CN208522474U - A kind of inverter and photovoltaic energy storage device of photovoltaic energy storage device - Google Patents
A kind of inverter and photovoltaic energy storage device of photovoltaic energy storage device Download PDFInfo
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- CN208522474U CN208522474U CN201821085862.9U CN201821085862U CN208522474U CN 208522474 U CN208522474 U CN 208522474U CN 201821085862 U CN201821085862 U CN 201821085862U CN 208522474 U CN208522474 U CN 208522474U
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Abstract
The utility model discloses a kind of inverter of photovoltaic energy storage device and photovoltaic energy storage devices, inverter includes transformer, the first rectification module, the second rectification module, the first inverter module, the second inverter module, and the first photovoltaic interface and the second photovoltaic interface for connecting photovoltaic module；Transformer includes primary side winding, the first vice-side winding and the second vice-side winding, and primary side winding is for connecting accumulation power supply；First vice-side winding, the first rectification module and the first inverter module are sequentially connected, and the second vice-side winding, the second rectification module and the second inverter module are sequentially connected；First photovoltaic interface is between the first rectification module and the first inverter module, and the second photovoltaic interface is between the second rectification module and the second inverter module.Direct current is provided to inverter by accumulation power supply to realize, to realize the cooperation for exporting direct current with photovoltaic, inverter is finally made to provide stable alternating current to power grid or load.
Description
Technical field
The utility model relates to the inverter and photovoltaic energy storage of photovoltaic art more particularly to a kind of photovoltaic energy storage device dresses
It sets.
Background technique
Photovoltaic power generation is the process that solar energy is converted to electric energy, and output power is by rings such as intensity of solar radiation, temperature
The influence of border factor and acute variation, therefore the direct current of photovoltaic electric power output is unstable, the exchange be converted to by inverter
Electricity is also unstable and can generate harmonic wave, so that accessing power grid or to cause impact to power grid or to negative when AC load power supply
The normal work of load impacts.
Therefore, the prior art, which is provided in photovoltaic generating system, configures accumulation power supply, as shown in Figure 1, with smooth photovoltaic
Electric power output, promotes photovoltaic electric power quality.
In addition, in order to promote renewable energy utilization, the prior art is proposed by renewable energy, energy-storage system and load
Compositing area type power grid, i.e. micro-capacitance sensor can both be incorporated into the power networks as independent entirety, can also under off-network state isolated island
Operation.Energy-storage system particular as microgrid component units is the energy buffer link in micro-capacitance sensor, plays and mentions to micro-capacitance sensor
High control stability, the power-balance for promoting micro-capacitance sensor power quality, maintaining microgrid, improvement micro-capacitance sensor anti-interference ability etc. are important
Effect.And the energy-storage system in micro-capacitance sensor can also make emergency power in the case where power grid power failure.Based on photovoltaic power generation
Micro-capacitance sensor structure it is as shown in Figure 2.
Use above scene is required to photovoltaic power generation and accumulation power supply power supply matches, by inverter to power grid or load
Stable alternating current is provided.But how accumulation power supply to realize with photovoltaic exports direct current to inverter offer direct current
Cooperation, so that inverter is provided stable alternating current to power grid or load is still the technical issues that need to address.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of inversions of photovoltaic energy storage device
How device and photovoltaic energy storage device can solve accumulation power supply to inverter offer direct current, export direct current with photovoltaic to realize
The cooperation of electricity finally makes inverter to power grid or loads the problem of providing stable alternating current.
The purpose of this utility model adopts the following technical scheme that realization:
A kind of inverter of photovoltaic energy storage device, including it is transformer, the first rectification module, the second rectification module, first inverse
Become module, the second inverter module, and the first photovoltaic interface and the second photovoltaic interface for connecting photovoltaic module；
The transformer includes primary side winding, the first vice-side winding and the second vice-side winding, and the primary side winding is for connecting
Connect accumulation power supply；First vice-side winding, the first rectification module and the first inverter module are sequentially connected, the second secondary side around
Group, the second rectification module and the second inverter module are sequentially connected；
Between first rectification module and the first inverter module, second photovoltaic connects first photovoltaic interface
Mouth is between second rectification module and the second inverter module.
Further, first inverter module includes the first output end and second output terminal, second inverter module
Including third output end and the 4th output end；
The second output terminal is connected to the third output end, first output end and the output exchange of the 4th output end
Electricity；Alternatively, first output end is connected to the third output end, the second output terminal is connected to the 4th output
End, first output end and second output terminal export alternating current.
Further, first inverter module and the second inverter module include full bridge inverter.
Further, the output of the accumulation power supply is direct current, and the inverter further includes energy storage inverter module, described
Primary side winding is connected to the accumulation power supply by the energy storage inverter module.
Further, the energy storage inverter module includes half-bridge inversion circuit.
Further, first rectification module includes Half bridge rectifier circuit.
Further, first rectification module, the second rectification module, the first inverter module, the second inverter module difference
Including corresponding control unit.
Further, the inverter further includes control module, first rectification module, the second rectification module, first
Inverter module, the second inverter module are controlled by the control module.
A kind of photovoltaic energy storage device, including inverter above-mentioned and photovoltaic module.
Further, the photovoltaic module includes photovoltaic panel and powerinjected method controller, and the photovoltaic panel passes through the function
Rate tracking controller is connected to the first photovoltaic interface and the second photovoltaic interface of the inverter.
Compared with prior art, the beneficial effect of the utility model embodiment is: passing through the transformation of two vice-side windings of band
Device handles accumulation power supply for two-way alternating current, and alternating current is straight with photovoltaic panel output after the rectification of the first rectification module all the way
Galvanic electricity is collected, then by the first inverter module inversion；Another way alternating current through the second rectification module rectification after with another photovoltaic panel
The direct current of output collects, then by the second inverter module inversion；First inverter module, the second inverter module output both can be with
Individually output uses, and can also can be conformed to cascaded-output with parallel output convenient for exporting access power grid or providing for load
The alternating current asked；Direct current is provided to inverter by accumulation power supply to realize, to realize and photovoltaic output direct current
Cooperation finally makes inverter provide stable alternating current to power grid or load.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the smooth photovoltaic electric power output of accumulation power supply；
Fig. 2 is the photovoltaic power generation micro-capacitance sensor structural schematic diagram comprising accumulation power supply；
Fig. 3 is the structural schematic diagram for the photovoltaic energy storage device that the utility model embodiment one provides；
Fig. 4 is the structural schematic diagram of two inverter module cascaded-outputs of photovoltaic energy storage device in Fig. 3；
Fig. 5 is the structural schematic diagram of two inverter module parallel outputs of photovoltaic energy storage device in Fig. 3.
In figure: 100, inverter；110, transformer；111, primary side winding；112, the first vice-side winding；113, the second secondary side
Winding；120, the first rectification module；130, the second rectification module；140, the first inverter module；150, the second inverter module；160,
Energy storage inverter module；101, the first photovoltaic interface；102, the second photovoltaic interface；10, photovoltaic module；11, photovoltaic panel；12, power
Tracking controller；20, accumulation power supply.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
Embodiment one
Such as the structural schematic diagram that Fig. 3-Fig. 5 is a kind of photovoltaic energy storage device.Photovoltaic energy storage device includes inverter 100, with
And photovoltaic module 10.
Inverter 100 such as Fig. 3-Fig. 5, photovoltaic energy storage device is whole including transformer 110, the first rectification module 120, second
Flow module 130, the first inverter module 140, the second inverter module 150, and the first photovoltaic for connecting photovoltaic module 10 connect
Mouth 101 and the second photovoltaic interface 102.
Transformer 110 includes primary side winding 111, the first vice-side winding 112 and the second vice-side winding 113, primary side winding 111
For connecting accumulation power supply 20.First vice-side winding 112, the first rectification module 120 and the first inverter module 140 are sequentially connected,
Second vice-side winding 113, the second rectification module 130 and the second inverter module 150 are sequentially connected.First photovoltaic interface 101 is located at
Between first rectification module 120 and the first inverter module 140, the second photovoltaic interface 102 is located at the second rectification module 130 and second
Between inverter module 150.
As preferred embodiment, photovoltaic module 10 includes a photovoltaic panel 11 or includes that multiple photovoltaic panels 11 form
Photovoltaic array.Corresponding photovoltaic module 10 exports DC voltage to the first photovoltaic interface 101 and the second photovoltaic interface respectively
102。
As preferred embodiment, the first photovoltaic interface 101 and the second photovoltaic interface 102 include DC bus, light
Volt module 10 is connected to the DC bus of the first photovoltaic interface 101 and the second photovoltaic interface 102.
As preferred embodiment, as shown in figure 4, photovoltaic module 10 further includes powerinjected method controller 12, photovoltaic panel
11 are connected to the first photovoltaic interface 101 and the second photovoltaic interface 102 of inverter 100 by powerinjected method controller 12.
The performance of photovoltaic panel 11 can use voltage-current curve, i.e. U-I curve indicates.The instantaneous output of battery component
Power (U*I) just moves on this U-I curve, and the output of battery component will be influenced by external circuit；Therefore can pass through
Powerinjected method, especially MPPT maximum power point tracking (MPPT) cooperate software appropriate using power electronic devices, make photovoltaic module
10 Maximum Power Outputs always, can be carried out power generation to maximally utilize the sun.
If accumulation power supply 20 exports alternating current, which flows through the primary side winding 111 of transformer 110, so that it may
First vice-side winding 112 and the second vice-side winding 113 induce alternating current；The alternating current warp that first vice-side winding 112 induces
To the first photovoltaic interface 101, such as direct current of the first photovoltaic interface 101 is female for output after first rectification module 120 is rectified into direct current
On line；Direct current on DC bus exchanges electricity output through 140 inversion of the first inverter module；The induction of second vice-side winding 113
Alternating current out is exported after the second rectification module 130 is rectified into direct current to the second photovoltaic interface 102, such as the second photovoltaic interface
On 102 DC bus；Direct current on DC bus exchanges electricity output through 150 inversion of the second inverter module.
As preferred embodiment, the output of accumulation power supply 20 is direct current, and inverter 100 further includes energy storage inversion mould
Block 160, primary side winding 111 are connected to accumulation power supply 20 by energy storage inverter module 160.
Although the output of accumulation power supply 20 at this time is direct current, can be handled through 160 inversion of energy storage inverter module as exchange
It is exported after electricity to the primary side winding 111 of transformer 110.
As preferred embodiment, the alternating current that energy storage inverter module 160 is handled DC inverter as high frequency, such as
The alternating current of 10KHz, transformer 110 also uses high frequency transformer accordingly, therefore can reduce transformer 110 and inverter
100 whole volumes, and the alternating current of high frequency after the first rectification module 120, the rectification of the second rectification module 130 output to the
The direct current of one photovoltaic interface 101 and the second photovoltaic interface 102 is smoother, and ripple is smaller, is conducive to the first inverter module 140, the
The alternating current of two inverter modules, 150 outputting high quality.Transformer 110, the first rectification module 120, the second rectification module 130 at this time
It may be implemented between 20 side of accumulation power supply and the first photovoltaic interface 101,20 side of accumulation power supply and the second photovoltaic interface 102
Voltage isolation and high-frequency isolation；Photovoltaic energy storage device and inverter therein 100 have the advantages that electrical isolation and light-weight,
System effectiveness is higher.
As preferred embodiment, as shown in figure 4, energy storage inverter module 160 includes half-bridge inversion circuit, circuit is simpler
It is single, it is less using device.In the present embodiment, energy storage inverter module 160 includes half-bridge inversion circuit, the half-bridge inversion circuit packet
Include switching tube Q13, Q14 and capacitor C5, C6.
As preferred embodiment, the first rectification module 120, the second rectification module 130 include Half bridge rectifier circuit, electricity
Road is simpler, less using device.In the present embodiment, the Half bridge rectifier circuit of the first rectification module 120 include switching tube Q1,
Q2 and capacitor C1, C2；The Half bridge rectifier circuit of second rectification module 130 includes switching tube Q3, Q4 and capacitor C3, C4.
Implement as preferred, energy storage inverter module 160, the first rectification module 120, the second rectification module 130 also wrap
Soft switch circuit is included, to reduce the switching loss of switching tube, improves the efficiency and reliability of inversion, rectification.
As preferred embodiment, the first inverter module 140 and the second inverter module 150 include full-bridge inverting electricity
Road.
In the present embodiment, the full bridge inverter of the first inverter module 140 includes switching tube Q5, Q6, Q9, Q10, and second is inverse
The full bridge inverter for becoming module 150 includes switching tube Q7, Q8, Q11, Q12.
As preferred embodiment, inverter 100 further includes control module (figure is to show), energy storage inverter module 160,
One rectification module 120, the second rectification module 130, the first inverter module 140, the second inverter module 150 are by control module control
System.
In another embodiment, energy storage inverter module 160, the first rectification module 120, the second rectification module 130, first are inverse
Become module 140, the second inverter module 150 respectively includes corresponding control unit.
Energy storage inverter module 160, the first rectification module 120, the second rectification module 130, the first inverter module 140, second
The control method of inverter module 150, if modulation strategy can be achieved by the prior art, this will not be repeated here.
As preferred embodiment, as shown in Figure 4 and Figure 5, the first inverter module 140 include the first output end out1 and
Second output terminal out2, the first output end out1, second output terminal out2 are located on a bridge arm of full bridge inverter.
Second inverter module 150 includes third output end out3 and the 4th output end out4, third output end out3, the 4th output end
Out4 is located on a bridge arm of full bridge inverter.
The output of first inverter module 140, the second inverter module 150 can be 50 or 60Hz, naturally it is also possible to be it
Its frequency, to be matched with power grid or different loading demands.
As preferred embodiment, as shown in figure 4, the first inverter module in the inverter 100 of photovoltaic energy storage device
140, the output of the second inverter module 150 can use cascade system, the second output terminal out2 connection of the first inverter module 140
In the third output end out3 of the second inverter module 150, the first output end out1 and the second inversion mould of the first inverter module 140
4th output end out4 of block 150 exports alternating current U1, such as the alternating current of 240V.
As preferred embodiment, as shown in figure 5, the first inverter module in the inverter 100 of photovoltaic energy storage device
140, the output of the second inverter module 150 can also use parallel way；First output end out1 of the first inverter module 140 connects
Third the output end out3, the second output terminal out2 of the first inverter module 140 for being connected to the second inverter module 150 are connected to second
4th output end out4 of inverter module 150, the first output end out1 and the first inverter module 140 of the first inverter module 140
Second output terminal out2 export alternating current U2, such as the alternating current of 120V.
The inverter 100 and photovoltaic energy storage device of photovoltaic energy storage device provided by the embodiment of the utility model, pass through band two
The transformer 110 of a vice-side winding handles accumulation power supply 20 for two-way alternating current, and alternating current is through the first rectification module 120 all the way
Direct current after rectification with a photovoltaic panel 11 output collects, then by 140 inversion of the first inverter module；Another way alternating current is through
Direct current after the rectification of two rectification modules 130 with the output of another photovoltaic panel 11 collects, then by 150 inversion of the second inverter module；
The output of first inverter module 140, the second inverter module 150 both can individually export use, can also be with cascaded-output, can be with
Parallel output provides satisfactory alternating current convenient for output access power grid or for load；Pass through accumulation power supply to realize
20 provide direct current to inverter 100, to realize and the cooperation of photovoltaic output direct current, finally make inverter 100 to power grid or
Load provides stable alternating current.
Above embodiment is only preferred embodiments of the present invention, cannot be protected with this to limit the utility model
Range, the variation of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacement belong to
In the utility model range claimed.
Claims (10)
1. a kind of inverter of photovoltaic energy storage device, it is characterised in that: including transformer, the first rectification module, the second rectification mould
Block, the first inverter module, the second inverter module, and the first photovoltaic interface for connecting photovoltaic module and the second photovoltaic connect
Mouthful；
The transformer includes primary side winding, the first vice-side winding and the second vice-side winding, and the primary side winding is for connecting storage
It can power supply；First vice-side winding, the first rectification module and the first inverter module are sequentially connected, second vice-side winding,
Second rectification module and the second inverter module are sequentially connected；
First photovoltaic interface is between first rectification module and the first inverter module, second photovoltaic interface position
Between second rectification module and the second inverter module.
2. inverter as described in claim 1, it is characterised in that: first inverter module includes the first output end and second
Output end, second inverter module include third output end and the 4th output end；
The second output terminal is connected to the third output end, and first output end and the 4th output end export alternating current；
Alternatively, first output end is connected to the third output end, the second output terminal is connected to the 4th output end, institute
State the first output end and second output terminal output alternating current.
3. inverter as claimed in claim 2, it is characterised in that: first inverter module and the second inverter module include
Full bridge inverter.
4. inverter as described in claim 1, it is characterised in that: the output of the accumulation power supply is direct current, the inversion
Device further includes energy storage inverter module, and the primary side winding is connected to the accumulation power supply by the energy storage inverter module.
5. inverter as claimed in claim 4, it is characterised in that: the energy storage inverter module includes half-bridge inversion circuit.
6. inverter as described in claim 1, it is characterised in that: first rectification module includes Half bridge rectifier circuit.
7. inverter as described in claim 1, it is characterised in that: first rectification module, the second rectification module, first inverse
Become module, the second inverter module respectively includes corresponding control unit.
8. inverter as described in claim 1, it is characterised in that: it further include control module, first rectification module, second
Rectification module, the first inverter module, the second inverter module are controlled by the control module.
9. a kind of photovoltaic energy storage device, it is characterised in that: including inverter such as of any of claims 1-8, and
Photovoltaic module.
10. photovoltaic energy storage device as claimed in claim 9, it is characterised in that: the photovoltaic module includes photovoltaic panel and power
Tracking controller, the photovoltaic panel are connected to the first photovoltaic interface and of the inverter by the powerinjected method controller
Two photovoltaic interfaces.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821085862.9U CN208522474U (en) | 2018-07-10 | 2018-07-10 | A kind of inverter and photovoltaic energy storage device of photovoltaic energy storage device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821085862.9U CN208522474U (en) | 2018-07-10 | 2018-07-10 | A kind of inverter and photovoltaic energy storage device of photovoltaic energy storage device |
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| CN208522474U true CN208522474U (en) | 2019-02-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808735A (en) * | 2018-07-10 | 2018-11-13 | 深圳市华宝新能源股份有限公司 | A kind of inverter and photovoltaic energy storage device of photovoltaic energy storage device |
-
2018
- 2018-07-10 CN CN201821085862.9U patent/CN208522474U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808735A (en) * | 2018-07-10 | 2018-11-13 | 深圳市华宝新能源股份有限公司 | A kind of inverter and photovoltaic energy storage device of photovoltaic energy storage device |
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