Distribution network equipment guarantee power supply reliability evaluation method and system
By combining the line allowable current carrying capacity in the power system, basic information of the substation and contact relationship diagram, the business logic calculates the transfer capacity and generates the optimal load transfer plan, the problem of long and inaccurate generation of the transfer plan in the prior art is solved, and the work efficiency is improved.
Patent Information
- Application Number
- CN202411513247.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-02-25
AI Technical Summary
In power systems, it is difficult for the prior art to generate the optimal load transfer plan quickly and accurately, resulting in team members needing to rely on experience and offline relationship tables to query, which consumes a lot of time and affects work efficiency.
The lines maintained in the system are combined with current carrying capacity, basic information of the substation and line contact diagram, and the line connection diagram are used to calculate the supply capacity of the line, generate a single line, a single bus and a whole station transfer plan, and display the strategy.
It realizes the rapid generation of the optimal supply transfer plan in the event of a failure, saves time, greatly improves work efficiency, and reduces dependence on team members' experience and offline relationship tables.
Smart Images
Figure CN119518706A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of power systems, and in particular to a method and system for evaluating the reliability of power supply of distribution network equipment. Background Art
[0002] In the power system, in order to ensure the stable operation of the power grid and the reliability of power supply, the load transfer capacity of the line needs to be calculated and analyzed. Existing technologies mainly rely on the basic information of the power grid, real-time operation data and load transfer capacity model, and realize the load transfer plan for the line, bus and the whole station through a series of calculations and strategy generation.
[0003] However, in the power industry, there are many distribution lines, and the communication relationship between the lines is complex and bidirectional. Under current circumstances, when a line fails and needs to be transferred, the relevant team can only rely on experience and offline relationship tables to query the load rate of the incoming line and then determine whether the load transfer can be carried out. This not only places high demands on the team members, but also places strict requirements on the timeliness and accuracy of the offline relationship table maintenance. In addition, the team members spend a lot of time judging whether the transfer can be carried out, which seriously affects work efficiency. Summary of the invention
[0004] The purpose of the embodiment of the present invention is to provide a method for evaluating the reliability of power supply of distribution network equipment, which can assist in quickly generating an optimal power supply plan when a fault occurs, save time, and greatly improve work efficiency.
[0005] In order to achieve the above-mentioned purpose, the present invention provides a method for evaluating the reliability of power supply of distribution network equipment on the one hand. The method includes taking the allowable current carrying capacity of the maintenance line in the system and the basic information of the substation to which it belongs as a benchmark, combining the line connection relationship diagram and obtaining the operation data of the relevant business system, using business logic to calculate the optimal line, and generating a single line, a single bus and a whole station transfer plan and displaying the strategy according to the line transfer capacity; wherein the line transfer capacity = line current carrying capacity - real-time current value.
[0006] Preferably, the basic information of the substation includes the operation and maintenance unit, CT ratio, switch number, substation, busbar, line name, line current carrying capacity and main transformer rated capacity.
[0007] Preferably, in the process of establishing the line contact relationship diagram, when establishing the relationship between the outgoing line and the incoming line, a reverse contact relationship will be automatically established according to the incoming line and the outgoing line, and each contact relationship will automatically generate a reverse contact relationship.
[0008] Preferably, the operation data of the relevant business systems obtained include line flow, line active power, line load, main transformer load and main transformer active power.
[0009] Preferably, calculating the optimal route using business logic includes:
[0010] Take the selected outgoing line and current time as input, obtain the incoming lines related to all lines under the substation from the contact relationship, and find the optimal incoming line for solution display and sorting:
[0011] The rule for calculating the optimal route is:
[0012] a. Select the line with the highest transfer capacity: transfer capacity = current carrying capacity - current value;
[0013] b. If the transfer capacity does not differ by more than 10%, the current carrying capacity maintained in the basic information of the incoming line is compared to obtain the one with higher current carrying capacity;
[0014] c. If the current carrying capacity difference does not exceed 10%, the number of low-voltage users maintained in the basic information of the incoming line is taken to obtain the one with the least number of users.
[0015] Preferably, single line load transfer includes:
[0016] According to the selected line, obtain the incoming line related to the line from the contact relationship, and calculate the load of the line after the transfer and the load of the main transformer corresponding to the incoming line according to the formula: (load of the incoming line + load of the outgoing line) / current carrying capacity of the incoming line; find the optimal incoming line according to the three processes of transfer capacity, line allowable current carrying capacity, and number of low-voltage users of the line:
[0017] If the transfer capacity is large, it will be the optimal line. If the transfer capacity difference does not exceed 10%, the line with the larger allowable current carrying capacity will be the optimal line. If the allowable current carrying capacity difference does not exceed 10%, the line with the fewer low-voltage users controlled in the line will be the optimal line.
[0018] The post-transfer strategy is displayed based on the load rate of the incoming line, the substation level, and the main transformer:
[0019] When the load rate of the incoming line after the transfer is greater than 100%, the transfer plan will be displayed as: "optimal, but overloaded after the transfer";
[0020] When there are two or more incoming lines, if there is a 35kV substation, the transfer plan will display: "There is a 35kV substation on the incoming line, not recommended";
[0021] When there are two or more incoming lines and they belong to a 35kV substation, the transfer plan will display: "The transfer line is in a 35kV substation, pay attention to the load rate of the main transformer, and contact the superior dispatcher";
[0022] Find the corresponding main transformer according to the transferred line. If the main transformer is overloaded after the transfer, the transfer plan will display: "The main transformer is overloaded after the transfer, not recommended."
[0023] Preferably, the single bus load transfer is based on the single line load transfer, and the optimal line corresponding to the transfer-out line is obtained. At the same time, it is determined that the transfer-in line and the transfer-out line cannot be the same substation. The transfer plan displays: "line with line".
[0024] Preferably, the load transfer of the entire station is based on the line-to-line result of the single bus load transfer, and the line with the strongest transfer capacity on each bus section is obtained, wherein the transfer capacity = current carrying capacity - current value, and the lines transferred by each bus section cannot be the same bus section of the same substation. The line with the strongest transfer capacity calculated based on this is the optimal line; if the same bus section of the same substation exists, the line with a smaller transfer capacity is modified, and the same bus section of the same substation is excluded first, and then the line with the best transfer capacity is recalculated, and the transfer plan displays: "Transfer to the upper bus".
[0025] On the other hand, the present invention provides a distribution network equipment power supply reliability evaluation system, which is used for the above distribution network equipment power supply reliability evaluation method, and the distribution network equipment power supply reliability evaluation system includes:
[0026] The data processing module is used to calculate the power transfer capacity of the line using business logic based on the allowable current carrying capacity of the maintenance line and the basic information of the substation to which it belongs, combined with the line connection relationship diagram and the operation data of the relevant business system;
[0027] The power transfer plan generation module is used to generate power transfer plans for a single line, a single busbar, and the entire station according to the power transfer capacity of the line;
[0028] The display module is used to display the strategy generated by the transfer plan generation module.
[0029] Through the above technical solution, after the line connection relationship diagram is converted to online maintenance, the team members only need to maintain one line relationship and automatically generate another line relationship, which improves the accuracy of the connection relationship diagram and does not need to maintain multiple line relationships. It supports team members to quickly generate load transfer for a single line, a single bus, and the entire station without querying the load rate of any line, and automatically and quickly generates load transfer plans, improving team work efficiency and saving team work time.
[0030] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:
[0032] Figure 1 It is a flow chart of a method for evaluating the reliability of power supply of distribution network equipment provided by the present invention;
[0033] Figure 2 It is a schematic diagram of a line connection relationship diagram used in a method for evaluating the reliability of power supply of distribution network equipment provided by the present invention;
[0034] Figure 3 It is a structural diagram of a load transfer capability model in a distribution network equipment power supply reliability evaluation method provided by the present invention. DETAILED DESCRIPTION
[0035] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.
[0036] See also Figure 1 The present invention provides a method for evaluating the reliability of power supply of distribution network equipment. The method includes taking the allowable current carrying capacity of the maintenance line in the system and the basic information of the substation to which it belongs as a benchmark, combining the line connection relationship diagram and obtaining the operation data of the relevant business system, using business logic to calculate the transfer capacity of the line, and generating a single line, a single bus and a whole station transfer plan according to the line transfer capacity and displaying the strategy; wherein the transfer capacity of the line = line current carrying capacity - real-time current value.
[0037] In this embodiment, the basic information of the above-mentioned substation includes the operation and maintenance unit, CT ratio, switch number, substation, bus, line name, line current carrying capacity and main transformer rated capacity.
[0038] In the process of establishing the line contact relationship diagram, when establishing the relationship between the outgoing line and the incoming line, a reverse contact relationship will be automatically established based on the incoming line and the outgoing line, and each contact relationship will automatically generate a reverse contact relationship. For example, Figure 2 As shown, when the contact relationship between the outgoing line A and the incoming line B is established, the contact relationship between the outgoing line B and the incoming line A will be automatically generated at the same time, and the same applies to line A and line C.
[0039] In this embodiment, the operation data of the relevant business systems obtained include line flow, line active power, line load, main transformer load and main transformer active power.
[0040] Specifically, using business logic to calculate the optimal route includes:
[0041] Take the selected outgoing line and current time as input, obtain the incoming lines related to all lines under the substation from the contact relationship, and find the optimal incoming line for solution display and sorting:
[0042] The rule for calculating the optimal route is:
[0043] a. Select the line with the highest transfer capacity: transfer capacity = current carrying capacity - current value;
[0044] b. If the transfer capacity differs by no more than 10%, the current carrying capacity maintained in the basic information of the transferred-in line is taken for comparison to obtain the one with the higher current carrying capacity; c. If the current carrying capacity differs by no more than 10%, the number of low-voltage users maintained in the basic information of the transferred-in line is taken to obtain the one with the least number of users.
[0045] In the specific transfer strategy and strategy display, single-line load transfer includes:
[0046] According to the selected line, obtain the incoming line related to the line from the contact relationship, and calculate the load of the line after the transfer and the load of the main transformer corresponding to the incoming line according to the formula: (load of the incoming line + load of the outgoing line) / current carrying capacity of the incoming line; find the optimal incoming line according to the three processes of transfer capacity, line allowable current carrying capacity, and number of low-voltage users of the line:
[0047] If the transfer capacity is large, it will be the optimal line. If the transfer capacity difference does not exceed 10%, the line with the larger allowable current carrying capacity will be the optimal line. If the allowable current carrying capacity difference does not exceed 10%, the line with the fewer low-voltage users controlled in the line will be the optimal line.
[0048] The post-transfer strategy is displayed based on the load rate of the incoming line, the substation level, and the main transformer:
[0049] When the load rate of the incoming line after the transfer is greater than 100%, the transfer plan will be displayed as: "optimal, but overloaded after the transfer";
[0050] When there are two or more incoming lines, if there is a 35kV substation, the transfer plan will display: "There is a 35kV substation on the incoming line, not recommended";
[0051] When there are two or more incoming lines and they belong to a 35kV substation, the transfer plan will display: "The transfer line is in a 35kV substation, pay attention to the load rate of the main transformer, and contact the superior dispatcher";
[0052] Find the corresponding main transformer according to the transferred line. If the main transformer is overloaded after the transfer, the transfer plan will display: "The main transformer is overloaded after the transfer, not recommended."
[0053] Single bus load transfer is based on single line load transfer. The optimal line corresponding to the transfer-out line is obtained. At the same time, it is determined that the transfer-in line and the transfer-out line cannot be the same substation. The transfer plan shows: "Line with line".
[0054] The load transfer of the entire station is based on the line-to-line results of the single bus load transfer, and the line with the strongest transfer capacity on each bus section is obtained, where transfer capacity = current carrying capacity - current value, and the lines transferred by each bus section cannot be the same bus section of the same substation. The line with the strongest transfer capacity is calculated as the optimal line; if the same bus section of the same substation exists, the line with the smaller transfer capacity is modified, and the same bus section of the same substation is excluded first, and then the line with the best transfer capacity is recalculated, and the transfer plan is displayed: "Transfer to the upper bus".
[0055] In addition, in order to facilitate the team members to implement and operate the distribution network equipment power supply reliability evaluation method, and quickly, conveniently and intuitively obtain the final strategy results, the present invention also provides a distribution network equipment power supply reliability evaluation system, which is used to implement the above-mentioned distribution network equipment power supply reliability evaluation method. The distribution network equipment power supply reliability evaluation system includes:
[0056] The data processing module is used to calculate the power transfer capacity of the line using business logic based on the allowable current carrying capacity of the maintenance line and the basic information of the substation to which it belongs, combined with the line connection relationship diagram and the operation data of the relevant business system;
[0057] The power transfer plan generation module is used to generate power transfer plans for a single line, a single busbar, and the entire station according to the power transfer capacity of the line;
[0058] The display module is used to display the strategy generated by the transfer plan generation module.
[0059] The following provides a specific implementation method to illustrate the distribution network equipment power supply reliability evaluation method and system provided by the present invention:
[0060] Step 1: Taking line A as an example, select the transfer line and current time, and click the "Generate Transfer Plan" button;
[0061] Step 2: Obtain the contact relationship data of the outgoing line A, wherein the incoming lines of the outgoing line A include incoming line B, incoming line C, and incoming line D; obtain the data of all lines, including:
[0062] Line ledger information: substation, line current carrying capacity, line name and busbar;
[0063] Substation ledger information: rated capacity of main transformer;
[0064] Business operation data: line flow, line active power, line load, main transformer active power and main transformer load;
[0065] Step 3: Calculate and judge, including:
[0066] Step 3.1, calculate the current load rate of the outgoing line: current / rated current carrying capacity × 100%, and calculate that the current load rate of the incoming line B is 15%, the current load rate of the incoming line C is 15%, and the current load rate of the incoming line D is 55%;
[0067] Step 3.2, calculate the load rate of the main transformer of the incoming line: main transformer transfer load rate = ((incoming main transformer active power + outgoing line active power) / incoming main transformer rated value) × 100%;
[0068] Step 3.3, determine the optimal route:
[0069] Step 3.3.1, calculate the load rate of the outgoing line after transfer: (outgoing line current + incoming line current) / incoming line current carrying capacity. Through calculation, the load rate of incoming line B after transfer is 45%, the load rate of incoming line C after transfer is 45%, and the load rate of incoming line D after transfer is 105%. At this time, incoming line D, as the last one, will no longer participate in the subsequent calculation. However, since the load rates of incoming lines B and C after transfer are the same, they need to participate in the subsequent calculation.
[0070] Step 3.3.2, select the line with the highest transfer capacity: transfer capacity = current carrying capacity - current value;
[0071] After calculation, the transfer capacity of line B is 235, and the transfer capacity of line C is 240. The difference in transfer capacity is less than 10%, so it is necessary to continue the calculation;
[0072] Step 3.3.3, if the difference in transfer capacity between lines does not exceed 10%, the line with higher current carrying capacity will be selected; after comparing the line current carrying capacity, the line current carrying capacity of lines B and C is 400, and the current carrying capacity difference does not exceed 10%, so it is also necessary to compare the number of low-voltage users;
[0073] Step 3.3.4, if the current carrying capacity difference between the lines does not exceed 10%, then take the line with the least number of low-voltage users in the basic information of the incoming line: after comparing the number of low-voltage users, it is found that the number of low-voltage users of line C is smaller, so the optimal line is line C;
[0074] Step 4: Output and display the solution:
[0075] According to the above process results, the intelligent solution is output: the transfer solution of line C is displayed as "optimal", while line B does not display anything, and line D is displayed as "optimal, but overloaded after transfer";
[0076] The above scheme needs to be displayed according to the specific situation, which is mainly divided into the following situations:
[0077] Case 1: If the load rate of the incoming line after the transfer is greater than 100%, the plan will display: "Preferred, but overloaded after the transfer", such as line D;
[0078] Case 2: If the substation to which the outgoing line belongs is not a 35kV substation, and there are two or more incoming lines, the incoming line with a 35kV substation will not be selected; if there is a 35kV substation line, the solution will display: "There is a 35kV substation in the incoming line, not recommended";
[0079] Case 3: If the outgoing line is not a 35kV substation, and the incoming lines are all 35kV substation lines, the plan will display: "The incoming line is powered by the 35kV station, pay attention to the load rate of the main transformer, and contact the superior dispatcher";
[0080] Case 4: If the main transformer of the station to which the transferred line belongs is overloaded, the plan will display: "The main transformer is overloaded after the transfer, not recommended."
[0081] The above method can assist team members in quickly generating the optimal power transfer plan when a line failure occurs, and reduce team members' working hours to 1 / 5 of the original time, greatly improving work efficiency.
[0082] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.
[0083] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.
[0084] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.
[0085] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.
[0086] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.
[0087] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.
[0088] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.
[0089] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.
[0090] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.
Claims
1. A method for evaluating the reliability of power supply of distribution network equipment, characterized in that: The distribution network equipment power supply reliability evaluation method includes taking the allowable current carrying capacity of the maintenance line in the system and the basic information of the substation to which it belongs as a benchmark, combining the line connection relationship diagram and obtaining the operation data of the relevant business system, using business logic to calculate the optimal line, and generating a single line, a single bus and a whole station power supply plan according to the line power supply capacity and displaying the strategy; wherein the power supply capacity of the line = line current carrying capacity - real-time current value.
2. The method for evaluating the reliability of power supply of distribution network equipment according to claim 1, characterized in that: The basic information of the substation includes operation and maintenance unit, CT ratio, switch number, substation, busbar, line name, line current carrying capacity and main transformer rated capacity.
3. The method for evaluating the reliability of power supply of distribution network equipment according to claim 1, characterized in that: In the process of establishing a line contact relationship diagram, when establishing the relationship between the outgoing line and the incoming line, a reverse contact relationship will be automatically established based on the incoming line and the outgoing line, and each contact relationship will automatically generate a reverse contact relationship.
4. The method for evaluating the reliability of power supply of distribution network equipment according to claim 1, characterized in that: The operation data of relevant business systems are obtained, including line flow, line active power, line load, main transformer load and main transformer active power.
5. The method for evaluating the reliability of power supply of distribution network equipment according to claim 1, characterized in that: The calculation of the optimal route using business logic includes taking the selected outgoing route and current time as input, obtaining the incoming routes related to all the routes under the substation from the contact relationship, and finding the optimal incoming route for scheme display and sorting; the rules for calculating the optimal route are: a. Select the line with the highest transfer capacity: transfer capacity = current carrying capacity - current value; b. If the transfer capacity differs by no more than 10%, the current carrying capacity maintained in the basic information of the incoming line is compared to obtain the one with higher current carrying capacity; c. If the current carrying capacity difference does not exceed 10%, the number of low-voltage users maintained in the basic information of the incoming line is taken to obtain the one with the least number of users.
6. The method for evaluating the reliability of power supply of distribution network equipment according to claim 1, characterized in that: Single-line load transfer includes: According to the selected line, obtain the incoming line related to the line from the contact relationship, and calculate the load of the line after the transfer and the load of the main transformer corresponding to the incoming line according to the formula: (load of the incoming line + load of the outgoing line) / current carrying capacity of the incoming line; find the optimal incoming line according to the three processes of transfer capacity, line allowable current carrying capacity, and number of low-voltage users of the line: If the transfer capacity is large, it will be the optimal line. If the transfer capacity difference does not exceed 10%, the line with the larger allowable current carrying capacity will be the optimal line. If the allowable current carrying capacity difference does not exceed 10%, the line with the fewer low-voltage users controlled in the line will be the optimal line. The post-transfer strategy is displayed based on the load rate of the incoming line, the substation level, and the main transformer: When the load rate of the incoming line after the transfer is greater than 100%, the transfer plan will be displayed as: "optimal, but overloaded after the transfer"; When there are two or more incoming lines, if there is a 35kV substation, the transfer plan will display: "There is a 35kV substation in the incoming line, not recommended"; When there are two or more incoming lines and they belong to a 35kV substation, the transfer plan will display: "The transfer line is in a 35kV substation, pay attention to the load rate of the main transformer, and contact the superior dispatcher"; Find the corresponding main transformer according to the transferred line. If the main transformer is overloaded after the transfer, the transfer plan will display: "The main transformer is overloaded after the transfer, not recommended." 7. The method for evaluating the reliability of power supply of distribution network equipment according to claim 6, characterized in that: Single bus load transfer is based on single line load transfer. The optimal line corresponding to the transfer-out line is obtained. At the same time, it is determined that the transfer-in line and the transfer-out line cannot be the same substation. The transfer plan displays: "line with line".
8. The method for evaluating the reliability of power supply of distribution network equipment according to claim 7, characterized in that: The load transfer of the entire station is based on the line-to-line results of the single bus load transfer, and the line with the strongest transfer capacity on each bus section is obtained, where transfer capacity = current carrying capacity - current value, and the lines transferred by each bus section cannot be the same bus section of the same substation. The line with the strongest transfer capacity is calculated as the optimal line; if the same bus section of the same substation exists, the line with the smaller transfer capacity is modified, and the same bus section of the same substation is excluded first, and then the line with the best transfer capacity is recalculated. The transfer plan shows: "Transfer to the upper bus".
9. A distribution network equipment power supply reliability evaluation system, used in the distribution network equipment power supply reliability evaluation method according to any one of claims 1 to 8, characterized in that: The distribution network equipment power supply reliability evaluation system includes: The data processing module is used to calculate the optimal line using business logic based on the allowable current carrying capacity of the maintenance line and the basic information of the substation to which it belongs, combined with the line connection relationship diagram and the operation data of the relevant business system; The power transfer plan generation module is used to generate power transfer plans for a single line, a single busbar, and the entire station according to the power transfer capacity of the line; The display module is used to display the strategy generated by the transfer plan generation module.