CN104123437B - Power transmission line cross-over identification method and system based on graph database and spatial information - Google Patents
Power transmission line cross-over identification method and system based on graph database and spatial information Download PDFInfo
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Abstract
According to the method and the system for identifying the power transmission line cross-over based on the graph database and the spatial information, data are stored on the basis of an original data physical topological structure, power transmission line towers are abstracted into nodes by establishing an equipment mapping table of a main network of a power grid, each section of power transmission line between the two towers is abstracted into a side, geographic coordinate attributes of the towers are abstracted into the attributes of the nodes, a power grid data model is established, then whether cross-over sections exist between every two lines can be obtained by utilizing a corresponding graph theory algorithm to judge whether the lines are cross-over, and further the specific position of the cross-over starting tower between the lines and the specific coordinates of the line intersection point can be obtained, so that the method and.
Description
Technical field
The present invention relates to electric power network technical field, more particularly to it is a kind of defeated based on chart database and spatial information
Electric line bridges discrimination method and system.
Background technology
With China's rapid development of economy, to the degree of dependence more and more higher of electric power, the development of electric power safety has been entered
A brand-new stages of historical development is entered.Power network is relation national energy security and the important infrastructure of lifelines of the national economy
And public utilities, it is that socio-economic development and national economy provide important energy safeguard, promotion economic society and can held to carry
The weighty responsibility of supervention exhibition.Modern society is to the reliability requirement more and more higher of supply of electric power, and the status of power industry is than ever
It is whenever all more important, electric power safety and efficiently be distinct issues.Electric power networks are most complicated in the world at present
One of artificial network, operation of power networks process has very big uncertainty, and the probability that failure occurs is also very high, it is therefore necessary to right
The construction of power transmission network is made rational planning for, and irrational wiring may bring various potential failure risks, and cross line fault is just
It is one kind therein.
Bridging line may cause cross line fault in power system, often betide the phases such as same bar circuit, same geographical position
In the extra-high voltage on adjacent line road, supergrid, cross line fault will directly affect zero-sequence current, phase to phase impedance, with vertical connection zero sequence side
To measurement parameters such as elements, and then the protection of circuit is influenceed, cause misoperation, the refused action of route protection, so that break down,
Power network power supply reliability is leveraged, jeopardizes power grid security, it is necessary to which it is studied.
Cross line fault is solved the problems, such as in addition to improving the safeguard measure of circuit, there is a need to the actual geographic wiring to circuit
Investigated.Due to the potential larger failure risk of bridging line caused by the unreasonable wiring of transmission line of electricity, it is necessary to by adjusting
The layout or emphasis of whole circuit strengthen the protection work of crossover region to tackle this risk, therefore find out the circuit and its tool of bridging
The crossover region of body has important Research Significance.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, chart database and spatial information are based on it is an object of the invention to provide one kind
Transmission line of electricity bridging discrimination method and system, it is intended to find out the region for occurring bridging line in power transmission network.
Technical scheme is as follows：
A kind of transmission line of electricity bridging discrimination method based on chart database and spatial information, wherein, methods described includes：
A, the device map by setting up power network major network, by electric power line pole tower it is abstract be node, between two shaft towers
Abstract every section of transmission line of electricity is side, and the geographical coordinate attribute abstraction of shaft tower is the attribute of node, sets up electric network data model；
B, using corresponding graph-theoretical algorithm, calculate with the presence or absence of line segment is intersected between circuit two-by-two, so as to judge that circuit is
No bridging.
The transmission line of electricity bridging discrimination method based on chart database and spatial information, wherein, after the step B also
Including：
C, when bridging line, obtain circuit span pick up the particular location of beginning shaft tower and the specific coordinate of circuit intersection point.
The transmission line of electricity bridging discrimination method based on chart database and spatial information, wherein, utilized in the step B
Before corresponding graph-theoretical algorithm, the multigraph retrieved is deteriorated into simple graph.
The transmission line of electricity bridging discrimination method based on chart database and spatial information, wherein, it is corresponding in the step B
Graph-theoretical algorithm is with Cypher scripts come abstract expression.
The transmission line of electricity bridging discrimination method based on chart database and spatial information, wherein, calculated in the step B
Go out between circuit two-by-two and to specifically include with the presence or absence of intersecting line segment：
B1, first determine whether whether overlapped between two circuits, intersect if being then not present；
If B2, misaligned, determine whether whether two circuits are parallel, be not present and intersect if parallel；Otherwise two circuit
Between exist intersect.
A kind of transmission line of electricity bridging identification system based on chart database and spatial information, wherein, the system includes：
Modeling unit is abstract for node, two by electric power line pole tower for the device map by setting up power network major network
Abstract every section of transmission line of electricity between individual shaft tower is side, and the geographical coordinate attribute abstraction of shaft tower is the attribute of node, sets up power network number
According to model；
Judging unit, for utilizing corresponding graph-theoretical algorithm, is calculated between circuit two-by-two with the presence or absence of intersecting line segment, so that
Judge whether circuit bridges.
The transmission line of electricity bridging identification system based on chart database and spatial information, wherein, in addition to：
Computing unit, for when bridging line, obtaining particular location and circuit intersection point that circuit span picks up beginning shaft tower
Specific coordinate.
The transmission line of electricity bridging identification system based on chart database and spatial information, wherein, in the judging unit
Before corresponding graph-theoretical algorithm, the multigraph retrieved is deteriorated into simple graph.
The transmission line of electricity bridging identification system based on chart database and spatial information, wherein, in the judging unit
Corresponding graph-theoretical algorithm is with Cypher scripts come abstract expression.
The transmission line of electricity bridging identification system based on chart database and spatial information, wherein, in the judging unit
Calculate between circuit two-by-two and to specifically include with the presence or absence of intersecting line segment：
Subelement is overlapped, for judging whether overlapped between two circuits, is intersected if being then not present；
Parallel subelement, for judging whether two circuits are parallel, is not present if parallel and intersects；Otherwise deposited between two circuits
Intersecting.
A kind of transmission line of electricity bridging discrimination method and system based on chart database and spatial information provided by the present invention,
The data storage on the basis of initial data physical topological structure, by setting up the device map of power network major network, by power transmission line
Abstract line pole tower is node, and abstract every section of transmission line of electricity between two shaft towers is side, and the geographical coordinate attribute abstraction of shaft tower is section
The attribute of point, sets up electric network data model, then using corresponding graph-theoretical algorithm, can try to achieve between circuit two-by-two with the presence or absence of handing over
Cross wires section judges whether circuit bridges, and further tries to achieve particular location and circuit intersection point that circuit span picks up beginning shaft tower
Specific coordinate, it is convenient and simple.
Brief description of the drawings
Fig. 1 bridges the flow chart of discrimination method for the transmission line of electricity of the present invention based on chart database and spatial information.
Fig. 2 bridges the preferable implementation of discrimination method for the transmission line of electricity of the present invention based on chart database and spatial information
The schematic diagram with the presence or absence of the algorithm principle intersected between circuit two-by-two is judged in example.
Fig. 3 bridges the preferable implementation of discrimination method for the transmission line of electricity of the present invention based on chart database and spatial information
In example two-by-two between line segment four kinds of position relationships schematic diagram.
Fig. 4 is the bridging mark figure that the general emigrant's DC lines of extra-high voltage 800kV and super-pressure 500kV inkstones worship A-wire circuit.
Fig. 5 bridges the structural frames of identification system for the transmission line of electricity of the present invention based on chart database and spatial information
Figure.
Embodiment
The present invention provides a kind of transmission line of electricity bridging discrimination method based on chart database and spatial information and system, to make
The purpose of the present invention, technical scheme and effect are clearer, clear and definite, and the embodiment that develops simultaneously referring to the drawings is further to the present invention
Describe in detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
Understand for convenience, the bridging of the transmission line of electricity based on chart database and spatial information of the present invention is introduced first
The core concept of discrimination method is：Electric network data and respective two-dimensional spatial information are stored in graph structure, complexity is relied on
Data are regarded as may be present multiple summits between the set of node and relation, two nodes, while there is direction and type, node and side tool
There is variable attribute list.
Fig. 1 is referred to, Fig. 1 is the transmission line of electricity bridging discrimination method of the present invention based on chart database and spatial information
Flow chart.As shown in figure 1, methods described includes：
S100, the device map by setting up power network major network, by electric power line pole tower it is abstract be node, between two shaft towers
Every section of transmission line of electricity it is abstract be side, the geographical coordinate attribute abstraction of shaft tower is the attribute of node, sets up electric network data model；Tool
For body, by the data storage on the basis of initial data physical topological structure, store data in graph structure, information is built
Mould includes node, the 3 kinds of structural units in side and attribute, and multiple summits may be present between two nodes, while have direction and type, node and
While having variable attribute list.
S200, using corresponding graph-theoretical algorithm, calculate with the presence or absence of line segment is intersected between circuit two-by-two, so as to judge circuit
Whether bridge.In the present embodiment, the two-dimensional space information needed for bridging line evaluation algorithm can be calculated by geographic coordinate information
Draw.It is improved and high performance Network Topology Algorithm using what chart database was provided for oneself, can try to achieve between circuit two-by-two whether
Judge whether circuit bridges in the presence of line segment is intersected.
The perfect and high performance Network Topology Algorithm provided for oneself using chart database is to the quick traversal of data storage and place
Reason, the algorithm can not only travel through all nodes and side with identical speed, and traversal speed is hardly by the data for constituting figure
Amount influence.
As shown in Fig. 2 wherein, niAnd njThe segments of respectively two transmission lines of electricity.Ergodic algorithm is depended on from diagram data
The segmentation two-dimensional space information of the transmission line of electricity retrieved in storehouse.Specifically include：
First determine whether whether overlapped between two circuits, intersect if being then not present；
If misaligned, determine whether whether two circuits are parallel, be not present and intersect if parallel；Otherwise between two circuits
In the presence of intersection.
Further, as shown in Fig. 2 due to there is parallel erected on same tower in practical power systems, it is impossible to judged
For bridging line, therefore multigraph (multigraph, point-to-point transmission that will retrieve is needed before specific bridging evaluation algorithm is implemented
There may be multiple summits) simple graph (simple graph, point-to-point transmission only has a line) is deteriorated to, in any chart database
There is ready-made algorithm, do not repeat.
The core of the present invention is the Intersection for judging twolink, is likely encountered four kinds of situations as shown in Figure 3.In Fig. 3
A kind of situation overlaps for two line segments, is evaded by the way that multigraph is degenerated into simple graph.If circuit 1 i-th is segmented two
Extreme coordinates are respectively (xa、ya) and (xb、yb), it is respectively (x that the jth of circuit 2, which is segmented two extreme coordinates,c,、yc) and (xd、yd),
It can then judge whether two line segments are parallel by following formula：
(yb-ya)×(xd-xc)=(yd-yc)×(xb-xa)；
If two line segments are not parallel, it can judge whether it may intersect by solving the corresponding equation of two line segments, equation
General solution be shown below：
The third situation in above formula corresponding diagram 3.When it is 0 that denominator is will appear from the 4th kind of situation above formula, now
Directly with x=constants come instead of the original equations of x.
If the crosspoint obtained within quadrilateral area, mean to be found that determined by four end points circuit across
Connect, otherwise mean that twolink segmentation is not bridged.
Further, as shown in figure 1, also including after step S200：
S300, when bridging line, obtain circuit span pick up the particular location of beginning shaft tower and the specific seat of circuit intersection point
Mark.
Illustrate the above-mentioned transmission line of electricity bridging based on chart database and spatial information below by a specific example
How discrimination method is realized.
So that the general emigrant's DC lines of super-pressure 800kV in Guangxi Power Grid major network and super-pressure 500kV inkstones worship A-wire circuit as an example
Carry out the research of crossover region.There are two crossover regions between two lines road, two can be tried to achieve according to the ergodic algorithm of the present invention
The relevant information of crossover region, mainly originates the tool of shaft tower coordinate and circuit joining accordingly including two crossover regions
Body coordinate, it is as shown in the table.
The bridging identification result of two actual high-voltage transmission lines of electricity
Also referring to Fig. 4, it is that the general emigrant's DC lines of extra-high voltage 800kV and super-pressure 500kV inkstones worship A-wire circuit
Bridging mark figure.There are two crossover regions between two lines road in actual conditions, the present invention has tried to achieve the two crossover regions
Relevant information, including two crossover regions originate shaft tower coordinate and the specific coordinate of circuit joining, acquired results accordingly
It is consistent with actual conditions.
Therefore, the transmission line of electricity bridging discrimination method based on chart database and spatial information calculates accurate, side
Just it is simple.
Based on the above method, distinguished present invention also offers a kind of transmission line of electricity bridging based on chart database and spatial information
Knowledge system, as shown in figure 5, the system includes：
Modeling unit 100 is abstract for section by electric power line pole tower for the device map by setting up power network major network
Abstract every section of transmission line of electricity between point, two shaft towers is side, and the geographical coordinate attribute abstraction of shaft tower is the attribute of node, sets up electricity
Network data model；
Judging unit 200, for utilizing corresponding graph-theoretical algorithm, is calculated between circuit two-by-two with the presence or absence of intersecting line segment,
So as to judge whether circuit bridges.
Preferably, as shown in figure 5, the transmission line of electricity based on chart database and spatial information is bridged in identification system,
Also include：
Computing unit 300, the particular location and circuit that beginning shaft tower is picked up for when bridging line, obtaining circuit span is handed over
The specific coordinate of point.
Preferably, it is described to judge single in the transmission line of electricity bridging identification system based on chart database and spatial information
Utilized in member before corresponding graph-theoretical algorithm, the multigraph retrieved is deteriorated into simple graph.
Preferably, it is described to judge single in the transmission line of electricity bridging identification system based on chart database and spatial information
In member corresponding graph-theoretical algorithm with Cypher scripts come abstract expression.
Preferably, it is described to judge single in the transmission line of electricity bridging identification system based on chart database and spatial information
Calculate between circuit two-by-two and specifically included with the presence or absence of intersecting line segment in member：
Subelement is overlapped, for judging whether overlapped between two circuits, is intersected if being then not present；
Parallel subelement, for judging whether two circuits are parallel, is not present if parallel and intersects；Otherwise deposited between two circuits
Intersecting.
Functional unit in said system has all been described in detail in method, just no longer repeats one by one here
.
In summary, it is provided by the present invention based on chart database and spatial information transmission line of electricity bridging discrimination method and
System, the data storage on the basis of initial data physical topological structure, will be defeated by setting up the device map of power network major network
Abstract electric wire line pole tower is node, and abstract every section of transmission line of electricity between two shaft towers is side, the geographical coordinate attribute abstraction of shaft tower
For the attribute of node, electric network data model is set up, then using corresponding graph-theoretical algorithm, can try to achieve and whether deposit between circuit two-by-two
Judge whether circuit bridges intersecting line segment, and further try to achieve particular location and circuit friendship that circuit span picks up beginning shaft tower
The specific coordinate of point, it is convenient and simple.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (8)
1. a kind of transmission line of electricity bridging discrimination method based on chart database and spatial information, it is characterised in that methods described bag
Include：
A, the device map by setting up power network major network, by electric power line pole tower it is abstract be node, every section between two shaft towers
Abstract transmission line of electricity is side, and the geographical coordinate attribute abstraction of shaft tower is the attribute of node, sets up electric network data model；
B, using corresponding graph-theoretical algorithm, calculate between circuit two-by-two with the presence or absence of intersecting line segment, thus judge circuit whether across
Connect；
Calculate between circuit two-by-two and specifically included with the presence or absence of intersecting line segment in the step B：
B1, first determine whether whether overlapped between two circuits, intersect if being then not present；
If B2, misaligned, determine whether whether two circuits are parallel by below equation, intersect if being then not present：
(yb-ya)×(xd-xc)=(yd-yc)×(xb-xa)；
If B3, not parallel, determine whether whether two circuits intersect by below equation, if the crosspoint obtained is by four
Determined by end points within quadrilateral area, then two bridging line, otherwise two circuits do not bridge：
Wherein, two extreme coordinates of circuit one are respectively (xa、ya) and (xb、yb), two extreme coordinates of circuit two are respectively
(xc,、yc) and (xd、yd), when occur denominator be 0 situation when, directly with x=constants come instead of above-mentioned formula x.
2. the transmission line of electricity based on chart database and spatial information bridges discrimination method according to claim 1, its feature exists
In also including after the step B：
C, when bridging line, obtain circuit span pick up the particular location of beginning shaft tower and the specific coordinate of circuit intersection point.
3. the transmission line of electricity based on chart database and spatial information bridges discrimination method according to claim 1, its feature exists
In, in the step B utilize corresponding graph-theoretical algorithm before, the multigraph retrieved is deteriorated into simple graph.
4. the transmission line of electricity based on chart database and spatial information bridges discrimination method according to claim 1, its feature exists
In, in the step B corresponding graph-theoretical algorithm with Cypher scripts come abstract expression.
5. a kind of transmission line of electricity bridging identification system based on chart database and spatial information, it is characterised in that the system bag
Include：
Modeling unit is abstract for node, two bars by electric power line pole tower for the device map by setting up power network major network
Abstract every section of transmission line of electricity between tower is side, and the geographical coordinate attribute abstraction of shaft tower is the attribute of node, sets up electric network data mould
Type；
Judging unit, for utilizing corresponding graph-theoretical algorithm, is calculated with the presence or absence of line segment is intersected between circuit two-by-two, so as to judge
Whether circuit bridges；
Calculate between circuit two-by-two and specifically included with the presence or absence of intersecting line segment in the judging unit：
Subelement is overlapped, for judging whether overlapped between two circuits, is intersected if being then not present；
Parallel subelement, determines whether whether two circuits are parallel by below equation, intersects if being then not present：
(yb-ya)×(xd-xc)=(yd-yc)×(xb-xa)；
Intersecting subelement, determines whether whether two circuits intersect by below equation, if the crosspoint obtained is by four ends
Put within identified quadrilateral area, then two bridging lines, otherwise two circuits are not bridged：
Wherein, two extreme coordinates of circuit one are respectively (xa、ya) and (xb、yb), two extreme coordinates of circuit two are respectively
(xc,、yc) and (xd、yd), when occur denominator be 0 situation when, directly with x=constants come instead of above-mentioned formula x.
6. the transmission line of electricity based on chart database and spatial information bridges identification system according to claim 5, its feature exists
In, in addition to：
Computing unit, the particular location of beginning shaft tower and the tool of circuit intersection point are picked up for when bridging line, obtaining circuit span
Body coordinate.
7. the transmission line of electricity based on chart database and spatial information bridges identification system according to claim 5, its feature exists
In, in the judging unit utilize corresponding graph-theoretical algorithm before, the multigraph retrieved is deteriorated into simple graph.
8. the transmission line of electricity based on chart database and spatial information bridges identification system according to claim 5, its feature exists
In, in the judging unit corresponding graph-theoretical algorithm with Cypher scripts come abstract expression.
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| CN105243206B (en) * | 2015-09-25 | 2020-07-07 | 中国南方电网有限责任公司超高压输电公司广州局 | Method for verifying overlapping elements in power grid model |
| CN105243205B (en) * | 2015-09-25 | 2018-11-23 | 中国南方电网有限责任公司超高压输电公司广州局 | The method of calibration of suspicious breakpoint in a kind of electric network model |
| CN106055590A (en) * | 2016-05-23 | 2016-10-26 | 环球大数据科技有限公司 | Power grid data processing method and system based on big data and graph database |
| CN108020750A (en) * | 2016-11-02 | 2018-05-11 | 全球能源互联网研究院 | A kind of power distribution network power failure range analysis method and analytical equipment |
| CN107222339B (en) * | 2017-05-27 | 2020-06-05 | 全球能源互联网研究院有限公司 | Graph database-based fault analysis method and device for power information communication system |
| CN111815147B (en) * | 2020-07-01 | 2023-12-19 | 广东信通通信有限公司 | Tower pole sequencing method and device, storage medium and computer equipment |
| CN111831711B (en) * | 2020-07-27 | 2022-06-14 | 广东电网有限责任公司 | Laser coordinate-based power transmission line common-tower and line cross-crossing statistical method |
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