CN108964081A - It is a kind of applied to stablize microgrid energy-storage system output circuit structure - Google Patents
It is a kind of applied to stablize microgrid energy-storage system output circuit structure Download PDFInfo
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- CN108964081A CN108964081A CN201810549670.7A CN201810549670A CN108964081A CN 108964081 A CN108964081 A CN 108964081A CN 201810549670 A CN201810549670 A CN 201810549670A CN 108964081 A CN108964081 A CN 108964081A
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- switching tube
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- storage system
- battery
- parallel
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- 238000004146 energy storage Methods 0.000 title claims abstract description 51
- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 230000005611 electricity Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims 2
- 230000010349 pulsation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in 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
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H02J3/383—
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The present invention relates to a kind of applied to the circuit structure for stablizing the output of microgrid energy-storage system.The circuit includes an inductance L, a capacitor C, a resistance R, a photovoltaic panel PV, a supercapacitor (UUC、RUC), a battery (Ub、Rb), four diodes (D1, D2, D3, D4), four switching tubes (M1, M2, M3, M4).By circuit tandem working of the present invention in micro-capacitance sensor, when energy-storage battery is in charged state, switching tube M2 and M3 cut-off, switching tube M1 and M4 conducting, photovoltaic generating system and power grid charge to energy-storage system.When energy-storage battery is in discharge condition, switching tube M2 and M3 conducting, switching tube M1 and M4 cut-off, energy-storage system is to load discharge.Compared with previous micro-grid energy storage system, fast response time of the present invention can not only be stablized because environment changes the output pulsation of bring photovoltaic cell, can more stabilize the bus power because of caused by load variation and be mutated.
Description
Technical field
The invention belongs to micro-capacitance sensor technical field of energy storage, and in particular to a kind of H bridge DC-DC converter structure.
Background technique
Photovoltaic power generation is affected by environment serious, low with night generated energy at the cloudy day, cannot continue powering load.In addition,
It, cannot quickly and effectively stable bus using only the snap of supercapacitor when bearing power mutation is larger in micro-capacitance sensor
Voltage and current.Therefore, DC bus current caused by the above problem declines rapidly in order to prevent, guarantees the output power of system
Stablize, the measure of adopting is needed quickly and effectively to weaken or inhibit power swing.
Existing conventional method be inhibit current fluctuation using supercapacitor and battery parallel connection, but supercapacitor by
Its amount of capacity and reaction time limitation, cannot fully meet the stabling current demand that load is fluctuated widely.Currently, electric power is electric
In sub- technology DC-DC converter using more and more extensive, suitable converter is added in systems, converter circuit can be utilized
The buffer function of middle inductance, capacitor and switching tube, the output of effective burning voltage electric current.
Summary of the invention
It is fast when in order to overcome the shortcomings of the prior art described above, it is an object of the invention to for microgrid power mutation
The demand of quick-recovery bus current, thus propose it is a kind of applied to the circuit structure for stablizing the output of microgrid energy-storage system, and it is previous
Microgrid energy storing structure compare, fast response time of the present invention, can not only stablize because environment change bring photovoltaic cell output wave
It is dynamic, it can more stabilize the bus power because of caused by load variation and be mutated.
In order to achieve the above object, the technical scheme adopted by the invention is that:
It is a kind of applied to the circuit structure for stablizing the output of microgrid energy-storage system, including an inductance L, a capacitor C, one
Resistance R, a photovoltaic panel PV, a supercapacitor include UUCAnd RUC, a battery include UbAnd Rb, four diodes
D1, D2, D3, D4, four switching tubes M1, M2, M3, M4, it is characterised in that:
(1) photovoltaic panel PV and supercapacitor UUCAnd RUCIt is connected in parallel；
(2) photovoltaic panel PV and battery UbAnd RbIt is connected in parallel；
(3) photovoltaic panel PV is connected in parallel with switching tube M1 and switching tube M2；
(4) switching tube M1 and diode D1 is connected in parallel；Switching tube M2 is connected in parallel with diode D2；Switching tube M3 and two
Pole pipe D3 is connected in parallel；Switching tube M4 is connected in parallel with diode D4；
(5) capacitor C and resistance R is connected in parallel；
It (6) is in star-like connection with inductance L between switching tube M1 and switching tube M2；And the other end of inductance L and capacitor C are positive
Connection；
(7) capacitor C anode is connect with inductance L, and cathode and switching tube M3 and switching tube M4 are in star-like connection.
Further, circuit is in parallel with DC bus.
Further, when energy-storage battery is in charged state, busbar voltage is greater than two sections of electricity of battery and supercapacitor
Pressure, therefore switching tube M2 and M3 end, switching tube M1 and M4 conducting, photovoltaic generating system and power grid charge to energy-storage system, open
Pipe M1 control parameter is closed to meet:
In above formula, IHESSIt is the magnitude of current stored in mixed energy storage system；ka、kbIt is based on the excessive of energy-storage battery electric current
Period adjustable parameter.
Further, when energy-storage battery is in discharge condition, busbar voltage is less than two sections of electricity of battery and supercapacitor
Pressure, therefore switching tube M2 and M3 are connected, switching tube M1 and M4 cut-off, energy-storage system is to load discharge, switching tube M3 control parameter
Meet:
In above formula, IHESSIt is the magnitude of current stored in mixed energy storage system；ka、kbIt is based on the excessive of energy-storage battery electric current
Period adjustable parameter.
Further, when energy-storage battery is in standby mode, busbar voltage is between charging voltage and discharge voltage, this
When do not need supercapacitor and battery composition mixed energy storage system powering load, in order to keep current cycle, at this time
There are two types of working condition: (1) M1 is connected, M4 shutdown, and the freewheeling diode of M1 and M3 form circuit, this state is led M4 is next
Before the logical period；(2) M3 is connected, M2 shutdown, and the freewheeling diode of M3 and M1 form circuit, this state is in the next turn-on cycle of M2
Before.
Compared with prior art, the invention has the following advantages that (1) circuit of the present invention is unstable in photovoltaic cell output voltage
Periodically, busbar voltage can be adjusted by what shutdown of the conducting of energy-storage battery and the switching tube of converter, does not influence to load
Normal power supply；(2) when load sudden change, the present invention can be by controlling the conducting of corresponding switching tube and pass in converter
It is disconnected, immediate stability bus current, to stabilize bus power fluctuation.
Detailed description of the invention
Fig. 1 is circuit topological structure schematic diagram of the present invention.
Fig. 2 is equivalent circuit diagram of the circuit of the present invention when charging to energy-storage battery.
Fig. 3 is equivalent circuit diagram of the circuit energy-storage battery of the present invention in powering load.
Fig. 4 is equivalent circuit diagram of the circuit of the present invention when standby.
Specific embodiment
For the ease of those of ordinary skill in the art understand and implement the present invention, below with reference to embodiment to the present invention make into
The detailed description of one step, it should be understood that implementation example described herein is merely to illustrate and explain the present invention, and is not used to limit
The fixed present invention.
Fig. 1 is circuit topological structure schematic diagram of the present invention, it is main including an inductance L, a capacitor C, a resistance R,
One photovoltaic panel PV, a supercapacitor (UUC、RUC), a battery (Ub、Rb), four diodes (D1, D2, D3, D4),
Four switching tubes (M1, M2, M3, M4), the annexation figure of each original part are as shown in Figure 1.Wherein:
(1) photovoltaic panel PV and supercapacitor UUCAnd RUCIt is connected in parallel；
(2) photovoltaic panel PV and battery UbAnd RbIt is connected in parallel；
(3) photovoltaic panel PV is connected in parallel with switching tube M1 and switching tube M2；
(4) switching tube M1 and diode D1 is connected in parallel；Switching tube M2 is connected in parallel with diode D2；Switching tube M3 and two
Pole pipe D3 is connected in parallel；Switching tube M4 is connected in parallel with diode D4；
(5) capacitor C and resistance R is connected in parallel；
It (6) is in star-like connection with inductance L between switching tube M1 and switching tube M2；And the other end of inductance L and capacitor C are positive
Connection；
(7) capacitor C anode is connect with inductance L, and cathode and switching tube M3 and switching tube M4 are in star-like connection.
The circuit is in parallel with DC bus.
When energy-storage battery is in charged state, busbar voltage is greater than two sections of voltages of battery and supercapacitor, therefore switchs
Pipe M2 and M3 cut-off, switching tube M1 and M4 conducting, photovoltaic generating system and power grid charge to energy-storage system.Its switching tube M1 control
Parameter meets:
In above formula, IHESSIt is the magnitude of current stored in mixed energy storage system；ka、kbIt is based on the excessive of energy-storage battery electric current
Period adjustable parameter.
When energy-storage battery is in discharge condition, busbar voltage is less than two sections of voltages of battery and supercapacitor, therefore switchs
Pipe M2 and M3 conducting, switching tube M1 and M4 cut-off, energy-storage system is to load discharge.Its switching tube M3 control parameter meets:
In above formula, IHESSIt is the magnitude of current stored in mixed energy storage system；ka、kbIt is based on the excessive of energy-storage battery electric current
Period adjustable parameter.
When energy-storage battery is in standby mode, busbar voltage is between charging voltage and discharge voltage, is not needed at this time
The mixed energy storage system powering load of supercapacitor and battery composition, in order to keep current cycle, there are two types of works at this time
Make situation: (1) M1 is connected, M4 shutdown, and the freewheeling diode of M1 and M3 form circuit.This state is in the next turn-on cycle of M4
Before；(2) M3 is connected, M2 shutdown, and the freewheeling diode of M3 and M1 form circuit.This state is before the next turn-on cycle of M2.
Fig. 2 is equivalent circuit diagram of the circuit of the present invention when charging to energy-storage battery.Switching tube M2 and M3 in Fig. 1 at this time
Cut-off, switching tube M1 and M4 conducting, the present invention can be equivalent to structure shown in Fig. 2.
Fig. 3 is equivalent circuit diagram of the circuit energy-storage battery of the present invention in powering load.Switching tube M1 in Fig. 1 at this time
End with M4, switching tube M2 and M3 conducting, the present invention can be equivalent to structure shown in Fig. 3.
Fig. 4 is equivalent circuit diagram of the circuit of the present invention when standby.There are two types of working conditions at this time: (1) M1 in Fig. 1 is led
It is logical, M4 shutdown, the freewheeling diode composition circuit of M1 and M3.This state is before the next turn-on cycle of M4；(2) M3 in Fig. 1
The freewheeling diode of conducting, M2 shutdown, M3 and M1 form circuit.This state is before the next turn-on cycle of M2.The present invention can wait
Effect is structure shown in Fig. 4 (a) (b).
It should be understood that the part that this specification does not elaborate belongs to the prior art.
It should be understood that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this
The limitation of invention patent protection range, those skilled in the art under the inspiration of the present invention, are not departing from power of the present invention
Benefit requires to make replacement or deformation under protected ambit, fall within the scope of protection of the present invention, this hair
It is bright range is claimed to be determined by the appended claims.
Claims (5)
1. a kind of applied to the circuit structure for stablizing the output of microgrid energy-storage system, including an inductance L, a capacitor C, an electricity
Hindering R, a photovoltaic panel PV, a supercapacitor includes UUCAnd RUC, a battery include UbAnd Rb, four diode D1,
D2, D3, D4, four switching tubes M1, M2, M3, M4, it is characterised in that:
(1) photovoltaic panel PV and supercapacitor UUCAnd RUCIt is connected in parallel；
(2) photovoltaic panel PV and battery UbAnd RbIt is connected in parallel；
(3) photovoltaic panel PV is connected in parallel with switching tube M1 and switching tube M2；
(4) switching tube M1 and diode D1 is connected in parallel；Switching tube M2 is connected in parallel with diode D2；Switching tube M3 and diode
D3 is connected in parallel；Switching tube M4 is connected in parallel with diode D4；
(5) capacitor C and resistance R is connected in parallel；
It (6) is in star-like connection with inductance L between switching tube M1 and switching tube M2；And the other end of inductance L and capacitor C anode connect
It connects；
(7) capacitor C anode is connect with inductance L, and cathode and switching tube M3 and switching tube M4 are in star-like connection.
2. the as described in claim 1 circuit structure for being applied to stablize the output of microgrid energy-storage system, it is characterised in that: circuit with
DC bus is in parallel.
3. the circuit structure as described in claim 1 for being applied to stablize the output of microgrid energy-storage system, it is characterised in that: work as energy storage
For battery in charged state, busbar voltage is greater than two sections of voltages of battery and supercapacitor, therefore switching tube M2 and M3 end, and open
Pipe M1 and M4 conducting are closed, photovoltaic generating system and power grid charge to energy-storage system, and switching tube M1 control parameter meets:
In above formula, IHESSIt is the magnitude of current stored in mixed energy storage system；ka、kbIt is the transition period based on energy-storage battery electric current
Adjustable parameter.
4. the circuit structure as described in claim 1 for being applied to stablize the output of microgrid energy-storage system, it is characterised in that: work as energy storage
For battery in discharge condition, busbar voltage is less than two sections of voltages of battery and supercapacitor, therefore switching tube M2 and M3 are connected, and open
Pipe M1 and M4 cut-off are closed, energy-storage system meets to load discharge, switching tube M3 control parameter:
In above formula, IHESSIt is the magnitude of current stored in mixed energy storage system；ka、kbIt is the transition period based on energy-storage battery electric current
Adjustable parameter.
5. the circuit structure as described in claim 1 for being applied to stablize the output of microgrid energy-storage system, it is characterised in that: work as energy storage
In standby mode, busbar voltage is between charging voltage and discharge voltage battery, does not need supercapacitor and storage at this time
The mixed energy storage system powering load of battery composition, in order to keep current cycle, there are two types of working conditions at this time: (1) M1 is led
Logical, M4 shutdown, the freewheeling diode composition circuit of M1 and M3, this state is before the next turn-on cycle of M4；(2) M3 is connected, M2
The freewheeling diode of shutdown, M3 and M1 form circuit, this state is before the next turn-on cycle of M2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810549670.7A CN108964081B (en) | 2018-05-31 | 2018-05-31 | Circuit structure applied to stabilizing output of micro-grid energy storage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810549670.7A CN108964081B (en) | 2018-05-31 | 2018-05-31 | Circuit structure applied to stabilizing output of micro-grid energy storage system |
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| Publication Number | Publication Date |
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| CN108964081A true CN108964081A (en) | 2018-12-07 |
| CN108964081B CN108964081B (en) | 2022-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109733223A (en) * | 2019-01-14 | 2019-05-10 | 南京航空航天大学 | A kind of assisted charging system and its control method |
| WO2023160567A1 (en) * | 2022-02-22 | 2023-08-31 | 广州疆海科技有限公司 | Pv charging circuit capable of reversely outputting direct-current voltage source |
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| CN107401720A (en) * | 2017-06-22 | 2017-11-28 | 芜湖纯元光电设备技术有限公司 | One kind carries stand-by power supply solar LED street lamp |
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2018
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| US20100198421A1 (en) * | 2009-01-30 | 2010-08-05 | Board Of Regents, The University Of Texas System | Methods and Apparatus for Design and Control of Multi-port Power Electronic Interface for Renewable Energy Sources |
| CN101895198A (en) * | 2010-06-18 | 2010-11-24 | 华南理工大学 | Current feed three-inductor boost converter of high frequency transformer connected in delta/Y shape |
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| Publication number | Publication date |
|---|---|
| CN108964081B (en) | 2022-01-04 |
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