Power distribution network recovery method, feeder protection device, power distribution network, medium and product

Abstract

The invention discloses a power distribution network recovery method, a feeder protection device, a power distribution network, a medium and a product, and relates to the technical field of power distribution networks, and the disclosed power distribution network recovery method comprises the following steps: after at least one target feeder protection device which detects a fault of the power distribution network carries out primary tripping, reclosing is carried out in sequence according to a preset time interval; after the target feeder protection device is reclosed, if the target feeder protection device does not detect a power distribution network fault within a preset duration less than a preset time interval, the fault point is not in a power distribution line interval corresponding to the target feeder protection device, and the target feeder protection device enters a tripping locking state at the moment. The target feeder protection device is connected to the power distribution network without secondary tripping, so that the target feeder protection device not at the fault point can be recovered from the fault of the power distribution network only through primary tripping and closing in the recovery process of the power distribution network, and the technical problem of how to reduce the fault recovery time of the power distribution network is solved.

Description

Technical Field

[0001] The present application relates to the technical field of distribution network, and in particular to a distribution network restoration method, a feeder protection device, a distribution network, a medium and a product. Background Art

[0002] After a distribution network fault occurs, the feeder protection device in the distribution network can trip and close according to its own protection logic to isolate the fault from the distribution network and restore the power supply of the distribution network. However, during the distribution network restoration process, the feeder protection device that detects the fault needs to trip and close twice, which will result in a longer fault recovery time for the distribution network. Summary of the invention

[0003] The main purpose of this application is to provide a distribution network restoration method, a feeder protection device, a distribution network, a medium and a product, aiming to solve the technical problem of how to reduce the fault recovery time of the distribution network.

[0004] To achieve the above objectives, the present application proposes a distribution network restoration method, which is applied to multiple feeder protection devices in the distribution network. The distribution network restoration method includes:

[0005] By at least one target feeder protection device, in the case of detecting a distribution network fault, after a trip is performed, reclosing is performed in sequence according to the respective corresponding preset closing delays, wherein the target feeder protection device includes an in-station feeder protection device in the substation and an out-station feeder protection device between the fault point where the distribution network fault is located and the substation, the closing delay difference between any two adjacent feeder protection devices is a preset time interval, and a first preset closing delay of a first feeder protection device closer to the substation is less than a second preset closing delay of a second feeder protection device farther from the substation;

[0006] Through each target feeder protection device, when no distribution network fault is detected within a preset time after the reclosing moment, a tripping lockout state is entered to restore the target feeder protection device to access the distribution network, wherein the preset time is less than the preset time interval.

[0007] In one embodiment, after the step of entering a trip lockout state by each target feeder protection device when no distribution network fault is detected within a preset time after the reclosing moment, the distribution network recovery method further includes:

[0008] Through each target feeder protection device, the trip lockout state is cut out after a preset lockout reset time after the trip lockout moment.

[0009] In one embodiment, after at least one target feeder protection device performs a trip once and then sequentially performs reclosing according to respective corresponding preset closing delays when a distribution network fault is detected, the distribution network recovery method further includes:

[0010] Through each target feeder protection device, when a distribution network fault is detected within a preset time after the reclosing moment, a secondary trip is performed and the reclosing lock state is entered to isolate the fault point corresponding to the target feeder protection device from the distribution network.

[0011] In one embodiment, after the step of performing a secondary trip and entering a reclosing lock state by each target feeder protection device when a distribution network fault is detected within a preset time after the reclosing moment, the distribution network recovery method further includes:

[0012] After entering the reclosing lockout state through each target feeder protection device, the reclosing lockout state is cut out when the fault is eliminated.

[0013] In one embodiment, when a distribution network fault is detected, the target feeder protection device performs a tripping operation after delaying a preset tripping delay.

[0014] In one embodiment, the feeder protection device detects a distribution network fault by detecting a current or a voltage of the distribution line where the feeder protection device is located.

[0015] In addition, to achieve the above objectives, the present application also proposes a feeder protection device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the distribution network restoration method as described above.

[0016] In addition, to achieve the above purpose, the present application also proposes a distribution network, the distribution network comprising:

[0017] A plurality of feeder protection devices as described above.

[0018] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the distribution network recovery method as described above are implemented.

[0019] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the distribution network restoration method as described above are implemented.

[0020] One or more technical solutions proposed in this application have at least the following technical effects:

[0021] The present application provides a distribution network recovery method, a feeder protection device, a distribution network, a medium and a product. At least one target feeder protection device that detects a distribution network fault performs a trip once and then performs reclosing in sequence according to a preset time interval. After the target feeder protection device recloses, if the target feeder protection device does not detect the distribution network fault within a preset time length that is less than the preset time interval, it means that the fault point is not within the distribution line interval corresponding to the target feeder protection device. At this time, the target feeder protection device enters a tripping lockout state and will not perform a secondary trip. The target feeder protection device is directly restored to access the distribution network, so that during the distribution network recovery process, the target feeder protection device that is not at the fault point only needs to perform a trip and a closing once to recover from the distribution network fault. Compared with performing a trip and a closing twice, the time for the secondary trip and the closing of the target feeder protection device is reduced, and the technical problem of how to reduce the fault recovery time of the distribution network is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of an exemplary distribution network model in the distribution network of this application;

[0025] Figure 2 This is a flow chart of the first embodiment of the power distribution network restoration method of the present application;

[0026] Figure 3 It is a schematic diagram of the device structure of the hardware operating environment involved in the distribution network recovery method in the embodiment of the present application.

[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0029] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0030] The main solution of the embodiment of the present application is: applied to multiple feeder protection devices in a distribution network, and the distribution network recovery method includes: through at least one target feeder protection device, when a distribution network fault is detected, after a trip is performed, reclosing is performed in sequence according to the respective corresponding preset closing delays, wherein the target feeder protection device includes an in-station feeder protection device in the substation and an out-station feeder protection device between the fault point where the distribution network fault is located and the substation, the closing delay difference between any two adjacent feeder protection devices is a preset time interval, and the first preset closing delay of the first feeder protection device closer to the substation is less than the second preset closing delay of the second feeder protection device farther from the substation; through each target feeder protection device, when no distribution network fault is detected within a preset time length after the reclosing moment, a tripping lockout state is entered to restore the target feeder protection device to access the distribution network, wherein the preset time length is less than the preset time interval.

[0031] like Figure 1 As shown, in the related art, a distribution line of the distribution network is provided with feeder protection devices F00-F06, the feeder protection device F00 is an in-station feeder protection device in the substation, and the feeder protection devices F01-F06 are out-station feeder protection devices outside the substation. If the tripping delay of the feeder protection devices F00-F06 is set to 0.3s, the preset closing delays are 10s, 20s, 30s, 40s, 50s, 60s and 70s, and the reclosing lock time after the secondary trip is 5s. When a fault occurs at point K, feeder protection devices F00~F04 can all detect the fault, and after a 0.3s delay, they all trip once, and then reclose once in sequence according to the preset closing delay; thereafter, since the fault point K is within the interval corresponding to F04, after F04 is closed, feeder protection devices F00~F04 detect the fault again, and feeder protection devices F00~F04, after a 0.3s delay, all trip for the second time; after feeder protection devices F00~F04 trip successfully, feeder protection devices F00~F04 reclose for the second time in sequence according to the preset closing delay, and since F04 trips for the second time within the reclosing lockout time, the F04 second reclosing is locked and no longer closes, and the fault point K is successfully isolated, and the power supply of feeder protection devices F00~F03 is restored. During the entire distribution network restoration process, the restoration time of feeder protection devices F00~F03 are 60.6s, 70.6s, 80.6s and 90.6s respectively. It can be seen that how to reduce the fault restoration time of the distribution network needs to be solved urgently.

[0032] Therefore, the present application provides a solution, by detecting at least one target feeder protection device that has a distribution network fault, tripping once, and then reclosing in sequence according to a preset time interval. After the target feeder protection device recloses, if the target feeder protection device has not detected the distribution network fault within a preset time length that is less than the preset time interval, it means that the fault point is not within the distribution line interval corresponding to the target feeder protection device. At this time, the target feeder protection device enters a tripping lockout state and will not trip a second time. The target feeder protection device is directly restored to the distribution network, so that during the distribution network recovery process, the target feeder protection device that is not at the fault point only needs to trip and close once to recover from the distribution network fault. Compared with tripping and closing twice, the time for the secondary tripping and closing of the target feeder protection device is reduced, thereby solving the technical problem of how to reduce the fault recovery time of the distribution network.

[0033] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a feeder protection device, etc. The following takes the feeder protection device as an example to illustrate this embodiment and the following embodiments.

[0034] First, an embodiment of the present application provides a power distribution network, which may include:

[0035] A plurality of feeder protection devices as described above.

[0036] It should be noted that the distribution network may include at least one distribution line, and a plurality of feeder protection devices may be arranged on one distribution line. Figure 1 As shown, multiple feeder protection devices can be connected in series on the distribution line. The distribution line can also include a main line and a branch line, and multiple feeder protection devices can be connected in series on the main line and the branch line.

[0037] It is understandable that on a distribution line, each feeder protection device can detect a distribution network fault on the distribution line, and when a distribution network fault is detected, the power terminals in the corresponding distribution line interval are cut off from the distribution line. Figure 1 As shown, the feeder protection device F01 can cut off the power terminals in the distribution line interval between the feeder protection device F01 and the feeder protection device F02 from the distribution line when a distribution network fault is detected. Specifically, in the following embodiments, the feeder protection device can implement the distribution network recovery method provided in the embodiments of the present application.

[0038] Based on this, the embodiment of the present application provides a distribution network recovery method, referring to Figure 2 , Figure 2 This is a flow chart of the first embodiment of the power distribution network restoration method of the present application.

[0039] In this embodiment, the distribution network recovery method may include steps S100 to S200:

[0040] Step S100: When a distribution network fault is detected, at least one target feeder protection device performs a trip and then performs reclosing in sequence according to the corresponding preset closing delays.

[0041] Among them, the target feeder protection device includes an in-station feeder protection device in the substation and an out-station feeder protection device between the fault point where the distribution network fault is located and the substation. The closing delay difference between any two adjacent feeder protection devices is a preset time interval, and the first preset closing delay of the first feeder protection device closer to the substation is less than the second preset closing delay of the second feeder protection device farther from the substation.

[0042] It should be noted that the target feeder protection device is a feeder protection device that detects a distribution network fault in the distribution network among the multiple feeder protection devices. Figure 1 As shown, if a distribution network fault occurs at point K, the feeder protection devices F00-F04 can all detect the distribution network fault. At this time, the feeder protection devices F00-F04 are all target feeder protection devices.

[0043] In this embodiment, the feeder protection device can detect distribution network faults by detecting the current or voltage of the distribution line where it is located.

[0044] It should be noted that the feeder protection device can detect whether a distribution network fault occurs in the distribution line where it is located by checking whether the detected current or voltage meets the conditions. Figure 1 As shown, taking overcurrent as an example, if a distribution network fault occurs at point K, feeder protection devices F00~F04 can detect the overcurrent situation, thereby determining that a distribution network fault occurs and performing a trip.

[0045] It can be understood that when each target feeder protection device detects a distribution network fault, it trips once and then recloses in sequence according to its corresponding preset closing delay. During the reclosing process, the power terminals within the corresponding distribution line interval are isolated or restored from the distribution network according to their respective protection logic. For each distribution line, each feeder protection device on the distribution line is pre-set with its own preset closing delay. The closing order of each feeder protection device can be determined based on the distance between the feeder protection device and the substation, so that the preset closing delay of each feeder protection device can be determined based on the preset time interval combined with the distance from the substation, wherein the preset time interval can be determined based on the actual fault recovery requirements of the distribution network. Figure 1As shown, if the preset time interval is configured as 10s, the preset closing delays of the feeder protection devices F00-F04 can be 0s, 10s, 20s, 30s and 40s respectively.

[0046] Step S200, when no distribution network fault is detected within a preset time after the reclosing moment, each target feeder protection device enters a tripping lockout state to restore the target feeder protection device to access the distribution network.

[0047] The preset duration is shorter than the preset time interval.

[0048] It should be noted that a constant 1 may be pre-set in the protection logic of the feeder protection device: [Control word: reclosing successfully, lockout]. For any target feeder protection device, since each target feeder protection device performs reclosing in sequence at preset time intervals, and the preset time length is less than the preset time interval, when the distribution network fault is not within the distribution line interval corresponding to any target feeder protection device, after any target feeder protection device recloses, since the target feeder protection device corresponding to the distribution line interval where the fault point is located has not yet reclosed, any target feeder protection device cannot detect the distribution network fault within the preset time length, so that any target feeder protection device can determine that the distribution network fault is not within the distribution line interval corresponding to any target feeder protection device, recloses successfully, enters the tripping lockout state, and no longer performs the tripping operation, restoring any target feeder protection device to access the distribution network. Figure 1 As shown, if the preset time interval is configured as 10s, the preset duration can be configured as 5s.

[0049] In a feasible implementation manner, after step S100, the distribution network restoration method may further include step S300:

[0050] Step S300, when a distribution network fault is detected within a preset time after the reclosing moment by each target feeder protection device, a secondary trip is performed and the reclosing lock state is entered to isolate the fault point corresponding to the target feeder protection device from the distribution network.

[0051] It should be noted that, for any target feeder protection device, when the distribution network fault is within the distribution line interval corresponding to any target feeder protection device, after any target feeder protection device recloses, any target feeder protection device can detect the distribution network fault, so that any target feeder protection device can determine that the distribution network fault is within the distribution line interval corresponding to any target feeder protection device, perform secondary tripping, isolate the corresponding fault point from the distribution network, and enter the reclosing locked state, and no longer perform the closing operation, so as to successfully isolate the fault point from the distribution network.

[0052] In this embodiment, when the target feeder protection device detects a distribution network fault, it performs a tripping operation after delaying a preset tripping delay.

[0053] It is understandable that when the target feeder protection device detects a distribution network fault, a certain preset tripping delay is required to perform a tripping operation, and the preset tripping delay can be determined according to the hardware conditions of the feeder protection device.

[0054] In one example, if Figure 1 As shown, if the preset tripping delay is 0.3s, the preset time interval is configured as 10s, the preset duration is 5s, and the preset closing delays of the feeder protection devices F00~F04 correspond to 10s, 20s, 30s, 40s and 50s respectively. Taking overcurrent fault as an example, when a distribution network fault occurs at point K, feeder protection devices F00~F04 can detect the fault current. After a 0.3s delay, feeder protection devices F00~F04 trip once to remove the fault. After the feeder protection devices F00~F04 trip successfully, they reclose in sequence. During the reclosing process, feeder protection devices F00~F03 will not detect the fault current within 5s after the reclosing moment, and feeder protection devices F00~F03 will enter the tripping lock state and no longer perform the tripping operation. After the feeder protection device F04 detects the fault current immediately after reclosing, the feeder protection device F04 will trip twice and enter the reclosing lock state and no longer reclose. In this way, the distribution network fault at point K is isolated, and the power supply of the distribution line interval corresponding to the feeder protection devices F00~F03 is restored. It can be seen that the power supply recovery time of the feeder protection devices F00~F03 in this embodiment is 10.3s, 20.3s, 30.3s and 40.3s respectively, compared with the recovery time of the above-mentioned feeder protection devices F00~F03 being 60.6s, 70.6s, 80.6s and 90.6s respectively, which greatly reduces the fault recovery time of the distribution network.

[0055] In a feasible implementation manner, after step S200, the distribution network recovery method may further include:

[0056] Through each target feeder protection device, the trip lockout state is cut out after a preset lockout reset time after the trip lockout moment.

[0057] It should be noted that after the target feeder protection device enters the tripping lockout state, in order to ensure that the target feeder protection device can take measures for the next distribution network fault, the target feeder protection device needs to switch out of the tripping lockout state after the distribution network is restored.

[0058] In specific implementation, the protection logic of the feeder protection device can be pre-set with a fixed value 2: [Delay: Lockout reset time], where the lockout reset time is the preset lockout reset time, so that the target feeder protection device, after entering the trip lockout state, can be switched out of the trip lockout state after the preset lockout reset time after the trip lockout moment. In an example, [Control word: Reclosing successful lockout] = 1, [Delay: Lockout reset time] = 200s can be set respectively.

[0059] In a feasible implementation manner, after step S300, the distribution network restoration method may further include:

[0060] After entering the reclosing lockout state through each target feeder protection device, the reclosing lockout state is cut out when the fault is eliminated.

[0061] It should be noted that after the target feeder protection device enters the reclosing lock state, if the distribution network fault is eliminated, in order to ensure that the target feeder protection device can take measures for the next distribution network fault, the target feeder protection device can switch out of the reclosing lock state after the fault is eliminated. Among them, after the target feeder protection device enters the reclosing lock state, it can determine that the fault is eliminated according to the user instruction.

[0062] Therefore, the present embodiment provides a distribution network recovery method, which detects at least one target feeder protection device of a distribution network fault, trips once, and then recloses in sequence according to a preset time interval. After the target feeder protection device recloses, if the target feeder protection device does not detect the distribution network fault within a preset time length less than the preset time interval, it means that the fault point is not within the distribution line interval corresponding to the target feeder protection device. At this time, the target feeder protection device enters a tripping lockout state and will not trip a second time. The target feeder protection device is directly restored to access the distribution network, so that during the distribution network recovery process, the target feeder protection device that is not at the fault point only needs to trip and close once to recover from the distribution network fault. Compared with tripping and closing twice, the time for the secondary tripping and closing of the target feeder protection device is reduced, and the technical problem of how to reduce the fault recovery time of the distribution network is solved.

[0063] Moreover, this embodiment only optimizes the protection logic of the feeder protection device and does not require additional hardware investment. Compared with the method of using the principle of optical fiber longitudinal difference or 5G optical difference to achieve distribution network recovery, it saves hardware costs and is more suitable for large-scale promotion.

[0064] The present application provides a feeder protection device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the distribution network restoration method in the above-mentioned embodiment one.

[0065] Reference below Figure 3 , which shows a schematic diagram of the structure of a feeder protection device suitable for implementing the embodiment of the present application. The feeder protection device in the embodiment of the present application may include but is not limited to mobile terminals such as laptop computers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), etc., and fixed terminals such as desktop computers, etc. Figure 3 The feeder protection device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0066] like Figure 3 As shown, the feeder protection device may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the feeder protection device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the feeder protection device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a feeder protection device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or provided instead.

[0067] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0068] The feeder protection device provided by the present application adopts the distribution network recovery method in the above embodiment, which can solve the technical problem of how to reduce the fault recovery time of the distribution network. Compared with the related art, the beneficial effects of the feeder protection device provided by the present application are the same as the beneficial effects of the distribution network recovery method provided by the above embodiment, and the other technical features in the feeder protection device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0069] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0070] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0071] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the distribution network restoration method in the above-mentioned embodiment.

[0072] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0073] The computer-readable storage medium may be included in the feeder protection device; or may exist independently without being assembled into the feeder protection device.

[0074] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the feeder protection device, the feeder protection device: through at least one target feeder protection device, in the case of detecting a distribution network fault, after performing a trip, reclosing in sequence according to the respective corresponding preset closing delays, wherein the target feeder protection device includes an in-station feeder protection device in the substation and an out-station feeder protection device between the fault point where the distribution network fault is located and the substation, the closing delay difference between any two adjacent feeder protection devices is a preset time interval, and the first preset closing delay of the first feeder protection device closer to the substation is less than the second preset closing delay of the second feeder protection device farther from the substation; for each target feeder protection device, through the target feeder protection device, if no distribution network fault is detected within a preset time length after the reclosing moment, the target feeder protection device enters a tripping lockout state to restore the target feeder protection device to access the distribution network, wherein the preset time length is less than the preset time interval.

[0075] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0076] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0077] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0078] The readable storage medium provided in this application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned distribution network recovery method, and can solve the technical problem of how to reduce the fault recovery time of the distribution network. Compared with the related art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the distribution network recovery method provided in the above-mentioned embodiment, and will not be repeated here.

[0079] The present application also provides a computer program product, including a computer program, which implements the steps of the distribution network restoration method as described above when executed by a processor.

[0080] The computer program product provided in this application can solve the technical problem of how to reduce the fault recovery time of the distribution network. Compared with the related art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the distribution network recovery method provided in the above embodiment, which will not be repeated here.

[0081] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A distribution network restoration method, characterized in that: Applied to multiple feeder protection devices in a distribution network, the distribution network restoration method comprises: By at least one target feeder protection device, in the case of detecting a distribution network fault, after a trip is performed, reclosing is performed in sequence according to the respective corresponding preset closing delays, wherein the target feeder protection device includes an in-station feeder protection device in the substation and an out-station feeder protection device between the fault point where the distribution network fault is located and the substation, the closing delay difference between any two adjacent feeder protection devices is a preset time interval, and a first preset closing delay of a first feeder protection device closer to the substation is less than a second preset closing delay of a second feeder protection device farther from the substation; Through each of the target feeder protection devices, when the distribution network fault is not detected within a preset time after the reclosing moment, a tripping lockout state is entered to restore the target feeder protection device to access the distribution network, wherein the preset time is less than the preset time interval.

2. The method for restoring a power distribution network according to claim 1, characterized in that: After the step of entering a trip lockout state when the target feeder protection devices fail to detect the distribution network fault within a preset time after the reclosing moment, the distribution network recovery method further includes: Through each of the target feeder protection devices, the trip lockout state is switched out after a preset lockout reset time after the trip lockout moment.

3. The method for restoring a power distribution network according to claim 1, characterized in that: After the step of performing a trip once and then sequentially reclosing according to respective corresponding preset closing delays by at least one target feeder protection device when a distribution network fault is detected, the distribution network recovery method further comprises: When the distribution network fault is detected within the preset time after the reclosing moment by each of the target feeder protection devices, a secondary trip is performed and the reclosing lock state is entered to isolate the fault point corresponding to the target feeder protection device from the distribution network.

4. The method for restoring a power distribution network according to claim 3, characterized in that: After the step of performing secondary tripping and entering a reclosing lock state when the distribution network fault is detected by each of the target feeder protection devices within the preset time after the reclosing moment, the distribution network recovery method further includes: After entering the reclosing lock state through each of the target feeder protection devices, the reclosing lock state is switched out when the fault is eliminated.

5. The distribution network restoration method according to any one of claims 1 to 4, characterized in that: When the target feeder protection device detects a fault in the distribution network, it performs a tripping operation after delaying a preset tripping delay.

6. The distribution network restoration method according to any one of claims 1 to 4, characterized in that: The feeder protection device detects the distribution network fault by detecting the current or voltage of the distribution line where it is located.

7. A feeder protection device, characterized in that: The feeder protection device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the distribution network restoration method according to any one of claims 1 to 6.

8. A distribution network, characterized in that: The power distribution network comprises: A plurality of feeder protection devices as claimed in claim 7.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the distribution network restoration method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the power distribution network restoration method according to any one of claims 1 to 6 are implemented.

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