CN105552878B - DC micro-electric web frame - Google Patents
DC micro-electric web frame Download PDFInfo
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- CN105552878B CN105552878B CN201510996135.2A CN201510996135A CN105552878B CN 105552878 B CN105552878 B CN 105552878B CN 201510996135 A CN201510996135 A CN 201510996135A CN 105552878 B CN105552878 B CN 105552878B
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- micro
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- storage device
- energy storage
- electric
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Classifications
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- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention discloses a kind of DC micro-electric web frame, the dc bus opened using the frequency converter of electrical equipment, it is directly accessed photovoltaic distributed power supply, direct-current grid directly can access utility grid by the airborne frequency converter of electrical equipment, so as to which direct-current grid is not required extra DC/AC converters can be grid-connected with alternating current, compared with traditional DC micro-electric web frame, parallel network reverse device is saved.And, electrical equipment, charging pile and two-way DC/DC these three nodes can form loop network, each node has two supply terminals, such as side line fault maintenance etc., opposite side can also continue to as node power transmission, compared with the structure of traditional direct-current grid, there is the power supply reliability of higher.
Description
Technical field
The present invention relates to micro-capacitance sensor technical field, more specifically to a kind of household DC micro-capacitance sensor structure.
Background technology
At present household DC micro-capacitance sensor typical structure as shown in Figure 1, it is all distribution micro battery (e.g., the direct current such as photovoltaic is micro-
The exchange such as power supply, wind energy micro battery, etc.), load etc. passes through Technics of Power Electronic Conversion device (DC/DC converters, AC/DC becomes
Parallel operation, DC/AC converters etc.), direct-current grid accesses electricity network by inverter, so as to grid-connected with electricity network
Operation, can also independent operating.Direct-current grid can exchanging, directly to different voltages grade by Technics of Power Electronic Conversion device
Stream load provides electric energy.
Inventor has found that above-mentioned DC micro-electric web frame cost of implementation is higher in the implementation of the present invention.
The content of the invention
The object of the present invention is to provide a kind of DC micro-electric web frame, to reduce the cost of implementation of DC micro-electric web frame.
To achieve the above object, the present invention provides following technical solution：
A kind of DC micro-electric web frame, including：
Electrical equipment, the electrical equipment includes AC/DC converters, and is changed by dc bus and the AC/DC
The DC/AC converters of device connection；
Micro battery, the dc bus is accessed by Technics of Power Electronic Conversion device；
The charging pile being connected with the ac input end of the AC/DC converters, the AC/DC converters and the charging pile
Public termination electricity network, the output terminal of the charging pile is used to be electrically connected with first kind energy storage device；
It is respectively connected to the two-way DC/DC converters of the dc bus of the electrical equipment and unidirectional DC/DC converters；
The output terminal of the charging pile and the output terminal of the two-way DC/DC converters are connected by switching, described two-way
The output terminal of DC/DC converters is additionally operable to be connected with the second class energy storage device.
Above-mentioned DC micro-electric web frame, it is preferred that the electrical equipment includes：PV air-conditioner device.
Above-mentioned DC micro-electric web frame, it is preferred that the charging pile is for for the vehicle-mounted battery charging of electric automobile
Charging pile.
Above-mentioned DC micro-electric web frame, it is preferred that the micro battery includes：Photovoltaic cell group；
The photovoltaic cell group accesses the dc bus by unidirectional DC/DC converters.
Above-mentioned DC micro-electric web frame, it is preferred that the micro battery includes：Small wind unit；
The small wind unit accesses the dc bus by unidirectional AC/DC converters.
Above-mentioned DC micro-electric web frame, it is preferred that the output terminal of the two-way DC/DC converters is specifically used for storing with family expenses
Battery pack connects.
Above-mentioned DC micro-electric web frame, it is preferred that further include：
Energy management and control system, for being managed to alternating current electric energy, micro battery electric energy and energy storage device electric energy and
Control；The energy storage device includes first kind energy storage device and the second class energy storage device.
By above scheme, a kind of DC micro-electric web frame of the application offer, utilizes the frequency converter of electrical equipment
Open dc bus, is directly accessed photovoltaic distributed power supply, and direct-current grid can directly pass through the airborne of electrical equipment
Frequency converter accesses utility grid, so that direct-current grid is not required extra DC/AC converters can be grid-connected with alternating current, with biography
The DC micro-electric web frame of system is compared, and is saved parallel network reverse device, is reduced cost of implementation.Moreover, electrical equipment, charging pile and
These three nodes of two-way DC/DC can form loop network, and each node has two supply terminals, in case of side line fault is examined
Repair, opposite side can also continue to as node power transmission, and compared with the structure of traditional direct-current grid, the power supply with higher can
By property.
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
There is attached drawing needed in technology description to be 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 creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is household DC micro-capacitance sensor typical structure schematic diagram in the prior art；
Fig. 2 is the schematic diagram of DC micro-electric web frame provided by the embodiments of the present application；
Fig. 3 is the ring topologies schematic diagram of direct-current grid provided by the embodiments of the present application.
Term " first ", " second ", " the 3rd " " the 4th " in specification and claims and above-mentioned attached drawing etc. (if
In the presence of) it is for distinguishing similar part, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so that embodiments herein described herein can be in addition to illustrating here
Order implement.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of not making the creative labor
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 2, Fig. 2 is a kind of schematic diagram of DC micro-electric web frame provided by the embodiments of the present application, wherein, dotted line
Represent alternating current path, solid line represents DC channel, and direct-current grid provided by the embodiments of the present application can include：
Electrical equipment 11, micro battery 12, charging pile 13, two-way DC/DC converters 14 and unidirectional DC/DC converters 15；Its
In,
Electrical equipment 11 includes AC/DC converters 111, DC/AC converters 112, AC/DC converters 111 and DC/AC conversions
Device 112 is electrically connected by dc bus.
The electrical equipment can be the electrical equipment for having AC and DC hybrid transmission system, and usual AC and DC hybrid transmission system includes AC/DC
Converter, DC/AC converters and dc bus connecting the two.
AC/DC converters 111 are two-way AC/DC converters.
Micro battery 12 accesses above-mentioned dc bus by Technics of Power Electronic Conversion device.
Wherein, micro battery 12 can have one, it is possibility to have and it is multiple, it can include：Photovoltaic cell group, small size wind turbine
Group.Can also be including miniature gas turbine etc..
It is different that the type of electric energy is exported according to micro battery 12, accesses Technics of Power Electronic Conversion used in above-mentioned dc bus
Device is also different.
If micro battery 12 exports alternating current, micro battery 12 accesses above-mentioned dc bus by unidirectional AC/DC converters.
If micro battery 12 exports direct current, micro battery 12 accesses above-mentioned dc bus by unidirectional DC/DC converters.
Charging pile 13 is connected with the ac input end of AC/DC converters 111, the public affairs of charging pile 13 and AC/DC converters 111
Terminate electricity network altogether, the output terminal of charging pile 13 is used to be electrically connected with first kind energy storage device, i.e., charging pile 13 is for being the
A kind of energy storage device charging.
In the present embodiment, electricity network output electric energy can not only power to electrical equipment 11, but also can be given by charging pile
First kind energy storage device charges, and can also give the electric rotating machine class load supplying that can not use direct current supply.
Two-way DC/DC converters 14 and unidirectional DC/DC converters 15 are also respectively connected to above-mentioned dc bus.
The output terminal of two-way DC/DC converters 14 is connected with the output terminal of charging pile 13 by switching K, and two-way DC/DC turns
The output terminal of parallel operation 14 is additionally operable to be connected with the second class energy storage device.
, can be with closure switch K when the voltage class of first kind energy storage device and the second class energy storage device is equal so that the
A kind of energy storage device and the second class energy storage device are connected in parallel so that DC micro-electric web frame is changed by original radial structure
For loop network structure.As shown in figure 3, the ring topologies schematic diagram for direct-current grid provided in an embodiment of the present invention.
When above-mentioned switch K is closed, DC micro-electric web frame is at the same time to first kind energy storage device and the second class energy storage device
Carry out alternating current-direct current to palm off as, i.e. first kind energy storage device and the second class energy storage device can both be filled by two-way DC/DC using direct current
Electricity, and can be charged by automobile charging pile with exchange.Compared compared to single energy storage device charging, add storage
Can total capacity.
The electric energy of unidirectional 15 output of DC/DC converters is used as household electricity, i.e., the output of unidirectional DC/DC converters 15
End is used to connect household electrical appliance.
DC micro-electric web frame provided in an embodiment of the present invention, the dc bus opened using the frequency converter of electrical equipment,
Photovoltaic distributed power supply is directly accessed, direct-current grid directly can access alternating current electricity by the airborne frequency converter of electrical equipment
Net, so that direct-current grid is not required extra DC/AC converters can be grid-connected with alternating current, with traditional direct-current grid knot
Structure is compared, and is saved parallel network reverse device, is reduced cost of implementation.Moreover, electrical equipment, charging pile and two-way DC/DC these three
Node can form loop network, and each node has two supply terminals, and such as side line fault maintenance etc., opposite side may be used also
To continue as node power transmission, compared with the structure of traditional direct-current grid, there is the power supply reliability of higher.
Optionally, electrical equipment 11 can be PV air-conditioner device, which includes frequency converter, which has
Open dc bus, the dc bus connect AC/DC converters and DC/AC converters respectively.
Optionally, charging pile 13 is for the charging pile for the vehicle-mounted battery charging of electric automobile.
Optionally, if micro battery 12 is photovoltaic cell group, photovoltaic cell group accesses electric appliance by unidirectional DC/DC converters
11 dc bus in equipment.
Optionally, if micro battery 12 is small wind unit, small wind unit is accessed by unidirectional AC/DC converters
Dc bus in electrical equipment 11.
Optionally, the output terminal of two-way DC/DC converters is specifically used for being connected with Household accumulation pond group.That is the second class energy storage
Device can be Household accumulation pond group.Also just say, the electric energy of the second class energy storage device storage is used to power for household electrical appliance.
Optionally, DC micro-electric web frame provided in an embodiment of the present invention can also include：
Energy management and control system, for being managed to alternating current electric energy, micro battery electric energy and energy storage device electric energy and
Control；Wherein, energy storage device includes first kind energy storage device and the second class energy storage device.
Optionally, energy management and control system can be managed and control to the energy in the following way：
In direct-current grid normal operation, what household electrical appliance (including electrical equipment 11) were preferentially exported using micro battery 12
Electric energy, when the electric energy that micro battery 12 exports is insufficient, reuses the electric energy of energy storage device storage, when micro battery 12 and energy storage device
When the electric energy of storage is insufficient, alternating current electric energy is reused.
When micro battery 12 export electric energy remove be used for household electrical appliance (including electrical equipment 11) in addition to, also have more than needed when, preferentially
Give energy storage device charging, after energy storage device is full of, then to electricity network feed back.
When the second class energy storage device accesses DC micro-electric web frame, if the electric energy that micro battery 12 exports, which removes, is used for household electric
Device (including electrical equipment 11) also has outside has more than needed, and directly charges to the second class energy storage device；If the electric energy that micro battery 12 exports is not
Foot, then provide electric energy using first kind energy storage device as the supplement of the second class energy storage device；And if the second class energy storage device accesses
During DC micro-electric web frame, second class energy storage device electricity itself is below low battery threshold value, and micro battery 12 exports
Electric energy deficiency, is directly charged by electricity network for the second class energy storage device at this time.
The access of first kind energy storage device not only forms cricoid supply network, the also benefit as Household accumulation pond group
Fill, further improve the reliability (i.e. continuity) of system power supply.
In addition, energy management and control system can also select charging modes according to time-of-use tariffs, the charging modes bag
Include：AC charging and DC charging.
When micro battery 12 export electric energy remove be used for household electrical appliance (including electrical equipment 11) in addition to, also have more than needed when, according to
The selection of electricity network time-of-use tariffs is charged to energy storage device, or inversion online.Specifically, if electricity price is attached in peak value at this time
Closely, then the unnecessary electric energy inversion of micro battery 12 is surfed the Internet, so as to strive for the economic benefit of maximum, if electricity price is attached in valley
Closely, then preferentially charge to energy storage device.
, can when the electric energy that micro battery 12 exports is insufficient for load use (the electric energy deficiency that i.e. micro battery 12 exports)
It is to be powered by energy storage device or powered by electricity network to be selected according to time-of-use tariffs.Specifically, if electricity price is near peak value,
Then preferential using energy storage device is load supplying, and when capacity of energy storing device, less than threshold value, (electric energy that i.e. energy storage device is stored is not
Foot) when, reuse electricity network power supply；If electricity price can be load supplying directly using electricity network near valley.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (7)
- A kind of 1. DC micro-electric web frame, it is characterised in that including：Electrical equipment, the electrical equipment includes AC/DC converters, and is connected by dc bus and the AC/DC converters The DC/AC converters connect；Micro battery, the dc bus is accessed by Technics of Power Electronic Conversion device；The charging pile being connected with the ac input end of the AC/DC converters, the public affairs of the AC/DC converters and the charging pile Electricity network is terminated altogether, and the output terminal of the charging pile is used to be electrically connected with first kind energy storage device；It is respectively connected to the two-way DC/DC converters of the dc bus of the electrical equipment and unidirectional DC/DC converters；The output terminal of the charging pile is connected with the output terminal of the two-way DC/DC converters by switching K, the two-way DC/ The output terminal of DC converters is additionally operable to be connected with the second class energy storage device；Wherein, can be with closure switch K when the voltage class of first kind energy storage device and the second class energy storage device is equal so that First kind energy storage device and the second class energy storage device are connected in parallel so that DC micro-electric web frame is become by original radial structure More loop network structure.
- 2. DC micro-electric web frame according to claim 1, it is characterised in that the electrical equipment includes：PV air-conditioner Device.
- 3. DC micro-electric web frame according to claim 1, it is characterised in that the charging pile is for for electric automobile The charging pile of Vehicular accumulator cell group charging.
- 4. DC micro-electric web frame according to claim 1, it is characterised in that the micro battery includes：Photovoltaic cell group；The photovoltaic cell group accesses the dc bus by the unidirectional DC/DC converters of Technics of Power Electronic Conversion device.
- 5. DC micro-electric web frame according to claim 1, it is characterised in that the micro battery includes：Small size wind turbine Group；The small wind unit accesses the dc bus by the unidirectional AC/DC converters of Technics of Power Electronic Conversion device.
- 6. DC micro-electric web frame according to claim 1, it is characterised in that the output of the two-way DC/DC converters End is specifically used for being connected with Household accumulation pond group.
- 7. DC micro-electric web frame according to claim 1, it is characterised in that further include：Energy management and control system, for alternating current electric energy, micro battery electric energy and energy storage device electric energy to be managed and controlled； The energy storage device includes first kind energy storage device and the second class energy storage device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510996135.2A CN105552878B (en) | 2015-12-24 | 2015-12-24 | DC micro-electric web frame |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510996135.2A CN105552878B (en) | 2015-12-24 | 2015-12-24 | DC micro-electric web frame |
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| CN105552878A CN105552878A (en) | 2016-05-04 |
| CN105552878B true CN105552878B (en) | 2018-04-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026337A (en) * | 2016-05-30 | 2016-10-12 | 广东港博电力科技有限公司 | Environment-friendly charging pile with hybrid electric power generation system |
| CN109149548A (en) * | 2018-07-27 | 2019-01-04 | 珠海格力电器股份有限公司 | Regional Energy management method, managing device and regional power grid |
| CN109185183B (en) * | 2018-09-20 | 2024-03-12 | 珠海格力电器股份有限公司 | Air supply device |
| CN109149710A (en) * | 2018-09-20 | 2019-01-04 | 珠海格力电器股份有限公司 | Using battery powered household electrical appliance |
| CN110829407A (en) * | 2019-12-13 | 2020-02-21 | 北京新城绿源科技发展有限公司 | Distributed multi-bus direct-current micro-grid system |
| CN113708425A (en) * | 2021-08-24 | 2021-11-26 | 深圳供电局有限公司 | Direct current micro-grid system and intelligent direct current cabinet thereof |
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| CN105552878A (en) | 2016-05-04 |
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