An automated method and apparatus for distributed feeders

Abstract

The application discloses an automatic method and device for a distributed feeder, comprising: dividing a power grid into a plurality of topological control areas with a feeder as a minimum unit, and setting an intelligent unit as a topological intelligent unit in each topological control area; dividing each topological control area into a plurality of switch control areas according to the number of actions of a tie switch, and setting an intelligent unit as a switch intelligent unit in each switch control area; the switch intelligent unit monitors the circuit state of the switch and the circuit at both ends of the switch in the area associated with the switch in real time, and when an abnormality of equipment is monitored, the switch intelligent unit sends abnormality information to the topological intelligent unit of the area; and the topological intelligent unit judges the fault position according to the abnormality information and determines a transfer line, thereby avoiding overload and heavy load problems caused by the access of distributed energy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution automation, in particular to an automation method and device for a distributed feeder. BACKGROUND

[0002] Feeder automation is widely used in distribution networks to achieve grid monitoring. By analyzing the measurement information of devices, switches, etc., appropriate responses are made to maintain the safe and stable operation of the grid.

[0003] Most of the feeder automation applications currently in operation are centralized. Sensors collect operating information during system operation, which is centrally aggregated to the distribution network master station through related devices such as gateway machines, etc. The master station analyzes the received information to determine the cause of the fault and issues a disposal instruction for the fault from the master station. Due to the rapid development of the power grid, the grid structure is becoming increasingly complex, and the amount of operating data generated is also growing exponentially. This centralized processing method is under tremendous pressure for information processing and transmission. In addition, for large-scale power grids, the real-time performance of centralized processing cannot be guaranteed, and the judgment and processing speed is slow.

[0004] Distributed feeder automation is an important method to solve the above problems. Distributed feeder automation discards the centralized processing method and makes decisions directly at the distribution terminal by connecting intelligent control units in the grid, greatly improving efficiency. However, distributed feeder automation is still in its infancy, and most of the time, an intelligent control unit is set for each or two switches to monitor the operating status of the corresponding switch and its vicinity. There is no optimal intelligent control unit distribution strategy, which will cause redundancy of intelligent units and increase communication overhead between intelligent units. In addition, due to the dynamic changes in the topology of the power grid, the intelligent unit also needs to save the topology information of the points in the neighborhood centered on the switch it monitors, and maintain the above information through a layer-by-layer iterative inquiry method. This dynamic updating method of topology information will increase the communication pressure of the grid. When a fault occurs, multiple inquiries and responses are also required to lock the fault. When the grid is at peak time, the number of communications is large, and the response time will increase accordingly. More importantly, the connection of distributed energy makes the operation of the grid more complex. With its participation, the direction of current tends to be complex. The existing method does not provide an effective disposal strategy for the connection of distributed energy. SUMMARY

[0005] To solve the above problems, the present application provides an automation method for a distributed feeder, comprising:

[0006] Divide the grid into multiple topology control areas with the feeder as the minimum unit, and set an intelligent unit as a topology intelligent unit in each topology control area;

[0007] According to the number of actions of the tie switch, each topology control area is divided into a plurality of switch control areas, and one intelligent unit is arranged in each switch control area as a switch intelligent unit;

[0008] The switch intelligent unit monitors the circuit state of the switch associated therewith and the circuit at both ends thereof in real time, and when an abnormality of equipment is monitored, the switch intelligent unit sends abnormality information to the topology intelligent unit of the area; the topology intelligent unit judges the fault position according to the abnormality information and determines the transfer line.

[0009] Further, it further comprises:

[0010] The topology intelligent unit saves the power grid topology information of the area.

[0011] Further, it further comprises:

[0012] The switch intelligent unit saves the power grid operation data of the monitored switch and the switch control area.

[0013] Further, the power grid is divided into a plurality of topology control areas with a feeder as the minimum unit, comprising:

[0014] The selectivity C of the feeder is calculated, and the feeders are evenly distributed in the plurality of topology control areas according to the selectivity C, and the calculation formula of the selectivity C of the feeder is specifically:

[0015]

[0016] Wherein, P represents the tie strength of the feeder, Q represents the load strength of the feeder, Qmax represents the maximum load strength of the feeder, Qmin represents the minimum load strength of the feeder, Pmax represents the maximum tie strength of the feeder, and Pmin represents the minimum tie strength of the feeder.

[0017] According to the topology density, the tie switch density and the line stability balance principle of each topology control area, the number of tie switches and the number of topology control areas of each topology control area are determined, and the calculation formula of the topology density and the tie switch density of each topology control area is specifically:

[0018]

[0019]

[0020] Wherein, td is the topology density of each topology control area, sd is the tie switch density, N s represents the number of tie switches in the entire area, C N represents the number of currently divided areas; D represents the number of switches in the entire area, N total represents the number of points in a certain area, Etotal This indicates the number of edges in the region.

[0021] Furthermore, based on the number of times the tie switch is activated, each topology control area is divided into multiple switch control areas, including:

[0022] Using the average number of monthly actions as a reference, for each feeder, starting with the switch with the highest average number of monthly actions, if the average number of actions of that switch is greater than the overall average number of actions, then an independent smart switch unit is set up for that switch.

[0023] If the average number of actions of a switch is less than the overall average number of actions, then switches in the neighborhood are added sequentially until the average number of actions is greater than or equal to the overall average number of actions. Then, an independent smart switch unit is set up for all switches.

[0024] Furthermore, it also includes:

[0025] During power grid operation, the topology intelligent unit and the switch intelligent unit within their respective topology control area monitor the topology changes in the topology control area in real time.

[0026] When a switch change occurs in the topology control area, the switch intelligent unit sends topology change information to the topology intelligent unit, and the topology intelligent unit updates the power grid topology information.

[0027] Furthermore, the topology intelligent unit, based on the anomaly information, determines the fault location and identifies the transfer line, including:

[0028] There are three types of power transfer routes: interconnected distributed energy lines with low load pressure, load space lines in the same region, and lines under the jurisdiction of topological intelligent units outside the current region.

[0029] By comparing the lines, the load capacity LA can be increased. The topology intelligent unit is first connected to the switching intelligent unit sU of the distributed power switch. mn Send a request; when LA > 1, sU mn Control the switch and send a consent request to the topological intelligent unit;

[0030] If distributed energy sources cannot be connected, the topology intelligent unit sends a signal to the adjacent distributed power switch's switching intelligent unit sU. mn Sending a request, the switch intelligent unit SU can provide connectivity. mn Upon receiving a request, the system queries its maintained LA. If LA > 0.5, it replies with an agreement to the request. This occurs when the topology intelligent unit receives a request from any switch intelligent unit sU. mn In response, the switch intelligent unit sU is sent. mnSend switch position command, other response reply is not replied.

[0031] The application also provides an automation device for a distributed feeder, comprising:

[0032] A topology intelligent unit setting module is configured to divide the power grid into a plurality of topology control areas with the feeder as the minimum unit, and set one intelligent unit as a topology intelligent unit in each topology control area;

[0033] A switch intelligent unit setting module is configured to divide each topology control area into a plurality of switch control areas according to the number of actions of the tie switch, and set one intelligent unit as a switch intelligent unit in each switch control area;

[0034] A transfer line determination module is configured to monitor the circuit state of the switch associated with the switch intelligent unit and the switch in the region to which the switch intelligent unit belongs in real time, and when an abnormality of the equipment is monitored, the switch intelligent unit sends abnormality information to the topology intelligent unit of the region; the topology intelligent unit determines the fault location according to the abnormality information and determines the transfer line.

[0035] Further, the application further comprises:

[0036] A monitoring module is configured to monitor the topology change of the topology control area in real time by the topology intelligent unit and the switch intelligent unit in the topology control area during the operation of the power grid.

[0037] A power grid topology information updating module is configured to send topology change information to the topology intelligent unit by the switch intelligent unit when the switch position of the topology control area is changed, and the topology intelligent unit updates the power grid topology information.

[0038] The application also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of the above method.

[0039] The application provides an automatic method and device for distributed feeders, divides a power grid into a plurality of topology control areas with a tie switch as a boundary, sets one area-level control unit, referred to as a topology intelligent unit, in each area to save the topology information of the area; analyzes the topology structure characteristics in each topology control area, divides the area into a plurality of switch control areas, and sets one switch-level control unit, referred to as a switch intelligent unit, in each switch control area; the topology intelligent unit only saves the topology information of the power grid in the range under its jurisdiction, and the switch intelligent unit only saves the operation data of the switch and the power grid around the switch. Since the access of distributed energy has instability, the distributed energy is taken as an independent unit and does not belong to any topology control area. By the method provided in the application, the number of control units can be greatly reduced, the economic benefit is improved, the communication frequency is reduced, and the communication efficiency is improved; and the centralized management of the distributed energy can realize real-time monitoring of the change of the distributed energy, timely adjustment of the network topology, and avoidance of the overload and heavy load problems caused by the access of the distributed energy. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a flowchart of an automatic method for distributed feeders provided by the embodiment of the application;

[0041] Figure 2 is a flowchart of a topology and switch intelligent unit determination process related to the embodiment of the application;

[0042] Figure 3 is a structural schematic diagram of an automatic device for distributed feeders provided by the embodiment of the application. DETAILED DESCRIPTION

[0043] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the application. However, the application can be implemented in many different ways than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the application, so the application is not limited to the specific implementation disclosed below.

[0044] Figure 1 is a flowchart of an automatic method for distributed feeders provided by the embodiment of the application, and the following will be described in combination with Figure 1 The method provided by the embodiment of the application is described in detail.

[0045] In step S101, the power grid is divided into a plurality of topology control areas with a feeder as a minimum unit, and one intelligent unit is set in each topology control area as a topology intelligent unit.

[0046] The method provided by the application divides the distribution network into a plurality of topology control areas, each topology control area t i has a feeder as a minimum unit, ti A set fs consisting of multiple feeders, where fs = {f a ,f b ,......,f k}, a-k are the numbers of topology control areas. Each topology control area t i is configured with one intelligent unit as a topology intelligent unit tU i which saves the topology information in this area. Meanwhile, each t i is configured with multiple intelligent units as switch intelligent units sU ij , one sU ij monitors and controls one or more switches in this area. The topology intelligent unit can communicate with the switch intelligent units sU ij and different topology intelligent units. In addition, the topology intelligent unit undertakes the role of saving and dynamically updating the topology structure of its jurisdiction area t i . Since the topology intelligent unit undertakes the tasks of dynamically updating the topology relationship and inter-area topology communication, in order to balance the load and prevent the tasks of the topology intelligent units from being too busy, causing local resource waste and excessive computing tasks of some topology intelligent units, the topology control area division strategy is as follows:

[0047] (1) Calculate the selection degree of the feeder

[0048] In order to balance the load of each topology intelligent unit, it is hoped that the feeders with greater load pressure or greater risk of failure are evenly distributed in multiple areas, and these lines can be monitored and processed in parallel during peak electricity consumption. Considering the number of devices, the average load of the feeder, the maximum load of the feeder, and the tie strength, the selection degree C of the feeder is calculated,

[0049] The calculation formula of the selection degree C of the feeder is as follows:

[0050]

[0051] Wherein, P represents the tie strength of the feeder, Q represents the load strength of the feeder, Qmax represents the maximum load strength of the feeder, Qmin represents the minimum load strength of the feeder; Pmax represents the maximum tie strength of the feeder, and Pmin represents the minimum tie strength of the feeder.

[0052] The calculation formula of the load strength is as follows, wherein N represents the number of devices on the feeder, A o represents the average load, and M o represents the maximum load.

[0053]

[0054] (2) Determine the area

[0055] The principle for determining the control zones is to balance the topology density and line stability of each zone as much as possible. Therefore, based on the principle of balancing the topology density, tie switch density, and line stability of each topology control zone, the number of tie switches and the number of topology control zones in each zone are determined. The specific formulas for calculating the topology density and tie switch density of each topology control zone are as follows:

[0056]

[0057]

[0058] Where td is the topology density of each topology control region, and sd is the tie switch density; N s C represents the total number of interconnecting switches in the entire area. N D represents the number of currently divided regions; D represents the total number of switches in the entire region, N total E represents the number of points in a certain region. total This indicates the number of edges in the region.

[0059] The specific process is as follows: Figure 2 As shown, the process includes the following:

[0060] a) Unselected feeders are maintained by a set fs, and fsRegion maintains the feeder set for each region. Each region maintains an fsRegion information set. If fs is not empty, the feeder with the highest selection degree in fs is selected. i Create a new fsRegion as the center, and place the feeder i Remove from fs and add to fsRegion.

[0061] b) Create a new fsRegion, select the feeder with the lowest selection degree in fs and add it to the fsRegion, and add the feeder adjacent to this feeder to Neig.

[0062] c) In fsRegion, select the feeder with the highest degree from the set of adjacent feeders Neig. If, after this feeder is added to fsRegion, the topology density td of the sub-network area formed by all feeders and their switches in fsRegion is less than the average topology density of the entire power grid, and the tie switch density sd of this sub-network area is less than the tie switch density of the entire network, add it to fsRegion and remove it from fs, and add its adjacent feeders to Neig. If, after this feeder is added to fsRegion, the topology density td of the sub-network area formed by all feeders and their switches in fsRegion is greater than the average topology density of the entire power grid, or the tie switch density sd of this sub-network area is greater than the tie switch density of the entire network, remove it from Neig.

[0063] d) repeat c) until Neig is 0 or the number of devices in the current fsRegion is greater than the average number of devices that have been partitioned in all regions so far, the current fsRegion is a new sub-region.

[0064] Repeat a) b) c) d) until fs is empty.

[0065] Step S102, according to the number of actions of the contact switch, each topology control region is divided into a plurality of switch control regions, and each switch control region sets an intelligent unit as a switch intelligent unit.

[0066] Taking the monthly average number of actions as a reference basis, for each feeder, starting from the switch with the highest monthly average number of actions, if the average number of actions of the switch is greater than the overall average number of actions, an independent switch intelligent unit is set up for the switch;

[0067] If the average number of actions of the switch is less than the overall average number of actions, the switches in the neighborhood are sequentially added until the average number of actions is greater than or equal to the overall average number of actions, and an independent switch intelligent unit is set up for all switches.

[0068] Step S103, the switch intelligent unit, real-time monitoring of the circuit state of the switch and its associated switches in the region to which it belongs, when monitoring device abnormalities, the switch intelligent unit sends abnormal information to the topology intelligent unit of the region; the topology intelligent unit, according to the abnormal information, judges the fault location, and determines the transfer line.

[0069] For each region t i ,sU ij Real-time monitoring of the circuit state of the switch and its associated switches. When sU ij monitors device abnormal information such as s p left current abnormality, s q lower end current abnormality, actively sends abnormal messages to the topology intelligent unit tU i of the region, tU i receives the message, judges the fault reason.

[0070] tU i After quickly determining the fault location, determine the transfer line. The transfer line has three types, respectively, the connected distributed energy line (such as photovoltaic power generation, etc.) with small load pressure, the load space line in the same region and the line under the jurisdiction of the topology intelligent unit outside the current region;

[0071] By comparing the load capacity LA that can be increased by the line, the topology intelligent unit first connects to the switch intelligent unit sU mn of the distributed power switch, sends a request, when LA>1, sUmn The switch is operated, and the information of the consent request is sent to the topology intelligent unit;

[0072] The line load capacity calculation formula is as follows, M o represents the maximum load of the power supply line of the candidate line o, C o represents the current load of the power supply line to be connected, A o represents the average load. The above data are obtained by the intelligent unit sU ij is saved and updated regularly.

[0073]

[0074] If the distributed energy source cannot be accessed, a first-come-first-served three-way handshake strategy is adopted, and the topology intelligent unit sends a request to the switch intelligent unit sU mn of the adjacent distributed power supply switch, and the switch intelligent unit sU mn that can provide the connection receives the request, queries the LA maintained by it, and replies to the consent request information when the LA>0.5. When the topology intelligent unit receives a response from any switch intelligent unit sU mn , the switch intelligent unit sU mn that sent the switch position change instruction is not replied to.

[0075] During the operation of the power grid, the topology intelligent unit and the switch intelligent unit in the topology control area to which the topology intelligent unit belongs monitor the topology changes of the topology control area in real time. When a change such as switch position change occurs in the topology control area, the switch intelligent unit first detects the matter, and the switch intelligent unit sends topology change information to the topology intelligent unit, and the topology intelligent unit updates the power grid topology information. The topology intelligent unit broadcasts the topology change information to the topology intelligent units of adjacent areas, and the adjacent topology intelligent units return after receiving the information.

[0076] Based on the same inventive concept, the application also provides an automatic device for a distributed feeder, as shown in Figure 3 , comprising:

[0077] The topology intelligent unit setting module 310 is used to divide the power grid into a plurality of topology control areas with the feeder as the minimum unit, and set one intelligent unit as a topology intelligent unit in each topology control area;

[0078] The switch intelligent unit setting module 320 is used to divide each topology control area into a plurality of switch control areas according to the number of actions of the tie switch, and set one intelligent unit as a switch intelligent unit in each switch control area;

[0079] The switch intelligent unit further comprises a transfer line determination module 330, which is configured to monitor, in real time, a circuit state of a switch associated with the switch intelligent unit and at both ends of the switch in a region to which the switch intelligent unit belongs, and send, when an abnormality of a device is monitored, abnormality information to a topology intelligent unit of the region; and the topology intelligent unit is configured to determine a fault position and determine a transfer line according to the abnormality information.

[0080] Further, the topology intelligent unit further comprises:

[0081] The topology intelligent unit saves power grid topology information of a region to which the topology intelligent unit belongs.

[0082] Further, the topology intelligent unit further comprises:

[0083] The switch intelligent unit saves power grid operation data of a switch monitored by the switch intelligent unit and a switch control region to which the switch belongs.

[0084] Further, the topology intelligent unit further comprises a setting module, which is configured to:

[0085] The selection degree calculation submodule is configured to calculate a selection degree C of a feeder, and distribute the feeder in a plurality of topology control regions according to the selection degree C, and a calculation formula of the selection degree C of the feeder is specifically as follows:

[0086]

[0087] wherein P represents a tie-in strength of the feeder, Q represents a load strength of the feeder, Qmax represents a maximum load strength of the feeder, Qmin represents a minimum load strength of the feeder, Pmax represents a maximum tie-in strength of the feeder, and Pmin represents a minimum tie-in strength of the feeder.

[0088] The tie-in switch number and topology control region number determination submodule is configured to determine a tie-in switch number and a division and a topology control region number of each topology control region according to a topology density, a tie-in switch density and a line stability balance principle of each topology control region, and a calculation formula of the topology density and the tie-in switch density of each topology control region is specifically as follows:

[0089]

[0090]

[0091] wherein td represents the topology density of each topology control region, sd represents the tie-in switch density, N represents a number of tie-in switches in a region, C represents a selection degree of a feeder in the region, D represents a number of switches in the region, and N represents a number of points in the region. s N represents a number of tie-in switches in a region, C represents a selection degree of a feeder in the region, D represents a number of switches in the region, and N represents a number of points in the region. N N represents a number of tie-in switches in a region, C represents a selection degree of a feeder in the region, D represents a number of switches in the region, and N represents a number of points in the region. total N represents a number of tie-in switches in a region, C represents a selection degree of a feeder in the region, D represents a number of switches in the region, and N represents a number of points in the region. total N represents a number of tie-in switches in a region, C represents a selection degree of a feeder in the region, D represents a number of switches in the region, and N represents a number of points in the region.

[0092] Further, the switch intelligent unit setting module comprises:

[0093] The first switch intelligent unit setting submodule takes the monthly average operation times as a reference basis, and starts judging from the switch with the highest monthly average operation times for each feeder. If the average operation times of the switch are greater than the overall average operation times, an independent switch intelligent unit is set for the switch.

[0094] The second switch intelligent unit setting submodule adds the switches in the neighborhood in sequence until the average operation times are greater than or equal to the overall average operation times, and then an independent switch intelligent unit is set for all the switches.

[0095] Further, the method further comprises:

[0096] The monitoring module is configured to monitor the topology change of the topology control area in real time by the topology intelligent unit and the switch intelligent units in the topology control area during the operation of the power grid.

[0097] The power grid topology information updating module is configured to send the topology change information to the topology intelligent unit by the switch intelligent unit when the switch position of the topology control area changes, and update the power grid topology information by the topology intelligent unit.

[0098] Further, the transfer line determination module comprises:

[0099] The line division submodule is configured to divide the transfer line into three types, i.e., a connected distributed energy line with small load pressure, a load space line in the same region, and a line under the jurisdiction of the topology intelligent unit in the current region.

[0100] The switch position submodule is configured to send a switch position request to the switch intelligent unit of the adjacent distributed power switch by the topology intelligent unit if the topology intelligent unit cannot access the distributed energy. mn Send a request, and the switch intelligent unit sU mn After receiving the request, query the maintained LA. When LA>0.5, reply to the agreement request information. When the topology intelligent unit receives any one of the switch intelligent units sU mn Response, then send the switch position instruction to the switch intelligent unit sU mn The other responses are not replied.

[0101] The application provides an automatic method and device for distributed feeders, which can model existing station diagrams and feeder diagrams, simulate devices such as switches as points, and connections between switches as lines to obtain a topological structure of a power grid, obtain an intelligent unit configuration scheme by using the method, and compare with a control group in which an intelligent unit is added to each switch, distributed energy is randomly added, and 100 groups of faults are randomly set in batches for simulation calculation. Experimental results show that the accuracy is not less than that of the control group, and the communication overhead and hardware overhead are less than those of the control group.

[0102] The application provides an automatic method and device for distributed feeders, which divides a power grid into a plurality of topological control regions by taking tie switches as boundaries, sets a regional control unit called a topological intelligent unit in each region to save topological information of the region, analyzes topological structure characteristics in each topological control region to divide the region into a plurality of switch control regions, sets a switch control unit called a switch intelligent unit in each switch control region, and saves only power grid topological information in a range under jurisdiction of the topological intelligent unit and only power grid operation data of a monitored switch and a periphery of the switch by the switch intelligent unit. Since the access of distributed energy has instability, the distributed energy is taken as an independent unit and does not belong to any topological control region. The method provided by the application can greatly reduce the number of control units, improve economic benefits, reduce communication times, and improve communication efficiency. Centralized management of the distributed energy can realize real-time monitoring of changes of the distributed energy, timely adjustment of a network topology, and avoidance of overload and heavy load problems caused by the access of the distributed energy.

[0103] Those skilled in the art should understand that the embodiments of the application can be provided as a method, a system, or a computer program product. Therefore, the application can adopt a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the application can adopt a form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program codes. The solutions in the embodiments of the application can be implemented in various computer languages, for example, an object-oriented programming language Java and an interpreted scripting language JavaScript.

[0104] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flow or blocks Figure 1 one or more flow or blocks

[0105] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks. Figure 1 one or more flow or blocks Figure 1 one or more flow or blocks

[0106] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flow or blocks Figure 1 one or more flow or blocks

[0107] Although preferred embodiments of the application have been described, those skilled in the art will recognize that additional modifications and variations can be made thereto without departing from the spirit and scope of the application.

[0108] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. An automated method for distribution feeders, characterized by, The power grid is divided into a plurality of topology control areas with a feeder as a minimum unit, and one intelligent unit is set as a topology intelligent unit in each topology control area. Each topology control area is divided into a plurality of switch control areas according to the number of actions of the tie-in switch, and one intelligent unit is set as a switch intelligent unit in each switch control area. The switch intelligent unit monitors the circuit state of the switch associated with the switch intelligent unit in the region to which the switch intelligent unit belongs in real time, and sends abnormal information to the topology intelligent unit of the region when an abnormality of the device is monitored. The topology intelligent unit determines the fault location and determines the transfer line according to the abnormal information. The power grid is divided into a plurality of topology control areas with a feeder as a minimum unit, including: The selectivity C of the feeder is calculated, and the feeders are evenly distributed in the plurality of topology control areas according to the selectivity C, and the calculation formula of the selectivity C of the feeder is specifically: Wherein, P represents the tie-in strength of the feeder, Q represents the load strength of the feeder, Qmax represents the maximum load strength of the feeder, Qmin represents the minimum load strength of the feeder, Pmax represents the maximum tie-in strength of the feeder, and Pmin represents the minimum tie-in strength of the feeder. The number of tie-in switches and the number of divided topology control areas of each topology control area are determined according to the topology density, tie-in switch density and line stability balance principle of each topology control area, and the calculation formula of the topology density and tie-in switch density of each topology control area is specifically: Further comprising: Wherein, td is the topology density of each topology control area, sd is the liaison switch density; N s represents the number of liaison switches in the entire area, C N represents the number of the current divided areas; D represents the number of switches in the entire area, N total represents the number of points in a certain area, E total represents the number of edges of the area.

2. The method of claim 1, wherein, The topology intelligent unit saves the power grid topology information of the region to which the topology intelligent unit belongs. Further comprising:

3. The method of claim 1, wherein, The switch intelligent unit saves the power grid operation data of the monitored switch and the switch control area to which the switch intelligent unit belongs. Each topology control area is divided into a plurality of switch control areas according to the number of actions of the tie-in switch, including:

4. The method of claim 1, wherein, Taking the monthly average action number as a reference, for each feeder, starting from the switch with the highest monthly average action number, if the average action number of the switch is greater than the overall average action number, an independent switch intelligent unit is set up for the switch; If the average action number of the switch is less than the overall average action number, the switches in the neighborhood are sequentially added until the average action number is greater than or equal to the overall average action number, and an independent switch intelligent unit is set up for all the switches. Further comprising:

5. The method of claim 1, wherein, During the operation of the power grid, the topology intelligent unit and the switch intelligent unit in the topology control area to which the topology intelligent unit belongs monitor the topology change of the topology control area in real time; When the switch position of the topology control area changes, the switch intelligent unit sends topology change information to the topology intelligent unit, and the topology intelligent unit updates the power grid topology information. The topology intelligent unit determines the fault location and determines the transfer line according to the abnormal information, including:

6. The method of claim 1, wherein, The transfer line has three types, which are a connected distributed energy line with small load pressure, a load space line in the same area, and a line under the jurisdiction of a topology intelligent unit outside the current area. The topology intelligent unit sets a module for dividing the power grid into a plurality of topology control areas with a feeder as a minimum unit, and one intelligent unit is set as a topology intelligent unit in each topology control area. By comparing the line loadability LA, the topology intelligence unit is first connected to the switch intelligence unit sU of the distributed power switch mn Send request, when LA>1, sU mn Control the switch, and send the information of the consent request to the topology intelligence unit; If the distributed energy cannot be accessed, the topology intelligent unit sends a switch intelligent unit sU of the adjacent distributed power switch mn Send request, switch intelligent unit sU that can provide connection mn After receiving the request, query the LA it maintains, when LA>0.5, reply to agree to request information, when the topology intelligent unit receives any one switch intelligent unit sU mn Response, then to the switch intelligent unit sU mn Send switch displacement instruction, other responses are not replied.

7. An automation device for a distribution feeder, characterized by, ​ ​ The switch intelligent unit setting module is configured to divide each topology control area into a plurality of switch control areas according to the number of actions of the tie switch, and set one intelligent unit in each switch control area as a switch intelligent unit; The transfer line determination module is configured to monitor the circuit state of the switch associated with the switch intelligent unit and the switch in the area to which the switch intelligent unit belongs in real time, and send abnormal information to the topology intelligent unit of the area when an abnormality of the equipment is monitored. The topology intelligent unit is configured to determine the fault location and determine the transfer line according to the abnormal information. The power grid is divided into a plurality of topology control areas with a feeder as a minimum unit, including: The selectivity C of the feeder is calculated, and the feeders are evenly distributed in the plurality of topology control areas according to the selectivity C. The calculation formula of the selectivity C of the feeder is specifically: Wherein, P represents the tie strength of the feeder, Q represents the load strength of the feeder, Qmax represents the maximum load strength of the feeder, Qmin represents the minimum load strength of the feeder, Pmax represents the maximum tie strength of the feeder, and Pmin represents the minimum tie strength of the feeder. The number of tie switches of each topology control area and the number of divided topology control areas are determined according to the topology density, tie switch density and line stability balance principle of each topology control area. The calculation formula of the topology density and the tie switch density of each topology control area is specifically: Wherein, td is the topology density of each topology control area, sd is the liaison switch density; N s represents the number of liaison switches in the entire area, C N represents the number of the current divided areas; D represents the number of switches in the entire area, N total represents the number of points in a certain area, E total represents the number of edges of the area.

8. The apparatus of claim 7, wherein, Further comprising: The monitoring module is configured to monitor the topology change of the topology control area in real time by the topology intelligent unit and the switch intelligent unit in the topology control area during the operation of the power grid. The power grid topology information updating module is configured to send the topology change information to the topology intelligent unit by the switch intelligent unit when the switch in the topology control area is changed, and update the power grid topology information by the topology intelligent unit.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the steps of the method in any one of claims 1 to 6.

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