Method and system for automatically forming power grid tidal current diagram

Abstract

The method comprises the following steps: setting a plant station range participating in generation of the tidal current diagram, and automatically generating plant station geographical distribution; if the T connection line is included, a T connection station picture is drawn, a T connection model is established, all line equipment belonging to the same T connection point in the T connection model is collected into the same interval container, and the T connection point is generated; generating a power flow connecting line between the plant stations or between the plant stations and the T contact; and automatically generating power flow measuring points of all tie lines. The invention belongs to the field of power system automation, successfully realizes an automatic power grid tidal current diagram forming method which is based on a power grid panoramic model, integrates multiple technologies such as plant station range assignment, longitude and latitude positioning, T-connection line synchronous generation and multi-layer display, and is suitable for power grids of various levels and complexity.

Description

Technical Field

[0001] The present invention belongs to the field of power system dispatching automation, and more specifically, relates to a method and system for automatically drawing a power grid flow diagram, and in particular to a method and system for automatically drawing a power grid flow diagram that supports conventional double-terminal lines, T-connected lines, and ∏-connected lines. Background Art

[0002] As the "central nervous system" of the power grid, the power grid flow chart is the key monitoring object of the power grid dispatcher. It is also an important reference for adjusting the operation mode of the power grid. It plays a vital role in the daily dispatching and production process of the power grid.

[0003] At present, the power dispatching automation system mainly relies on manual drawing of power flow diagrams. As the "forerunner" of the rapid development of social economy, the power system has undergone tremendous changes in the scale of power grids in recent years. The complexity of power grid structure is getting higher and higher. The generation and daily maintenance of power grid power flow diagrams are becoming more and more complicated and difficult, and have gradually become a major pain point for power dispatching automation operation and maintenance personnel.

[0004] Specifically, the existing manual maintenance method has the following main disadvantages:

[0005] 1. It is necessary to add plants and lines one by one to the screen, which is a huge workload for complex power grids.

[0006] 2. Manual drawing is prone to various operational errors or omissions, such as incorrect plant or line name descriptions, incorrect flow prospect associations, etc.

[0007] 3. It is impossible to accurately grasp the location distribution of power stations in the power flow diagram, which requires operation and maintenance personnel to be very familiar with the actual geographical distribution of all substations.

[0008] 4. After the power grid model is updated, the power flow diagram needs to be manually maintained synchronously, otherwise it will bring the risk of misjudgment to the dispatcher. Summary of the invention

[0009] The present invention is a power grid flow diagram (including T-connection) automatic drawing technology based on the power grid model, the purpose of which is to reduce the adverse effects of the rapid development and increasing complexity of the power grid on the frequent changes in the power dispatching automation diagram model, and effectively reduce the operation and maintenance pressure of automation personnel. Through some automation, precision, and intelligence means, a power grid flow diagram automatic drawing method based on a panoramic power grid model is realized, which integrates multiple technologies such as plant and station range designation, longitude and latitude positioning, T-connection line synchronous generation, and multi-layer display, improves the power grid automation operation and maintenance efficiency, and effectively reduces the operation and maintenance pressure of power grid automation personnel.

[0010] The present invention adopts the following technical solution. A first aspect of the present invention provides a method for automatically drawing a power grid flow diagram, comprising the following steps:

[0011] Step 1: Set the range of plants and stations involved in generating the power flow diagram and automatically generate the geographical distribution of plants and stations;

[0012] Step 2, determine whether the wiring method within the plant range involved in generating the power flow diagram includes T wiring; if it includes T wiring, execute step 3; if it does not include T wiring, jump to step 4;

[0013] Step 3, draw a T-junction station screen and establish a T-junction model. In the T-junction model, all line equipment belonging to the same T-junction are grouped into the same interval container to generate a T-junction;

[0014] Step 4, generating a power flow tie line between the plant and the station or between the plant and the station and the T-junction;

[0015] Step 5: After all power flow tie lines are generated in step 4, the power flow measurement points of all tie lines are automatically generated.

[0016] Preferably, in step 1, according to the range of the plants and stations participating in generating the flow chart, the longitude and latitude information of the substations participating in generating the flow chart is collected, and the longitude and latitude information file of the substation is sorted out according to the four elements of "plant name", "longitude", "latitude" and "plant voltage level".

[0017] Preferably, in step 1, objects are automatically added to corresponding layers according to the different voltage levels of the plant and lines in the substation longitude and latitude information file. When the flow chart is automatically drawn, multiple layers are automatically created according to the voltage level of the object to be generated, and they are automatically added to the corresponding layers.

[0018] Preferably, in step 1, two substations are selected from the substation latitude and longitude information file as the first endpoint and the second endpoint respectively;

[0019] Referring to the actual geographical locations of the two substations, drag and drop the substation graphics to the corresponding positions on the screen, and record the screen coordinates of the first endpoint and the second endpoint respectively, and define the actual screen coordinates and longitude and latitude information of the conversion reference point;

[0020] All other substations except the first and second endpoints defined in the longitude and latitude information file of the substation are automatically generated to the specified position of the corresponding layer on the screen according to the voltage level.

[0021] Preferably, drawing a substation primary plant diagram further includes:

[0022] (1) The plant type should be defined according to actual conditions;

[0023] (2) Plant voltage level, defined as the highest voltage level of the substation;

[0024] (3) If the incoming and outgoing lines are interconnected with other substations or power plants, the element type should be Line.

[0025] (4) For the names of double-ended line equipment, the same dispatching number shall be used for naming at both substations;

[0026] (5) The name of the T-connected line or ∏-connected line equipment should be named as “XX line X branch line”.

[0027] Preferably, in step 3, when there are only T-connected lines in the power grid, all T-connected lines are drawn into a T-connected station screen; when there are ∏-connected lines in the power grid, they can be split into multiple T-connected lines and drawn into different T-connected station screens respectively, and the database filling modeling is performed to obtain the T-connected model;

[0028] T-junction points are automatically generated according to all T-junction intervals of the T-junction station in the T-junction model.

[0029] Preferably, in step 4, for a double-ended line, the same equipment name is used in the substations on both sides, and when it is identified that there are only two lines with the same name in the entire power grid model, they are automatically generated as power flow tie lines between the two substations;

[0030] For T-connected lines, the power flow connection line between the T-connection point and the opposite plant station, or between the T-connection stations, is automatically generated, and the corresponding voltage level layer is added;

[0031] For the ∏ connection line, multiple T-connections are generated accordingly. If there are lines with the same name in two T-connection intervals, a power flow tie line is generated between the two T-connections using this line.

[0032] Preferably, drawing a T-connection picture further includes:

[0033] (1) The plant type is defined as "T-junction plant";

[0034] (2) The plant voltage level is defined as the highest voltage level of the T connection in the screen;

[0035] (3) The lines belonging to the same T-junction are electrically connected together, and the same T-junction interval name is customized, taking "line name + T";

[0036] (4) For lines with ∏-type connection, it is necessary to split them into multiple T-connection lines and draw them separately on different T-connection station screens. The names of the T-connection intervals are distinguished by adding numerical serial numbers based on the conventional T-connection.

[0037] Preferably, the T-contact automatic generation rules include:

[0038] (1) If there is a conventional plant on the opposite side of a line under the T-connection interval, the T-connection point is placed at a specified distance to the right of the plant;

[0039] (2) If there are two lines with a conventional power plant on the opposite side of the T-connection interval, the T-connection point is placed in the middle of the line connecting the two power plants;

[0040] (3) If there are three lines with conventional power plants on the opposite side of the T-connection interval, the T-connection point is placed at the center of the triangle where these three power plants are located;

[0041] (4) If there are more than three line pairs under the T-connection interval, it is a conventional plant station, and the T-connection point is placed at the center of the polygon formed by all the opposite-side plants and stations.

[0042] Preferably, in step 5, after all power flow tie lines are generated, the power flow measurement points of all tie lines are automatically generated, and only active power is generated, or both active power and reactive power are generated simultaneously.

[0043] Preferably, after completing the input of plant screen coordinates and longitude and latitude conversion information, the creation of longitude and latitude information files, the selection of whether to automatically add layers, the selection of whether to simultaneously create a flow foreground and other related parameter configurations, the automatic drawing of the entire power grid flow diagram can be completed with one click.

[0044] A second aspect of the present invention provides a system for automatically drawing a power grid flow diagram, and the system runs the method for automatically drawing a power grid flow diagram, including:

[0045] Geographical collection module: used to set the range of plants and stations involved in generating the tidal flow chart and collect the geographical distribution of plants and stations;

[0046] Visualization module: used to operate graphic elements, display power stations, T-junctions, power flow lines and power flow measurement points;

[0047] T-connection generation module: used to establish a T-connection model, in which all line devices belonging to the same T-connection are grouped into the same interval container;

[0048] Parameter configuration module: used for related parameter configuration, including: input of plant screen coordinates and longitude and latitude conversion information, preparation of longitude and latitude information files, selection of whether to automatically add layers, and selection of whether to simultaneously create a tidal foreground.

[0049] The method of the present invention is used to realize the automatic drawing function of the power grid flow diagram. Compared with the prior art, the present invention successfully realizes a power grid flow diagram automatic drawing method based on a panoramic power grid model, integrating multiple technologies such as plant and station range designation, longitude and latitude positioning, T-connected line synchronous generation, and multi-layer display, which is suitable for power grids of various levels and complexities. It has made progress from relying on manual drawing to automatic drawing, and has achieved the effect of automatic drawing or updating of the flow diagram according to the changes in the power grid model, saving the operation and maintenance time of power grid automation personnel, and improving the operation and maintenance efficiency of power system dispatching automation, which has extremely high application and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is an overall flow chart of automatic drawing of a tidal current diagram provided in accordance with an embodiment of the present invention;

[0051] Figure 2 It is a flow chart for automatically generating T-connection of a power flow diagram according to an embodiment of the present invention;

[0052] Figure 3 It is a schematic diagram of the definition of the longitude and latitude information of the reference point coordinates provided in accordance with an embodiment of the present invention;

[0053] Figure 4 It is a schematic diagram of defining the same interval name for the same T-contact line according to an embodiment of the present invention;

[0054] Figure 5 is a schematic diagram of an example of generating a T-junction of a power flow diagram according to an embodiment of the present invention;

[0055] Figure 6 is a schematic diagram of an example of generating a double-ended line of a power flow diagram according to an embodiment of the present invention;

[0056] Figure 7 is a schematic diagram of an example of generating a T-connection line of a power flow diagram according to an embodiment of the present invention;

[0057] Figure 8 It is a schematic diagram of an example of generating a power flow diagram connection line according to an embodiment of the present invention;

[0058] Fig. 9 According to the embodiment of the present invention, the current Figure 1 Schematic diagram of the bond mapping parameter configuration. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0060] It is worth noting that, given the increasingly complex structure of power grids, continuing to rely entirely on manual drawing of power flow diagrams not only requires a large amount of drawing work and is difficult to maintain, but is also prone to errors and cannot keep up with the development of the power grid. The research and application of automatic power flow diagram drawing technology is an inevitable choice for the development of the times.

[0061] To improve the automation, precision and practicality of the automatic generation of power flow diagrams, it is necessary to consider each feature of the power grid and propose solutions. For example, but not limited to, for different levels of power grids, it is necessary to specify the scope of substations participating in the automatic generation of power flow diagrams, and accurately import the plant and station graphics required to participate in the generation of power flow diagrams in combination with the longitude and latitude information of the plant and station; for different densities of substations (power plants), the power flow diagram must be able to support manual secondary adjustments to the layout of the screen, and ensure that the power flow diagram is not restored in the subsequent update process; for different power grid complexities, it is necessary to realize the automatic and synchronous generation of T-type wiring and ∏-type wiring.

[0062] In order to solve the above technical problems and facilitate the display of power flow diagrams of different voltage levels individually or in combination, the present invention also introduces multi-layer processing technology when generating power flow diagrams, supports automatic creation of corresponding voltage level layers according to different voltage levels of power plants and lines, and adds all power plants and power flow lines to corresponding layers according to voltage levels. When power plants, lines, etc. in the model are deleted or renamed, the automatic update of the power flow diagram can also be triggered.

[0063] For the relatively complex automatic drawing of power grid flow diagrams, the automatic drawing method of power grid flow diagrams provided by the present invention can be completed with one click in terms of operation, but in terms of the internal processing logic of the program, it actually includes multiple steps such as generating the geographical distribution of power plants and stations, generating T-junctions, generating flow connection lines, generating power flow (measurement points), etc. The following introduces the outstanding essential features of the present invention and the significant progress it brings by way of embodiments. The overall process of the automatic drawing principle of the flow diagram is shown in the attached Figure 1 , the flow chart of the automatic generation principle of T-connection in the power flow diagram is attached Figure 2 .

[0064] like Figure 1 As shown, embodiment 1 of the present invention provides a method for automatically drawing a power grid flow diagram, comprising the following steps:

[0065] Step 1: Set the range of plants and stations involved in generating the tidal flow diagram and automatically generate the geographical distribution of the plants and stations.

[0066] In a preferred but non-limiting embodiment of the present invention, the geographical distribution of the power plant is automatically generated according to the set power plant range and in combination with the longitude and latitude information of the substation.

[0067] It is worth noting that in the process of automatically drawing the power flow diagram, it is necessary to ensure the accuracy of the position of each substation generated in the picture, so it is necessary to ensure that the collected longitude and latitude information is accurate. Preferably, the longitude and latitude information of the substation can be obtained through the power grid company.

[0068] Furthermore, according to the range of plants and stations involved in generating the flow chart, the longitude and latitude information of the substations involved in generating the flow chart is collected, and the longitude and latitude information of the substations is sorted out according to the four elements of "plant name", "longitude", "latitude" and "plant voltage level" to generate a substation longitude and latitude information file, preferably but not limited to, in csv format, as shown in Appendix 1.

[0069] Appendix 1: Substation longitude and latitude information

[0070]

[0071] To establish the conversion relationship between longitude and latitude and screen coordinates, preferably, but not limited to, two substations with the largest possible difference in longitude and latitude are selected as the first endpoint and the second endpoint, respectively, for establishing the conversion relationship. More specifically, referring to the actual geographical locations of the two substations, the substation graphics are dragged and dropped to the corresponding positions on the screen, and the screen coordinates of the first endpoint and the second endpoint are recorded respectively, and then the actual screen coordinates and longitude and latitude information of the conversion reference point are defined, as shown in the attached figure. Figure 3 shown.

[0072] In the subsequent execution flow Figure 1 When drawing, the program will automatically import the sorted substation longitude and latitude information file. Based on the conversion relationship between the screen coordinates and the longitude and latitude, the program will automatically generate all other substations except the first and second endpoints defined in the file to the specified position of the corresponding layer on the screen according to the voltage level.

[0073] In a preferred but non-limiting embodiment of the present invention, drawing a substation primary plant diagram further includes:

[0074] (1) The plant type should be defined according to actual conditions, such as but not limited to substation, thermal power plant, hydropower plant, etc.

[0075] (2) Plant voltage level, defined as the highest voltage level of the substation.

[0076] (3) If the incoming and outgoing lines are connecting lines with other substations or power plants, the element type should be line.

[0077] (4) For the names of double-ended line equipment, the same dispatching number shall be used for naming at both substations.

[0078] (5) The names of the equipment in T-connected lines or ∏-connected lines shall be uniformly named as "XX line X branch line". For example, but not limited to, the T-connected "XX line" connects station A, station B, and station C at the same time. The equipment names used in the three plant-station diagrams for this line are: XX line A branch line, XX line B branch line, and XX line C branch line.

[0079] In a preferred but non-limiting embodiment of the present invention, layers are introduced, and objects are automatically added to corresponding layers according to the different voltage levels of plants and lines. When the power flow diagram is automatically drawn, multiple layers are automatically created according to the voltage level of the object to be generated, and the objects are automatically added to the corresponding layers. The power flow diagrams of different voltage levels can be displayed separately or in combination, including the option of displaying a power flow diagram of a specified single voltage level, or the option of displaying power flow diagrams of multiple voltage levels at the same time.

[0080] Step 2, determine whether the wiring method within the plant range involved in generating the power flow diagram includes T wiring; if it includes T wiring, execute step 3; if it does not include T wiring, jump to step 4.

[0081] Step 3, draw the T-junction station screen and establish a T-junction model. In the T-junction model, all line equipment belonging to the same T-junction are grouped into the same interval container to generate a T-junction.

[0082] Specifically, when there are T-connected or ∏-connected lines in the power flow diagram to be generated, it is necessary to generate a T-connection point first, which is equivalent to a virtual plant station, so that the program can automatically generate power flow connection lines according to all plants stations and T-connections.

[0083] To generate a T-junction, it is necessary to group all the line equipment belonging to the same T-junction into the same interval container in the model so that the program can automatically identify the T-junction and the corresponding T-connected line. Therefore, when there is a T-connection or ∏-connection line in the power grid, it is necessary to draw a T-junction station screen and establish a T-connection model by filling in the database.

[0084] When there are only T-connected lines in the power grid, all T-connected lines can be drawn into a T-connection station screen, for example but not limited to, named "T1 connection station"; when there are ∏-connected lines in the power grid, they can be split into multiple T-connected lines and drawn into different T-connection station screens respectively, and database filling modeling can be performed, such as naming "T1 connection station", "T2 connection station", "T3 connection station", etc.

[0085] It is worth noting that when drawing a T-wiring screen, all line devices belonging to the same T-connection point need to define the same T-connection interval name. Specifically, drawing a T-wiring screen includes:

[0086] (1) The plant type should be defined as "T-junction plant".

[0087] (2) Plant voltage level: define the highest voltage level of the T connection in this screen.

[0088] (3) For the lines with the same T-connection point, they must be electrically connected together and the same T-connection interval name can be customized, which can be "line name + T". For example, but not limited to, for the T-connection "XX line", its T-connection interval is named "XX line T", as shown in the attached figure. Figure 4 shown.

[0089] (4) For lines belonging to ∏-type wiring, it is necessary to split them into multiple T-connection lines and draw them separately in different T-connection screens. The names of T-connection intervals are distinguished by adding numerical serial numbers based on the conventional T-connection. For example, but not limited to, a certain ∏-type wiring "XX line" is split into three T-connections and drawn to T1 connection station, T2 connection station, and T3 connection station respectively. Then, the names of the T-connection intervals in the three T-connection screens should be named "XX line T1", "XX line T2", and "XX line T3" respectively.

[0090] After the T-connection model is created, the program automatically generates T-connections based on all T-connection intervals of the T-connection station. The generated position needs to refer to the screen coordinates of the conventional plant station (non-virtual plant station, T-connection station) on the opposite side of the T-connection line, and supports manual adjustment. The automatic generation rules of T-connections include:

[0091] (1) If there is a conventional plant on the opposite side of a line under the T-connection interval, the T-connection point is placed at a specified distance to the right of the plant;

[0092] (2) If there are two lines with a conventional power plant on the opposite side of the T-connection interval, the T-connection point is placed in the middle of the line connecting the two power plants;

[0093] (3) If there are three lines with conventional power plants on the opposite side of the T-connection interval, the T-connection point is placed at the center of the triangle where these three power plants are located;

[0094] (4) If there are more than three line pairs under the T-connection interval, it is a conventional plant station, and the T-connection point is placed at the center of the polygon formed by all the opposite-side plants and stations.

[0095] like Figure 5 As shown, it shows the situation where there are 3 lines with conventional power stations on the opposite side under the T-connection interval, and the generation effect of the T-connection.

[0096] Step 4: Generate a power flow tie line between plants and stations or between plants and stations and T-junctions.

[0097] Specifically, as the primary equipment for transmitting electric energy between substations or power plants, the line is a key component of the power flow diagram. It can be divided into double-ended lines, T-connected lines and ∏-connected lines, among which the ∏-connected line can be regarded as a combination of multiple T-connected lines.

[0098] For double-terminal lines, the same equipment name is usually used in the substations on both sides. When the program recognizes that there are only two lines with the same name in the entire power grid model, it will automatically generate them as power flow tie lines between the two substations and add the corresponding voltage level layer, as shown in the attached figure. Figure 6 shown.

[0099] For T-connected lines, the flow connection line between the T-connection point and the opposite plant station, or between the T-connection stations, is automatically generated, and the corresponding voltage level layer is added.

[0100] For the case where there are three lines with conventional power plants on the opposite side under the T-connection interval, the generation effect of the T-connection power flow tie line is shown in the attached figure. Figure 7 As shown:

[0101] For the ∏ connection line, because it needs to be split into 2 or more T connection intervals for modeling, multiple T connection points will be generated accordingly. The connection lines between T connection points follow: if there are lines with the same name in two T connection intervals, the flow connection line is generated between the two T connection points based on this line. The generation effect of the ∏ connection line is shown in the attached figure. Figure 8 shown.

[0102] Step 5: After all power flow tie lines are generated, the power flow measurement points of all tie lines are automatically generated.

[0103] Specifically, after all power flow tie lines are generated, the power flow measurement points of all tie lines are automatically generated, such as but not limited to active power, reactive power, etc.; preferably, only active power is generated, or active power and reactive power are generated simultaneously.

[0104] In a preferred but non-limiting embodiment of the present invention, the automatic drawing function of the power flow diagram is implemented. After completing the input of the plant screen coordinates and the longitude and latitude conversion information, the longitude and latitude information file preparation, the selection of whether to automatically add the layer, the selection of whether to simultaneously create the power flow foreground and other related parameter configurations, the automatic drawing of the entire power grid power flow diagram can be completed quickly with one click. The parameter configuration is shown in the attached Fig. 9 shown.

[0105] Embodiment 2 of the present invention provides a system for automatically drawing a power grid flow diagram, and runs a method for automatically drawing a power grid flow diagram described in embodiment 1, including:

[0106] Geographical collection module: used to set the range of plants and stations involved in generating the tidal flow chart and collect the geographical distribution of plants and stations;

[0107] Visualization module: used to operate graphic elements, display power stations, T-junctions, power flow lines and power flow measurement points;

[0108] T-connection generation module: used to establish a T-connection model, in which all line devices belonging to the same T-connection are grouped into the same interval container;

[0109] Parameter configuration module: used for related parameter configuration, including: input of plant screen coordinates and longitude and latitude conversion information, preparation of longitude and latitude information files, selection of whether to automatically add layers, and selection of whether to simultaneously create a tidal foreground.

[0110] The present disclosure may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for automatically drawing a power grid flow diagram, characterized in that: The following steps are involved: Step 1: Set the range of plants and stations involved in generating the power flow diagram and automatically generate the geographical distribution of plants and stations; Step 2, determine whether the wiring method within the plant range involved in generating the power flow diagram includes T wiring; if it includes T wiring, execute step 3; if it does not include T wiring, jump to step 4; Step 3, draw a T-junction station screen and establish a T-junction model. In the T-junction model, all line equipment belonging to the same T-junction are grouped into the same interval container to generate a T-junction; Step 4, generating a power flow tie line between the plant and the station or between the plant and the station and the T-junction; Step 5: After all power flow tie lines are generated in step 4, the power flow measurement points of all tie lines are automatically generated.

2. A method for automatically drawing a power grid flow diagram according to claim 1, characterized in that: In step 1, according to the range of plants and stations involved in generating the power flow diagram, the longitude and latitude information of the substations involved in generating the power flow diagram is collected, and the longitude and latitude information file of the substation is sorted out according to the four elements of "plant name", "longitude", "latitude" and "plant voltage level".

3. A method for automatically drawing a power grid flow diagram according to claim 2, characterized in that: In step 1, objects are automatically added to corresponding layers according to the different voltage levels of the substation and lines in the longitude and latitude information file of the substation. When the power flow chart is automatically generated, multiple layers are automatically created according to the voltage level of the object to be generated, and they are automatically added to the corresponding layers.

4. A method for automatically drawing a power grid flow diagram according to claim 2 or 3, characterized in that: In step 1, two substations are selected in the substation latitude and longitude information file as the first endpoint and the second endpoint respectively; Referring to the actual geographical locations of the two substations, drag and drop the substation graphics to the corresponding positions on the screen, and record the screen coordinates of the first endpoint and the second endpoint respectively, and define the actual screen coordinates and longitude and latitude information of the conversion reference point; All other substations except the first and second endpoints defined in the longitude and latitude information file of the substation are automatically generated to the specified position of the corresponding layer on the screen according to the voltage level.

5. A method for automatically drawing a power grid flow diagram according to claim 2 or 3, characterized in that: Drawing the primary plant diagram of the substation further includes: (1) The plant type is defined according to actual conditions; (2) Plant voltage level, defined as the highest voltage level of the substation; (3) If the incoming and outgoing lines are interconnected with other substations or power plants, the element type should be Line. (4) For the names of double-ended line equipment, the same dispatching number is used for naming at both substations; (5) The name of the T-connected line or ∏-connected line equipment should be named as "XX line X branch line".

6. The method for automatically drawing a power grid flow diagram according to claim 1, characterized in that: In step 3, when there are only T-connected lines in the power grid, all T-connected lines are drawn into a T-connected station screen; when there are ∏-connected lines in the power grid, they can be split into multiple T-connected lines and drawn into different T-connected station screens respectively, and the database filling modeling is performed to obtain the T-connected model; T-junction points are automatically generated according to all T-junction intervals of the T-junction station in the T-junction model.

7. A method for automatically drawing a power grid flow diagram according to claim 6, characterized in that: In step 4, for double-ended lines, the same equipment name is used in the substations on both sides. When it is recognized that there are only two lines with the same name in the entire power grid model, they are automatically generated as power flow tie lines between the two substations. For T-connected lines, the power flow connection line between the T-connection point and the opposite plant station, or between the T-connection stations, is automatically generated, and the corresponding voltage level layer is added; For the ∏ connection line, multiple T-connections are generated accordingly. If there are lines with the same name in two T-connection intervals, a power flow tie line is generated between the two T-connections using this line.

8. A method for automatically drawing a power grid power flow diagram according to claim 6 or 7, characterized in that: The T wiring drawing screen further includes: (1) The plant type is defined as "T connection station"; (2) The plant voltage level is defined as the highest voltage level of the T connection in the screen; (3) The lines belonging to the same T-connection are electrically connected together, and the same T-connection interval name is customized, taking "line name + T"; (4) For lines with ∏-type connection, it is necessary to split them into multiple T-connection lines and draw them separately on different T-connection station screens. The names of the T-connection intervals are distinguished by adding numerical serial numbers based on the conventional T-connection.

9. A method for automatically drawing a power grid power flow diagram according to claim 6 or 7, characterized in that: The T-contact automatic generation rules include: (1) If there is a conventional plant on the opposite side of a line under the T-connection interval, the T-connection point is placed at a specified distance to the right of the plant; (2) If there are two lines with a conventional power plant on the opposite side of the T-connection interval, the T-connection point is placed in the middle of the line connecting the two power plants; (3) If there are three lines with conventional power plants on the opposite side of the T-connection interval, the T-connection point is placed at the center of the triangle where these three power plants are located; (4) If there are more than three line pairs under the T-connection interval, it is a conventional plant station, and the T-connection point is placed at the center of the polygon formed by all the opposite-side plants and stations.

10. The method for automatically drawing a power grid flow diagram according to claim 1, characterized in that: In step 5, after all the power flow tie lines are generated, the power flow measurement points of all tie lines are automatically generated, and only active power is generated, or active power and reactive power are generated at the same time.

11. A method for automatically drawing a power grid power flow diagram according to any one of claims 1 to 3, characterized in that: After completing the input of plant screen coordinates and longitude and latitude conversion information, the creation of longitude and latitude information files, selecting whether to automatically add layers, selecting whether to simultaneously create a flow foreground and other related parameter configurations, the entire power grid flow diagram can be automatically drawn with one click.

12. A power grid flow diagram automatic drawing system, running a power grid flow diagram automatic drawing method according to any one of claims 1 to 11, characterized in that: include: Geographical collection module: used to set the range of plants and stations involved in generating the tidal flow chart and collect the geographical distribution of plants and stations; Visualization module: used to operate graphic elements, display power stations, T-junctions, power flow lines and power flow measurement points; T-connection generation module: used to establish a T-connection model, in which all line devices belonging to the same T-connection are grouped into the same interval container; Parameter configuration module: used for related parameter configuration, including: input of plant screen coordinates and longitude and latitude conversion information, preparation of longitude and latitude information files, selection of whether to automatically add layers, and selection of whether to simultaneously create a tidal foreground.

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