CN118523269B - Self-healing method and system for double-ring network type power distribution network under communication abnormal scene - Google Patents

Abstract

The present invention discloses a self-healing method and system for a dual-ring network distribution network in a communication abnormality scenario. The dual-ring network distribution network includes multiple switch stations, each bus section of the switch station is respectively configured with a bus terminal, and the bus terminals in the same ring network are connected hand in hand by optical fiber; when a communication abnormality occurs between the switch stations of the dual-ring network distribution network, the method includes: judging the fault location corresponding to the communication abnormality by current detection; matching a preset fault self-healing rule according to the fault location; controlling the corresponding switch to open and close according to the preset fault self-healing rule to isolate the fault location and restore power supply to the non-fault area. The present invention will not exit the self-healing function when an optical fiber communication abnormality occurs in the distribution network. When a fault occurs, fault isolation can be achieved by undervoltage tripping, and then the power supply to the non-fault area can be restored by self-healing, which can effectively improve the power supply reliability of the distribution network and the fault-tolerant processing of fault coordination.

Description

A dual-ring network distribution network self-healing method and system under abnormal communication scenarios

Technical Field

The present invention relates to the field of electric power technology, and in particular to a dual-ring network type distribution network self-healing method and system under abnormal communication scenarios.

Background Art

With the rapid development of social economy and the widespread application of digital technology in distribution stations, power supply stability and power quality optimization have become increasingly critical issues. Frequent power outages and abnormal power quality not only lead to huge economic losses, but also seriously affect the convenience of public life, prompting users to demand continuous and high-quality power supply services to an unprecedented level.

At present, the fault self-healing of distribution networks usually adopts the intelligent distributed feeder automation mode. In the self-healing process, it can meet the open-loop power transfer self-healing by obtaining multi-source information and internal algorithms. However, it has poor performance in dealing with communication anomalies, especially the direct discharge of self-healing after communication anomalies, and the internal setting is complex, making operation and maintenance difficult. Therefore, how to quickly and accurately locate the fault point in the communication anomaly scenario, efficiently isolate the fault area, and promptly restore power supply to the non-fault area has become an urgent problem to be solved.

Summary of the invention

The purpose of the present invention is to improve the fault tolerance of distribution network fault coordination. In order to achieve the above purpose, the present invention provides a dual-ring network distribution network self-healing method and system in a communication abnormality scenario.

In a first aspect, an embodiment of the present invention provides a self-healing method for a dual-ring distribution network in a communication abnormality scenario, wherein the dual-ring distribution network includes a plurality of switch stations, each bus section of the switch station is respectively configured with a bus terminal, and the bus terminals in the same ring network are connected hand in hand through optical fibers;

When communication abnormality occurs between the switch stations of the double-ring network distribution network, the method comprises:

Determine the fault location corresponding to the communication anomaly by current detection, wherein the fault location includes a feeder, a busbar and a trunk line;

Matching a preset fault self-healing rule according to the fault location;

The corresponding switch is controlled to be opened and closed according to the preset fault self-healing rule to isolate the fault location and restore power supply to the non-fault area.

Preferably, the bus terminals in the same ring network are connected hand in hand via optical fibers, including:

The encrypted status information is transmitted between the bus terminals in the same ring network through optical fiber, and the encrypted status information at least includes switch position, bus voltage and line current status.

Preferably, before communication abnormality occurs between the switch stations of the double-ring network type distribution network, the method includes:

The communication status between the corresponding switch stations is determined according to the information transmission status between the adjacent bus terminals.

Preferably, judging the communication status between the corresponding switch stations according to the information transmission status between the adjacent bus terminals includes:

If the bus terminal fails to receive the transmission information of the bus terminal on the opposite side continuously for a preset number of frames, it is determined that there is a communication abnormality between the corresponding switch stations.

Preferably, before judging the communication status between the corresponding switch stations according to the information transmission status between the adjacent bus terminals, the method further comprises:

Generate multiple topology configuration files according to the number and connection relationship of the switch stations of the double-ring network type distribution network, wherein the topology configuration files are used to reflect the main supply circuit topology relationship of the target distribution area, and at least include the main supply circuit breaker number, line segment number, bus number and switch station number;

The topology configuration file is imported into each of the bus terminals so that all the bus terminals in the same ring network adopt the same topology configuration file, and the bus terminal number is set according to the switch station number corresponding to the bus terminal.

Preferably, the determining the fault location corresponding to the communication abnormality by current detection includes:

Real-time current detection is performed through the bus terminal corresponding to the communication anomaly, and the corresponding fault location is determined according to the detection result.

Preferably, performing real-time current detection through the bus terminal corresponding to the communication abnormality and determining the corresponding fault location according to the detection result includes:

Performing real-time overcurrent detection on the corresponding feeder interval through the bus terminal, and if the detected current is greater than the first set value, determining that the feeder interval has a fault;

Performing real-time differential current discrimination on the corresponding bus through the bus terminal, and if the differential current is detected to be greater than the second set value, determining that the bus has a fault;

The corresponding trunk line switch is subjected to real-time differential current discrimination through the bus terminal. If the differential current is detected to be greater than a third set value, it is determined that a fault has occurred in the trunk line.

Preferably, the preset fault self-healing rules include:

If it is determined that the fault location is a feeder, the bus terminal outputs a trip contact signal to control the corresponding switch to open the circuit breaker to isolate the fault location;

If it is determined that the fault location is the busbar, the overcurrent direction protection and the undervoltage trip control corresponding switches are switched on to isolate the fault location, and when the busbar terminal is not discharged, the corresponding switches are controlled to close to restore power supply to the non-fault area, wherein the current direction of the overcurrent direction protection points to the busbar, and the overcurrent direction protection does not operate;

If it is determined that the fault location is the main line, the line differential protection is exited and the overcurrent directional protection and undervoltage trip control corresponding switches are opened to isolate the fault location, and when the bus terminal is not discharged, the corresponding switches are controlled to close to restore power supply to the non-fault area, wherein the current direction of the overcurrent directional protection points to the line.

Preferably, after if it is determined that the fault location is a feeder, the bus terminal outputs a trip contact signal to control the corresponding switch to open the switch to isolate the fault location, the method further includes:

If a distributed power generation disconnection signal is detected and the feeder interval is a distributed power generation interval, the bus terminal outputs a trip contact signal to control the corresponding switch to open the gate to disconnect the distributed power generation.

In a second aspect, an embodiment of the present invention provides a dual-ring network type distribution network self-healing system in a communication abnormality scenario, which is applicable to the distribution network self-healing method as described above, including:

A fault location module, used to determine the fault location corresponding to the communication anomaly through current detection, wherein the fault location includes a feeder, a busbar and a trunk line;

A fault self-healing rule matching module, used for matching a preset fault self-healing rule according to the fault location;

The fault isolation and power supply recovery module is used to control the corresponding switch to open and close according to the preset fault self-healing rules, so as to isolate the fault location and restore power supply to the non-fault area.

Compared with the prior art, the dual-ring distribution network self-healing method and system in a communication abnormality scenario in an embodiment of the present invention has the following beneficial effects: based on the mutual cooperation of centralized bus terminals, the self-healing function will not be exited when an optical fiber communication abnormality occurs in the distribution network. When a fault occurs, the fault isolation can be achieved through undervoltage tripping. After the fault isolation is completed, the power supply to the non-fault area is restored through the self-healing switch, which can effectively deal with occasional optical fiber communication abnormalities on site and improve the power supply reliability and fault-tolerant processing of fault coordination of the distribution network.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic flow chart of a dual-ring network type distribution network self-healing method in a communication abnormality scenario according to an embodiment of the present invention;

2 is a network structure fault diagram of a double-ring network distribution network according to an embodiment of the present invention;

FIG3 is a schematic diagram of a process of fault location according to an embodiment of the present invention;

4 is a schematic diagram of the structure of a dual-ring network type distribution network self-healing system in a communication abnormality scenario according to an embodiment of the present invention;

In Figure 2, S1~S4 are substations; 101 is the outgoing line switch of substation S1; 102 is the incoming and outgoing line switch connecting switch station A to substation S1; 103 is the incoming and outgoing line switch connecting switch station A to switch station B; 104 is the incoming and outgoing line switch connecting switch station B to switch station A; 105 is the incoming and outgoing line switch connecting switch station B to switch station C; F1 is the main line fault point between switch station A and switch station B.

DETAILED DESCRIPTION

The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

As shown in FIG1 , an embodiment of the present invention provides a dual-ring type distribution network self-healing method in a communication abnormality scenario.

The double-ring distribution network includes multiple switch stations. Each bus section of the switch station is equipped with a bus terminal. The bus terminals in the same ring network are connected hand in hand through optical fibers.

Furthermore, the dual-ring network distribution network also includes multiple distribution stations, which are connected hand in hand through optical fibers. Specifically, the distribution stations interact with each other in real time based on SMV messages for analog information. In this embodiment, 4,000 points of data can be transmitted in 1 second. The standard frequency of voltage and current is 50 Hz, corresponding to each cycle of 20 ms, including 80 points of data. SMV messages can achieve high-speed data transmission, and at the same time have a redundancy mechanism, which can prevent frame loss or data anomalies during output transmission, ensure the rapidity and accuracy of differential protection action, and can instantly share the status information of related devices in the distribution network self-healing system. Furthermore, based on the SMV message, a proprietary message encryption format is used for data transmission. SMV message data is only transmitted on both sides of the line differential, which is used to calculate the differential current and process the differential protection logic.

During the SMV data transmission process, all status information in the distribution network self-healing system is also synchronously transmitted using optical fiber. Specifically, the bus terminals in the same ring network are connected hand in hand through optical fiber, including: the encrypted status information is transmitted through optical fiber between the bus terminals in the same ring network, and the encrypted status information includes at least the switch position, bus voltage and line current status. Unlike SMV data, the encrypted status information will be transmitted in the entire distribution network self-healing system. The transmission method is that the bus terminal receives the encrypted status information of the adjacent bus terminal, and then packages the encrypted status information of itself and the adjacent bus terminal and sends it to the two adjacent bus terminals (if it is the head and tail terminal, there is only one adjacent terminal). Through this state information transmission of adjacent terminals, the state information data transmission and real-time sharing in this self-healing system can be realized. Through high-speed data interaction, the terminal can understand the switch position, bus voltage and line current status of the self-healing system in real time, so as to process the self-healing related logic.

It should be noted that the double-ring network distribution network is composed of 3 to 16 switch stations. As shown in Figure 2, the network structure fault diagram of the double-ring network distribution network of this embodiment includes four switch stations, namely switch station A, switch station B, switch station C and switch station D. Each bus section of each switch station is respectively equipped with a bus terminal for self-healing and processing of wireless terminal equipment related functions, and the distribution stations are connected hand in hand through optical fibers. In this embodiment, when a communication anomaly occurs between switch station A and switch station B, switch station A and switch stations B, C, and D are respectively formed into a communication single ring network for fault processing.

When communication abnormality occurs between switch stations of the double-ring network distribution network, the method comprises the steps of:

S1. Determine the fault location corresponding to the communication abnormality through current detection;

Specifically, real-time current detection is performed through the bus terminal corresponding to the communication anomaly, and the corresponding fault location is determined according to the detection result. The fault location includes the feeder, bus and trunk line.

Further, as shown in FIG3 , step S1 includes:

S101, performing real-time overcurrent determination on the corresponding feeder bay through the bus terminal, and if the detected current is greater than the first set value, determining that a feeder bay fault occurs;

Specifically, in this embodiment, when an optical fiber communication anomaly occurs between the bus terminals of switch station A and B, the self-healing logic does not exit. The bus terminal performs overcurrent determination of the feeder interval in real time, and if the current detected is greater than the first set value, it is determined that the feeder interval is faulty.

S102, performing real-time differential current discrimination on the corresponding bus through the bus terminal, and if the differential current detected is greater than the second set value, it is determined that the bus is faulty;

Specifically, in this embodiment, when an optical fiber communication anomaly occurs between the bus terminals A and B of the switch station, the self-healing logic does not exit. The bus terminal performs real-time bus differential current discrimination, and if the bus differential current is detected to be greater than the second set value, it is determined that the bus has a fault.

S103, performing real-time differential current discrimination on the corresponding trunk line switch through the bus terminal, and if the differential current detected is greater than the third set value, it is determined that a fault occurs in the trunk line.

Specifically, in this embodiment, when an optical fiber communication abnormality occurs between the bus terminals of the switch station A and B, the self-healing logic does not exit. The bus terminal performs a real-time differential current discrimination on the trunk switch 103 and the trunk switch 104. If the differential current is detected to be greater than the third set value, it is determined that a fault has occurred in the trunk line.

S2. Matching preset fault self-healing rules according to the fault location;

Preset fault self-healing rules, including:

1) If the fault location is determined to be the feeder, the bus terminal outputs a trip contact signal to control the corresponding switch to open the gate to isolate the fault location;

Furthermore, after isolating the fault location, the method further includes:

If a distributed power generation disconnection signal is detected and the feeder interval is a distributed power generation interval, the bus terminal outputs a trip contact signal to control the corresponding switch to open the gate to disconnect the distributed power generation.

2) If the fault location is determined to be the busbar, the overcurrent directional protection and undervoltage trip control corresponding switches are switched on to isolate the fault location, and when the busbar terminal is not discharged, the corresponding switches are controlled to close to restore power supply to the non-fault area. The current direction of the overcurrent directional protection points to the busbar, and the overcurrent directional protection does not operate;

3) If the fault location is determined to be the main line, the line differential protection is exited and the overcurrent directional protection and undervoltage trip control corresponding switches are opened to isolate the fault location. When the bus terminal is not discharged, the corresponding switches are controlled to close to restore power supply to the non-fault area. The current direction of the overcurrent directional protection points to the line.

S3. Control the corresponding switches to open and close according to the preset fault self-healing rules to isolate the fault location and restore power supply to the non-fault area.

According to rule 1), the feeder fault handling and self-healing logic operation under abnormal communication are implemented. Specifically, in the case of abnormal optical fiber communication between the bus terminals A and B in the switch station, the self-healing logic does not exit in this embodiment. If it is determined that a feeder fault occurs, the corresponding switch is controlled to open the gate by the bus terminal output trip contact signal to achieve fault isolation; if a distributed power supply joint cutting signal sent by the bus terminal is detected and the feeder interval is a distributed power supply interval, the corresponding switch is controlled to open the gate by the bus terminal output trip contact signal to achieve distributed power supply removal.

According to rule 2), bus fault handling and self-healing logic operation under abnormal communication are implemented. Specifically, in the present embodiment, when an abnormal optical fiber communication occurs between bus terminals A and B in switch station, the self-healing logic does not exit. After the abnormal optical fiber communication occurs, the overcurrent direction protection and undervoltage tripping control corresponding switches are automatically put into operation to disconnect the switches to achieve fault isolation, and when the bus terminal is not discharged, the corresponding switches are controlled to close the switches to restore power supply to the non-fault area.

In a specific embodiment, when an optical fiber communication anomaly occurs between the bus terminals of switch stations A and B, switch station A and switch stations B, C, and D respectively form a communication single ring network, and the self-healing logic does not exit. When a bus fault occurs in switch station A, the communication between the bus terminal of switch station A and the bus terminal at the open-loop point is abnormal. After the bus terminal of switch station A completes the fault isolation, the optical fiber communication of the switch 104 of the bus terminal of switch station B is abnormal and loses pressure, and it trips after a delay time, completing the fault isolation on the open-loop point side. After confirming that the fault is isolated and the self-healing has not discharged, the switch at the open-loop point 105 self-heals and restores power supply to the non-fault area.

In another specific embodiment, when an optical fiber communication anomaly occurs between the bus terminals of switch stations A and B, switch station A and switch stations B, C, and D respectively form a communication single ring network, and the self-healing logic does not exit. When a bus fault occurs in switch station D, the communication between the bus terminal of switch station D and the bus terminal at the open loop point is abnormal. After the bus terminal of switch station D completes the fault isolation, the bus terminal at the open loop point receives the fault isolation signal normally. After confirming that the fault isolation is completed and the self-healing is not discharged, the open loop point 105 switch self-heals and restores power supply to the non-fault area.

According to rule 3), the main line fault handling and self-healing logic operation under abnormal communication are implemented. Specifically, in this embodiment, when an abnormal optical fiber communication occurs between the bus terminals of switch stations A and B, switch station A and switch stations B, C, and D respectively form a single communication ring network, and the self-healing logic does not exit. A fault occurs at point F1 of the main line between switch station A and switch station B. When the optical fiber communication is abnormal, the line differential protection between the main line switch 103 at the bus terminal of switch station A and the main line switch 104 at the bus terminal of switch station B exits, and the overcurrent direction protection and undervoltage tripping are automatically put into operation. The main line switch 103 at the bus terminal of switch station A is subjected to real-time overcurrent direction logic judgment. If it is detected that the current is greater than the set value and the current direction points to the line, the main line switch 103 is controlled to be tripped through the bus terminal output trip contact signal to achieve power supply side fault isolation. Furthermore, after the bus terminal trunk switch 103 of switch station A tripped, the optical fiber communication of the bus terminal trunk switch 104 of switch station B was abnormal and lost pressure, and tripped after a delay time, completing the fault isolation on the open-loop point side. In the communication single-loop network of switch stations B, C, and D, after the bus terminal open-loop point of switch station C received the bus terminal fault isolation signal of switch station B, it automatically healed and restored the power supply of switch stations B and switch stations C.

It should be noted that before communication abnormality occurs between switch stations of the double-ring network distribution network, including:

According to the information transmission between adjacent bus terminals, the communication status between the corresponding switch stations is judged. Specifically, the optical fiber connecting each bus terminal can realize the hand-in-hand optical fiber communication of the bus terminals in the same ring network. Connect the optical port of the first terminal to the optical port of the next terminal in the order, and continue to connect to the optical port of the last terminal. The optical port power and channel information in the bus terminal can check the integrity and communication quality of the optical fiber connection to ensure that there is no physical damage or signal attenuation during normal operation. If the bus terminal fails to receive the transmission information of the opposite bus terminal for a preset number of frames in a row, it is judged that there is a communication anomaly between the corresponding switch stations. In this embodiment, if the bus terminal fails to receive the information transmitted by the opposite bus terminal through the optical fiber for three consecutive frames, it is judged that the optical fiber communication between the corresponding switch stations is abnormal.

Furthermore, before judging the communication status between corresponding switch stations according to the information transmission status between adjacent bus terminals, the method includes:

Step 1: Generate multiple topology configuration files according to the number and connection relationship of the switch stations of the double-ring distribution network;

Specifically, the topology configuration file is used to reflect the main supply circuit topology relationship of the target distribution area, which at least includes the main supply circuit breaker number, line segment number, bus number and switch station number. The number or identification of the same primary device in the topology configuration file remains consistent.

Step 2: Import the topology configuration file into each bus terminal so that all bus terminals in the same ring network use the same topology configuration file, and set the bus terminal number according to the switch station number corresponding to the bus terminal.

Specifically, all bus terminals in the same ring network use the same topology configuration file. If the topology configuration files of the local bus terminal are different from those of the adjacent bus terminal, a topology configuration file verification error alarm will be issued during the verification.

An embodiment of the present invention provides a dual-ring network distribution network self-healing method under a communication abnormality scenario. Based on the mutual cooperation of centralized bus terminals, the self-healing function will not be exited when an optical fiber communication abnormality occurs in the distribution network. When a fault occurs, fault isolation can be achieved through undervoltage tripping. After completing the fault isolation, power supply to non-fault areas is restored through the self-healing switch. This method can effectively deal with occasional optical fiber communication abnormalities on site and improve the power supply reliability and fault-tolerant processing of fault coordination of the distribution network.

As shown in FIG4 , an embodiment of the present invention provides a dual-ring network type distribution network self-healing system in a communication abnormality scenario, which is applicable to the distribution network self-healing method as described above, and includes:

Fault location module 1, used to determine the fault location corresponding to the communication abnormality through current detection, the fault location includes feeder, busbar and trunk line;

A fault self-healing rule matching module 2 is used to match a preset fault self-healing rule according to the fault location;

The fault isolation and power supply restoration module 3 is used to control the corresponding switch to open and close according to the preset fault self-healing rules, so as to isolate the fault location and restore power supply to the non-fault area.

It should be noted that each module in the dual-ring distribution network self-healing system under the above-mentioned communication abnormality scenario can be fully or partially implemented by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules. For the specific definition of the dual-ring distribution network self-healing system under a communication abnormality scenario, please refer to the definition of the dual-ring distribution network self-healing method under a communication abnormality scenario above. The two have the same functions and effects, which will not be repeated here.

To sum up, the embodiment of the present invention is a dual-ring network distribution network self-healing method and system under the communication abnormality scenario. Based on the mutual cooperation of centralized bus terminals, the self-healing function will not be exited when the optical fiber communication abnormality occurs in the distribution network. When a fault occurs, the fault isolation can be achieved through the undervoltage tripping. After the fault isolation is completed, the power supply to the non-fault area is restored through the self-healing switch. It can effectively deal with occasional optical fiber communication abnormalities on site and improve the power supply reliability of the distribution network and the fault-tolerant processing of fault coordination.

Each embodiment in this specification is described in a progressive manner, and the same or similar parts of each embodiment can be directly referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. It should be noted that the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims (8)

1. A self-healing method for a double-ring distribution network under abnormal communication scenarios, characterized in that the double-ring distribution network includes a plurality of switch stations, each bus section of the switch station is respectively configured with a bus terminal, and the bus terminals in the same ring network are connected hand in hand through optical fibers; When communication abnormality occurs between the switch stations of the double-ring network distribution network, the method comprises: Determine the fault location corresponding to the communication anomaly by current detection, wherein the fault location includes a feeder, a busbar and a trunk line; Matching a preset fault self-healing rule according to the fault location; Controlling the corresponding switch to open and close according to the preset fault self-healing rule to isolate the fault location and restore power supply to the non-fault area; The determining the fault location corresponding to the communication abnormality through current detection includes: Performing real-time current detection through the bus terminal corresponding to the communication anomaly, and determining the corresponding fault location according to the detection result; The preset fault self-healing rules include: If it is determined that the fault location is a feeder, the bus terminal outputs a trip contact signal to control the corresponding switch to open the circuit breaker to isolate the fault location; If it is determined that the fault location is the busbar, the overcurrent direction protection and the undervoltage trip control corresponding switches are switched on to isolate the fault location, and when the busbar terminal is not discharged, the corresponding switches are controlled to close to restore power supply to the non-fault area, wherein the current direction of the overcurrent direction protection points to the busbar, and the overcurrent direction protection does not operate; If it is determined that the fault location is the main line, the line differential protection is exited and the overcurrent directional protection and undervoltage trip control corresponding switches are opened to isolate the fault location, and when the bus terminal is not discharged, the corresponding switches are controlled to close to restore power supply to the non-fault area, wherein the current direction of the overcurrent directional protection points to the line. 2. The distribution network self-healing method according to claim 1, characterized in that the bus terminals in the same ring network are connected hand in hand through optical fibers, comprising: The encrypted status information is transmitted between the bus terminals in the same ring network through optical fiber, and the encrypted status information at least includes switch position, bus voltage and line current status. 3. The distribution network self-healing method according to claim 1, characterized in that before communication abnormality occurs between the switch stations of the double-ring network distribution network, it comprises: The communication status between the corresponding switch stations is determined according to the information transmission status between the adjacent bus terminals. 4. The distribution network self-healing method according to claim 3, characterized in that the determining the communication status between the corresponding switch stations according to the information transmission status between the adjacent bus terminals comprises: If the bus terminal fails to receive the transmission information of the bus terminal on the opposite side continuously for a preset number of frames, it is determined that there is a communication abnormality between the corresponding switch stations. 5. The distribution network self-healing method according to claim 3, characterized in that before judging the communication status between the corresponding switch stations according to the information transmission status between the adjacent bus terminals, it includes: Generate multiple topology configuration files according to the number and connection relationship of the switch stations of the double-ring network type distribution network, wherein the topology configuration files are used to reflect the main supply circuit topology relationship of the target distribution area, and at least include the main supply circuit breaker number, line segment number, bus number and switch station number; The topology configuration file is imported into each of the bus terminals so that all the bus terminals in the same ring network adopt the same topology configuration file, and the bus terminal number is set according to the switch station number corresponding to the bus terminal. 6. The distribution network self-healing method according to claim 1, characterized in that the real-time current detection is performed through the bus terminal corresponding to the communication abnormality, and the corresponding fault location is determined according to the detection result, comprising: Performing real-time overcurrent detection on the corresponding feeder interval through the bus terminal, and if the detected current is greater than the first set value, determining that the feeder interval has a fault; Performing real-time differential current discrimination on the corresponding bus through the bus terminal, and if the differential current is detected to be greater than the second set value, determining that the bus has a fault; The corresponding trunk line switch is subjected to real-time differential current discrimination through the bus terminal. If the differential current is detected to be greater than a third set value, it is determined that a fault has occurred in the trunk line. 7. The distribution network self-healing method according to claim 1, characterized in that after if it is determined that the fault location is a feeder, the bus terminal outputs a trip contact signal to control the corresponding switch to open the gate to isolate the fault location, it also includes: If a distributed power generation disconnection signal is detected and the feeder interval is a distributed power generation interval, the bus terminal outputs a trip contact signal to control the corresponding switch to open the gate to disconnect the distributed power generation. 8. A dual-ring network type distribution network self-healing system in a communication abnormality scenario, applicable to the distribution network self-healing method according to any one of claims 1 to 7, characterized in that it comprises: A fault location module, used to determine the fault location corresponding to the communication anomaly through current detection, wherein the fault location includes a feeder, a busbar and a trunk line; A fault self-healing rule matching module, used for matching a preset fault self-healing rule according to the fault location; A fault isolation and power supply recovery module, used to control the corresponding switch to open and close according to the preset fault self-healing rule, so as to isolate the fault location and restore power supply to the non-fault area; The determining the fault location corresponding to the communication abnormality through current detection includes: Performing real-time current detection through the bus terminal corresponding to the communication anomaly, and determining the corresponding fault location according to the detection result; The preset fault self-healing rules include: If it is determined that the fault location is a feeder, the bus terminal outputs a trip contact signal to control the corresponding switch to open the circuit breaker to isolate the fault location; If it is determined that the fault location is the busbar, the overcurrent direction protection and the undervoltage trip control corresponding switches are switched on to isolate the fault location, and when the busbar terminal is not discharged, the corresponding switches are controlled to close to restore power supply to the non-fault area, wherein the current direction of the overcurrent direction protection points to the busbar, and the overcurrent direction protection does not operate; If it is determined that the fault location is the main line, the line differential protection is exited and the overcurrent directional protection and undervoltage trip control corresponding switches are opened to isolate the fault location, and when the bus terminal is not discharged, the corresponding switches are controlled to close to restore power supply to the non-fault area, wherein the current direction of the overcurrent directional protection points to the line.