CN117113600A - Intelligent conversion method for power grid station wiring diagram - Google Patents

Abstract

The invention discloses an intelligent conversion method for a power grid station wiring diagram, which comprises the following steps: identifying the graphic elements in the power grid station wiring diagram, and outputting the categories, the position rectangular frames and the angles of the graphic elements; identifying a text in a power grid station wiring diagram, and outputting a text character string and a text rectangular box; identifying the connection relation between the connecting lines and the primitives, and outputting the topological relation and the coordinates of the connecting lines between the primitives; matching the primitive with the text; correcting the text based on the association relation between the matched graphic primitive and the text; and (3) laying out the displayable elements in the new wiring diagram, outputting CIM/G files, and finishing intelligent conversion of the wiring diagram of the power grid plant. According to the invention, the power grid station wiring diagram is automatically identified, the topological relation among the graphic elements, the texts, the connecting lines and the graphic elements, the corresponding relation among the graphic elements and the texts and other information are extracted, and the information is automatically converted into the CIM/G format file, so that the time for drawing the power grid station wiring diagram can be greatly reduced, and the working efficiency is improved.

Description

An intelligent conversion method for power grid plant and station wiring diagrams

Technical field

The invention relates to the field of power systems, and in particular to a method for intelligent conversion of power grid plant and station wiring diagrams.

Background technique

For newly put into operation substations, dispatchers need to refer to the original wiring diagram design of the primary power grid station to manually draw the wiring diagram in the power dispatch automation system, manually enter the equipment information and substation monitoring information into the power dispatch automation system database, and complete the substation monitoring The information is bound to the wiring diagram so that dispatchers can monitor it in real time.

At present, dispatching and operation and maintenance personnel need to manually draw CIM/G pictures with reference to the original power grid plant and station wiring diagram design (bmp, jpg, png and other bitmap formats). However, due to the complex graphic style of the wiring diagram and the numerous types of equipment, the maintenance work is cumbersome. At the same time, problems such as missing attributes, association errors, and virtual connections are easily encountered, making manual drawing of wiring diagrams time-consuming and laborious.

Contents of the invention

In view of the above-mentioned deficiencies in the prior art, the present invention provides an intelligent conversion method for power grid station wiring diagrams, which solves the time-consuming and labor-intensive problem of manually drawing wiring diagrams.

In order to achieve the above-mentioned object of the invention, the technical solutions adopted by the present invention are:

An intelligent conversion method for power grid station wiring diagrams is provided, which includes the following steps:

S1. Use the target detection algorithm to identify the graphics elements in the power grid plant station wiring diagram, and output the category, position rectangle and angle of the graphics elements;

S2. Use the OCR algorithm to identify the text in the power grid station wiring diagram, and output text strings and text rectangular boxes; the text includes numbered strings;

S3. Based on the category, position rectangular frame and angle of the primitive, identify the connection relationship between the connection line and the primitive through connected domain analysis, and output the topological relationship and connection line coordinates between the primitives;

S4. Based on the nearest distance matching principle, match primitives and text;

S5. Based on the relationship between the matched graphic elements and the text, correct the numbered string and output the corrected text;

S6. Based on the topological relationship between graphics elements and the connection line coordinates, layout the displayable elements in the new wiring diagram, output the CIM/G file, and complete the intelligent conversion of the power grid plant and station wiring diagram; the displayable elements include graphics primitives, text and connecting lines.

Further, the specific method of step S5 includes the following sub-steps:

S5-1. Use the busbar in the power grid station wiring diagram as the starting point to search for the topology of primitives. When encountering a busbar or main transformer, stop searching downwards and obtain a collection containing primitives, connecting lines and text corresponding to the primitives. and treat each set as an interval;

S5-2. Cluster according to the voltage level of the bus connected to the bay and the type and number of graphics elements in a single bay to obtain similar bays;

S5-3. Obtain the coordinates (x1, y1, x2, y2) of the rectangular frame of any element position in the same interval, and count the minimum value xmin and the minimum value ymin of the ordinate coordinate of the rectangular frame of all element positions in the interval. Use coordinates (xmin, ymin) as the origin, and express the coordinates of the rectangular frame of the element position as relative coordinates (x1-xmin, y1-ymin, x2-xmin, y2-ymin); if two similar intervals are in the same interval, express them as relative coordinates If the position rectangular frames of two similar primitives overlap, then the positions of the two primitives are deemed to be the same;

S5-4. Use the numbered strings corresponding to the graphics elements with the same position in the same interval as the same numbered string. Statistics are made on each position of the same numbered string in the same interval to determine whether there is any character A with a frequency greater than 0.5. , if it exists, the character at this position is determined to be a type character, and character A is determined to be the type character value at this position in the type number string; otherwise, the character at this position is determined to be a named character;

S5-5. For each numbered string, if the value at the type character position is different from the type character value, modify it to the type character value, and obtain the value at the corresponding position based on the named character values of other similar numbered strings. Name the character value, complete the text error correction, and output the corrected text.

Further, in step S5-5, the specific method of obtaining the named character value at the corresponding position based on the named character value of other similar numbered strings includes the following sub-steps:

S5-5-1. Arrange other similar numbered strings into a list TEXT_LIST according to the position of the text box, and obtain the changing rules of named character values;

S5-5-2. For the named character CHAR_A in the numbered string TEXT_A to be corrected, find the named character value CHAR_B of the nearest normally recognized numbered string TEXT_B;

S5-5-3. Get the serial number INDEX_A of the named character TEXT_A in the list TEXT_LIST, and get the serial number INDEX_B of the named character TEXT_B in the list TEXT_LIST;

S5-5-4. When the rule of naming character values is increasing, according to the formula:

CHAR_A＝CHAR_B+(INDEX_A-INDEX_B)

Get the specific value of the named character CHAR_A in the numbered string TEXT_A to be corrected;

When the rule of named character values is decreasing, according to the formula:

CHAR_A＝CHAR_B-(INDEX_A-INDEX_B)

Get the specific value of the named character CHAR_A in the numbered string TEXT_A to be corrected.

Further, the specific method of step S6 includes the following sub-steps:

S6-1. Divide the intervals to obtain different interval types;

S6-2. Lay out the displayable elements of each type of interval;

S6-3. Add telemetry signal display elements to the CIM/G file;

S6-4. Arrange the intervals at a certain distance, and determine the length of the corresponding bus bar according to the total width of the intervals;

S6-5. Organize the intervals connected to the same busbar into sub-areas, take the area where the main transformer is located as a sub-area, combine the sub-areas according to the topological relationship of each sub-area in the original image, obtain the layout image, and output the CIM /G file to complete the intelligent conversion of power grid plant and station wiring diagrams.

Further, the specific method of step S6-2 is:

Use a directed acyclic graph to represent the topological relationship between primitives and connecting lines within the interval, and use a topological sorting algorithm to convert the directed acyclic graph into a one-way linked list;

Traverse the one-way linked list, and replace the current graphic element with the CIM/G standard graphic element while ensuring that the positions of the traversed graphic elements and connecting lines in the one-way linked list remain unchanged; obtain the current graphic element from the directed acyclic graph For an induced subgraph whose element is the source point, adjust the positions of other primitives and connecting lines in the vertex set in the induced subgraph according to the size of the CIM/G standard primitive to ensure that the topological relationship remains unchanged;

Using the collision detection method, the text corresponding to the graphic element is placed in the blank space within the interval, and the text is placed close to its corresponding graphic element.

Further, the specific method of step S6-3 is:

Determine the telemetry value corresponding to the graphic element that needs to be displayed, and add a dynamic text element for display;

If you need to add telemetry values to the bus, place the new elements at both ends of the bus, and adjust the position of the new elements from the two end points of the bus in a direction perpendicular to the bus and away from the bus so that it is not separated from the bus. Some elements overlap;

If you need to add new telemetry values to the main transformer body, place the new elements on the left and right sides of the main transformer body, and adjust the position of the new elements from the left and right sides of the main transformer away from the main transformer so that they are not in line with the main transformer. Overlap of existing elements in the transformer area;

If you need to add new telemetry values to the high/medium/low voltage side windings of the main transformer, place new elements on both sides of the switch in the corresponding interval, and adjust the position of the new elements from both sides of the switch away from the switch so that they Do not overlap with existing elements in the interval; when the switch is placed vertically, the two sides of the switch are the left and right sides; when the switch is placed horizontally, the two sides of the switch are the upper and lower sides;

If you need to add elements to other intervals, add elements in the direction away from the bus in the interval. Starting from the position of the element farthest from the bus in the interval, adjust the position of the new element farther away so that it is not in line with the existing elements in the interval. Some elements overlap.

The beneficial effects of the present invention are: by automatically identifying the power grid plant station wiring diagram, the present invention extracts topological relationships (including interval information) between graphic elements, text, connecting lines, graphic elements, and the correspondence between graphic elements and text, etc. information and automatically converted into CIM/G format files, which can greatly reduce the time of drawing power grid plant and station wiring diagrams and improve work efficiency.

Description of drawings

Figure 1 is a schematic flow chart of this method;

Figure 2 is a partial original design diagram of the power grid plant wiring diagram in the embodiment;

Figure 3 is a schematic diagram of the partial rendering effect of the CIM/G file in the embodiment;

Figure 4 is the original diagram of the interval in the embodiment;

Figure 5 is a schematic diagram of using a directed acyclic graph to represent topological relationships within an interval in an embodiment;

Figure 6 is a schematic diagram of the layout of graphics elements and connecting lines within intervals in the embodiment;

Figure 7 is a schematic diagram of the layout of text within intervals in the embodiment;

Figure 8 is a schematic diagram of the layout of new telemetry signal display elements within intervals in the embodiment;

Figure 9 is a schematic diagram for determining the length of the busbar in the embodiment;

Figure 10 is a schematic diagram of a complete wiring diagram composed of each sub-area in the embodiment.

Detailed ways

The specific embodiments of the present invention are described below to facilitate those skilled in the art to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the technical field, as long as various changes These changes are obvious within the spirit and scope of the invention as defined and determined by the appended claims, and all inventions and creations utilizing the concept of the invention are protected.

As shown in Figure 1, the intelligent conversion method of the power grid station wiring diagram includes the following steps:

S1. Use the target detection algorithm to identify the graphics elements in the power grid plant station wiring diagram, and output the category, position rectangle and angle of the graphics elements;

S2. Use the OCR algorithm to identify the text in the power grid station wiring diagram, and output text strings and text rectangular boxes; the text includes numbered strings;

S3. Based on the category, position rectangular frame and angle of the primitive, identify the connection relationship between the connection line and the primitive through connected domain analysis, and output the topological relationship and connection line coordinates between the primitives;

S4. Based on the nearest distance matching principle, match primitives and text;

S5. Based on the relationship between the matched graphic elements and the text, correct the numbered string and output the corrected text;

S6. Based on the topological relationship between graphics elements and the connection line coordinates, layout the displayable elements in the new wiring diagram, output the CIM/G file, and complete the intelligent conversion of the power grid plant and station wiring diagram; the displayable elements include graphics primitives, text and connecting lines.

The specific method of step S5 includes the following sub-steps:

S5-1. Use the busbar in the power grid station wiring diagram as the starting point to search for the topology of primitives. When encountering a busbar or main transformer, stop searching downwards and obtain a collection containing primitives, connecting lines and text corresponding to the primitives. and treat each set as an interval;

S5-2. Cluster according to the voltage level of the bus connected to the bay and the type and number of graphics elements in a single bay to obtain similar bays;

S5-3. Obtain the coordinates (x1, y1, x2, y2) of the rectangular frame of any element position in the same interval, and count the minimum value xmin and the minimum value ymin of the ordinate coordinate of the rectangular frame of all element positions in the interval. Use coordinates (xmin, ymin) as the origin, and express the coordinates of the rectangular frame of the element position as relative coordinates (x1-xmin, y1-ymin, x2-xmin, y2-ymin); if two similar intervals are in the same interval, express them as relative coordinates If the position rectangular frames of two similar primitives overlap, then the positions of the two primitives are deemed to be the same;

S5-4. Use the numbered strings corresponding to the graphics elements with the same position in the same interval as the same numbered string. Statistics are made on each position of the same numbered string in the same interval to determine whether there is any character A with a frequency greater than 0.5. , if it exists, the character at this position is determined to be a type character, and character A is determined to be the type character value at this position in the type number string; otherwise, the character at this position is determined to be a named character;

S5-5. For each numbered string, if the value at the type character position is different from the type character value, modify it to the type character value, and obtain the value at the corresponding position based on the named character values of other similar numbered strings. Name the character value, complete the text error correction, and output the corrected text.

In step S5-5, the specific method of obtaining the named character value at the corresponding position based on the named character value of other similar numbered strings includes the following sub-steps:

S5-5-1. Arrange other similar numbered strings into a list TEXT_LIST according to the position of the text box, and obtain the changing rules of named character values;

S5-5-2. For the named character CHAR_A in the numbered string TEXT_A to be corrected, find the named character value CHAR_B of the nearest normally recognized numbered string TEXT_B;

S5-5-3. Get the serial number INDEX_A of the named character TEXT_A in the list TEXT_LIST, and get the serial number INDEX_B of the named character TEXT_B in the list TEXT_LIST;

S5-5-4. When the rule of naming character values is increasing, according to the formula:

CHAR_A＝CHAR_B+(INDEX_A-INDEX_B)

Get the specific value of the named character CHAR_A in the numbered string TEXT_A to be corrected;

When the rule of named character values is decreasing, according to the formula:

CHAR_A＝CHAR_B-(INDEX_A-INDEX_B)

Get the specific value of the named character CHAR_A in the numbered string TEXT_A to be corrected.

The specific method of step S6 includes the following sub-steps:

S6-1. Divide the intervals to obtain different interval types;

S6-2. Lay out the displayable elements of each type of interval;

S6-3. Add telemetry signal display elements to the CIM/G file;

S6-4. Arrange the intervals at a certain distance, and determine the length of the corresponding bus bar according to the total width of the intervals;

S6-5. Organize the intervals connected to the same busbar into sub-areas, take the area where the main transformer is located as a sub-area, combine the sub-areas according to the topological relationship of each sub-area in the original image, obtain the layout image, and output the CIM /G file to complete the intelligent conversion of power grid plant and station wiring diagrams.

The specific method of step S6-2 is:

Use a directed acyclic graph to represent the topological relationship between primitives and connecting lines within the interval, and use a topological sorting algorithm to convert the directed acyclic graph into a one-way linked list;

Traverse the one-way linked list, and replace the current graphic element with the CIM/G standard graphic element while ensuring that the positions of the traversed graphic elements and connecting lines in the one-way linked list remain unchanged; obtain the current graphic element from the directed acyclic graph For an induced subgraph whose element is the source point, adjust the positions of other primitives and connecting lines in the vertex set in the induced subgraph according to the size of the CIM/G standard primitive to ensure that the topological relationship remains unchanged;

Using the collision detection method, the text corresponding to the graphic element is placed in the blank space within the interval, and the text is placed close to its corresponding graphic element.

The power grid station wiring diagram uses the text (Text) type to display the telemetry type, such as P (active power value), Q (reactive power value) and I (current value), etc., and uses the dynamic text (DText) type to display the telemetry value. The dynamic text is A special kind of text that changes as the telemetry value changes when the power dispatch automation system is running. Different graphic elements correspond to different telemetry types. For example: the load graphic element needs to display P (active power value), Q (reactive power value) and I (current value), and the capacitor graphic element needs to display Q (reactive power value) and I ( current value). Based on this, the specific method of step S6-3 is:

Determine the telemetry value corresponding to the graphic element that needs to be displayed, and add a dynamic text element for display;

If you need to add telemetry values to the bus, place the new elements at both ends of the bus, and adjust the position of the new elements from the two end points of the bus in a direction perpendicular to the bus and away from the bus so that it is not separated from the bus. Some elements overlap;

If you need to add new telemetry values to the main transformer body, place the new elements on the left and right sides of the main transformer body, and adjust the position of the new elements from the left and right sides of the main transformer away from the main transformer so that they are not in line with the main transformer. Overlap of existing elements in the transformer area;

If you need to add new telemetry values to the high/medium/low voltage side windings of the main transformer, place new elements on both sides of the switch in the corresponding interval, and adjust the position of the new elements from both sides of the switch away from the switch so that they Do not overlap with existing elements in the interval; when the switch is placed vertically, the two sides of the switch are the left and right sides; when the switch is placed horizontally, the two sides of the switch are the upper and lower sides;

If you need to add elements to other intervals, add elements in the direction away from the bus in the interval. Starting from the position of the element farthest from the bus in the interval, adjust the position of the new element farther away so that it is not in line with the existing elements in the interval. Some elements overlap.

In one embodiment of the present invention, the partial design original diagram of the power grid station wiring diagram is shown in Figure 2. After identifying the text in the power grid station wiring diagram through the OCR algorithm, there are two types of numbers in the 10kV load interval. String; Arrange the identified numbering strings in order according to the position of the text box. The numbering list of type A numbering strings is (921,922,923), and the numbering list of type B numbering strings is (92160,192260,92360). By counting each position of the same numbered string in the same interval, it can be obtained that in the Class A numbered string, the first "9" and the second "2" are the type characters, and the third character is the naming character; The first "9", the second "2", the fourth "6" and the fifth "0" in the Class B number string are all type characters, and the third character is the naming character. It can be seen that the second text number 192260 in the Class B number string has a value at the type character position that is different from the type character value, and needs to be corrected; at this time, the type character value obtained by statistics is used as the string to be corrected The character values at the corresponding positions in , that is, the first, second, fourth, and fifth digits of the second text number in the Class B number string are determined to be "9", "2", and "6" respectively. " and "0"; it is found that there is an increasing pattern in the naming characters of Class B numbering strings, and the normal recognition string closest to the numbering string to be corrected is found, that is, the first text number in the Class B numbering string, and its naming characters is 1; enter the formula CHAR_A=CHAR_B+(INDEX_A-INDEX_B)=1+(2-1)=2. Therefore, it is determined that the third digit of the second text number in the Class B number string is "2", that is, the second text number in the Class B number string after error correction is 92260.

In one embodiment of the present invention, the original graph of the interval is shown in Figure 4. A directed acyclic graph is used to represent the topological relationship between the primitives and connecting lines in the interval. The directed acyclic graph is shown in Figure 5 and topological sorting is used. Algorithm, convert a directed acyclic graph into a one-way linked list, one of which is (A, B, C, D, E, F, G, H, I, J); traverse the one-way linked list and process the graph When entering element B, keep the position of the traversed connection line A unchanged, replace element B with the CIM/G standard element, you can see that the size of the replaced element is smaller than the original element; then, from directed acyclic Obtain the induced subgraph with the current primitive B as the source point in the graph. The vertex set of the induced subgraph is (C, D, E, F, G, H, I, J). According to the size of the CIM/G standard primitive , inducing the primitives and connecting lines in the vertex set of the subgraph to move downward as a whole to ensure that the topological relationship of the primitives remains unchanged. The processing effect is shown in Figure 6.

In one embodiment of the present invention, the method of laying out text within the interval is as shown in Figure 7. When placing the text corresponding to the grounding knife gate element, first obtain the center point O1 of the rectangular frame RECT_ICON of the grounding knife gate element, and Horizontal straight line L1 and vertical straight line L2 passing through O1. Then place the center point O2 of the text rectangular frame RECT_TEXT corresponding to the grounding knife gate element at O1, and use a specific stepping distance to make O2 step simultaneously to the left and right ends along L1, and step up and down along L2 at the same time. , until RECT_TEXT does not overlap with existing elements in the interval and maintains a certain distance from RECT_ICON, the automatic layout of the current text is completed. A similar approach can be used when adding new telemetry signals within the interval.

In one embodiment of the present invention, the layout of the newly added telemetry signal display elements is shown in Figure 8. In the figure, a new telemetry signal display element is added to the load element. First find the center point O1 of the rectangular frame RECT_TEXT of the element farthest from the bus in the interval, and the straight line L1 that passes through O1 and is perpendicular to the bus; then place the center point O2 of the dynamic text rectangular frame RECT_DTEXT of the newly added telemetry signal display element at O1 , use a specific step distance to step O2 along L1 in the direction away from the bus until RECT_DTEXT does not coincide with existing elements in the interval and maintains a certain distance from RECT_TEXT, that is, the automatic layout of the current telemetry signal display elements is completed.

In one embodiment of the present invention, the width of the busbar is determined during layout as shown in Figure 9. Arrange the intervals at a distance d, and determine the length of the corresponding bus bar based on the total width of the intervals. The busbars and the connected bays together form subareas.

In one embodiment of the present invention, the complete wiring diagram of each sub-area is shown in Figure 10. The intervals connected to the same busbar are composed of sub-areas, and the area where the main transformer is located is regarded as a sub-area. According to the topological relationship of each sub-area in the original diagram, the sub-areas are combined to form a complete wiring diagram.

After text correction, the displayable elements in the new wiring diagram are laid out, and the CIM/G file is output. The partial rendering of the CIM/G file is shown in Figure 3. After outputting the CIM/G file, relevant personnel only need to proofread it without manually entering each element. Therefore, the time for drawing power grid plant and station wiring diagrams can be greatly reduced and work efficiency improved.

Claims (6)

1. The intelligent conversion method for the power grid station wiring diagram is characterized by comprising the following steps of:

s1, recognizing a graphic element in a power grid station wiring diagram through a target detection algorithm, and outputting the category, the position rectangular frame and the angle of the graphic element;

s2, recognizing texts in the power grid station wiring diagram through an OCR algorithm, and outputting text character strings and text rectangular boxes; wherein the text includes numbered strings;

s3, based on the category, the position rectangular frame and the angle of the primitives, identifying the connection relation between the connecting lines and the primitives through connected domain analysis, and outputting the topological relation and the coordinates of the connecting lines between the primitives;

s4, matching the graphic primitive and the text based on a closest distance matching principle;

s5, correcting the number character strings based on the association relation between the matched graphic primitives and the texts, and outputting the corrected texts;

s6, based on topological relations among the primitives and coordinates of connecting lines, layout is carried out on the displayable elements in the new wiring diagram, CIM/G files are output, and intelligent conversion of the wiring diagram of the power grid plant is completed; wherein the exposable elements include primitives, text, and connecting lines.

2. The intelligent conversion method of a power grid station wiring diagram according to claim 1, wherein the specific method of step S5 comprises the following sub-steps:

s5-1, carrying out topological search of the graphic elements by taking a bus in a wiring diagram of a power grid station as a starting point, stopping downward search when encountering the bus or a main transformer to obtain a set containing the graphic elements, connecting lines and texts corresponding to the graphic elements, and regarding each set as an interval;

s5-2, clustering according to the voltage level of the bus connected with the interval and the types and the number of the primitives in the single interval to obtain the similar interval;

s5-3, acquiring coordinates (x 1, y1, x2, y 2) of rectangular frames at any element position in the same interval, counting minimum values xmin and minimum values ymin of horizontal coordinates and vertical coordinates of rectangular frames at all element positions in the interval, taking the coordinates (xmin and ymin) as an origin, and expressing the coordinates of rectangular frames at the element position as relative coordinates (x 1-xmin, y1-ymin, x2-xmin and y 2-ymin); if the rectangular frames of the positions of the two similar primitives represented by the relative coordinates are overlapped in the two similar intervals, the positions of the two primitives are determined to be the same;

s5-4, taking a numbered character string corresponding to the same-position primitive in the same type interval as a same-type numbered character string, counting each position of the same-type numbered character string in the same type interval, judging whether any character A with the frequency being more than 0.5 exists, judging that the character at the position is a type character if the character A exists, and simultaneously judging that the character A is a type character value at the position in the type numbered character string; otherwise, judging the character at the position as a named character;

s5-5, for each numbered character string, if the value at the position of the type character is different from the type character value, modifying the character string into the type character value, acquiring the named character value at the corresponding position according to the named character values of other similar numbered character strings, completing text error correction, and outputting the text after error correction.

3. The intelligent conversion method of the power grid station wiring diagram according to claim 2, wherein the specific method for acquiring the named character value at the corresponding position according to the named character value of the other similar numbered character strings in the step S5-5 comprises the following sub-steps:

s5-5-1, sequentially arranging other similar numbered character strings into a LIST TEXT_LIST according to the positions of TEXT boxes, and obtaining a change rule of named character values;

s5-5-2, for the named character CHAR_A in the numbered character string TEXT_A to be corrected, finding the named character value CHAR_B of the numbered character string TEXT_B which is nearest to the named character CHAR_A and is normally recognized;

s5-5-3, acquiring a sequence number INDEX_A of a named character TEXT_A in a LIST TEXT_LIST, and acquiring a sequence number INDEX_B of a named character TEXT_B in the LIST TEXT_LIST;

s5-5-4, when the rule of naming the character values is increasing, according to the formula:

CHAR_A＝CHAR_B+(INDEX_A-INDEX_B)

acquiring a specific value of a naming character CHAR_A in a serial number character string TEXT_A to be corrected;

when the rule of naming the character values is decreasing, according to the formula:

CHAR_A＝CHAR_B-(INDEX_A-INDEX_B)

a specific value of the naming character char_a in the numbered string text_a to be error corrected is obtained.

4. The intelligent conversion method of a power grid station wiring diagram according to claim 2, wherein the specific method of step S6 comprises the following sub-steps:

s6-1, dividing the intervals to obtain types of different intervals;

s6-2, laying out the exposable elements of each type of interval;

s6-3, newly adding telemetry signal display elements in the CIM/G file;

s6-4, arranging intervals at a certain interval, and determining the length of the corresponding bus according to the total width of the intervals;

s6-5, forming the intervals connected to the same bus into subareas, taking the area where the main transformer is located as the subarea, combining all the subareas according to the topological relation of all the subareas in the original drawing, obtaining the laid image, outputting CIM/G files, and completing the intelligent conversion of the wiring diagram of the power grid station.

5. The intelligent conversion method of a power grid station wiring diagram according to claim 4, wherein the specific method of step S6-2 is as follows:

using the directed acyclic graph to represent the topological relation between the primitives and the connecting wires in the interval, and adopting a topological sorting algorithm to convert the directed acyclic graph into a unidirectional linked list;

traversing the unidirectional linked list, and replacing the current primitive with the CIM/G standard primitive under the condition of ensuring that the positions of the traversed primitive and the connecting line in the unidirectional linked list are unchanged; acquiring an induced sub-graph taking a current primitive as a source point from the directed acyclic graph, and adjusting the positions of other primitives and connecting lines in a vertex set in the induced sub-graph according to the size of CIM/G standard primitives so as to ensure that the topological relation is unchanged;

and placing the text corresponding to the graphic element in a blank place in the interval by adopting a collision detection method, and enabling the text to be adjacent to the corresponding graphic element.

6. The intelligent conversion method of the power grid station wiring diagram according to claim 4, wherein the specific method of the step S6-3 is as follows:

determining a telemetry value which corresponds to the graphic element and needs to be displayed, and newly adding a dynamic text element for displaying;

if a telemetry value needs to be newly added to the bus, placing new elements at two ends of the bus, and adjusting the positions of the new elements from two end points of the bus to a direction perpendicular to the bus and far away from the bus so that the new elements do not overlap with the existing elements in the bus interval;

if a telemetry value needs to be newly added to the main transformer body, new elements are placed on the left side and the right side of the main transformer body, and the positions of the new elements are adjusted from the left side and the right side of the main transformer to the direction away from the main transformer so that the new elements do not overlap with the existing elements in the main transformer area;

if a telemetry value needs to be newly added to a high/medium/low-voltage side winding of the main transformer, placing newly added elements at two sides of a switch in a corresponding interval, and adjusting the positions of the newly added elements from two sides of the switch to a direction away from the switch so that the newly added elements are not overlapped with the existing elements in the interval; when the switch is vertically placed, the two sides of the switch are left and right sides; when the switch is transversely placed, the two sides of the switch are upper and lower sides;

if the elements need to be newly added to other intervals, the elements are added in the direction away from the bus bar in the intervals, and the positions of the newly added elements are adjusted to be far away from the positions of the elements farthest from the bus bar in the intervals so as not to overlap with the existing elements in the intervals.