CN110309565A - A kind of method and system calculating data based on tree hierarchy partition structure maintenance power grid - Google Patents
A kind of method and system calculating data based on tree hierarchy partition structure maintenance power grid Download PDFInfo
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Abstract
The invention discloses a kind of method and system that data are calculated based on tree hierarchy partition structure maintenance power grid, wherein method includes: that the supplemental characteristic of equipment component in power grid is encapsulated in plant stand, and the node in the tree-like hierarchical structure of data is calculated using the plant stand as grid simulation；The multiple ranks for determining multilayered structure in power grid hierarchical structure determine the rank of the plant stand, and carry out space orientation management to the plant stand by the multiple rank；The permission that the tree-like hierarchical structure of data determines user is calculated according to the grid simulation.
Description
Technical field
The present invention relates to electric system simulations to calculate data technique field, is based on tree hierarchy more particularly, to one kind
Partition structure safeguards that power grid calculates the method and system of data.
Background technique
Grid simulation calculates and its related case study all plays the safety of status power grid and the following power grid and economy
It is an important link of Electric Power Network Planning to related important role.China is completed worldwide largest, configuration energy at present
The strongest extra-high voltage alternating current-direct current power grid of power, the fast development of power grid need the promotion of grid simulation calculating horizontal capability.
The promotion of grid simulation computing capability needs efficiently managing and maintaining for grid simulation data.Power grid is imitative all the time
The data really needed are mainly safeguarded by the data file of simulation calculation software.Wider grid simulation software state is applied at present
Inside there are the PSD-BPA and PSASP of Chinese DianKeYuan research and development, the PSS/E that foreign countries have power technology international corporation, Siemens to research and develop.This
A little simulation softwares manage and maintain emulation data using data packet, but there are data packet versions more, decentralized problem.
Since grid simulation data maintenance main body is numerous, forms the whole network uniform data and need to expend a large amount of manpower and material resources, and guaranteeing
Consistency, raising accuracy, improving data maintenance efficiency aspect, there are larger difficulty.
Therefore, it is necessary to a kind of technologies, calculate data based on tree hierarchy partition structure maintenance power grid to realize.
Summary of the invention
Technical solution of the present invention provide it is a kind of based on tree hierarchy partition structure maintenance power grid calculate data method and be
System, to solve the problems, such as that how to calculate data to power grid based on tree hierarchy partition structure safeguards.
To solve the above-mentioned problems, the present invention provides one kind calculates data based on tree hierarchy partition structure maintenance power grid
Method, which comprises
The supplemental characteristic of equipment component in power grid is encapsulated in plant stand, calculates data for the plant stand as grid simulation
Node in tree hierarchy structure；
The multiple ranks for determining multilayered structure in power grid hierarchical structure determine the rank of the plant stand, and by described more
A rank carries out space orientation management to the plant stand；
The permission that the tree-like hierarchical structure of data determines user is calculated according to the grid simulation.
Preferably, the supplemental characteristic of the equipment component includes: generator and its control system, transformer, reactive compensation
Device, ac and dc circuit, load, the model of direct current system and the supplemental characteristic in the model；
The plant stand includes power plant, substation, switchyard and converter station；The power plant is divided into fire by using the energy
Power plant, power station, nuclear power station, hydroenergy storage station, wind power station, photovoltaic plant etc.；
Wherein, the supplemental characteristic of ac and dc circuit is related with two plant stands, the ginseng of the equipment component in addition to ac and dc circuit
Number data exist only in a plant stand.
Preferably, in the determining power grid hierarchical structure multilayered structure multiple ranks, comprising:
Determine that power grid hierarchical structure is five ranks；Five ranks be respectively as follows: state's net, regional power grid, provincial power network,
Ground utility grid and County Power Grid.
Preferably, the attribute of the equipment component includes: affiliated plant stand and maintenance power grid.
Preferably, further includes: power grid hierarchical structure is defined by coding, by the coding to the rank of power grid
It is identified；
The relationship of different power grids is judged by the rank of different power grids.
Preferably, further includes: higher level's power grid of each power grid is identified by coding, each power grid setting most one
A higher level's power grid.
Based on another aspect of the present invention, provides and a kind of be based on what tree hierarchy partition structure maintenance power grid calculated data
System, the system comprises:
Initial cell, for the supplemental characteristic of equipment component in power grid to be encapsulated in plant stand, using the plant stand as electricity
Network simulation calculates the node in the tree-like hierarchical structure of data；
Determination unit determines the rank of the plant stand for determining multiple ranks of multilayered structure in power grid hierarchical structure,
And space orientation management is carried out to the plant stand by the multiple rank；
Permission unit, for calculating the permission that the tree-like hierarchical structure of data determines user according to the grid simulation.
Preferably, the supplemental characteristic of the equipment component includes: generator and its control system, transformer, reactive compensation
Device, ac and dc circuit, load, the model of direct current system and the supplemental characteristic in the model；
The plant stand includes power plant, substation, switchyard and converter station；The power plant is divided into fire by using the energy
Power plant, power station, nuclear power station, hydroenergy storage station, wind power station, photovoltaic plant etc.；
Wherein, the supplemental characteristic of ac and dc circuit is related with two plant stands, the ginseng of the equipment component in addition to ac and dc circuit
Number data exist only in a plant stand.
Preferably, in the determining power grid hierarchical structure multilayered structure multiple ranks, comprising:
Determine that power grid hierarchical structure is five ranks；Five ranks be respectively as follows: state's net, regional power grid, provincial power network,
Ground utility grid and County Power Grid.
Preferably, the attribute of the equipment component includes: affiliated plant stand and maintenance power grid.
Preferably, further include recognition unit, be used for: power grid hierarchical structure being defined by coding, passes through the volume
Code identifies the rank of power grid；
The relationship of different power grids is judged by the rank of different power grids.
Preferably, the recognition unit is also used to: being identified by coding to higher level's power grid of each power grid, Mei Ge electricity
Most higher level's power grids are arranged in net.
Technical solution of the present invention provide it is a kind of based on tree hierarchy partition structure maintenance power grid calculate data method and be
System, wherein method includes: that the supplemental characteristic of equipment component in power grid is encapsulated in plant stand, is calculated plant stand as grid simulation
Node in the tree-like hierarchical structure of data；The multiple ranks for determining multilayered structure in power grid hierarchical structure, determine the rank of plant stand,
And space orientation management is carried out to plant stand by multiple ranks；The tree-like hierarchical structure of data, which is calculated, according to grid simulation determines user
Permission.The a kind of of technical solution of the present invention offer calculates the method for data based on tree hierarchy partition structure maintenance power grid and is
System can provide quality data support for bulk power grid safe and stable operation, to ensure that the safety of power grid in high speed development is steady
Fixed operation, it is horizontal to improve Study on Power Grid Planning.
Detailed description of the invention
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by:
Fig. 1 is to be based on tree hierarchy partition structure according to one kind of the preferred embodiment for the present invention to safeguard that power grid calculates data
Method flow diagram；
Fig. 2 is the power grid hierarchical structure figure according to the preferred embodiment for the present invention；
Fig. 3 is to be based on tree hierarchy partition structure according to one kind of the preferred embodiment for the present invention to safeguard that power grid calculates data
System construction drawing.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is to be based on tree hierarchy partition structure according to one kind of the preferred embodiment for the present invention to safeguard that power grid calculates data
Method flow diagram.The grid simulation that the application embodiment provides calculates a kind of tree hierarchy partition structure method of data,
By the way that the parameter of all devices element in power grid to be encapsulated in plant stand, using plant stand as in grid simulation calculation data structure
Node carries out space orientation management to plant stand by " state-net-province-ground-county " Pyatyi power grid institutional framework, and defines user's dimension
Protect power grid and browsing power grid permission.Power grid all devices can spatially be belonged to by the tree hierarchy structure and carry out data pipe
Reason and maintenance, each equipment component have affiliated plant stand and maintenance two attributes of power grid simultaneously.The application is for device model
Parameter maintenance range authorizes the more extensive browse right of user according to the institutional framework of power grid, guarantees that user can modify it
Device model parameter in maintenance span, and the device model parameter in its visible range can be browsed.It can be with by this design
It realizes across unit, multi-user's concurrent maintenance device model parameter information.Conveniently set up that networked coordination is shared, operating mode is high
Effect, the quality of data are accurate, support the model data maintenance management system of all kinds of grid equipment elements, transport for bulk power grid safety and stability
Row provides quality data and supports.The parameter of all devices element in power grid is encapsulated in plant stand by the application embodiment, will
Plant stand calculates the node in the tree-like hierarchical structure of data as grid simulation, passes through " state-net-province-ground-county " Pyatyi power grid level
Structure carries out space orientation management to plant stand, while user right (maintenance power grid and browsing power grid) is also based on the tree hierarchy knot
Structure defines, and realizes the unification in equipment component electrical space and user right space.As shown in Figure 1, a kind of be based on tree hierarchy
Partition structure safeguards that the method that power grid calculates data, method include:
Preferably, in step 101: the supplemental characteristic of equipment component in power grid being encapsulated in plant stand, using plant stand as electricity
Network simulation calculates the node in the tree-like hierarchical structure of data.Preferably, the supplemental characteristic of equipment component includes: generator and its control
System, transformer, reactive power compensator, ac and dc circuit, load, the model of direct current system and the parameter number in model processed
According to；Plant stand includes power plant, substation, switchyard and converter station；Power plant by use the energy be divided into thermal power plant, power station,
Nuclear power station, hydroenergy storage station, wind power station, photovoltaic plant etc.；Wherein, the supplemental characteristic of ac and dc circuit has with two plant stands
It closes, the supplemental characteristic of the equipment component in addition to ac and dc circuit exists only in a plant stand.Preferably, the attribute of equipment component
Plant stand belonging to including: and maintenance power grid.
The parameter of all devices element in power grid is encapsulated in plant stand by the application, calculates number for plant stand as grid simulation
According to the node in tree hierarchy structure.In above-mentioned steps, equipment component parameter includes generator and its control system, transformation
Device, reactive power compensator, ac and dc circuit, load, the model of direct current system and the supplemental characteristic in model.The factory of the application
It stands including power plant, substation, switchyard and converter station, power plant is divided into thermal power plant, power station, nuclear power by using the energy
It stands, hydroenergy storage station, wind power station, photovoltaic plant etc.；Wherein, ac and dc circuit is related with two plant stands, other equipment member
Part exists only in a plant stand.
Preferably, in step 102: it determines multiple ranks of multilayered structure in power grid hierarchical structure, determines the rank of plant stand,
And space orientation management is carried out to plant stand by multiple ranks.Preferably, the multiple of multilayered structure in power grid hierarchical structure are determined
Rank, comprising: determine that power grid hierarchical structure is five ranks；Five ranks be respectively as follows: state's net, regional power grid, provincial power network,
Utility grid and County Power Grid.The application carries out space orientation to plant stand by " state-area-province-ground-county " Pyatyi power grid hierarchical structure
Management.
Preferably, in step 103: calculating the permission that the tree-like hierarchical structure of data determines user according to grid simulation.This Shen
Please user maintenance power grid and browsing power grid permission defined also based on the tree hierarchy partition structure.
The application user right includes maintenance electric network data and browsing electric network data, and the tree of data is calculated according to grid simulation
Shape level partition structure defines user right.Each equipment component has affiliated plant stand and maintenance two attributes of power grid simultaneously,
The unification in equipment component electrical space and user right space may be implemented.
Preferably, further includes: power grid hierarchical structure is defined by coding, by encoding the rank progress to power grid
Identification；The relationship of different power grids is judged by the rank of different power grids.
Preferably, further includes: higher level's power grid of each power grid is identified by coding, each power grid setting most one
A higher level's power grid.
In the application, " state-net-province-ground-county " Pyatyi power grid be respectively state's net, regional power grid, provincial power network, alternating current
Net and County Power Grid.Wherein, for the ease of the subordinate relation of identification power grid, using nine coding modes, format is such as
ABBCCDDEE, the first bit identification " state " indicate state's net or southern net；Two or three bit identification " net " indicates six big regional power grids, such as
East China, North China, Central China, northeast, northwest and southwest；Four or five bit identification " province " indicates provincial power network, such as Beijing, Tianjin, river
North, Shanxi, Meng Xi, Ji Bei, Shandong；Six or seven bit identification " ground " indicates ground utility grid, such as Datong District, Shuozhou, Xinzhou, Taiyuan, sun
Spring, Lvliang City, Jinzhong City, Changzhi, Linfen, Jincheng, Yuncheng；Eight or nine bit identification " county ", indicate County Power Grid, as Shuozhou Shuocheng District,
Shuozhou Pinglu District, Shuozhou Shanyin County, Shuozhou Ying County, Shuozhou Youyu County, Shuozhou Huairen County.The application, each plant stand must have it
Affiliated power grid rank, and can identify power grid rank by coding, judge the relationship between different power grids, screen the same level power grid
And its data of junior's power grid, efficiently succinct criterion is provided for data classification query statistic, data grant, data extraction etc..
In the application, one and only one higher level's power grid mark should all be arranged in each power grid mark, when higher level's power grid is identified as sky,
Illustrate that there is no higher level's power grids for this power grid mark.In the application, electricity belonging to plant stand should be divided according to the topological relation of grid equipment
Net guarantees that the equipment topology in specified power grid is complete, and specified power grid rank should meet calculating or adjustment in batches calculates data
Demand.
The grid simulation of the application calculates a kind of tree hierarchy partition structure method of data, by setting all in power grid
The parameter of standby element is encapsulated in plant stand, using plant stand as the node in grid simulation calculation data structure, passes through " state-net-
Province-ground-county " Pyatyi power grid institutional framework carries out space orientation management to plant stand, and defines user maintenance power grid and browsing power grid
Permission.Power grid all devices can spatially be belonged to by the tree hierarchy structure and carry out data management and maintenance, Mei Geshe
Standby element has affiliated plant stand and maintenance two attributes of power grid simultaneously.
For the parameter maintenance range of device model, user is authorized according to the institutional framework of power grid and more widely browses power
Limit guarantees that user can modify the device model parameter in its maintenance span and browse the device model in its visible range
Parameter.It may be implemented by this design across unit, multi-user's concurrent maintenance device model parameter information.Conveniently set up network
Change the model data maintenance management body that coordination sharing, operating mode is efficient, the quality of data is accurate, supports all kinds of grid equipment elements
System provides quality data for bulk power grid safe and stable operation and supports.
The application embodiment is illustrated above: grid simulation provided by the present application calculates a kind of tree of data
Shape level partition structure method, this method mainly comprise the steps that
(1) parameter of all devices element in power grid is encapsulated in plant stand, calculates data for plant stand as grid simulation
Node in structure；
(2) space orientation management is carried out to plant stand by " state-area-province-ground-county " Pyatyi power grid institutional framework；
(3) the maintenance power grid of user and browsing power grid permission are defined also based on tree hierarchy partition structure.
In step (1), equipment component parameter includes generator and its control system, transformer, reactive power compensator, hands over directly
Flow Line, load, the model of direct current system and the supplemental characteristic in model；
Plant stand includes power plant, substation, switchyard and converter station, and power plant is divided into thermal power plant, water by using the energy
Power station, nuclear power station, hydroenergy storage station, wind power station, photovoltaic plant etc.；
Wherein, ac and dc circuit is related with two plant stands, and other equipment element exists only in a plant stand.
In step (2), " state-net-province-ground-county " Pyatyi power grid be respectively state's net, regional power grid, provincial power network, alternating current
Net and County Power Grid；
Wherein, for the ease of identifying the subordinate relation of power grid, using nine coding modes, format such as ABBCCDDEE, first
Bit identification " state " indicates state's net or southern net；Two or three bit identification " net ", indicate six big branch's power grids, as East China, North China, Central China,
Northeast, northwest and southwest；Four or five bit identification " province " indicates provincial power network, such as Beijing, Tianjin, Hebei, Shanxi, Meng Xi, Ji
North, Shandong；Six or seven bit identification " ground " indicates ground utility grid, such as Datong District, Shuozhou, Xinzhou, Taiyuan, Yangquan, Lvliang City, Jinzhong City, length
It controls, Linfen, Jincheng, Yuncheng；Eight or nine bit identification " county " indicates County Power Grid, such as Shuozhou Shuocheng District, Shuozhou Pinglu District, Shuozhou
Shanyin County, Shuozhou Ying County, Shuozhou Youyu County, Shuozhou Huairen County.
Wherein, each plant stand must have its affiliated power grid rank, and can identify power grid rank, judgement not by coding
With the relationship between power grid, screen the data of the same level power grid and its junior's power grid, be data classification query statistic, data grant,
The efficiently succinct criterion of the offers such as data extraction；
Wherein, the affiliated power grid of plant stand should be divided according to the topological relation of grid equipment, guarantees that the equipment in specified power grid is opened up
It flutters completely, specified power grid rank should meet the needs of calculating or adjustment in batches calculating data.
Fig. 2 is the power grid hierarchical structure figure according to the preferred embodiment for the present invention.As shown in Fig. 2, the volume of settable state's net
Code is 100000000, and higher level's power grid is not present in state's net, and higher level's power grid is identified as sky；North China Power Telecommunication Network is encoded to
102000000, Central China Power Grid is encoded to 103000000, and North China Power Telecommunication Network and Central China Power Grid are coordination；The volume of Shanxi Power Network
Code is 102040000, and Shanxi Power Network is subordinated to North China Power Telecommunication Network；Shuozhou power grid is encoded to 102040200, the electricity of Shuozhou Shuocheng District
Net is encoded to 102040201.
In step (3), user right includes maintenance electric network data and browsing electric network data, calculates data according to grid simulation
Tree hierarchy partition structure define user right.Each equipment component has two, power grid categories of affiliated plant stand and maintenance simultaneously
Property, the unification in equipment component electrical space and user right space may be implemented.
Fig. 3 is to be based on tree hierarchy partition structure according to one kind of the preferred embodiment for the present invention to safeguard that power grid calculates data
System construction drawing.As shown in figure 3, a kind of system for calculating data based on tree hierarchy partition structure maintenance power grid, system packet
It includes:
Initial cell 301, for the supplemental characteristic of equipment component in power grid to be encapsulated in plant stand, using plant stand as power grid
Node in the tree-like hierarchical structure of simulation calculation data；
Determination unit 302 determines the rank of plant stand for determining multiple ranks of multilayered structure in power grid hierarchical structure,
And space orientation management is carried out to plant stand by multiple ranks；
Permission unit 303, for calculating the permission that the tree-like hierarchical structure of data determines user according to grid simulation.
Preferably, the supplemental characteristic of equipment component include: generator and its control system, transformer, reactive power compensator,
Ac and dc circuit, load, the model of direct current system and the supplemental characteristic in model；
Plant stand includes power plant, substation, switchyard and converter station；Power plant is divided into thermal power plant, water by using the energy
Power station, nuclear power station, hydroenergy storage station, wind power station, photovoltaic plant etc.；
Wherein, the supplemental characteristic of ac and dc circuit is related with two plant stands, the ginseng of the equipment component in addition to ac and dc circuit
Number data exist only in a plant stand.
Preferably, multiple ranks of multilayered structure in power grid hierarchical structure are determined, comprising:
Determine that power grid hierarchical structure is five ranks；Five ranks are respectively as follows: state's net, regional power grid, provincial power network, districts and cities
Power grid and County Power Grid.
Preferably, the attribute of equipment component includes: affiliated plant stand and maintenance power grid.
Preferably, further include recognition unit, be used for: power grid hierarchical structure being defined by coding, pass through coding pair
The rank of power grid is identified；
The relationship of different power grids is judged by the rank of different power grids.
Preferably, recognition unit is also used to: being identified by coding to higher level's power grid of each power grid, each power grid is set
Set most higher level's power grids.
A kind of system 300 that data are calculated based on tree hierarchy partition structure maintenance power grid of the preferred embodiment for the present invention
With a kind of 100 phase of method for calculating data based on tree hierarchy partition structure maintenance power grid of another preferred embodiment of the present invention
It is corresponding, it is no longer repeated herein.
The present invention is described by reference to a small amount of embodiment.However, it is known in those skilled in the art, as
Defined by subsidiary Patent right requirement, in addition to the present invention other embodiments disclosed above equally fall in it is of the invention
In range.
Normally, all terms used in the claims are all solved according to them in the common meaning of technical field
It releases, unless in addition clearly being defined wherein.All references " one // be somebody's turn to do [device, component etc.] " are explained with being all opened
For at least one example in device, component etc., unless otherwise expressly specified.The step of any method disclosed herein, does not all have
Necessity is run with disclosed accurate sequence, unless explicitly stated otherwise.
Claims (12)
1. a kind of method for calculating data based on tree hierarchy partition structure maintenance power grid, which comprises
The supplemental characteristic of equipment component in power grid is encapsulated in plant stand, it is tree-like to calculate data using the plant stand as grid simulation
Node in hierarchical structure；
The multiple ranks for determining multilayered structure in power grid hierarchical structure determine the rank of the plant stand, and pass through the multiple grade
It is other that space orientation management is carried out to the plant stand；
The permission that the tree-like hierarchical structure of data determines user is calculated according to the grid simulation.
2. according to the method described in claim 1, the supplemental characteristic of the equipment component include: generator and its control system,
Transformer, reactive power compensator, ac and dc circuit, load, the model of direct current system and the supplemental characteristic in the model；
The plant stand includes power plant, substation, switchyard and converter station；The power plant is divided into thermoelectricity by using the energy
Factory, power station, nuclear power station, hydroenergy storage station, wind power station, photovoltaic plant；
Wherein, the supplemental characteristic of ac and dc circuit is related with two plant stands, the parameter number of the equipment component in addition to ac and dc circuit
According to existing only in a plant stand.
3. according to the method described in claim 1, in the determining power grid hierarchical structure multilayered structure multiple ranks, comprising:
Determine that power grid hierarchical structure is five ranks；Five ranks are respectively as follows: state's net, regional power grid, provincial power network, districts and cities
Power grid and County Power Grid.
4. according to the method described in claim 1, the attribute of the equipment component includes: affiliated plant stand and maintenance power grid.
5. according to the method described in claim 1, further include: power grid hierarchical structure is defined by coding, by described
Coding identifies the rank of power grid；
The relationship of different power grids is judged by the rank of different power grids.
6. according to the method described in claim 5, further include: higher level's power grid of each power grid is identified by coding, often
Most higher level's power grids are arranged in a power grid.
7. a kind of system that data are calculated based on tree hierarchy partition structure maintenance power grid, the system comprises:
Initial cell is imitated for the supplemental characteristic of equipment component in power grid to be encapsulated in plant stand using the plant stand as power grid
The true node calculated in the tree-like hierarchical structure of data；
Determination unit determines the rank of the plant stand, and lead to for determining multiple ranks of multilayered structure in power grid hierarchical structure
It crosses the multiple rank and space orientation management is carried out to the plant stand；
Permission unit, for calculating the permission that the tree-like hierarchical structure of data determines user according to the grid simulation.
8. system according to claim 7, the supplemental characteristic of the equipment component include: generator and its control system,
Transformer, reactive power compensator, ac and dc circuit, load, the model of direct current system and the supplemental characteristic in the model；
The plant stand includes power plant, substation, switchyard and converter station；The power plant is divided into thermoelectricity by using the energy
Factory, power station, nuclear power station, hydroenergy storage station, wind power station, photovoltaic plant；
Wherein, the supplemental characteristic of ac and dc circuit is related with two plant stands, the parameter number of the equipment component in addition to ac and dc circuit
According to existing only in a plant stand.
9. system according to claim 7, multiple ranks of multilayered structure in the determining power grid hierarchical structure, comprising:
Determine that power grid hierarchical structure is five ranks；Five ranks are respectively as follows: state's net, regional power grid, provincial power network, districts and cities
Power grid and County Power Grid.
10. system according to claim 7, the attribute of the equipment component includes: affiliated plant stand and maintenance power grid.
11. system according to claim 7 further includes recognition unit, is used for: being carried out by coding to power grid hierarchical structure
Definition identifies the rank of power grid by the coding；
The relationship of different power grids is judged by the rank of different power grids.
12. system according to claim 11, the recognition unit is also used to: by encoding higher level's electricity to each power grid
Net is identified, and most higher level's power grids are arranged in each power grid.
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