CN105262134B - Family receives net system and community-level micro-grid system - Google Patents
Family receives net system and community-level micro-grid system Download PDFInfo
- Publication number
- CN105262134B CN105262134B CN201510746334.8A CN201510746334A CN105262134B CN 105262134 B CN105262134 B CN 105262134B CN 201510746334 A CN201510746334 A CN 201510746334A CN 105262134 B CN105262134 B CN 105262134B
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- Prior art keywords
- grid
- new energy
- bus
- electrical equipment
- energy
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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
- 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
- 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
- H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
-
- 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
- Y02B10/10—Photovoltaic [PV]
Abstract
Net system and community-level micro-grid system are received this application discloses a kind of family, community-level micro-grid system includes that multiple families receive net system, it includes new energy electrical equipment, grid-connected power generation system, two-way DC/DC and energy-storage battery that each family, which receives net system, and the DC bus of new energy electrical equipment is connect with household electrical appliance.The DC bus of new energy electrical equipment can be directly accessed the direct current energy driving of grid-connected power generation system, for more traditional, eliminate the reversals of electric current.Therefore, household electrical appliance can save multiple unsteady flow conversion, to improve energy utilization rate using the DC bus powered compared with directly powering using grid-connected power generation system of new energy electrical equipment.
Description
Technical field
The present invention relates to technical field of power systems, more specifically, be related to a kind of family receive net system and community-level it is micro-
Network system.
Background technology
Micro-capacitance sensor refer to by distributed generation resource, energy storage device, power electronic equipment, load and protective device constitute can
Realize self-contr ol, protection, management small-sized electric system.Micro-capacitance sensor can be incorporated into the power networks with bulk power grid, and when energy deficiency can
Energy is absorbed from bulk power grid, can feed back energy to bulk power grid when energy is abundant.When bulk power grid breaks down power-off, micro-capacitance sensor can
Independent operating powers to the load continuous in region, to improve power supply reliability.Wherein, electric energy is transmitted with form of communication
It is exchange micro-capacitance sensor, what it is with DC form transmission is direct-current grid.
The structure of existing typical direct-current grid is as shown in Figure 1, photovoltaic 01 passes through DC/DC (DC conversion device) 001
It is connected to DC bus, wind energy 02 is connected to DC bus by AC/DC (AC-DC converter) 002, and energy storage device 03 is logical
It crosses DC/DC003 and is connected to DC bus, then realized by independent AC/DC004 and connect with bulk power grid 04.This direct current is micro-
Power grid is powered by DC/AC (DC-AC converter) 005 to AC load 05, or by DC/DC006 to DC load
06 power supply, or power directly to DC load 07.But it can not directly utilize the DC load of direct-current grid for certain
For household electrical appliance, direct current need to be passed through and deliver the conversion that stream turns direct current again, that is, need additionally to increase inverter.Exchange micro-capacitance sensor
At present apply it is commonplace, when powering for household electrical appliance, for the new energy such as photovoltaic need to pass through multiple unsteady flow could meet confession
Electricity demanding.
It in summary it can be seen, new energy, which need to pass through multiple unsteady flow when powering to household electrical appliance, to be converted, therefore, electric energy loss
Larger, efficiency of energy utilization is not high.
Invention content
In view of this, the present invention, which provides a kind of family, receives net system and community-level micro-grid system, new energy is used to realize
When source is that household electrical appliance are powered, energy utilization rate is improved.
A kind of family receives net system, including：
New energy electrical equipment, the new energy electrical equipment have and can be connect with household electrical appliance, and can be the family
The DC bus of electrical appliance power supply；
The grid-connected power generation system being connect with the new energy electrical equipment；
Two-way DC/DC；
The DC bus is accessed by the two-way DC/DC, and can be filled under the control of the two-way DC/DC
The energy-storage battery of electric discharge.
Preferably, further include：
Input terminal is connect with the DC bus, and output end is connect with the household electrical appliance, can change busbar voltage
At the DC/DC for the voltage class that can be directly utilized by the household electrical appliance.
Preferably, further include：
Charging pile；
By the charging pile incoming transport busbar, and the automobile of charge and discharge can be carried out under the control of the charging pile
Accumulator.
Preferably, the grid-connected power generation system is connect with the DC bus.
Preferably, the new energy electrical equipment is PV air-conditioner.
A kind of community-level micro-grid system, including：Multiple families receive net system, and each family receives new energy in net system
The DC bus side of electrical equipment interconnects, exchange side interconnection.
It can be seen from the above technical scheme that receiving net system and community-level micro-capacitance sensor system the present invention provides a kind of family
System, community-level micro-grid system include that multiple families receive net system, each family receive net system include new energy electrical equipment, it is new
Energy electricity generation system, two-way DC/DC and energy-storage battery, the DC bus of new energy electrical equipment are connect with household electrical appliance.New energy
The DC bus of source electrical equipment can be directly accessed the direct current energy driving of grid-connected power generation system, for more traditional, eliminate
The reversals of electric current.Therefore, household electrical appliance use new energy using the DC bus powered of new energy electrical equipment and directly
Electricity generation system power supply is compared, and multiple unsteady flow conversion can be saved, to improve energy utilization rate.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of direct-current grid disclosed in prior embodiment；
Fig. 2 is that a kind of family disclosed by the embodiments of the present invention receives the structural schematic diagram of net system；
Fig. 3 is that another family disclosed by the embodiments of the present invention receives the structural schematic diagram of net system；
Fig. 4 is a kind of structural schematic diagram of community-level micro-grid system disclosed by the embodiments of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Net system and community-level micro-grid system are received the embodiment of the invention discloses a kind of family, and new energy is used to realize
When powering for household electrical appliance, energy utilization rate is improved.
Referring to Fig. 2, the structural schematic diagram of net system is received the embodiment of the invention discloses a kind of family, including：
New energy electrical equipment 11, grid-connected power generation system 12, two-way DC/DC (i.e. bidirectional, dc converter plant) 13 and storage
It can battery 14；
Wherein,
New energy electrical equipment 11 has and can be connect with household electrical appliance 10, and can be that the direct current that household electrical appliance 10 are powered is female
Line.
Grid-connected power generation system 12 is connect with new energy electrical equipment 11, for being provided for the new energy electrical equipment 11
Electric energy.
It should be noted that the DC current that the DC bus of new energy electrical equipment 11 can be directly accessed new energy drives
It is dynamic, it is more traditional to need by for DC-AC-direct current, inverter saved.
Energy-storage battery 14 by two-way DC/DC13 with regard to the DC bus, and can under the control of two-way DC/DC13 into
Row charge and discharge.
Wherein, when the electric energy that grid-connected power generation system 12 generates can meet 10 power demand of household electrical appliance and have surplus
When, grid-connected power generation system 12 is preferentially charged by two-way DC/DC13 for energy-storage battery 14, (straight by DC/AC again after being full of
Stream-a-c transducer) inversion connects AC network；It is used when the electric energy that grid-connected power generation system 12 generates cannot be satisfied household electrical appliance 10
Be that household electrical appliance 10 are powered by energy-storage battery 14 when electricity demanding, when energy-storage battery 14 SOC (State of Charge, it is charged
State) when being less than predetermined threshold value, protect energy-storage battery 14 not to be damaged, powered at this time for household electrical appliance 10 by AC network.
It in summary it can be seen, the DC bus of new energy electrical equipment 11 can be directly accessed the straight of grid-connected power generation system 12
Electrical energy drive is flowed, for more traditional, eliminates the reversals of electric current.Therefore, household electrical appliance 10 use new energy electrical equipment
11 it is DC bus powered compared with directly being powered using grid-connected power generation system 12, the conversion of multiple unsteady flow can be saved, to
Improve energy utilization rate.
It is DC power supply power supply inside most of household electrical appliance currently on the market, it is straight using the DC bus in the application
It connects and powers to household electrical appliance 10, the rectification circuit inside household electrical appliance 10 can be saved, to reduce unsteady flow conversion raising energy
While source utilization rate, itself with regard to household electrical appliance 10, rectification circuit cost can also be saved.
Preferably, new energy electrical equipment 11 is PV air-conditioner, and grid-connected power generation system 12 is photovoltaic generating system.
Grid-connected power generation system 12 is connect with new energy electrical equipment 11 by DC bus.
It should be noted that when the voltage class of DC bus electric appliance 10 suitable for home use, household electrical appliance 10 directly with directly
Flow busbar connection；When the voltage class of DC bus is not suitable for household electrical appliance 10, household electrical appliance 10 are female by DC/DC and direct current
Line connects.
Therefore, in order to further optimize the above embodiments, referring to Fig. 3, a kind of family disclosed in another embodiment of the present invention receives
The structural schematic diagram of net system on the basis of embodiment shown in Fig. 1, further includes：DC/DC15；
The input terminal of DC/DC15 is connect with DC bus, and output end is connect with household electrical appliance 10, and DC/DC15 can will be female
Line voltage is transformed into the voltage class that can be directly utilized by household electrical appliance 10.
In order to further optimize the above embodiments, further including：Charging pile 16 and automobile storage battery 17；
Automobile storage battery 17 can carry out charge and discharge by 16 incoming transport busbar of charging pile under the control of charging pile 16
Electricity.
Wherein,
It is functionally similar to the fuel charger inside gas station to charging pile 16, can be fixed on ground or wall, be installed on public affairs
It builds together and builds in (public building, market, Public Parking etc.) and residential area parking lot or charging station, it can be according to different electricity
The electric vehicle that grade is various models is pressed to charge.The input terminal of charging pile 16 is directly connected to AC network, and output end all fills
Have charging plug for for electric vehicle charging.
Therefore, when the SOC of energy-storage battery 14 is less than predetermined threshold value, automobile storage battery 17 can be used as the benefit of energy-storage battery 14
It fills, continues as the power supply of household electrical appliance 10, the power supply reliability of net system is received so as to further increase family.
It should be noted that supplement accumulator includes singly being not limited solely to automobile storage battery 17.
Independent family receives net system and is generally all connected to single energy-storage battery 14, due to energy-storage battery 14 capacity compared with
It is small, therefore, it is impossible to which meeting family receives the prolonged independent operating of net system.For this disadvantage, the present invention also provides one kind
Community-level micro-grid system.
Referring to Fig. 4, a kind of structural schematic diagram of community-level micro-grid system disclosed by the embodiments of the present invention, including：It is multiple
Family receives net system (only showing two in Fig. 3, respectively family receives net system 31 and family receives net system 32), and each family receives net
The DC bus side interconnection of new energy electrical equipment, exchange side interconnection in system.
As can be seen that community-level micro-grid system provided by the invention by by multiple families receive net system interconnection, formed
One distributed energy storing structure, each energy-storage battery 14 are complementary to one another, and increase the energy storage gross energy of community-level micro-grid system, from
And ensure that important load can long-time independent operating in community-level micro-capacitance sensor.
It is interconnected by the way that multiple families are received the DC bus side of new energy electrical equipment in net system, exchange side interconnection, shape
At an alternating current-direct current dual network mixing micro-grid system, due to there is a small number of electric appliances such as electric rotating machine class to load in household electrical appliance 10
For Alternating Current Power Supply, therefore, AC network can as the supplement of DC network, to improve entire micro-grid system power supply can
By property.
It should be noted that improve the economy of micro-grid system overall operation, the energy-storage battery 14 largely disperseed is excellent
It is household electrical appliance power supply nearby to be first.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that
A little elements, but also include other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to 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, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (4)
1. a kind of family receives net system, which is characterized in that including：
New energy electrical equipment, the new energy electrical equipment have and can be connect with household electrical appliance, and can be the household electric
The DC bus of device power supply, wherein the new energy electrical equipment is PV air-conditioner；
The grid-connected power generation system being connect with the new energy electrical equipment, the grid-connected power generation system and the DC bus
Connection；
Two-way DC/DC；
The DC bus is accessed by the two-way DC/DC, and charge and discharge can be carried out under the control of the two-way DC/DC
Energy-storage battery.
2. family according to claim 1 receives net system, which is characterized in that further include：
Input terminal is connect with the DC bus, and output end is connect with the household electrical appliance, can busbar voltage be transformed into energy
The DC/DC of enough voltage class directly utilized by the household electrical appliance.
3. family according to claim 1 receives net system, which is characterized in that further include：
Charging pile；
By the charging pile incoming transport busbar, and the automobile electric power storage of charge and discharge can be carried out under the control of the charging pile
Pond.
4. a kind of community-level micro-grid system, which is characterized in that including：Multiple families receive net system, and each family receives net system
The DC bus side interconnection of new energy electrical equipment, exchange side interconnection in system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510746334.8A CN105262134B (en) | 2015-11-04 | 2015-11-04 | Family receives net system and community-level micro-grid system |
| PCT/CN2016/103204 WO2017076192A1 (en) | 2015-11-04 | 2016-10-25 | Home nano-network system and community-level microgrid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510746334.8A CN105262134B (en) | 2015-11-04 | 2015-11-04 | Family receives net system and community-level micro-grid system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105262134A CN105262134A (en) | 2016-01-20 |
| CN105262134B true CN105262134B (en) | 2018-09-07 |
Family
ID=55101690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510746334.8A Active CN105262134B (en) | 2015-11-04 | 2015-11-04 | Family receives net system and community-level micro-grid system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105262134B (en) |
| WO (1) | WO2017076192A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262134B (en) * | 2015-11-04 | 2018-09-07 | 珠海格力电器股份有限公司 | Family receives net system and community-level micro-grid system |
| CN109301824B (en) * | 2018-11-15 | 2022-07-12 | 清能华控科技有限公司 | Zero-disturbance flexible power distribution system based on double-circuit system power supply support |
| DE102019112228A1 (en) * | 2019-05-10 | 2020-11-12 | Bayerische Motoren Werke Aktiengesellschaft | Device, method and cable for feeding electrical energy into an energy network based on a mobile energy storage device |
| CN111817342B (en) * | 2020-06-24 | 2022-03-22 | 淮阴工学院 | Intelligent household system powered by solar energy |
| CN112803445B (en) * | 2021-01-13 | 2024-04-12 | 阳光电源股份有限公司 | Wind storage system and control method thereof |
| CN112803480A (en) * | 2021-01-13 | 2021-05-14 | 阳光电源股份有限公司 | Optical storage system and control method thereof |
| CN114884116A (en) * | 2022-06-07 | 2022-08-09 | 国网湖北综合能源服务有限公司 | Power circuit, new energy control system and energy coordination method |
| CN116826848B (en) * | 2023-08-30 | 2023-11-07 | 大秦数字能源技术股份有限公司 | Energy control method for direct current coupling island system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105262134A (en) | 2016-01-20 |
| WO2017076192A1 (en) | 2017-05-11 |
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