CN108493908B - A kind of locality protection partition method considering communication constraint - Google Patents
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
Abstract
A kind of locality protection partition method considering communication constraint; the technical requirements of this method facing area protection quick-action and reliability; consider to influence substation and the maximum hop count factor of master station communication; and subregional harmony is combined, a kind of locality protection main website Selection Model of permutation and combination preferentially method is proposed based on Floyd shortest path first；Further communication delay Multiple factors attributes are protected to establish substation partitioning model according to influence area property.In the partition process of substation, in conjunction with graph-theory techniques, the influence of the network parameters such as locality protection communication network topology relationship and length, bandwidth is considered, reasonable distribution is carried out to substation.Then N-1 channel-failures in rear predeterminable area are formed with regard to subregion, analyzes in its substation communication back haul, consider the influence of communication delay, amendment and supplement is further realized to subregion domain policy.Effectively overcome the shortcomings of that conventional method needs a large amount of artificial judgments and specified, realizes the Region homogenization of subregion, and intra-area communication time delay is shorter.
Description
Technical field
The invention belongs to relay protection fields in electric system, are a kind of locality protection square partitions for considering communication constraint
Method.
Background technique
Traditional back-up protection carries out tripping decision by information on the spot, and there are adjustings and cooperation, and difficult, extensive trend turns
When shifting the deficiencies of easy malfunction.With the development of communication technology, the collection areas power grid multi-source such as domain protection, wide area protection of standing letter
The regional protection that breath carries out decision is widely studied because solving the deficiency of traditional back-up protection.This kind of protection system is deposited
In a common feature, i.e., to wide area bulk power grid classifying rationally region, region decision center, center is respectively set in subregion
According to the communication technology and communication infrastructure, multi-source information in collecting zone is realized the on-line tuning of in-situ protection device or is based on
Protection differentiates and trips after multi information fault distinguishing principle realizes area fault.From principle it is found that regional protection zone divides
It is suitable whether, directly determine that can multi-source information quickly and accurately be transmitted to region decision center, and then determine region
Property protection quick-action and reliability.Therefore, carrying out reasonable subregion to wide area bulk power grid has weight to the regional protection of realization
Big and actual meaning.
Currently, having many scholars proposes some regional protection subregion thoughts and realization technology, research method master
If carrying out region by region finite element or grid type according to power grid electric topology, substation geographical location or protection philosophy
It divides, rarely has the requirement in view of communication system parameter and data transmission for regional protection real-time.Existing a kind of point
Area's method first selectes initial center station, divides a finite element region with specified radius.Further according to main website outside finite element region
Selection principle determines other main websites, and so on, all websites are subjected to region division (Yin Xianggen, Wang's Yang, Zhang Zhe.Adapt to intelligence
The limited wide area relay protection subregion of energy power grid and the strategy [J] that trips.Proceedings of the CSEE, 2010 (07): 1-7).It is another
Kind partition method determines zone boundary using method for searching shortest route based on adjacency matrix.Using boundary substation as starting point, use
Field Using Fuzzy Comprehensive Assessment determines next central station addressing, and repeat search process is until region division finishes (He Jinghan, Wang Zi
Fine jade, Zhang great Hai.Wide area backup protection partition method [J] based on graph theory and fuzzy evaluation.Electric Power Automation Equipment, 2017
(02): 75-82).But for the composition of regionality protection, locality protection depends on the communication technology and communication infrastructure, protection
Subregion should further consider the influence of communication constraint.
Summary of the invention
The present invention proposes a kind of locality protection partition method for considering communication constraint, protects communication constraint based on regional,
The real-time and harmony for comprehensively considering locality protection communication, establish main website Selection Model and substation partitioning model respectively.In
During main website chooses, a kind of permutation and combination preferentially method progress main website selection is proposed based on Floyd shortest path first.In substation
In partition process, in conjunction with graph-theory techniques, graph-theory techniques basic theories writes " Graph Theory & Its Application " referring to Zhang Xiandi, Li Zhengliang, high
Equal education publishing house, 2005.Consider the influence of the network parameters such as locality protection communication network topology relationship and length, bandwidth, it is right
Substation carries out reasonable distribution.Partition method proposed by the present invention can overcome conventional method to need a large amount of artificial judgments and specify
Deficiency, realize the Region homogenization of subregion, and intra-area communication time delay is shorter.
The technical scheme adopted by the invention is as follows:
A kind of locality protection partition method considering communication constraint, comprising the following steps:
Step 1: according to system topological, the connection matrix A of system connection can be characterized such as in conjunction with graph-theory techniques building
Shown in lower；
Step 2: according to given main website number, all possible combinations of main website is solved and store main website combination
Set P；
Step 3: each main website is combined, minimum hop count J of each substation from each main website is sought1,J2…Jm, take most
Small value is used as main website-substation minimum hop count si=min { J1,J2…Jm, all minimum hop counts are summed to obtainIt asks
Take selected main website combination Connected degree andThe different factor of two dimensions is normalized,Then weighting summation establishes corresponding main website Selection ModelWherein, for jZhong main website form, Sj 1Application permutation and combination preferentially seek by method
The normalized form of minimum hop count sum；LjIt is the normalized form of the sum of connected substation quantity of each main website for total Connected degree；Weight
ω1And ω2It is determined according to proportion quotiety using analytic hierarchy process (AHP).J1, J2…JmBetween respectively i-th of substation and m main website
Minimum hop count；siThe minimum value of minimum hop count between i-th of substation and m main website；To minimum hop count and it is normalized
Processing, Smax、SminMinimum hop count and maximum value and minimum value in respectively all main website combinations；LjFor for jZhong main website group
It closes, the sum of the Connected degree of all main websites；Lmax、LminThe maximum value and minimum value of Connected degree sum in respectively all main website combinations.
Then, optimal main website is solved using Floyd algorithm according to main website Selection Model combine Pj；
Step 4: when constructing the influences such as channel width, channel length communication according to system concrete condition combination graph-theory techniques
The corresponding channel width matrix B of the influence factor prolonged, channel length matrix D are as follows；
Step 5: substation partitioning model is establishedWherein,K all possible path set, k between two stations are
Either path in set, i are any channel in the corresponding t channel of path k；(1/bi)1For i-th channel width inverse
Value after normalization；(1/b)maxFor the maximum value of channel width inverse in entire communication network；(1/b)minFor in entire communication network
The minimum value of channel width inverse；di 1Value after being normalized for i-th channel length；diFor the length of i-th channel；dmaxFor
Channel length maximum value in entire communication network；dminFor channel length minimum value in entire communication network.Then, in conjunction with channel width
Matrix B, channel length matrix D solve the minimum weight matrix Q between any two website using Floyd algorithmk；
Step 6: weight minimum matrix Q required by step 5 is utilizedk, in conjunction with selected main website and plan substation number according to power
It is worth minimum principle and divides substation to each main website；
Step 7: unallocated substation is judged whether there is, and if it exists, go to step eight, unallocated substation is drawn
Point, if it does not exist, jump directly to step 7 output division result；
Step 8: being directed to each unallocated substation, according to required minimum weight matrix Qk, obtain remaining substation and master
Weight set between standing, chooses in this weight set that the corresponding main website of minimum value is as its optimal main website, by all unallocated sons
It stands and distributes to corresponding main website；
Step 9: subregion corrects principle under design N-1 channel-failures, and principle 1: there are feasible circuitous paths for one's respective area
When, detour is carried out to the information transmitted on broken string by one's respective area circuitous path；Its substation divides constant.Principle 2: if one's respective area
There is no can circuitous path, then need to be transmitted at this time other regions carry out detour.Judge through other regional channel detours to originally
Whether main website decision center in region meets delay requirement.If meeting delay requirement, by other region detours, substation is divided not
Become；If being unsatisfactory for delay requirement, the smallest main website of delay is transmitted information to, and the substation is divided to corresponding area
Domain.Two principle practical application schematic diagrames are shown in attached drawing 1.Division result is modified according to above-mentioned amendment principle.Finally, output point
Area's result.
The present invention is a kind of locality protection partition method for considering communication constraint, and advantage is:
1) present invention is directed to requirement of the locality protection for real-time communication, reliability, considers shadow during subregion
The Multiple factors for ringing communication delay ensure that after carrying out zone configuration by partitioning strategies proposed by the present invention that communication system can
Meet the requirement that multi-source information is transmitted in locality protection.
2) present invention emphasis when design main website Selection Model consider to collect master information the maximum hop count of influence because
Element, to introduce Connected degree and this index, the permutation and combination for devising a kind of suitable main website selection is selected convenient for selecting optimal main website
Excellent method can effectively ensure that the harmony of communication system after subregion.
3) for the present invention when designing substation partitioning model, considering comprehensively influences the institute that substation information is transmitted to main website time delay
There is factor, ensure that the science in terms of substation is divided in communication constraint.
4) the case where present invention considers N-1 channel-failures situation, need to carry out detour processing to the information on broken string.For
Different channel-failures situations, is arranged different round about manners, makees corresponding amendment to division result.Communication is effectively guaranteed
System is able to satisfy the communication constraint of locality protection under normal circumstances and in the case of channel-failures.
Detailed description of the invention
Fig. 1 is the flow chart for considering the locality protection partition method of communication constraint.
Fig. 2 (a) is disconnection information round about manner schematic diagram (detour in information one's respective area) under different channels fault condition；
Fig. 2 (b) is that (information is circuitous by other regions for disconnection information round about manner schematic diagram under different channels fault condition
It returns)；
Fig. 2 (c) is that (information is transferred to other regions master to disconnection information round about manner schematic diagram under different channels fault condition
It stands).
Fig. 3 is the corresponding communication network topology figure of IEEE39 node system.
Specific embodiment
A kind of locality protection partition method considering communication constraint, comprising the following steps:
Step 1: in conjunction with graph-theory techniques, power telecommunication network is indicated with non-directed graph G=(V, E).Wherein V={ Vi|i
=1,2 ..., p } be fundamental node set, a substation in each node on behalf electric system；E={ Ei| i=1,
2 ..., q } it is the branch collection for connecting fundamental node, each branch, which represents the fiber optic communication between connection substation and substation, to be believed
Road.The value of branch weight E can represent the physical significances such as channel length.It is closed according to the connection in system between substation and substation
System building connection matrix A.
Step 2: according to given main website number, all possible combinations of main website is solved and store main website combination
Set P；
Step 3: P is combined for each main websitej, it is based on main website Selection Model, preferentially method is sought most using permutation and combination
Excellent main website combination, i.e., combine this g kind, preferentially selects minimum hop count and the higher main website combination of smaller and Connected degree as most
Excellent combination；
Step 4: according to concrete conditions such as channel width each in system, channel lengths, the graph theory skill in conjunction with described in step 1
Art is assigned to branch collection E, and then constructs channel width matrix B, channel length matrix D；
Step 5: by the hop count J of path kk, channel width biAnd channel length diAfter normalization, by the shadow to communication delay
The degree of sound is weighted summation, establishes substation partitioning model.In conjunction with channel width matrix B, channel length matrix D, according to substation
Partitioning model solves the minimum weight matrix Q between any two website using Floyd algorithmk；
Step 6: weight minimum matrix Q required by step 5 is utilizedk, in conjunction with selected main website and plan substation number according to power
Value QkMinimum principle divides substation to each main website；
Step 7: unallocated substation is judged whether there is, and if it exists, go to step eight, if it does not exist, jump directly to
Step 9 exports division result；
Step 8: being directed to each unallocated substation, according to weight matrix required in step 5, obtain remaining substation with
Weight set between main website, choosing the corresponding main website of minimum value in this weight set, will be all unallocated as its optimal main website
Substation is distributed to corresponding main website；
Step 9: it configures using interregional repetition substation as boundary substation, is corrected according to subregion under N-1 channel-failures
Principle is modified, and exports division result.
In step 1, in conjunction with previous constructions non-directed graph G=(V, E) technology, the connection matrix of electric system is constructed, with characterization
System topological connection relationship.The building method of connection matrix A is for example shown below:
Wherein, i, j are respectively substation's number, and A (i, j) is that connection matrix A the i-th row jth arranges corresponding value.
In step 2, for given district system, it is assumed that substation's sum is n, and given main website number is m, main website
The possibility of random combine hasKind, by main website possible in this g combine storage for permutation and combination preferentially method select it is optimal
Main website combination.
In step 3, each main website is combined, minimum hop count of each substation from each main website is sought, is minimized work
For main website-substation minimum hop count, and seek selected main website combination Connected degree and, two factors normalization rear weight is added, that is, is built
Corresponding main website Selection Model has been found, optimal main website has been solved using Floyd algorithm according to main website Selection Model and combines；
In step 4, using previous constructions non-directed graph G=(V, E) technology, channel length bandwidth matrices B is constructed, channel is long
Spend matrix D.
In step 5, in conjunction with channel width matrix B, channel length matrix D, Floyd is utilized most according to substation partitioning model
Short path algorithm solves the minimum weight matrix Q between any two websitek。
In step 6, using weight minimum matrix required by step 5, in conjunction with selected main website and plan substation number according to power
Value QkMinimum principle divides substation to each main website.
In step 7, checks all substation distribution conditions, judge whether there is unallocated substation.
In step 8, for each unallocated substation, from required weight matrix QkThe remaining substation of middle acquisition and main website
Between weight set, choose in this weight set that the corresponding main website of minimum value is as its optimal main website, by all unallocated substations
It distributes to corresponding main website.
In step 9, it is based on locality protection communication constraint, subregion under N-1 channel-failures is designed and corrects principle, and is right accordingly
Above-mentioned subregion is modified.
Following further describes the present invention with reference to the drawings.
The case where being located at same website there are a plurality of bus in IEEE39 node system, therefore will in corresponding communication system
It is combined into a point, to obtain the corresponding 17 nodal communication network topological diagram of IEEE39 bus-bar system, including 23 optical fiber letters
Road, as shown in Figure 3.Each channel length of system and bandwidth are shown in attached drawing 3.With the corresponding communication system of IEEE39 node system of Fig. 2
For, a kind of locality protection partition method considering communication constraint, specific embodiment is as follows:
Step 1: determining system connection matrix according to system topological combination graph-theory techniques, line number i and columns j are substation
Number, the value of corresponding position represent the connection relationship between substation and substation, and construction connection matrix A is as follows；
Step 2: according to given main website number, this example substation number is set as 3, owns to main websiteKind combine into
Row is solved and is stored；The set P of all main website combinations is as follows:
P=[1,2,3], [1,2,4] ..., [15,16,17] }
Step 3: each main website being combined, by permutation and combination, preferentially method main website Selection Model solves optimal main website group
It closes；Q can be obtainedjCorresponding main website combination, i.e., optimal main website group are combined into P when minimumj=[2,8,10]；
Step 4: constructing channel width, channel length etc. according to system concrete condition combination graph-theory techniques influences communication delay
Shadow
The corresponding matrix of the factor of sound；
Step 5: in conjunction with channel width matrix, channel length matrix, being solved according to substation partitioning model using Floyd algorithm
Minimum weight matrix between any two website；
Step 6: using above-mentioned required weight minimum matrix, in conjunction with selected main website and plan substation number according to weight QkMost
Small principle divides substation to each main website.Preliminary division result is as shown in table 1；
The substation number division result according to plan of table 1
Step 7: judging whether there is unallocated substation, and if it exists, go to step (8) jump directly to if it does not exist
Step 9 exports division result.In this example, substation B14, B16 are unallocated, therefore go to step 8；
Step 8: being directed to each unallocated substation, according to weight matrix required in step 5, obtain remaining substation and master
Weight set between standing, chooses in this weight set that the corresponding main website of minimum value is as its optimal main website, by all unallocated sons
It stands and distributes to corresponding main website.In this example, the weight set of remaining substation and main website is as follows；
Qk(B14)=[1.77 0.89 2.21]
Qk(B16)=[1.33 1.38 0.79]
Weight 0.89 between substation B14 and main website B8 is minimum value, the weight 0.79 between substation B16 and main website B10
Minimum value.Therefore, substation B14 should be divided in the corresponding region main website B8, and substation B16 should be divided in the corresponding region main website B10.
Step 9: configuring using interregional repetition substation as boundary substation, corrected according to subregion under N-1 channel-failures
Principle is modified division result, exports division result, this example division result is as follows.
2 substation all standing division result of table
Claims (6)
1. a kind of locality protection partition method for considering communication constraint, it is characterised in that the following steps are included:
Step 1: in conjunction with graph-theory techniques, building can characterize the connection matrix A of system connection；
Step 2: according to given main website number, solving all possible combinations of main website, and stores the g kind group of main website
Close P1....Pg；
Step 3: P is combined for each main websitej(j=1,2,3...g) is based on main website Selection Model, is selected using permutation and combination
Excellent method seeks optimal main website combination, i.e., this g kind is combined, preferential to select minimum hop count and the higher main website of smaller and Connected degree
Combination is used as optimum combination；
Step 4: according to channel width each in system, the concrete condition of channel length, the graph-theory techniques in conjunction with described in step 1 are assigned
It is worth and gives branch collection E, and then constructs channel width matrix B, channel length matrix D；
Step 5: by the hop count J of path kk, channel width biAnd channel length diAfter normalization, by the influence journey to communication delay
Degree is weighted summation, establishes substation partitioning model；In conjunction with channel width matrix B, channel length matrix D, divided according to substation
Model solves the weight minimum matrix Q between any two website using Floyd algorithmk；
Step 6: weight minimum matrix Q required by step 5 is utilizedk, in conjunction with selected main website and plan substation number, most according to weight
Minor matrix QkMinimum principle divides substation to each main website；
Step 7: unallocated substation is judged whether there is, and if it exists, go to step eight, if it does not exist, jump directly to step
Nine output division results；
Step 8: being directed to each unallocated substation, according to weight matrix required in step 5, obtains remaining substation and main website
Between weight set, choose in this weight set that the corresponding main website of minimum value is as its optimal main website, by all unallocated substations
It distributes to corresponding main website；
Step 9: it is configured using interregional repetition substation as boundary substation, corrects principle according to subregion under N-1 channel-failures
It is modified, exports division result.
2. a kind of locality protection partition method for considering communication constraint according to claim 1, which is characterized in that step 1
In, using the connection matrix of graph-theory techniques construction electric system, to characterize system topological connection relationship；The construction of connection matrix A
Method is for example shown below:
3. a kind of locality protection partition method for considering communication constraint according to claim 1, which is characterized in that step 2
In, for given district system, it is assumed that substation's sum is n, and given main website number is m, the possibility of main website random combine
HaveKind, by the possible main website combination storage of this g kind so that preferentially method selects optimal main website combination to permutation and combination.
4. a kind of locality protection partition method for considering communication constraint according to claim 1, it is characterised in that: step 3
In, each main website is combined, minimum hop count of each substation from each main website is sought, is minimized as main website-substation most
Small hop count, and seek selected main website combination Connected degree and two factors normalization rear weight is added, that is, establishes corresponding main website
Selection Model solves optimal main website using Floyd algorithm according to main website Selection Model and combines.
5. a kind of locality protection partition method for considering communication constraint according to claim 1, it is characterised in that: step 7
In, it checks all substation distribution conditions, judges whether there is unallocated substation.
6. a kind of locality protection partition method for considering communication constraint according to claim 1, it is characterised in that: step 9
In, it is based on locality protection communication constraint, subregion under N-1 channel-failures is designed and corrects principle, and above-mentioned subregion is repaired accordingly
Just；Correct principle, principle 1: one's respective area is there are when feasible circuitous path, by one's respective area circuitous path to transmitting on broken string
Information carries out detour；Its substation divides constant；Principle 2: if one's respective area there is no can circuitous path, need to be transmitted to it at this time
He carries out detour in region；Judge whether meet delay requirement through other regional channel detours to one's respective area main website decision center；If
Meet delay requirement, then by other region detours, it is constant to divide substation；If being unsatisfactory for delay requirement, transmit information to
The smallest main website of delay, and the substation is divided to corresponding region.
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Application publication date: 20180904 Assignee: Yichang Yizhixing Technology Co.,Ltd. Assignor: CHINA THREE GORGES University Contract record no.: X2023980034895 Denomination of invention: A Regional Protection Zoning Method Considering Communication Constraints Granted publication date: 20191108 License type: Common License Record date: 20230426 |
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