CN109412184A - A kind of multiple-limb energy storage control device and method - Google Patents
A kind of multiple-limb energy storage control device and method Download PDFInfo
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- CN109412184A CN109412184A CN201811286472.2A CN201811286472A CN109412184A CN 109412184 A CN109412184 A CN 109412184A CN 201811286472 A CN201811286472 A CN 201811286472A CN 109412184 A CN109412184 A CN 109412184A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H02J3/382—
Abstract
The present invention provides a kind of multiple-limb energy storage control device and methods, are related to micro-grid system technical field.The multiple-limb energy storage control device includes bus, conversion equipment group and energy storage device group, conversion equipment group includes at least two conversion equipments, energy storage device group includes at least two energy storage devices, each conversion equipment is electrically connected with an energy storage device, each conversion equipment is electrically connected with bus, and the working condition of conversion equipment group is determined for the voltage value according to bus, preset target voltage values.The advantages of there is the more flexible energy storage for realizing dynamic realtime to configure for multiple-limb energy storage control device provided by the invention and method, and then the sufficient advantage for utilizing energy storage device, promote the service life of energy-storage system.
Description
Technical field
The present invention relates to micro-grid system technical fields, in particular to a kind of multiple-limb energy storage control device and side
Method.
Background technique
In the Distributed Renewable Energy Power System with energy-storage system, usually select battery as energy storage member
Part, while energy storage or electric discharge are carried out using multiple-limb energy storage cooperative mode.
But for current multiple-limb energy storage cooperative scheduling strategy, it cannot achieve the flexible configuration of each energy storage device.
It is the emphasis of those skilled in the art's concern in view of this, how to solve the above problems.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of multiple-limb energy storage control device, to solve in the prior art
The problem of cannot achieve the flexible configuration of each energy storage device.
Another object of the present invention is to provide a kind of multiple-limb energy storage control methods, in the prior art can not be real with solution
Now the problem of the flexible configuration of each energy storage device.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows:
On the one hand, the embodiment of the invention provides a kind of multiple-limb energy storage control device, the multiple-limb energy storage control dresses
It sets including bus, conversion equipment group and energy storage device group, the conversion equipment group includes at least two conversion equipments, the energy storage
Equipment group includes at least two energy storage devices, and each conversion equipment is electrically connected with an energy storage device, Mei Gesuo
It states conversion equipment to be electrically connected with the bus, and is determined for the voltage value according to the bus, preset target voltage values
The working condition of the conversion equipment group.
Further, each conversion equipment be used for according to the bus voltage value and preset target voltage values it
Between difference and the fiducial value that is determined according to the preset target voltage values be compared, to determine the first flag bit, often
A conversion equipment is also used to determine the working condition of the conversion equipment group according to the value of first flag bit.
Further, it is communicated to connect between at least two conversion equipment, each conversion equipment is for obtaining it
The address of its conversion equipment, each conversion equipment are also used to when the value of first flag bit is the first preset value, according to
The second flag bit is determined according to the address and the address of itself of other conversion equipments, and the value according to second flag bit is true
Determine operating mode.
Further, the operating mode includes the first operating mode and the second operating mode, each conversion equipment
It is also used to when second flag bit is the first preset value, determines that the operating mode is the first operating mode, when described the
When two flag bits are the second preset value, determine that the operating mode is the second operating mode.
Further, the multiple-limb energy storage control device includes the second bus and controller, each conversion equipment
It is connect with second bus communication, second bus is also communicated to connect with the controller, when determining the Working mould
When formula is the second operating mode, the controller is used to obtain the residual energy of each energy storage device by the conversion equipment
The realtime power of amount, remaining gross energy and the bus, and set according to each transformation of formula Pref_N=W_N*Po/W distribution
Standby given power, to input with controlling each energy storage device equal proportion or output power, wherein Pref_N indicates N
The given power of a conversion equipment, W_N indicate the dump energy of n-th energy storage device, and Po indicates the realtime power of bus, W table
Show remaining gross energy.
Further, each conversion equipment is also used to when the value of first flag bit is the second preset value, really
Determining operating mode is the first operating mode.
Further, the multiple-limb energy storage control device include the first bus, at least two conversion equipment with
The first bus communication connection, so that each conversion equipment obtains the address of other conversion equipments.
On the other hand, the embodiment of the invention also provides a kind of multiple-limb energy storage control methods, are applied to multiple-limb energy storage
Control device, the multiple-limb energy storage control device include bus, conversion equipment group and energy storage device group, the conversion equipment group
Including at least two conversion equipments, the energy storage device group include at least two energy storage devices, each conversion equipment with
One energy storage device electrical connection, each conversion equipment are electrically connected with the bus, the multiple-limb energy storage control
Method includes:
Each conversion equipment obtain the bus voltage value and preset target voltage values, and according to the bus
Voltage value, preset target voltage values determine the working condition of the conversion equipment group.
Further, each conversion equipment is according between the voltage value and preset target voltage values of the bus
Difference and the fiducial value determined according to the preset target voltage values are compared, and determine the first flag bit, while according to
The working condition of the conversion equipment group is determined according to the value of first flag bit；The multiple-limb energy storage control method also wraps
It includes:
Each conversion equipment when the value of first flag bit is the second preset value, is determining that operating mode is the
One operating mode；
When the value of first flag bit is the first preset value, each conversion equipment is according to other conversion equipments
Address and the address of itself determine the second flag bit, and the value according to second flag bit determines operating mode.
Further, the operating mode further includes the second operating mode, and the multiple-limb energy storage control device includes the
Two lines bus and controller, each conversion equipment are connect with second bus communication, second bus also with it is described
Controller communication connection, when second flag bit is the second preset value, when determining that the operating mode is the second operating mode,
The multiple-limb energy storage control method further include:
The controller obtains the dump energy of each energy storage device by the conversion equipment；
The controller distributes the given power of each conversion equipment according to formula Pref_N=W_N*Po/W, every to control
It inputting to a energy storage device equal proportion or output power, wherein Pref_N indicates the given power of n-th conversion equipment,
W_N indicates the dump energy of n-th energy storage device, and Po indicates that the realtime power of bus, W indicate remaining gross energy.
Compared with the prior art, the invention has the following advantages:
The present invention provides a kind of multiple-limb energy storage control device and method, which includes mother
Line, conversion equipment group and energy storage device group, conversion equipment group include at least two conversion equipments, and energy storage device group includes at least two
A energy storage device, each conversion equipment are electrically connected with an energy storage device, and each conversion equipment is electrically connected with bus, is used in combination
The working condition of conversion equipment group is determined in the voltage value according to bus, preset target voltage values.Since conversion equipment can
The working condition that conversion equipment group is determined according to the voltage value of bus and preset target voltage values, by different working condition
Under operation so that can be realized between each energy storage device dynamic realtime more flexible energy storage configuration, and then adequately
Using the advantage of energy storage device, the service life of energy-storage system is promoted.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the module diagram of the multiple-limb energy storage control device of the embodiment of the present invention offer.
Fig. 2 shows the first flag bits of the multiple-limb energy storage control device of the embodiment of the present invention offer to judge regulation
Figure.
The second flag bit that Fig. 3 shows the multiple-limb energy storage control device of the embodiment of the present invention offer judges regulation
Figure.
Fig. 4 shows the networking schematic diagram of the multiple-limb energy storage control device of the embodiment of the present invention offer.
Fig. 5 shows the flow chart of the multiple-limb energy storage control method of the embodiment of the present invention offer.
Icon: 100- multiple-limb energy storage control device；110- bus；120- conversion equipment group；121- conversion equipment；130-
Energy storage device group；131- energy storage device；The first bus of 140-；150- controller；The second bus of 160-.
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 scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile of the invention
In description, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " connected ", " connection " shall be understood in a broad sense,
It for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connection, be also possible to electricity
Connection；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary.For
For those skilled in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.It ties below
Attached drawing is closed, is elaborated to some embodiments of the present invention.In the absence of conflict, following embodiment and embodiment
In feature can be combined with each other.
First embodiment
Referring to Fig. 1, the embodiment of the invention provides a kind of multiple-limb energy storage control device 100, the multiple-limb energy storage control
Device 100 processed includes bus 110, conversion equipment group 120 and energy storage device group 130, and conversion equipment group 120 includes at least two changes
Exchange device 121, energy storage device group 130 include at least two energy storage devices 131, and each conversion equipment 121 is set with an energy storage
Standby 131 electrical connection, each conversion equipment 121 is electrically connected with bus 110, to construct entire energy-storage system.
It should be noted that in the present embodiment, the elements such as including battery of energy storage device 131, conversion equipment 121 includes
In some other embodiments, other elements or equipment can also be used as energy storage of course in the equipment such as dcdc converter
Equipment 131 and conversion equipment 121, the present embodiment do not do any restriction to this.
Meanwhile in the present embodiment, a dcdc converter is connect with a battery, while dcdc converter bus
110 electrical connections a, so that branch of the energy-storage system is formed, and the branch of the energy-storage system is greater than or equal to two, with reality
The distribution of existing charge and discharge.
Since in practical applications, the capacity and remaining capacity of each energy storage device 131 may be different, therefore for reality
Existing more flexible energy storage configuration, and then the advantage of energy storage device 131 is adequately utilized, the service life of energy-storage system is promoted,
Present embodiments provide a kind of new multiple-limb energy storage control device 100.
Specifically, conversion equipment 121 can be used in the voltage value according to bus 110, preset target voltage values determine and become
The working condition of exchange device group 120.Wherein, working condition described in the present embodiment includes one master and multiple slaves working condition and leads more
Machine operating status, wherein one master and multiple slaves working condition refers in all conversion equipments 121, by one of conversion equipment 121
As host, using remaining variation device as slave；And more operational state of mainframe indicate all conversion equipments 121 as master
Machine is run simultaneously.
In the present embodiment, in order to determine the working condition of conversion equipment group 120, each conversion equipment 121 is used for foundation
Difference and the ratio determining according to preset target voltage values between the voltage value of bus 110 and preset target voltage values
It is compared compared with value, to determine that the first flag bit, each conversion equipment 121 are also used to determine transformation according to the value of the first flag bit
The working condition of equipment group 120.
For example, referring to Fig. 2, conversion equipment 121 obtain bus 110 voltage value after, by the voltage value of bus 110 with
The target voltage values of pre-stored bus 110 do difference, so as to calculate the voltage value and preset target electricity of bus 110
Difference between pressure value, meanwhile, which can also be compared by conversion equipment 121 with fiducial value, to determine the first flag bit
Value, wherein Udc_ref indicate target voltage values, Udc be bus 110 voltage value, Δ Udc indicate fiducial value, 0.05Udc_
Ref indicates fiducial value, it is possible to understand that, fiducial value is determined by presetting target voltage values, in the present embodiment, fiducial value etc.
In 0.05* target voltage values, of course, fiducial value may be other numerical value, the present embodiment pair in some other embodiments
This does not do any restriction.Wherein, when the absolute value of difference is greater than or equal to fiducial value, the first flag bit value is 1, is on duty
When the absolute value of value is less than fiducial value, the value that the first mark is is 0.
It is also desirable to explanation, is provided with the first preset value and the second preset value in conversion equipment 121, wherein the
One preset value is 1, and the second preset value is 0, of course, in some other embodiments, the first preset value and the second preset value
It can also be defined as other values, it is only necessary to be matched with the first flag bit.Meanwhile it being preset when the first flag bit is equal to first
When value, then the working condition of conversion equipment group 120 is one master and multiple slaves working condition, and when the first flag bit is equal to the second preset value
When, the working condition of the conversion equipment group 120 is that more hosts run working condition.Also, conversion equipment group 120 is being determined
After working condition, operating mode can be determined according to the working condition.
In the present embodiment, operating mode includes the first operating mode and the second operating mode, wherein the first operating mode
Refer to constant power mode, the second operating mode refers to constant voltage mode, also, constant power mode refers to that energy storage device 131 is charging and putting
In electric process, charge and discharge are carried out according to fixed power, and constant voltage mode refers to energy storage device 131 in charge and discharge process
In, charge and discharge are carried out according to constant voltage.When conversion equipment 121 the value for determining the first flag bit be the second preset value when,
I.e. working condition is more operational state of mainframe, and the operating mode that each conversion equipment 121 determines is the first operating mode, i.e.,
For constant power mode.
When the working condition for determining conversion equipment group 120 be one master and multiple slaves working condition when, it is thus necessary to determine that host with from
Machine, also, in order to realize the effect flowed, host work mode need to be set as the second operating mode, and the operating mode of slave
It need to be set as the first operating mode.
Specifically, the present embodiment determines the operating mode of conversion equipment 121 by way of calculating the second flag bit,
In, when the value of the first flag bit is the first preset value, the is determined according to the address of other conversion equipments 121 and address itself
Two flag bits, and the value according to the second flag bit determines operating mode.
In the present embodiment, it being communicated to connect between conversion equipment 121, each conversion equipment 121 is provided with address, and
Each conversion equipment 121 can obtain the address of other conversion equipments 121, and each conversion equipment 121 is by judging that address is realized
The determination of second flag bit.
Specifically, in the present embodiment, multiple-limb energy storage control device 100 includes the first bus 140, each conversion equipment
121 communicate to connect with the first bus 140, so that each conversion equipment 121 obtains the address of other conversion equipments 121.Wherein,
First bus 140 described in the present embodiment includes CAN bus.
For the method for determination of the second flag bit are as follows:
Referring to Fig. 3, conversion equipment 121 realizes each equipment by CAN bus and machine Address Recognition, and save it is minimum simultaneously
Machine address N_min, then each dcdc converter be arranged according to itself and machine address N, with current minimum and machine address N_min
It is compared, as N=N_min, dcdc converter returns to the second flag bit S2=0, and the second flag bit is second default at this time
When value, determine that operating mode is the second operating mode, i.e. constant voltage mode, which is host；And work as N > N_min
When, dcdc converter returns to operating mode flag bit S2=1, i.e., corresponding conversion equipment 121 is slave, determines that operating mode is
First operating mode, i.e. constant power mode.
I.e. in the present embodiment, it regard the smallest conversion equipment 121 in address as host, and other conversion equipments 121 is made
For slave.
Further, in order to realize during charge or discharge, multiple-limb energy storage control device 100 be can be realized
The carry out charge and discharge of ratio, to extend in multiple-limb storage device the service life for respectively storing equipment, referring to Fig. 4, the present embodiment mentions
The multiple-limb energy storage control device 100 of confession includes the second bus 160 and controller 150, and each conversion equipment 121 is total with second
Line 160 communicates to connect, and the second bus 160 is also communicated to connect with controller 150, wherein the second bus 160 provided in this embodiment
Including but not limited to 485 buses.
Meanwhile the address of conversion equipment 121 described in the present embodiment be controller 150 be arranged to conversion equipment 121 and
Machine address, and controller 150 includes but is not limited to MGC (Microgrid Controller, piconet controller).Controller 150
The real-time of the dump energy of each energy storage device 131, remaining gross energy and bus 110 can be obtained by conversion equipment 121
Power, also, when operating mode is the second operating mode, in order to realize that constant voltage mode carries out charge and discharge, 150 meeting of controller
The given power of each conversion equipment 121 is distributed, according to formula Pref_N=W_N*Po/W to control each energy storage device 131 etc.
It inputs to ratio or output power, wherein Pref_N indicates that the given power of n-th conversion equipment 121, W_N indicate n-th storage
The dump energy of energy equipment 131, Po indicate that the realtime power of bus 110, W indicate remaining gross energy.
It should be noted that equal proportion described in the present embodiment, refers to the charge and discharge interior between unit of each conversion equipment 121
The energy storage total value that the value of electricity accounts for the conversion equipment 121 is equal.
By the association of multiple-limb energy storage from management, reaches and maintain the longest purpose of 110 voltage settling time of DC bus；Both
100 charge and discharge electricity operation control strategy of multiple-limb energy storage control device may be implemented, and each conversion equipment 121 may be implemented and coordinate control
The stable purpose of DC bus 110 processed.
Second embodiment
Referring to Fig. 5, being applied to first embodiment the embodiment of the invention also provides a kind of multiple-limb energy storage control method
The multiple-limb energy storage control device 100, the multiple-limb energy storage control device 100 include bus 110, conversion equipment group 120
With energy storage device group 130, conversion equipment group 120 includes at least two conversion equipments 121, and energy storage device group 130 includes at least two
A energy storage device 131, each conversion equipment 121 are electrically connected with an energy storage device 131, each conversion equipment 121 with mother
Line 110 is electrically connected, which includes:
Step S101, the voltage value of each acquisition of conversion equipment 121 bus 110 and preset target voltage values, and foundation
The voltage value of bus 110, preset target voltage values determine the working condition of conversion equipment group 120.
Wherein, step S101 includes:
Sub-step S1011, according to the difference and foundation between the voltage value and preset target voltage values of bus 110
The fiducial value that preset target voltage values determine is compared, to determine the first flag bit.
Sub-step S1012 judges whether the first flag bit is the second preset value, if it is, sub-step S1013 is executed,
If it is not, then executing sub-step S1014.
Step S1013 determines that working condition is the first working condition.
In the present embodiment, when each conversion equipment 121 when the value of the first flag bit be the second preset value when, determine work
Operation mode is the first operating mode.That is the first working condition is more operational state of mainframe, can directly determine conversion equipment 121
Operating mode is invariable power operating mode.
Sub-step S1014 determines that working condition is the second working condition.
Step S102 calculates the value of the second flag bit of each conversion equipment 121.
When the value of the first flag bit is the first preset value, ground of each conversion equipment 121 according to other conversion equipments 121
Location and the address of itself determine the second flag bit, and the value according to the second flag bit determines operating mode.
Step S103 judges whether the value of the second flag bit is the second preset value, if not, thening follow the steps S104, such as
Fruit is to then follow the steps S105.
Step S104 determines that above-mentioned operating mode is the first operating mode.
Step S105 determines that above-mentioned operating mode is the second operating mode.
Step S106, controller 150 obtain the dump energy of each energy storage device 131 by conversion equipment 121.
In the present embodiment, multiple-limb energy storage control device 100 includes controller and the second bus, and each conversion equipment
121 connect with the second bus communication, and controller is also connect with the second bus communication, when determine operating mode be the second Working mould
When formula, in order to realize that constant voltage mode carries out charge and discharge, controller can obtain the dump energy of each energy storage device 131, simultaneously
The remaining gross energy of all energy storage devices 131 and the realtime power of bus 110 can also be obtained.
Step S107, dump energy distribution of the controller 150 according to the realtime power, each energy storage device 131 of bus 110
The given power of each conversion equipment 121, to input with controlling each 131 equal proportion of energy storage device or output power.
In the present embodiment, controller distributes the given function of each conversion equipment according to formula Pref_N=W_N*Po/W
Rate, to input with controlling each energy storage device equal proportion or output power, wherein Pref_N indicates giving for n-th conversion equipment
Determine power, W_N indicates the dump energy of n-th energy storage device, and Po indicates that the realtime power of bus, W indicate remaining gross energy.
In conclusion the present invention provides a kind of multiple-limb energy storage control device and method, multiple-limb energy storage control dress
It sets including bus, conversion equipment group and energy storage device group, conversion equipment group includes at least two conversion equipments, energy storage device group packet
At least two energy storage devices are included, each conversion equipment is electrically connected with an energy storage device, and each conversion equipment is electric with bus
Connection, and the voltage value for foundation bus, preset target voltage values determine the working condition of conversion equipment group.Due to transformation
Equipment can determine the working condition of conversion equipment group according to the voltage value of bus and preset target voltage values, by difference
Operation under working condition, so that can be realized the more flexible energy storage configuration of dynamic realtime between each energy storage device, into
And the advantage of energy storage device is adequately utilized, promote the service life of energy-storage system.
It should be noted that, in this document, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
Claims (10)
1. a kind of multiple-limb energy storage control device, which is characterized in that the multiple-limb energy storage control device include bus, transformation set
Standby group and energy storage device group, the conversion equipment group include at least two conversion equipments, and the energy storage device group includes at least two
A energy storage device, each conversion equipment are electrically connected with an energy storage device, and each conversion equipment is and institute
Bus electrical connection is stated, and for determining the conversion equipment group according to the voltage value of the bus, preset target voltage values
Working condition.
2. multiple-limb energy storage control device as described in claim 1, which is characterized in that each conversion equipment is used for foundation
It difference between the voltage value of the bus and preset target voltage values and is determined according to the preset target voltage values
Fiducial value be compared, to determine the first flag bit, each conversion equipment is also used to according to first flag bit
Value determines the working condition of the conversion equipment group.
3. multiple-limb energy storage control device as claimed in claim 2, which is characterized in that between at least two conversion equipment
Communication connection, each conversion equipment are used to obtain the address of other conversion equipments, and each conversion equipment is also used to work as
When the value of first flag bit is the first preset value, the is determined according to the address of other conversion equipments and address itself
Two flag bits, and the value according to second flag bit determines operating mode.
4. multiple-limb energy storage control device as claimed in claim 3, which is characterized in that the operating mode includes the first work
Mode and the second operating mode, each conversion equipment are also used to determine when second flag bit is the first preset value
The operating mode is the first operating mode, when second flag bit is the second preset value, determines that the operating mode is
Second operating mode.
5. multiple-limb energy storage control device as claimed in claim 4, which is characterized in that the multiple-limb energy storage control device packet
Include the second bus and controller, each conversion equipment is connect with second bus communication, second bus also with
The controller communication connection, when determining the operating mode is the second operating mode, the controller is used for by described
Conversion equipment obtains the realtime power of the dump energy of each energy storage device, remaining gross energy and the bus, and according to
The given power of each conversion equipment is distributed, according to formula Pref_N=W_N*Po/W to control each energy storage device equal proportion
Ground input or output power, wherein Pref_N indicates that the given power of n-th conversion equipment, W_N indicate n-th energy storage device
Dump energy, Po indicates that the realtime power of bus, W indicate remaining gross energy.
6. multiple-limb energy storage control device as claimed in claim 3, which is characterized in that each conversion equipment is also used to work as
When the value of first flag bit is the second preset value, determine that operating mode is the first operating mode.
7. multiple-limb energy storage control device as claimed in claim 3, which is characterized in that the multiple-limb energy storage control device packet
The first bus is included, at least two conversion equipment is connect with first bus communication, so that each conversion equipment
Obtain the address of other conversion equipments.
8. a kind of multiple-limb energy storage control method, which is characterized in that be applied to multiple-limb energy storage control device, the multiple-limb storage
Can control device includes bus, conversion equipment group and energy storage device group, and the conversion equipment group includes at least two conversion equipments,
The energy storage device group includes at least two energy storage devices, and each conversion equipment is electrically connected with an energy storage device
It connects, each conversion equipment is electrically connected with the bus, and the multiple-limb energy storage control method includes:
Each conversion equipment obtain the bus voltage value and preset target voltage values, and the electricity according to the bus
Pressure value, preset target voltage values determine the working condition of the conversion equipment group.
9. multiple-limb energy storage control method as claimed in claim 8, which is characterized in that each conversion equipment is according to described in
Difference and the ratio determining according to the preset target voltage values between the voltage value of bus and preset target voltage values
It is compared compared with value, and determines the first flag bit, while the value according to first flag bit determines the conversion equipment group
Working condition；The multiple-limb energy storage control method further include:
Each conversion equipment when the value of first flag bit is the second preset value, is determining that operating mode is the first work
Operation mode；
When the value of first flag bit is the first preset value, address of each conversion equipment according to other conversion equipments
The second flag bit is determined with the address of itself, and the value according to second flag bit determines operating mode.
10. multiple-limb energy storage control method as claimed in claim 9, which is characterized in that the operating mode further includes second
Operating mode, the multiple-limb energy storage control device include the second bus and controller, each conversion equipment with it is described
The connection of second bus communication, second bus are also communicated to connect with the controller, when second flag bit is second pre-
If value, when determining that the operating mode is the second operating mode, the multiple-limb energy storage control method further include:
The controller obtains the dump energy of each energy storage device by the conversion equipment；
The controller distributes the given power of each conversion equipment according to formula Pref_N=W_N*Po/W, to control each institute
It inputs with stating energy storage device equal proportion or output power, wherein Pref_N indicates the given power of n-th conversion equipment, W_N table
Show the dump energy of n-th energy storage device, Po indicates that the realtime power of bus, W indicate remaining gross energy.
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