indirectly connected through an intermediate medium, or connected through the inside of the two elements, or "in transmission connection", that is, connected in a power manner through various suitable manners such as belt transmission, gear transmission, or sprocket transmission. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1, the utility model provides a and from net photovoltaic system, and from net photovoltaic system includes direct current bus 1, photovoltaic charge controller 2, from net inverter 3, system controller 5, grid-connected inverter 6, photovoltaic module 8 and interchange generating line 9, system controller 5 is connected to direct current bus 1 through photovoltaic charge controller 2 and is connected to interchange generating line 9 through grid-connected inverter 6, system controller 5 still connects photovoltaic module 8, interchange generating line 9 and direct current bus 1 are connected through from net inverter 3, from net inverter 3 still is connected to load 7, interchange generating line 9 still is connected to battery 4.
According to the utility model discloses a specific embodiment, system controller 5 is two way automatic switch, including normally opening electromagnetic relay and normally closed electromagnetic relay. An electric wire 10 for supplying power or signals to the system controller 5 from the ac bus 9 is also connected between the system controller 5 and the ac bus 9.
In addition, the grid-connected inverter 6 is preferably a device used by a general grid-connected photovoltaic system, such as a three-phase inverter SUN2000-10KTL-MO used by a 10kw user, a Gude Wei 20kw three-phase two-way SDT series (with screen) GW20K-DT, a Jinlang 10kw single-phase two-way GCI-1P10K-4G and the like. The off-grid inverter 3 is a device used by a general off-grid photovoltaic system, such as an off-grid inverter of England-BN 1-6 kW. And the utility model is not limited to this, can also adopt other suitable alternatives.
As shown in fig. 1, the photovoltaic charge controller 2 is connected to the photovoltaic module 8 to charge the battery. And in the off-grid mode, the off-grid inverter 3 takes the electricity of the storage battery 4 to supply power to the load 7. And in the grid-connected mode, the off-grid inverter 3 supplies power to the power grid connected with the bypass alternating current bus 9. The storage battery 4 stores electric energy generated by the photovoltaic module 8. The system controller 5 is similar to a switch, and switches the operation of the photovoltaic module 8 and the grid-connected inverter 6 or the off-grid inverter 3 as required. The grid-connected inverter 6 operates in a grid-connected power generation mode and does not operate in an off-grid mode. The load 7 may be any consumer. Photovoltaic module 8 provides a source of power for the system. And the alternating current bus 9 is connected with a power grid. In the grid-tie mode, the grid-tie inverter 6 transmits power to the grid via the ac bus 9.
The switching operation principle of the present photovoltaic system is described below with reference to fig. 1:
the system controller 5 is equivalent to two paths of automatic switches, in a manual mode, the photovoltaic module 8 and the photovoltaic charging controller 2 are switched on through the system controller 5, and the photovoltaic module 8 and the grid-connected inverter 6 are switched off, so that the off-grid mode is adopted, the grid-connected inverter 6 does not work when no photovoltaic module 8 is input in the off-grid mode, the photovoltaic module 8 charges a storage battery through the photovoltaic charging controller 2, and the off-grid inverter 3 supplies power to a load 7 by taking the storage battery 4 as power; the photovoltaic module 8 and the grid-connected inverter 6 are connected through the system controller 5, the photovoltaic module 8 and the photovoltaic charging controller 2 are disconnected, the mode is a grid-connected mode, the photovoltaic charging controller 2 does not work when no photovoltaic module 8 is input in the mode, the photovoltaic module 8 transmits power to a national power grid connected with an alternating current bus 9 through the grid-connected inverter 6, and power is supplied to a load 7 through an off-grid inverter bypass. The automatic mode is based on whether the national power grid connected with the alternating current bus 9 has power failure or not.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (7)
1. The utility model provides a and from net photovoltaic system, its characterized in that, and from net photovoltaic system includes direct current bus, photovoltaic charge controller, leaves net inverter, system controller, grid-connected inverter, photovoltaic module and interchange bus, system controller is connected to through photovoltaic charge controller direct current bus and through grid-connected inverter is connected to interchange bus, system controller still connects photovoltaic module, interchange bus with direct current bus passes through it connects from net inverter, it still is connected to the load to leave net inverter, it still is connected to the battery to interchange the bus.
2. The grid-connected and off-grid photovoltaic system of claim 1, wherein the system controller is an automatic switch.
3. The grid-connected and off-grid photovoltaic system of claim 1, wherein wires for supplying power or signals to the system controller from the ac bus are further connected between the system controller and the ac bus.
4. The grid-connected and off-grid photovoltaic system of any one of claims 1 to 3, wherein the grid-connected inverter is a 10kw household three-phase inverter SUN2000-10 KTL-MO.
5. The grid-connected and off-grid photovoltaic system according to any one of claims 1 to 3, wherein the grid-connected inverter is a curdsway 20kw three-phase two-way SDT series GW 20K-DT.
6. The grid-connected and off-grid photovoltaic system of any one of claims 1 to 3, wherein the grid-connected inverter is a brocade wave 10kw single-phase two-way GCI-1P 10K-4G.
7. The grid-connected off-grid photovoltaic system of any one of claims 1 to 3, wherein the off-grid inverter is an Enweiteng _ BN1-6kW off-grid inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021098000.7U CN212258435U (en) | 2020-06-15 | 2020-06-15 | Grid-connected and off-grid photovoltaic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021098000.7U CN212258435U (en) | 2020-06-15 | 2020-06-15 | Grid-connected and off-grid photovoltaic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212258435U true CN212258435U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021098000.7U Expired - Fee Related CN212258435U (en) | 2020-06-15 | 2020-06-15 | Grid-connected and off-grid photovoltaic system |
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| Country | Link |
|---|---|
| CN (1) | CN212258435U (en) |
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2020
- 2020-06-15 CN CN202021098000.7U patent/CN212258435U/en not_active Expired - Fee Related
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Granted publication date: 20201229 |