CN109858057B - Automatic generation method and system of power distribution single line diagram - Google Patents
Automatic generation method and system of power distribution single line diagram Download PDFInfo
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Abstract
An automatic generation method and system of a power distribution single line diagram, wherein the automatic generation method comprises the following steps: step S1, determining the drawing direction of a power distribution single line diagram and referring to a node O; s2, calculating and determining grid coordinates of all the single line diagram nodes according to the drawing direction of the power distribution single line diagram and the reference node O; then, drawing connecting lines between the nodes of the single line diagram so as to obtain an initial power distribution single line diagram; step S3, performing graph optimization on the initial power distribution single line diagram according to the objective function F to obtain a secondary power distribution single line diagram; and S4, replacing all single line diagram nodes of the secondary power distribution single line diagram by corresponding symbols, so that a final power distribution single line diagram is obtained. The automatic generation method and the system for the power distribution single line diagram are ingenious in design and high in practicability.
Description
Technical Field
The invention relates to the technical field of power grids, in particular to an automatic generation method and system of a power distribution single line diagram.
Background
The distribution single line diagram is one of the most important basic data in the distribution management process, is an important basis for planning, reporting data and counting report forms, and is an important data indispensable in the work of scheduling, running, overhauling, customer service, engineering and the like. The traditional mode generally adopts a drawing tool or CAD to draw a single line diagram, and the management mode has large workload and high technical level requirement on technicians. Due to the differences of technical level, working experience, operation habit and the like among different technicians, drawn single line diagrams are difficult to unify, quality is good and uneven, and unified and standardized management is difficult to achieve. Meanwhile, due to frequent change of the power distribution network, the traditional mode is difficult to ensure that the single line diagram can be updated timely and accurately, so that inconvenience is brought to related management work. For this situation, each electric power network group and related enterprises respectively develop a computer automatic drawing technology of the distribution single line diagram. However, the existing automatic drawing technology can draw only a simple single line drawing. For the existing increasingly complex distribution networks, in particular distribution networks connected in a net shape and in a ring shape, the existing automatic drawing technology is not apprehended. Meanwhile, the existing automatic drawing technology generally only provides a power distribution single line diagram with a drawing direction, and for a power distribution single line diagram with a longer line, a scheme of integrally shrinking the power distribution single line diagram is generally adopted, so that negative effects can be generated on user experience of a technician for viewing drawings.
Disclosure of Invention
Aiming at the problems, the invention provides an automatic generation method and system of a power distribution single line diagram.
The technical scheme of the invention is as follows:
the invention provides an automatic generation method of a power distribution single line diagram, which comprises the following steps:
step S1, determining the drawing direction of a power distribution single line diagram and referring to a node O;
s2, calculating and determining grid coordinates of all the single line diagram nodes according to the drawing direction of the power distribution single line diagram and the reference node O; then, drawing connecting lines between the nodes of the single line diagram so as to obtain an initial power distribution single line diagram; the grid coordinate of the single line diagram node Z is (x, y), and the grid coordinate of the reference node O is (x 0 ，y 0 )，
When the drawing direction of the distribution single line diagram is horizontal, there are:
where n represents the number of paths from the reference node O to the single line diagram node Z;
q i representing the number of nodes on the ith path from the reference node O to the single line diagram node Z;
m represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are identical to the x coordinate of the single line diagram node Z are arranged in descending order according to the number of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same x coordinate as the single line diagram node Z, if the number of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
when the drawing direction of the distribution single line diagram is vertical, there are:
wherein, p represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are the same as the y coordinate of the single line diagram node Z are arranged in descending order according to the quantity of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same y coordinate as the single line diagram node Z, if the quantity of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
step S3, performing graph optimization on the initial power distribution single line diagram according to the objective function F to obtain a secondary power distribution single line diagram; wherein the objective function f=μl+vp; l represents the number of intersections of the initial power distribution single line diagram, μ represents a weight factor of the number of intersections of the initial power distribution single line diagram, P represents the total length of the connecting lines of the initial power distribution single line diagram, and v represents a weight factor of the total length of the connecting lines of the initial power distribution single line diagram;
and S4, replacing all single line diagram nodes of the secondary power distribution single line diagram by corresponding symbols, so that a final power distribution single line diagram is obtained.
In the automatic generation method of the power distribution single line diagram, mu is larger than v and v is larger than 1, the number of intersection points of the initial power distribution single line diagram is the same as the magnitude of the total length of connecting lines of the initial power distribution single line diagram, and the secondary power distribution single line diagram adopts the initial power distribution single line diagram with the minimum objective function F.
In the automatic generation method of the power distribution single line diagram, mu is smaller than v and v is smaller than 1, the number of intersection points of the initial power distribution single line diagram is the same as the magnitude of the total length of connecting lines of the initial power distribution single line diagram, and the secondary power distribution single line diagram adopts the initial power distribution single line diagram with the maximum objective function F.
In the automatic generation method of the power distribution single line diagram, in the step S2, the connecting line adopts a straight line segment; step S3 further includes modifying the connection line represented by oblique lines in the secondary distribution single line diagram to a connection line represented by a broken line composed of a horizontal line and a vertical line.
The invention also provides an automatic generation system of the power distribution single line diagram, which comprises the following steps:
the setting module is used for determining the drawing direction of the distribution single line diagram and referring to the node O;
the calculation module is used for calculating and determining grid coordinates of all the single line diagram nodes according to the drawing direction of the power distribution single line diagram and the reference node O; then, drawing connecting lines between the nodes of the single line diagram so as to obtain an initial power distribution single line diagram; the grid coordinate of the single line diagram node Z is (x, y), and the grid coordinate of the reference node O is (x 0 ，y 0 )，
When the drawing direction of the distribution single line diagram is horizontal, there are:
where n represents the number of paths from the reference node O to the single line diagram node Z;
q i representing the number of nodes on the ith path from the reference node O to the single line diagram node Z;
m represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are identical to the x coordinate of the single line diagram node Z are arranged in descending order according to the number of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same x coordinate as the single line diagram node Z, if the number of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
when the drawing direction of the distribution single line diagram is vertical, there are:
wherein, p represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are the same as the y coordinate of the single line diagram node Z are arranged in descending order according to the quantity of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same y coordinate as the single line diagram node Z, if the quantity of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
the optimization module is used for carrying out graphic optimization on the initial power distribution single line diagram according to the objective function F to obtain a secondary power distribution single line diagram; wherein the objective function f=μl+vp; l represents the number of intersections of the initial power distribution single line diagram, μ represents a weight factor of the number of intersections of the initial power distribution single line diagram, P represents the total length of the connecting lines of the initial power distribution single line diagram, and v represents a weight factor of the total length of the connecting lines of the initial power distribution single line diagram;
and the replacing module is used for replacing all the single line diagram nodes of the secondary power distribution single line diagram by corresponding symbols so as to obtain a final power distribution single line diagram.
In the automatic generation system, mu is larger than v and v is larger than 1, the number of intersection points of the initial power distribution single line diagram is the same as the magnitude of the total length of connecting lines of the initial power distribution single line diagram, and the secondary power distribution single line diagram adopts the initial power distribution single line diagram with the minimum objective function F.
In the automatic generation system, mu is smaller than v and v is smaller than 1, the number of intersection points of the initial power distribution single line diagram is the same as the magnitude of the total length of connecting lines of the initial power distribution single line diagram, and the secondary power distribution single line diagram adopts the initial power distribution single line diagram with the maximum objective function F.
In the automatic generation system, the connecting line used by the calculation module adopts a straight line segment; the optimization module is also used for modifying the connecting line which is represented by oblique lines in the secondary distribution single-line diagram into the connecting line which is represented by a folding line formed by transverse lines and vertical lines.
The invention designs a set of coding algorithm of the grid coordinates of the single line diagram nodes, thereby determining the relative orientation between the single line diagram nodes, and simultaneously designs two algorithms of the distribution single line diagram in the drawing direction. Then, according to the connection condition between the single line diagram nodes, the positions of the single line diagram nodes are adjusted; and finally, determining the final position of the single line diagram node according to the symbol size of the single line diagram node so as to draw a power distribution single line diagram. The invention solves the problems that the existing automatic drawing technology can only draw a simple single line diagram, but can not draw the single line diagram of the power distribution network connected into a net shape and a ring shape. The automatic generation method and the system for the power distribution single line diagram are ingenious in design and high in practicability.
Detailed Description
The technical problems to be solved by the invention are as follows: the existing automatic drawing technology can only draw a simple single line diagram. For the existing increasingly complex distribution networks, in particular distribution networks connected in a net shape and in a ring shape, the existing automatic drawing technology is not apprehended. The technical thought provided by the invention regarding the technical problem is as follows: designing a set of encoding algorithm of the grid coordinates of the single line diagram nodes so as to determine the relative orientation between the single line diagram nodes, and then adjusting the positions of the single line diagram nodes according to the connection condition between the single line diagram nodes; and finally, determining the final position of the single line diagram node according to the symbol size of the single line diagram node so as to draw a power distribution single line diagram.
In order to make the technical objects, technical solutions and technical effects of the present invention more apparent, so as to facilitate understanding and implementation of the present invention by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific examples.
The invention provides an automatic generation method of a power distribution single line diagram, which comprises the following steps:
step S1, determining the drawing direction of a power distribution single line diagram and referring to a node O;
s2, calculating and determining grid coordinates of all the single line diagram nodes according to the drawing direction of the power distribution single line diagram and the reference node O; then, drawing connecting lines between the nodes of the single line diagram so as to obtain an initial power distribution single line diagram; the grid coordinate of the single line diagram node Z is (x, y), and the grid coordinate of the reference node O is (x 0 ，y 0 )，
When the drawing direction of the distribution single line diagram is horizontal, there are:
where n represents the number of paths from the reference node O to the single line diagram node Z;
q i representing the number of nodes on the ith path from the reference node O to the single line diagram node Z;
m represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are identical to the x coordinate of the single line diagram node Z are arranged in descending order according to the number of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same x coordinate as the single line diagram node Z, if the number of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
when the drawing direction of the distribution single line diagram is vertical, there are:
wherein, p represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are the same as the y coordinate of the single line diagram node Z are arranged in descending order according to the quantity of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same y coordinate as the single line diagram node Z, if the quantity of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
in the step, each base tower and the on-pole series equipment (switch, disconnecting link and drop), the on-pole transformer and the capacitor are integrally used as a single line diagram node; the combined equipment such as a switch station, a branch box and the like is used as an independent single line diagram node.
Further, the distribution single line diagram typically employs a substation as reference node O. It will be appreciated that in some special single line diagrams, any base tower or switchyard, branch box may be employed as reference node O.
Step S3, performing graph optimization on the initial power distribution single line diagram according to the objective function F to obtain a secondary power distribution single line diagram; wherein the objective function f=μl+vp; l represents the number of intersections of the initial power distribution single line diagram, μ represents a weight factor of the number of intersections of the initial power distribution single line diagram, P represents the total length of the connecting lines of the initial power distribution single line diagram, and v represents a weight factor of the total length of the connecting lines of the initial power distribution single line diagram;
in this embodiment, μ is much larger than v, and v is larger than 1, and the number of intersections of the initial power distribution single line diagram is the same as the magnitude of the total length of the connecting lines of the initial power distribution single line diagram, and the secondary power distribution single line diagram adopts the initial power distribution single line diagram with the minimum objective function F. For example, μ=1000v, by this arrangement, the secondary distribution single line diagram is made to employ the initial distribution single line diagram having the minimum intersection and the appropriate total length of the connecting lines, and the occurrence of the non-unique distribution single line diagram due to the fact that, in all the single line diagram nodes having the same x-coordinate as the single line diagram node Z, if the number of connecting lines drawn by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are arranged randomly in the queue in step S2 is avoided. It will be appreciated that in other embodiments, μmay be much less than v and v less than 1, the number of intersections of the initial power distribution single line diagram being the same order of magnitude as the total length of the connecting lines of the initial power distribution single line diagram, the secondary power distribution single line diagram employing the initial power distribution single line diagram with the objective function F being the greatest. For example, v=1000 μ, so that the secondary distribution single line diagram can employ the initial distribution single line diagram with the minimum intersection and the proper total length of the connecting lines.
And S4, replacing all single line diagram nodes of the secondary power distribution single line diagram by corresponding symbols, so that a final power distribution single line diagram is obtained.
In this step, each base tower, switch station and branch box has its corresponding symbol. By replacing the single line diagram nodes with symbols, a final distribution single line diagram can be obtained that can be read by those skilled in the art.
Further preferably, in step S2, the connecting line adopts a straight line segment; step S3 further includes modifying the connection line represented by oblique lines in the secondary distribution single line diagram to a connection line represented by a broken line composed of a horizontal line and a vertical line. By using the linear line segments for the connecting lines in the step S2, the connection relation between the single line diagram nodes can be accurately obtained, so that the generation of the secondary power distribution single line diagram is facilitated.
Further, the invention also provides an automatic generation system of the distribution single line diagram, which comprises the following steps:
the setting module is used for determining the drawing direction of the distribution single line diagram and referring to the node O;
the calculation module is used for calculating and determining grid coordinates of all the single line diagram nodes according to the drawing direction of the power distribution single line diagram and the reference node O; then, drawing connecting lines between the nodes of the single line diagram so as to obtain an initial power distribution single line diagram; the grid coordinate of the single line diagram node Z is (x, y), and the grid coordinate of the reference node O is (x 0 ，y 0 )，
When the drawing direction of the distribution single line diagram is horizontal, there are:
where n represents the number of paths from the reference node O to the single line diagram node Z;
q i representing the number of nodes on the ith path from the reference node O to the single line diagram node Z;
m represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are identical to the x coordinate of the single line diagram node Z are arranged in descending order according to the number of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same x coordinate as the single line diagram node Z, if the number of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
when the drawing direction of the distribution single line diagram is vertical, there are:
wherein, p represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are the same as the y coordinate of the single line diagram node Z are arranged in descending order according to the quantity of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same y coordinate as the single line diagram node Z, if the quantity of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
in the step, each base tower and the on-pole series equipment (switch, disconnecting link and drop), the on-pole transformer and the capacitor are integrally used as a single line diagram node; the combined equipment such as a switch station, a branch box and the like is used as an independent single line diagram node.
Further, the distribution single line diagram typically employs a substation as reference node O. It will be appreciated that in some special single line diagrams, any base tower or switchyard, branch box may be employed as reference node O.
The optimization module is used for carrying out graphic optimization on the initial power distribution single line diagram according to the objective function F to obtain a secondary power distribution single line diagram; wherein the objective function f=μl+vp; l represents the number of intersections of the initial power distribution single line diagram, μ represents a weight factor of the number of intersections of the initial power distribution single line diagram, P represents the total length of the connecting lines of the initial power distribution single line diagram, and v represents a weight factor of the total length of the connecting lines of the initial power distribution single line diagram;
in this embodiment, μ is much larger than v, and v is larger than 1, and the number of intersections of the initial power distribution single line diagram is the same as the magnitude of the total length of the connecting lines of the initial power distribution single line diagram, and the secondary power distribution single line diagram adopts the initial power distribution single line diagram with the minimum objective function F. For example, μ=1000v, by this arrangement, the secondary distribution single line diagram is made to employ the initial distribution single line diagram having the minimum intersection and the appropriate total length of the connecting lines, and the occurrence of the non-unique distribution single line diagram due to the fact that, in all the single line diagram nodes having the same x-coordinate as the single line diagram node Z, if the number of connecting lines drawn by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are arranged randomly in the queue in step S2 is avoided. It will be appreciated that in other embodiments, μmay be much less than v and v less than 1, the number of intersections of the initial power distribution single line diagram being the same order of magnitude as the total length of the connecting lines of the initial power distribution single line diagram, the secondary power distribution single line diagram employing the initial power distribution single line diagram with the objective function F being the greatest. For example, v=1000 μ, so that the secondary distribution single line diagram can employ the initial distribution single line diagram with the minimum intersection and the proper total length of the connecting lines.
And the replacing module is used for replacing all the single line diagram nodes of the secondary power distribution single line diagram by corresponding symbols so as to obtain a final power distribution single line diagram.
In this step, each base tower, switch station and branch box has its corresponding symbol. By replacing the single line diagram nodes with symbols, a final distribution single line diagram can be obtained that can be read by those skilled in the art.
Further preferably, the connecting line used by the calculation module adopts a straight line segment; the optimization module is also used for modifying the connecting line which is represented by oblique lines in the secondary distribution single-line diagram into the connecting line which is represented by a folding line formed by transverse lines and vertical lines. The calculation module can accurately obtain the connection relation between the single line diagram nodes by using the straight line segments for the connecting lines, thereby being convenient for the generation of a secondary power distribution single line diagram.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (4)
1. An automatic generation method of a power distribution single line diagram is characterized by comprising the following steps:
step S1, determining the drawing direction of a power distribution single line diagram and referring to a node O;
s2, calculating and determining grid coordinates of all the single line diagram nodes according to the drawing direction of the power distribution single line diagram and the reference node O; then, drawing connecting lines between the nodes of the single line diagram so as to obtain an initial power distribution single line diagram; the grid coordinate of the single line diagram node Z is (x, y), and the grid coordinate of the reference node O is (x 0 ，y 0 )，
When the drawing direction of the distribution single line diagram is horizontal, there are:
where n represents the number of paths from the reference node O to the single line diagram node Z;
q i representing slave reference nodesThe number of nodes on the ith path from O to the single line diagram node Z;
m represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are identical to the x coordinate of the single line diagram node Z are arranged in descending order according to the number of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same x coordinate as the single line diagram node Z, if the number of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
when the drawing direction of the distribution single line diagram is vertical, there are:
wherein, p represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are the same as the y coordinate of the single line diagram node Z are arranged in descending order according to the quantity of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same y coordinate as the single line diagram node Z, if the quantity of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
step S3, performing graph optimization on the initial power distribution single line diagram according to the objective function F to obtain a secondary power distribution single line diagram; wherein the objective function f=μl+vp; l represents the number of intersections of the initial power distribution single line diagram, μ represents a weight factor of the number of intersections of the initial power distribution single line diagram, P represents the total length of the connecting lines of the initial power distribution single line diagram, and v represents a weight factor of the total length of the connecting lines of the initial power distribution single line diagram;
s4, replacing all single line diagram nodes of the secondary power distribution single line diagram by corresponding symbols, so that a final power distribution single line diagram is obtained;
when mu is larger than v and v is larger than 1, the number of intersection points of the initial power distribution single line diagram is the same as the magnitude of the total length of connecting lines of the initial power distribution single line diagram, and the secondary power distribution single line diagram adopts the initial power distribution single line diagram with the minimum objective function F;
when mu is smaller than v and v is smaller than 1, the number of intersection points of the initial distribution single line diagram is the same as the magnitude of the total length of connecting lines of the initial distribution single line diagram, and the secondary distribution single line diagram adopts the initial distribution single line diagram with the largest objective function F.
2. The automatic generation method of a single line diagram for power distribution according to claim 1, wherein in step S2, the connecting line is a straight line segment; step S3 further includes modifying the connection line represented by oblique lines in the secondary distribution single line diagram to a connection line represented by a broken line composed of a horizontal line and a vertical line.
3. An automatic generation system of a single line diagram for power distribution, comprising:
the setting module is used for determining the drawing direction of the distribution single line diagram and referring to the node O;
the calculation module is used for calculating and determining grid coordinates of all the single line diagram nodes according to the drawing direction of the power distribution single line diagram and the reference node O; then, drawing connecting lines between the nodes of the single line diagram so as to obtain an initial power distribution single line diagram; the grid coordinate of the single line diagram node Z is (x, y), and the grid coordinate of the reference node O is (x 0 ，y 0 )，
When the drawing direction of the distribution single line diagram is horizontal, there are:
where n represents the number of paths from the reference node O to the single line diagram node Z;
q i representing the number of nodes on the ith path from the reference node O to the single line diagram node Z;
m represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are identical to the x coordinate of the single line diagram node Z are arranged in descending order according to the number of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same x coordinate as the single line diagram node Z, if the number of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
when the drawing direction of the distribution single line diagram is vertical, there are:
wherein, p represents the ordinal number of the single line diagram node Z in a queue in which all the single line diagram nodes which are the same as the y coordinate of the single line diagram node Z are arranged in descending order according to the quantity of connecting lines led out by the single line diagram node Z; in all the single line diagram nodes with the same y coordinate as the single line diagram node Z, if the quantity of connecting lines led out by each of the plurality of single line diagram nodes is the same, the plurality of single line diagram nodes are randomly arranged in the queue;
the optimization module is used for carrying out graphic optimization on the initial power distribution single line diagram according to the objective function F to obtain a secondary power distribution single line diagram; wherein the objective function f=μl+vp; l represents the number of intersections of the initial power distribution single line diagram, μ represents a weight factor of the number of intersections of the initial power distribution single line diagram, P represents the total length of the connecting lines of the initial power distribution single line diagram, and v represents a weight factor of the total length of the connecting lines of the initial power distribution single line diagram;
the replacing module is used for replacing all single line diagram nodes of the secondary power distribution single line diagram by corresponding symbols so as to obtain a final power distribution single line diagram;
when mu is larger than v and v is larger than 1, the number of intersection points of the initial power distribution single line diagram is the same as the magnitude of the total length of connecting lines of the initial power distribution single line diagram, and the secondary power distribution single line diagram adopts the initial power distribution single line diagram with the minimum objective function F;
when mu is smaller than v and v is smaller than 1, the number of intersection points of the initial distribution single line diagram is the same as the magnitude of the total length of connecting lines of the initial distribution single line diagram, and the secondary distribution single line diagram adopts the initial distribution single line diagram with the largest objective function F.
4. An automatic generation system according to claim 3, wherein the connecting lines used by the calculation module are straight line segments; the optimization module is also used for modifying the connecting line which is represented by oblique lines in the secondary distribution single-line diagram into the connecting line which is represented by a folding line formed by transverse lines and vertical lines.
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