CN206742872U - A kind of DC micro power grid system based on hybrid energy-storing - Google Patents
A kind of DC micro power grid system based on hybrid energy-storing Download PDFInfo
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- CN206742872U CN206742872U CN201720472402.0U CN201720472402U CN206742872U CN 206742872 U CN206742872 U CN 206742872U CN 201720472402 U CN201720472402 U CN 201720472402U CN 206742872 U CN206742872 U CN 206742872U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/14—District level solutions, i.e. local energy networks
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Abstract
The utility model discloses a kind of DC micro power grid system based on hybrid energy-storing, including：Grid-connection converter, photovoltaic array, super capacitor, battery, two-way DC DC converters, with electric loading and switch, wherein, direct-current grid uses two-stage DC bus structure, dc bus BUS1 interconnects through grid-connection converter and AC network, photovoltaic array accesses BUS1 through unidirectional DC DC converters, super capacitor is directly connected with BUS1, battery is connected by two-way DC DC converters with BUS1, hand over, DC load accesses dc bus BUS2 by corresponding converter, BUS2 is connected by switching K1 with BUS1, battery is connected by switching K2 with BUS2, coordinated by K1 and K2 opening and closing, micro-capacitance sensor structure can be changed, to adapt to different operation demands.The utility model simplifies micro-capacitance sensor structure, reduces energy conversion link, improves power supply quality and power supplying efficiency.
Description
Technical field
A kind of DC micro power grid system based on hybrid energy-storing is the utility model is related to, belongs to new energy control with applying skill
Art field.
Background technology
In order to solve the problems, such as that there has been proposed the general of micro-capacitance sensor using photovoltaic and blower fan as the access of the distributed power source of representative
Read.Micro-capacitance sensor includes exchange micro-capacitance sensor and direct-current grid, as application of the Power Electronic Technique in power system is increasingly wide
General, direct-current grid obtains more and more because it is in the advantage of control complexity, reliability, efficiency and cost etc.
Concern.Because distributed power source and load are respectively provided with randomness, it is therefore desirable to increase energy storage device in direct-current grid, with
Guarantee system it is stable.In order to meet system to demand, generally use energy of both energy and power simultaneously
The form that type energy storage and power-type energy storage are combined, form mixed energy storage system.
However, in existing DC micro-electric web frame, the device such as distributed power source, accumulation power supply, load needs to pass through
Dc bus in respective converter access system, this connected mode not only increase the energy conversion link in system,
The power supplying efficiency of system is reduced, while also increases the complexity of system control, for mixed energy storage system therein, increase
The difficulty of cooperation between different energy storage devices.
Therefore, it is new based on its system composition and the method for operation, research for the direct-current grid accessed containing distributed power source
Direct-current grid topological structure, for improve system power supplying efficiency, simplify system control and energy management there is important meaning
Justice.
Utility model content
A kind of the defects of the purpose of the utility model is to overcome prior art, there is provided DC micro-electric based on hybrid energy-storing
Net system, the mixed energy storage system coordinated using battery and super capacitor, super capacitor can improve the dynamic response of system
Speed, improves system run all right, at the same can smooth battery current, extend the cycle life of battery.
In order to solve the above technical problems, the utility model provides a kind of DC micro power grid system based on hybrid energy-storing, bag
Include grid-connection converter, photovoltaic array, super capacitor, battery, bidirectional DC-DC converter, several use electric loading and switch；Institute
State direct-current grid and use two-stage DC bus structure, including dc bus BUS1 and dc bus BUS2, the dc bus
BUS1 is interconnected by grid-connection converter and AC network, and the photovoltaic array accesses dc bus by single-phase DC-DC converter
BUS1, the super capacitor are directly connected with dc bus BUS1, and the dc bus BUS1 is through bidirectional DC-DC converter with storing
Battery is connected, and described several access dc bus BUS2 with electric loading by respective converter, and the dc bus BUS2 leads to
Cross switch K1 with dc bus BUS1 to be connected, the dc bus BUS2 is connected by switching K2 with battery.
Foregoing grid-connection converter is two-way DC-AC converters.
Foregoing single-phase DC-DC converter uses Boost topological structures.
What foregoing electric loading included DC form uses electric loading with electric loading and form of communication.
Foregoing DC form accesses dc bus BUS2 with electric loading by single-phase DC-DC converter.
Foregoing form of communication accesses dc bus BUS2 with electric loading by single-phase DC-AC converters.
Compared with prior art, the beneficial effects of the utility model are：
DC micro power grid system of the present utility model based on hybrid energy-storing, there is advantages below：
1）The mixed energy storage system that battery and super capacitor coordinate is employed, super capacitor can improve the dynamic of system
Response speed, improves system run all right, at the same can smooth battery current, extend the cycle life of battery；
2）Only have the interconnection of one-level DC-DC converter, therefore the two in mixed energy storage system, between battery and super capacitor
Cooperation only need by controlling this bidirectional DC-DC converter to realize, avoid using each ring during multistage DC-DC conversion
The mutual cooperation problem of section, improves conversion efficiency, simplifies control difficulty；
3）The utility model is simple in construction, easy to control, has broad application prospects.
Brief description of the drawings
Fig. 1 is the DC micro power grid system block diagram of the present utility model based on hybrid energy-storing；
Fig. 2 is the equivalent circuit diagram that direct-current grid of the present utility model is run under grid-connect mode；
Fig. 3 is the equivalent circuit diagram that direct-current grid of the present utility model is run under off-network pattern；
It is equivalent when off-network pattern and photo-voltaic power supply inactivity export that Fig. 4 is that direct-current grid of the present utility model is run on
Circuit diagram.
Embodiment
The utility model is further described below.Following examples are only used for clearly illustrating the utility model
Technical scheme, and the scope of protection of the utility model can not be limited with this.
As shown in figure 1, the DC micro power grid system of the present utility model based on hybrid energy-storing, including grid-connection converter, light
Photovoltaic array（Photovoltaic array A and photovoltaic array B in Fig. 1）, super capacitor, battery, DC-DC converter, with electric loading, switch
And bus.Wherein, direct-current grid uses two-stage DC bus structure, and dc bus BUS1 passes through grid-connection converter and alternating current
Net interconnection, photovoltaic array A and photovoltaic array B access dc bus BUS1 by respective DC-DC converter, super capacitor directly with
Dc bus BUS1 is connected, and dc bus BUS1 is connected through bidirectional DC-DC converter with battery, with electric loading by each becoming
Parallel operation accesses dc bus BUS2, and dc bus BUS2 is connected by switching K1 with dc bus BUS1, and dc bus BUS2 leads to
Switch K2 is crossed with battery to be connected.By the way that switch K1 and K2 is opened or closed, thus it is possible to vary the topological structure of direct-current grid, with
Adaptive system difference running status.
As shown in figure 1, direct-current grid is interconnected using two-way DC-AC converters and AC network, direct-current grid has
Grid-connected and two kinds of methods of operation of off-network, by controlling two-way DC-AC converters, energy can be in AC network and direct-current grid
Between realize two-way flow.
As shown in figure 1, the photovoltaic array A and photovoltaic array B in direct-current grid pass through respective single-phase DC-DC converter
Dc bus BUS1 is accessed, single-phase DC-DC converter can use Boost topological structures.
As shown in figure 1, being powered with electric loading by respective converter in direct-current grid, is included with electric loading
The load of DC form and the load of form of communication.Load for DC form, supplied by single-phase DC-DC converter
Electricity；Load for form of communication, it is powered by single-phase DC-AC converters.Using this power supply mode, can not only carry
The power supply quality of high capacity, and allow system dc busbar voltage to fluctuate within the specific limits, reduce direct-current grid mother
The control difficulty of line voltage.
When direct-current grid is connected with AC network, and photovoltaic array A and photovoltaic array B can send power,
Direct-current grid can be equivalent to system shown in Fig. 2 using the method for operation for switching K1 closures, switch K2 disconnects, direct-current grid
System.
When direct-current grid and AC network disconnect, and photovoltaic array A and photovoltaic array B can send power,
Direct-current grid can be equivalent to system shown in Fig. 3 using the method for operation for switching K1 closures, switch K2 disconnects, direct-current grid
System.
When direct-current grid and AC network depart from, and photovoltaic array A and photovoltaic array B can not send power,
Direct-current grid can be equivalent to system shown in Fig. 4 using the method for operation that K1 is disconnected, switch K2 is closed, direct-current grid is switched
System.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvement and deformation can also be made, these change
Enter and deform and also should be regarded as the scope of protection of the utility model.
Claims (6)
1. a kind of DC micro power grid system based on hybrid energy-storing, it is characterised in that including grid-connection converter, photovoltaic array, surpass
Level electric capacity, battery, bidirectional DC-DC converter, several use electric loading and switch；The direct-current grid uses two-stage direct current
Bus structure, including dc bus BUS1 and dc bus BUS2, the dc bus BUS1 is by grid-connection converter with exchanging
Power System Interconnection, the photovoltaic array by single-phase DC-DC converter access dc bus BUS1, the super capacitor directly with directly
Stream bus BUS1 is connected, and the dc bus BUS1 is connected through bidirectional DC-DC converter with battery, and several described electricity consumptions are born
Carry and dc bus BUS2 is accessed by respective converter, the dc bus BUS2 is by switching K1 and dc bus BUS1 phases
Even, the dc bus BUS2 is connected by switching K2 with battery.
2. a kind of DC micro power grid system based on hybrid energy-storing according to claim 1, it is characterised in that described grid-connected
Converter is two-way DC-AC converters.
3. a kind of DC micro power grid system based on hybrid energy-storing according to claim 1, it is characterised in that described single-phase
DC-DC converter uses Boost topological structures.
A kind of 4. DC micro power grid system based on hybrid energy-storing according to claim 1, it is characterised in that the electricity consumption
What load included DC form uses electric loading with electric loading and form of communication.
A kind of 5. DC micro power grid system based on hybrid energy-storing according to claim 4, it is characterised in that the direct current
Form accesses dc bus BUS2 with electric loading by single-phase DC-DC converter.
A kind of 6. DC micro power grid system based on hybrid energy-storing according to claim 4, it is characterised in that the exchange
Form accesses dc bus BUS2 with electric loading by single-phase DC-AC converters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720472402.0U CN206742872U (en) | 2017-04-28 | 2017-04-28 | A kind of DC micro power grid system based on hybrid energy-storing |
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| CN201720472402.0U CN206742872U (en) | 2017-04-28 | 2017-04-28 | A kind of DC micro power grid system based on hybrid energy-storing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111262267A (en) * | 2018-11-30 | 2020-06-09 | 中国科学院大连化学物理研究所 | Extensible solid oxide fuel cell distributed power station |
-
2017
- 2017-04-28 CN CN201720472402.0U patent/CN206742872U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111262267A (en) * | 2018-11-30 | 2020-06-09 | 中国科学院大连化学物理研究所 | Extensible solid oxide fuel cell distributed power station |
| CN111262267B (en) * | 2018-11-30 | 2021-08-13 | 中国科学院大连化学物理研究所 | Extensible solid oxide fuel cell distributed power station |
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