CN110445169A - From grid-connected photovoltaic energy-storage system and its control method - Google Patents
From grid-connected photovoltaic energy-storage system and its control method Download PDFInfo
- Publication number
- CN110445169A CN110445169A CN201910632572.4A CN201910632572A CN110445169A CN 110445169 A CN110445169 A CN 110445169A CN 201910632572 A CN201910632572 A CN 201910632572A CN 110445169 A CN110445169 A CN 110445169A
- Authority
- CN
- China
- Prior art keywords
- grid
- switch
- storage system
- energy
- photovoltaic energy
- 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.)
- Pending
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 157
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000005611 electricity Effects 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 9
- 229910021419 crystalline silicon Inorganic materials 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation 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
- H02J3/28—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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The application discloses a kind of from grid-connected photovoltaic energy-storage system and its control method, and described from grid-connected photovoltaic energy-storage system includes photovoltaic module, DC/DC booster converter, two-way DC/AC converter, two-way DC/DC converter, energy-storage battery, first switch, second switch, third switch, the 4th switch, the first load, the second load and current sensor.The application is by devices compositions such as first switch, second switch, third switch, the 4th switch, the first load, the second load and current sensors from grid-connected photovoltaic energy-storage system；Solve, existing from grid-connected photovoltaic energy-storage system and its control method be difficult meet different user different the needs of, cannot achieve the benefit of different user the problem of more from grid-connected photovoltaic energy-storage system user demand type；Meet a variety of demands of user, realizes the benefit of user.
Description
Technical field
This application involves power electronics field, more particularly to it is a kind of from grid-connected photovoltaic energy-storage system and its controlling party
Method.
Background technique
With the development of science and technology and the size of population increases, and people are also increasing to the demand of the energy, and
Although conventional fossil energy is able to solve the energy problem of people, but can bring serious environmental pollution, solar energy simultaneously
Photovoltaic power generation technology is because its good environmental protection is valued by the people, and its discharge that can greatly reduce pollutants in air, right
It preserves the ecological environment and plays good beneficial effect.
Increase energy-storage battery in photovoltaic generating system, can be formed a set of from grid-connected photovoltaic energy-storage system.From grid-connected photovoltaic
Energy-storage system user demand type is more, and different user tool has different needs, such as off-network operating mode, remaining electricity of generating power for their own use
On-line work mode, counterflow-preventing operating mode, timing charge/discharge operation mode etc..Existing control method is difficult to meet different
The different demand of user, therefore often cannot achieve the benefit of different user.
Summary of the invention
In view of this, being designed to provide for the application is a kind of from grid-connected photovoltaic energy-storage system and its control method, with solution
It is certainly more from grid-connected photovoltaic energy-storage system user demand type, it is existing to be difficult from grid-connected photovoltaic energy-storage system and its control method
The problem of meeting the needs of different user is different, cannot achieve the benefit of different user.
It is as follows that the application solves technical solution used by above-mentioned technical problem:
According to the one aspect of the application, what is provided is a kind of from grid-connected photovoltaic energy-storage system, described from grid-connected photovoltaic energy storage
System includes photovoltaic module, DC/DC booster converter, two-way DC/AC converter, two-way DC/DC converter, energy-storage battery,
One switch, second switch, third switch, the 4th switch, the first load, the second load and current sensor；
One end of the DC/DC booster converter is connect with the photovoltaic module, the DC/DC booster converter it is another
End is connect with one end of one end of the two-way DC/AC converter and the two-way DC/DC converter, and the two-way DC/DC becomes
The other end of parallel operation is connect with the energy-storage battery；
The other end of the two-way DC/AC converter and one end of the first switch and one end of the second switch connect
It connects, the other end of the first switch is connect by the current sensor and the 4th switch with power grid, and described second opens
The other end of pass and first load connect；
One end of the third switch and the other end of the second switch and first load connect, and the third is opened
The other end of pass is connect with the other end of the first switch；Second load is connect with the other end of the first switch.
In one embodiment, the first switch, the second switch, third switch, the 4th switch
For one of relay, contactor, power switch tube.
In one embodiment, the photovoltaic module is that crystal silicon solar battery component is connected and/or composed in parallel.
According to further aspect of the application, one kind control method from grid-connected photovoltaic energy-storage system provided, institute
Stating the control method from grid-connected photovoltaic energy-storage system includes:
Whether detection power grid powers off；
In the case where the grid cut-off, control is described to enter off-network operating mode from grid-connected photovoltaic energy-storage system.
In one embodiment, entering off-network operating mode from grid-connected photovoltaic energy-storage system described in the control includes:
Control first switch disconnection, second switch closure, the disconnection of third switch and the 4th switch disconnection；Or control institute
First switch closure, second switch closure, the disconnection of third switch and the 4th switch is stated to disconnect.
In one embodiment, described in the case where the grid cut-off, it controls described from grid-connected photovoltaic energy storage system
System enters off-network operating mode, later further include:
Whether detection photovoltaic module has electric current output；
The photovoltaic module have electric current output in the case where, control it is described from grid-connected photovoltaic energy-storage system enter daytime from
Net operating mode；
In the case where the photovoltaic module does not have electric current output, control is described to enter night from grid-connected photovoltaic energy-storage system
Off-network operating mode.
In one embodiment, whether the detection power grid powers off, later further include:
In the case where the power grid does not power off, control is described to enter grid-connected Working mould from grid-connected photovoltaic energy-storage system
Formula.
In one embodiment, entering grid-connected operating mode from grid-connected photovoltaic energy-storage system described in the control includes:
Control first switch closure, second switch disconnects, third closes the switch and the 4th closes the switch.
In one embodiment, the grid-connected operating mode includes remaining electricity online mode of generating power for their own use；
Entering grid-connected operating mode from grid-connected photovoltaic energy-storage system described in the control includes:
It is described from grid-connected photovoltaic energy-storage system enter described in generate power for their own use remaining electricity online mode in the case where, according to preparatory
The timing charge and discharge period control for the remaining electricity online mode of generating power for their own use being arranged is described from grid-connected photovoltaic energy-storage system
Operation.
In one embodiment, the grid-connected operating mode includes anti-reverse stream mode；
Entering grid-connected operating mode from grid-connected photovoltaic energy-storage system described in the control includes:
It is described from grid-connected photovoltaic energy-storage system enter the anti-reverse stream mode in the case where, according to pre-set described
The timing charge and discharge period of anti-reverse stream mode controls the operation from grid-connected photovoltaic energy-storage system.
The embodiment of the present application from grid-connected photovoltaic storage system and its control method, pass through photovoltaic module, DC/DC boosting inverter
Device, two-way DC/AC converter, two-way DC/DC converter, energy-storage battery, first switch, second switch, third switch, the 4th open
Close, first load, second load and current sensor constitute from grid-connected photovoltaic energy-storage system；It solves and is stored up from grid-connected photovoltaic
Energy system user demand type is more, existing to be difficult to meet different user not from grid-connected photovoltaic energy-storage system and its control method
With demand, the problem of cannot achieve the benefit of different user；Meet a variety of demands of user, realizes the interests of user
It maximizes.
Detailed description of the invention
Fig. 1 is the embodiment of the present application from grid-connected photovoltaic storage system structural schematic diagram；
Fig. 2 is the control method flow diagram from grid-connected photovoltaic storage system of the embodiment of the present application；
Fig. 3 is the off-network operating mode flow diagram on daytime from grid-connected photovoltaic storage system of the embodiment of the present application；
Fig. 4 is the night off-network operating mode flow diagram from grid-connected photovoltaic storage system of the embodiment of the present application.
The embodiments will be further described with reference to the accompanying drawings for realization, functional characteristics and the advantage of the application purpose.
Specific embodiment
In order to be clearer and more clear technical problems to be solved in this application, technical solution and beneficial effect, tie below
Drawings and examples are closed, the application is further elaborated.It should be appreciated that specific embodiment described herein is only
To explain the application, it is not used to limit the application.
In the description of the present application, it is to be understood that "center" in term, "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of instructions such as " right sides " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this Shen
It is please described with simplified, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation
Construction and operation, therefore should not be understood as the limitation to the application.In addition, term " first ", " second " are used for description purposes only,
It is not understood to indicate or imply relative importance.
First embodiment
The application first embodiment provide it is a kind of from grid-connected photovoltaic energy-storage system, it is described to include from grid-connected photovoltaic energy-storage system
Photovoltaic module, DC/DC booster converter, two-way DC/AC converter, two-way DC/DC converter, energy-storage battery, first switch K1,
Second switch K2, third switch K3, the 4th switch K4, the first load, the second load and current sensor SH1；
One end of the DC/DC booster converter is connect with the photovoltaic module, the DC/DC booster converter it is another
End is connect with one end of one end of the two-way DC/AC converter and the two-way DC/DC converter, and the two-way DC/DC becomes
The other end of parallel operation is connect with the energy-storage battery；
The one of the other end of the two-way DC/AC converter and one end of the first switch K1 and the second switch K2
The other end of end connection, the first switch K1 is connected by the current sensor SH1 and the 4th switch K4 and power grid G
It connects, the other end of the second switch K2 and first load connect；
One end of the third switch K3 and the other end of the second switch K2 and first load connect, and described the
The other end of three switch K3 is connect with the other end of the first switch K1；Second load is another with the first switch K1's
One end connection.
In the present embodiment, the first switch K1, the second switch K2, the third switch K3, the described 4th open
Pass K4 is one of relay, contactor, power switch tube.
In the present embodiment, the photovoltaic module is that crystal silicon solar battery component is connected and/or composed in parallel.
The embodiment of the present application from grid-connected photovoltaic energy-storage system, pass through photovoltaic module, DC/DC booster converter, two-way DC/
It is AC converter, two-way DC/DC converter, energy-storage battery, first switch, second switch, third switch, the 4th switch, first negative
Carry, second load and current sensor constitute from grid-connected photovoltaic energy-storage system；It solves and is used from grid-connected photovoltaic energy-storage system
Family demand type is more, existing to be difficult to meet the different need of different user from grid-connected photovoltaic energy-storage system and its control method
The problem of asking, cannot achieve the benefit of different user；Meet a variety of demands of user, the interests for realizing user are maximum
Change.
Second embodiment
As shown in Fig. 2, the application second embodiment provides a kind of control method from grid-connected photovoltaic energy-storage system, wherein
It can refer to content described in first embodiment from grid-connected photovoltaic energy-storage system, therefore not to repeat here.It is described from grid-connected photovoltaic energy storage system
The control method of system comprising steps of
Whether S11, detection power grid power off.
S12, in the case where the grid cut-off, control and described enter off-network Working mould from grid-connected photovoltaic energy-storage system
Formula.
Understood incorporated by reference to Fig. 1, in one embodiment, is entered described in the control from grid-connected photovoltaic energy-storage system
Off-network operating mode includes:
First switch K1 disconnection, second switch K2 closure, third switch K3 disconnection and the 4th switch K4 is controlled to disconnect；Or
Person controls the first switch K1 closure, the second switch K2 is closed, the third switch K3 is disconnected and the described 4th opens
K4 is closed to disconnect.
In this embodiment, it is described enter off-network operating mode from grid-connected photovoltaic energy-storage system when, can give first
Load is powered, and can be powered to the first load and the second load.
In one embodiment, described in the case where the grid cut-off, it controls described from grid-connected photovoltaic energy storage system
System enters off-network operating mode, later further include:
Whether detection photovoltaic module has electric current output；
The photovoltaic module have electric current output in the case where, control it is described from grid-connected photovoltaic energy-storage system enter daytime from
Net operating mode；
In the case where the photovoltaic module does not have electric current output, control is described to enter night from grid-connected photovoltaic energy-storage system
Off-network operating mode.
In this embodiment, enter off-network operating mode on daytime, photovoltaic module from grid-connected photovoltaic energy-storage system described
With the common powering load of energy-storage battery.Concrete condition can be as follows:
If a), photovoltaic module energy is abundant, photovoltaic module powering load, extra electric energy charges to energy-storage battery；
If b), photovoltaic module energy is abundant and energy-storage battery has been filled with, photovoltaic module powering load and photovoltaic module
Operate in limit power rating；
If c) photovoltaic module energy is insufficient, photovoltaic module and the common powering load of energy-storage battery.
In order to preferably illustrate off-network operating mode on daytime, below in conjunction with Fig. 3 to from grid-connected photovoltaic energy-storage system on daytime
Workflow under off-network operating mode is illustrated:
Since photovoltaic module energy has the characteristics that unstable, therefore in order to increase system reliability, system must protect when working
It demonstrate,proves energy-storage battery electricity and is higher than certain value, such as 10% specified electric quantity, energy-storage battery can be prevented to be in deep discharge conditions.
As shown in figure 3, first determining whether energy-storage battery electricity whether less than 10%.If energy-storage battery electricity is less than 10%, light
Volt component does not work to energy-storage battery charging, two-way DC/AC converter.
If energy-storage battery electricity judges energy-storage battery not less than 10% or after photovoltaic module is to energy-storage battery charging
Whether electricity is greater than 15%.If energy-storage battery electricity is greater than 15%, photovoltaic module operation, the work of two-way DC/AC converter are defeated
Constant pressure, energy-storage battery enter charge and discharge mode out.Otherwise, photovoltaic module continues to energy-storage battery charging, two-way DC/AC converter
It does not work.
Next, it is determined that whether energy-storage battery electricity is greater than 95%.If energy-storage battery electricity is greater than 95%, photovoltaic module stops
Only power supply, two-way DC/AC converter work output constant pressure, energy-storage battery electric discharge.Otherwise, photovoltaic module continue to run, two-way DC/
AC converter work output constant pressure, energy-storage battery enter charge and discharge mode.
After photovoltaic module stops power supply, judge whether energy-storage battery electricity is lower than 90%.If energy-storage battery electricity is low
In 90%, then photovoltaic module operation, two-way DC/AC converter work output constant pressure, energy-storage battery enter charge and discharge mode.It is no
Then, photovoltaic module continues to stop power supply.
In this embodiment, enter night off-network operating mode, only energy storage from grid-connected photovoltaic energy-storage system described
Battery powering load.
In order to preferably illustrate night off-network operating mode, below in conjunction with Fig. 4 to from grid-connected photovoltaic energy-storage system at night
Workflow under off-network operating mode is illustrated:
Under night off-network operating mode, in order to guarantee the energy-storage battery service life, energy-storage battery is not allowed to be in deep discharge shape
State, therefore energy-storage battery discharging condition is limited, when energy-storage battery capacity is greater than certain value, such as 15% rated capacity,
Just system off-network is allowed to work, allows energy-storage battery capacity lower than certain value, such as 10% rated capacity, system stalls.
As shown in figure 4, first determining whether energy-storage battery electricity whether less than 15%.If energy-storage battery electricity less than 15%, from
Grid-connected photovoltaic energy-storage system stops working.
If energy-storage battery electricity is not less than 15%, photovoltaic module operation, two-way DC/AC converter work output constant pressure, storage
Energy battery enters charge and discharge mode.
Next, it is determined that whether energy-storage battery electricity is less than 10%.If energy-storage battery electricity less than 10%, is stored up from grid-connected photovoltaic
It can system stalls.Otherwise, system continues to run.
It refer again to shown in Fig. 2, in one embodiment, whether the detection power grid powers off, later further include:
S13, in the case where the power grid does not power off, control it is described from grid-connected photovoltaic energy-storage system into grid-connected work
Mode.
Understood incorporated by reference to Fig. 1, in one embodiment, is entered described in the control from grid-connected photovoltaic energy-storage system
Grid-connected operating mode includes:
Control first switch closure, second switch disconnects, third closes the switch and the 4th closes the switch.
In this embodiment, it is described from grid-connected photovoltaic energy-storage system enter grid-connected operating mode when, to first load
It is powered with the second load.
Under grid-connected operating mode, it can work from grid-connected photovoltaic energy-storage system in remaining electricity online mode of generating power for their own use, it can also
To work in anti-reverse stream mode (not allowing energy feed-in power grid).Furthermore it is possible to the timing charge and discharge period is set, and such as: it puts
The electric period is set as evening 19:00-23:00, and charging time section is set as 1:00- morning, 5:00 morning, i.e., in grid costs
During low value, power grid charges to energy-storage battery；During grid costs peak value, energy-storage battery electric discharge powering load.
In one embodiment, entering grid-connected operating mode from grid-connected photovoltaic energy-storage system described in the control includes:
It is described from grid-connected photovoltaic energy-storage system enter described in generate power for their own use remaining electricity online mode in the case where, according to preparatory
The timing charge and discharge period control for the remaining electricity online mode of generating power for their own use being arranged is described from grid-connected photovoltaic energy-storage system
Operation.
In this embodiment, according to remaining electricity online mode and the timing charge and discharge period of generating power for their own use:
If 1, photovoltaic module has electric current output
The working condition from grid-connected photovoltaic energy-storage system can be as follows:
A), photovoltaic module energy is sufficient, the use of photovoltaic module energy is preferentially load supplying, after load supplying, electricity
Can it is still rich after, then extra photovoltaic module energy gives energy-storage battery charging, if there are also excess energy, extra energy is incorporated to
Power grid.
B), photovoltaic module energy is insufficient, if photovoltaic module and power grid give load to supply jointly not within the timing discharging period
Electricity；
C), photovoltaic module energy is insufficient, if within the timing discharging period, and photovoltaic module energy and energy-storage battery energy
It is able to satisfy load supplying, then photovoltaic module and the common powering load of energy-storage battery；
D), photovoltaic module energy is insufficient, if within the timing discharging period, and photovoltaic module energy and energy-storage battery energy
It is not able to satisfy load supplying, then the common powering load of photovoltaic module, energy-storage battery, power grid；
If e), in timing charging time section needing that power grid is preferentially allowed to charge to energy-storage battery.
If 2, photovoltaic module does not have electric current output
The working condition from grid-connected photovoltaic energy-storage system can be as follows:
If a), within the timing discharging period, energy-storage battery powering load is prevented non-return by current sensor SH1
Stream guarantees energy-storage battery energy powering load.
If needing that power grid is preferentially allowed to charge to energy-storage battery, while loading and only using power grid energy b), in charging time section
Amount.
If power grid energy is only used in load c), not within the charge and discharge period.
In one embodiment, entering grid-connected operating mode from grid-connected photovoltaic energy-storage system described in the control includes:
It is described from grid-connected photovoltaic energy-storage system enter the anti-reverse stream mode in the case where, according to pre-set described
The timing charge and discharge period of anti-reverse stream mode controls the operation from grid-connected photovoltaic energy-storage system.
In this embodiment, according to anti-reverse stream mode and timing charge and discharge period:
If 1, photovoltaic module has electric current output
The working condition from grid-connected photovoltaic energy-storage system can be as follows:
A), photovoltaic module energy is sufficient, the use of photovoltaic module energy is preferentially user load power supply, if load supplying
Afterwards, after electric energy is still rich, then extra photovoltaic module energy charges the battery, if photovoltaic module needs there are also excess energy
Power operation is limited, realizes counterflow-preventing function.
B), photovoltaic module energy is insufficient, if photovoltaic module and power grid give load jointly not within the timing discharging period
Power supply；
C), photovoltaic module energy is insufficient, if within the timing discharging period, and photovoltaic module energy and energy-storage battery energy
It is able to satisfy load supplying, then photovoltaic module and the common powering load of energy-storage battery；
D), photovoltaic module energy is insufficient, if within the timing discharging period, and photovoltaic module energy and energy-storage battery energy
It is not able to satisfy load supplying, then photovoltaic module, energy-storage battery, power grid are powered to user load jointly；
If e), in timing charging time section needing that power grid is preferentially allowed to charge to energy-storage battery.
If 2, photovoltaic module does not have electric current output
The working condition from grid-connected photovoltaic energy-storage system can be as follows:
If a), within the timing discharging period, energy-storage battery powering load is prevented non-return by current sensor SH1
Stream guarantees energy-storage battery energy powering load.
If needing that power grid is preferentially allowed to charge to energy-storage battery, while loading and only using power grid energy b), in charging time section
Amount.
If power grid energy is only used in load c), not within the charge and discharge period.
The control method from grid-connected photovoltaic energy-storage system of the embodiment of the present application passes through photovoltaic module, DC/DC boosting inverter
Device, two-way DC/AC converter, two-way DC/DC converter, energy-storage battery, first switch, second switch, third switch, the 4th open
Close, first load, second load and current sensor constitute from grid-connected photovoltaic energy-storage system；It solves and is stored up from grid-connected photovoltaic
Energy system user demand type is more, existing to be difficult to meet different user not from grid-connected photovoltaic energy-storage system and its control method
With demand, the problem of cannot achieve the benefit of different user；Meet a variety of demands of user, realizes the interests of user
It maximizes.
Above by reference to Detailed description of the invention preferred embodiment of the present application, not thereby limit to the interest field of the application.This
Field technical staff does not depart from made any modifications, equivalent replacements, and improvements in scope of the present application and essence, should all be at this
Within the interest field of application.
Claims (10)
1. a kind of from grid-connected photovoltaic energy-storage system, which is characterized in that it is described from grid-connected photovoltaic energy-storage system include photovoltaic module,
DC/DC booster converter, two-way DC/AC converter, two-way DC/DC converter, energy-storage battery, first switch, second switch,
Three switches, the 4th switch, the first load, the second load and current sensor；
One end of the DC/DC booster converter is connect with the photovoltaic module, the other end of the DC/DC booster converter with
One end of the two-way DC/AC converter is connected with one end of the two-way DC/DC converter, the two-way DC/DC converter
The other end connect with the energy-storage battery；
The other end of the two-way DC/AC converter is connect with one end of one end of the first switch and the second switch,
The other end of the first switch is connect by the current sensor and the 4th switch with power grid, the second switch
The other end and first load connect；
One end of the third switch and the other end of the second switch and first load connect, the third switch
The other end is connect with the other end of the first switch；Second load is connect with the other end of the first switch.
2. according to claim 1 from grid-connected photovoltaic energy-storage system, which is characterized in that the first switch, described second
Switch, third switch, the 4th switch are one of relay, contactor, power switch tube.
3. according to claim 1 from grid-connected photovoltaic energy-storage system, which is characterized in that the photovoltaic module be crystalline silicon too
Positive energy battery component is connected and/or is composed in parallel.
4. a kind of based on any control method from grid-connected photovoltaic energy-storage system of claim 1-3, which is characterized in that institute
Stating the control method from grid-connected photovoltaic energy-storage system includes:
Whether detection power grid powers off；
In the case where the grid cut-off, control is described to enter off-network operating mode from grid-connected photovoltaic energy-storage system.
5. the control method according to claim 4 from grid-connected photovoltaic energy-storage system, which is characterized in that described in the control
Entering off-network operating mode from grid-connected photovoltaic energy-storage system includes:
Control first switch disconnection, second switch closure, the disconnection of third switch and the 4th switch disconnection；Or control described the
One closes the switch, second switch closure, third switch disconnect and the 4th switch disconnects.
6. the control method according to claim 4 from grid-connected photovoltaic energy-storage system, which is characterized in that described in the electricity
In the case where net power-off, control is described to enter off-network operating mode from grid-connected photovoltaic energy-storage system, later further include:
Whether detection photovoltaic module has electric current output；
In the case where the photovoltaic module has electric current output, control is described to enter off-network work on daytime from grid-connected photovoltaic energy-storage system
Operation mode；
In the case where the photovoltaic module does not have electric current output, control is described to enter night off-network from grid-connected photovoltaic energy-storage system
Operating mode.
7. the control method according to claim 4 from grid-connected photovoltaic energy-storage system, which is characterized in that the detection power grid
Whether power off, later further include:
In the case where the power grid does not power off, control is described to enter grid-connected operating mode from grid-connected photovoltaic energy-storage system.
8. the control method according to claim 7 from grid-connected photovoltaic energy-storage system, which is characterized in that described in the control
Entering grid-connected operating mode from grid-connected photovoltaic energy-storage system includes:
Control first switch closure, second switch disconnects, third closes the switch and the 4th closes the switch.
9. the control method according to claim 7 from grid-connected photovoltaic energy-storage system, which is characterized in that the grid-connected work
Mode includes remaining electricity online mode of generating power for their own use；
Entering grid-connected operating mode from grid-connected photovoltaic energy-storage system described in the control includes:
It is described from grid-connected photovoltaic energy-storage system enter described in generate power for their own use remaining electricity online mode in the case where, according to presetting
Timing charge and discharge period of the remaining electricity online mode of generating power for their own use control the operation from grid-connected photovoltaic energy-storage system.
10. the control method according to claim 7 from grid-connected photovoltaic energy-storage system, which is characterized in that the grid-connected work
Operation mode includes anti-reverse stream mode；
Entering grid-connected operating mode from grid-connected photovoltaic energy-storage system described in the control includes:
It is described from grid-connected photovoltaic energy-storage system enter the anti-reverse stream mode in the case where, according to pre-set described anti-reverse
The timing charge and discharge period of stream mode controls the operation from grid-connected photovoltaic energy-storage system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910632572.4A CN110445169A (en) | 2019-07-13 | 2019-07-13 | From grid-connected photovoltaic energy-storage system and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910632572.4A CN110445169A (en) | 2019-07-13 | 2019-07-13 | From grid-connected photovoltaic energy-storage system and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110445169A true CN110445169A (en) | 2019-11-12 |
Family
ID=68430429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910632572.4A Pending CN110445169A (en) | 2019-07-13 | 2019-07-13 | From grid-connected photovoltaic energy-storage system and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110445169A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111245021A (en) * | 2020-03-19 | 2020-06-05 | 阳光电源股份有限公司 | Grid-connected and off-grid hybrid inverter |
| CN112736967A (en) * | 2020-12-22 | 2021-04-30 | 河北电立方新能源科技有限公司 | Static generator |
| CN112952910A (en) * | 2021-04-23 | 2021-06-11 | 西安领充创享新能源科技有限公司 | Optical storage off-network system control method, device, controller and storage medium |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202309098U (en) * | 2011-07-01 | 2012-07-04 | 中国电子科技集团公司第三十六研究所 | Communication monitor module of photovoltaic generating grid-connected inverter system |
| CN202513587U (en) * | 2012-03-02 | 2012-10-31 | 阳光电源股份有限公司 | Grid-connected inverter power supply and countercurrent prevention system |
| CN103138637A (en) * | 2011-11-28 | 2013-06-05 | 北汽福田汽车股份有限公司 | Hybrid power supply system for photovoltaic off network, photovoltaic combined network, city network and energy storage |
| CN103746405A (en) * | 2014-02-06 | 2014-04-23 | 云南万富行节能有限公司 | Photovoltaic off-grid/grid-connection integrated control system |
| CN104052082A (en) * | 2014-06-25 | 2014-09-17 | 国家电网公司 | Off-grid and grid-connected operation light and storage joint power supply system |
| CN105552952A (en) * | 2015-12-10 | 2016-05-04 | 国网上海市电力公司 | Photovoltaic-energy storage hybrid power generation system and energy management method therefor |
| CN205724930U (en) * | 2016-04-22 | 2016-11-23 | 深圳中电长城能源有限公司 | A kind of mixing inverter system |
| CN205960666U (en) * | 2016-08-15 | 2017-02-15 | 上海发电设备成套设计研究院 | From complementary power generation system of one -piece type scene that is incorporated into power networks |
| CN206226030U (en) * | 2016-11-16 | 2017-06-06 | 宁波拜特测控技术股份有限公司 | A kind of LAN energy-storage system |
| CN108039732A (en) * | 2017-12-29 | 2018-05-15 | 南京熊猫电子股份有限公司 | A kind of and the one-piece type photovoltaic energy-storage system power supply of off-network and its control method |
| CN108063455A (en) * | 2017-12-11 | 2018-05-22 | 江苏辉伦太阳能科技有限公司 | One kind is from grid-connected photovoltaic energy storage inverter Poewr control method |
-
2019
- 2019-07-13 CN CN201910632572.4A patent/CN110445169A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202309098U (en) * | 2011-07-01 | 2012-07-04 | 中国电子科技集团公司第三十六研究所 | Communication monitor module of photovoltaic generating grid-connected inverter system |
| CN103138637A (en) * | 2011-11-28 | 2013-06-05 | 北汽福田汽车股份有限公司 | Hybrid power supply system for photovoltaic off network, photovoltaic combined network, city network and energy storage |
| CN202513587U (en) * | 2012-03-02 | 2012-10-31 | 阳光电源股份有限公司 | Grid-connected inverter power supply and countercurrent prevention system |
| CN103746405A (en) * | 2014-02-06 | 2014-04-23 | 云南万富行节能有限公司 | Photovoltaic off-grid/grid-connection integrated control system |
| CN104052082A (en) * | 2014-06-25 | 2014-09-17 | 国家电网公司 | Off-grid and grid-connected operation light and storage joint power supply system |
| CN105552952A (en) * | 2015-12-10 | 2016-05-04 | 国网上海市电力公司 | Photovoltaic-energy storage hybrid power generation system and energy management method therefor |
| CN205724930U (en) * | 2016-04-22 | 2016-11-23 | 深圳中电长城能源有限公司 | A kind of mixing inverter system |
| CN205960666U (en) * | 2016-08-15 | 2017-02-15 | 上海发电设备成套设计研究院 | From complementary power generation system of one -piece type scene that is incorporated into power networks |
| CN206226030U (en) * | 2016-11-16 | 2017-06-06 | 宁波拜特测控技术股份有限公司 | A kind of LAN energy-storage system |
| CN108063455A (en) * | 2017-12-11 | 2018-05-22 | 江苏辉伦太阳能科技有限公司 | One kind is from grid-connected photovoltaic energy storage inverter Poewr control method |
| CN108039732A (en) * | 2017-12-29 | 2018-05-15 | 南京熊猫电子股份有限公司 | A kind of and the one-piece type photovoltaic energy-storage system power supply of off-network and its control method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111245021A (en) * | 2020-03-19 | 2020-06-05 | 阳光电源股份有限公司 | Grid-connected and off-grid hybrid inverter |
| CN112736967A (en) * | 2020-12-22 | 2021-04-30 | 河北电立方新能源科技有限公司 | Static generator |
| CN112952910A (en) * | 2021-04-23 | 2021-06-11 | 西安领充创享新能源科技有限公司 | Optical storage off-network system control method, device, controller and storage medium |
| WO2022222529A1 (en) * | 2021-04-23 | 2022-10-27 | 西安领充创享新能源科技有限公司 | Method and apparatus for controlling optical storage off-grid system, controller and storage medium |
| CN112952910B (en) * | 2021-04-23 | 2023-10-24 | 西安领充创享新能源科技有限公司 | Optical storage off-grid system control method, device, controller and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110445169A (en) | From grid-connected photovoltaic energy-storage system and its control method | |
| CN106160161B (en) | A kind of solar energy power source apparatus and control method | |
| CN203690977U (en) | Solar charging control system | |
| JPH11127546A (en) | Photovoltaic power generating system | |
| CN103928697A (en) | Flow battery system with emergency reserve power supply function | |
| CN109768561A (en) | Electric vehicle control method and system | |
| CN102709977A (en) | Solar power generation system controller with alternating current detection control unit | |
| JP2005237121A (en) | Solar power generation system with power storage function | |
| CN107128184A (en) | Fuel cell and energy-storage battery hybrid electric vehicle control method and car system | |
| CN103683467B (en) | A kind of independent photovoltaic electric power system with self-starting function | |
| CN209963766U (en) | Microgrid optical storage and charging energy control device sharing direct current bus | |
| CN107612007B (en) | Direct-current undervoltage protection method for energy storage converter in light storage independent micro-grid | |
| CN2706939Y (en) | Intelligent solar charging controller | |
| CN104617782B (en) | Anti-surging current device, Anti-surging current methods and household electrical appliance | |
| CN104300605B (en) | Power circuit and control method thereof | |
| JP3578911B2 (en) | Portable solar power generator | |
| CN201406245Y (en) | Solar elevator | |
| CN207124475U (en) | Energy-storage system | |
| CN206977128U (en) | The battery protection system of new energy | |
| CN207698953U (en) | A kind of zero standby elevator emergency rescue start-up circuit | |
| TWI686564B (en) | Hybrid green-energy street light apparatus | |
| CN202395475U (en) | Lithium ion battery charge/discharge monitoring control device | |
| JP2003092831A (en) | Power supply system and its operation method | |
| CN201409098Y (en) | Elevator power supply | |
| CN106953404A (en) | A kind of regular charge-discharge system of emergency power supply battery and its method |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191112 |
|
| RJ01 | Rejection of invention patent application after publication |