CN115796329B - Power grid planning system based on geographic information - Google Patents
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Abstract
The invention provides a power grid planning system based on geographic information, which comprises a terrain analysis module, a power grid node analysis module, a route planning module and a power transmission tower location module, wherein the terrain analysis module is used for processing and analyzing the terrain of a power grid area to be planned, the power grid node analysis module is used for analyzing the distribution of nodes in the area, the route planning module is used for designing a transmission route based on a terrain analysis result and a node analysis result, and the power transmission tower location module is used for selecting the construction position of a power transmission tower on the transmission route; the system can plan the construction position of the power transmission tower by combining geographic information, reduces the phenomenon of height difference of adjacent power transmission towers and reduces the amplitude of the height difference, so that the power transmission towers are not easy to incline.
Description
Technical Field
The invention relates to the field of electric power, in particular to a power grid planning system based on geographic information.
Background
The power transmission tower is a supporting point of an overhead line, one loop is erected on the power transmission tower and is a single loop power transmission tower, and two loops are erected on the power transmission tower and are double loop power transmission towers. The single loop is a loop with a power supply on load, the power transmission tower is a high-rise structure, is very sensitive to inclination deformation, has high requirements on uneven settlement of a foundation, and has independent foundation, enlarged foundation and pile foundation in a common structural form of the power transmission tower foundation, and the structural form of the power transmission tower mainly adopts a steel structure. In order to reduce the phenomenon of inclination deformation of the power transmission tower, it is very important to select proper construction points and make an overall plan.
The foregoing discussion of the background art is intended to facilitate an understanding of the present invention only. This discussion is not an admission or admission that any of the material referred to was common general knowledge.
Many power grid planning systems have been developed, and through extensive searching and reference, it has been found that existing planning systems have a system as disclosed in publication number CN110957718B, and these systems generally include building a database of current status of a power grid in a geographic information system; determining a heavy-load transformer substation and a heavy-load transmission line; dividing an existing substation into a plurality of areas, each area comprising at least one substation; calculating the power demand pre-measurement in each area in the preset planning period according to the annual maximum load of the existing transformer substation in each area, the urban land load density and the building area coincidence density in the preset planning period in the geographic information system; setting power supply planning project information, a new transformer substation selection principle, an extension transformer substation selection principle and transformer substation site selection conditions in a preset planning period in a geographic information system; and constructing a planning and site selection library of various transformer substations of each water flat year in a preset planning period. But the system is mainly used for selecting and planning power grid nodes, namely substations, but is not suitable for site selection planning of power transmission towers communicated with the substations.
Disclosure of Invention
The invention aims to provide a power grid planning system based on geographic information aiming at the defects.
The invention adopts the following technical scheme:
The utility model provides a power grid planning system based on geographic information, includes topography analysis module, electric wire netting node analysis module, route planning module and transmission tower site selection module, topography analysis module is used for carrying out processing analysis to the topography of the planning electric wire netting region, electric wire netting node analysis module carries out analysis to the distribution of node in the region, route planning module designs out transmission route based on topography analysis result and node analysis result, transmission tower site selection module selects the position of setting up of transmission tower on transmission route;
The topography analysis module comprises a topography segmentation processor and a partition calculation processor, the topography segmentation processor divides the whole area into subareas, the partition calculation processor calculates a suitable index for each subarea, the power grid node analysis module comprises a node calculation processor, and the node calculation processor is used for calculating a central index of each power grid node;
The route planning module comprises a first computing processor and a first information memory, wherein the first computing processor is responsible for processing computing tasks, and the first information memory is responsible for storing data required and generated by the computing tasks;
The route planning module selects all grid nodes in a subarea, which are called target nodes, and connects the target nodes to form a triangle network, and the first calculation processor calculates the building value Qbt of each side in the triangle according to the following formula:
wherein, pct1 and Pct2 are the central indexes of two grid nodes on the edge, and d is the length of the edge;
The route planning module deletes a connecting line corresponding to the side with the largest construction value in a triangle, when an isolated target node exists, the target node is connected with the rest nearest target nodes, and one side of the other two sides with larger construction values in the newly formed triangle is deleted;
The route planning module selects and connects a plurality of pairs of grid nodes with the distance between adjacent subareas being smaller than a threshold value, and the first calculation processor calculates a communication value Qcn of each pair of grid nodes according to the following formula:
Qcn＝d1·Psb1+d2·Psb2；
Wherein Psb1 is the fitness index of one of the subareas, d 1 is the length of the grid node connection line in the subarea, psb2 is the fitness index of the other subarea, and d 2 is the length of the grid node connection line in the other subarea;
the route planning module reserves the connection line of the pair of power grid nodes with the minimum connection value, and deletes the connection lines of the rest pairs of power grid nodes;
The first information storage pair stores two power grid node information of the transmission route;
further, the power transmission tower location module comprises a second calculation processor and a second information memory, and the second calculation processor calculates the position of the building point according to the following formula:
Wherein (x 1,y1)、(x2,y2) is the coordinates of two grid nodes, (x, y) is the coordinates of the building point, d 0 is the furthest interval distance of the power transmission tower, and k is the serial number of the building point;
The second information memory records and stores the coordinate information of the building point;
Further, the partition calculating processor counts the number Ns of the basic units occupied by each sub-area and the level Le of the profile height interval to which the sub-area belongs, and calculates the suitability index Psb of the sub-area according to the following formula:
Further, the node calculation processor calculates a central index Pct of each grid node according to the following formula:
Wherein a and b respectively represent the length and the width of the whole area, np represents the number of grid nodes, and S A represents the sum of the distances between the grid nodes and other grid nodes;
Further, the terrain analysis module further comprises an input unit, wherein the input unit comprises a data register and a transmission interface, the transmission interface is used for connecting an external device and receiving the terrain data, and the data register is used for storing the received terrain data.
The beneficial effects obtained by the invention are as follows:
According to the system, the whole area is divided into a plurality of sub-areas, each sub-area has a gentle terrain height, then a transmission line is built in each sub-area to connect power grid nodes, a short transmission line is built between adjacent sub-areas to connect power grids of the two sub-areas, the effect of reducing the phenomenon of height difference of adjacent power transmission towers and reducing the amplitude of the height difference is achieved, and when the connection of the power grid nodes in one sub-area is analyzed, the position of the power grid nodes is analyzed, planning is carried out by utilizing a central index, and the total length of the transmission line is reduced.
For a further understanding of the nature and the technical aspects of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the invention.
Drawings
FIG. 1 is a schematic diagram of the overall structural framework of the present invention;
FIG. 2 is a schematic view of a terrain analysis module according to the present invention;
FIG. 3 is a schematic diagram of a power grid node analysis module according to the present invention;
FIG. 4 is a schematic diagram of a route planning module according to the present invention;
Fig. 5 is a schematic diagram of a power transmission tower site selection module according to the present invention.
Detailed Description
The following embodiments of the present invention are described in terms of specific examples, and those skilled in the art will appreciate the advantages and effects of the present invention from the disclosure herein. The invention is capable of other and different embodiments and its several details are capable of modification and variation in various respects, all without departing from the spirit of the present invention. The drawings of the present invention are merely schematic illustrations, and are not intended to be drawn to actual dimensions. The following embodiments will further illustrate the related art content of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
Embodiment one.
The embodiment provides a power grid planning system based on geographic information, which is combined with fig. 1, and comprises a terrain analysis module, a power grid node analysis module, a route planning module and a power transmission tower site selection module, wherein the terrain analysis module is used for processing and analyzing the terrain of a power grid area to be planned, the power grid node analysis module is used for analyzing the distribution of nodes in the area, the route planning module is used for designing a transmission route based on a terrain analysis result and a node analysis result, and the power transmission tower site selection module is used for selecting the construction position of a power transmission tower on the transmission route;
The topography analysis module comprises a topography segmentation processor and a partition calculation processor, the topography segmentation processor divides the whole area into subareas, the partition calculation processor calculates a suitable index for each subarea, the power grid node analysis module comprises a node calculation processor, and the node calculation processor is used for calculating a central index of each power grid node;
The route planning module comprises a first computing processor and a first information memory, wherein the first computing processor is responsible for processing computing tasks, and the first information memory is responsible for storing data required and generated by the computing tasks;
The route planning module selects all grid nodes in a subarea, which are called target nodes, and connects the target nodes to form a triangle network, and the first calculation processor calculates the building value Qbt of each side in the triangle according to the following formula:
wherein, pct1 and Pct2 are the central indexes of two grid nodes on the edge, and d is the length of the edge;
The route planning module deletes a connecting line corresponding to the side with the largest construction value in a triangle, when an isolated target node exists, the target node is connected with the rest nearest target nodes, and one side of the other two sides with larger construction values in the newly formed triangle is deleted;
The route planning module selects and connects a plurality of pairs of grid nodes with the distance between adjacent subareas being smaller than a threshold value, and the first calculation processor calculates a communication value Qcn of each pair of grid nodes according to the following formula:
Qcn＝d1·Psb1+d2·Psb2；
Wherein Psb1 is the fitness index of one of the subareas, d 1 is the length of the grid node connection line in the subarea, psb2 is the fitness index of the other subarea, and d 2 is the length of the grid node connection line in the other subarea;
the route planning module reserves the connection line of the pair of power grid nodes with the minimum connection value, and deletes the connection lines of the rest pairs of power grid nodes;
The first information storage pair stores two power grid node information of the transmission route;
The power transmission tower site selection module comprises a second calculation processor and a second information memory, and the second calculation processor calculates the position of the construction point according to the following formula:
Wherein (x 1,y1)、(x2,y2) is the coordinates of two grid nodes, (x, y) is the coordinates of the building point, d 0 is the furthest interval distance of the power transmission tower, and k is the serial number of the building point;
The second information memory records and stores the coordinate information of the building point;
the partition computing processor counts the number Ns of the basic units occupied by each sub-area and the level Le of the terrain height interval to which the sub-area belongs, and the partition computing processor computes the suitability index Psb of the sub-area according to the following formula:
The node calculation processor calculates a central index Pct of each power grid node according to the following formula:
Wherein a and b respectively represent the length and the width of the whole area, np represents the number of grid nodes, and S A represents the sum of the distances between the grid nodes and other grid nodes;
The terrain analysis module further comprises an input unit, wherein the input unit comprises a data register and a transmission interface, the transmission interface is used for connecting an external device and receiving the terrain data, and the data register is used for storing the received terrain data.
Embodiment two.
The embodiment includes the whole content of the first embodiment, and provides a power grid planning system based on geographic information, which comprises a terrain analysis module, a power grid node analysis module, a route planning module and a power transmission tower location module, wherein the terrain analysis module is used for processing and analyzing the terrain of a power grid area to be planned, the power grid node analysis module is used for analyzing the distribution of nodes in the area, the route planning module is used for designing a transmission route based on a terrain analysis result and a node analysis result, and the power transmission tower location module is used for selecting the construction position of a power transmission tower on the transmission route;
Referring to fig. 2, the terrain analysis module includes an input unit, a terrain segmentation processor, a partition calculation processor and a first transmission unit, where the input unit includes a data register and a transmission interface, the transmission interface is used for connecting an external device and receiving terrain data, the data register is used for storing the received terrain data, the terrain segmentation processor is used for analyzing the received terrain data and segmenting a region corresponding to the terrain data into at least two sub-regions, the partition calculation processor scores each sub-region, and the first transmission unit sends position information and scoring information of each sub-region to the route planning module;
Referring to fig. 3, the power grid node analysis module includes a node extraction unit, a node calculation processor and a second transmission unit, where the node extraction unit extracts position information of all nodes from the topographic data stored in the data register, the node calculation processor scores each node according to a position relationship between the nodes, and the second transmission unit sends the position information and the scoring information of each node to the route planning module;
Referring to fig. 4, the route planning module includes a first calculation processor and a first information memory, where the first calculation processor calculates the received sub-region information and node information to obtain transmission route data, and the first information memory is used to store the data received from the topography analysis module and the grid node analysis module and record transmission route information, and the transmission route information refers to two grid node pairing information;
referring to fig. 5, the power transmission tower location module includes a second calculation processor and a second information memory, where the second calculation processor calculates a building point on a transmission route formed by every two nodes, and the second information memory is used to store position information of the building point;
The process of dividing the whole area into subareas by the terrain dividing processor comprises the following steps:
S1, cutting the whole area into basic units by the terrain segmentation processor, wherein each basic unit is a square area;
s2, calculating the average topography height of each basic unit;
S3, setting a terrain height interval according to the average terrain height statistical data of the basic units;
S4, dividing the basic units which are positioned in the same terrain height interval and have connectivity into areas to obtain subareas;
The process of setting the terrain height interval in the step S3 includes the following steps:
S21, sorting the average topography height data of each basic unit from small to large to obtain a number sequence { h (i) };
s22, calculating a difference value delta h (i) between two adjacent numbers:
Δh(i)＝h(i+1)-h(i)；
s23, selecting the largest (m-1) Δh (i) values, wherein the corresponding i values are respectively marked as i 1,i2,…,im-1;
S24, calculating a section boundary value h j:
S25, setting m relief height intervals: (0, h 1],(h1,h2],…(hm-2,hm-1],(hm-1, ++ infinity a) is provided;
The partition computing processor counts the number Ns of the basic units occupied by each sub-area and the level Le of the terrain height interval of the sub-area, and Le is 1 when the belonging profile height interval is (0, h 1), and the belonging profile height interval is (h m-1, +++) Le is m, the partition calculation processor calculates the suitability index Psb of the sub-region according to the following formula:
It should be noted that the number m of the set relief height intervals is not more than 10;
The node extraction unit in the power grid node analysis module obtains the node coordinates of each power grid node, and marks the node coordinates as (x A,yA), the subscript A is used for representing one node, and the node calculation processor calculates the distance between each power grid node and other power grid nodes and S A:
Wherein B represents a remaining grid node different from a;
The node calculation processor calculates a central index Pct of each power grid node according to the following formula:
A and b respectively represent the length and the width of the whole area, and Np represents the number of grid nodes;
The process of the route planning module for planning the transmission route in a sub-area comprises the following steps:
S31, selecting all grid nodes in the subarea, namely target nodes;
S32, connecting the target nodes to form a triangular network, wherein two connecting lines intersecting with non-target nodes do not exist in the triangular network;
S33, optimizing each triangle in the triangle network, and calculating the building value Qbt of each side in the triangle according to the following formula:
wherein, pct1 and Pct2 are the central indexes of two grid nodes on the edge, and d is the length of the edge;
Deleting a connecting line corresponding to the side with the largest construction value in a triangle;
s34, if an isolated target node exists, connecting the node with the other nearest target nodes, and deleting one of the other two edges with larger building values in the newly formed triangle;
S35, continuously repeating the step S34 until no isolated target node exists;
The process of planning transmission routes between adjacent subareas by the route planning module comprises the following steps:
s41, selecting and connecting a plurality of pairs of grid nodes with the distance between adjacent subareas being smaller than a threshold value, wherein each pair of grid nodes are respectively in two subareas;
S42, calculating a communication value Qcn of each pair of grid nodes according to the following formula:
Qcn＝d1·Psb1+d2·Psb2；
Wherein Psb1 is the fitness index of one of the subareas, d 1 is the length of the grid node connection line in the subarea, psb2 is the fitness index of the other subarea, and d 2 is the length of the grid node connection line in the other subarea;
S43, reserving the connection line of the pair of power grid nodes with the smallest connection value, and deleting the connection lines of the rest pairs of power grid nodes;
the first information storage records and stores all the two power grid nodes with the connection relation;
The power transmission tower addressing module acquires the position information of two power grid nodes of each transmission route from the first information memory, and the second calculation processor calculates the position of the construction point according to the following formula:
Wherein (x 1,y1)、(x2,y2) is the coordinates of two grid nodes, (x, y) is the coordinates of the building point, d 0 is the furthest interval distance of the power transmission tower, and k is the serial number of the building point;
And the second information memory records and stores the coordinate information of the building point.
The foregoing disclosure is only a preferred embodiment of the present invention and is not intended to limit the scope of the invention, so that all equivalent technical changes made by applying the description of the present invention and the accompanying drawings are included in the scope of the present invention, and in addition, elements in the present invention can be updated as the technology develops.
Claims (2)
1. The power grid planning system based on the geographic information is characterized by comprising a terrain analysis module, a power grid node analysis module, a route planning module and a power transmission tower location module, wherein the terrain analysis module is used for processing and analyzing the terrain of a power grid area to be planned, the power grid node analysis module is used for analyzing the distribution of nodes in the area, the route planning module is used for designing a transmission route based on a terrain analysis result and a node analysis result, and the power transmission tower location module is used for selecting the construction position of a power transmission tower on the transmission route;
The topography analysis module comprises a topography segmentation processor and a partition calculation processor, the topography segmentation processor divides the whole area into subareas, the partition calculation processor calculates a suitable index for each subarea, the power grid node analysis module comprises a node calculation processor, and the node calculation processor is used for calculating a central index of each power grid node;
The process of dividing the whole area into subareas by the terrain dividing processor comprises the following steps:
S1, cutting the whole area into basic units by the terrain segmentation processor, wherein each basic unit is a square area;
s2, calculating the average topography height of each basic unit;
S3, setting a terrain height interval according to the average terrain height statistical data of the basic units;
S4, dividing the basic units which are positioned in the same terrain height interval and have connectivity into areas to obtain subareas;
The route planning module comprises a first computing processor and a first information memory, wherein the first computing processor is responsible for processing computing tasks, and the first information memory is responsible for storing data required and generated by the computing tasks;
The route planning module selects all grid nodes in a subarea, which are called target nodes, and connects the target nodes to form a triangle network, and the first calculation processor calculates the building value of each side in the triangle according to the following formula ：
；
Wherein,And/>Central indexes of two power grid nodes on the side,/>, respectivelyIs the length of this edge;
The route planning module deletes a connecting line corresponding to the side with the largest construction value in a triangle, when an isolated target node exists, the target node is connected with the nearest other target nodes, and simultaneously, one side with larger construction value in two newly connected sides in the newly formed triangle is deleted;
The route planning module selects and connects a plurality of pairs of grid nodes with the distance between adjacent subareas being smaller than a threshold value, and the first calculation processor calculates the communication value of each pair of grid nodes according to the following formula ：
；
Wherein,For the suitability index of one of the subregions,/>For the length of the grid node connection in the sub-area,Is the suitability index of another sub-region,/>A length of the connection line of the power grid node in the other subarea;
the route planning module reserves the connection line of the pair of power grid nodes with the minimum connection value, and deletes the connection lines of the rest pairs of power grid nodes;
The first information storage pair stores two power grid node information of the transmission route;
The power transmission tower site selection module comprises a second calculation processor and a second information memory, and the second calculation processor calculates the position of the construction point according to the following formula:
；
Wherein, Coordinates of two grid nodes respectively,/>To build the coordinates of the points,/>K is the serial number of the building point, which is the furthest interval distance of the power transmission tower;
The second information memory records and stores the coordinate information of the building point;
The partition computing processor counts the number of basic units occupied by each sub-area Hierarchy/>, of the profile height interval to which the sub-region belongsThe partition calculation processor calculates the suitability index/>, of the sub-region according to the following formula：
；
The node calculation processor calculates the central index of each power grid node according to the following formula：
；
Wherein a, b represent the length and width of the whole area, respectively,Representing the number of grid nodes,/>Representing the sum of the distances of the grid node from the remaining grid nodes.
2. A geographical information based power grid planning system of claim 1, wherein the topography analysis module further comprises an input unit comprising a data register for connecting to an external device and receiving topography data and a transmission interface for storing the received topography data.
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