Fault location method and system using single-line direct supply of traction network rail current

Abstract

The present disclosure relates to the technical field of traction power supply for electrified railways, and provides a fault distance measurement method and system using a single-line direct supply of traction network rail current. The method comprises: when the current detected at the first end of the target rail is greater than a preset current threshold, obtaining a first current, a first voltage, a second voltage, a first impedance, a second impedance, and a target mutual impedance; and calculating the short-circuit fault distance between the target contact line and the target rail based on the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance, and a preset calculation formula. The embodiment of the present disclosure can eliminate the need to consider the problem of poor accuracy caused by grounding with a large transition resistance, thereby increasing the practicality and calculation accuracy of the present disclosure.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electrified railway traction power supply, and in particular to a fault location method and system for directly supplying traction network rail current using a single line. Background Art

[0002] Direct-supply electric and gasified railways generally use the single-ended reactance method for distance measurement. This method has large calculation errors when there is a large transition resistance grounding, which affects the location and repair of the fault. Summary of the Invention

[0003] In view of this, the embodiments of the present disclosure provide a fault ranging method and system using a single-line direct supply of traction network rail current to solve the problem in the prior art that the calculation error is large when there is a large transition resistance grounding, which affects the location and repair after the fault.

[0004] A first aspect of the embodiments of the present disclosure provides a fault location method using a single-line direct supply of traction network rail current, comprising:

[0005] When the current detected at the first end of the target rail is greater than a preset current threshold, obtaining a first current at the first end of the target contact wire corresponding to the target rail, a first voltage representing a potential difference between the first end of the target contact wire and the first end of the target rail, a second voltage representing a potential difference between the second end of the target contact wire and the second end of the target rail, a first impedance representing an impedance per kilometer of the target contact wire, a second impedance representing an impedance per kilometer of the target rail, and a target mutual impedance representing a mutual impedance per kilometer between the target contact wire and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact wire;

[0006] The short-circuit fault distance between the target contact line and the target rail is calculated according to the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance, and a preset calculation formula, wherein the calculation formula is:

[0007]

[0008] Wherein, y represents the short-circuit fault distance, represents the first voltage, represents the first current, represents the second voltage, represents the first impedance, represents the second impedance, represents the target mutual impedance.

[0009] In some embodiments, the current threshold is 500 amps.

[0010] In some embodiments, the first end and the second end of the target rail represent the starting end and the ending end of the target rail respectively, and the first end and the second end of the target contact line represent the starting end and the ending end of the target contact line respectively.

[0011] A second aspect of the embodiments of the present disclosure provides a fault location system for directly supplying traction network rail current using a single line, comprising:

[0012] an acquisition module, configured to, when the current detected at the first end of the target rail is greater than a preset current threshold, acquire a first current at a first end of a target contact wire corresponding to the target rail, a first voltage representing a potential difference between the first end of the target contact wire and the first end of the target rail, a second voltage representing a potential difference between the second end of the target contact wire and the second end of the target rail, a first impedance representing an impedance per kilometer of the target contact wire, a second impedance representing an impedance per kilometer of the target rail, and a target mutual impedance representing a mutual impedance per kilometer between the target contact wire and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact wire;

[0013] a calculation module, configured to calculate a short-circuit fault distance between the target contact line and the target rail based on the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance, and a preset calculation formula, wherein the calculation formula is:

[0014]

[0015] Wherein, y represents the short-circuit fault distance, represents the first voltage, represents the first current, represents the second voltage, represents the first impedance, represents the second impedance, represents the target mutual impedance.

[0016] In some embodiments, the current threshold is 500 amps.

[0017] In some embodiments, the first end and the second end of the target rail represent the starting end and the ending end of the target rail respectively, and the first end and the second end of the target contact line represent the starting end and the ending end of the target contact line respectively.

[0018] According to a third aspect of an embodiment of the present disclosure, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0019] A third aspect of the embodiments of the present disclosure provides a fault distance measurement system for a traction network rail current using a single-line direct supply, comprising a first voltage transformer, a first current transformer, a second voltage transformer, a collection device, a distance measurement device, and a data transmission path, wherein:

[0020] The first end of the first voltage transformer is connected to the first end of the target contact wire, and is used to measure a first voltage between the first end of the target contact wire and the first end of the target rail, and transmit the first voltage to the distance measuring device;

[0021] A first end of the first current transformer is connected to a first end of the target contact wire, and is used to measure a first current at the first end of the target contact wire and transmit the first current to the distance measuring device;

[0022] A first end of the second voltage transformer is connected to the second end of the target contact wire, and is used to measure a second voltage between the second end of the target contact wire and the second end of the target rail, and transmit the second voltage to the distance measuring device;

[0023] The first end of the acquisition device is connected to the second section of the second voltage transformer, and the second end is connected to the second end of the data transmission path, for receiving the second voltage and transmitting the second voltage to the distance measuring device through the data transmission path;

[0024] The first end of the distance measuring device is connected to the second end of the first voltage transformer, the second end is connected to the second end of the first current transformer, and the third end is connected to the first end of the data transmission path. The steps of the above method are implemented when the distance measuring device is in operation.

[0025] In some embodiments, the data transmission path is a fiber channel.

[0026] In some embodiments, the system further comprises a central computing device, wherein the central computing device is connected to the second end of the acquisition device and the third end of the distance measuring device respectively;

[0027] The distance measuring device is further used to transmit the first current and the first voltage to the acquisition device, and the acquisition device is further used to implement the steps of the above method when running;

[0028] The central computing device is used to simultaneously receive the first short-circuit fault distance calculated by the distance measuring device and the second short-circuit fault distance calculated by the acquisition device, and to issue an alarm when the difference between the first short-circuit fault distance and the second short-circuit fault distance is greater than a preset first threshold.

[0029] According to a fourth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, which stores a computer program. When the computer program is executed by a processor, the steps of the above method are implemented.

[0030] According to a fifth aspect of the embodiments of the present disclosure, a computer program product is provided. The computer program product includes a computer program or instructions, and the steps of the above method are implemented when the computer program or instructions are executed by a processor.

[0031] Compared with the prior art, the beneficial effects of the embodiments of the present disclosure include at least: by obtaining a first current at the first end of the target contact line corresponding to the target rail, a first voltage representing the potential difference between the first end of the target contact line and the first end of the target rail, a second voltage representing the potential difference between the second end of the target contact line and the second end of the target rail, a first impedance representing the impedance per kilometer of the target contact line, a second impedance representing the impedance per kilometer of the target rail, and a target mutual impedance representing the mutual impedance per kilometer between the target contact line and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact line; according to the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance and a preset calculation formula, the short-circuit fault distance between the target contact line and the target rail is calculated, without considering the problem of poor accuracy caused by grounding with a large transition resistance, thereby increasing the practicality and calculation accuracy of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 This is a schematic diagram of an application scenario of a fault location method using a single-line direct supply of traction network rail current provided by an embodiment of the present disclosure;

[0034] Figure 2 This is a flowchart of some embodiments of a fault location method using a single-line direct supply traction network rail current provided by an embodiment of the present disclosure;

[0035] Figure 3 This is a simple structural diagram of some embodiments of a fault location system using a single-line direct supply of traction network rail current provided by an embodiment of the present disclosure;

[0036] Figure 4This is a simplified structural diagram of a fault distance measurement system using a single-line direct supply of traction network rail current according to an embodiment of the present disclosure;

[0037] Figure 5 is a schematic diagram of an electronic device provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0039] It should also be noted that, for ease of description, only the parts related to the present disclosure are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0040] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are only used to distinguish different systems, devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these systems, devices, modules or units.

[0041] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0042] The names of the messages or information exchanged between multiple systems in the embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0043] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0044] Figure 1 It is a schematic diagram of an application scenario of a fault location method using a single-line direct supply of traction network rail current according to some embodiments of the present disclosure.

[0045] exist Figure 1In an application scenario, first, when the current detected at the first end of the target rail is greater than a preset current threshold, the computing device 101 can obtain a first current 102 at the first end of the target contact wire corresponding to the target rail, a first voltage 103 representing a potential difference between the first end of the target contact wire and the first end of the target rail, a second voltage 104 representing a potential difference between the second end of the target contact wire and the second end of the target rail, a first impedance 105 representing an impedance per kilometer of the target contact wire, a second impedance 106 representing an impedance per kilometer of the target rail, and a target mutual impedance 107 representing a mutual impedance per kilometer between the target contact wire and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact wire;

[0046] Secondly, the computing device 101 can calculate the short-circuit fault distance 109 between the target contact line and the target rail based on the first current 102, the first voltage 103, the second voltage 104, the first impedance 105, the second impedance 106, the target mutual impedance 107 and the preset calculation formula 108.

[0047] It should be noted that the computing device 101 can be either hardware or software. When the computing device is hardware, it can be implemented as a distributed cluster consisting of multiple servers or terminal devices, or as a single server or a single terminal device. When the computing device is software, it can be installed in the hardware devices listed above. It can be implemented as multiple software or software modules for providing distributed services, or as a single software or software module. No specific limitations are given here.

[0048] It should be understood that Figure 1 The number of computing devices in the embodiment is merely illustrative. Any number of computing devices may be provided according to implementation requirements.

[0049] Continue to refer Figure 2 , shows a process 200 of some embodiments of the fault location method using a single-line direct supply traction network rail current according to the present disclosure. The method can be Figure 1 The method for fault location using a single-line direct supply traction network rail current comprises the following steps:

[0050] Step 201, when the current detected at the first end of the target rail is greater than a preset current threshold, obtain a first current of the first end of the target contact wire corresponding to the target rail, a first voltage representing the potential difference between the first end of the target contact wire and the first end of the target rail, a second voltage representing the potential difference between the second end of the target contact wire and the second end of the target rail, a first impedance representing the impedance per kilometer of the target contact wire, a second impedance representing the impedance per kilometer of the target rail, and a target mutual impedance representing the mutual impedance per kilometer between the target contact wire and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact wire.

[0051] In some embodiments, the execution subject of the fault location method using a single-line direct supply traction network rail current (such as Figure 1 The computing device 101 shown) can be connected to the target device via a wired connection or a wireless connection, and then, when the current detected at the first end of the target rail is greater than a preset current threshold, a first current of the first end of the target contact line corresponding to the target rail is obtained, a first voltage representing the potential difference between the first end of the target contact line and the first end of the target rail, a second voltage representing the potential difference between the second end of the target contact line and the second end of the target rail, a first impedance representing the impedance per kilometer of the target contact line, a second impedance representing the impedance per kilometer of the target rail, and a target mutual impedance representing the mutual impedance per kilometer between the target contact line and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact line.

[0052] The target rail can refer to a certain section of rail used for detection. The target contact line can refer to a certain section of contact line corresponding to the target rail. It should be noted that the first end of the target rail can be the rail between two stations, the rail between two measurement points, or the rail between a station and a measurement point. The contact line is similar to it and will not be described in detail. Please refer to Figure 3 , the target rail and the target contact line are parallel and completely corresponding, that is, the first end of the target rail corresponds to the first end of the target contact line, the second end of the target rail corresponds to the second end of the target contact line, and the middle part of the target rail also corresponds to the middle part of the target contact line.

[0053] Therefore, in some optional implementations, the first end and the second end of the target rail represent the starting end and the ending end of the target rail, respectively, and the first end and the second end of the target contact line represent the starting end and the ending end of the target contact line, respectively. The starting end may refer to the starting end point of the rail / contact line set at a certain station, and the ending end may refer to the ending end point of the rail / contact line set at another station, that is, the target rail / contact line is set between two stations.

[0054] The current threshold may refer to a pre-set current limit value used to determine whether the contact wire of a single-line employee traction network is short-circuited with the rail. Since a short circuit occurs between the contact wire and the rail, the magnitude of the transmitted current increases rapidly. Therefore, when a rapid increase in current is detected, it can be determined that a short circuit has occurred. The current threshold may be a fixed value or a percentage value. For example, the current threshold may be a fixed value of 500 amps, that is, when the current passing through the target rail exceeds 500 amps, a short circuit is determined to have occurred. Alternatively, the current threshold may be 150% of the current current value, that is, when the current exceeds 150% of the current current, a short circuit is determined to have occurred. The above 500 amps or 150% are examples, and the specific values ​​need to be calculated or confirmed based on actual conditions, and are not specifically limited. In addition, the short circuit may refer to common short circuits such as metallic short circuits or high-resistance short circuits.

[0055] It should be noted that the above-mentioned wireless connection methods may include but are not limited to 3G / 4G / 5G connection, WiFi connection, Bluetooth connection, WiMAX connection, Zigbee connection, UWB (ultra wideband) connection, and other wireless connection methods currently known or to be developed in the future.

[0056] Step 202: Calculate the short-circuit fault distance between the target contact line and the target rail based on the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance, and a preset calculation formula, wherein the calculation formula is:

[0057]

[0058] Wherein, y represents the short-circuit fault distance, represents the first voltage, represents the first current, represents the second voltage, represents the first impedance, represents the second impedance, In some embodiments, the execution entity may calculate the short-circuit fault distance between the target contact line and the target rail based on the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance, and a preset calculation formula, wherein the calculation formula is:

[0059]

[0060] Wherein, y represents the short-circuit fault distance, represents the first voltage, represents the first current, represents the second voltage, represents the first impedance, represents the second impedance, represents the target mutual impedance.

[0061] The beneficial effects of one of the above-mentioned embodiments of the present disclosure include at least: by obtaining a first current at the first end of the target contact line corresponding to the target rail, a first voltage representing the potential difference between the first end of the target contact line and the first end of the target rail, a second voltage representing the potential difference between the second end of the target contact line and the second end of the target rail, a first impedance representing the impedance per kilometer of the target contact line, a second impedance representing the impedance per kilometer of the target rail, and a target mutual impedance representing the mutual impedance per kilometer between the target contact line and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact line; calculating the short-circuit fault distance between the target contact line and the target rail based on the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance and a preset calculation formula, there is no need to consider the problem of poor accuracy caused by grounding with a large transition resistance, thereby increasing the practicality and calculation accuracy of the present disclosure.

[0062] The following are embodiments of the apparatus disclosed herein, which can be used to implement the method embodiments disclosed herein. For details not disclosed in the apparatus embodiments disclosed herein, please refer to the method embodiments disclosed herein.

[0063] Further references Figure 4 As an implementation of the above methods in the above figures, the present disclosure provides some embodiments of a fault distance measurement device using a single-line direct supply of traction network rail current. These device embodiments are similar to Figure 2 The above method embodiments correspond to each other.

[0064] like Figure 4 As shown, in some embodiments, a fault distance measuring device 400 for directly supplying traction network rail current using a single line includes:

[0065] an acquisition module 401 configured to, when a current detected at a first end of a target rail is greater than a preset current threshold, acquire a first current at a first end of a target contact wire corresponding to the target rail, a first voltage representing a potential difference between the first end of the target contact wire and the first end of the target rail, a second voltage representing a potential difference between the second end of the target contact wire and the second end of the target rail, a first impedance representing an impedance per kilometer of the target contact wire, a second impedance representing an impedance per kilometer of the target rail, and a target mutual impedance representing a mutual impedance per kilometer between the target contact wire and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact wire;

[0066] The calculation module 402 is configured to calculate the short-circuit fault distance between the target contact line and the target rail based on the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance, and a preset calculation formula, wherein the calculation formula is:

[0067]

[0068] Wherein, y represents the short-circuit fault distance, represents the first voltage, represents the first current, represents the second voltage, represents the first impedance, represents the second impedance, represents the target mutual impedance.

[0069] In some optional implementations of some embodiments, the current threshold is 500 amps.

[0070] In some optional implementations of some embodiments, the first end and the second end of the target rail respectively represent the starting end and the ending end of the target rail, and the first end and the second end of the target contact line respectively represent the starting end and the ending end of the target contact line.

[0071] It is understood that the modules described in the device 400 are similar to those described in the reference Figure 2 Therefore, the operations, features and beneficial effects described above for the method are also applicable to the apparatus 400 and the modules contained therein, and will not be described in detail here.

[0072] like Figure 5 As shown, electronic device 500 may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 501, which can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 502 or programs loaded from a storage device 508 into a random access memory (RAM) 503. RAM 503 also stores various programs and data required for the operation of electronic device 500. Processing device 501, ROM 502, and RAM 503 are interconnected via a bus 504. An input / output (I / O) interface 505 is also connected to bus 504.

[0073] Typically, the following devices may be connected to the I / O interface 505: an input device 506 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 507 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 508 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 509. The communication device 509 may allow the electronic device 500 to communicate with other devices wirelessly or by wire to exchange data. Figure 5 The electronic device 500 is shown with various devices, but it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed instead. Figure 5 Each block shown in the figure may represent one device, or may represent multiple devices as needed.

[0074] In particular, according to some embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, some embodiments of the present disclosure include a computer program product comprising a computer program or instructions carried on a computer-readable medium, the computer program or instructions containing program code for executing the method shown in the flowchart. In some such embodiments, the computer program can be downloaded and installed from a network via the communication device 509, or installed from the storage device 508, or installed from the ROM 502. When the computer program is executed by the processing device 501, the above-mentioned functions defined in the method of some embodiments of the present disclosure are performed.

[0075] It should be noted that in some embodiments of the present disclosure, the computer-readable medium described above may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. Computer-readable storage media may include, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or components, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more conductors, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In some embodiments of the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device, or component. Furthermore, in some embodiments of the present disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. This propagated data signal may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wire, optical cable, RF (radio frequency), or any suitable combination thereof.

[0076] In some embodiments, the client and server can communicate using any currently known or later developed network protocol, such as HTTP (HyperText Transfer Protocol), and can be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or later developed network.

[0077] The computer-readable medium may be included in the apparatus; or it may exist independently without being incorporated into the electronic device. The computer-readable medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device:

[0078] When the current detected at the first end of the target rail is greater than a preset current threshold, obtaining a first current at the first end of the target contact wire corresponding to the target rail, a first voltage representing a potential difference between the first end of the target contact wire and the first end of the target rail, a second voltage representing a potential difference between the second end of the target contact wire and the second end of the target rail, a first impedance representing an impedance per kilometer of the target contact wire, a second impedance representing an impedance per kilometer of the target rail, and a target mutual impedance representing a mutual impedance per kilometer between the target contact wire and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact wire;

[0079] The short-circuit fault distance between the target contact line and the target rail is calculated according to the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance and a preset calculation formula.

[0080] Computer program code for performing the operations of some embodiments of the present disclosure 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 stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving 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., through the Internet using an Internet service provider).

[0081] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the module, program segment, or a part of 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 box can also occur in a different order than that marked in the accompanying drawings. For example, two 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 box in the block diagram and / or flowchart, and the combination of the boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0082] The modules described in some embodiments of the present disclosure may be implemented in software or hardware. The modules described may also be provided in a processor, for example, as follows:

[0083] Acquisition module, calculation module. For example, the acquisition module can also be described as "a module that acquires, when the current detected at the first end of the target rail is greater than a preset current threshold, a first current at the first end of the target contact wire corresponding to the target rail, a first voltage representing the potential difference between the first end of the target contact wire and the first end of the target rail, a second voltage representing the potential difference between the second end of the target contact wire and the second end of the target rail, a first impedance representing the impedance per kilometer of the target contact wire, a second impedance representing the impedance per kilometer of the target rail, and a target mutual impedance representing the mutual impedance per kilometer of the target contact wire and the target rail."

[0084] Please continue to refer to Figure 3 In some embodiments, the present disclosure further provides a fault distance measurement system for a traction network rail current using a single-line direct supply, comprising a first voltage transformer, a first current transformer, a second voltage transformer, a collection device, a distance measurement device, and a data transmission path, wherein:

[0085] The first end of the first voltage transformer is connected to the first end of the target contact wire, and is used to measure a first voltage between the first end of the target contact wire and the first end of the target rail, and transmit the first voltage to the distance measuring device.

[0086] The first end of the first current transformer is connected to the first end of the target contact line, and is used to measure a first current at the first end of the target contact line and transmit the first current to the distance measuring device.

[0087] The first end of the second voltage transformer is connected to the second end of the target contact wire, and is used to measure a second voltage between the second end of the target contact wire and the second end of the target rail, and transmit the second voltage to the distance measuring device.

[0088] The first end of the acquisition device is connected to the second section of the second voltage transformer, and the second end is connected to the second end of the data transmission path, for receiving the second voltage and transmitting the second voltage to the distance measuring device through the data transmission path;

[0089] The first end of the distance measuring device is connected to the second end of the first voltage transformer, the second end is connected to the second end of the first current transformer, and the third end is connected to the first end of the data transmission path. When the distance measuring device is running, it can be realized as follows: Figure 2 The corresponding steps.

[0090] In some embodiments, the data transmission path is a fiber optic channel. The data transmission path can be a path consisting of a wired connection or a wireless connection. When it is a wired connection, optical fiber can be used as the material of the data exchange path. When it is a wireless connection, the connection method may include but is not limited to 3G / 4G / 5G connection, WiFi connection, Bluetooth connection, WiMAX connection, Zigbee connection, UWB (ultra wideband) connection, and other wireless connection methods currently known or developed in the future. Due to the huge amount of data generated during operation, optical fiber materials for wired connections are often used.

[0091] In addition, in actual operation, the following three methods can be used to calculate the short-circuit fault distance:

[0092] a. The acquisition device sends the collected data to the distance measuring device, which calculates the short-circuit fault distance;

[0093] b. The distance measuring device sends the collected data to the acquisition device, which calculates the short-circuit fault distance;

[0094] c. The distance measuring device sends the collected data to the collection device. At the same time, the distance measuring device sends the collected data to the collection device. The two jointly calculate and send the results of the joint calculation to the preset central calculation device.

[0095] Since distance measuring devices are often installed at stations and have strong computing power, while detection devices may be installed at small collection points in the middle of the route and have weaker computing power, in actual operation, either method a or c is often used.

[0096] In some embodiments, the system further includes a central computing device, which is connected to the second end of the acquisition device and the third end of the distance measuring device respectively.

[0097] The distance measuring device is further used to transmit the first current and the first voltage to the acquisition device, and the acquisition device is further used to implement the steps of the method according to any one of claims 1 to 4 when running.

[0098] The central computing device is configured to simultaneously receive the first short-circuit fault distance calculated by the distance measuring device and the second short-circuit fault distance calculated by the data acquisition device, and to issue an alarm when the difference between the first short-circuit fault distance and the second short-circuit fault distance exceeds a preset first threshold. The first short-circuit fault distance may refer to the short-circuit fault distance calculated by the distance measuring device. The second short-circuit fault distance may refer to the short-circuit fault distance calculated by the data acquisition device. Under normal operating conditions, the two calculated results should be equal. If the two are not equal, an alarm message is issued and subsequent processing, such as manual operation, is performed.

[0099] The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, and without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0100] The above descriptions are merely some preferred embodiments of the present disclosure and illustrate the underlying technical principles. Those skilled in the art should understand that the scope of the invention encompassed by the embodiments of the present disclosure is not limited to technical solutions formed by specific combinations of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the aforementioned inventive concept. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A fault location method using a single-line direct supply traction network rail current, characterized in that: include: When the current detected at the first end of the target rail is greater than a preset current threshold, obtaining a first current at the first end of the target contact wire corresponding to the target rail, a first voltage representing a potential difference between the first end of the target contact wire and the first end of the target rail, a second voltage representing a potential difference between the second end of the target contact wire and the second end of the target rail, a first impedance representing an impedance per kilometer of the target contact wire, a second impedance representing an impedance per kilometer of the target rail, and a target mutual impedance representing a mutual impedance per kilometer between the target contact wire and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact wire; The short-circuit fault distance between the target contact line and the target rail is calculated according to the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance, and a preset calculation formula, wherein the calculation formula is: Wherein, y represents the short-circuit fault distance, represents the first voltage, represents the first current, represents the second voltage, represents the first impedance, represents the second impedance, represents the target mutual impedance.

2. The method according to claim 1, characterized in that The current threshold is 500A.

3. The method according to claim 1, characterized in that The first end and the second end of the target rail represent the beginning and the end of the target rail respectively, and the first end and the second end of the target contact line represent the beginning and the end of the target contact line respectively.

4. A fault distance measuring device using a single-line direct supply of traction network rail current, characterized in that: include: an acquisition module, configured to, when the current detected at the first end of the target rail is greater than a preset current threshold, acquire a first current at a first end of a target contact wire corresponding to the target rail, a first voltage representing a potential difference between the first end of the target contact wire and the first end of the target rail, a second voltage representing a potential difference between the second end of the target contact wire and the second end of the target rail, a first impedance representing an impedance per kilometer of the target contact wire, a second impedance representing an impedance per kilometer of the target rail, and a target mutual impedance representing a mutual impedance per kilometer between the target contact wire and the target rail, wherein the target rail is parallel to and completely corresponds to the target contact wire; a calculation module, configured to calculate a short-circuit fault distance between the target contact line and the target rail according to the first current, the first voltage, the second voltage, the first impedance, the second impedance, the target mutual impedance, and a preset calculation formula; Wherein, the calculation formula is: Wherein, y represents the short-circuit fault distance, represents the first voltage, represents the first current, represents the second voltage, represents the first impedance, represents the second impedance, represents the target mutual impedance.

5. A fault location system using a single-line direct supply of traction network rail current, characterized in that: It includes a first voltage transformer, a first current transformer, a second voltage transformer, a collection device, a distance measuring device and a data transmission path, wherein: The first end of the first voltage transformer is connected to the first end of the target contact wire, and is used to measure a first voltage between the first end of the target contact wire and the first end of the target rail, and transmit the first voltage to the distance measuring device; A first end of the first current transformer is connected to a first end of the target contact wire, and is used to measure a first current at the first end of the target contact wire and transmit the first current to the distance measuring device; A first end of the second voltage transformer is connected to the second end of the target contact wire, and is used to measure a second voltage between the second end of the target contact wire and the second end of the target rail, and transmit the second voltage to the distance measuring device; The first end of the acquisition device is connected to the second section of the second voltage transformer, and the second end is connected to the second end of the data transmission path, for receiving the second voltage and transmitting the second voltage to the distance measuring device through the data transmission path; The first end of the distance measuring device is connected to the second end of the first voltage transformer, the second end is connected to the second end of the first current transformer, and the third end is connected to the first end of the data transmission path. When the distance measuring device is in operation, the steps of the method according to any one of claims 1 to 3 are implemented.

6. The system according to claim 5, characterized in that The data transmission path is a fiber optic channel.

7. The system according to claim 5, characterized in that The system further includes a central computing device, the central computing device being connected to the second end of the acquisition device and the third end of the distance measuring device respectively; The distance measuring device is further used to transmit the first current and the first voltage to the acquisition device, and the acquisition device is further used to implement the steps of the method according to any one of claims 1 to 3 when in operation; The central computing device is used to simultaneously receive the first short-circuit fault distance calculated by the distance measuring device and the second short-circuit fault distance calculated by the acquisition device, and to issue an alarm when the difference between the first short-circuit fault distance and the second short-circuit fault distance is greater than a preset first threshold.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

9. A computer program product comprising a computer program or instructions, characterized in that: When the computer program or instruction is executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

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