Load transfer method, device, equipment, medium and product for completely stopped transformer substation

Abstract

This disclosure provides a load transfer method, apparatus, equipment, medium, and product for a completely shut-down substation. The method includes: acquiring the topology model, distribution network line connections, and power flow section information of the fault-side completely shut-down substation; the power flow section information includes the power flow section information of the fault-side completely shut-down substation and the transfer-side substation within a preset time period; determining the set of transfer lines corresponding to the completely shut-down substation based on the distribution network line connections and the topology model; determining a set of candidate reverse-band bus lines based on the transfer line selection criteria and the power flow section information; determining the target reverse-band bus line using a multi-objective optimization reverse-band bus line model based on the candidate reverse-band bus line set; and performing a load transfer operation based on the target reverse-band bus line to restore power supply from the transfer-side substation to the fault-side completely shut-down substation. This technical solution provides dispatchers with an efficient and accurate load transfer solution.

Description

Technical Field

[0001] This disclosure relates to the field of power distribution network control technology, and in particular to a load transfer method, apparatus, equipment, medium and product for a completely shut-down substation. Background Technology

[0002] Due to main grid work such as infrastructure crossings and substation upgrades, it is often necessary to shut down both incoming lines of a 110 kV substation. To ensure power supply reliability and meet power demand, it is often necessary to perform hot switching operations on the distribution network load connected to the 10 kV bus of the substation. Currently, the load switching of a substation with a complete shutdown mostly relies on manual experience. The switchover path of each distribution network line is determined manually to form a substation shutdown and switchover plan. The switchover operation is then carried out manually or on-site according to the plan.

[0003] The distribution network has a flexible structure and features interconnection within stations and connections between multiple stations. Sometimes, there is a lack of connections in local distribution networks. A complete shutdown of a station involves multiple levels of line supply, and the operation mode of the distribution network is complicated. Therefore, the traditional load transfer process has the following disadvantages: (1) Manual analysis of the power grid topology and connection relationship is time-consuming and laborious, resulting in low decision-making efficiency; (2) It is difficult to take into account multiple objectives such as current margin, main transformer load, voltage quality and network loss, resulting in insufficient economy and safety of the transfer scheme; (3) The operation sequence depends on manual formulation, and the anti-misoperation blocking and fault tolerance mechanisms are not perfect, resulting in high risk of on-site operation. Summary of the Invention

[0004] This disclosure provides a load transfer method, apparatus, equipment, medium, and product for a completely shut-down substation, achieving global optimization of load transfer and providing dispatchers with an efficient and accurate transfer solution.

[0005] Firstly, a load transfer method for a completely shut-down substation is provided, including: Obtain the topology model, distribution network line connections, and power flow section information of the fault-side substation that is completely shut down; the power flow section information includes the power flow section information of the fault-side substation that is completely shut down and the power transfer side substation within a preset time period. Based on the distribution network line connection relationship and the topology model, the set of transfer lines corresponding to the completely shut-down substation is determined; the set of transfer lines includes at least one transfer line, and each transfer line includes a local line, a tie switchgear and a substitute line. Based on the screening criteria for transfer lines, the set of transfer lines and the power flow section information are used to determine the set of candidate lines for the reverse bus. Based on the candidate line set of anti-band bus, the target anti-band bus line is determined using a multi-objective optimization anti-band bus model; Based on the target reverse bus line, a load transfer operation is performed so that the transfer-side substation can restore power to the fault-side fully shut-down substation.

[0006] Secondly, a load transfer device for a completely shut-down substation is provided, comprising: The acquisition module is used to acquire the topology model, distribution network line connection relationship and power flow section information of the fault-side completely shut-down substation; the power flow section information includes the power flow section information of the fault-side completely shut-down substation and the transfer-side substation within a preset time. The transfer line set determination module is used to determine the transfer line set corresponding to the completely shut-down substation based on the distribution network line connection relationship and the topology model; the transfer line set includes at least one transfer line, and each transfer line includes a local line, a tie switchgear and a substitute supply line; The module for determining the candidate line set of reverse-band busbars is used to determine the candidate line set of reverse-band busbars based on the screening conditions of the transfer line and the power flow section information. The target anti-band bus line determination module is used to determine the target anti-band bus line based on the anti-band bus candidate line set and using a multi-objective optimized anti-band bus model. The load transfer module is used to perform load transfer operations based on the target reverse bus line, so that the transfer-side substation can restore power supply to the fault-side fully shut-down substation.

[0007] Thirdly, an electronic device is provided, comprising: At least one processor; and, A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the load transfer method for a completely shut-down substation as described in the first aspect above.

[0008] Fourthly, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the load transfer method for a completely shut-down substation as described in the first aspect above.

[0009] Fifthly, a computer program product is provided, the computer program product comprising a computer program, which, when executed by a processor, implements the load transfer method for a completely shut-down substation as described in the first aspect above.

[0010] This disclosure provides a load transfer method, apparatus, equipment, medium, and product for a completely shut-down substation. The method includes: acquiring the topology model, distribution network line connections, and power flow section information of the fault-side completely shut-down substation; the power flow section information includes the power flow section information of the fault-side completely shut-down substation and the transfer-side substation within a preset time period; determining a set of transfer lines corresponding to the completely shut-down substation based on the distribution network line connections and the topology model; the set of transfer lines includes at least one transfer line, and each transfer line includes a local line, a tie switchgear, and a substitute line; determining a set of candidate anti-band bus lines based on transfer line screening conditions using the set of transfer lines and the power flow section information; determining a target anti-band bus line using a multi-objective optimization anti-band bus line model based on the candidate anti-band bus line set; and performing a load transfer operation based on the target anti-band bus line to restore power supply from the transfer-side substation to the fault-side completely shut-down substation. This technical solution first acquires the topology model of the fault-side substation that is completely shut down, the distribution network line connections, and power flow section data containing power flow information of the fault-side and transfer-side substations within a preset time period. Then, based on the connections and topology model, it determines the set of transfer lines. Next, according to the transfer line selection criteria, it selects candidate lines for the reverse-band bus based on the transfer line set and power flow section information. Then, it determines the optimal target reverse-band bus line from the candidate lines through a multi-objective optimization reverse-band bus model. Finally, it performs load transfer operations based on this target line, enabling the transfer-side substation to restore power to the fault-side substation that is completely shut down. This effectively solves the problem of large-scale load transfer, achieves global optimization of load transfer, provides dispatchers with an efficient and accurate transfer solution, and effectively solves the problem of excessively long transfer times.

[0011] It should be understood that the content described in this section is not intended to identify key or important features of the embodiments of this disclosure, nor is it intended to limit the scope of the embodiments of this disclosure. Other features of the embodiments of this disclosure will become readily apparent from the following description. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a flowchart of a load transfer method for a completely shut-down substation provided in Embodiment 1 of this disclosure; Figure 2 This is a schematic diagram of a search process based on a depth-first search method provided in Embodiment 1 of this disclosure; Figure 3 This is a schematic diagram of the process for determining a target reverse-band bus line according to Embodiment 1 of this disclosure; Figure 4 This is a schematic diagram illustrating the execution process of another load transfer method for a completely shut-down substation provided in Embodiment 1 of this disclosure; Figure 5 This is a schematic diagram of the structure of a 110 / 10 kV fault station provided in Embodiment 1 of this disclosure; Figure 6 This is a schematic diagram of the load transfer device for a completely shut-down substation provided in Embodiment 2 of this disclosure; Figure 7 This is a schematic diagram of the structure of an electronic device provided in Embodiment 3 of this disclosure. Detailed Implementation

[0014] To enable those skilled in the art to better understand the solutions of the embodiments of this disclosure, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the protection scope of the embodiments of this disclosure.

[0015] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0016] Example 1 Figure 1 This is a flowchart illustrating a load transfer method for a completely shut-down substation according to Embodiment 1 of this disclosure. This embodiment is applicable to load transfer in the case of a completely shut-down substation. The method can be executed by a load transfer device for the completely shut-down substation. This load transfer device can be implemented in hardware and / or software and can be configured in electronic equipment, including but not limited to computers, terminals, and servers, which are devices with data processing capabilities. Figure 1As shown, the method includes: S110. Obtain the topology model, distribution network line connections, and power flow section information of the fault-side substation that is completely shut down; the power flow section information includes the power flow section information of the fault-side substation that is completely shut down and the power transfer side substation within a preset time.

[0017] In this embodiment, a substation experiencing a complete power outage on the fault side can be a substation where all incoming power lines are lost due to a fault, maintenance, or other reasons, and all main transformers within the substation are shut down, making it unable to supply power to the load normally. This state means that the substation completely loses its power supply capacity, and all users within its power supply range will face a power outage. For example, a substation experiencing a complete power outage is a 110 kV or lower substation with double-winding transformers, and all incoming power lines or main transformers within the substation are shut down, while the 10 kV busbar is operational.

[0018] Specifically, the topology model, distribution network line connections, and power flow section information of the fault-side substation can be obtained using dispatch automation systems and distribution automation systems. The topology model describes the connection relationships and structural layout of electrical equipment within the fault-side substation that is completely shut down. The distribution network line connections describe the connection points and connectivity between various lines in the distribution network. The power flow section information can include the power flow section information of the fault-side substation that is completely shut down and the substation on the transfer side within a preset time period (e.g., N days). For example, the power flow section information can include: the power flow section at the moment of maximum current on the fault side and the transfer side within the previous N days; and the active power on the fault side. No merit Fault side current Active power supply on the transfer side Reactive power supply on the transfer side , transfer side bus voltage Current supplied to the power supply side Current limit of the transfer side line Transformer capacity on the supply side Rated capacity of the power supply side transformer Information such as...

[0019] S120. Based on the distribution network line connection relationship and topology model, determine the set of transfer lines corresponding to the substation with complete shutdown; the set of transfer lines includes at least one transfer line, and each transfer line includes the local line, the connecting switch equipment and the substitute line.

[0020] It is known that, based on the obtained topology and interconnection, the transfer path can be initially identified. By analyzing the correspondence between the distribution network line interconnection and the substation topology model, the set of transfer lines that can provide power support for the fault-side substation that is completely shut down can be determined. Each transfer line consists of three parts in structure: the local line connecting the fault-side substation, the interconnection switchgear that realizes line switching, and the substitute supply line drawn from the transfer-side substation.

[0021] S130. Based on the screening conditions of the transfer lines, the candidate line set of the reverse busbar is determined by using the transfer line set and power flow section information.

[0022] In this embodiment, after determining the set of transfer paths, the actual carrying capacity and operational adaptability of each transfer path can be evaluated based on the transfer path screening conditions and the transfer path set combined with power flow section information. Paths that do not meet the conditions are removed from the transfer path set, and those that meet the requirements are retained to form a set of candidate reverse busbar paths. The candidate reverse busbar path set can include at least one candidate reverse busbar path. A candidate reverse busbar path can be a special operating mode in distribution network fault handling, referring to the operation mode where, in the event of a complete substation outage, external power is reversed from the low-voltage side to the substation busbar via a tie line, turning the busbar that was originally supplying power outwards into a receiving busbar, thereby restoring power to the completely out-of-station substation. Candidate reverse busbar paths refer to the set of paths that, after technical screening, meet the conditions for performing this reverse power supply operation. The transfer path screening conditions can be conditions for screening new transfer paths; for example, the transfer path screening condition can be that the transfer path has an external tie channel.

[0023] S140. Based on the candidate line set of anti-band bus, the target anti-band bus line is determined by using a multi-objective optimization anti-band bus model.

[0024] It is known that after determining the candidate anti-band bus route set, a multi-objective optimization anti-band bus model can be used to evaluate and optimize the candidate route set, thereby determining the target anti-band bus route. The target anti-band bus route can be the anti-band bus route with the best overall performance among the candidate routes. The multi-objective optimization anti-band bus model can be a pre-constructed mathematical model used to seek the best balance among multiple conflicting optimization objectives. Using the candidate route set as the decision space, the multi-objective optimization anti-band bus model transforms the route selection problem into a multi-objective optimization problem, comprehensively evaluates and optimizes the candidate routes, and finally outputs a target anti-band bus route with the best overall performance across multiple dimensions.

[0025] S150. Based on the target reverse bus line, perform load transfer operation to restore power supply from the transfer-side substation to the fault-side fully shut-down substation.

[0026] Specifically, once the target reverse bus line is determined, a specific load transfer operation plan can be formulated based on the target reverse bus line. By remotely controlling or operating the interconnection switch equipment on-site, the operation mode of the distribution network can be changed, and the load of the fault-side substation that is completely shut down can be transferred to the substation on the transfer side for power supply. This will enable the rapid restoration of power supply to the outage area and complete the entire fault emergency response and power restoration process.

[0027] This embodiment provides a load transfer method for a completely shut-down substation, including: acquiring the topology model, distribution network line connections, and power flow section information of the fault-side completely shut-down substation; the power flow section information includes the power flow section information of the fault-side completely shut-down substation and the transfer-side substation within a preset time period; determining the transfer line set corresponding to the completely shut-down substation based on the distribution network line connections and the topology model; the transfer line set includes at least one transfer line, and each transfer line includes a local line, a tie switchgear, and a substitute line; determining a candidate set of anti-band bus lines based on the transfer line screening conditions, using the transfer line set and the power flow section information; determining a target anti-band bus line using a multi-objective optimization anti-band bus line model based on the candidate anti-band bus line set; and performing a load transfer operation based on the target anti-band bus line so that the transfer-side substation restores power to the fault-side completely shut-down substation. This technical solution enables the restoration of power supply from the transfer-side substation to the fault-side substation that has experienced a complete power outage. It effectively solves the problem of large-scale load transfer, achieves global optimization of load transfer, provides dispatchers with an efficient and accurate transfer solution, and effectively solves the problem of excessively long transfer time.

[0028] As an optional implementation of this embodiment, the load transfer method for a completely shut-down substation provided in this embodiment further includes, before determining the target anti-band bus line using a multi-objective optimization anti-band bus line model based on the anti-band bus candidate line set: The multi-objective optimized reverse bus model is constructed based on the aforementioned transfer margin and the power supply quality indicators of the transfer-side substations.

[0029] In this embodiment, the multi-objective optimized reverse bus model can be constructed based on the respective power transfer margins and the power supply quality indicators of the power transfer-side substations. The power supply quality indicators of the power transfer-side substations may include the main transformer load of the power transfer-side substation, the voltage deviation of the power transfer-side bus, and the network loss on the power transfer side.

[0030] For example, the multi-objective optimization anti-band bus model can be expressed as: ; in, , , , The weight coefficients can be represented separately and can be determined using the analytic hierarchy process (AHP). It can be supplied on behalf of others. The current margin of each power supply line, It can be the first Current limit for each power supply line. It can be supplied on behalf of others. The capacity of the main transformer belonging to each power supply line. It can be the first The rated capacity of the main transformer belonging to each power supply line. It can provide voltage for the busbars of the line that are supplied on behalf of others. It can supply the rated voltage of the busbar to which the line belongs. It can account for the difference in network loss before and after the supply is provided. This can be the baseline network loss value, where the difference in network loss before and after the supply is calculated as follows: ; in, It can be the first Network loss before the replacement of the power supply line It can be the first Network loss after the replacement of the power supply line Equivalent resistance It can be the current before the supply is replaced. It can be the current after the replacement.

[0031] As an optional implementation of this embodiment, the step of determining the set of transfer lines corresponding to the completely shut-down substation based on the distribution network line connection relationship and the topology model further includes: 1) Determine the bus configuration information of the completely shut-down substation based on the topology model.

[0032] In this embodiment, the topology model can be analyzed to determine the bus configuration information of the substation that is completely shut down. The bus configuration information refers to a set of technical parameters that describe the structure and electrical characteristics of the internal bus system of the substation. The bus configuration information may include the number of buses in the station, voltage level, wiring method, and connection relationship between buses, so as to clarify which buses need to be restored to power supply and the electrical characteristics of each bus.

[0033] 2) Generate a topology connection set corresponding to the bus configuration information based on the distribution network line connection relationship.

[0034] It is known that, based on the distribution network line connection relationship, each bus in the bus configuration information can be used as a starting point to extend outwards to find all lines and / or nodes that have electrical connection with it, generating a topology connection set that includes bus and its associated lines, switches, adjacent substations, and other elements.

[0035] 3) Based on a preset search method, the topology connection set is searched to determine multiple candidate interconnection switching devices.

[0036] In this embodiment, after determining the topology connection set, all lines in the topology connection set can be analyzed using a preset search method based on the common information model (CIM) of the power system to determine as many candidate interconnection switching devices as possible.

[0037] The preset search method can be a pre-defined search method. For example, the preset search method can be a depth-first search method. Figure 2 This embodiment provides a schematic diagram of a search process based on a depth-first search method, as shown below. Figure 2 As shown, the process begins by traversing and marking a bus node in a completely out-of-service substation. Then, based on the distribution network's adjacency matrix or adjacency list, it searches for the next-level electrical nodes directly connected to that bus node, such as next-level switches, lines, or adjacent substations, and marks these nodes. During the search, it checks if there are any connected but unmarked nodes at the current node. If so, it continues to explore the next level of nodes, exploring outwards layer by layer along the electrical connections until a node connected to an external power source is found or the search cannot continue. If no unmarked connected nodes are found, it returns to the previous level node for backtracking and checks if that node is the initial bus node. If it has backtracked to the initial node and there are no other unmarked connected nodes, the search ends. This depth-first traversal method systematically explores all potential electrical paths originating from the faulty bus, identifies switching equipment with interconnection functions along the path as candidate interconnection switches, and provides a complete topology search foundation for subsequent screening and optimization.

[0038] 4) Use preset filtering conditions to filter each candidate tie switch equipment to determine the tie switch equipment set.

[0039] It is known that after obtaining each candidate tie switch, the candidate tie switch can be screened using preset screening conditions. The preset screening conditions can be that the candidate tie switch should simultaneously meet four conditions: online, not in the substation room, not with "fault, defect, maintenance, remote control prohibited" signs, and all switches on the connection path to the outgoing switch of the opposite line are in the correct position.

[0040] 5) Determine the set of transfer lines based on the local and secondary supply lines associated with each tie switch in the tie switch set.

[0041] Specifically, for each tie switch in the tie switchgear set, trace the line information associated with both sides of it, determine the side connected to the busbar of the faulty substation as the local line, and the other side connected to the substation that can provide power as the substitute line. The tie switchgear and its associated local and substitute lines form a complete transfer line, and finally all transfer lines are gathered to form a transfer line set.

[0042] As an optional implementation of this embodiment, the step of determining the candidate line set for the reverse-band busbar based on the transfer line screening conditions and the power flow section information includes: 1) Based on the power flow section information, determine the transfer margin corresponding to each of the transfer lines; the transfer margin includes current margin and load margin.

[0043] It is known that the transfer margin corresponding to each of the aforementioned transfer lines can be determined based on the power flow section information. The transfer margin can be used to represent the capacity boundary of the transfer line to accept additional loads. The transfer margin can include current margin and load margin. Specifically, the current margin can be used to represent the difference between the thermal stability limit of the line conductor and the current current, while the load margin can be used to represent the margin between the maximum active power allowed to be transmitted by the line and the current load. For example, the current margin can be expressed as The load margin can be expressed as Then we have: ; in, It can provide current margin for the supply line. Current limits can be set for the lines supplied on behalf of others. It can provide the line before Maximum current within the day This can provide load margin for the power supply lines. It can supply the rated voltage of the line bus.

[0044] 2) Based on the set of transfer lines, the set of transfer lines is screened using the transfer line screening conditions, the current margins of each line, and the load margins of each line to determine the set of candidate lines for the reverse bus.

[0045] It is known that the transfer lines in the transfer line set can be screened using transfer line screening conditions, various current margins, and various load margins. Transfer lines that meet the transfer line screening conditions (i.e., the transfer line is an inter-station connection), and whose current margin and load margin meet preset current margin threshold conditions, and load margins meet preset load margin threshold conditions, are identified as the anti-bus candidate line set. The transfer line screening conditions may include determining whether the power supply on the transfer station side of the feasible transfer path comes from the electrical connection relationship of different substations, i.e., whether the transfer line has an external connection channel; if so, the transfer path is determined to be an inter-station connection.

[0046] It should be explained that the lines connected to the busbar of a completely shut-down substation, excluding the lines in the candidate line set of the reverse busbar, can also be formed into a set of lines to be supplied with power. If the lines in the set of lines to be supplied with power are within the reverse busbar margin range, then the lines to be supplied with power in the set of lines to be supplied with power are supplied by the reverse busbar lines.

[0047] As an optional implementation of this embodiment, the step of determining the target anti-band bus line based on the anti-band bus candidate line set using a multi-objective optimization anti-band bus model includes: 1) The set of candidate anti-band bus lines is screened using preset line constraints to determine at least one initial candidate anti-band bus line.

[0048] It is known that the set of candidate anti-band bus lines can be preliminarily screened using preset line constraints, thereby determining at least one initial candidate anti-band bus line after screening.

[0049] The preset line constraints can be expressed as follows: ; in, It can be supplied on behalf of others. The current margin of each power supply line, It can be the first Current limit for each power supply line. To supply the rated voltage of the busbar to which the line belongs, It can be the first The load limit of each power supply line. For the next generation of supplies The capacity of the main transformer belonging to each power supply line. For the first The rated capacity of the main transformer belonging to each power supply line. The allowable main transformer load rate, For all the candidate lines in the anti-band bus that can be transferred to the first The total number of main transformers belonging to each power supply line. , These represent the permissible degree of deviation.

[0050] 2) For each initial anti-band bus candidate line, the evaluation result corresponding to each initial anti-band bus candidate line is determined by using the multi-objective optimization anti-band bus model.

[0051] It is known that, for each initial anti-band bus candidate line, a multi-objective optimization anti-band bus model is used to conduct a comprehensive performance evaluation of each initial anti-band bus candidate line, and the evaluation results corresponding to each initial anti-band bus candidate line are determined.

[0052] 3) Sort the evaluation results to determine the target reverse-band bus line based on the sorting results.

[0053] It is known that the evaluation results of all initial anti-band bus candidate lines are ranked and compared. The ranking criteria can be the quality of the comprehensive evaluation value, the degree of achievement of the main objectives, or the weight of the decision-maker's preference. The line with the best performance is identified through ranking, and finally the line is determined as the target anti-band bus line.

[0054] Figure 3 This embodiment provides a schematic diagram of the process for determining a target reverse-band bus line, as shown below. Figure 3 As shown, the model iterates through the candidate line set for reverse busbars, checking whether each line meets preset constraints (preset line constraints), including hard safety requirements such as current margin, main transformer load, and voltage deviation. If not, the line is eliminated; otherwise, it proceeds to the comprehensive evaluation value calculation stage. When calculating the comprehensive evaluation value F, the model considers four dimensions: current margin, main transformer load, voltage deviation, and network loss variation. Multiple objectives are transformed into a single evaluation value through weighting or other fusion methods. Then, all candidate lines that pass the constraint screening are sorted in ascending order of F value, prioritizing lines with better evaluation values. After sorting, a decision rule is applied for final selection, prioritizing public lines and lines with more transformers. This means that when evaluation values ​​are similar, public lines are preferred over dedicated lines, and lines with more transformer areas are prioritized to achieve wider power restoration. Finally, based on the sorting results and decision rules, the optimal line is output, which is determined as the target reverse busbar line, guiding subsequent load transfer operations.

[0055] It needs to be explained that the optimal reverse busbar line is selected from the candidate line set for reverse busbars and their corresponding power supply lines. Among them, the public line is reversed first, and the priority is sorted according to the number of line distribution variables. The line with more distribution variables is reversed first. After the public line is reversed, if there is still a margin, the decision is made to reverse the dedicated line. The smaller the current of the dedicated line, the higher the priority to reverse it. If there is no line that needs to be reversed, only the transformer used is supplied.

[0056] As an optional implementation of this embodiment, the step of performing a load transfer operation based on the target reverse-current bus line, so that the transfer-side substation restores power supply to the fault-side completely shut-down substation, includes: 1) Control the closing of the tie switch equipment corresponding to the target reverse bus line, and transfer the power supply of the transfer-side substation to the fault-side outage substation via the target reverse bus line.

[0057] It is known that after the target reverse busbar is determined, a remote or local operation command can be issued to the tie switch equipment on the determined target reverse busbar line to switch the tie switch equipment from the open state to the closed state, thereby establishing an electrical path from the transfer-side substation to the fault-side completely shut-down substation. The power of the transfer-side substation is then transmitted in reverse to the busbar of the fault-side substation via the substitute supply line, tie switch and local line in the target reverse busbar line, realizing the cross-regional transfer and physical connection of power supply.

[0058] 2) Use the power supplied to the fault-side substation that is completely shut down to restore power supply to the loads under the fault-side substation that is completely shut down.

[0059] As described above, the power supply capacity of a completely shut-down substation on the fault side can be restored using the established transfer power supply. Once the transfer power supply is successfully delivered to the busbar of the completely shut-down substation, the busbar inside the station is energized again, and the voltage returns to normal levels. At this time, by closing the outgoing switch or distribution switch of the substation, the power is distributed to each outgoing line, and power is restored to the loads inside the station (such as distribution transformers, high-voltage users, and low-voltage loads) in sequence, completing the entire process from power transfer to load restoration, and finally achieving full power restoration of the power supply area of ​​the completely shut-down substation on the fault side.

[0060] It should be explained that the lines in the set of lines to be supplied with power can be removed from the lines that are reversed to form a set of lines that are out of power. The lines in the set of lines that are out of power can be identified as out of power, and the power transfer strategy for the out of power can be determined based on the received data.

[0061] A switch operation sequence table can also be generated based on the above power transfer strategy. The decision results may include: the determined target reverse bus line, the determined set of power outage lines, and other unselected lines in the candidate reverse bus line set determined based on the target reverse bus line as dedicated lines.

[0062] The load transfer strategy refers to a series of operational principles and technical regulations formulated to safely and orderly transfer loads after the target reverse bus line has been identified. These mainly include the sequential logic of operations, such as disconnecting the fault-side power supply before closing the tie switch to avoid loop impact; the timing coordination requirements for switch operations; the activation and deactivation adjustment methods of relay protection and automatic devices; voltage and reactive power control measures; the load transfer sequence during the transfer process, such as transferring important users first and then general users; the operation confirmation conditions at each stage; and the contingency plan for handling abnormalities. These strategies ensure that the load transfer operation complies with the power grid safety operation procedures, prevents equipment risks such as overload, voltage exceeding limits, and protection malfunctions, and ensures a smooth transition and reliable power restoration during the transfer process.

[0063] As described above, the operation sequence in the operation sequence table follows a strict anti-misoperation interlocking logic, and each step has remote signaling and telemetry verification points. The dispatcher can add or delete switches on the operation form according to the actual situation. The switch operation sequence is as follows: 1. Operation of external power supply lines: First, close the tie switch equipment, determine that the remote signaling value of the tie switch equipment is closed and the current value is greater than the threshold value, and finally, if the line head terminal switch is a three-remote switch, open the head terminal switch; otherwise, open the substation outgoing line switch.

[0064] 2. Stop the dedicated line: Turn on the switch inside the dedicated line station.

[0065] 3. Power outages / disruptions: Manual adjustments will be made based on the dispatcher's on-site decisions.

[0066] 4. Reverse bus operation: Close the tie switch equipment, and then determine that the remote signaling value of the tie switch is closed and the current value is greater than the threshold value.

[0067] 5. Stop the low-voltage side switch of the main transformer in the main station: Open the low-voltage side switch of the main transformer in the substation that is completely shut down.

[0068] The sequence of switch operations must be reviewed and confirmed by the dispatcher. If a step fails during execution, an alarm will be triggered and the process will be paused. The current step can be skipped or the process can be terminated manually only after the dispatcher confirms it manually.

[0069] Figure 4 This embodiment provides a schematic diagram illustrating the execution process of another load transfer method for a completely shut-down substation, as shown below. Figure 4As shown, a specific busbar object that needs to have its power restored can be selected from the substations that are completely shut down as the fault-side substations that are completely shut down. Then, the real-time topology model of the completely shut-down substation, the connection relationship of the distribution network lines, and the power flow section information of the moment with the maximum current in the previous N days on the fault side and the transfer side are obtained to provide a data foundation for subsequent analysis. Next, the topology connection relationship of the distribution network lines connected to the busbar is formed into a transfer line set, and a depth-first search method is used to perform real-time topology analysis on all lines in the transfer line set to determine whether each line has an external connection channel.

[0070] As described above, for lines with external connection channels, they are included in the set of candidate lines for reverse busbars that can be transferred to external locations. The optimal reverse busbar line is then determined based on the optimal reverse busbar line model. For lines without external connection channels, dedicated lines and lines already included in the candidate set of reverse busbars are removed to form a set of lines awaiting power supply. It is then determined whether the lines in the set of lines awaiting power supply are within the reverse busbar margin range. If they are within the margin range, power is restored by connecting the reverse busbar lines to the busbar. If they are not within the margin range, manual adjustments are made based on the dispatcher's on-site decision. This allows the remaining lines in the set of lines awaiting power supply, excluding the reversed lines, to be considered as the set of lines experiencing power outages. Finally, a switch operation sequence table is generated based on the transfer strategy. The dispatcher adds or deletes lines according to the actual situation, manually reviews and confirms the changes, and executes the steps accordingly. A transfer connection diagram is also generated based on the transfer strategy, completing a closed-loop process from fault identification, path search, optimization decision-making to operation execution.

[0071] The beneficial effects of the above technical solution are as follows: (1) The CIM model and depth-first search are used to automatically screen feasible paths, and the multi-objective optimization model is used to replace manual experience decision-making, which greatly improves the efficiency and scientific nature of decision-making. (2) By combining the reverse bus strategy with the multi-objective optimization model, and taking into account multiple key indicators such as current, main transformer load, voltage, and network loss, the global optimization of load transfer was achieved, and the economic efficiency of system operation was improved. (3) Through strict constraint verification, fault-tolerant operation procedures and manual confirmation mechanism, a multi-level safety defense line was built, which significantly reduced the risk of misoperation in on-site operations.

[0072] This embodiment also provides an application example of a load transfer method for a completely shut-down substation, taking a 110 / 10 kV fault station (fault side) that needs to be completely shut down for comprehensive maintenance as an example. Figure 5This embodiment provides a structural schematic diagram of a 110 / 10 kV fault station. The method includes: acquiring the topology model, distribution network line connections, and power flow section information of the fault-side completely shut-down substation, and performing automatic screening of power transfer paths: the 10 kV side adopts a single busbar segmented connection with a total of 16 outgoing lines, of which... The busbar section has 7 lines (L1, L2, L3, L4, L5, L13, L15). The busbar section has 9 lines (L6, L7, L8, L9, L10, L11, L12, L14, L16). The faulty substation (fault side) experienced a lack of start-up terminals. There are a total of 9 external interconnection channels, involving 3 opposite (transfer-supply-side) substations (A, B, C). The main transformer capacity on each opposite side is 50MVA, and the current limit for each interconnection line is 530A. The power flow cross-section at the moment of maximum current within the previous 7 days is obtained. Information on the outgoing lines of the completely shut-down substation and the main transformer information of the opposite substations is shown below: Table 1. Outgoing Lines and Connection Information of Substations Completely Out of Service Table 2 Main transformer information of the opposite substation Classification and preliminary margin verification of transfer paths: Analyze the lines with external connections and their substitute supply lines to determine whether they meet the transfer conditions. Lines that meet the transfer conditions are included in the anti-bus candidate line set. Lines that do not meet the transfer conditions and lines without external connections form a set of lines to be supplied with power. The margin verification results of the connection lines are shown in Table 3.

[0073] Table 3 Results of Linkage Margin Verification Candidate lines for reverse busbars: L1 (dual-channel: substation A-LA12, substation B-LB08), L2 (single-channel: substation A-LA15), L4 (single-channel: substation A-LA09), L6 (dual-channel: substation B-LB12, substation C-LC05), L7 (single-channel: substation B-LB07), L9 (single-channel: substation B-LB11), L11 (single-channel: substation C-LC08); Collection of power supply lines (must be powered by reverse busbars): Sections: L3 (4.6MW, 28 transformers), L5 (4.1MW, 20 transformers), L13 (3.2MW, 1 transformer), L15 (3.6MW, 1 transformer). Sections: L8 (4.3MW, 22 transformers), L10 (4.4MW, 24 transformers), L12 (6.0MW, 38 transformers), L14 (2.7MW, 1 transformer), L16 (2.2MW, 1 transformer).

[0074] A multi-objective optimal inverse bus model was established and solved: the weighting coefficients were determined using the analytic hierarchy process (AHP) as m1=0.46, m2=0.26, m3=0.19, and m4=0.09, with the maximum main transformer load rate being... The bus voltage range is 10-10.7 kV, the baseline network loss is 0.5 MW, the average length of the line being supplied is 4 km, the average length of the line being supplied is 3 km, and the line resistance is 0.125 Ω. The reactance is 0.35. The rated voltage is 10.5 kV.

[0075] The multi-objective optimal anti-band bus model is solved using the enumeration method: 1. The candidate lines and their substitute supply lines in the anti-band bus candidate line set are screened for constraints. The constraints of the nine candidate schemes are verified. All nine candidate schemes meet the constraints and enter the multi-objective evaluation stage.

[0076] 2. Calculate the comprehensive objective function value for each feasible scheme. The results of the objective function calculation are shown in Table 4.

[0077] Table 4 Calculation results of the objective function 3. Determine the optimal solution based on the calculation results of the enumeration method. Optimal busbar configuration: L1-Channel A; The optimal busbar configuration is L6-Channel C.

[0078] Load allocation was conducted according to the principle of "public lines first, dedicated lines second," and the results are as follows: Substation A supplies power to the faulty station (fault side) via line LA12, with a load margin of 6.5 MVA after line L1. The lines requiring power outages along the busbar can be supplied via L3 (28 transformers) by the number of transformers in the order of public lines. Other dedicated lines cannot be supplied in this manner. Similarly, it can be deduced... The busbar can supply power to L12 via the busbar series connection, but other lines cannot supply power to it.

[0079] The power outage lines are determined based on the optimal reverse bus line: Line LA12 of substation A supplies power to line L3 of the fault station (fault side) via line L1 of the fault station (fault side), and lines L2 and L4 are transferred to the station from outside. The lines that need to be de-energized are L5, L13, and L15. Line LB12 of substation C supplies power to line L12 of the fault station (fault side) via line L6 of the fault station (fault side), and lines L7, L9, and L11 are transferred to the station from outside. The lines that need to be de-energized are L8, L10, L14, and L16. Therefore, the set of power outage lines is L5, L8, L10, L13, L14, L15, and L16.

[0080] Fault-tolerant operation sequence generation and manual confirmation: Based on the above decision results, a switch operation sequence table is generated, as shown in Table 5 below. This operation sequence follows strict anti-misoperation interlocking logic. The current threshold value for closing the tie switch is set to 50A, and the current threshold value for opening the station switch is set to 0. The operation sequence needs to be manually reviewed and confirmed by the dispatcher. If any step fails during execution, an alarm will be triggered and the process will be paused. After the dispatcher confirms, the current step can be manually ignored and subsequent steps can continue to be executed.

[0081] Table 5 Switch Operation Sequence Table This paper addresses complex distribution network structures with multiple interconnection paths and verifies the effectiveness of the proposed scheme in load transfer during a complete power outage. The results show that: 1. This solution successfully solves the power supply problem for lines that cannot be independently transferred by using a reverse busbar method, thus achieving optimized load distribution; 2. In scenarios with multiple alternative paths, this solution can scientifically select the globally optimal reverse bus scheme, significantly improving the decision-making quality of load transfer and the economy of system operation.

[0082] 3. The fault-tolerant operation sequence clearly defines the safety order of "first transfer power, then cut off power, and finally reverse the power supply" and sets up key remote signaling and telemetry verification points and a manual confirmation mechanism, providing a high standard of safety assurance for on-site operations.

[0083] Example 2 Figure 6 This is a schematic diagram of the load transfer device for a completely shut-down substation provided in Embodiment 2 of this disclosure; as shown... Figure 6 As shown, the device includes: an acquisition module 210, a transfer line set determination module 220, a reverse bus candidate line set determination module 230, a target reverse bus line determination module 240, and a load transfer module 250.

[0084] The acquisition module 210 is used to acquire the topology model, distribution network line connection relationship and power flow section information of the fault-side completely shut-down substation; the power flow section information includes the power flow section information of the fault-side completely shut-down substation and the transfer-side substation within a preset time. The transfer line set determination module 220 is used to determine the transfer line set corresponding to the completely shut-down substation based on the distribution network line connection relationship and the topology model; the transfer line set includes at least one transfer line, and each transfer line includes a local line, a connecting switchgear and a substitute line. The reverse-band bus candidate line set determination module 230 is used to determine the reverse-band bus candidate line set based on the transfer line screening conditions, using the transfer line set and the power flow section information. The target anti-band bus line determination module 240 is used to determine the target anti-band bus line based on the anti-band bus candidate line set and using a multi-objective optimized anti-band bus model. The load transfer module 250 is used to perform load transfer operations based on the target reverse bus line, so that the transfer-side substation can restore power supply to the fault-side fully shut-down substation.

[0085] Embodiment 2 of this disclosure provides a load transfer device for a completely shut-down substation, which enables the substation on the transfer side to restore power to the completely shut-down substation on the fault side. It can effectively solve the problem of large-scale load transfer, realize the global optimization of load transfer, provide dispatchers with an efficient and accurate transfer solution, and effectively solve the problem of excessively long transfer time.

[0086] Furthermore, the transfer line set determination module 220 is also used for: The bus configuration information of the completely shut-down substation is determined based on the topology model. Based on the network distribution line connection relationships, a topology connection set corresponding to the bus configuration information is generated; Based on a preset search method, the topology connection set is searched to determine multiple candidate interconnection switching devices; The candidate interconnection switchgear is filtered using preset filtering criteria to determine the set of interconnection switchgear. The set of transfer lines is determined based on the local and secondary supply lines associated with each tie switch in the tie switch set.

[0087] Furthermore, the anti-band bus candidate line set determination module 230 is also used for: Based on the power flow section information, the transfer margin corresponding to each of the transfer lines is determined; the transfer margin includes current margin and load margin. Based on the set of transfer lines, the set of transfer lines is screened using the transfer line screening conditions, the current margins of each line, and the load margins of each line to determine the set of candidate lines for the reverse bus.

[0088] Furthermore, the target reverse-band bus line determination module 240 is also used for The set of candidate anti-band bus lines is screened using preset line constraints to determine at least one initial candidate anti-band bus line. For each initial anti-band bus candidate line, the evaluation result corresponding to each initial anti-band bus candidate line is determined by the multi-objective optimization anti-band bus model. The evaluation results are sorted to determine the target reverse-band bus line based on the sorting results.

[0089] Furthermore, the device also includes: The model building module is used to construct the multi-objective optimized reverse bus model based on the aforementioned transfer margin and the power supply quality indicators of the transfer-side substations.

[0090] Furthermore, the load transfer module 250 is also used for: The corresponding tie switch equipment of the target reverse bus line is closed to transfer the power supply of the transfer-side substation to the fault-side outage substation via the target reverse bus line. Power is restored to the loads under the faulty substation by using the power supplied to the faulty substation that is completely shut down.

[0091] The load transfer device for a completely shut-down substation provided in this disclosure can execute the load transfer method for a completely shut-down substation provided in any embodiment of this disclosure, and has the corresponding functional modules and beneficial effects for executing the method.

[0092] Example 3 Figure 7 A schematic diagram of the structure of an electronic device 10 that can be used to implement embodiments of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the embodiments of the present disclosure described and / or claimed herein.

[0093] like Figure 7 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0094] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0095] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microprocessor, etc. Processor 11 performs the various methods and processes described above, such as load transfer methods for a completely shut-down substation.

[0096] In some embodiments, the load transfer method for a completely shut-down substation can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the load transfer method for a completely shut-down substation described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the load transfer method for a completely shut-down substation by any other suitable means (e.g., by means of firmware).

[0097] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0098] Computer programs for implementing the methods of embodiments of this disclosure may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0099] In the context of embodiments of this disclosure, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0100] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0101] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0102] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0103] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the embodiments of this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of the embodiments of this disclosure can be achieved, and this document does not impose any limitations.

[0104] The specific embodiments described above do not constitute a limitation on the scope of protection of the embodiments disclosed herein. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the embodiments disclosed herein should be included within the scope of protection of the embodiments disclosed herein.

[0105] This disclosure also provides a computer program product, including a computer program and / or instructions, which, when executed by a processor, implements the load transfer method for a completely shut-down substation as provided in any embodiment of this application.

[0106] In implementing a computer program product, computer program code for performing the operations of the embodiments of this disclosure can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0107] Note that the above are merely preferred embodiments and the technical principles applied in this disclosure. Those skilled in the art will understand that this disclosure is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of this disclosure. Therefore, although the embodiments of this disclosure have been described in detail above, this disclosure is not limited to the above embodiments. More other equivalent embodiments may be included without departing from the concept of this disclosure, and the scope of this disclosure is determined by the scope of the appended claims.

Claims

1. A load transfer method for a completely shut-down substation, characterized in that, include: Obtain the topology model, distribution network line connections, and power flow section information of the fault-side substation that is completely shut down; The power flow section information includes the power flow section information of the fault-side completely shut-down substation and the power transfer-side substation within a preset time period. Based on the distribution network line connection relationship and the topology model, the set of transfer lines corresponding to the completely shut-down substation is determined; the set of transfer lines includes at least one transfer line, and each transfer line includes a local line, a tie switchgear and a substitute line. Based on the screening criteria for transfer lines, the set of transfer lines and the power flow section information are used to determine the set of candidate lines for the reverse bus. Based on the candidate line set of anti-band bus, the target anti-band bus line is determined using a multi-objective optimization anti-band bus model; Based on the target reverse bus line, a load transfer operation is performed so that the transfer-side substation can restore power to the fault-side fully shut-down substation.

2. The method according to claim 1, characterized in that, The process of determining the set of transfer lines corresponding to the completely shut-down substation based on the distribution network line connections and the topology model includes: The bus configuration information of the completely shut-down substation is determined based on the topology model. Based on the network distribution line connection relationships, a topology connection set corresponding to the bus configuration information is generated; Based on a preset search method, the topology connection set is searched to determine multiple candidate interconnection switching devices; The candidate interconnection switchgear is filtered using preset filtering criteria to determine the set of interconnection switchgear. The set of transfer lines is determined based on the local and secondary supply lines associated with each tie switch in the tie switch set.

3. The method according to claim 1, characterized in that, The step of determining the candidate set of reverse-band bus lines based on the transfer line screening criteria and the power flow section information includes: Based on the power flow section information, the transfer margin corresponding to each of the transfer lines is determined; the transfer margin includes current margin and load margin. Based on the set of transfer lines, the set of transfer lines is screened using the transfer line screening conditions, the current margins of each line, and the load margins of each line to determine the set of candidate lines for the reverse bus.

4. The method according to claim 1, characterized in that, The step of determining the target anti-band bus line based on the candidate anti-band bus line set using a multi-objective optimization anti-band bus line model includes: The set of candidate anti-band bus lines is screened using preset line constraints to determine at least one initial candidate anti-band bus line. For each initial anti-band bus candidate line, the evaluation result corresponding to each initial anti-band bus candidate line is determined by the multi-objective optimization anti-band bus model. The evaluation results are sorted to determine the target reverse-band bus line based on the sorting results.

5. The method according to claim 3, characterized in that, Before determining the target anti-band bus line using a multi-objective optimization anti-band bus line model based on the anti-band bus candidate line set, the method further includes: The multi-objective optimized reverse bus model is constructed based on the aforementioned transfer margin and the power supply quality indicators of the transfer-side substations.

6. The method according to claim 1, characterized in that, The process of performing a load transfer operation based on the target reverse-band bus line, so that the transfer-side substation restores power to the fault-side completely shut-down substation, includes: The control switch equipment corresponding to the target reverse bus line is closed, and the power supply of the transfer-side substation is transferred to the fault-side outage substation via the target reverse bus line. Power is restored to the loads under the faulty substation by using the power transferred to the faulty substation that is completely shut down.

7. A load transfer device for a completely shut-down substation, characterized in that, include: The acquisition module is used to acquire the topology model, distribution network line connections, and power flow section information of the fault-side substation that is completely shut down. The power flow section information includes the power flow section information of the fault-side completely shut-down substation and the power transfer-side substation within a preset time period. The transfer line set determination module is used to determine the transfer line set corresponding to the completely shut-down substation based on the distribution network line connection relationship and the topology model; the transfer line set includes at least one transfer line, and each transfer line includes a local line, a tie switchgear and a substitute supply line; The module for determining the candidate line set of reverse-band busbars is used to determine the candidate line set of reverse-band busbars based on the screening conditions of the transfer line and the power flow section information. The target anti-band bus line determination module is used to determine the target anti-band bus line based on the anti-band bus candidate line set and using a multi-objective optimized anti-band bus model. The load transfer module is used to perform load transfer operations based on the target reverse bus line, so that the transfer-side substation can restore power supply to the fault-side fully shut-down substation.

8. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the load transfer method for a completely shut-down substation as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements the load transfer method for a completely shut-down substation as described in any one of claims 1-6.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the load transfer method for a completely shut-down substation as described in any one of claims 1-6.

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