Power distribution room triple fault self-recovery method and system

Abstract

The invention relates to a power distribution room triple fault self-recovery method and system, and the method comprises the steps: matching a corresponding fault self-recovery strategy according to the fault position of a power distribution room, and the fault self-recovery strategy is a combined strategy of a basic strategy based on grading protection, reclosing and fast fuse, and at least one of a spare power automatic switching strategy and a centralized FA strategy; if the re-pressing locking function does not exist, the basic strategy is to prolong the quick-break protection action time of the in-station outgoing line switch, set the fixed time stage difference of protection of upper and lower circuit breakers, and combine reclosing and quick fuse; and if a re-voltage locking function exists, the basic strategy is to start the re-voltage locking function of quick-break protection of the in-station outgoing line switch, set a fixed time stage difference of protection of upper and lower circuit breakers, and combine reclosing and quick fuse. According to the invention, the power failure time is greatly shortened, the power utilization experience of a user is improved, and the requirement of the user on good power utilization is met.

Description

Technical Field

[0001] This invention relates to the field of power distribution room fault self-healing technology, and in particular to a method and system for triple fault self-healing in power distribution rooms. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] As users' electricity needs shift from "having access to electricity" to "having reliable electricity," higher requirements are being placed on power supply reliability. However, the current operation of power distribution rooms and related power lines still presents many problems affecting power supply stability, necessitating targeted technical optimization.

[0004] As a key facility in the power system responsible for distributing electrical energy, the substation connects the high-voltage power grid to the user side. The stable operation of the substation directly affects the continuity of power supply to users. Therefore, fault self-healing strategies are particularly important. Fault self-healing refers to a technical system that uses automation technology to monitor the system status in real time and automatically completes fault diagnosis, isolation, and recovery operations without human intervention when a fault occurs.

[0005] Currently, most high-voltage switchgear in operating substations lacks automation, and protection configurations are inadequate. Simultaneously, 10kV distribution lines suffer from unreasonable segmentation, non-automatic or non-existent tie switches, and other network structure issues. When a fault occurs, power restoration relies primarily on manual operation to transfer loads. In existing technologies, faults often result in complete substation outages, leading to significant regional power outages. Furthermore, the dual-power supply function of substations cannot function quickly, resulting in prolonged outages and increasing the likelihood of customer complaints and other poor power service incidents, failing to meet users' demands for reliable electricity. Summary of the Invention

[0006] This invention proposes a triple fault self-healing method and system for power distribution rooms. Based on the commissioning and online operation of the 10kV high-voltage switchgear in the power distribution room, it innovatively integrates and applies a triple fault self-healing strategy of "hierarchical protection + reclosing + fast fuse, automatic transfer switch, and centralized FA". The triple strategy utilizes delay and information sharing to achieve coordinated actions.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for self-healing triple faults in a power distribution room, comprising: Obtain the location of the fault in the power distribution room and the type of power distribution line on the affected line; According to the location of the fault in the power distribution room, a corresponding fault self-healing strategy is matched. The fault self-healing strategy is a combination of at least one of the basic strategies based on hierarchical protection, reclosing, and fast fuse, and backup automatic transfer strategy and centralized FA strategy. Specifically, based on the type of power distribution line where the power distribution room is located, it is determined whether there is a voltage interlocking function. If there is no voltage interlocking function, the basic strategy is to extend the action time of the instantaneous overcurrent protection of the outgoing line switch in the station, set a fixed time difference between the protection of the upper and lower level circuit breakers, and combine reclosing and fast fuses. If there is a voltage interlocking function, the basic strategy is to enable the voltage interlocking function of the instantaneous overcurrent protection of the outgoing line switch in the station, set a fixed time difference between the protection of the upper and lower level circuit breakers, and combine reclosing and fast fuses.

[0008] A further technical solution is that the obtained power distribution line types include short overhead power distribution lines, pure cable power distribution lines, and long overhead power distribution lines; if the power distribution line type is a short overhead power distribution line or a pure cable power distribution line, and the overvoltage interlocking function cannot limit the instantaneous overcurrent protection range of the outgoing switch in the station, it is determined that there is no overvoltage interlocking function; if the power distribution line type is a long overhead power distribution line, and the overvoltage interlocking function can limit the instantaneous overcurrent protection range of the outgoing switch in the station, it is determined that there is an overvoltage interlocking function.

[0009] In a further technical solution, the fault location of the power distribution room includes internal faults, faults in the front-end non-faulty section, faulty sections, and faulty sections in the back-end non-faulty section.

[0010] Further technical solutions include matching the basic strategy when the fault location of the power distribution room is an internal fault or the power distribution room is located in a non-faulty section at the front end; matching the combination strategy of the basic strategy and the automatic transfer strategy when the fault location of the power distribution room is located in a faulty section; and matching the combination strategy of the basic strategy, the automatic transfer strategy and the centralized FA strategy when the fault location of the power distribution room is located in a non-faulty section at the back end.

[0011] A further technical solution is that the backup automatic transfer strategy includes protection setting configuration, which includes at least the bus no-voltage threshold value, the bus voltage threshold value, the line no-voltage threshold value, the line voltage threshold value, the no-current threshold value, the backup automatic transfer tripping delay, and the tripping delay.

[0012] A further technical solution is that the centralized FA strategy includes fault handling procedure initiation, interval determination, interval isolation, power supply restoration on the power supply side, power transfer to the non-faulty power outage interval on the load side, and power supply restoration after the fault is cleared.

[0013] A further technical solution is that the fault handling program is started under the following conditions: when the switch tripping and protection action signals are obtained, and the time difference between the switch tripping and protection action signals is within a preset range, the fault handling program is started; when the reclosing function is available and reclosing is successful, the fault handling program is terminated.

[0014] Secondly, the present invention provides a triple fault self-healing system for power distribution rooms, comprising: The information acquisition module is configured to: acquire the location of the fault in the power distribution room and the type of power distribution line of the line in question; The fault self-healing strategy matching module is configured to match the corresponding fault self-healing strategy according to the fault location in the power distribution room. The fault self-healing strategy is a combination of at least one of the basic strategies based on hierarchical protection, reclosing, and fast fuse, and the backup automatic transfer strategy and centralized FA strategy. Specifically, based on the type of power distribution line where the power distribution room is located, it is determined whether there is a voltage interlocking function. If there is no voltage interlocking function, the basic strategy is to extend the action time of the instantaneous overcurrent protection of the outgoing line switch in the station, set a fixed time difference between the protection of the upper and lower level circuit breakers, and combine reclosing and fast fuses. If there is a voltage interlocking function, the basic strategy is to enable the voltage interlocking function of the instantaneous overcurrent protection of the outgoing line switch in the station, set a fixed time difference between the protection of the upper and lower level circuit breakers, and combine reclosing and fast fuses.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention identifies the fault location in the substation, determines different fault scenarios, and applies corresponding fault self-healing strategies for each scenario. By innovatively integrating a triple fault self-healing strategy of "tiered protection + reclosing + fast fuse, automatic transfer switch, and centralized power supply," power can be rapidly restored to non-faulty sections or substations within 8 to 30 seconds. Compared to traditional methods relying on manual operation, this significantly shortens power outage time, effectively reduces the probability of user complaints and other poor power supply service incidents, improves user experience, and meets users' needs for "good power." Simultaneously, it can compensate for network structure problems such as unreasonable distribution network segmentation and insufficient effective interconnection, solve regional power outage problems, and improve the stability and reliability of the power supply system. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute a limitation thereof.

[0017] Figure 1 This is a flowchart of the self-healing method for triple faults in the power distribution room in this invention; Figure 2 This is a schematic diagram of the three-level protection action time configuration in the first type of circuit without overvoltage blocking function in this invention; Figure 3 This is a schematic diagram of the three-level protection action time configuration in the second type of circuit without overvoltage blocking function in this invention; Figure 4 This is a schematic diagram of the three-level protection action time configuration in the third type of circuit without overvoltage blocking function in this invention; Figure 5This is a schematic diagram of the three-level protection action time configuration in the fourth type of circuit without overvoltage blocking function in this invention; Figure 6 This is a schematic diagram of the three-level protection action time configuration in the fifth type of circuit without overvoltage blocking function in this invention; Figure 7 This is a schematic diagram of the three-level protection action time configuration in the sixth type of circuit without overvoltage blocking function in this invention; Figure 8 This is a schematic diagram of the three-level protection action time configuration in the first type of circuit with overvoltage blocking function in this invention; Figure 9 This is a schematic diagram of the three-level protection action time configuration in the first type of circuit with overvoltage blocking function in this invention. Detailed Implementation Example 1 To achieve the above objectives, the present invention adopts the following technical solution: This embodiment provides a method for self-healing triple faults in a power distribution room, such as... Figure 1 As shown, the first step is to obtain the fault location of the substation and the type of the power distribution line, which is used to match the fault self-healing strategy. Then, based on the fault location in the substation, a corresponding fault self-healing strategy is matched. The fault self-healing strategy is a combination of at least one of the following: a basic strategy based on hierarchical protection, reclosing, and fast fuses, and a backup automatic transfer strategy or a centralized FA strategy. This embodiment innovatively integrates and applies a triple fault self-healing strategy of "hierarchical protection + reclosing + fast fuses, backup automatic transfer, and centralized FA," with the three strategies utilizing delay and information sharing to achieve coordinated action.

[0018] In this embodiment, the location of a power distribution room fault includes internal power distribution room faults, faults in the front-end non-faulty section, faulty sections, and faulty sections in the back-end non-faulty section. When the fault location of the distribution room is an internal fault or the distribution room is located in a non-faulty section at the front end, the basic strategy is matched, which uses the "hierarchical protection + reclosing + fast fuse" strategy to quickly restore power supply to the non-faulty section of the distribution room within 8 seconds. When the fault location of the distribution room is located in a faulty section, a combined strategy of the basic strategy and the automatic transfer switch strategy is matched, which uses the "hierarchical protection + reclosing + fast fuse, automatic transfer switch" strategy to quickly restore power supply to the distribution room within a maximum of 10 seconds. When the fault location of the distribution room is located in a non-faulty section at the back end, a combined strategy of the basic strategy, the automatic transfer switch strategy, and the centralized FA strategy is matched, which uses the "hierarchical protection + reclosing + fast fuse, automatic transfer switch, centralized FA" strategy to quickly restore power supply to the distribution room within a maximum of 10 seconds. When the effective connection of the line is insufficient, the power supply to the non-faulty section at the back end can be quickly restored within a maximum of 30 seconds. This can compensate for network structure problems such as unreasonable distribution network segmentation and insufficient effective connection.

[0019] In this embodiment, the presence of a voltage interlocking function is determined based on the type of the power distribution line where the power distribution room is located. The obtained power distribution line types include short overhead power distribution lines, pure cable power distribution lines, and long overhead power distribution lines. If the power distribution line type is a short overhead power distribution line or a pure cable power distribution line, and the voltage interlocking function cannot limit the instantaneous overcurrent protection range of the outgoing switch in the station, it is determined that there is no voltage interlocking function. If the power distribution line type is a long overhead power distribution line, and the voltage interlocking function can limit the instantaneous overcurrent protection range of the outgoing switch in the station, it is determined that there is a voltage interlocking function.

[0020] For 10kV short overhead or pure cable public distribution lines where the instantaneous overcurrent protection range of outgoing switches within the station cannot be limited by the overvoltage interlocking function, the basic strategy adopted is to extend the operating time of the instantaneous overcurrent protection of outgoing switches within the station, set a fixed time difference between the protection of upper and lower level circuit breakers, and combine reclosing and fast-acting fuses. The operating time configuration for each level of circuit breaker is as follows: Figure 2-7 As shown, the operating time of the low backup time-limited overcurrent protection of the main transformer is 0.6s to trip the segment and 0.8s to trip the local side. The operating time of the overvoltage overcurrent protection is 0.8s (1.0s) to trip the segment and 1.0s (1.2s) to trip the local side. The operating time limits of the other protection segments of the main transformer are configured step by step according to the time difference, and the difference is not greater than 0.3s. If the upstream line of the main transformer needs to be modified in coordination, the setting value must be modified at the same time.

[0021] For substations that have completed the short-circuit withstand capability upgrade of the main transformer, the instantaneous trip protection action time of the 10kV public distribution line outgoing switch is extended from 0.12s to 0.22s, the time-limited instantaneous trip protection action time is 0.4s, and the overcurrent protection action time is 0.6s. The overcurrent stage I protection setting time of the external first-level branch circuit breaker is 0.1s, and the overcurrent stage II action time is 0.4s. The overcurrent stage I protection setting time of the external boundary circuit breaker is 0s, and the overcurrent stage II action time is 0.2s. The current setting calculation principle can refer to the "Technical Specification for Relay Protection Setting Calculation of Shandong Distribution Network". It is necessary to ensure that the protection coordination of circuit breakers forming a hierarchical relationship achieves complete coordination of time and current. In this embodiment, the protection stage difference is 0.1s, requiring the external circuit breaker to operate reliably within 0.1s; otherwise, it may cause over-tripping.

[0022] For 10kV long overhead public distribution lines where the range of instantaneous overcurrent protection of outgoing switches within the station can be limited through the overvoltage interlocking function, the basic strategy adopted is to enable the overvoltage interlocking function of the instantaneous overcurrent protection of outgoing switches within the station, set a fixed time difference between the protection of upstream and downstream circuit breakers, and combine reclosing and fast-acting fuses. The operating time of each level of circuit breaker is configured as follows: Figure 8-9As shown, the operating time of the low backup time-limited overcurrent protection of the main transformer is 0.6s to trip the segment and 0.8s to trip the local side. The operating time of the overvoltage overcurrent protection is 0.8s (1.0s) to trip the segment and 1.0s (1.2s) to trip the local side. The operating time limits of the other protection segments of the main transformer are configured step by step according to the time difference, and the difference is not greater than 0.3s. If the upstream line of the main transformer needs to be modified in coordination, the setting value must be modified at the same time.

[0023] The instantaneous overcurrent protection of the outgoing line switches within the 10kV line has an operating time of 0.12s. This instantaneous overcurrent protection can be configured with a voltage overvoltage blocking function, using voltage values ​​to limit the protection range so that it does not exceed the operating range of the first-level protected circuit breaker outside the station. The time-limited instantaneous overcurrent protection of the outgoing line switches within the station has an operating time of 0.4s, and the overcurrent protection has an operating time of 0.6s. External circuit breakers are configured with 0.1s or 0.2s increments. External circuit breakers are required to operate reliably within 0.1s; otherwise, cascading tripping may occur. The calculation principles for voltage and current settings can refer to the "Technical Specification for Relay Protection Setting Calculation in Shandong Distribution Network," ensuring complete coordination of time and current for circuit breaker protections in hierarchical relationships.

[0024] In this embodiment, the backup automatic transfer strategy includes protection setting configuration, wherein the protection setting includes at least the bus no-voltage threshold value of 30V (secondary value), the bus voltage threshold value of 70V (secondary value), the line no-voltage threshold value of 30V (secondary value), the line voltage threshold value of 70V (secondary value), the no-current threshold value of 0.02A (secondary value), the backup automatic transfer tripping delay of 10S and the closing delay of 0.3S.

[0025] In this embodiment, the centralized FA strategy includes fault handling procedure initiation, interval determination, interval isolation, power supply restoration on the power source side, power transfer to the non-faulty power outage interval on the load side, power supply restoration after fault clearance, and restoration to the pre-fault state. Specifically: The fault handling procedure is initiated when the following conditions are met: both switch tripping and protection action signals are received, and the time difference between the switch tripping and protection action signals is within a preset range. The fault handling procedure terminates when reclosing is available and successful. Specifically: For 10kV switches inside and outside the station tripping and protection signals (including general fault, overcurrent, and instantaneous trip signals) are activated, the switch tripping and protection action signals require time coordination. When the protection action signal is received first, followed by the switch tripping signal, the default time difference is within 30 seconds. When the switch tripping signal is received first, followed by the protection action signal, the default time difference is within 5 seconds. Fault handling will not be initiated if this time limit is exceeded. The system now has a customizable coordination time for protection and tripping. When reclosing is available and successful, if it is a transient fault, only the fault range is determined, and the fault handling procedure ends; if there is no reclosing or reclosing fails, the next stage of processing is performed.

[0026] Section determination: 1) The fault section is determined by using the fault alarm signal sent by the automatic sectionalizing switch on the line (considering the delay between the substation signal and the signal of the external terminal, the system will remain active for 180 seconds after the main station receives the fault alarm signal). The fault section determination result is the load side section of the automatic switch at the end of the line that sends the fault signal. The boundary of this section is the automatic switch with normal communication.

[0027] 2) When determining the fault section, if there is a user boundary switch at the boundary of the power supply topology island of the substation outgoing switch, first determine the correlation between the tripping events of the user boundary switch and the substation outgoing switch (the principle is that the difference between the power outage time of the load side section of the user boundary switch and the previous tripping time of the substation outgoing switch is within 20 seconds, and the protection signal of the user boundary switch is still within the effective time range, then the tripping of the user boundary switch and the substation outgoing switch is considered to be caused by the same event). If the result of the correlation determination of the tripping events of the user boundary switch and the substation outgoing switch is "correlated", the fault section is determined to be all the power outage sections below the user boundary switch; otherwise, the fault section is determined according to the "fault signal location method" for centralized fault sections.

[0028] Intersection isolation and power supply restoration on the power side: 1) After the interval determination is completed, the system will automatically isolate and restore power supply to non-faulty intervals only for lines set to self-healing mode (system fault handling mode set to "fully automatic").

[0029] 2) The principle of preparing isolation operation tickets in self-healing mode is to isolate all automatic switches at the boundary of the fault zone (excluding local status, operation prohibited, hanging and holding signs, maintenance signs, fault signs, offline equipment and user boundary switches (because the operating power is AC 220V, the equipment itself does not have the ability to remotely trip after power failure).

[0030] 3) The principle for creating a manual isolation operation ticket (system fault handling mode is set to "manual") is that an isolation operation ticket will only be created and used for isolation if there is a transfer path in the area to be transferred.

[0031] 4) If a switch fails to operate during the execution of an isolation operation ticket, the program will treat the switch as an operation prohibited switch and enter the load transfer process to recalculate the load. Only after a transfer strategy exists in the transfer interval will the isolation operation of the expanded interval be performed.

[0032] 5) If the outgoing switch of the substation fails to operate, the outgoing switch of the substation will be treated as an operation prohibited switch, and the load transfer process will be entered again to calculate the load and find other paths to transfer power to the outage area.

[0033] Power transfer to non-fault outage sections on the load side: 1) After isolation and power supply restoration on the power supply side are completed, the load transfer process is initiated on the load side to calculate the load and generate an operation strategy for load transfer.

[0034] 2) When executing the load transfer strategy, if a switch fails to operate, the switch that fails to operate will be treated as an operation prohibited switch, and the load transfer process will be entered on the load side to recalculate the load and generate a new strategy for load transfer.

[0035] 3) The load transfer calculation involves numerous and complex checks. These include the main transformer capacity of the substation, the distribution line capacity, the maximum allowable current through the line switch, the maximum allowable voltage drop of the line, the maximum allowable current through the section, the ring network status, whether the real-time current acquisition of the substation, transformer, and distribution line is normal, and the online status of the switches to be operated.

[0036] 4) The load transfer strategy aims to minimize power outages and takes into account line load balancing to a certain extent.

[0037] Power supply restoration after fault clearance: After the fault section is cleared, this line will be used for power supply first. If the load transfer calculation finds that this line does not meet the conditions for load transfer, then the load-side transfer path will be considered for transfer.

[0038] Restoring to the pre-fault state: An operation ticket to restore the operation mode to the pre-fault state will only be automatically generated if there are no power outage sections on the line.

[0039] Example 2 This embodiment provides a triple fault self-healing system for a power distribution room, which specifically includes the following modules: The information acquisition module is configured to: acquire the location of the fault in the power distribution room and the type of power distribution line of the line in question; The fault self-healing strategy matching module is configured to match the corresponding fault self-healing strategy according to the fault location in the power distribution room. The fault self-healing strategy is a combination of at least one of the basic strategies based on hierarchical protection, reclosing, and fast fuse, and the backup automatic transfer strategy and centralized FA strategy. Specifically, based on the type of power distribution line where the power distribution room is located, it is determined whether there is a voltage interlocking function. If there is no voltage interlocking function, the basic strategy is to extend the action time of the instantaneous overcurrent protection of the outgoing line switch in the station, set a fixed time difference between the protection of the upper and lower level circuit breakers, and combine reclosing and fast fuses. If there is a voltage interlocking function, the basic strategy is to enable the voltage interlocking function of the instantaneous overcurrent protection of the outgoing line switch in the station, set a fixed time difference between the protection of the upper and lower level circuit breakers, and combine reclosing and fast fuses.

[0040] The implementation of the specific modules in this embodiment refers to the steps of the self-healing method for triple faults in a power distribution room described in Embodiment 1, and will not be described in detail here.

[0041] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A method for self-healing triple faults in a power distribution room, characterized in that, include: Obtain the location of the fault in the power distribution room and the type of power distribution line on the affected line; According to the location of the fault in the power distribution room, a corresponding fault self-healing strategy is matched. The fault self-healing strategy is a combination of at least one of the basic strategies based on hierarchical protection, reclosing, and fast fuse, and backup automatic transfer strategy and centralized FA strategy. Specifically, based on the type of power distribution line where the power distribution room is located, it is determined whether there is a voltage interlocking function. If there is no voltage interlocking function, the basic strategy is to extend the action time of the instantaneous overcurrent protection of the outgoing line switch in the station, set a fixed time difference between the protection of the upper and lower level circuit breakers, and combine reclosing and fast fuses. If there is a voltage interlocking function, the basic strategy is to enable the voltage interlocking function of the instantaneous overcurrent protection of the outgoing line switch in the station, set a fixed time difference between the protection of the upper and lower level circuit breakers, and combine reclosing and fast fuses.

2. The method for self-healing triple faults in a power distribution room as described in claim 1, characterized in that, The obtained power distribution line types include short overhead power distribution lines, pure cable power distribution lines, and long overhead power distribution lines. If the power distribution line type is a short overhead power distribution line or a pure cable power distribution line, and the overvoltage interlocking function cannot limit the instantaneous overcurrent protection range of the outgoing switch in the station, it is determined that there is no overvoltage interlocking function. If the power distribution line type is a long overhead power distribution line, and the overvoltage interlocking function can limit the instantaneous overcurrent protection range of the outgoing switch in the station, it is determined that there is an overvoltage interlocking function.

3. The method for self-healing triple faults in a power distribution room as described in claim 1, characterized in that, The fault locations in the power distribution room include internal faults, faults in the front-end non-faulty section, faulty sections, and faulty sections in the back-end non-faulty section.

4. The method for self-healing triple faults in a power distribution room as described in claim 3, characterized in that, When the fault location of the power distribution room is an internal fault or the power distribution room is in a non-faulty section at the front end, the basic strategy is matched; when the fault location of the power distribution room is in a faulty section, a combination strategy of the basic strategy and the automatic transfer switch strategy is matched; when the fault location of the power distribution room is in a non-faulty section at the back end, a combination strategy of the basic strategy, the automatic transfer switch strategy and the centralized FA strategy is matched.

5. The method for self-healing triple faults in a power distribution room as described in claim 1, characterized in that, The backup automatic transfer strategy includes protection setting configuration, which includes at least the bus no-voltage threshold value, bus voltage threshold value, line no-voltage threshold value, line voltage threshold value, no-current threshold value, backup automatic transfer tripping delay, and tripping delay.

6. The method for self-healing triple faults in a power distribution room as described in claim 1, characterized in that, The centralized FA strategy includes fault handling procedure initiation, interval determination, interval isolation, power supply restoration on the power supply side, power transfer to non-faulty power outage intervals on the load side, and power supply restoration after fault clearance.

7. A method for self-healing triple faults in a power distribution room as described in claim 6, characterized in that, The fault handling program is started when the switch tripping and protection action signals are obtained and the time difference between the switch tripping and protection action signals is within a preset range; when the reclosing function is available and reclosing is successful, the fault handling program ends.

8. A triple fault self-healing system for a power distribution room, characterized in that, include: The information acquisition module is configured to: acquire the location of the fault in the power distribution room and the type of power distribution line of the line in question; The fault self-healing strategy matching module is configured to match the corresponding fault self-healing strategy according to the fault location in the power distribution room. The fault self-healing strategy is a combination of at least one of the basic strategies based on hierarchical protection, reclosing, and fast fuse, and the backup automatic transfer strategy and centralized FA strategy. Specifically, based on the type of power distribution line where the power distribution room is located, it is determined whether there is a voltage interlocking function. If there is no voltage interlocking function, the basic strategy is to extend the action time of the instantaneous overcurrent protection of the outgoing line switch in the station, set a fixed time difference between the protection of the upper and lower level circuit breakers, and combine reclosing and fast fuses. If there is a voltage interlocking function, the basic strategy is to enable the voltage interlocking function of the instantaneous overcurrent protection of the outgoing line switch in the station, set a fixed time difference between the protection of the upper and lower level circuit breakers, and combine reclosing and fast fuses.

9. A computer-readable storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the self-healing method for triple faults in a power distribution room as described in any one of claims 1-7.

10. An electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the self-healing method for triple faults in a power distribution room as described in any one of claims 1-7.

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