CN106712258A - Power supply system for photovoltaic and power grid interactive direct current air conditioner - Google Patents
Power supply system for photovoltaic and power grid interactive direct current air conditioner Download PDFInfo
- Publication number
- CN106712258A CN106712258A CN201710077803.0A CN201710077803A CN106712258A CN 106712258 A CN106712258 A CN 106712258A CN 201710077803 A CN201710077803 A CN 201710077803A CN 106712258 A CN106712258 A CN 106712258A
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- CN
- China
- Prior art keywords
- photovoltaic
- direct current
- air conditioner
- direct
- converters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
-
- 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 invention relates to a power supply system for a photovoltaic and power grid interactive direct current air conditioner. The system is characterized by comprising a photovoltaic battery panel, a twin-channel independent MPPT photovoltaic tracking module and a direct current frequency conversion module, wherein the photovoltaic battery panel is used for converting solar energy into direct current electricity and provides the direct current electricity to the twin-channel independent MPPT photovoltaic tracking module; the twin-channel independent MPPT photovoltaic tracking module is used for boosting the direct current electric output by the photovoltaic battery panel and providing to a direct current air conditioning frequency conversion panel; and the direct current frequency conversion module is used for converting the voltage of the power grid into the direct current electricity and providing the direct current electricity to the direct current air conditioning frequency conversion panel. The system provided by the invention has the advantages that by changing the power supply mode of the direct current air conditioner in the prior art, the power supply function of a photovoltaic preferred power grid complementation is realized without a storage battery and a selector switch; the photovoltaic electric energy and the power grid work in parallel, so that the direct current air conditioner is continuously powered.
Description
Technical field
The present invention relates to field of household appliances, more particularly to a kind of photovoltaic direct-flow air conditioner electric power system interactive with power network.
Background technology
Domestic photovoltaic application needs batteries to store energy and photovoltaic using inverter to air-conditioning common inverter of powering substantially
Controller coordinates can just think that air-conditioning is powered, and system hardware structure is complicated, and hardware investment claims at all too high, and photovoltaic has to pass through multistage
Conversion, the whole machine operating efficiency of power supply is very low, and system failure rate is higher.The shortcoming that the photovoltaic application system of this topology is maximum is
Battery be lost and depreciation be difficult to receive, generally, battery be accomplished by within one, two years change, thus it is this topology
Photovoltaic application system is not suitable for air-conditioning and powers.
The content of the invention
In view of the shortcomings of the prior art, battery and adaptive optical are not needed it is an object of the invention to provide one kind
Lie prostrate the photovoltaic of the preferential power network supplement direct-flow air conditioner electric power system interactive with power network.
The technical proposal of the invention is realized in this way：A kind of photovoltaic direct-flow air conditioner electric power system interactive with power network, its
It is characterised by：Including photovoltaic battery panel, two-way independence MPPT photovoltaic trackings module and DC frequency-changing module, wherein：
Photovoltaic battery panel：For converting the solar into direct current, and it is supplied to two-way independence MPPT photovoltaic tracking modules；
Two-way independence MPPT photovoltaic tracking modules：For being supplied to direct-flow air conditioner after the direct current electric boost that exports photovoltaic battery panel
Frequency conversion board；
DC frequency-changing module：Direct-flow air conditioner frequency conversion board is supplied to for line voltage to be converted into direct current.
Preferably, described two-way independence MPPT photovoltaic trackings module turns including two step-up DC/DC parallel with one another
Parallel operation and central processing unit, the input of each step-up DC/DC converters are connected with central processing unit respectively, and each step-up DC/
The input that the output end of DC converters converges into all the way with direct-flow air conditioner frequency conversion board is connected.
Preferably, described DC frequency-changing module is AC/DC converters.
Preferably, described step-up DC/DC converters include inductance, diode and resistance, inductance, diode, electric capacity
And resistance is sequentially connected in series.
By using above-mentioned technical proposal, by changing power supply mode of the prior art to direct-flow air conditioner, without electric power storage
Pond and switching switch, realize the function of supplying power of the preferential power network supplement of photovoltaic, photovoltaic electric energy and the grid-connected work of power network, and use
Step-up DC/DC converters and AC/DC converters are used in combination, and improve operating efficiency, two-way independence MPPT photovoltaic tracking moulds
Block, the maximum power points of tracking photovoltaic cell, and photovoltaic are prior to power network, power network supplement, photovoltaic battery panel and power network dual power supply
Power supply, realizes to DC frequency converting air-conditioner uninterrupted power supply.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
Other accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is specific embodiment of the invention theory diagram.
Fig. 2 is two-way independence MPPT photovoltaic tracking module principle block diagrams in the specific embodiment of the invention.
Fig. 3 is two-way independence MPPT photovoltaic tracking module circuit diagrams in the specific embodiment of the invention.
Fig. 4 is two-way independence MPPT photovoltaic tracking module PWM pulsewidth figures in the specific embodiment of the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in Fig. 1-Fig. 4, the invention discloses a kind of photovoltaic and the interactive direct-flow air conditioner electric power system of power network, at this
In invention specific embodiment, including photovoltaic battery panel（PV1、PV2）, two-way independence MPPT photovoltaic trackings module 2 and DC frequency-changing
Module, wherein：
Photovoltaic battery panel：For converting the solar into direct current, and it is supplied to two-way independence MPPT photovoltaic tracking modules；
Two-way independence MPPT photovoltaic trackings module 2：It is empty for being supplied to direct current after the direct current electric boost that exports photovoltaic battery panel
Adjust frequency conversion board；
DC frequency-changing module：Direct-flow air conditioner frequency conversion board is supplied to for line voltage to be converted into direct current, then it is empty by direct current
Adjust frequency conversion board to supply electricity to the corresponding matching component of air-conditioning to use.
In the specific embodiment of the invention, the output end of described two-way independence MPPT photovoltaic tracking modules is also associated with electricity
Hold C1.
In the specific embodiment of the invention, described two-way independence MPPT photovoltaic trackings module includes parallel with one another two
Step-up DC/DC converters and central processor CPU, the input of each step-up DC/DC converters respectively with central processing unit
CPU is connected, and the input that the output end of each step-up DC/DC converters is converged into all the way with direct-flow air conditioner frequency conversion board 1 is connected.
In the specific embodiment of the invention, described DC frequency-changing module is AC/DC converters.
As shown in figure 3, in the specific embodiment of the invention, described step-up DC/DC converters include inductance L, two poles
Pipe D and resistance R, inductance L, diode D, electric capacity C1 and resistance R are sequentially connected in series.
By using above-mentioned technical proposal, by changing power supply mode of the prior art to direct-flow air conditioner, without electric power storage
Pond and switching switch, realize the function of supplying power of the preferential power network supplement of photovoltaic, photovoltaic electric energy and the grid-connected work of power network, and use
Step-up DC/DC converters and AC/DC converters are used in combination, and improve operating efficiency.
Wherein, the DC/DC converters of the built-in two-way independence of two-way independence MPPT photovoltaic tracking modules, each with independent
MPPT following functions, are responsible for for photovoltaic voltage entering into direct-flow air conditioner frequency conversion by being stabilized to 380V after the boosting of DC/DC converters
Plate.When photovoltaic abundance is, the electric energy after photovoltaic boosts through DC/DC converters injects direct-flow air conditioner frequency conversion board, and power network turns through AC/DC
The electric energy that direct-flow air conditioner frequency conversion board is injected after parallel operation conversion can be reduced, and this is because DC/DC converters have automatic preferential power supply
Function, the voltage of DC/DC converters boosting output can be from motion tracking and more than the voltage of AC/DC converters output, so that light
Lie prostrate the electric energy of the utilization prior to power network of electric energy；After the electric energy of photovoltaic weakens（Illumination weakens）, by DC/DC converters
After MPPT tracking, the energy reduction of output, the energy of final injection direct-flow air conditioner frequency conversion board is also reduced, and now power network is through AC/DC
The electric energy that direct-flow air conditioner frequency conversion board is injected after converter transform can increase, and complete photovoltaic complementary with the interaction of power network empty to direct current
Frequency conversion board is adjusted to power.
PWM of each DC/DC converter in central processing unit（Pulse width prescription）Under control, boosting output stabilization is completed
380V DC voltages, and the maximal power tracing of photovoltaic is carried out automatically, exported with the ceiling capacity for ensuring photovoltaic.By regulation
The duty ratio of PWM completes the stabilization of output voltage.Computing of the central processing unit according to photovoltaic electric current and photovoltaic operating voltage
Photovoltaic power output is obtained, changes the pulsewidth of PWM, so as to change the output of DC/DC converters（Equal to changing in load
Resistance）, it is final so that the internal resistance of photovoltaic battery panel completes maximal power tracing equal to load impedance.
The advantage that the photovoltaic battery panel of wherein two groups of independences is respectively configured the DC/DC converters of two-way independence is as follows：It is existing
Household roof have north and south both direction direction, referred to as sunny side and the back（Distinguished by illumination condition）If, sunny side and the back
Photovoltaic battery panel be all merged together, because the illumination condition of sunny side and the back is different, the voltage and most of photovoltaic output
High-power point is also different, and being merged can cause the MPPT maximum power point tracking of photovoltaic to fail together, the energy that photovoltaic can be allowed to export
It is greatly reduced；The DC/DC converters of two groups of independences meet sunny side and the series connection of back varying number, different illumination intensity series connection to be made
With.
The technical characterstic of two-way DC/DC converters：
A, as shown in figure 4, staggeredly（Two-way）PWM pulsewidth modulations, make the DC voltage of output more steady, reduce pulsation, such as Fig. 4
Shown, above-mentioned when being staggeredly driven to that wherein peak is opened all the way, another road shut-off intermeshes.
B, automatic homogeneous flow technology for connecting, two-way MPPT are merged as after all the way, each DC/DC converter can be in central processing unit
Under control, each DC/DC converter automatic current equalizing is allowed, that is to say, that the operating current of each DC/DC converter is the same
, be conducive to improving the working life and operating efficiency of DC/DC converters, it is allowed to be operated in optimum state.
C, the DC/DC converters use COOLMOS, support very high-frequency operation, reduce the volume of inductance and hardware into
This, only by improving working frequency, can just realize the module high power density, this be because photovoltaic application is in air-conditioning,
The space of original Air-conditioner design is limited, so volume and operating efficiency very high, the power module body of requirement to DC/DC converters
The small, power density of product is high.
D, input automatic current limiting, DC/DC converters understand volitional check input current to protect the module safety, according to photovoltaic
The tandem working principle of battery, each cell panel has an output current value for maximum, the photovoltaic battery panel of such as 250W
Maximum output current is 8A or so, in order to prevent user error by multiple access, and is loaded simultaneously specified also greater than the module
During power, the module overcurrent overheat can be caused and exception, user is illegal or mistake should due to input automatic current limiting, having prevented
With causing unit exception.
E, flexible input, because the PFC of air-conditioning is also a kind of first class boost mode of operation, if DC/DC converters boost
Output control is not good, will influence can air-conditioning previous stage PFC work, also result in rear stage frequency conversion board exception, the module
Electric energy is injected into direct-flow air conditioner frequency conversion board by flexibility, allows PFC electric energy to exit at leisure, it is ensured that photovoltaic electric energy and electrical network complementation to
Air-conditioning is powered.
F, needn't battery support just meet air-conditioning and power, the photovoltaic application of general air-conditioning needs battery accumulation of energy to match somebody with somebody
Conjunction could work, and the system cleverly organically combines photovoltaic and power network electric energy, it is not necessary to batteries to store energy, reduce
The hardware device cost input of system, when photovoltaic electric energy is sufficient, air-conditioning is powered all can be undertaken by photovoltaic, work as photovoltaic electric
When can be not enough, power network electric energy automatically takes on power supply, and the two electric energy self adaptation complementary duty, seamless exchange is truly realized photovoltaic
Green energy resource is maximum to be utilized.
G, the photovoltaic input of support wide scope, input voltage 50-380V energy normal works, that is to say, that 2-9 can be supported
The photovoltaic battery panel tandem working of piece.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (4)
1. the interactive direct-flow air conditioner electric power system of a kind of photovoltaic and power network, it is characterised in that：Including photovoltaic battery panel, two-way independence
MPPT photovoltaic trackings module and DC frequency-changing module, wherein：
Photovoltaic battery panel：For converting the solar into direct current, and it is supplied to two-way independence MPPT photovoltaic tracking modules；
Two-way independence MPPT photovoltaic tracking modules：For tracking maximum photovoltaic power point, and the direct current that photovoltaic battery panel is exported
Direct-flow air conditioner frequency conversion board is supplied to after electric boost；
DC frequency-changing module：Direct-flow air conditioner frequency conversion board is supplied to for line voltage to be converted into direct current.
2. the interactive direct-flow air conditioner electric power system of photovoltaic according to claim 1 and power network, it is characterised in that：Described is double
Road independence MPPT photovoltaic trackings module includes two step-up DCs/DC converters and central processing unit parallel with one another, each boosting
The input of type DC/DC converters is connected with central processing unit respectively, and the output end of each step-up DC/DC converters is converged into all the way
Input with direct-flow air conditioner frequency conversion board is connected.
3. the interactive direct-flow air conditioner electric power system of photovoltaic according to claim 1 and power network, it is characterised in that：Described is straight
Rheology frequency module is AC/DC converters.
4. the interactive direct-flow air conditioner electric power system of photovoltaic according to claim 2 and power network, it is characterised in that：Described liter
Die mould DC/DC converters include inductance, diode and resistance, and inductance, diode, electric capacity and resistance are sequentially connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710077803.0A CN106712258A (en) | 2017-02-14 | 2017-02-14 | Power supply system for photovoltaic and power grid interactive direct current air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710077803.0A CN106712258A (en) | 2017-02-14 | 2017-02-14 | Power supply system for photovoltaic and power grid interactive direct current air conditioner |
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| CN106712258A true CN106712258A (en) | 2017-05-24 |
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| CN201710077803.0A Pending CN106712258A (en) | 2017-02-14 | 2017-02-14 | Power supply system for photovoltaic and power grid interactive direct current air conditioner |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560039A (en) * | 2017-08-31 | 2018-01-09 | 珠海格力电器股份有限公司 | PV air-conditioner adapter and PV air-conditioner system |
| CN108767842A (en) * | 2018-07-02 | 2018-11-06 | 台州航宁制冷设备有限公司 | A kind of direct-flow air conditioner power supply system of photovoltaic and electrical network complementation |
| CN109039090A (en) * | 2018-09-03 | 2018-12-18 | 珠海格力电器股份有限公司 | Controller, air-conditioning and the method powered using direct current to controller |
| CN109638957A (en) * | 2018-12-29 | 2019-04-16 | 浙江新亚泵业有限公司 | A kind of control system of solar water pump |
| CN110690728A (en) * | 2019-10-14 | 2020-01-14 | 珠海格力电器股份有限公司 | Photovoltaic system and power supply method thereof |
| CN112653226A (en) * | 2019-10-09 | 2021-04-13 | 三垦电设株式会社 | Power supply device and control method thereof |
| CN113028678A (en) * | 2021-03-17 | 2021-06-25 | 广州哈思新能源科技有限公司 | Solar photovoltaic variable-frequency heat pump unit |
| WO2023115924A1 (en) * | 2021-12-20 | 2023-06-29 | 珠海格力电器股份有限公司 | Photovoltaic energy storage circuit and control method thereof, photovoltaic air conditioning system, and photovoltaic air conditioner |
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| CN113028678A (en) * | 2021-03-17 | 2021-06-25 | 广州哈思新能源科技有限公司 | Solar photovoltaic variable-frequency heat pump unit |
| WO2023115924A1 (en) * | 2021-12-20 | 2023-06-29 | 珠海格力电器股份有限公司 | Photovoltaic energy storage circuit and control method thereof, photovoltaic air conditioning system, and photovoltaic air conditioner |
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