A method, device, equipment and storage medium for network reconstruction of a transmission network bus

Abstract

The present invention discloses a method, device, equipment and storage medium for network reconfiguration of transmission network buses, which relates to the technical field of power system simulation. It includes starting from the 10 kV bus of the main transformer under maintenance in the transmission network, and for the 10 kV bus incoming line breaker disconnected due to main transformer maintenance and the distribution network feeders de-energized after operation, using topological analysis method to conduct topological search on each distribution network feeder. Subsequently, the feeders with independent transfer supply schemes can be independently transferred and supplied, and the feeders without independent transfer supply schemes can be spliced to the head end of the independently transferred and supplied feeders to simulate the reverse charging of the de-energized feeders due to main transformer maintenance through the distribution network for power supply, reasonably dispersing the operation risks of each feeder after transfer supply, and adopting weighted index optimization method and optimal load recombination method to reasonably give the optimal network reconfiguration scheme of the distribution network that can improve the basic state index.

Description

Technical Field

[0001] The present invention relates to the technical field of power system simulation, and particularly to a method, device, equipment and storage medium for network reconstruction of transmission network buses. Background Art

[0002] In recent years, with the development of power grid intelligence, the functions of transmission and distribution networks will be further integrated. In view of the main transformer maintenance problems existing in the operation of transmission networks, traditional dispatchers need to invest a large amount of manpower and material resources in finding maintenance transfer supply schemes, and may not be able to find the most reasonable and safe bus power supply feeder maintenance scheme. With the increasing improvement of the distribution network grid and its increasing bearing capacity, for the feeders that cannot be transferred during the maintenance of the main transformer in the transmission network, it is becoming more and more feasible to transfer the feeders through the distribution network and perform reverse charging to supply the feeders that cannot be transferred in the transmission network. The existing grid bus power supply feeder reconstruction methods do not consider the problem that the transfer supply scheme becomes invalid after over-limit. Therefore, how to find a reasonable and safe sub-optimal reverse charging transfer supply scheme after the grid bus power supply feeder scheme becomes invalid due to over-limit is a problem to be solved at present. Summary of the Invention

[0003] The purpose of the present invention is to provide a method, device, equipment and storage medium for network reconstruction of transmission network buses to solve the problem that a large amount of resources are consumed in finding a reasonable and safe grid bus power supply feeder maintenance scheme in the prior art.

[0004] To solve the above technical problems, the present invention provides a method for network reconstruction of transmission network buses, including:

[0005] Construct a list of feeders to be transferred, a list of un-searched nodes, a list of associated node devices, a list of disconnected switches, a list of feeders with recoverable power supply, a list of power-loss feeders, a list of basic transfer supply schemes, a list of reverse charging transfer supply schemes, and a list of sub-optimal reverse charging transfer supply schemes;

[0006] Based on the distribution network node types, using the depth-first search logic, sequentially search for the nodes and devices connected to the current feeder root node from the feeder root node in a recursive manner, set the feeder to which the nodes and devices in the current feeder search process belong as the current feeder, and mark it as the live state until the end of the power grid or a switch device with a remote signaling state of disconnected is searched;

[0007] Add all switch devices with a remote signaling state of disconnected to the list of disconnected switches, based on the list of disconnected switches, find the transfer supply schemes of the feeders in the list of feeders to be transferred, add the feeders with transfer supply schemes to the list of feeders with recoverable power supply, and add the feeders lacking transfer supply schemes to the list of power-loss feeders;

[0008] Construct a virtual load, superimpose the powers of the power - lost feeders in the power - lost feeder list to obtain the total reverse - charging load power of the virtual load in the network reconfiguration area. Select an arbitrary transfer - supply plan from each transfer - supply plan of the recoverable - power - supply feeders to form a basic transfer - supply plan, and add all the basic transfer - supply plans to the basic transfer - supply plan list according to permutations and combinations;

[0009] Select the feeders in the recoverable - power - supply feeder list as reverse - charging feeders in sequence, mount the virtual load at the head of the reverse - charging feeder to obtain a reverse - charging transfer - supply plan, and add the reverse - charging transfer - supply plan to the reverse - charging transfer - supply plan list;

[0010] Calculate the base - state line - loss rate index and voltage qualification rate index of the distribution network before transfer - supply, and calculate the base - state final score according to the weights of each index set initially. Operate the action switches corresponding to each transfer - supply plan in the reverse - charging transfer - supply plan list in sequence, set the virtual load, calculate the feeder power flow, count the line - loss rate index and voltage qualification rate index after transfer - supply, and calculate the final score of each reverse - charging transfer - supply plan according to the set weights of each index. Set the reverse - charging transfer - supply plans that cause over - limits after transfer - supply as invalid transfer - supply plans, and screen the optimal reverse - charging transfer - supply plan from the valid plans;

[0011] If there is no such optimal reverse - charging transfer - supply plan, construct a sub - optimal virtual load, read the maximum number of load - shedding loads stored in the commercial library, select less than the maximum number of power - lost feeders in the power - lost feeder list as the loads to be shed according to permutations and combinations, superimpose the powers of the selected power - lost feeders to be shed to obtain the load - shedding power of the sub - optimal virtual load in the network reconfiguration area, superimpose the powers of the power - lost feeders other than the loads to be shed to obtain the total reverse - charging load power of the sub - optimal virtual load in the network reconfiguration area. Use the optimal load recombination method to form sub - optimal transfer - supply plans by combining the total reverse - charging power of all sub - optimal virtual loads with the reverse - charging transfer - supply plan list in sequence, and add all the sub - optimal transfer - supply plans to the sub - optimal reverse - charging transfer - supply plan list;

[0012] Operate the action switches corresponding to each transfer - supply plan in the sub - optimal reverse - charging transfer - supply plan list in sequence, set the sub - optimal virtual load, calculate the feeder power flow, set the sub - optimal reverse - charging transfer - supply plans that cause over - limits after transfer - supply as invalid transfer - supply plans, and screen the valid plan with the smallest load - shedding power of the sub - optimal virtual load as the sub - optimal reverse - charging transfer - supply plan to complete the network reconfiguration of the reverse - charging transmission network bus.

[0013] Preferably, based on the types of distribution network nodes, using the depth-first search logic, search for the nodes and devices connected to the current feeder root node in a recursive manner from the feeder root node in sequence, set the feeder to which the nodes and devices in the current feeder search process belong as the current feeder, and mark it as the energized state until the end of the power grid or the switch device with the remote signaling state being off is reached, including:

[0014] S11. Judge the list of un-searched nodes. If the list of un-searched nodes is not empty, obtain the first node in the list of un-searched nodes as the node to be searched, and continue to step S12; if the list of un-searched nodes is empty, jump to step S18;

[0015] S12. Judge the node to be searched. If the type of the node to be searched is not the feeder root node, jump to step S17; if the type of the node to be searched is the feeder root node, set the feeder to which the node to be searched belongs as the feeder to be searched, and continue to step S13;

[0016] S13. Construct a current node list, add the node to be searched to the current node list; construct a list of subordinate nodes;

[0017] S14. Traverse the nodes in the current node list in sequence, set the feeder to which the node belongs as the feeder to be searched, set the feeder to which the device connected to the node belongs as the feeder to be searched, and add the opposite-end node with the connected device being a two-terminal device to the list of subordinate nodes;

[0018] S15. Clear the current node list, add the nodes in the list of subordinate nodes to the current node list, and clear the list of subordinate nodes;

[0019] S16. Judge the current node list. If the current node list is empty, jump to step S17; if the current node list is not empty, repeat step S14;

[0020] S17. Judge the node to be searched. If the node to be searched is not the last node in the list of un-searched nodes, set the next node in the list of un-searched nodes as the node to be searched, and repeat step S12; if the node to be searched is the last node in the list of un-searched nodes, continue to step S18;

[0021] S18. The topological search of the feeder nodes ends.

[0022] Preferably, add all switch devices with the remote signaling state being off to the list of disconnected switches, based on the list of disconnected switches, search for the transfer scheme of the feeders in the list of feeders to be transferred, add the feeders with transfer schemes to the list of feeders that can be restored to power supply, and add the feeders lacking transfer schemes to the list of power-loss feeders:

[0023] S21. Judge the list of disconnection switches. If the list of disconnection switches is empty, jump to S24. If the list of disconnection switches is not empty, take out the first switch in the list of disconnection switches, and obtain the head node and the tail node of the current disconnection switch;

[0024] S22. Judge the energized states of the head node and the tail node. If the head node or the tail node is a de-energized node, jump to S24. If both the head node and the tail node are energized nodes, judge the feeders to which the head node and the tail node belong. If only one of the head node and the tail node belongs to the list of feeders to be transferred, assume this feeder is the transferable feeder. Then the current disconnection switch can transfer the transferable feeder to another feeder, and perform S23. If none of the feeders to which the head node and the tail node belong belongs to the list of feeders to be transferred, or both the feeder to which the head node belongs and the feeder to which the tail node belongs belong to the list of feeders to be transferred, jump to S24;

[0025] S23. Add the transferable feeder to the list of feeders that can be restored to power supply, use the current disconnection switch as the closing switch that can be restored to power supply, use the circuit breaker corresponding to the transferable feeder as the disconnection switch that can be restored to power supply, form a transfer scheme for the transferable feeder with the closing switch that can be restored to power supply and the disconnection switch that can be restored to power supply, and add this transfer scheme to a list of transfer schemes for the transferable feeder;

[0026] S24. Judge the disconnection switch. If the current disconnection switch is not the last switch in the list of disconnection switches, obtain the next disconnection switch in the list of disconnection switches from the list of disconnection switches, and return to S22. If the current disconnection switch is the last switch in the list of disconnection switches, judge the feeders in the list of feeders to be transferred, and add the feeders that do not belong to the list of feeders that can be restored to power supply to a list of de-energized feeders.

[0027] Preferably, the steps of sequentially selecting the feeders in the list of feeders that can be restored to power supply as reverse charging feeders, mounting the virtual load at the head end of the reverse charging feeder, obtaining a reverse charging transfer scheme and adding the reverse charging transfer scheme to the reverse charging transfer scheme list include:

[0028] S31. Judge the basic transfer scheme list. If the basic transfer scheme list is empty, jump to S33. If the basic transfer scheme list is not empty, take out the first basic transfer scheme in the basic transfer scheme list;

[0029] S32. Judge the list of feeders with recoverable power supply. If the list of feeders with recoverable power supply is empty, jump to S33. If the list of feeders with recoverable power supply is not empty, take the first feeder in the list of feeders with recoverable power supply as the reverse charging feeder, set the head node of the reverse charging feeder as the virtual load mounting node, take the bus incoming switch as the recoverable power supply disconnecting switch, take the transfer scheme belonging to the reverse charging feeder in the current basic transfer scheme as the scheme to be replaced, take the recoverable power supply closing switch in the scheme to be replaced as the recoverable power supply closing switch, form a reverse charging transfer scheme with the virtual load mounting node, the recoverable power supply disconnecting switch, and the recoverable power supply closing switch, add the other transfer schemes in the current basic transfer scheme that do not belong to the reverse charging feeder to the reverse charging transfer scheme, add the reverse charging transfer scheme to the reverse charging transfer scheme list, judge the reverse charging feeder. If the reverse charging feeder is not the last feeder in the list of feeders with recoverable power supply, take the next feeder in the list of feeders with recoverable power supply as the reverse charging feeder, and then repeat S32;

[0030] S33. Judge the current basic transfer scheme. If the current basic transfer scheme is not the last scheme in the basic transfer scheme list, take the next basic transfer scheme in the basic transfer scheme list and repeat S32. If the current basic transfer scheme is the last scheme in the basic transfer scheme list, the search for the reverse charging transfer scheme ends.

[0031] Preferably, calculating the base state line loss rate index and voltage qualification rate index of the distribution network before transfer, and calculating the base state final score according to the weights of each index set initially includes:

[0032] S41. Obtain the feeders in the feeder list to be transferred in sequence;

[0033] S42. Obtain all lines and distribution transformers of the feeder in the feeder list to be transferred, and count the average line loss rate of the base state lines and the average voltage qualification rate of the base state distribution transformers according to the base state power flow result;

[0034] S43. Set the line loss rate scoring weight and voltage qualification rate scoring weight respectively, and calculate the current base state comprehensive score in a weighted manner as: average line loss rate score of base state lines × line loss rate scoring weight + average voltage qualification rate score of base state distribution transformers × voltage qualification rate scoring weight, and calculate the base state final score.

[0035] Preferably, operate the action switches corresponding to the power transfer schemes in the reverse charging power transfer scheme list in sequence, set the virtual load, calculate the feeder power flow, count the line loss rate index and voltage qualification rate index after power transfer, and calculate the final score of each reverse charging power transfer scheme according to the set weights of each index. Set the reverse charging power transfer scheme that causes overload after power transfer as an invalid power transfer scheme. The steps to screen the optimal reverse charging power transfer scheme from the valid schemes include:

[0036] S51. Obtain the reverse charging power transfer scheme list, judge the reverse charging power transfer scheme list of the network reconstruction partition. If the reverse charging power transfer scheme list of the network reconstruction partition is empty, jump to S54. If the reverse charging power transfer scheme list of the network reconstruction partition is not empty, take out the first reverse charging power transfer scheme;

[0037] S52. Calculate the index score of the current reverse charging power transfer scheme, including:

[0038] S521. Close the recoverable power supply closing switch of the current reverse charging power transfer scheme, open the recoverable power supply opening switch of the current reverse charging power transfer scheme, set the virtual load mounting node as the virtual load mounting node of the current reverse charging power transfer scheme, set the virtual load power as the total reverse charging load power, and calculate the feeder power flow after power transfer;

[0039] S522. Obtain all the lines and distribution transformers of the feeders in the feeder list to be transferred. According to the power flow result after power transfer, count the average line loss rate of the distribution network after power transfer and the average voltage qualification rate of the distribution transformers after power transfer;

[0040] S523. Respectively set the line loss rate score weight and voltage qualification rate score weight, and calculate the comprehensive score after power transfer of the current reverse charging power transfer scheme in a weighted manner as:

[0041] Average line loss rate score after power transfer × line loss rate score weight + average voltage qualification rate score of distribution transformers after power transfer × voltage qualification rate score weight, and calculate the final score after power transfer;

[0042] S524. Restore the recoverable power supply opening switch of the current reverse charging power transfer scheme to the open state, restore the recoverable power supply closing switch of the current reverse charging power transfer scheme to the closed state, and restore the virtual load mounting node to be empty;

[0043] S525. Judge the feeder power flow after power transfer. If there is an overload in the feeder power flow, mark the current reverse charging power transfer scheme as invalid;

[0044] S53. Judge the current reverse charging power transfer scheme. If the current reverse charging power transfer scheme is not the last one in the reverse charging power transfer scheme list, take out the next reverse charging power transfer scheme and repeat step S52;

[0045] S54. Traverse the reverse charging power transfer scheme list in sequence. If there is no effective power transfer scheme, there is no optimal reverse charging power transfer scheme; if there is an effective power transfer scheme, select the reverse charging power transfer scheme with the highest score as the optimal reverse charging power transfer scheme.

[0046] Preferably, if there is no such optimal reverse charging power transfer scheme, construct a sub-optimal virtual load, read the maximum number of load shedding stored in the commercial library, and select less than the maximum number of load shedding feeders in the list of power-off feeders as the load to be shed according to permutation and combination. Superimpose the powers of the power-off feeders selected as the load to be shed to obtain the load shedding power of the sub-optimal virtual load in the network reconstruction area. Superimpose the powers of the power-off feeders other than the load to be shed to obtain the total reverse charging load power of the sub-optimal virtual load in the network reconstruction area. Use the optimal load recombination method to sequentially form sub-optimal power transfer schemes with the total reverse charging power of all sub-optimal virtual loads and the reverse charging power transfer scheme list, and add all sub-optimal power transfer schemes to the sub-optimal reverse charging power transfer scheme list, including:

[0047] S61. Obtain the list of power-off feeders and set the list length as M;

[0048] S62. Read the maximum number of load shedding N in the commercial library. If N≥M, then set N = M;

[0049] S63. Construct a sub-optimal virtual load and sequentially select n power-off feeders from the list of power-off feeders as the load to be shed, where 1≤n and n≤N. According to permutation and combination, the sub-optimal virtual load can obtain types of load shedding schemes;

[0050] S64. Sum the powers of the feeders selected as the load to be shed in each load shedding scheme to obtain the load shedding power of the sub-optimal virtual load, and sum the powers of the feeders not selected as the load to be shed in each load shedding scheme to obtain the total reverse charging load power of the sub-optimal virtual load;

[0051] S65. Sequentially combine each load shedding scheme of the sub-optimal virtual load with the reverse charging power transfer scheme list to obtain a sub-optimal reverse charging power transfer scheme and add it to the sub-optimal reverse charging power transfer scheme list.

[0052] Preferably, the operations of successively operating the action switches corresponding to the secondary optimal reverse charging transfer schemes in the list, setting the secondary optimal virtual load, calculating the feeder power flow, setting the secondary optimal reverse charging transfer schemes that cause overload after transfer as invalid transfer schemes, and screening the effective scheme with the smallest load shedding power of the secondary optimal virtual load as the secondary optimal reverse charging transfer scheme to complete the network reconstruction of the reverse charging transmission network bus include:

[0053] S71. Obtain the list of secondary optimal reverse charging transfer schemes, and judge the list of secondary optimal reverse charging transfer schemes. If the list of secondary optimal reverse charging transfer schemes is empty, jump to S74; if the list of secondary optimal reverse charging transfer schemes is not empty, take out the first secondary optimal reverse charging transfer scheme.

[0054] S72. Calculate the index score of the current secondary optimal reverse charging transfer scheme, including:

[0055] S721. Close the recoverable power supply closing switch of the current secondary optimal reverse charging transfer scheme, disconnect the recoverable power supply disconnecting switch of the current reverse charging transfer scheme, set the secondary optimal virtual load mounting node as the secondary optimal virtual load mounting node of the current reverse charging transfer scheme, set the secondary optimal virtual load power as the total reverse charging load power, and calculate the feeder power flow after transfer.

[0056] S722. Restore the recoverable power supply disconnecting switch of the current secondary optimal reverse charging transfer scheme to the disconnected state, restore the recoverable power supply closing switch of the current secondary optimal reverse charging transfer scheme to the closed state, and restore the secondary optimal virtual load mounting node to be empty.

[0057] S723. Judge the feeder power flow after transfer. If there is an overload of the feeder power flow, mark the current secondary optimal reverse charging transfer scheme as invalid.

[0058] S73. Judge the current secondary optimal reverse charging transfer scheme. If the current secondary optimal reverse charging transfer scheme is not the last one in the reverse charging transfer scheme list, take out the next secondary optimal reverse charging transfer scheme, and repeat step S72.

[0059] S74. Traverse the list of secondary optimal reverse charging transfer schemes in turn. If there is no effective transfer scheme, there is no secondary optimal reverse charging transfer scheme; if there is an effective transfer scheme, select the secondary optimal reverse charging transfer scheme with the smallest load shedding power of the secondary optimal virtual load as the secondary optimal reverse charging transfer scheme.

[0060] The present invention also provides a network reconstruction device for a reverse charging transmission network bus, including:

[0061] The list construction module constructs a list of feeders to be transferred, a list of un-searched nodes, a list of associated node devices, a list of disconnected switches, a list of feeders with recoverable power supply, a list of power-outage feeders, a list of basic transfer schemes, a list of reverse charging transfer schemes, and a list of sub-optimal reverse charging transfer schemes;

[0062] The search module, based on the distribution network node type, adopts a depth-first search logic to recursively search for the nodes and devices connected to the current feeder root node from the feeder root node in sequence. Set the feeder to which the nodes and devices in the current feeder search process belong as the current feeder and mark it as the energized state until the end of the power grid or the switch device with the remote signaling state being disconnected is reached;

[0063] The transfer scheme module adds all switch devices with the remote signaling state being disconnected to the list of disconnected switches. Based on the list of disconnected switches, searches for the transfer schemes of the feeders in the list of feeders to be transferred, adds the feeders with transfer schemes to the list of feeders with recoverable power supply, and adds the feeders lacking transfer schemes to the list of power-outage feeders;

[0064] The transfer scheme arrangement module constructs a virtual load, superimposes the power of the power-outage feeders in the list of power-outage feeders to obtain the total reverse charging load power of the virtual load in the network reconstruction partition. By arbitrarily selecting one transfer scheme from each transfer scheme of the feeders with recoverable power supply to form a basic transfer scheme, adds all basic transfer schemes to the list of basic transfer schemes according to permutation and combination;

[0065] The reverse charging transfer module sequentially selects the feeders in the list of feeders with recoverable power supply as the reverse charging feeders, mounts the virtual load to the head end of the reverse charging feeder to obtain a reverse charging transfer scheme and adds the reverse charging transfer scheme to the list of reverse charging transfer schemes;

[0066] The calculation module calculates the base-state line loss rate index and voltage qualification rate index of the distribution network before transfer, and calculates the base-state final score according to the weights of each index set initially. Sequentially operate the action switches corresponding to each transfer scheme in the list of reverse charging transfer schemes, set the virtual load, calculate the feeder power flow, count the line loss rate index and voltage qualification rate index after transfer, and calculate the final score of each reverse charging transfer scheme according to the set weights of each index; Set the reverse charging transfer schemes that cause over-limit after transfer as invalid transfer schemes, and screen the optimal reverse charging transfer scheme among the effective schemes;

[0067] Sub - optimal reverse charging transfer module: If there is no such optimal reverse charging transfer scheme, construct a sub - optimal virtual load, read the maximum number of load shedding counts stored in the commercial library, select less than the maximum number of load shedding counts of power - off feeders from the power - off feeder list as the load to be shed according to permutation and combination, superimpose the powers of the power - off feeders selected as the load to be shed to obtain the load shedding power of the sub - optimal virtual load in the network reconstruction partition, superimpose the powers of the power - off feeders other than the load to be shed to obtain the total reverse charging load power of the sub - optimal virtual load in the network reconstruction partition, and form sub - optimal transfer schemes by successively combining the total reverse charging powers of all sub - optimal virtual loads with the reverse charging transfer scheme list through the optimal load recombination method, and add all sub - optimal transfer schemes to the sub - optimal reverse charging transfer scheme list;

[0068] Sub - optimal reverse charging calculation module: Operate the action switches corresponding to each transfer scheme in the sub - optimal reverse charging transfer scheme list in sequence, set the sub - optimal virtual load, calculate the feeder power flow, set the sub - optimal reverse charging transfer scheme that causes over - limit after transfer as an invalid transfer scheme, and screen the effective scheme with the smallest load shedding power of the sub - optimal virtual load as the sub - optimal reverse charging transfer scheme to complete the network reconstruction of the reverse charging transmission network bus.

[0069] The present invention also provides a network reconstruction device for a transmission network bus, including:

[0070] A memory for storing a computer program;

[0071] A processor for implementing the steps of a network reconstruction method for a transmission network bus as described in any one of claims 1 to 8 when executing the computer program.

[0072] A network reconstruction method for a transmission network bus provided by the present invention uses a topology analysis method to perform topology search on each distribution network feeder. First, generate independent transfer schemes for each feeder; second, screen the power - off feeders lacking independent transfer schemes and summarize the total load power of the power - off feeders; finally, construct a virtual load and set the total load power of the power - off feeders as the power of the virtual load, respectively mount the virtual load to the head end of the feeder with an independent transfer scheme, and re - perform power flow calculation to count the feeder indicators. By independently transferring the feeders with independent transfer schemes and splicing the feeders without independent transfer schemes to the head end of the independently transferred feeders, simulate the power supply of the power - off feeder during main transformer maintenance through reverse charging of the distribution network, reasonably disperse the operation risks of each feeder after transfer, adopt a weighted index optimization method, reasonably give the optimal network reconstruction scheme of the distribution network that can improve the base - state indicators, and timely find the alternative scheme after the power supply feeder scheme of the grid bus becomes invalid due to over - limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] To more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0074] Figure 1 It is a flowchart of a method for network reconfiguration of a transmission network bus provided by the present invention;

[0075] Figure 2 It is a flowchart of topology search;

[0076] Figure 3 It is a flowchart of search for transfer supply scheme;

[0077] Figure 4 It is a flowchart of search for reverse charging transfer supply scheme;

[0078] Figure 5 It is a structural block diagram of a device for network reconfiguration of a transmission network bus provided by an embodiment of the present invention. Detailed implementation manners

[0079] The core of the present invention is to provide a method for network reconfiguration of a transmission network bus, which reasonably gives an optimal reconfiguration scheme for a distribution network that can improve the base state index, and reduces the large amount of resources invested in the traditional search for maintenance schemes.

[0080] To enable those skilled in the art to better understand the solution of the present invention, the following will further elaborate on the present invention in conjunction with the drawings and specific implementation manners. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0081] Please refer to Figure 1 , Figure 1 It is a flowchart of a method for network reconfiguration of a transmission network bus provided by the present invention; the specific operation steps are as follows:

[0082] Step S101: Construct a list of feeders to be transferred, a list of un-searched nodes, a list of associated node devices, a list of disconnected switches, a list of feeders that can resume power supply, a list of power-loss feeders, a list of basic transfer supply schemes, a list of reverse charging transfer supply schemes, and a list of sub-optimal reverse charging transfer supply schemes;

[0083] Construct a list of feeders to be transferred for storage of feeders to be transferred during the maintenance of main transformers in the transmission network; construct a list of feeders with recoverable power supply for storage of feeders with transfer schemes; construct a list of power-off feeders for storage of feeders lacking transfer schemes; construct a list of basic transfer schemes for storage of basic transfer schemes for combinations of feeders with recoverable power supply; construct a list of reverse charging transfer schemes for storage of reverse charging transfer schemes considering feeders lacking transfer schemes; construct a list of disconnected switches for storage of switchgear with remote signaling disconnected in the distribution network; construct a list of un-searched nodes for temporarily storing nodes to be searched during the topology search process; construct a list of feeders in the network reconstruction partition for storage of feeders included in the network reconstruction partition; construct a list of transfer schemes in the network reconstruction partition for storage of transfer schemes included in the network reconstruction partition;

[0084] Read the main transformer equipment information during the maintenance of the transmission network from the platform system. The main transformer equipment information includes 10kV busbars, busbar incoming switches, a list of main transformer power supply feeders, and a list of circuit breakers corresponding to the main transformer power supply feeders. Store the list of main transformer power supply feeders in the main transformer equipment information in a list of feeders to be transferred;

[0085] Read the distribution network equipment model from the database or other platform systems. The distribution network equipment model includes, but is not limited to, equipment node information (mainly including node number, node name, node type information), double-ended equipment information (mainly including equipment number, equipment name, equipment type, affiliated feeder, node one number, node two number), such as line segments, circuit breakers, disconnecting switches, and transformer windings, and single-ended equipment information (mainly including equipment number, equipment name, equipment type, affiliated feeder, node one number), such as loads, distributed power sources, and capacitor reactors. Among them, single-ended equipment is associated with a single equipment node, and double-ended equipment is associated with two equipment nodes. Hereinafter, the power grid model is simplified to nodes, single-ended equipment, and double-ended equipment. According to the equipment node number, add the single-ended equipment to the equipment list of its associated node, add the double-ended equipment to the equipment lists of its two associated nodes respectively, and generate an associated node equipment list for each node;

[0086] Read the remote signaling status of circuit breakers and disconnecting switches in the distribution network from the database or other platform systems (mainly including switch number, switch name, switch open or closed status information). Store the circuit breakers and disconnecting switches with remote signaling disconnected in the list of disconnected switches. The remote signaling status is mainly used to stop the search when encountering circuit breaker and disconnecting switch equipment with remote signaling disconnected during the topology search.

[0087] Step S102: Based on the types of distribution network nodes, using the depth-first search logic, recursively search for the nodes and devices connected to the current feeder root node from the feeder root node in sequence, set the feeder to which the nodes and devices in the current feeder search process belong to the current feeder, and mark it as the energized state until the end of the power grid or the switch device with the remote signal state being disconnected is reached;

[0088] As Figure 2 shown, generating the distribution network topology model includes:

[0089] S11. Judge the list of un-searched nodes. If the list of un-searched nodes is not empty, obtain the first node in the list of un-searched nodes as the node to be searched, and continue with step S12; if the list of un-searched nodes is empty, jump to step S18;

[0090] S12. Judge the node to be searched. If the type of the node to be searched is not the feeder root node, jump to step S17; if the type of the node to be searched is the feeder root node, set the feeder to which the node to be searched belongs to the feeder to be searched, and continue with step S13;

[0091] S13. Construct a current node list, add the node to be searched to the current node list; construct a list of subordinate nodes;

[0092] S14. Traverse the nodes in the current node list in sequence, set the feeder to which the node belongs to the feeder to be searched, set the feeder to which the node-connected device belongs to the feeder to be searched, and add the opposite-end node with the connected device being a two-terminal device to the list of subordinate nodes;

[0093] S15. Clear the current node list, add the nodes in the list of subordinate nodes to the current node list, and clear the list of subordinate nodes;

[0094] S16. Judge the current node list. If the current node list is empty, jump to step S17; if the current node list is not empty, repeat step S14;

[0095] S17. Judge the node to be searched. If the node to be searched is not the last node in the list of un-searched nodes, set the next node in the list of un-searched nodes as the node to be searched, and repeat step S12; if the node to be searched is the last node in the list of un-searched nodes, continue with step S18;

[0096] S18. The topology search of the feeder nodes ends.

[0097] Step S103: Add all switchgear with a remote signaling status of open to the open switch list. Based on the open switch list, search for the transfer supply plans for the feeders in the to-be-transferred feeders list, add the feeders with transfer supply plans to the recoverable power supply feeders list, and add the feeders lacking transfer supply plans to the power-loss feeders list;

[0098] As Figure 3 shown, the transfer supply plan search includes:

[0099] S21. Judge the open switch list. If the open switch list is empty, jump to S24. If the open switch list is not empty, take out the first switch in the open switch list, and obtain the head node and the tail node of the current open switch;

[0100] S22. Judge the energized status of the head node and the tail node. If the head node or the tail node is a power-loss node, jump to S24. If both the head node and the tail node are energized nodes, judge the feeders to which the head node and the tail node belong. If only one of the head node and the tail node belongs to the to-be-transferred feeders list, assume this feeder is the transferable feeder. Then the current open switch can transfer the transferable feeder to another feeder, and perform S23. If none of the head node and the tail node belongs to the to-be-transferred feeders list or both the feeder to which the head node belongs and the feeder to which the tail node belongs belong to the to-be-transferred feeders list, jump to S24;

[0101] S23. Add the transferable feeder to the recoverable power supply feeders list, take the current open switch as the recoverable power supply closed switch, take the circuit breaker corresponding to the transferable feeder as the recoverable power supply open switch, form a transfer supply plan for the transferable feeder with the recoverable power supply closed switch and the recoverable power supply open switch, and add this transfer supply plan to the transfer supply plan list of the transferable feeder;

[0102] S24. Judge the open switch. If the current open switch is not the last switch in the open switch list, obtain the next open switch in the open switch list from the open switch list, and return to S22. If the current open switch is the last switch in the open switch list, judge the feeders in the to-be-transferred feeders list, and add the feeders that do not belong to the recoverable power supply feeders list to a power-loss feeders list.

[0103] Step S104: Construct a virtual load, superimpose the powers of the power-loss feeders in the power-loss feeder list to obtain the total reverse charging load power of the virtual load in the network reconstruction partition. Arbitrarily select a transfer scheme from the transfer schemes of each recoverable power supply feeder to form a basic transfer scheme, and add all the basic transfer schemes to the basic transfer scheme list according to permutations and combinations;

[0104] Step S105: Sequentially select the feeders in the recoverable power supply feeder list as reverse charging feeders, mount the virtual load at the head end of the reverse charging feeder to obtain a reverse charging transfer scheme, and add the reverse charging transfer scheme to the reverse charging transfer scheme list;

[0105] As Figure 4 shown, the reverse charging transfer scheme search process includes:

[0106] S31. Judge the basic transfer scheme list. If the basic transfer scheme list is empty, jump to S33. If the basic transfer scheme list is not empty, take out the first basic transfer scheme in the basic transfer scheme list;

[0107] S32. Judge the recoverable power supply feeder list. If the recoverable power supply feeder list is empty, jump to S33. If the recoverable power supply feeder list is not empty, take out the first feeder in the recoverable power supply feeder list as the reverse charging feeder, set the head end node of the reverse charging feeder as the virtual load mounting node, set the bus incoming switch as the recoverable power supply disconnecting switch, take the transfer scheme belonging to the reverse charging feeder in the current basic transfer scheme as the scheme to be replaced, take the recoverable power supply closing switch in the scheme to be replaced as the recoverable power supply closing switch, form a reverse charging transfer scheme with the virtual load mounting node, the recoverable power supply disconnecting switch, and the recoverable power supply closing switch, add the other transfer schemes of the current basic transfer scheme that do not belong to the reverse charging feeder to the reverse charging transfer scheme, and add the reverse charging transfer scheme to the reverse charging transfer scheme list. Judge the reverse charging feeder. If the reverse charging feeder is not the last feeder in the recoverable power supply feeder list, take out the next feeder in the recoverable power supply feeder list as the reverse charging feeder, and repeat S32;

[0108] S33. Judge the current basic transfer scheme. If the current basic transfer scheme is not the last scheme in the basic transfer scheme list, take out the next basic transfer scheme in the basic transfer scheme list and repeat S32. If the current basic transfer scheme is the last scheme in the basic transfer scheme list, the reverse charging transfer scheme search ends.

[0109] Step S106: Calculate the base - state line - loss rate index and voltage qualification rate index of the distribution network before transfer - supply. According to the weights of each index set initially, calculate the base - state final score. Operate the action switches corresponding to each transfer - supply scheme in the reverse - charging transfer - supply scheme list in sequence, set the virtual load, calculate the feeder power flow, count the line - loss rate index and voltage qualification rate index after transfer - supply, calculate the final score of each reverse - charging transfer - supply scheme according to the set weights of each index, set the reverse - charging transfer - supply schemes that cause overload after transfer - supply as invalid transfer - supply schemes, and select the optimal reverse - charging transfer - supply scheme from the valid schemes;

[0110] S51. Obtain the reverse - charging transfer - supply scheme list, and judge the reverse - charging transfer - supply scheme list of the network reconstruction partition. If the reverse - charging transfer - supply scheme list of the network reconstruction partition is empty, jump to S54; if the reverse - charging transfer - supply scheme list of the network reconstruction partition is not empty, take out the first reverse - charging transfer - supply scheme;

[0111] S52. Calculate the index score of the current reverse - charging transfer - supply scheme, including:

[0112] S521. Close the recoverable - power - supply closing switch of the current reverse - charging transfer - supply scheme, open the recoverable - power - supply opening switch of the current reverse - charging transfer - supply scheme, set the virtual - load mounting node as the virtual - load mounting node of the current reverse - charging transfer - supply scheme, set the virtual - load power as the total reverse - charging load power, and calculate the feeder power flow after transfer - supply;

[0113] S522. Obtain all the lines and distribution transformers of the feeders in the feeder list to be transferred - supply. According to the power - flow result after transfer - supply, count the average line - loss rate of the distribution network after transfer - supply and the average voltage qualification rate of the distribution transformers after transfer - supply;

[0114] S523. Set the line - loss rate scoring weight and voltage qualification rate scoring weight respectively, and calculate the comprehensive score after transfer - supply of the current reverse - charging transfer - supply scheme in a weighted manner as:

[0115] Average line - loss rate score after transfer - supply × line - loss rate scoring weight+Average voltage qualification rate score of distribution transformers after transfer - supply × voltage qualification rate scoring weight, and calculate the final score after transfer - supply;

[0116] S524. Restore the recoverable - power - supply opening switch of the current reverse - charging transfer - supply scheme to the open state, restore the recoverable - power - supply closing switch of the current reverse - charging transfer - supply scheme to the closed state, and restore the virtual - load mounting node to be empty;

[0117] S525. Judge the feeder power flow after transfer - supply. If there is an overload in the feeder power flow, mark the current reverse - charging transfer - supply scheme as invalid;

[0118] S53. Judge the current reverse charging power transfer scheme. If the current reverse charging power transfer scheme is not the last one in the reverse charging power transfer scheme list, take out the next reverse charging power transfer scheme and repeat step S52;

[0119] S54. Traverse the reverse charging power transfer scheme list in sequence. If there is no effective power transfer scheme, there is no optimal reverse charging power transfer scheme; if there is an effective power transfer scheme, select the reverse charging power transfer scheme with the highest score as the optimal reverse charging power transfer scheme.

[0120] Step S107: If there is no such optimal reverse charging power transfer scheme, construct a sub-optimal virtual load, read the maximum number of load shedding numbers stored in the commercial library, and select less than the maximum number of load shedding numbers of out-of-power feeders in the out-of-power feeder list as the load to be shed according to permutation and combination. Superimpose the powers of the out-of-power feeders selected as the load to be shed to obtain the load shedding power of the sub-optimal virtual load in the network reconfiguration area. Superimpose the powers of the out-of-power feeders other than the load to be shed to obtain the total reverse charging load power of the sub-optimal virtual load in the network reconfiguration area. Use the optimal load recombination method to sequentially form sub-optimal power transfer schemes by combining the total reverse charging power of all sub-optimal virtual loads with the reverse charging power transfer scheme list, and add all sub-optimal power transfer schemes to the sub-optimal reverse charging power transfer scheme list;

[0121] S61. Obtain the out-of-power feeder list and set the list length as M;

[0122] S62. Read the maximum number of load shedding numbers N in the commercial library. If N≥M, then set N = M;

[0123] S63. Construct a sub-optimal virtual load and sequentially select n out-of-power feeders from the out-of-power feeder list as the load to be shed, where 1≤n and n≤N. According to permutation and combination, the sub-optimal virtual load can obtain kinds of load shedding schemes;

[0124] S64. Sum the powers of the feeders selected as the load to be shed in each load shedding scheme to obtain the load shedding power of the sub-optimal virtual load, and sum the powers of the feeders not selected as the load to be shed in each load shedding scheme to obtain the total reverse charging load power of the sub-optimal virtual load;

[0125] S65. Sequentially combine each load shedding scheme of the sub-optimal virtual load with the reverse charging power transfer scheme list to obtain a sub-optimal reverse charging power transfer scheme, and add it to the sub-optimal reverse charging power transfer scheme list.

[0126] Step S108: Operate the action switches corresponding to each transfer scheme in the sub-optimal reverse charging transfer scheme list in sequence, set the sub-optimal virtual load, calculate the feeder power flow, set the sub-optimal reverse charging transfer scheme that causes overload after transfer as an invalid transfer scheme, select the effective scheme with the smallest load shedding power of the sub-optimal virtual load as the sub-optimal reverse charging transfer scheme, and complete the network reconstruction of the reverse charging transmission network bus.

[0127] S71. Obtain the sub-optimal reverse charging transfer scheme list, and judge the sub-optimal reverse charging transfer scheme list. If the sub-optimal reverse charging transfer scheme list is empty, jump to S74; if the sub-optimal reverse charging transfer scheme list is not empty, take out the first sub-optimal reverse charging transfer scheme.

[0128] S72. Calculate the index score of the current sub-optimal reverse charging transfer scheme, including:

[0129] S721. Close the recoverable power supply closing switch of the current sub-optimal reverse charging transfer scheme, open the recoverable power supply opening switch of the current reverse charging transfer scheme, set the sub-optimal virtual load mounting node as the sub-optimal virtual load mounting node of the current reverse charging transfer scheme, set the sub-optimal virtual load power as the total reverse charging load power, and calculate the feeder power flow after transfer.

[0130] S722. Restore the recoverable power supply opening switch of the current sub-optimal reverse charging transfer scheme to the open state, restore the recoverable power supply closing switch of the current sub-optimal reverse charging transfer scheme to the closed state, and restore the sub-optimal virtual load mounting node to be empty.

[0131] S723. Judge the feeder power flow after transfer. If there is an overload in the feeder power flow, mark the current sub-optimal reverse charging transfer scheme as invalid.

[0132] S73. Judge the current sub-optimal reverse charging transfer scheme. If the current sub-optimal reverse charging transfer scheme is not the last one in the reverse charging transfer scheme list, take out the next sub-optimal reverse charging transfer scheme, and repeat step S72.

[0133] S74. Traverse the sub-optimal reverse charging transfer scheme list in sequence. If there is no effective transfer scheme, there is no sub-optimal reverse charging transfer scheme; if there is an effective transfer scheme, select the sub-optimal reverse charging transfer scheme with the smallest load shedding power of the sub-optimal virtual load as the sub-optimal reverse charging transfer scheme.

[0134] This embodiment provides a method for network reconstruction of transmission network buses. Aiming at the problem of main transformer maintenance in the operation of the transmission network, starting from the 10kV bus of the main transformer to be maintained in the transmission network, for the 10kV bus incoming line breaker disconnected due to main transformer maintenance and the distribution network feeders de-energized after operation, a topological analysis method is used to perform topological search on each distribution network feeder. First, an independent transfer scheme is generated for each feeder; secondly, the de-energized feeders lacking independent transfer schemes are screened, and the total load power of the de-energized feeders is summarized; finally, a virtual load is constructed, and the total load power of the de-energized feeders is set as the power of the virtual load. The virtual load is respectively mounted at the head end of the feeders with independent transfer schemes, and the power flow calculation is re-performed to count the feeder indicators. By independently transferring the feeders with independent transfer schemes and splicing the feeders without independent transfer schemes to the head end of the independently transferred feeders, it is simulated that the de-energized feeders during main transformer maintenance are powered by reverse charging through the distribution network, reasonably dispersing the operation risks of each feeder after transfer. Using the weighted index optimization method, the effective reverse charging transfer scheme is screened out according to whether overload is caused after transfer, and the optimal network reconstruction scheme of the distribution network that can improve the base state index is reasonably given; if there is no optimal reverse charging transfer scheme, some de-energized feeders are selected as the loads to be cut through permutation and combination to construct a sub-optimal reverse charging transfer scheme, and the sub-optimal reverse charging transfer scheme with the least load cut and effectiveness is selected to give the most reasonable network reconstruction scheme of the distribution network that can improve the base state index.

[0135] Based on the above embodiment, this embodiment elaborates on the scoring process of a method for network reconstruction of transmission network buses, which is as follows:

[0136] Calculating the final base state score includes:

[0137] S41. Obtain the feeders in the list of feeders to be transferred one by one;

[0138] S42. Obtain all the lines and distribution transformers of the feeders in the list of feeders to be transferred, and according to the base state power flow result, count the average line loss rate of the distribution network base state lines and the qualified rate of the average voltage of the distribution transformers in the base state;

[0139] S43. Respectively set the scoring weights for the line loss rate and the voltage qualification rate, and calculate the current base state comprehensive score in a weighted manner as: average line loss rate score of the base state lines × line loss rate scoring weight + average voltage qualification rate score of the base state distribution transformers × voltage qualification rate scoring weight, and calculate the final base state score.

[0140] The calculation of the average line loss rate score includes:

[0141] Count the average line loss rate of the base state lines. The value range of the line loss rate is [0, 100%]. The lower the line loss rate, the smaller the power grid loss. Set the average line loss rate score of the base state lines = 1 - the average line loss rate of the base state lines;

[0142] The calculation of the qualified rate score of the distribution transformer average voltage includes:

[0143] Statistical base state distribution transformer average voltage qualification rate, the value range of the distribution transformer average voltage qualification rate is [0, 100%]. The higher the voltage qualification rate, the higher the power grid voltage quality. Set the base state distribution transformer average voltage qualification rate score = base state distribution transformer average voltage qualification rate.

[0144] Calculating the final score of each reverse charging power transfer scheme includes:

[0145] S51. Obtain the power transfer scheme list, judge the reverse charging power transfer scheme list of the network reconstruction partition. If the reverse charging power transfer scheme list of the network reconstruction partition is empty, the score calculation ends. If the reverse charging power transfer scheme list of the network reconstruction partition is not empty, take out the first reverse charging power transfer scheme and calculate the index score of the current reverse charging power transfer scheme, including:

[0146] S511. Close the recoverable power supply closing switch of the current reverse charging power transfer scheme, open the recoverable power supply opening switch of the current reverse charging power transfer scheme, set the virtual load mounting node as the virtual load mounting node of the current reverse charging power transfer scheme, set the virtual load power as the total reverse charging load power, and calculate the feeder power flow after power transfer;

[0147] S512. Obtain all lines and distribution transformers of the feeders in the feeder list to be transferred. According to the power flow result after power transfer, statistically calculate the average line loss rate of the distribution network after power transfer and the qualified rate of the average voltage of the distribution transformer after power transfer;

[0148] S513. Respectively set the line loss rate score weight and the voltage qualification rate score weight, and calculate the comprehensive score after power transfer of the current reverse charging power transfer scheme in a weighted manner as:

[0149] Average line loss rate score after power transfer × line loss rate score weight + qualified rate score of the average voltage of the distribution transformer after power transfer × voltage qualification rate score weight, and calculate the final score after power transfer;

[0150] S514. Restore the recoverable power supply opening switch of the current reverse charging power transfer scheme to the open state, restore the recoverable power supply closing switch of the current reverse charging power transfer scheme to the closed state, and restore the virtual load mounting node to be empty;

[0151] S515. Judge the feeder power flow after power transfer. If there is a feeder power flow limit, mark the current reverse charging power transfer scheme as invalid;

[0152] S52. Judge the current reverse charging power transfer scheme. If the current reverse charging power transfer scheme is not the last one in the reverse charging power transfer scheme list, take out the next reverse charging power transfer scheme and repeat step S51;

[0153] By comparing the average line loss rate of the distribution network in the base state and after reconstruction, and the qualified rate of the average voltage of the distribution transformer, and comparing the scores of each reverse charging power transfer scheme, filter out the optimal reverse charging power transfer scheme for the network reconstruction partition of the reverse charging transmission network bus. The network reconstruction of the reverse charging transmission network bus includes:

[0154] Filter out the reverse charging power transfer schemes that meet the conditions for improving the base state indicators. The conditions for improving the base state indicators include: the average line loss rate after reconstruction is less than the average line loss rate of the distribution network in the base state, and the qualified rate of the average voltage of the distribution transformer after reconstruction is greater than the qualified rate of the average voltage of the distribution transformer in the base state of the distribution network;

[0155] Filter out the schemes that cause line overload after reconstruction from the reverse charging power transfer schemes that improve the base state indicators of the distribution network, and select the reverse charging power transfer scheme with the highest comprehensive reconstruction score as the optimal reverse charging power transfer scheme for the corresponding network reconstruction partition to complete the network reconstruction of the reverse charging transmission network bus;

[0156] If there is no optimal reverse charging power transfer scheme, select some power-off feeders as the load to be cut through permutation and combination to construct a sub-optimal reverse charging power transfer scheme; operate the action switches corresponding to each power transfer scheme in the sub-optimal reverse charging power transfer scheme list in turn, set the sub-optimal virtual load, calculate the feeder power flow, set the sub-optimal reverse charging power transfer scheme that causes overload after power transfer as an invalid power transfer scheme, select the sub-optimal reverse charging power transfer scheme with the least load shedding and effectiveness, and give the most reasonable network reconstruction scheme of the distribution network that can improve the base state indicators to complete the network reconstruction of the reverse charging transmission network bus.

[0157] This embodiment provides a method for network reconstruction of a transmission network bus, which simulates the power supply of a power-off feeder during main transformer maintenance through reverse charging of the distribution network, reasonably disperses the operation risks of each feeder after power transfer, and uses a weighted index optimization method to reasonably give the optimal network reconstruction scheme of the distribution network that can improve the base state indicators.

[0158] Please refer to Figure 5 , Figure 5 which is the structural block diagram of a network reconstruction device for a transmission network bus provided by an embodiment of the present invention; the specific device may include:

[0159] A list construction module 100 constructs a list of feeders to be transferred, a list of un-searched nodes, a list of associated node devices, a list of disconnected switches, a list of feeders that can be restored to power, a list of power-off feeders, a list of basic power transfer schemes, a list of reverse charging power transfer schemes, and a list of sub-optimal reverse charging power transfer schemes;

[0160] The search module 200, based on the distribution network node type, adopts the depth-first search logic, and sequentially searches for the nodes and devices connected to the current feeder root node from the feeder root node in a recursive manner. The feeder to which the nodes and devices in the current feeder search process belong is set as the current feeder and marked as the energized state until the end of the power grid or the switch device with the remote signal state of off is searched;

[0161] The transfer scheme module 300 adds all the switch devices with the remote signal state of off to the off-switch list. Based on the off-switch list, it searches for the transfer schemes of the feeders in the to-be-transferred feeder list, adds the feeders with transfer schemes to the recoverable power supply feeder list, and adds the feeders lacking transfer schemes to the power-loss feeder list;

[0162] The transfer scheme arrangement module 400 constructs a virtual load, superimposes the powers of the power-loss feeders in the power-loss feeder list to obtain the total reverse charging load power of the virtual load in the network reconstruction partition. By arbitrarily selecting a transfer scheme from each transfer scheme of the recoverable power supply feeders to form a basic transfer scheme, all the basic transfer schemes are added to the basic transfer scheme list according to permutation and combination;

[0163] The reverse charging transfer module 500 sequentially selects the feeders in the recoverable power supply feeder list as the reverse charging feeders, mounts the virtual load to the head end of the reverse charging feeder to obtain a reverse charging transfer scheme and adds the reverse charging transfer scheme to the reverse charging transfer scheme list;

[0164] The calculation module 600 calculates the base state line loss rate index and voltage qualification rate index of the distribution network before transfer, and calculates the base state final score according to the weights of each index set initially. It sequentially operates the action switches corresponding to each transfer scheme in the reverse charging transfer scheme list, sets the virtual load, calculates the feeder power flow, counts the line loss rate index and voltage qualification rate index after transfer, and calculates the final score of each reverse charging transfer scheme according to the set weights of each index; Sets the reverse charging transfer schemes that cause over-limit after transfer as invalid transfer schemes, and filters out the optimal reverse charging transfer scheme among the valid schemes;

[0165] Sub - optimal reverse charging power transfer module 700. If there is no such optimal reverse charging power transfer scheme, construct a sub - optimal virtual load, read the maximum number of load shedding counts stored in the commercial library, select less than the maximum number of load shedding counts of de - energized feeders from the list of de - energized feeders as the load to be shed according to permutation and combination, superimpose the powers of the de - energized feeders selected as the load to be shed to obtain the load shedding power of the sub - optimal virtual load in the network reconstruction partition, superimpose the powers of the de - energized feeders other than the load to be shed to obtain the total reverse charging load power of the sub - optimal virtual load in the network reconstruction partition, and form sub - optimal power transfer schemes by successively combining the total reverse charging powers of all sub - optimal virtual loads with the reverse charging power transfer scheme list through the optimal load recombination method. Add all sub - optimal power transfer schemes to the sub - optimal reverse charging power transfer scheme list;

[0166] Sub - optimal reverse charging calculation module 800. Operate the action switches corresponding to each power transfer scheme in the sub - optimal reverse charging power transfer scheme list in sequence, set the sub - optimal virtual load, calculate the feeder power flow, set the sub - optimal reverse charging power transfer scheme that causes over - limit after power transfer as an invalid power transfer scheme, and screen the effective scheme with the smallest load shedding power of the sub - optimal virtual load as the sub - optimal reverse charging power transfer scheme to complete the network reconstruction of the reverse charging transmission bus.

[0167] A network reconstruction device for a transmission network bus in this embodiment is used to implement the foregoing network reconstruction method for a transmission network bus. Therefore, the specific implementation manners in a network reconstruction device for a transmission network bus can be seen in the embodiment part of the foregoing network reconstruction method for a transmission network bus. For example, the list construction module 100, the search module 200, the power transfer scheme module 300, the power transfer scheme arrangement module 400, the reverse charging power transfer module 500, the calculation module 600, the sub - optimal reverse charging power transfer module 700, and the sub - optimal reverse charging calculation module 800 are respectively used to implement steps S101, S102, S103, S104, S105, S106, S107, and S108 in the foregoing network reconstruction method for a transmission network bus. Therefore, the specific implementation manners can refer to the descriptions of the corresponding various part embodiments and will not be repeated here.

[0168] A specific embodiment of the present invention also provides a network reconstruction device for a transmission network bus, including: a memory for storing a computer program; a processor for implementing the steps of the foregoing network reconstruction method for a transmission network bus when executing the computer program.

[0169] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple. For the relevant parts, refer to the description in the method part.

[0170] Those skilled in the art may further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered as exceeding the scope of the present invention.

[0171] The steps of the method or algorithm described in combination with the embodiments disclosed herein can be directly implemented by hardware, software modules executed by a processor, or a combination of both. The software modules can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0172] The above has introduced in detail a method, apparatus, device, and computer storage medium for network reconstruction of a transmission network bus provided by the present invention. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A method for network reconfiguration of a transmission network bus, characterized in that, Including: Construct a list of feeders to be transferred, a list of un-searched nodes, a list of associated node devices, a list of disconnected switches, a list of feeders with recoverable power supply, a list of power-loss feeders, a list of basic transfer schemes, a list of reverse charging transfer schemes, and a list of sub-optimal reverse charging transfer schemes; Based on the node types of the distribution network, adopt the depth-first search logic, and sequentially search for the nodes and devices connected to the current feeder root node from the feeder root node in a recursive manner. Set the feeder to which the nodes and devices in the current feeder search process belong as the current feeder, and mark it as the energized state until the end of the power grid or the switch device with the remote signaling state of disconnected is reached; Add all switch devices with the remote signaling state of disconnected to the list of disconnected switches. Based on the list of disconnected switches, search for the transfer schemes of the feeders in the list of feeders to be transferred, add the feeders with transfer schemes to the list of feeders with recoverable power supply, and add the feeders lacking transfer schemes to the list of power-loss feeders; Construct a virtual load, superimpose the powers of the power-loss feeders in the list of power-loss feeders to obtain the total reverse charging load power of the virtual load in the network reconstruction partition. By arbitrarily selecting one transfer scheme from each transfer scheme of the feeders with recoverable power supply to form a basic transfer scheme, add all basic transfer schemes to the list of basic transfer schemes according to permutations and combinations; Sequentially select the feeders in the list of feeders with recoverable power supply as reverse charging feeders, mount the virtual load at the head end of the reverse charging feeder to obtain a reverse charging transfer scheme, and add the reverse charging transfer scheme to the list of reverse charging transfer schemes; Calculate the base-state line loss rate index and voltage qualification rate index of the distribution network before transfer, and calculate the base-state final score according to the weights of each index set initially. Sequentially operate the action switches corresponding to each transfer scheme in the list of reverse charging transfer schemes, set the virtual load, calculate the feeder power flow, count the line loss rate index and voltage qualification rate index after transfer, and calculate the final score of each reverse charging transfer scheme according to the set weights of each index. Set the reverse charging transfer schemes that cause over-limit after transfer as invalid transfer schemes, and screen the optimal reverse charging transfer scheme from the valid schemes; If there is no such optimal reverse charging transfer scheme, construct a sub-optimal virtual load, read the maximum number of load shedding from the commercial library storage, select less than the maximum number of power-loss feeders in the list of power-loss feeders as the load to be shed according to permutations and combinations, superimpose the powers of the power-loss feeders selected as the load to be shed to obtain the load shedding power of the sub-optimal virtual load in the network reconstruction partition, superimpose the powers of the power-loss feeders other than the load to be shed to obtain the total reverse charging load power of the sub-optimal virtual load in the network reconstruction partition, and sequentially form sub-optimal transfer schemes by combining all the total reverse charging powers of the sub-optimal virtual loads with the list of reverse charging transfer schemes, and add all sub-optimal transfer schemes to the list of sub-optimal reverse charging transfer schemes; Operate the action switches corresponding to each transfer scheme in the sub-optimal reverse charging transfer scheme list in sequence, set the sub-optimal virtual load, calculate the feeder power flow, set the sub-optimal reverse charging transfer scheme that causes over-limit after transfer as an invalid transfer scheme, screen the effective scheme with the smallest load shedding power of the sub-optimal virtual load as the sub-optimal reverse charging transfer scheme, and complete the network reconstruction of the reverse charging transmission network bus.

2. The network reconstruction method for the transmission network bus as described in claim 1, characterized in that, Based on the distribution network node type, adopt the depth-first search logic, and search for the nodes and devices connected to the current feeder root node recursively from the feeder root node in sequence. Set the feeder to which the nodes and devices in the current feeder search process belong as the current feeder, and mark it as the energized state until the end of the power grid or the switch device with the remote signal state of off is searched, including: S11. Judge the list of un-searched nodes. If the list of un-searched nodes is not empty, obtain the first node in the list of un-searched nodes as the node to be searched, and continue to step S12; if the list of un-searched nodes is empty, jump to step S18; S12. Judge the node to be searched. If the type of the node to be searched is not the feeder root node, jump to step S17; if the type of the node to be searched is the feeder root node, set the feeder to which the node to be searched belongs as the feeder to be searched, and continue to step S13; S13. Construct a current node list, add the node to be searched to the current node list; construct a lower-level node list; S14. Traverse the nodes in the current node list in sequence, set the feeder to which the node belongs as the feeder to be searched, set the feeder to which the node connection device belongs as the feeder to be searched, and add the opposite-end node of the connection device that is a two-terminal device to the lower-level node list; S15. Clear the current node list, add the nodes in the lower-level node list to the current node list, and clear the lower-level node list; S16. Judge the current node list. If the current node list is empty, jump to step S17. If the current node list is not empty, repeat step S14; S17. Judge the node to be searched. If the node to be searched is not the last node in the list of un-searched nodes, set the next node in the list of un-searched nodes as the node to be searched, and repeat step S12; if the node to be searched is the last node in the list of un-searched nodes, continue to step S18; S18. The feeder node topology search ends.

3. The network reconstruction method of the transmission network bus according to claim 1, characterized in that, Add all switch devices with the remote signal state of off to the list of disconnected switches. Based on the list of disconnected switches, search for the transfer schemes of the feeders in the list of feeders to be transferred, add the feeders with transfer schemes to the list of feeders that can be restored to power, and add the feeders lacking transfer schemes to the list of power-loss feeders: S21. Judge the list of disconnected switches. If the list of disconnected switches is empty, jump to S24. If the list of disconnected switches is not empty, take out the first switch in the list of disconnected switches, and obtain the head node and the tail node of the current disconnected switch; S22. Judge the energized states of the head node and the tail node. If the head node or the tail node is a de-energized node, jump to S24. If both the head node and the tail node are energized nodes, judge the feeders to which the head node and the tail node belong. If only one of the head node and the tail node belongs to the feeder list to be transferred, assume this feeder is the transferable feeder. Then the current disconnecting switch can transfer the transferable feeder to another feeder, and perform S23. If none of the feeders to which the head node and the tail node belong belongs to the feeder list to be transferred or both the feeder to which the head node belongs and the feeder to which the tail node belongs belong to the feeder list to be transferred, jump to S24; S23. Add the transferable feeder to the list of feeders for which power can be restored, use the current disconnecting switch as the closing switch for power restoration, use the circuit breaker corresponding to the transferable feeder as the opening switch for power restoration, form a transfer plan for the transferable feeder with the closing switch for power restoration and the opening switch for power restoration, and add this transfer plan to the transfer plan list of the transferable feeder; S24. Judge the disconnecting switch. If the current disconnecting switch is not the last switch in the disconnecting switch list, obtain the next disconnecting switch in the disconnecting switch list from the disconnecting switch list and return to S22. If the current disconnecting switch is the last switch in the disconnecting switch list, judge the feeders in the feeder list to be transferred, and add the feeders that do not belong to the list of feeders for which power can be restored to a list of de-energized feeders.

4. The network reconstruction method for the transmission network bus according to claim 1, characterized in that, The steps of successively selecting the feeders in the list of feeders for which power can be restored as the reverse charging feeders, mounting the virtual load at the head end of the reverse charging feeder, obtaining the reverse charging transfer plan and adding the reverse charging transfer plan to the reverse charging transfer plan list include: S31. Judge the basic transfer plan list. If the basic transfer plan list is empty, jump to S33. If the basic transfer plan list is not empty, take out the first basic transfer plan in the basic transfer plan list; S32. Judge the list of feeders with recoverable power supply. If the list of feeders with recoverable power supply is empty, jump to S33. If the list of feeders with recoverable power supply is not empty, take the first feeder in the list of feeders with recoverable power supply as the reverse charging feeder, set the head node of the reverse charging feeder as the virtual load mounting node, take the bus incoming switch as the recoverable power supply disconnection switch, take the transfer scheme belonging to the reverse charging feeder in the current basic transfer scheme as the scheme to be replaced, take the recoverable power supply closing switch in the scheme to be replaced as the recoverable power supply closing switch, form a reverse charging transfer scheme with the virtual load mounting node, the recoverable power supply disconnection switch, and the recoverable power supply closing switch, add the other transfer schemes in the current basic transfer scheme that do not belong to the reverse charging feeder to the reverse charging transfer scheme, add the reverse charging transfer scheme to the reverse charging transfer scheme list, judge the reverse charging feeder. If the reverse charging feeder is not the last feeder in the list of feeders with recoverable power supply, take the next feeder in the list of feeders with recoverable power supply as the reverse charging feeder, and then repeat S32; S33. Judge the current basic transfer scheme. If the current basic transfer scheme is not the last scheme in the basic transfer scheme list, take out the next basic transfer scheme in the basic transfer scheme list and repeat S32. If the current basic transfer scheme is the last scheme in the basic transfer scheme list, the search for the reverse charging transfer scheme ends.

5. The network reconstruction method for the transmission network bus according to claim 1, characterized in that, The calculation of the base state line loss rate index and voltage qualification rate index of the distribution network before transfer, and the calculation of the base state final score according to the initial set weights of each index include: S41. Obtain the feeders in the list of feeders to be transferred one by one; S42. Obtain all the lines and distribution transformers of the feeders in the list of feeders to be transferred, and according to the base state power flow result, count the average line loss rate of the distribution network in the base state and the average voltage qualification rate of the distribution transformers in the base state; S43. Respectively set the line loss rate scoring weight and voltage qualification rate scoring weight, and calculate the current base state comprehensive score in a weighted manner as: average line loss rate score of the base state lines × line loss rate scoring weight + average voltage qualification rate score of the base state distribution transformers × voltage qualification rate scoring weight, and calculate the base state final score.

6. The network reconstruction method for the transmission network bus according to claim 1, characterized in that, Operate the action switches corresponding to each transfer scheme in the reverse charging transfer scheme list in turn, set the virtual load, calculate the feeder power flow, count the line loss rate index and voltage qualification rate index after transfer, and calculate the final score of each reverse charging transfer scheme according to the set weights of each index. Set the reverse charging transfer scheme that causes over-limit after transfer as an invalid transfer scheme. The screening of the optimal reverse charging transfer scheme among the effective schemes includes: S51. Obtain the reverse charging transfer scheme list, judge the reverse charging transfer scheme list of the network reconstruction partition. If the reverse charging transfer scheme list of the network reconstruction partition is empty, jump to S54. If the reverse charging transfer scheme list of the network reconstruction partition is not empty, take out the first reverse charging transfer scheme; S52. Calculate the index score of the current reverse charging transfer scheme, including: S521. Close the recoverable power supply closing switch of the current reverse charging power transfer scheme, open the recoverable power supply opening switch of the current reverse charging power transfer scheme, set the virtual load mounting node as the virtual load mounting node of the current reverse charging power transfer scheme, set the virtual load power as the total reverse charging load power, and calculate the feeder power flow after power transfer; S522. Obtain all lines and distribution transformers of the feeders in the list of feeders to be transferred. According to the power flow result after power transfer, calculate the average line loss rate of the distribution network after power transfer and the qualified rate of the average voltage of the distribution transformers after power transfer; S523. Respectively set the line loss rate scoring weight and the voltage qualified rate scoring weight, and calculate the comprehensive score after power transfer of the current reverse charging power transfer scheme in a weighted manner as follows: Average line loss rate score after power transfer × line loss rate scoring weight + Average voltage qualified rate score of distribution transformers after power transfer × voltage qualified rate scoring weight, and calculate the final score after power transfer; S524. Restore the recoverable power supply opening switch of the current reverse charging power transfer scheme to the open state, restore the recoverable power supply closing switch of the current reverse charging power transfer scheme to the closed state, and restore the virtual load mounting node to empty; S525. Judge the feeder power flow after power transfer. If there is a feeder power flow limit, mark the current reverse charging power transfer scheme as invalid; S53. Judge the current reverse charging power transfer scheme. If the current reverse charging power transfer scheme is not the last one in the reverse charging power transfer scheme list, take out the next reverse charging power transfer scheme and repeat step S52; S54. Traverse the reverse charging power transfer scheme list in turn. If there is no effective power transfer scheme, there is no optimal reverse charging power transfer scheme; if there is an effective power transfer scheme, select the reverse charging power transfer scheme with the highest score as the optimal reverse charging power transfer scheme.

7. The network reconstruction method of the transmission network bus according to claim 1, characterized in that, If there is no such optimal reverse charging power transfer scheme, construct a sub-optimal virtual load, read the maximum number of load shedding stored in the commercial library, and select less than the maximum number of load shedding feeders in the list of power outage feeders as the load to be shed according to permutation and combination. Add up the powers of the power outage feeders selected as the load to be shed to obtain the load shedding power of the sub-optimal virtual load in the network reconstruction area. Add up the powers of the power outage feeders other than the load to be shed to obtain the total reverse charging load power of the sub-optimal virtual load in the network reconstruction area. Use the optimal load recombination method to form sub-optimal power transfer schemes in turn with the total reverse charging power of all sub-optimal virtual loads and the reverse charging power transfer scheme list, and add all sub-optimal power transfer schemes to the sub-optimal reverse charging power transfer scheme list, including: S61. Obtain the list of power outage feeders and set the list length as M; S62. Read the maximum number of load shedding N in the commercial library. If N≥M, then set N = M; S63. Construct a sub-optimal virtual load, and successively select n power-loss feeders from the list of power-loss feeders as the loads to be shed, where 1 ≤ n and n ≤ N. According to permutations and combinations, types of load-shedding schemes can be obtained; S64. Respectively sum up the powers of the feeders selected as the load to be shed in each load shedding scheme to obtain the load shedding power of the sub-optimal virtual load, and sum up the powers of the feeders not selected as the load to be shed in each load shedding scheme to obtain the total reverse charging load power of the sub-optimal virtual load; S65. Combine each load shedding plan of the sub-optimal virtual load with the reverse charging transfer plan list in sequence to obtain the sub-optimal reverse charging transfer plan, and add it to the sub-optimal reverse charging transfer plan list.

8. The network reconstruction method for the transmission network bus according to claim 1, wherein, The operations of sequentially operating the action switches corresponding to each transfer plan in the sub-optimal reverse charging transfer plan list, setting the sub-optimal virtual load, calculating the feeder power flow, setting the sub-optimal reverse charging transfer plan that causes overload after transfer as an invalid transfer plan, and screening the effective plan with the smallest load shedding power of the sub-optimal virtual load as the sub-optimal reverse charging transfer plan, and completing the network reconstruction of the reverse charging transmission network bus include: S71. Obtain the sub-optimal reverse charging transfer plan list, judge the sub-optimal reverse charging transfer plan list. If the sub-optimal reverse charging transfer plan list is empty, jump to S74; if the sub-optimal reverse charging transfer plan list is not empty, take out the first sub-optimal reverse charging transfer plan. S72. Calculate the index score of the current sub-optimal reverse charging transfer plan, including: S721. Close the recoverable power supply closing switch of the current sub-optimal reverse charging transfer plan, open the recoverable power supply opening switch of the current reverse charging transfer plan, set the sub-optimal virtual load mounting node as the sub-optimal virtual load mounting node of the current reverse charging transfer plan, set the sub-optimal virtual load power as the total reverse charging load power, and calculate the feeder power flow after transfer. S722. Restore the recoverable power supply opening switch of the current sub-optimal reverse charging transfer plan to the open state, restore the recoverable power supply closing switch of the current sub-optimal reverse charging transfer plan to the closed state, and restore the sub-optimal virtual load mounting node to be empty. S723. Judge the feeder power flow after transfer. If there is an overload in the feeder power flow, mark the current sub-optimal reverse charging transfer plan as invalid. S73. Judge the current sub-optimal reverse charging transfer plan. If the current sub-optimal reverse charging transfer plan is not the last one in the reverse charging transfer plan list, take out the next sub-optimal reverse charging transfer plan, and repeat step S72. S74. Traverse the sub-optimal reverse charging transfer plan list in sequence. If there is no effective transfer plan, there is no sub-optimal reverse charging transfer plan; if there is an effective transfer plan, select the sub-optimal reverse charging transfer plan with the smallest load shedding power of the sub-optimal virtual load as the sub-optimal reverse charging transfer plan.

9. A network reconstruction device for a reverse charging power transmission network bus, characterized in that, Including: List construction module, constructing a list of feeders to be transferred, a list of un-searched nodes, a list of associated node devices, a list of disconnect switches, a list of recoverable power supply feeders, a list of power-loss feeders, a list of basic transfer plans, a list of reverse charging transfer plans, and a list of sub-optimal reverse charging transfer plans. Search module, based on the distribution network node type, using the depth-first search logic, sequentially search the nodes and devices connected to the current feeder root node from the feeder root node in a recursive manner, set the feeder to which the nodes and devices in the current feeder search process belong as the current feeder, and mark it as the energized state until the end of the power grid or the switch device with the remote signaling state being open is reached. The transfer power supply plan module adds all switch devices with a remote signal status of off to the off-switch list. Based on the off-switch list, it searches for the transfer power supply plans of the feeders in the to-be-transferred feeders list, adds the feeders with existing transfer power supply plans to the recoverable power supply feeders list, and adds the feeders lacking transfer power supply plans to the power-loss feeders list; The transfer power supply plan arrangement module constructs a virtual load, superimposes the powers of the power-loss feeders in the power-loss feeders list to obtain the total reverse charging load power of the virtual load in the network reconstruction partition. By arbitrarily selecting one transfer power supply plan from each transfer power supply plan of the recoverable power supply feeders to form a basic transfer power supply plan, all basic transfer power supply plans are added to the basic transfer power supply plan list according to permutations and combinations; The reverse charging transfer power supply module sequentially selects the feeders in the recoverable power supply feeders list as reverse charging feeders, mounts the virtual load at the head end of the reverse charging feeder to obtain a reverse charging transfer power supply plan and adds the reverse charging transfer power supply plan to the reverse charging transfer power supply plan list; The calculation module calculates the base state line loss rate index and voltage qualification rate index of the distribution network before transfer, and calculates the base state final score according to the weights of each index set initially. It sequentially operates the action switches corresponding to each transfer power supply plan in the reverse charging transfer power supply plan list, sets the virtual load, calculates the feeder power flow, counts the line loss rate index and voltage qualification rate index after transfer, and calculates the final score of each reverse charging transfer power supply plan according to the set weights of each index; Sets the reverse charging transfer power supply plans that cause over-limit after transfer as invalid transfer power supply plans, and screens the optimal reverse charging transfer power supply plan from the valid plans; The sub-optimal reverse charging transfer power supply module, if there is no such optimal reverse charging transfer power supply plan, constructs a sub-optimal virtual load, reads the maximum number of load shedding units stored in the commercial library, and selects less than the maximum number of load shedding units of the power-loss feeders in the power-loss feeders list as the load to be shed according to permutations and combinations. Superimpose the powers of the selected power-loss feeders to be shed to obtain the load shedding power of the sub-optimal virtual load in the network reconstruction partition. Superimpose the powers of the power-loss feeders other than the load to be shed to obtain the total reverse charging load power of the sub-optimal virtual load in the network reconstruction partition. Use the optimal load reconfiguration method to sequentially form sub-optimal transfer power supply plans with all the total reverse charging powers of the sub-optimal virtual loads and the reverse charging transfer power supply plan list, and add all sub-optimal transfer power supply plans to the sub-optimal reverse charging transfer power supply plan list; The sub-optimal reverse charging calculation module sequentially operates the action switches corresponding to each transfer power supply plan in the sub-optimal reverse charging transfer power supply plan list, sets the sub-optimal virtual load, calculates the feeder power flow, sets the sub-optimal reverse charging transfer power supply plans that cause over-limit after transfer as invalid transfer power supply plans, and screens the valid plan with the smallest load shedding power of the sub-optimal virtual load as the sub-optimal reverse charging transfer power supply plan to complete the network reconstruction of the reverse charging transmission network bus.

10. A network reconfiguration device for a transmission network bus, characterized in that, It includes: A memory for storing computer programs; A processor for implementing the steps of a network reconstruction method for a transmission network bus as described in any one of claims 1 to 8 when executing the computer program.

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