CN109698495A - A kind of DC micro power grid system based on super capacitor - Google Patents
A kind of DC micro power grid system based on super capacitor Download PDFInfo
- Publication number
- CN109698495A CN109698495A CN201811522990.XA CN201811522990A CN109698495A CN 109698495 A CN109698495 A CN 109698495A CN 201811522990 A CN201811522990 A CN 201811522990A CN 109698495 A CN109698495 A CN 109698495A
- Authority
- CN
- China
- Prior art keywords
- power
- bus
- super capacitor
- energy
- micro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
-
- 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
- H02J1/10—Parallel operation of dc sources
-
- 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
- H02J1/14—Balancing the load in a network
-
- 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
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of DC micro power grid systems based on super capacitor, including DC bus, super capacitor, energy-storage battery group, auxiliary generating unit, distributed new generator unit, local load and microgrid control centre；The super capacitor, energy-storage battery group, auxiliary generating unit, distributed new generator unit, local load and microgrid control centre connect with the DC bus respectively, and the DC bus is connect with power distribution network；The microgrid control centre controls the flow of power between the super capacitor, energy-storage battery group and auxiliary generating unit and the DC bus and the flow of power between the DC bus and the power distribution network respectively.The present invention, as unique and lasting voltage source, is absorbed the high frequency power fluctuation in direct-current grid, can effectively inhibit voltage fluctuation and the surge current of grid-connect mode and off-network pattern switching moment by super capacitor.
Description
Technical field
The present embodiments relate to micro-capacitance sensor technical fields, micro- more particularly, to a kind of direct current based on super capacitor
Network system.
Background technique
Renewable energy it is a large amount of using can not only the current energy crisis of link, while can also greatly reduce pollutant
Discharge, can obtain preferable energy-saving and emission-reduction benefit.The disadvantages of renewable energy power generation unit is unstable there is generated energy, therefore
Energy-storage system has become the distributed generation system i.e. weight of micro-grid system with solar energy, wind energy etc. for main energy sources
Link is wanted, there is important research significance.
Currently, China clearly proposes to build new energy micro-capacitance sensor demonstration project energetically, micro-grid system has entered in China
Rapid development stage.There are mainly two types of operational modes at present for China's micro-grid system: grid-connect mode and off-network mode, wherein from
Net mode is also referred to as island mode.
In Traditional control strategy, under grid-connect mode, the busbar voltage of micro-capacitance sensor is always subjected to the direct master of network voltage
It leads or by the indirect leading of power inverter；There are uncertain Power Exchanges between micro-capacitance sensor and power distribution network, so that electric power
The power scheduling of system is complicated, and the stability of entire power distribution network electric system is made to generate risk.In particular with new energy at this stage
Source is in the increase trend of micro-capacitance sensor proportion, and power distribution network will have to micro-capacitance sensor quantity and wherein new energy specific gravity limits
System, to prevent power grid unstable.The busbar voltage of micro-capacitance sensor is controlled in grid-connect mode by network voltage.
When switching to off-network mode, voltage input can be switched to energy-storage system, and energy-storage system underaction will be to micro- electricity
Net generates fluctuation, influences the stability of micro-capacitance sensor.At this point, the decision source of the busbar voltage of micro-capacitance sensor translates into inside micro-capacitance sensor
Energy-storage system.Under off-network mode it is again grid-connected before, there are two voltage sources of micro-capacitance sensor and power distribution network, grid-connected moment needs
It realizes seamless switching, and to there is advanced technology to inhibit surge current caused by voltage difference.
Meanwhile the energy management method difference of grid-connect mode and off-network mode is very big, it is quick in off-network and grid-connected moment
Switch also critically important.Therefore, current direct-current grid is cut in grid-connect mode or off-network mode or grid-connect mode with off-network mode
It is easy to influence the stability of micro-capacitance sensor there are power swing when changing.
Summary of the invention
To solve the above-mentioned problems, the embodiment of the invention provides a kind of DC micro power grid system based on super capacitor,
The system includes: DC bus, super capacitor, energy-storage battery group, auxiliary generating unit, distributed new generator unit, sheet
Ground load and microgrid control centre；Super capacitor, energy-storage battery group, auxiliary generating unit, distributed new generator unit, sheet
Ground load and microgrid control centre connect with DC bus respectively, and DC bus is connect with power distribution network；Microgrid control centre difference
Control flow of power between super capacitor, energy-storage battery group and auxiliary generating unit and DC bus and DC bus with
Flow of power between power distribution network.
Preferably, distributed new generator unit includes photovoltaic array and blower subelement, and photovoltaic array and blower are sub
Unit is connect with DC bus respectively.
Preferably, which further includes that the first two-way dc/dc converter, the second two-way dc/dc converter, third are two-way
Dc/dc converter, dc/ac inverter, unidirectional dc/dc converter, rectifier, two-way dc/ac bus power converter and public
Coupling point；Super capacitor is connect by the first two-way dc/dc converter with DC bus, and energy-storage battery group is two-way by second
Dc/dc converter is connect with DC bus, and auxiliary generating unit is connect by the two-way dc/dc converter of third with DC bus,
Local load is connect by dc/ac inverter with DC bus, and photovoltaic array is connected by unidirectional dc/dc converter and DC bus
It connects, blower is connect by rectifier with DC bus, and DC bus passes sequentially through two-way dc/ac bus power converter and public
Coupling point is connect with power distribution network.
Preferably, the fluctuating power of direct-current grid includes high frequency power and low frequency power；If high frequency power is output shape
State, then super capacitor opens generating state；If high frequency power is input state, super capacitor opens absorbing state；If low frequency
Power is the peak power output that output state and low frequency power are greater than energy-storage battery group, then auxiliary generating unit opens power generation shape
State；If low frequency power is the peak power output that output state and low frequency power are less than energy-storage battery group, energy-storage battery group is opened
Breakdown inspires electricity condition；If low frequency power is the maximal input that input state and low frequency power are greater than energy-storage battery group,
Auxiliary generating unit opens absorbing state；If low frequency power is input state and low frequency power is less than the maximum defeated of energy-storage battery group
Enter power, then energy-storage battery group opens absorbing state.
Preferably, the fluctuating power of direct-current grid is distributed new generator unit, local load, energy-storage battery
Group, auxiliary generating unit respectively the sum of with the interaction power of DC bus, and direct-current grid pre-set average power difference；Institute
Stating pre-set average power is average value of the fluctuating power in 1 year.
Preferably, the capacitance of super capacitor are as follows:
Wherein, C is the capacitance of super capacitor, VnomFor the voltage rating of direct-current grid, VminFor direct-current grid
End operating voltage, Vnom-cFor the voltage rating of super capacitor, Vmin-cFor the minimum permission work of the first two-way dc/dc converter
Make voltage, t is the time that direct-current grid continues working, and I is the load current of DC bus.
Preferably, auxiliary generating unit includes water storage subelement, hydrogen manufacturing subelement and fuel cell subelement.
Preferably, local load includes ohmic load and power termination.
The embodiment of the invention provides a kind of DC micro power grid system based on super capacitor, super capacitor is in the system
Unique and lasting voltage source can effectively inhibit the voltage fluctuation of grid-connect mode and off-network pattern switching moment, absorb simultaneously
High frequency power fluctuation in direct-current grid；Energy-storage battery group, auxiliary generating unit absorb low frequency power wave due to reacting slower
It is dynamic, it is formed with super capacitor complementary, realizes energy-storage system high power density and high-energy density and the advantage deposited；Before switching
Voltage fluctuation when all using super capacitor as voltage source afterwards, therefore effectively inhibiting grid-connect mode or off-network pattern switching and
Surge current.Meanwhile the system uses the inflow and outflow mode of preset value power, when eliminating power distribution network and being interacted with microgrid energy
Uncertainty, can effectively realize increase new energy accounting, increase the quantity of the access of micro-capacitance sensor.
Detailed description of the invention
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 technical description to be briefly described.It should be evident that the accompanying drawings in the following description is 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 figures.
Fig. 1 is a kind of structural schematic diagram of DC micro power grid system based on super capacitor of the embodiment of the present invention；
Fig. 2 is a kind of control block diagram of DC micro power grid system based on super capacitor of the embodiment of the present invention；
Wherein:
1. 2. super capacitor of DC bus
3. 4. auxiliary generating unit of energy-storage battery group
5. the two-way dc/ac bus power converter of distributed new generator unit 6.
7. 8. microgrid control centres of local load
9. the two-way dc/dc converter of point of common coupling 10. first
11. the second two-way two-way dc/dc converter of 12. third of dc/dc converter
13. unidirectional 14. rectifier of dc/dc converter
16. photovoltaic array of 15.dc/ac inverter
17. 18 power distribution network of blower.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
In Traditional control strategy, under grid-connect mode, the busbar voltage of micro-capacitance sensor is always subjected to the direct master of network voltage
It leads or by the indirect leading of power inverter；There are uncertain Power Exchanges between micro-capacitance sensor and power distribution network, so that electric power
The power scheduling of system is complicated, and the stability of entire power distribution network electric system is made to generate risk.In particular with new energy at this stage
Source is in the increase trend of micro-capacitance sensor proportion, and power distribution network will have to micro-capacitance sensor quantity and wherein new energy specific gravity limits
System, to prevent power grid unstable.The busbar voltage of micro-capacitance sensor is controlled in grid-connect mode by network voltage.
When switching to off-network mode, voltage input can be switched to energy-storage system, and energy-storage system underaction will be to micro- electricity
Net generates fluctuation, influences the stability of micro-capacitance sensor.At this point, the decision source of the busbar voltage of micro-capacitance sensor translates into inside micro-capacitance sensor
Energy-storage system.Under off-network mode it is again grid-connected before, there are two voltage sources of micro-capacitance sensor and power distribution network, grid-connected moment needs
It realizes seamless switching, and to there is advanced technology to inhibit surge current caused by voltage difference.
Meanwhile the energy management method difference of grid-connect mode and off-network mode is very big, it is quick in off-network and grid-connected moment
Switch also critically important.Therefore, current direct-current grid is cut in grid-connect mode or off-network mode or grid-connect mode with off-network mode
It is easy to influence the stability of micro-capacitance sensor there are power swing when changing.
Fig. 1 is a kind of structural schematic diagram of DC micro power grid system based on super capacitor of the embodiment of the present invention, such as Fig. 1
Shown, the embodiment of the invention provides a kind of DC micro power grid system based on super capacitor 2, which includes: DC bus
1, super capacitor 2, energy-storage battery group 3, auxiliary generating unit 4, distributed new generator unit 5, local load 7 and microgrid control
Center 8 processed；Super capacitor 2, energy-storage battery group 3, auxiliary generating unit 4, distributed new generator unit 5,7 and of local load
Microgrid control centre 8 connect with DC bus 1 respectively, and DC bus 1 is connect with power distribution network 18；Microgrid control centre 8 is controlled respectively
Flow of power and DC bus 1 between super capacitor 2 processed, energy-storage battery group 3 and auxiliary generating unit 4 and DC bus 1
With the flow of power between power distribution network 18.
Specifically, super capacitor 2, energy-storage battery group 3, auxiliary generating unit 4,5 conduct of distributed new generator unit
The energy of DC micro power grid system inputs or output device is connect with DC bus 1 respectively, and local load 7 is used as direct-current grid
The energy outputing device of system, DC bus 1 connect the microgrid control to carry out electric energy with power distribution network 18 and interact with power distribution network 18
Center 8 then respectively control super capacitor 2, energy-storage battery group 3, auxiliary generating unit 4, distributed new generator unit 5 with
The flow of power between flow of power and DC bus 1 and power distribution network 18 between DC bus 1, so that control is entire straight
Flow the flow of power of micro-grid system.
Wherein, energy-storage battery group 3 and auxiliary generating unit 4 due to energy density it is larger, meet micro-grid system to energy
The requirement of density.But it is limited by the limitation of electrochemical reaction speed, the power of energy-storage battery group 3 and auxiliary generating unit 4 is close
Spend it is smaller, when bearing power mutation when, quickly cannot absorb or discharge target power, it is more difficult to which the dynamic for meeting system is wanted
It asks.It, can be in a short time happens is that physical change, has the characteristics that power density is big inside when 2 charge and discharge of super capacitor
Relatively high power is provided, provides buffering for other equipment, but energy density is lower, therefore energy-storage battery group 3 and auxiliary power generation list
Member 4 has stronger complementarity with super capacitor 2 in performance.
The embodiment of the invention provides a kind of DC micro power grid systems based on super capacitor 2, and super capacitor 2 is as unique
And lasting voltage source, it can effectively inhibit micro-capacitance sensor voltage fluctuation caused by the switching moment of grid-connect mode and off-network mode
And surge current, while the fluctuation of the high frequency power in micro-capacitance sensor can be absorbed；Energy-storage battery group 3 and auxiliary generating unit 4 are due to anti-
Should be relatively slow, for absorbing the low-frequency power fluctuations in micro-capacitance sensor, energy-storage battery group 3 and auxiliary generating unit 4 and 2 shape of super capacitor
At complementation, thus the advantage for making micro-capacitance sensor be able to achieve high power density and high-energy density in terms of energy storage and depositing.
It should be noted that distributed energy mainly includes using liquid or gas as the internal combustion engine of fuel, miniature combustion at present
Gas-turbine, solar power generation, wind-power electricity generation or biomass power generation etc., the distributed new in the embodiment of the present invention generate electricity single
Member 5 includes 17 subelement of photovoltaic array 16 and blower, and photovoltaic array 16 and 17 subelement of blower are connect with DC bus 1 respectively,
For inputting distributed energy to micro-capacitance sensor.
Further, the distributed energy type that distributed new generator unit 5 includes can also be selected voluntarily as needed
It selects.
Based on the above embodiment, which further includes the first two-way dc/dc converter 10, the second two-way dc/dc converter
11, the two-way dc/dc converter 12 of third, dc/ac inverter 15, unidirectional dc/dc converter 13, rectifier 14, two-way dc/ac are female
Linear heat generation rate converter 6 and point of common coupling 9；Super capacitor 2 is connect by the first two-way dc/dc converter 10 with DC bus 1,
Energy-storage battery group 3 is connect by the second two-way dc/dc converter 11 with DC bus 1, and auxiliary generating unit 4 is two-way by third
Dc/dc converter 12 is connect with DC bus 1, and local load 7 is connect by dc/ac inverter 15 with DC bus 1, photovoltaic battle array
Column 16 are connect by unidirectional dc/dc converter 13 with DC bus 1, and blower 17 is connect by rectifier 14 with DC bus 1, directly
Stream bus 1 passes sequentially through two-way dc/ac bus power converter 6 and point of common coupling 9 is connect with power distribution network 18.
Specifically, since the energy that super capacitor 2, energy-storage battery group 3 and auxiliary generating unit 4 are micro-grid system inputs
Or output device, therefore super capacitor 2, energy-storage battery group 3 and auxiliary generating unit 4 pass through a two-way dc/dc transformation respectively
Device is connect with DC bus 1, and electric energy is inputted or absorbed to DC bus 1.And distributed new generator unit 5 is micro-capacitance sensor system
The energy input unit of system, therefore unidirectionally to 1 input energy of DC bus, wherein photovoltaic array 16 is converted by unidirectional dc/dc
Device 13 is connect with DC bus 1, and blower 17 is connect by rectifier 14 with DC bus 1, and photovoltaic array 16 and blower 17 are distinguished
To 1 inputing power of DC bus.Since electrical appliance is generally AC electric appliance, local load 7 passes through dc/ac inverter 15
It is connect with DC bus 1, it is local negative that the direct current energy that DC bus 1 exports is converted AC energy by dc/ac inverter 15
Carry 7 power supplies.Power distribution network 18 is alternating current, and DC bus 1 passes sequentially through two-way dc/ac bus power converter 6 and public coupling
Point 9 is connect with power distribution network 18.
Based on the above embodiment, Fig. 2 is a kind of DC micro power grid system based on super capacitor of the embodiment of the present invention
Block diagram is controlled, as shown in Fig. 2, the fluctuating power of direct-current grid is distributed new generator unit 5, local load 7, storage
It can the default average function of battery pack 3, auxiliary generating unit 4 respectively the sum of with the interaction power of DC bus 1, with direct-current grid
The difference of rate；Pre-set average power is average value of the fluctuating power in 1 year.
Specifically, the power of distributed new generator unit 5 is calculated as Pgen, local load 7, energy-storage battery group 3, auxiliary
Generator unit 4 is calculated as P with the sum of the interaction power of DC bus 1 respectivelyload, when not calculating super capacitor 2 and direct-current grid
Energetic interaction when, direct-current grid has the extra or energy P that lacksx, therefore Px=Pgen-Pload。
It should be noted that due to the energetic interaction direction of energy-storage battery group 3 and auxiliary generating unit 4 and DC bus 1
It is uncertain, therefore local load 7, energy-storage battery group 3, auxiliary generating unit 4 are respectively the sum of with the interaction power of DC bus 1
PloadFor algebraical sum.
Further, direct-current grid has energy P that is extra or lackingxDue to the fluctuation of distributed energy, meeting
It fluctuates in a short time, therefore take that direct-current grid has extra or the energy P lackedxAverage value as direct current
The pre-set average power P of micro-capacitance sensoravg, direct-current grid is had into energy P that is extra or lackingxWith pre-set average power Pavg
Fluctuating power P of the difference as direct-current gridw, therefore Pw=Px-Pavg.Wherein, the pre-set average power P of direct-current gridavg
Due to the energy P for being have extra of direct-current grid or lackingxAverage value, therefore the default average function of direct-current grid
Rate PavgIt is not a fixed value, but is slowly changed within the time using year as length unit, by tracks direct-current grid
The changed power curve in former years makes direct-current grid realize the function with power distribution network 18 using two-way dc/ac bus power converter 6
Rate interaction.
Based on the above embodiment, the fluctuating power P of direct-current gridwIncluding high frequency power PwhWith low frequency power Pwl；If high
Frequency power PwhFor output state, then super capacitor 2 opens generating state；If high frequency power PwhFor input state, then super capacitor
2 open absorbing state；If low frequency power PwlFor output state and low frequency power is greater than the peak power output of energy-storage battery group 3,
Then auxiliary generating unit 4 opens generating state；If low frequency power PwlFor output state and low frequency power is less than energy-storage battery group 3
Peak power output, then energy-storage battery group 3 opens generating state；If low frequency power PwlFor input state and low frequency power
PwlGreater than the maximal input of energy-storage battery group 3, then auxiliary generating unit 4 opens absorbing state；If low frequency power PwlIt is defeated
Enter state and low frequency power PwlLess than the maximal input of energy-storage battery group 3, then energy-storage battery group 3, which is opened, absorbs shape
State.
Based on the above embodiment, the capacitance of super capacitor 2 keeps steady under high frequency power fluctuation according to direct-current grid
Energy that energy needed for fixed and super capacitor 2 export is equal to be determined.
Specifically, energy P needed for direct-current grid keeps voltage stabilization under high frequency power fluctuationkeepAre as follows:
Wherein, PkeepFor energy needed for holding voltage stabilization, the V under high frequency power fluctuation of direct-current gridnomIt is straight
Flow the voltage rating of micro-capacitance sensor, VminFor the cut-off operating voltage of direct-current grid, t is the time that direct-current grid continues working,
I is the load current of DC bus 1.
The energy P that super capacitor 2 exportslossAre as follows:
Wherein, PlossFor the energy that super capacitor 2 exports, Vnom-cFor the voltage rating of super capacitor 2, Vmin-cIt is first pair
To the minimum permission operating voltage of dc/dc converter 10, C is the capacitance of super capacitor 2.
Energy P needed for keeping voltage stabilization under high frequency power fluctuation according to direct-current gridkeepIt is defeated with super capacitor 2
Energy P outlossIt is equal, i.e. Pkeep=PlossThe capacitance C of super capacitor 2 can be acquired are as follows:
Wherein, C is the capacitance of super capacitor 2, VnomFor the voltage rating of direct-current grid, VminFor direct-current grid
End operating voltage, Vnom-cFor the voltage rating of super capacitor 2, Vmin-cFor the minimum permission of the first two-way dc/dc converter 10
Operating voltage, t are the time that direct-current grid continues working, and I is the load current of DC bus 1.
Further, auxiliary generating unit 4 includes water storage subelement, hydrogen manufacturing subelement and fuel cell subelement, can root
Corresponding auxiliary power generation subelement is chosen according to actual conditions.
Further, local load 7 includes ohmic load and power termination.
The embodiment of the invention provides a kind of DC micro power grid system based on super capacitor, super capacitor is in the system
Unique and lasting voltage source can effectively inhibit the voltage fluctuation for switching moment, while absorb high frequency power fluctuation；Energy storage electricity
Pond group and auxiliary generating unit absorb low-frequency power fluctuations due to reacting slower, are formed with super capacitor complementary, and super capacitor exists
Relatively high power is provided or absorbed in short time, provides buffering for other equipment, and energy-storage battery group and auxiliary generating unit then can
More power is absorbed or discharged in a long time, energy-storage system high power density and high-energy density are achieved in and is deposited excellent
Gesture；Due to all using super capacitor as voltage source before and after grid-connect mode or off-network pattern switching, effectively inhibit grid-connected
Voltage fluctuation and surge current when mode or off-network pattern switching.Meanwhile the system uses the inflow and outflow of preset value power
Mode eliminates uncertainty when power distribution network is interacted with microgrid energy, can effectively realize and increase new energy accounting, increases micro-
The quantity of the access of power grid.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. a kind of DC micro power grid system based on super capacitor characterized by comprising DC bus, super capacitor, energy storage
Battery pack, auxiliary generating unit, distributed new generator unit, local load and microgrid control centre；The super capacitor,
Energy-storage battery group, auxiliary generating unit, distributed new generator unit, local load and microgrid control centre respectively with it is described
DC bus connection, the DC bus are connect with power distribution network；The microgrid control centre controls the super capacitor, storage respectively
Flow of power and the DC bus and the distribution between energy battery pack and auxiliary generating unit and the DC bus
Flow of power between net.
2. a kind of DC micro power grid system based on super capacitor according to claim 1, which is characterized in that the distribution
Formula generation of electricity by new energy unit includes photovoltaic array and blower subelement, the photovoltaic array and the blower subelement respectively with institute
State DC bus connection.
3. a kind of DC micro power grid system based on super capacitor according to claim 2, which is characterized in that further include
One two-way dc/dc converter, the second two-way dc/dc converter, the two-way dc/dc converter of third, dc/ac inverter, unidirectional dc/
Dc converter, rectifier, two-way dc/ac bus power converter and point of common coupling；
The super capacitor is connect by the described first two-way dc/dc converter with the DC bus, the energy-storage battery group
It is connect by the described second two-way dc/dc converter with the DC bus, the auxiliary generating unit is double by the third
It is connect to dc/dc converter with the DC bus, the local load passes through the dc/ac inverter and the DC bus
Connection, the photovoltaic array are connect by the unidirectional dc/dc converter with the DC bus, and the blower passes through described whole
Stream device is connect with the DC bus, and the DC bus passes sequentially through two-way dc/ac bus power converter and public coupling
Point is connect with the power distribution network.
4. a kind of DC micro power grid system based on super capacitor according to claim 1, which is characterized in that the direct current
The fluctuating power of micro-capacitance sensor includes high frequency power and low frequency power；
If the high frequency power is output state, the super capacitor opens generating state；If the high frequency power is input
State, then the super capacitor opens absorbing state；
If the low frequency power is the peak power output that output state and the low frequency power are greater than the energy-storage battery group,
The auxiliary generating unit opens generating state；If the low frequency power is output state and the low frequency power is less than the storage
The peak power output of energy battery pack, then the energy-storage battery group opens generating state；
If the low frequency power is the maximal input that input state and the low frequency power are greater than the energy-storage battery group,
The auxiliary generating unit opens absorbing state；If the low frequency power is input state and the low frequency power is less than the storage
The maximal input of energy battery pack, then the energy-storage battery group opens absorbing state.
5. a kind of DC micro power grid system based on super capacitor according to claim 4, which is characterized in that the direct current
The fluctuating power of micro-capacitance sensor is the distributed new generator unit, the local load, the energy-storage battery group, described auxiliary
The sum of help generator unit respectively with the interaction power of the DC bus, and direct-current grid pre-set average power difference；Institute
Stating pre-set average power is average value of the fluctuating power in 1 year.
6. a kind of DC micro power grid system based on super capacitor according to claim 3, which is characterized in that described super
The capacitance of capacitor are as follows:
Wherein, C is the capacitance of super capacitor, VnomFor the voltage rating of direct-current grid, VminFor the cut-off of direct-current grid
Operating voltage, Vnom-cFor the voltage rating of super capacitor, Vmin-cMinimum for the first two-way dc/dc converter allows work electric
Pressure, t are the time that direct-current grid continues working, and I is the load current of DC bus.
7. a kind of DC micro power grid system based on super capacitor according to claim 1, which is characterized in that the auxiliary
Generator unit includes water storage subelement, hydrogen manufacturing subelement and fuel cell subelement.
8. a kind of DC micro power grid system based on super capacitor according to claim 4, which is characterized in that the local
Load includes ohmic load and power termination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811522990.XA CN109698495B (en) | 2018-12-13 | 2018-12-13 | Super capacitor-based direct-current micro-grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811522990.XA CN109698495B (en) | 2018-12-13 | 2018-12-13 | Super capacitor-based direct-current micro-grid system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109698495A true CN109698495A (en) | 2019-04-30 |
| CN109698495B CN109698495B (en) | 2022-05-10 |
Family
ID=66231610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811522990.XA Active CN109698495B (en) | 2018-12-13 | 2018-12-13 | Super capacitor-based direct-current micro-grid system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109698495B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436500A (en) * | 2020-11-13 | 2021-03-02 | 成都通用整流电器研究所 | Direct current microgrid power generation, transmission and distribution system |
| CN112821457A (en) * | 2021-02-26 | 2021-05-18 | 黄俊星 | Storage and charging integrated power system |
| CN113328460A (en) * | 2021-04-12 | 2021-08-31 | 中国电子科技集团公司第十八研究所 | Multifunctional modularized networking intelligent interconnected micro-grid system |
| CN113437743A (en) * | 2021-05-18 | 2021-09-24 | 深圳供电局有限公司 | Power supply system |
| CN114243782A (en) * | 2021-12-23 | 2022-03-25 | 温州大学 | Hybrid energy storage energy routing management system based on wave energy power generation |
| CN114362127A (en) * | 2021-06-22 | 2022-04-15 | 清华四川能源互联网研究院 | Direct-current micro-grid system containing solid oxide fuel cell and control method thereof |
| CN115296329A (en) * | 2022-06-17 | 2022-11-04 | 北京四方继保工程技术有限公司 | Grid-connected operation control method for hydrogen energy power generation system of micro-grid |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242337A (en) * | 2014-08-14 | 2014-12-24 | 广东易事特电源股份有限公司 | Real-time coordination and control method of photovoltaic micro-grid system |
| KR20150090371A (en) * | 2014-01-28 | 2015-08-06 | 삼화전기주식회사 | Active type energy storage system |
| KR20160031154A (en) * | 2014-09-12 | 2016-03-22 | 한국전기연구원 | Bidirectional Power Converter |
| US20160204654A1 (en) * | 2015-01-13 | 2016-07-14 | Inertech Ip Llc | Power sources and systems utilizing a common ultra-capacitor and battery hybrid energy storage system for both uninterruptible power supply and generator start-up functions |
| CN106786694A (en) * | 2016-12-21 | 2017-05-31 | 太原理工大学 | A kind of bipolarity direct-current grid mixed energy storage system control method for coordinating |
| CN106877368A (en) * | 2015-12-13 | 2017-06-20 | 姚秋丽 | A kind of photovoltaic generation micro-grid system hybrid energy-storing control method |
| CN206658105U (en) * | 2017-04-24 | 2017-11-21 | 南京国电南自电网自动化有限公司 | Hybrid energy-storing formula photo-voltaic power supply for the exchange micro-capacitance sensor voltage control of off-network type |
| CN107482614A (en) * | 2017-08-16 | 2017-12-15 | 南京国电南自电网自动化有限公司 | Suitable for the voltage-controlled hybrid energy-storing control method of off-network type direct-current grid |
| CN108110794A (en) * | 2018-01-11 | 2018-06-01 | 中国石油大学(华东) | A kind of meter and the micro-grid system of micro- source working characteristics and its Passive control method |
| CN108808652A (en) * | 2017-05-02 | 2018-11-13 | 南京理工大学 | A kind of mixed energy storage system hierarchical control method of direct-current grid |
-
2018
- 2018-12-13 CN CN201811522990.XA patent/CN109698495B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150090371A (en) * | 2014-01-28 | 2015-08-06 | 삼화전기주식회사 | Active type energy storage system |
| CN104242337A (en) * | 2014-08-14 | 2014-12-24 | 广东易事特电源股份有限公司 | Real-time coordination and control method of photovoltaic micro-grid system |
| KR20160031154A (en) * | 2014-09-12 | 2016-03-22 | 한국전기연구원 | Bidirectional Power Converter |
| US20160204654A1 (en) * | 2015-01-13 | 2016-07-14 | Inertech Ip Llc | Power sources and systems utilizing a common ultra-capacitor and battery hybrid energy storage system for both uninterruptible power supply and generator start-up functions |
| CN106877368A (en) * | 2015-12-13 | 2017-06-20 | 姚秋丽 | A kind of photovoltaic generation micro-grid system hybrid energy-storing control method |
| CN106786694A (en) * | 2016-12-21 | 2017-05-31 | 太原理工大学 | A kind of bipolarity direct-current grid mixed energy storage system control method for coordinating |
| CN206658105U (en) * | 2017-04-24 | 2017-11-21 | 南京国电南自电网自动化有限公司 | Hybrid energy-storing formula photo-voltaic power supply for the exchange micro-capacitance sensor voltage control of off-network type |
| CN108808652A (en) * | 2017-05-02 | 2018-11-13 | 南京理工大学 | A kind of mixed energy storage system hierarchical control method of direct-current grid |
| CN107482614A (en) * | 2017-08-16 | 2017-12-15 | 南京国电南自电网自动化有限公司 | Suitable for the voltage-controlled hybrid energy-storing control method of off-network type direct-current grid |
| CN108110794A (en) * | 2018-01-11 | 2018-06-01 | 中国石油大学(华东) | A kind of meter and the micro-grid system of micro- source working characteristics and its Passive control method |
Non-Patent Citations (3)
| Title |
|---|
| 张纯江 等: "蓄电池与超级电容混合储能***的控制策略", 《电工技术学报》 * |
| 熊京: "多能互补微网***的优化设计及控制技术", 《中国优秀博硕士学位论文全文数据库(硕士)》 * |
| 王宇: "超级电容与蓄电池混合储能***的能量管理与控制研究", 《中国优秀博硕士学位论文全文数据库(硕士)》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436500A (en) * | 2020-11-13 | 2021-03-02 | 成都通用整流电器研究所 | Direct current microgrid power generation, transmission and distribution system |
| CN112436500B (en) * | 2020-11-13 | 2021-07-20 | 成都通用整流电器研究所 | Direct current microgrid power generation, transmission and distribution system |
| CN112821457A (en) * | 2021-02-26 | 2021-05-18 | 黄俊星 | Storage and charging integrated power system |
| CN112821457B (en) * | 2021-02-26 | 2024-05-31 | 黄俊星 | Storage and charging integrated power system |
| CN113328460A (en) * | 2021-04-12 | 2021-08-31 | 中国电子科技集团公司第十八研究所 | Multifunctional modularized networking intelligent interconnected micro-grid system |
| CN113437743B (en) * | 2021-05-18 | 2023-08-25 | 深圳供电局有限公司 | power supply system |
| CN113437743A (en) * | 2021-05-18 | 2021-09-24 | 深圳供电局有限公司 | Power supply system |
| CN114362127A (en) * | 2021-06-22 | 2022-04-15 | 清华四川能源互联网研究院 | Direct-current micro-grid system containing solid oxide fuel cell and control method thereof |
| CN114362127B (en) * | 2021-06-22 | 2024-02-06 | 清华四川能源互联网研究院 | DC micro-grid system containing solid oxide fuel cell and control method thereof |
| CN114243782B (en) * | 2021-12-23 | 2023-07-25 | 温州大学 | Mixed energy storage energy route management system based on wave energy power generation |
| CN114243782A (en) * | 2021-12-23 | 2022-03-25 | 温州大学 | Hybrid energy storage energy routing management system based on wave energy power generation |
| CN115296329A (en) * | 2022-06-17 | 2022-11-04 | 北京四方继保工程技术有限公司 | Grid-connected operation control method for hydrogen energy power generation system of micro-grid |
| CN115296329B (en) * | 2022-06-17 | 2024-05-10 | 北京四方继保工程技术有限公司 | Grid-connected operation control method for hydrogen energy power generation system of micro-grid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109698495B (en) | 2022-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109698495A (en) | A kind of DC micro power grid system based on super capacitor | |
| Das et al. | Power flow control of PV-wind-battery hybrid renewable energy systems for stand-alone application | |
| CN102545255A (en) | Photovoltaic and micro gas turbine mixed micro grid coordinated operation control method | |
| Liao et al. | A novel power management control strategy for stand-alone photovoltaic power system | |
| CN110912242B (en) | Large disturbance transient stability coordination control method for hybrid energy storage direct current micro-grid | |
| CN106026169B (en) | A kind of composition decomposition optimization method that power distribution network is incorporated to based on more micro-capacitance sensors | |
| Xu et al. | Study on black start strategy of microgrid with PV and multiple energy storage systems | |
| CN110867897A (en) | Coordination control strategy under multi-mode of multi-port energy router | |
| CN105162135B (en) | Cascade connection type static reactive generator and control method | |
| CN109245160A (en) | A kind of light storage grid-connected control method and device for stabilizing photovoltaic power fluctuation | |
| CN107645194A (en) | A kind of wind power plant electric energy quality optimizing system based on energy storage | |
| Xu et al. | Energy management and control strategy for DC micro-grid in data center | |
| WO2017132802A1 (en) | Inverter control device and method for energy interconnection and energy storage of ac bus | |
| Yan et al. | Frequency control strategy of hybrid energy storage system for microgrid based on frequency hysteretic loop | |
| Geng et al. | An improved voltage control strategy for DC microgrid with hybrid storage system | |
| CN107681649A (en) | A kind of method for controlling direct-current grid busbar voltage stable | |
| Ma et al. | Distributed generation system development based on various renewable energy resources | |
| CN106026146A (en) | Energy storage energy router and control method | |
| Wu et al. | Frequency control in microgrids using electric springs | |
| Shi et al. | Power optimization cooperative control strategy for flexible fast interconnection device with energy storage | |
| Zhao et al. | The balance of power system peak load regulation considering the participation of nuclear power plant | |
| Shao et al. | A novel design of fuzzy logic control algorithm for hybrid energy storage system | |
| Wang | Construction of coordinated operation control system of distribution network based on electric energy router | |
| Lili et al. | Design of control strategy for hybrid energy storage system based on coordination and cooperation | |
| Mi et al. | Control and operation of hybrid solar/wind isolated DC micro grid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |