Adaptive detection method and device for feeder automation line short circuit fault and medium

Abstract

The application belongs to the field of electric power, and particularly relates to a self-adaptive detection method for short-circuit fault of a feeder automation line, which comprises the following steps: detecting whether there is an overcurrent signal in a current distribution terminal; selecting to acquire the communication state between the current distribution terminal and a superior or inferior distribution terminal according to the detection of whether there is an overcurrent signal in the current distribution terminal; and switching the feeder automation mode of a distribution network according to the acquisition of the communication state between the current distribution terminal and the superior or inferior distribution terminal. The application also relates to a device for implementing the method and a medium for executing the method. The current distribution terminal selects a fault processing mode according to the communication state between the superior and inferior distribution terminals and whether the current distribution terminal detects an overcurrent signal, so that the fault detection work can be accurately performed even in the case of unstable communication state, and the adaptability is stronger.

Description

Technical Field

[0001] This invention belongs to the field of power, and particularly relates to an adaptive detection method, device and medium for short-circuit faults in feeder automation lines. Background Technology

[0002] Currently, there are two automatic methods for handling short-circuit faults on 10kV overhead distribution lines. One method involves the logical coordination between the substation's outgoing circuit breakers and the distribution automation switches on the line to achieve local identification and isolation of the fault, and restoration of power to non-faulty sections. The other method utilizes communication between distribution terminals to achieve fault location, isolation, and automatic restoration of power to non-faulty areas. Both methods can report the processing and results to the distribution automation master station via the distribution terminals. The former method does not rely on communication for fault handling but requires multiple reclosing operations to locate and isolate the fault and restore power to non-faulty areas, resulting in a poor user experience. The latter method relies entirely on stable communication; if one or more distribution terminals on the line experience communication failures, fault handling becomes impossible.

[0003] In local feeder automation systems, distribution terminals often use wireless communication to exchange information with each other and with the main distribution station. However, due to the instability of wireless communication, after a fault occurs on the line, the distribution terminals cannot reliably exchange fault handling information. In this scenario, if any distribution terminal on the feeder automation line experiences a communication failure, the fault handling mode for the entire line will be locked out, preventing automatic fault handling. Summary of the Invention

[0004] In view of this, given the unstable state of line communication, it is necessary to improve the existing method for identifying short-circuit fault sections in local feeder automation lines in order to enhance the adaptability of fault handling methods.

[0005] To address or improve the above problems, this invention provides an adaptive detection method for short-circuit faults in feeder automation lines, the specific technical solution of which is as follows:

[0006] This invention provides an adaptive detection method for short-circuit faults in feeder automation lines, comprising: detecting whether an overcurrent signal exists in the local distribution terminal; selecting and acquiring the communication status between the local distribution terminal and the upstream or downstream distribution terminal based on the detection result of the overcurrent signal; and switching the feeder automation mode of the distribution network based on the acquisition result of the communication status.

[0007] Preferably, the method further includes: recording the communication delay T1 between the local power distribution terminal and the upper or lower level power distribution terminal; comparing the communication delay T1 with the communication status judgment time parameter T: if T1≥T, then it is determined that there is a communication failure between the local switch and the upper or lower level power distribution terminal; otherwise, the communication is normal.

[0008] Preferably, the feeder automation method includes at least two methods: local reclosing feeder automation and slow-motion distributed feeder automation.

[0009] Preferably, the method further includes: if the overcurrent signal exists in the current-level power distribution terminal, then obtaining the communication status between the current-level power distribution terminal and the next-level power distribution terminal; if the overcurrent signal does not exist in the current-level power distribution terminal, then obtaining the communication status between the current-level power distribution terminal and the next-level power distribution terminal.

[0010] Preferably, the method further includes: if there is a communication fault between the local distribution terminal and the upper or lower level distribution terminal, the feeder automation mode of the distribution network is switched to local reclosing feeder automation; if there is no communication fault between the local distribution terminal and the upper or lower level distribution terminal, the feeder automation mode of the distribution network is switched to slow-motion distributed feeder automation.

[0011] Preferably, the method further includes: based on the detection result of the overcurrent signal by the local power distribution terminal, querying the next or previous level power distribution terminal to see if there is an overcurrent signal; based on the query result of the overcurrent signal of the next or previous level power distribution terminal, the local power distribution terminal closes the corresponding switch.

[0012] Preferably, the method further includes: tripping the local distribution terminal in case of voltage loss; the main distribution station supplies power to the local distribution terminal, and the local distribution terminal continuously monitors the voltage on the power supply side; if the voltage on the power supply side loses voltage within a set time X, the local distribution terminal maintains the tripped position and reversely blocks the closing; if the voltage on the power supply side does not lose voltage within the set time X, the local distribution terminal automatically closes; if the voltage on the power supply side loses voltage within a set time Y, the local distribution terminal automatically trips and forward blocks the closing; if the voltage on the power supply side does not lose voltage within the set time X, the switch of the local distribution terminal automatically closes; if the voltage on the power supply side does not lose voltage within the set time Y, the fault point is identified as being in the local distribution terminal, and the local distribution terminal takes corresponding actions.

[0013] The present invention also provides a computer-readable storage medium, which includes storing at least one instruction, at least one program, code set, or instruction set, wherein, when the instruction, program, code set, or instruction set is executed, the device containing the computer-readable storage medium is controlled to perform an adaptive detection method for feeder automation line short-circuit faults.

[0014] The present invention also provides an adaptive detection device for short-circuit faults in feeder automation lines, including a processor, a memory, and at least one instruction, at least one program, code set, or instruction set stored in the memory and configured to be executed by the processor. When the processor executes the instruction, program, code set, or instruction set, it implements an adaptive detection method for short-circuit faults in feeder automation lines.

[0015] The present invention also provides an adaptive detection device for short-circuit faults in feeder automation lines, comprising: a first unit for detecting whether there is an overcurrent signal in the local distribution terminal; a second unit for selecting and acquiring the communication status between the local distribution terminal and the upper or lower level distribution terminal based on the detection result of the overcurrent signal; and a third unit for switching the feeder automation mode of the distribution network based on the acquisition result of the communication status.

[0016] The beneficial effects of this invention are as follows: The local power distribution terminal can determine its communication status with either the upstream or downstream power distribution terminal based on the overcurrent signal detection results, and then select the fault handling mode according to the communication status. Compared with existing feeder automation systems, this method can integrate two fault handling methods, fully utilizing their respective advantages, and is more adaptable. Even in situations with unstable communication, it can accurately perform fault detection, making it particularly suitable for the construction and upgrading of feeder automation lines using wireless communication. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the adaptive detection working principle of the local feeder automation line short-circuit fault section of the present invention.

[0018] Figure 2 This is a flowchart of the adaptive detection process for short-circuit fault sections in the local feeder automation system of the present invention.

[0019] Figure 3 This is a flowchart illustrating the steps of an adaptive detection method for short-circuit fault sections in local feeder automation, which is another optional embodiment of the present invention.

[0020] Figure 4 This is a flowchart illustrating the steps of an adaptive detection method for short-circuit fault sections in a local feeder automation system, which is another optional embodiment of the present invention.

[0021] Figure 5 This is a flowchart illustrating the steps of an adaptive detection method for short-circuit fault sections in a local feeder automation system, which is an optional embodiment of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0025] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0026] To address or improve the problem of unstable line communication, the following measures are proposed: Figure 1-2 An adaptive detection method for short-circuit faults in feeder automation lines, as shown, includes:

[0027] When a short-circuit fault occurs on the line, after the outgoing circuit breaker of the substation trips, the local distribution terminal selects the fault handling mode based on the communication status with the upstream and downstream distribution terminals and whether the local distribution terminal has detected an overcurrent signal:

[0028] When the local distribution terminal detects an overcurrent signal, if communication with the next-level distribution terminal is normal, the slow-motion distributed feeder automation is used for fault handling. If communication with the next-level distribution terminal fails, the local distribution terminal switches to local reclosing feeder automation for fault handling.

[0029] When no overcurrent signal is detected in the local distribution terminal, if communication with the next-level distribution terminal is normal, the fault is handled by slow-motion distributed feeder automation. If there is a communication failure with the next-level switch, the local distribution terminal switches to local reclosing feeder automation for fault handling.

[0030] The steps for determining the communication status between adjacent distribution automation terminals are as follows:

[0031] Record the communication delay T1 between this level power distribution terminal and the upper or lower level power distribution terminal; compare the communication delay T1 with the communication status judgment time parameter T: if T1≥T, then determine that there is a communication fault between this level switch and the upper or lower level power distribution terminal; otherwise, the communication is normal.

[0032] The steps for detecting and isolating fault sections in the slow-motion distributed feeder automation mode specifically include:

[0033] After a substation outgoing circuit breaker trips, if the local distribution terminal detects an overcurrent signal, it will inquire with the next-level distribution terminal whether it has also detected an overcurrent signal, since communication with the next-level distribution terminal is normal. Two scenarios will occur: If the next-level switch does not detect an overcurrent signal, the fault point can be determined to be between the local switch and the next-level switch, and the local distribution terminal will automatically trip and lock the closing position; if the next-level distribution terminal also detects an overcurrent signal, the fault point is determined not to be between the local distribution terminal and the next-level distribution terminal, and the local distribution terminal will maintain the switch in the closed position.

[0034] After a substation outgoing circuit breaker trips, if the local distribution terminal does not detect an overcurrent signal, it will inquire with the upstream distribution terminal whether it has also detected an overcurrent signal, since communication with the upstream distribution terminal is normal. Two scenarios will occur: If the upstream distribution terminal detects an overcurrent signal, the fault point can be determined to be between the local and upstream distribution terminals, and the switch of the local distribution terminal will automatically open and lock the closing position; if the upstream distribution terminal does not detect an overcurrent signal, the fault point is determined not to be between the local and upstream distribution terminals, and the switch of the local distribution terminal will remain in the closed position.

[0035] The steps for detecting and isolating faulty sections in the local reclosing feeder automation mode specifically include:

[0036] After a substation outgoing circuit breaker trips, in two scenarios—either the local distribution terminal detects an overcurrent signal and experiences a communication failure with the next-level distribution terminal, or the local distribution terminal does not detect an overcurrent signal but experiences a communication failure with the previous-level distribution terminal—the local distribution terminal's switch will trip due to undervoltage. When the substation outgoing circuit breaker recloses, three scenarios may occur:

[0037] Power is supplied to the local distribution terminal. The local distribution terminal detects that there is voltage on the power supply side. If the voltage is lost within the set time limit X, it is determined that the fault point is before the local distribution terminal. The switch of the local distribution terminal will remain in the open position and be blocked from closing in the reverse direction.

[0038] When power is supplied to the local distribution terminal, the local distribution terminal detects that there is voltage on the power supply side. After the voltage remains stable and X time limit has elapsed, the switch of the local distribution terminal automatically closes. If there is a voltage loss within the set time limit Y, it is determined that the fault point is after the local distribution terminal, and the switch of the local distribution terminal automatically opens and is positively locked and closed.

[0039] When power is supplied to the local distribution terminal, the local distribution terminal detects that there is voltage on the power supply side. After the voltage remains stable and a time limit of X has elapsed, the switch of the local distribution terminal automatically closes. If there is still voltage within the set time limit of Y, it is determined that the fault point is not in the local distribution terminal and is not between the local distribution terminal and the next level distribution terminal. The local distribution terminal then takes corresponding actions.

[0040] Even in situations where communication is unstable, this technical solution can accurately detect faults and pinpoint the fault location. It is more adaptable and particularly suitable for the construction and upgrading of feeder automation lines using wireless communication.

[0041] This invention also provides a computer-readable storage medium, which includes storing at least one instruction, at least one program, code set, or instruction set, wherein the instruction, program, code set, or instruction set controls the device where the computer-readable storage medium is located to execute an adaptive detection method for feeder automation line short-circuit faults when the instruction, program, code set, or instruction set is executed.

[0042] This invention also provides an adaptive detection device for short-circuit faults in feeder automation lines, including a processor, a memory, and at least one instruction, at least one program, code set, or instruction set stored in the memory and configured to be executed by the processor. When the processor executes the instruction, program, code set, or instruction set, it implements an adaptive detection method for short-circuit faults in feeder automation lines.

[0043] This invention also provides an adaptive detection device for short-circuit faults in feeder automation lines, comprising: a first unit for detecting whether an overcurrent signal exists in the local distribution terminal; a second unit for selecting and acquiring the communication status between the local distribution terminal and an upstream or downstream distribution terminal based on the detection result of the overcurrent signal; and a third unit for switching the feeder automation mode of the distribution network based on the acquisition result of the communication status.

[0044] As another optional embodiment:

[0045] The adaptive detection method for short-circuit faults in feeder automation lines of the present invention, combined with Figure 3 The following steps are used to illustrate the adaptive detection working principle of local feeder automation line short-circuit fault sections:

[0046] Step S101: After a short circuit fault occurs, the overcurrent protection of the substation outgoing circuit breaker will trip. The distribution automation terminal on the line will detect the line undervoltage and any distribution terminal on the line will determine whether there is an overcurrent signal.

[0047] Step S102: Based on the result of step S101, the local distribution terminal determines with which level of distribution terminal to perform the communication delay test. If an overcurrent signal exists, the local distribution terminal performs the communication delay test with the next level of distribution terminal; if no overcurrent signal exists, the local distribution terminal performs the communication delay test with the previous level of distribution terminal.

[0048] Step S103: Based on the communication delay test performed in S102, determine the communication status between the local power distribution terminal and adjacent power distribution terminals. Record the communication delay T1 between the local power distribution terminal and adjacent power distribution terminals; compare the communication delay T1 with the communication status judgment time parameter T. If T1 ≥ T, then determine that there is a communication fault between the local power distribution terminal and adjacent power distribution terminals; otherwise, the communication is normal.

[0049] Step S104: Based on the results of the overcurrent signal determination in S101 and the communication status determination in S103, the local power distribution terminal selects the fault handling mode.

[0050] Step S105: When the local distribution terminal detects an overcurrent signal, if communication with the next-level distribution terminal is normal, the fault is handled by slow-motion distributed feeder automation. If communication with the next-level switch fails, the local distribution terminal switches to local reclosing feeder automation for fault handling.

[0051] Step S106: If no overcurrent signal is detected in the local distribution terminal, and communication with the next-level distribution terminal is normal, then the slow-motion distributed feeder automation is used for fault handling. If communication with the next-level distribution terminal fails, the local distribution terminal switches to local reclosing feeder automation for fault handling.

[0052] Even in situations where communication is unstable, this technical solution can accurately detect faults and pinpoint the fault location. It is more adaptable and particularly suitable for the construction and upgrading of feeder automation lines using wireless communication.

[0053] As another optional embodiment:

[0054] The adaptive detection method for short-circuit faults in feeder automation lines of the present invention, combined with Figure 4 The working principle of the slow-motion distributed feeder automated fault section detection is illustrated by the following steps:

[0055] Step S201: After a short circuit fault occurs, the overcurrent protection of the substation outgoing circuit breaker will trip. The distribution automation terminal on the line will detect the line undervoltage and any distribution terminal on the line will determine whether there is an overcurrent signal.

[0056] Step S202: Based on the results of step S201, the local power distribution terminal determines which level of power distribution terminal it will interact with, and determines the fault range based on the data interaction situation.

[0057] Step S203: If the switch of the first distribution terminal is not experiencing overcurrent and cannot communicate with the first switch of the substation, initiate the fault handling procedure for the switch of the first distribution terminal. After the substation outgoing circuit breaker recloses for the first time: The power supply side of the first distribution terminal detects a voltage signal. If the voltage signal disappears within the set time limit X, it can be determined that the fault point is between the substation outgoing circuit breaker and the switch of the first distribution terminal, and the switch of the first distribution terminal will automatically open; if the voltage signal detected by the power supply side of the first distribution terminal does not disappear within the set time limit X, it can be determined that the fault point is not between the substation outgoing circuit breaker and the switch of the first distribution terminal, and the switch of the first distribution terminal remains in the closed position.

[0058] Step S4: Once the reclosing timer ends, the substation outgoing circuit breaker will initiate reclosing to restore power supply to the line upstream of the fault.

[0059] Even in situations where communication is unstable, this technical solution can accurately detect faults and pinpoint the fault location. It is more adaptable and particularly suitable for the construction and upgrading of feeder automation lines using wireless communication.

[0060] As one alternative embodiment:

[0061] The adaptive detection method for short-circuit faults in feeder automation lines of the present invention, combined with Figure 5 The working principle of the local reclosing feeder automated fault section detection is illustrated by the following steps:

[0062] S301. After the outgoing circuit breaker of the substation trips, in the two situations where the switch of the local distribution terminal detects an overcurrent signal and has a communication failure with the switch of the next-level distribution terminal, or in the case where the switch of the local distribution terminal does not detect an overcurrent signal and has a communication failure with the switch of the previous-level distribution terminal, the switch of the local distribution terminal will be de-energized and tripped.

[0063] S302. After the substation outgoing circuit breaker is reclosed once, it supplies power to the switch of the local distribution terminal. The switch of the local distribution terminal detects that there is voltage on the power supply side. If the voltage is lost within the set time limit X, it is determined that the fault point is before the switch of the local distribution terminal. The switch of the local distribution terminal then remains in the open position and is blocked from closing in the reverse direction.

[0064] S303. After the substation outgoing circuit breaker is reclosed once, power is supplied to the switch of the local distribution terminal. The switch of the local distribution terminal detects that there is voltage on the power supply side. After the voltage remains stable and X time limit has passed, the switch of the local distribution terminal automatically closes. If there is a loss of voltage within the set time limit Y, it is determined that the fault point is after the switch of the local distribution terminal. The switch of the local distribution terminal automatically opens and positively blocks the closing.

[0065] S304. After the substation outgoing circuit breaker is reclosed once, power is supplied to the local distribution terminal. The local distribution terminal detects that there is voltage on the power supply side. After the voltage remains stable and X time limit has elapsed, the switch of the local distribution terminal is automatically closed. If there is still voltage within the set time limit Y, it is determined that the fault point is not in the local distribution terminal and is not between the local distribution terminal and the next level distribution terminal.

[0066] Even in situations where communication is unstable, this technical solution can accurately detect faults and pinpoint the fault location. It is more adaptable and particularly suitable for the construction and upgrading of feeder automation lines using wireless communication.

[0067] In this invention, the distribution automation switch can be a load switch or a circuit breaker, and the distribution automation switches can communicate with each other via wireless network or fiber optic communication. The communication protocol can be the DL / T634.5101-2002 balanced protocol or the DL / T634.5104-2002 protocol.

[0068] In this invention, unless otherwise explicitly specified and limited, the "upper level" and "lower level" in the feature that characterize the sequence of switches refer to the switches through which current flows first from the substation outgoing circuit breaker (distribution master station) to each automatic switch (distribution terminal) in the line when the line is normally powered. The switches through which current flows first are the upper level switches, and the switches through which current flows last are the lower level switches.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] Those skilled in the art will recognize that the units of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of the invention.

[0071] In the embodiments provided in this application, it should be understood that the division of units is only a logical functional division. In actual implementation, there may be other division methods, such as multiple units can be combined into one unit, one unit can be split into multiple units, or some features can be ignored.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. An adaptive detection method for short-circuit faults in feeder automation lines, characterized in that, include: When a short-circuit fault occurs on the line, after the outgoing circuit breaker of the substation trips, the local distribution terminal selects the fault handling mode based on the communication status with the upstream and downstream distribution terminals and whether the local distribution terminal has detected an overcurrent signal: When the local distribution terminal detects an overcurrent signal, if communication with the next-level distribution terminal is normal, the slow-motion distributed feeder automation is used for fault handling. If communication with the next-level distribution terminal fails, the local distribution terminal switches to local reclosing feeder automation for fault handling. When no overcurrent signal is detected in the local distribution terminal, if the communication with the upstream distribution terminal is normal, the slow-acting distributed feeder automation is used for fault handling. If the communication with the upstream switch fails, the local distribution terminal switches to local reclosing feeder automation for fault handling. The steps for determining the communication status between adjacent distribution automation terminals are as follows: Record the communication delay T1 between this level power distribution terminal and the upper or lower level power distribution terminal; compare the communication delay T1 with the communication status judgment time parameter T: if T1≥T, then determine that there is a communication fault between this level switch and the upper or lower level power distribution terminal; otherwise, the communication is normal. The steps for detecting and isolating fault sections in the slow-motion distributed feeder automation mode specifically include: After a substation outgoing circuit breaker trips, if the local distribution terminal detects an overcurrent signal, it will query the next-level distribution terminal to see if it has also detected an overcurrent signal. If the next-level switch does not detect an overcurrent signal, the fault point can be determined to be between the local switch and the next-level switch, and the local distribution terminal will automatically trip and lock the closing position. If the next-level distribution terminal also detects an overcurrent signal, the fault point is determined not to be between the local distribution terminal and the next-level distribution terminal, and the local distribution terminal will maintain the switch in the closed position. After a substation outgoing circuit breaker trips, if the local distribution terminal does not detect an overcurrent signal, it will query the upstream distribution terminal to see if it has also detected an overcurrent signal. If the upstream distribution terminal detects an overcurrent signal, it can be determined that the fault point is between the local and upstream distribution terminals, and the switch of the local distribution terminal will automatically open and lock the closing position. If the upstream distribution terminal does not detect an overcurrent signal, it can be determined that the fault point is not between the local and upstream distribution terminals, and the switch of the local distribution terminal will remain in the closed position. The steps for detecting and isolating faulty sections in the local reclosing feeder automation mode specifically include: After the substation outgoing circuit breaker trips, in either of the following two scenarios—where the local distribution terminal detects an overcurrent signal and experiences a communication failure with the next-level distribution terminal, or where the local distribution terminal does not detect an overcurrent signal but experiences a communication failure with the previous-level distribution terminal—the local distribution terminal's switch will trip due to undervoltage. When the substation outgoing circuit breaker recloses: Power is supplied to the local distribution terminal. The local distribution terminal detects that there is voltage on the power supply side. If the voltage is lost within the set time limit X, it is determined that the fault point is before the local distribution terminal. The switch of the local distribution terminal will remain in the open position and be blocked from closing in the reverse direction. When power is supplied to the local distribution terminal, the local distribution terminal detects that there is voltage on the power supply side. After the voltage remains stable and X time limit has elapsed, the switch of the local distribution terminal automatically closes. If there is a voltage loss within the set time limit Y, it is determined that the fault point is after the local distribution terminal, and the switch of the local distribution terminal automatically opens and is positively locked and closed. When power is supplied to the local distribution terminal, the local distribution terminal detects that there is voltage on the power supply side. After the voltage remains stable and a time limit of X has elapsed, the switch of the local distribution terminal automatically closes. If there is still voltage within the set time limit of Y, it is determined that the fault point is not in the local distribution terminal and is not between the local distribution terminal and the next level distribution terminal. The local distribution terminal then takes corresponding actions.

2. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes storing at least one instruction, at least one program, code set, or instruction set, wherein the instruction, program, code set, or instruction set, when executed, controls the device containing the computer-readable storage medium to perform the adaptive detection method for feeder automation line short-circuit faults as described in claim 1.

3. An adaptive detection device for short-circuit faults in feeder automation lines, characterized in that, The method includes a processor, a memory, and at least one instruction, at least one program, code set, or instruction set stored in the memory and configured to be executed by the processor. When the processor executes the instruction, the program, the code set, or the instruction set, it implements the adaptive detection method for short-circuit faults in feeder automation lines as described in claim 1.

4. An adaptive detection device for short-circuit faults in feeder automation lines, characterized in that, This device is used to implement the adaptive detection method for short-circuit faults in feeder automation lines as described in claim 1, comprising: The first unit is used to detect whether there is an overcurrent signal in the power distribution terminal at this level; The second unit is used to select and obtain the communication status between the current distribution terminal and the upper or lower level distribution terminal based on the detection result of the overcurrent signal. The third unit is used to switch the feeder automation mode of the distribution network based on the obtained communication status.

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