CN110289621A - A kind of alternating current-direct current electric energy router of the access containing distributed generation resource - Google Patents
A kind of alternating current-direct current electric energy router of the access containing distributed generation resource Download PDFInfo
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- CN110289621A CN110289621A CN201910649258.7A CN201910649258A CN110289621A CN 110289621 A CN110289621 A CN 110289621A CN 201910649258 A CN201910649258 A CN 201910649258A CN 110289621 A CN110289621 A CN 110289621A
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- 238000004146 energy storage Methods 0.000 claims abstract description 41
- 230000005611 electricity Effects 0.000 claims description 14
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
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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
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H02J3/385—
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- H02J3/386—
-
- 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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of alternating current-direct current electric energy routers of access containing distributed generation resource, and alternating current-direct current electric energy router includes DC load interface, dc power interface, the first DC/DC inverter, the 2nd DC/DC inverter, two-way DC/AC current transformer, energy storage device and controller；DC load interface is connect with the DC side of the high-voltage end of the first DC/DC inverter, the high-voltage end of the 2nd DC/DC inverter and two-way DC/AC current transformer respectively, the low-pressure end of first DC/DC inverter is connect with dc power interface, the low-pressure end of 2nd DC/DC inverter is connect with energy storage device, the exchange side of two-way DC/AC current transformer is incorporated to ac bus, utility grid is incorporated to ac bus, and ac bus provides electric energy for AC load；The present invention is provided simultaneously with isolated network and grid-connected two kinds of operational modes, can stablize the voltage of alternating current-direct current bus with exchange the frequency of side, avoid the fluctuation of power and voltage, improve alternating current-direct current electric energy router as user and the quality of electric energy is provided.
Description
Technical field
The present invention relates to alternating current-direct current electric energy router technical fields, more particularly to a kind of friendship of access containing distributed generation resource
Direct current energy router.
Background technique
Renewable energy system is unsuitable for independent power supply system of generating power for their own use with fluctuation feature because it is intermittent,
It needs to interconnect with other distributed power grids or public electric wire net.Formation is based on into energy internet transformation process in traditional power grid
The intelligent distributed energy network of electric energy router, and core of the electric energy router as the network, may be implemented distribution
Energy management and transmission control after plant-grid connection low voltage electric network.
Design for family grade electric energy router, has design [1] Xu Mengchao, Dai Nengling, Huang Wentao, Zheng Xiaodong, Li Guo
, Chen Peiyu, Wang Xudong propose base based on electric energy router design [J] electric power system protection and control of community energy net
Plug and pull, the electric energy router scheme of multiple-input and multiple-output in solid-state transformer realize connection family's hair electric system
New energy power output, energy storage device and load simultaneously carry out unified control and scheduling.But the above method fills distributed generation resource, energy storage
It sets and its voltage is all connected on unique DC bus and controlled with load.And most of electrical equipment of practical ordinary user is all
For AC load, the design that DC bus is only arranged is complex for the connection of AC load, needs to be separately configured additional
DC/AC current transformer increases cost and is not suitable for civilian.And the above method for energy storage device in microgrid control method more
It is complicated and may cause the frequent charge and discharge of energy storage device, reduce the service life of energy storage device.Design [2] Liu Yingshu, Ma Chuan
A kind of electric energy router [J] modern electric based on alternating current-direct current mixing microgrid framework, it is proposed that integration suitable for ordinary user
A variety of distributed generation resources and energy-storage units, and route it with the Intelligentized electric energy that power distribution network cooperation powers to the load jointly
Device.But (1) in terms of connecting electrical equipment, DC bus set by the design in this connection is intended merely to play electric energy transmission
" buffering " effect in the process, to inhibit the output of distributed generation resource intermittence to cause to impact to power grid, not to DC bus
Voltage carries out stringent control, and the DC bus and the purposes for not having connection direct-flow electricity utilization apparatus, therefore the electric energy road
The ability of connection DC load is also just lost by device, can only be used to connect alternating current equipment, this increasing household afterwards
In the case where direct-flow electricity utilization apparatus (such as electric automobile charging pile), which there is obvious disadvantage and not
Foot.(2) in terms of connecting distributed generation resource, maximal power tracing control is not carried out to photo-voltaic power supply and wind-powered electricity generation, it is then right
For the distributed new of access, availability and efficiency are all lower, can not will cause effectively using the electric energy of access
Waste on energy.
And integrated control is not all accomplished in the design of above-mentioned electric energy router, fails entirely to be controlled in a dsp chip
On handled, for whole system control not enough it is intensive efficiently, be not suitable for small-scale civilian.
Summary of the invention
The object of the present invention is to provide a kind of alternating current-direct current electric energy routers of access containing distributed generation resource, are provided simultaneously with isolated network
With grid-connected two kinds of operational modes, can stablize the voltage of alternating current-direct current bus with exchange the frequency of side, avoid the big of power and voltage
Amplitude wave is dynamic, improves alternating current-direct current electric energy router as user and provides the quality of electric energy.
To achieve the above object, the present invention provides following schemes:
The present invention provides a kind of alternating current-direct current electric energy router of access containing distributed generation resource, the alternating current-direct current electric energy router
Including DC load interface, dc power interface, the first DC/DC inverter, the 2nd DC/DC inverter, two-way DC/AC unsteady flow
Device, energy storage device and controller；
The DC load interface respectively with the high-voltage end of the first DC/DC inverter, the 2nd DC/DC inverter
High-voltage end and the two-way DC/AC current transformer DC side connection, the low-pressure end of the first DC/DC inverter with it is described
Dc power interface connection, the low-pressure end of the 2nd DC/DC inverter are connect with the energy storage device, the two-way DC/AC
The exchange side of current transformer is incorporated to ac bus, and utility grid is incorporated to ac bus, and the ac bus provides electricity for AC load
Energy；
If the electric energy that the utility grid breaks down or provides runs pre- lower than DC load and the AC load
If when electric energy, the controller control disconnects the connection of the ac bus and the utility grid, the alterating and direct current energy circuit
Isolated network mode is entered by the operation of device, otherwise the alternating current-direct current electric energy router operates to grid-connect mode；
Under isolated network mode: when the electric energy that the alternating current-direct current electric energy router provides is higher than the DC load and the friendship
When the default electric energy of current load, the controller controls the energy storage device charging；When the alternating current-direct current electric energy router provides
Electric energy lower than the DC load and the AC load default electric energy when, the controller controls the energy storage device and puts
Electricity, the electric energy that the alternating current-direct current electric energy router provides include the electric energy that the DC load interface obtains.
Optionally, the alternating current-direct current electric energy router further includes AC power interface, the AC power interface respectively with
The exchange side of the two-way DC/AC current transformer and ac bus connection.
Optionally, the controller analyzes the voltage and current of the ac bus detected, and according to point
Analysis result controls the on-off of triode in the two-way DC/AC current transformer, to maintain the steady of the ac bus voltage and frequency
It is fixed.
Optionally, the dc power interface connects DC power supply；The controller is according to the DC power supply port
Voltage and current runs the DC power control under maximal power tracing mode.
Optionally, the controller controls the first DC/AC inverter and is increased to the voltage of the DC power supply directly
Busbar voltage is flowed, the electric energy that the DC power supply generates is sent to the DC bus side.
Optionally, the controller according to the voltage and current acquired from the low-pressure end of the 2nd DC/DC inverter come
Control the charging and discharging of the energy storage device.
Optionally, the dc power interface connects photovoltaic generating system.
Optionally, the AC power interface connects wind generator system.
Optionally, the energy storage device is battery.
Optionally, the controller is dsp chip.
The summary of the invention provided according to the present invention, the invention discloses following technical effects: the present invention is a kind of containing distribution
There are isolated networks and grid-connected two kinds of operational modes for the alternating current-direct current electric energy router of plant-grid connection, under isolated network mode: working as alterating and direct current
When the electric energy that energy router provides is higher than the default electric energy of DC load and AC load, controller controls energy storage device charging；
When the electric energy that alternating current-direct current electric energy router provides is lower than the default electric energy of DC load and AC load, controller controls energy storage
Device electric discharge, the electric energy that alternating current-direct current electric energy router provides include the electric energy that DC load interface obtains；Pass through energy storage device
Charge and discharge subtract to control the voltage of DC load and AC load to maintain the stable operation of DC load and AC load
The disturbance of few output power rises to user and provides the quality of electric energy.
In addition, the present invention carries out charge and discharge to energy storage device only under the mode of isolated power grid, reduce energy storage device
Access times, extend the service life of energy storage device.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the alternating current-direct current electric energy router structural schematic diagram that the embodiment of the present invention is accessed containing distributed generation resource；
Fig. 2 is the alternating current-direct current electric energy router inside detailed construction signal that the embodiment of the present invention is accessed containing distributed generation resource
Figure；
Fig. 3 is structure of the alternating current-direct current electric energy router that accesses containing distributed generation resource of the embodiment of the present invention under isolated network mode
Schematic diagram；
Fig. 4 is the alternating current-direct current electric energy router control structure schematic diagram that the embodiment of the present invention is accessed containing distributed generation resource.
Specific embodiment
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 description, 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.
The object of the present invention is to provide a kind of alternating current-direct current electric energy routers of access containing distributed generation resource, pass through energy storage device
Charge and discharge subtract to control the voltage of DC load and AC load to maintain the stable operation of DC load and AC load
The disturbance of few output power rises to user and provides the quality of electric energy.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
The present invention provides a kind of alternating current-direct current electric energy router of access containing distributed generation resource, and Fig. 1 contains for the embodiment of the present invention
The alternating current-direct current electric energy router structural schematic diagram of distributed generation resource access, Fig. 2 are that the embodiment of the present invention is accessed containing distributed generation resource
Alternating current-direct current electric energy router inside detailed construction schematic diagram, as shown in Figs. 1-2, alternating current-direct current electric energy router includes the first DC/
DC inverter 1, the 2nd DC/DC inverter 2, two-way DC/AC current transformer 3, energy storage device 4, DC load interface 5, DC power supply
Interface 6 and controller.
The high-voltage end with the high-voltage end of the first DC/DC inverter 1, the 2nd DC/DC inverter 2 respectively of DC load interface 6
And the DC side connection of two-way DC/AC current transformer 3, the low-pressure end of the first DC/DC inverter 1 are connect with dc power interface 6,
The low-pressure end of 2nd DC/DC inverter 2 is connect with energy storage device 4, and the exchange side of two-way DC/AC current transformer 3 is incorporated to ac bus
10, utility grid 8 is incorporated to ac bus 10, and ac bus 10 provides electric energy for AC load；Ac bus 10 is alternating current 220V
Bus is used in the case where most of civilian loads are AC load convenient for ordinary household resident.
If the electric energy that utility grid 8 breaks down or provides is lower than the default electric energy that DC load and AC load are run
When, controller control disconnects the connection of ac bus 10 and utility grid 8, and the operation of alternating current-direct current electric energy router enters isolated network mould
Formula, otherwise alternating current-direct current electric energy router operates to grid-connect mode.
Enter the judgement of isolated network mode for the present invention, the structure design of alternating current-direct current electric energy router of the present invention has orphan
Island detection function specially uses active detecting mode, by controlling two-way DC/AC current transformer 3, by two-way DC/AC current transformer 3
It samples obtained output power, frequency or the phase of exchange side and gives controller, when normal work, due to putting down for utility grid 8
Weighing apparatus effect, can't detect the disturbance of above-mentioned output power, frequency or phase, once utility grid 8 breaks down, two-way DC/AC
The disturbance that current transformer 3 exports is by accelerated accumulation and exceeds allowed band, calculates to issue orphan by the program inside controller
Island signal, wherein U in Fig. 2dcIndicate 9 side voltage of DC bus, PSDCIndicate output power at dc power interface 6, PLDCIt indicates
DC load interface power, PDC_ACIt indicates to exchange side output power to DC/AC current transformer 3.
Fig. 3 is structure of the alternating current-direct current electric energy router that accesses containing distributed generation resource of the embodiment of the present invention under isolated network mode
Schematic diagram, Fig. 4 are the alternating current-direct current electric energy router control structure schematic diagram that the embodiment of the present invention is accessed containing distributed generation resource, are such as schemed
Shown in 3-4, under isolated network mode: when the electric energy that alternating current-direct current electric energy router provides is higher than the default of DC load and AC load
When electric energy, controller controls energy storage device 4 and charges；When alternating current-direct current electric energy router provide electric energy lower than DC load with exchange
When the default electric energy of load, controller controls energy storage device 4 and discharges, and the electric energy that alternating current-direct current electric energy router provides includes that direct current is negative
Carry the electric energy obtained at interface 5.
Alternating current-direct current electric energy router further includes AC power interface 7, AC power interface 7 respectively with two-way DC/AC unsteady flow
The exchange side of device 3 and ac bus 10 connect.
Controller analyzes the voltage and current of the ac bus 10 detected, and controls based on the analysis results two-way
The on-off of triode in DC/AC current transformer 3, to maintain the stabilization of ac bus 10 voltage and frequency.Two-way DC/AC current transformer 3
DC side connects DC bus 9, and exchange side connects 220V ac bus 10, power PgIt can two-way flow.It is double under isolated network mode
V/f control strategy is used to DC/AC current transformer 3, provides voltage and frequency support, two-way DC/AC current transformer 3 to ac bus 10
DC side power by 4 charge-discharge electric power common equilibrium of Dc source power, DC load power and energy storage device；In grid-connected mould
Under formula, two-way DC/AC current transformer 3 provides the support of power and voltage for DC load.
Dc power interface 5 connects DC power supply；Controller is according to the voltage and current of DC power supply port by direct current
Source control is run under maximal power tracing mode.
Controller controls the voltage that the voltage of DC power supply is increased to DC bus 9 by the first DC/AC inverter 1, will
The electric energy that DC power supply generates is sent to 9 side of DC bus.
Controller controls energy storage device 4 according to the voltage and current acquired from the low-pressure end of the 2nd DC/DC inverter 2
It is charged and discharged.The high-pressure side of 2nd DC/DC inverter 2 connects DC bus 9, and low-pressure side connects energy storage device 4, for realizing
Energy storage device 4 carries out Bidirectional charging-discharging, and under isolated power grid mode, energy storage device 4 is straight for balancing two-way DC/AC current transformer 3
The power and voltage for flowing side, under the mode of being incorporated into the power networks, energy storage device 4 is used as backup power source；Energy storage device 4 is only in isolated power grid
It is used under state, extends the service life of energy storage device 4.
Dc power interface 5 connects photovoltaic generating system.
AC power interface 6 connects wind generator system.
Energy storage device 4 is battery.
Energy storage device 4 provides the effect of power support and backup power supply, and energy storage device 4 is connected by the 2nd DC/DC inverter 2
It is connected on DC bus 9, DC load is connected on DC bus 9 by DC load interface 5, while AC power interface 7
By the exchange distributed generation resource access such as wind-force.DC bus 9 passes through the two-way DC/AC current transformer inside alternating current-direct current electric energy router
3 are connected on ac bus 10 by AC load interface 7.
Controller is dsp chip 11, and the present invention is by the first DC/DC inverter 1, the 2nd DC/DC inverter 2 and two-way DC/
The control of AC current transformer 3 is all integrated on dsp chip 11, has accomplished the integrated of equipment, makes to control simpler efficient.
2nd DC/DC inverter 2 of the first DC/DC inverter 1 and connection DC load that connect DC power supply passes through one
A dsp chip 11 is controlled, and the voltage and current value that sampling obtains is sent to dsp chip 11 by signal, inside DSP
The operation of program, then send the pulsewidth modulation PMW wave generated by DSP to the first DC/DC inverter 1 and the 2nd DC/DC change of current
Insulated gate bipolar transistor IGBT in device 2 is to reach the purpose of control, wherein PMW wave is connected to by signal connecting line
The triggering end of IGBT, PWM wave are exactly one group of square wave with high low potential, and IGBT is connected when high potential, and IGBT is closed when low potential
It is disconnected.DC power supply uses maximum power tracing control strategy, and DC load passes through its port voltage of Double closed-loop of voltage and current
Stabilization.Two-way DC/AC current transformer 3 is controlled also by dsp chip 11, is controlled by the PWM wave of control DSP generation
The on-off of IGBT.
Alternating current-direct current electric energy router disclosed by the invention provides interface for exchange distributed generation resource, by controlling plan accordingly
Slightly controlled.For example, corresponding control strategy are as follows: when AC power interface accesses wind generator system, control AC power source
The power of being shortlisted for of interface is unit power factor, size PSACAnd it is converted with factor of natural environment and changes (such as wind-power electricity generation
When using maximum power tracing, PSACSize with wind speed change and change).
Based on the above-mentioned course of work, alternating current-direct current electric energy router of the present invention receives exchange bulk power grid, light under grid-connected operating condition
The electric energy that the distributed energy of volt and wind-powered electricity generation inputs, and AC load and DC load are distributed the power to, to maintain exchange negative
Carry the voltage stabilization with DC load.
Alternating current-direct current electric energy router disclosed by the invention is designed relative to existing electric energy router, advantage be cost compared with
Low, control method is flexible, is suitable for low power ordinary user and uses.
Alternating current-direct current electric energy router disclosed by the invention can provide for the various alternating current-direct current electricity consumptions of family, generating equipment inserts
Interface is used, provides interface, while reserved AC power interface by the first DC DC inverter for photo-voltaic power supply and DC load
Interface is provided for accessing the wind-force distributed energy, and for connection alternating current 220V alternating current, therefore various alternating current-direct current equipment all may be used
With plug and play.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of alternating current-direct current electric energy router of the access containing distributed generation resource, which is characterized in that the alternating current-direct current electric energy router
Including DC load interface, dc power interface, the first DC/DC inverter, the 2nd DC/DC inverter, two-way DC/AC unsteady flow
Device, energy storage device and controller；
The DC load interface height with the high-voltage end of the first DC/DC inverter, the 2nd DC/DC inverter respectively
The connection of the DC side of pressure side and the two-way DC/AC current transformer, the low-pressure end and the direct current of the first DC/DC inverter
Power interface connection, the low-pressure end of the 2nd DC/DC inverter are connect with the energy storage device, the two-way DC/AC unsteady flow
The exchange side of device is incorporated to ac bus, and utility grid is incorporated to ac bus, and the ac bus provides electric energy for AC load；
If the electric energy that the utility grid breaks down or provides is lower than the default electricity that DC load and the AC load are run
When energy, the controller control disconnects the connection of the ac bus and the utility grid, the alternating current-direct current electric energy router
Operation enter isolated network mode, otherwise the alternating current-direct current electric energy router operates to grid-connect mode；
Under isolated network mode: being born when the electric energy that the alternating current-direct current electric energy router provides is higher than the DC load with described exchange
When the default electric energy carried, the controller controls the energy storage device charging；When the electricity that the alternating current-direct current electric energy router provides
When can be lower than the default electric energy of the DC load and the AC load, the controller controls the energy storage device electric discharge,
The electric energy that the alternating current-direct current electric energy router provides includes the electric energy that the DC load interface obtains.
2. the alternating current-direct current electric energy router of the access according to claim 1 containing distributed generation resource, which is characterized in that the friendship
Direct current energy router further includes AC power interface, the AC power interface respectively with the two-way DC/AC current transformer
Exchange side and ac bus connection.
3. the alternating current-direct current electric energy router of the access according to claim 1 containing distributed generation resource, which is characterized in that the control
Device processed analyzes the voltage and current of the ac bus detected, and controls the two-way DC/ based on the analysis results
The on-off of triode in AC current transformer, to maintain the stabilization of the ac bus voltage and frequency.
4. the alternating current-direct current electric energy router of the access according to claim 3 containing distributed generation resource, which is characterized in that described straight
Galvanic electricity source interface connects DC power supply；The controller is according to the voltage and current of the DC power supply port by the direct current
Source control is run under maximal power tracing mode.
5. the alternating current-direct current electric energy router of the access according to claim 4 containing distributed generation resource, which is characterized in that the control
Device processed controls the first DC/AC inverter and the voltage of the DC power supply is increased to DC bus-bar voltage, will be described straight
The electric energy that galvanic electricity source generates is sent to the DC bus side.
6. the alternating current-direct current electric energy router of the access according to claim 3 containing distributed generation resource, which is characterized in that the control
Device processed controls the charging of the energy storage device according to the voltage and current acquired from the low-pressure end of the 2nd DC/DC inverter
And electric discharge.
7. the alternating current-direct current electric energy router of the access according to claim 1 containing distributed generation resource, which is characterized in that described straight
Galvanic electricity source interface connects photovoltaic generating system.
8. the alternating current-direct current electric energy router of the access according to claim 2 containing distributed generation resource, which is characterized in that the friendship
Galvanic electricity source interface connects wind generator system.
9. the alternating current-direct current electric energy router of the access according to claim 1 containing distributed generation resource, which is characterized in that the storage
Energy device is battery.
10. the alternating current-direct current electric energy router of the access according to claim 1 containing distributed generation resource, which is characterized in that described
Controller is dsp chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910649258.7A CN110289621A (en) | 2019-07-18 | 2019-07-18 | A kind of alternating current-direct current electric energy router of the access containing distributed generation resource |
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| CN201910649258.7A CN110289621A (en) | 2019-07-18 | 2019-07-18 | A kind of alternating current-direct current electric energy router of the access containing distributed generation resource |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970942A (en) * | 2019-12-18 | 2020-04-07 | 北京新城绿源科技发展有限公司 | Direct current energy router |
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