CN105205218B - A kind of modularization energy-storage system extensive diagnostic method based on Complex Networks Theory - Google Patents
A kind of modularization energy-storage system extensive diagnostic method based on Complex Networks Theory Download PDFInfo
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Abstract
The present invention provides a kind of modularization energy-storage system extensive diagnostic method based on Complex Networks Theory, for the topological structure of modularization energy-storage system, node object in modularization energy-storage system being abstracted as in complex network, interaction between object is abstracted as the company side between network node, using two subnetwork model building module energy-storage system network models, the physical significance of the network model is clear, is easy to engineering staff's operation and realizes；For under total monomer battery node quantity amplification condition, is doubled by the series connection of series mould set and extended, voltage/power/capacitance grade of expansion module energy-storage system；And the multiplication extension in parallel of gang mould group, two kinds of mode of extensions of current/power/capacitance grade of expansion module energy-storage system, using expansion evaluation index can effective discovery module energy-storage system structure propagation law, disclosing influences modularization energy-storage system structure extension.
Description
Technical field
The invention belongs to electric system energy-storage battery technical fields, and in particular to a kind of module based on Complex Networks Theory
Change energy-storage system extensive diagnostic method.
Background technique
Energy storage technology is one of the key technology for improving imbalance between power supply and demand and realizing energy sustainable development.All kinds of electrifications
Learning battery energy storage technology is the modularization energy storage system that meets actual demand and must be composed in series and parallel using several battery modules
System.The structure of modularization energy-storage system includes: basic constitution element (the battery cell connection mutual with it), basic element group
At branch of a network (series-parallel branch), the sub-network (minimal network unit for meeting actual requirement) and more that constitutes of multilayer branch
The energy-storage system (the multiple sub-network systems for meeting workload demand) that a sub-network is constituted.Composition in modularization energy-storage system
When the stable linear increase of unit (battery cell) quantity, the relationship (series-parallel scheme) between component units is but in accelerated growth
The complexity of trend, system extension increases therewith.
Complex Networks Theory is used to study the system by various mechanism controls and dynamic change.Use for reference modularization energy-storage system
The design experiences of real example and the theoretical research result of systematic science construct modularization energy-storage system network extended model, using again
Miscellaneous network essential characteristic parameter and modularization energy-storage system evaluation index are connected for how to increase battery cell quantity and adjustment
How mode combines with actual demand and condition and realizes that the extension of extensive modularization energy-storage system is analyzed and evaluated,
To realize that modularization energy-storage system optimization design has important practical significance.
The existing complication system network structure extensive diagnostic based on Complex Networks Theory is not apparent from evaluation method to be related to
Carry out modularization energy-storage system network knot to by the building of modularization energy-storage system network model, extended mode and evaluation index etc.
Structure extensive diagnostic and evaluation.
Summary of the invention
In order to which simple, accurate progress modularization energy-storage system network structure is expanded with battery node quantity and is extended
Analysis, the present invention provides a kind of modularization energy-storage system extensive diagnostic method based on Complex Networks Theory, obtains modularization
Energy-storage system single battery quantity and topological structure, and use two subnetwork model construction module energy-storage system network models；
The expansion evaluation index for calculating the modularization energy-storage system under different mode of extensions, finally according to expansion evaluation index to modularization
Energy-storage system is extended analysis.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme that:
The present invention provides a kind of modularization energy-storage system extensive diagnostic method based on Complex Networks Theory, the method packet
Include following steps:
Step 1: obtaining modularization energy-storage system single battery quantity and topological structure；
Step 2: using two subnetwork model construction module energy-storage system network models；
Step 3: analysis is extended to modularization energy-storage system according to expansion evaluation index.
In the step 2, the node type in modularization energy-storage system network model includes single battery node and monomer
The connection relationship of tie point node between battery, single battery node is respectively connected to adjacent company as even side, single battery node
Contact node, there is no even sides between similar node；Single battery node and tie point node are sequentially connected composition series mould set, even
While the more than two single battery nodes for being respectively connected to adjacent tie point node constitute and gang mould group, series mould set and and gang mould group
Through parallel/serial composition modularization energy-storage system network model.
Under total monomer battery node quantity amplification condition, mode of extension includes the first mode of extension and the second expanded mode
Formula；
First mode of extension refers to the series connection multiplication extension by series mould set, the electricity of expansion module energy-storage system
Pressure/power/capacitance grade；
Second mode of extension refers to the multiplication extension in parallel by simultaneously gang mould group, the electricity of expansion module energy-storage system
Stream/power/capacitance grade.
The step 3 the following steps are included:
Step 3-1: the expansion evaluation index of the modularization energy-storage system under different mode of extensions is calculated；
Step 3-2: analysis is extended to modularization energy-storage system according to expansion evaluation index.
In the step 3-1, under the first mode of extension, the expansion evaluation index of modularization energy-storage system is series-parallel knot
The structure coefficient of coup, series and parallel structure coefficient of coup ηSPIt indicates, has:
Wherein, NSPIndicate the summation of series and parallel structure interior joint degree, the corresponding Global-Coupling of N representation module energy-storage system
The summation of nodes degree；
For the first series mould set in series of m single battery, the series and parallel structure of n series mould set parallel connection later, string
The summation N of parallel-connection structure interior joint degreeSPIt indicates are as follows:
NSP=n (m-1)+n (n-1) (3)
The summation N of the corresponding Global-Coupling nodes degree of modularization energy-storage system is indicated are as follows:
In the step 3-2, under the second mode of extension, the expansion evaluation index of modularization energy-storage system is simultaneously tandem junction
The structure coefficient of coup, and cascaded structure coefficient of coup ηPSIt indicates, has:
Wherein, NPSIndicate the summation of simultaneously cascaded structure interior joint degree；
It is first in parallel for n single battery to constitute and gang mould group, m and gang mould group is concatenated and cascaded structure later, and
The summation N of cascaded structure interior joint degreePSIt indicates are as follows:
Compared with prior art, the beneficial effects of the present invention are:
The present invention is directed to the topological structure of modularization energy-storage system, the object in modularization energy-storage system is abstracted as multiple
Node in miscellaneous network, the interaction between object is abstracted as the company side between network node, using two subnetwork model foundation moulds
Block energy-storage system network model, the physical significance of the network model is clear, is easy to engineering staff's operation and realizes；
For under total monomer battery node quantity amplification condition, is doubled by the series connection of series mould set and extended, expanded mode
Voltage/power/capacitance grade of block energy-storage system；And the multiplication extension in parallel of gang mould group, expansion module energy-storage system
Two kinds of mode of extensions of current/power/capacitance grade, can effective discovery module energy-storage system structure using expansion evaluation index
Propagation law, disclose influence modularization energy-storage system structure extension.
Detailed description of the invention
Fig. 1 is the modularization energy-storage system extensive diagnostic method flow in the embodiment of the present invention based on Complex Networks Theory
Figure；
Fig. 2 is the distribution map of the series and parallel structure coefficient of coup in the embodiment of the present invention；
Fig. 3 be in the embodiment of the present invention and the cascaded structure coefficient of coup distribution map.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The present invention provides a kind of modularization energy-storage system extensive diagnostic method based on Complex Networks Theory, the method packet
Include following steps:
Step 1: obtaining modularization energy-storage system single battery quantity and topological structure；
Step 2: using two subnetwork model construction module energy-storage system network models；
Step 3: analysis is extended to modularization energy-storage system according to expansion evaluation index.
In the step 2, the node type in modularization energy-storage system network model includes single battery node and monomer
The connection relationship of tie point node between battery, single battery node is respectively connected to adjacent company as even side, single battery node
Contact node, there is no even sides between similar node；Single battery node and tie point node are sequentially connected composition series mould set, even
While the more than two single battery nodes for being respectively connected to adjacent tie point node constitute and gang mould group, series mould set and and gang mould group
Through parallel/serial composition modularization energy-storage system network model.
Under total monomer battery node quantity amplification condition, mode of extension includes the first mode of extension and the second expanded mode
Formula；
First mode of extension refers to the series connection multiplication extension by series mould set, the electricity of expansion module energy-storage system
Pressure/power/capacitance grade；
Second mode of extension refers to the multiplication extension in parallel by simultaneously gang mould group, the electricity of expansion module energy-storage system
Stream/power/capacitance grade.
The step 3 the following steps are included:
Step 3-1: the expansion evaluation index of the modularization energy-storage system under different mode of extensions is calculated；
Step 3-2: analysis is extended to modularization energy-storage system according to expansion evaluation index.
In the step 3-1, under the first mode of extension, the expansion evaluation index of modularization energy-storage system is series-parallel knot
The structure coefficient of coup, series and parallel structure coefficient of coup ηSPIt indicates, has:
Wherein, NSPIndicate the summation of series and parallel structure interior joint degree, the corresponding Global-Coupling of N representation module energy-storage system
The summation of nodes degree；
For the first series mould set in series of m single battery, the series and parallel structure of n series mould set parallel connection later, string
The summation N of parallel-connection structure interior joint degreeSPIt indicates are as follows:
NSP=n (m-1)+n (n-1) (3)
The summation N of the corresponding Global-Coupling nodes degree of modularization energy-storage system is indicated are as follows:
In the step 3-2, under the second mode of extension, the expansion evaluation index of modularization energy-storage system is simultaneously tandem junction
The structure coefficient of coup, and cascaded structure coefficient of coup ηPSIt indicates, has:
Wherein, NPSIndicate the summation of simultaneously cascaded structure interior joint degree；
It is first in parallel for n single battery to constitute and gang mould group, m and gang mould group is concatenated and cascaded structure later, and
The summation N of cascaded structure interior joint degreePSIt indicates are as follows:
Embodiment
Using y=2x, x=2,3~10 modes are extended the quantity y of single battery node, and building mSnP is series-parallel
With the topological structure of nPmS and series system.By taking 512 battery nodes as an example:
MSnP series-parallel system: 512S1P, 256S2P, 128S4P ... 4S128P, 2S256P；
NPmS and series system: 512P1S, 256P2S, 128P4S ... 4P128S, 2P256S；
Calculate y=2x, the series and parallel structure coefficient of coup η of the totally 9 groups of battery node overall network structures of x=2,3~10SPWith
And cascaded structure coefficient of coup ηPS。
Using the series and parallel structure coefficient of coup η of the network structure of mSnP series-parallel systemSPWith modularization energy-storage system phase
The distribution map of the summation for the Global-Coupling nodes degree answered, (log-log graph of log2) as shown in Figure 2.With number of nodes
Multiplication, the summation N of the corresponding Global-Coupling nodes degree of modularization energy-storage system are in power function N~f (y2) trend increase:
For example, when y increases to 1024 by 4, the corresponding Global-Coupling network of the modularization energy-storage system that each order of magnitude node is constituted
The summation N of interior joint degree increases to 523776 by 12.Based on quantity n in parallel, i.e. the current class of system is constant, increases
Add serial number m, realizes extension of the network structure of (m × n) a node in voltage class.With the increase of serial number m,
Series and parallel structure coefficient of coup ηSPPower function η is presentedSP~f (y-1) attenuation trend；Based on serial number m, i.e. the electricity of system
It presses grade constant, increases quantity n in parallel, realize extension of the network structure of (m × n) a node on current class.With simultaneously
Join the increase (when n < m) of quantity n, series and parallel structure coefficient of coup ηSPPower function η is presentedSP~f (y-1) attenuation trend.It can from above
See, in the network structure constituted using mSnP series-parallel system, with the increasing of number of nodes (power/capacity of energy-storage system)
Add, in n < m, the increase of coupled relation and the increase of number of nodes increase in a linear relationship between battery node.
Using nPmS and the network structure of series system and cascaded structure coefficient of coup ηPSDistribution map, as shown in Figure 3
(log-log graph of log2).From the figure 3, it may be seen that the current class of i.e. system is constant based on quantity n in parallel, increase series-connected stage
Number m realize the extension of the network structure in voltage class of (m × n) a node, with the increase of serial number m, and tandem junction
Structure coefficient of coup ηPSPower function η is presentedPS~f (y-1) attenuation trend；When using based on serial number m, i.e. modularization energy storage system
The voltage class of system is constant, increases quantity n in parallel, realizes extension of the network structure of (m × n) a node on current class,
With the increase of quantity n in parallel, and cascaded structure coefficient of coup ηPSThough having no significant changes, the quantity of its coupled relation is exhausted
Power function f (y is presented to value2) trend increase.Therefore using nPmS and in network structure that series system is constituted, with
The increase of number of nodes (power/capacity of energy-storage system), the increase of coupling influence factor and node between series-connected cell node
The increase of quantity increase in a linear relationship, the variation of coupled relation and the increase of number of nodes y are in 2 power between batteries in parallel connection node
Functional relation.
The interpretation of result of above steps shows that the method for the present invention effectively can carry out network knot to modularization energy-storage system
Structure extensive diagnostic expands with total battery node quantity, quantitatively gives series/parallel connection type in system structure expansion process
In shared weight, optimization design foundation can be provided for the power response of improvement modularization energy-storage system network.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field can still modify to a specific embodiment of the invention referring to above-described embodiment or
Equivalent replacement, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent replacement
Within bright claims.
Claims (1)
1. a kind of modularization energy-storage system extensive diagnostic method based on Complex Networks Theory, it is characterised in that: the method packet
Include following steps:
Step 1: obtaining modularization energy-storage system single battery quantity and topological structure；
Step 2: using two subnetwork model construction module energy-storage system network models；
Step 3: analysis is extended to modularization energy-storage system according to expansion evaluation index；
In the step 2, the node type in modularization energy-storage system network model includes single battery node and single battery
Between tie point node, the connection relationship of single battery node is respectively connected to adjacent attachment points as even side, single battery node
Node, there is no even sides between similar node；Single battery node and tie point node are sequentially connected composition series mould set, Lian Bianfen
The more than two single battery nodes for not accessing adjacent tie point node constitute and gang mould group, series mould set and and gang mould group warp
Parallel/serial composition modularization energy-storage system network model；
Under total monomer battery node quantity amplification condition, mode of extension includes the first mode of extension and the second mode of extension；
First mode of extension refers to through the series connection of series mould set multiplication extension, the voltage of expansion module energy-storage system/
Power/capacitance grade；
Second mode of extension refer to by and gang mould group multiplication extension in parallel, the electric current of expansion module energy-storage system/
Power/capacitance grade；
The step 3 the following steps are included:
Step 3-1: the expansion evaluation index of the modularization energy-storage system under different mode of extensions is calculated；
Step 3-2: analysis is extended to modularization energy-storage system according to expansion evaluation index；
In the step 3-1, under the first mode of extension, the expansion evaluation index of modularization energy-storage system is series and parallel structure coupling
Collaboration number, series and parallel structure coefficient of coup ηSPIt indicates, has:
Wherein, NSPIndicate the summation of series and parallel structure interior joint degree, the corresponding Global-Coupling network of N representation module energy-storage system
The summation of interior joint degree；
For the first series mould set in series of m single battery, the series and parallel structure of n series mould set parallel connection later, in series and parallel
The summation N of structure interior joint degreeSPIt indicates are as follows:
NSP=n (m-1)+n (n-1) (3)
The summation N of the corresponding Global-Coupling nodes degree of modularization energy-storage system is indicated are as follows:
In the step 3-2, under the second mode of extension, the expansion evaluation index of modularization energy-storage system is simultaneously cascaded structure coupling
Collaboration number, and cascaded structure coefficient of coup ηPSIt indicates, has:
Wherein, NPSIndicate the summation of simultaneously cascaded structure interior joint degree；
It is first in parallel for n single battery to constitute and gang mould group, m and gang mould group is concatenated and cascaded structure later, and connect
The summation N of structure interior joint degreePSIt indicates are as follows:
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| CN103023155A (en) * | 2011-10-15 | 2013-04-03 | 上海市电力公司 | Modular design method of large-capacity battery energy storage system |
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| A Novel Reconfigurable Microgrid Architecture With Renewable Energy Sources and Storage;Sushil S. Thale等;《IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS》;20150430;第51卷(第2期);第1805-1816页 |
| 电池储能系统的动态模型及其控制特性分析;黄丁顺等;《电气应用》;20140715;第33卷(第13期);第42-47页 |
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