A rail traction return current monitoring device and method based on choke transformer

Abstract

The present application proposes a rail traction return current monitoring device and method based on a choke transformer, the device comprising: a first sampling terminal board, a second sampling terminal board and a rail traction return current monitoring device body; the first interfaces of the first sampling terminal board and the second sampling terminal board are connected to the internal terminals of the choke transformer; the second interfaces of the first sampling terminal board and the second sampling terminal board are connected to the iron core coil lead wires of the choke transformer; the third interfaces of the first sampling terminal board and the second sampling terminal board are connected to the wiring terminals of the rail traction return current monitoring device body; the rail traction return current monitoring device body is installed on the iron core coil protective cover of the choke transformer; the present application can accurately monitor the rail traction return current value, solving the problem that the traction return current monitoring device occupies the installation space of the trackside equipment and is inconvenient to install and maintain.

Description

Technical Field

[0001] The present application belongs to the technical field of railway signal equipment monitoring, and specifically relates to a rail traction return current monitoring device and method based on a choke transformer. Background Art

[0002] In electrified track sections, some traction current returns via return lines to the traction substation, some via the rails near the substation grounding point, and a small amount flows through the trackbed to the ground or is lost. The rails and ground form the traction current return path, and currents flowing through them can reach hundreds of amperes. Traction return current can affect railway signaling equipment in three ways: damage to signaling equipment, damage to rails and insulation joints, and voltage fluctuations in track circuits.

[0003] Currently in use, traction return current monitoring equipment primarily includes fixed traction return current monitoring systems, various portable traction return current monitoring devices, and various clamp-on ammeters. Fixed traction return current monitoring systems consist of both outdoor and indoor equipment. The outdoor equipment primarily consists of a traction return current collector, typically cement-encased and fixed near the choke transformer. While these devices offer ideal real-time monitoring performance and other technical indicators, they are bulky, occupying limited trackside equipment installation space and presenting challenges such as inconvenience in construction and maintenance. Portable traction return current monitoring devices include two caliper sensors that can simultaneously measure the traction current on two rails. These devices offer data recording capabilities, and some devices can transmit data remotely. However, portable devices are generally battery-powered, resulting in limited endurance. They must be deployed in the relevant section after signs of a problem are detected. These measurements are performed after the fact, and the frequent battery replacements make operation and maintenance inconvenient. Clamp-on ammeters are the most common traction return current monitoring devices used on-site. A single clamp meter can only measure the current of a single rail. When using two clamp meters, errors can be large due to differences in the technical status of the two devices and the response time of manual readings. It can only measure the total current in the rail and cannot filter out the track circuit signal current component. It lacks data recording capabilities, so the number of data points that can be manually recorded is limited. Summary of the Invention

[0004] Based on the above technical problems, this application proposes a rail traction return current monitoring device and method based on a choke transformer. The rail traction return current monitoring device is installed in the choke transformer, which solves the problem that the traction return current monitoring device occupies the installation space of the trackside equipment and is inconvenient to install and maintain.

[0005] In a first aspect, the present application proposes a rail traction return current monitoring device based on a choke transformer, comprising: a first sampling terminal board, a second sampling terminal board, and a rail traction return current monitoring device body;

[0006] The first interface of the first sampling terminal board is connected to the first terminal inside the choke transformer; the first interface of the second sampling terminal board is connected to the second terminal inside the choke transformer; the second interface of the first sampling terminal board is connected to the first end of the core coil lead wire of the choke transformer; the second interface of the second sampling terminal board is connected to the second end of the core coil lead wire of the choke transformer; the third interface of the first sampling terminal board is connected to the first terminal of the main body of the rail traction return current monitoring device, and the third interface of the second sampling terminal board is connected to the second terminal of the main body of the rail traction return current monitoring device; the main body of the rail traction return current monitoring device is installed on the core coil protective cover of the choke transformer;

[0007] The first sampling terminal board is used to transmit the first rail traction return current signal in the choke transformer to the rail traction return current monitoring device body;

[0008] The second sampling terminal board is used to transmit the second rail traction return current signal in the choke transformer to the rail traction return current monitoring device body;

[0009] The rail traction return current monitoring device body is used to monitor the first rail traction return current signal and the second rail traction return current signal transmitted back by the first sampling terminal board and the second sampling terminal board respectively, and output corresponding rail traction return current values.

[0010] The rail traction backflow monitoring device body includes: a first signal conditioning circuit, a second signal conditioning circuit, a first analog-to-digital conversion circuit, a second analog-to-digital conversion circuit, a digital signal processing circuit, and a power carrier module;

[0011] The signal input interface of the first signal conditioning circuit is connected to the third interface of the first sampling terminal board, the signal output interface of the first signal conditioning circuit is connected to the signal input interface of the first analog-to-digital conversion circuit, the signal input interface of the second signal conditioning circuit is connected to the third interface of the second sampling terminal board, the signal output interface of the second signal conditioning circuit is connected to the signal input interface of the second analog-to-digital conversion circuit, the signal output interface of the second analog-to-digital conversion circuit is connected to the first port of the digital signal processing circuit, and the first port of the power carrier module is connected to the second port of the digital signal processing circuit;

[0012] The first signal conditioning circuit is used to isolate and operationally amplify the first rail traction return signal to obtain a first conditioned traction return signal;

[0013] The second signal conditioning circuit is used to isolate and operationally amplify the second rail traction return signal to obtain a second conditioned traction return signal;

[0014] The first analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the first conditioned traction return signal to obtain a first digital traction return signal;

[0015] The second analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the second conditioned traction return signal to obtain a second digital traction return signal;

[0016] The digital signal processing circuit is used to calculate the corresponding rail traction return current value according to the first digital traction return current signal and the second digital traction return current signal, and output the rail traction return current value to the power carrier module;

[0017] The power carrier module is used to send the received rail traction return current value to the server.

[0018] The digital signal processing circuit is further configured to calculate an unbalanced current value and a traction return unbalance rate based on the first digital traction return signal and the second digital traction return signal, and send the calculated unbalanced current value and traction return unbalance rate to the power carrier module.

[0019] The power carrier module is further configured to receive a control instruction sent by a server and send the control instruction to the digital signal processing circuit.

[0020] The control instruction includes: a calibration instruction; the digital signal processing circuit is further used to receive the calibration instruction transmitted by the power carrier module. After receiving the calibration instruction, the digital signal processing circuit is in a calibration mode, receives the revision coefficient input by the user in the calibration mode, and ends the calibration mode after receiving the revision coefficient, and uses the sum of the corresponding rail traction return current value and the revision coefficient as the final rail traction return current value.

[0021] In a second aspect, the present application proposes a rail traction return current monitoring method based on a choke transformer, comprising:

[0022] The first rail traction return current signal and the second rail traction return current signal are collected, and the corresponding rail traction return current value is calculated and output according to the first rail traction return current signal and the second rail traction return current signal.

[0023] The calculating and outputting a corresponding rail traction return current value according to the first rail traction return current signal and the second rail traction return current signal includes:

[0024] isolating and operationally amplifying the first rail traction return signal to obtain a first conditioned traction return signal;

[0025] isolating and operationally amplifying the second rail traction return signal to obtain a second conditioned traction return signal;

[0026] performing analog-to-digital conversion on the first conditioned traction return signal to obtain a first digital traction return signal;

[0027] performing analog-to-digital conversion on the second conditioned traction return signal to obtain a second digital traction return signal;

[0028] A corresponding rail traction return current value is calculated according to the first digital traction return current signal and the second digital traction return current signal, and the rail traction return current value is sent to a server.

[0029] In a third aspect, the present application proposes a computer program product, comprising: a computer program / instruction, which, when executed by a processor, implements the steps of the rail traction return current monitoring method based on a choke transformer.

[0030] In a fourth aspect, the present application proposes an electronic device comprising: one or more processors, and a memory, wherein the memory stores instructions, and when the instructions are executed by the one or more processors, the one or more processors execute the rail traction return current monitoring method based on a choke transformer.

[0031] In a fifth aspect, the present application proposes a computer-readable storage medium storing executable instructions, which, when executed, enable a processor to execute the rail traction return current monitoring method based on a choke transformer.

[0032] Beneficial effects:

[0033] The present application proposes a rail traction return current monitoring device and method based on a choke transformer. The rail traction return current monitoring device is installed in the choke transformer, which solves the problem that the traction return current monitoring device occupies the installation space of trackside equipment and is inconvenient to install and maintain. The present application has the following advantages: high flexibility, easy installation, low cost, high work efficiency, and no impact on existing line operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of a rail traction return current monitoring device based on a choke transformer according to an embodiment of the present application;

[0035] Figure 2 This is a schematic diagram of a first sampling terminal board according to an embodiment of the present application;

[0036] Figure 3 This is a schematic diagram of a rail traction return current monitoring device installed on a choke transformer according to an embodiment of the present application;

[0037] Figure 4 This is a side view of a rail traction return current monitoring device installed on a choke transformer according to an embodiment of the present application;

[0038] Figure 5 This is a schematic diagram of the internal structure of a rail traction return current monitoring device based on a choke transformer according to an embodiment of the present application;

[0039] Figure 6 This is a flow chart of a rail traction return current monitoring method based on a choke transformer according to an embodiment of the present application;

[0040] Among them, 1 is the first sampling terminal board, 2 is the second sampling terminal board, 3 is the main body of the rail traction return current monitoring device, 1-1 is the first interface of the first sampling terminal board, 1-2 is the second interface of the first sampling terminal board, 1-3 is the third interface of the first sampling terminal board, 2-1 is the first interface of the second sampling terminal board, 2-2 is the second interface of the second sampling terminal board, 2-3 is the third interface of the second sampling terminal board, 4 is the first terminal inside the choke transformer, 5 is the second terminal inside the choke transformer, 6 is the first end of the iron core coil lead wire of the choke transformer, 7 is the second end of the iron core coil lead wire of the choke transformer, and 8 is the choke transformer. DETAILED DESCRIPTION

[0041] The present disclosure will be further described below with reference to the embodiments shown in the accompanying drawings.

[0042] Railway electrification, a crucial component of today's railways, provides the conditions and support for its advantages, including high transport capacity, high energy efficiency, low pollution, and energy conservation and environmental protection. However, electrified railways also place higher demands on on-site maintenance and repair. On high-speed, heavily loaded, and steeply graded lines, the traction current of trains increases with increasing speed.

[0043] In electrified track sections, some traction current returns via return lines to the traction substation, some via the rails near the substation grounding point, and a small amount flows through the trackbed to the ground or is lost. The rails and ground form the traction current return path, and currents flowing through them can reach hundreds of amperes. Traction return current can affect railway signaling equipment in three ways: damage to signaling equipment, damage to rails and insulation joints, and voltage fluctuations in track circuits.

[0044] Railway signal control systems typically utilize microelectronics technology, making them particularly sensitive to electromagnetic interference. Track circuits are essential infrastructure for railway transportation, ensuring dispatching, command, and train operation control. Their electromagnetic environment is complex and harsh. Whether signal cable burnout on heavy-load lines or insulation joint burnout on high-speed railways, both are primarily caused by unbalanced return current. Unbalanced return current can lead to equipment failures and potentially malfunction of signaling equipment, impacting operational efficiency and even threatening transportation safety.

[0045] The traction return flow monitoring equipment currently in use mainly includes the following three categories:

[0046] 1. Fixed traction reflux monitoring system

[0047] This type of equipment consists of both outdoor and indoor units. The outdoor unit primarily consists of a traction return current collector, typically cement-encased and fixed near the choke transformer. The system power supply is located indoors, and signal cables lead the power supply outdoors to power the monitoring extension. The monitoring extension uses calipers to collect the traction current from the two-wire lead-in connection between the two rails. It calculates key parameters such as the dual-rail traction return current value and current difference, and transmits them back indoors via a power carrier. While these devices offer ideal technical indicators such as real-time monitoring, the system is bulky, occupies limited trackside equipment installation space, and presents challenges such as inconvenient construction and maintenance.

[0048] 2. Various portable traction reflux monitoring equipment

[0049] This type of equipment, equipped with two caliper sensors, can simultaneously measure the traction current of two rails. It also features data logging capabilities, and some devices can transmit data remotely. However, portable devices are generally battery-powered, which limits their autonomy. They must be deployed in relevant sections after signs of a problem are detected. This is a post-measurement measure, and the frequent need for battery replacement makes operation and maintenance inconvenient.

[0050] 3. Various types of clamp ammeters

[0051] The most common traction return current monitoring equipment on site is various clamp-on ammeters. A single clamp-on meter can only measure the current of a single rail. Using two clamp-on meters can lead to significant errors due to differences in the technical status of the two devices and the response time of manual readings. They can only measure the total current in the rail and cannot filter out the track circuit signal current component. They also lack data logging capabilities, limiting the number of data points that can be recorded manually.

[0052] Based on the above technical problems, this application proposes a rail traction return current monitoring device and method based on a choke transformer. The rail traction return current monitoring device is installed in the choke transformer, which does not require large monitoring equipment and can accurately measure the rail traction return current value, solving the problem that the traction return current monitoring device occupies the installation space of the trackside equipment and is inconvenient to install and maintain.

[0053] Example 1:

[0054] The difference in traction current between the two rails of the line at the same time is the fundamental cause of track circuit interference. Real-time detection, recording and calculation of the difference between the traction return currents in the two rails is the most direct detection method.

[0055] Electrified track sections contain devices such as choke transformers. If the currents flowing through the two rails are equal, the potentials generated by the traction return currents cancel each other out, leaving signal equipment along the line unaffected. However, factors such as rail impedance, connecting wire impedance, ground leakage, and the technical condition of the choke transformer coils can lead to imbalanced traction return currents. This means that at the same moment, there is a difference in the traction current flowing through the two rails of the line. When the traction currents are unbalanced, the magnetic flux on the primary side of the choke transformer cannot cancel each other out, generating an induced voltage on the secondary side. This voltage intrudes into the track circuit, causing red light bands and even relay malfunctions.

[0056] This embodiment proposes a rail traction return current monitoring device based on a choke transformer, which is used to monitor the rail traction return current values ​​at two locations, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, it includes: a first sampling terminal board 1, a second sampling terminal board 2 and a rail traction backflow monitoring device body 3;

[0057] The first interface 1-1 of the first sampling terminal board 1 is connected to the first terminal 4 inside the choke transformer 8; the first interface 2-1 of the second sampling terminal board 2 is connected to the second terminal 5 inside the choke transformer 8; the second interface 1-2 of the first sampling terminal board 1 is connected to the first end 6 of the core coil lead wire of the choke transformer 8; the second interface 2-2 of the second sampling terminal board 2 is connected to the second end 7 of the core coil lead wire of the choke transformer 8; the third interface 1-3 of the first sampling terminal board 1 is connected to the first terminal of the rail traction return current monitoring device body 3, and the third interface 2-3 of the second sampling terminal board 2 is connected to the second terminal of the rail traction return current monitoring device body 3; the rail traction return current monitoring device body is installed on the core coil protective cover of the choke transformer 8;

[0058] The first sampling terminal board 1 is used to transmit the first rail traction return current signal in the choke transformer 8 to the rail traction return current monitoring device body 3;

[0059] The second sampling terminal board 2 is used to transmit the second rail traction return current signal in the choke transformer 8 to the rail traction return current monitoring device body 3;

[0060] The rail traction return current monitoring device body 3 is used to monitor the first rail traction return current signal and the second rail traction return current signal transmitted by the first sampling terminal board 1 and the second sampling terminal board 2 respectively, and output corresponding rail traction return current values.

[0061] The rail traction backflow monitoring device body 3, such as Figure 5As shown, it includes: a first signal conditioning circuit, a second signal conditioning circuit, a first analog-to-digital conversion circuit, a second analog-to-digital conversion circuit, a digital signal processing circuit, and a power carrier module;

[0062] The signal input interface of the first signal conditioning circuit is connected to the third interface of the first sampling terminal board, the signal output interface of the first signal conditioning circuit is connected to the signal input interface of the first analog-to-digital conversion circuit, the signal input interface of the second signal conditioning circuit is connected to the third interface of the second sampling terminal board, the signal output interface of the second signal conditioning circuit is connected to the signal input interface of the second analog-to-digital conversion circuit, the signal output interface of the second analog-to-digital conversion circuit is connected to the first port of the digital signal processing circuit, and the first port of the power carrier module is connected to the second port of the digital signal processing circuit;

[0063] The first signal conditioning circuit is used to isolate and operationally amplify the first rail traction return signal to obtain a first conditioned traction return signal;

[0064] The second signal conditioning circuit is used to isolate and operationally amplify the second rail traction return signal to obtain a second conditioned traction return signal;

[0065] The first analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the first conditioned traction return signal to obtain a first digital traction return signal;

[0066] The second analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the second conditioned traction return signal to obtain a second digital traction return signal;

[0067] The digital signal processing circuit is used to calculate the corresponding rail traction return current value according to the first digital traction return current signal and the second digital traction return current signal, and output the rail traction return current value to the power carrier module;

[0068] The power carrier module is used to send the received rail traction return current value to the server.

[0069] In this embodiment, the first sampling terminal board 1 and the second sampling terminal board 2 are mirror images of each other. Each sampling terminal board includes two brass terminals (i.e., the first and second interfaces of the sampling terminal board) and a sampling terminal (i.e., the third interface of the sampling terminal board). Both brass terminals are connected to the internal components of the choke transformer, and one sampling terminal is connected to the rail traction return current monitoring device body 3. The sampling terminal is connected to the signal conditioning circuit of the rail traction return current monitoring device body 3 via screws.

[0070] When the rail traction return current monitoring device is working, the traction return current signal flows into the first interface 1-1 of the first acquisition terminal board 1 and the first interface 2-1 of the second acquisition terminal board 2 through the internal terminal column of the choke transformer at an interval of 50ms. Then the signal conditioning circuit of the main body of the rail traction return current monitoring device flows to the second interface 1-2 of the first acquisition terminal board 1 and the second interface 2-2 of the second acquisition terminal board 2 connected to the lead wires of the choke transformer core coil, realizing the traction return current diversion; at the same time, the traction return current signal is sent to the device signal conditioning circuit through the third interface 1-3 of the first acquisition terminal board 1 and the third interface 2-3 of the second acquisition terminal board 2.

[0071] The first signal conditioning circuit, the second signal conditioning circuit, the first analog-to-digital conversion circuit, the second analog-to-digital conversion circuit, the digital signal processing circuit, and the power carrier module in the main body 3 of the rail traction return current monitoring device are all inside the protective outer shell. Considering that the rail traction return current monitoring device is installed inside the choke transformer, the protection level of the protective outer shell adopts an IP62 protective shell. There are two cable interfaces on the outer surface of the main body of the rail traction return current monitoring device for accessing power supply / data cables. One of the two cable interfaces is commonly used and the other is spare.

[0072] The first signal conditioning circuit and the second signal conditioning circuit are used for isolation and signal conditioning of the traction return signal, including two sets of pre-stage conditioning circuits consisting of an electromagnetic coupling isolation circuit and an operational amplifier, which respectively realize the left and right rail signal input protection and conditioning. The specific implementation process of the conditioning circuit belongs to the existing technology and will not be repeated in this application.

[0073] The first analog-to-digital conversion circuit and the second analog-to-digital conversion circuit perform analog-to-digital conversion on the conditioned traction return signal through a sampling and holding circuit. The specific implementation process belongs to the existing technology and will not be repeated in this application.

[0074] The digital signal processing circuit is configured to calculate the corresponding rail traction return current value based on the first and second digital traction return current signals, calculate the unbalanced current value and the traction return current unbalance rate based on the first and second digital traction return current signals, and transmit the calculated rail traction return current value, unbalanced current value, and traction return current unbalance rate to the power carrier module. The digital signal processing circuit utilizes a DSP chip as its core. The first and second analog-to-digital conversion circuits input and process data to obtain and output monitoring information, and respond to control commands from the server. The power carrier module receives control instructions from the server and transmits the control instructions to the digital signal processing circuit.

[0075] The control instructions include calibration instructions; the digital signal processing circuit is further configured to receive the calibration instructions transmitted by the power carrier module. Upon receiving the calibration instructions, the digital signal processing circuit enters a calibration mode, receives a user-entered revision coefficient in the calibration mode, and terminates the calibration mode after receiving the revision coefficient. The sum of the corresponding rail traction return current value and the revision coefficient is used as the final rail traction return current value. The revision coefficient is obtained using a comparison method, wherein a large current generator is used to generate a calibration signal, a rail traction return current monitoring device and a multimeter are used to simultaneously measure the traction return current signals of two rails, and the difference between the multimeter and the rail traction return current monitoring device is used to generate a revision coefficient, which is then input by the user.

[0076] The digital signal processing circuit also includes a digital filter that can filter out common domestic track circuit signals such as ZPW2000, UM71, and domestic 18 information frequency shift.

[0077] The power carrier module also features a power interface capable of providing external power. Also connected to the power carrier module is a voltage regulator circuit, which converts voltage and supplies power to the various circuits of the rail traction return current monitoring device. The device also includes a lightning protection unit to prevent damage from lightning strikes and fuses to prevent high-current signals from intruding due to equipment anomalies.

[0078] This embodiment proposes a rail traction return current monitoring device based on a choke transformer. Through the first sampling terminal board, the second sampling terminal board and the rail traction return current monitoring device body installed in the choke transformer, real-time monitoring of the traction return current monitoring values ​​in the two rails is achieved. The traction return current monitoring values ​​can be accurately monitored without the need for large equipment, solving the problem of the traction return current monitoring device occupying the installation space of trackside equipment and the inconvenience of installation and maintenance. The device has the advantages of high flexibility, easy installation, low cost, high working efficiency and no impact on the operation of existing lines.

[0079] Example 2:

[0080] This embodiment proposes a rail traction return current monitoring method based on a choke transformer, such as Figure 6 As shown, including:

[0081] Step S1: collecting the first rail traction return signal and the second rail traction return signal;

[0082] Step S2: Calculate and output a corresponding rail traction return current value according to the first rail traction return current signal and the second rail traction return current signal.

[0083] The calculating and outputting a corresponding rail traction return current value according to the first rail traction return current signal and the second rail traction return current signal includes:

[0084] isolating and operationally amplifying the first rail traction return signal to obtain a first conditioned traction return signal;

[0085] isolating and operationally amplifying the second rail traction return signal to obtain a second conditioned traction return signal;

[0086] performing analog-to-digital conversion on the first conditioned traction return signal to obtain a first digital traction return signal;

[0087] performing analog-to-digital conversion on the second conditioned traction return signal to obtain a second digital traction return signal;

[0088] A corresponding rail traction return current value is calculated according to the first digital traction return current signal and the second digital traction return current signal, and the rail traction return current value is sent to a server.

[0089] This embodiment proposes a choke transformer-based rail traction return current monitoring method, which includes: separately collecting dual-rail traction return current signals, isolating and amplifying the signals, further performing analog-to-digital conversion, and finally calculating the corresponding rail traction return current value. The value is then transmitted to a server. The method proposed in this embodiment can accurately monitor dual-rail traction return current values.

[0090] Example 3:

[0091] This embodiment provides a computer program product, including: a computer program / instruction, which, when executed by a processor, implements the steps of the rail traction return current monitoring method based on a choke transformer.

[0092] Example 4:

[0093] This embodiment proposes an electronic device, including: one or more processors, and a memory, wherein the memory stores instructions, and when the instructions are executed by the one or more processors, the one or more processors execute the rail traction return current monitoring method based on a choke transformer.

[0094] The electronic device can be a mobile phone, computer, or tablet computer, and includes a memory and a processor. The memory stores a computer program that, when executed by the processor, implements the rail traction return current monitoring method based on a choke transformer as described in the embodiments. It is understood that the electronic device may also include an input / output (I / O) interface and a communication component.

[0095] The processor is configured to execute all or part of the steps of the choke transformer-based rail traction return current monitoring method described in the above embodiment. The memory is configured to store various types of data, such as instructions for any application or method in the electronic device, as well as data related to the application.

[0096] The processor can be an application specific integrated circuit (ASIC), a digital signal processor (DSP), a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components, and is used to execute the rail traction return current monitoring method based on the choke transformer described in the above embodiment.

[0097] Example 5:

[0098] This embodiment provides a computer-readable storage medium storing executable instructions. When the instructions are executed, a processor is enabled to execute the rail traction return current monitoring method based on a choke transformer.

[0099] The functional units in various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. If the functions are implemented as software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium.

[0100] Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the rail traction return current monitoring method based on a choke transformer described in each embodiment of the present application.

[0101] The aforementioned storage media include: flash memory, hard disk, multimedia card, card-type memory (for example, SD (Secure Digital Memory Card) or DX (Memory Data Register, MDR abbreviation, memory data register) memory, etc.), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, disk, CD, server, APP (Application, abbreviation of application software) application store and other media that can store program verification codes, on which a computer program is stored. When the computer program is executed by the processor, the various steps of the above-mentioned rail traction return current monitoring method based on the choke transformer can be implemented.

[0102] The various embodiments in the present disclosure are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0103] The scope of protection of the present disclosure is not limited to the above-described embodiments. Obviously, those skilled in the art may make various modifications and variations to the present disclosure without departing from the scope and spirit of the present disclosure. If such modifications and variations fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such modifications and variations.

Claims

1. A rail traction return current monitoring device based on a choke transformer, characterized in that: include: A first sampling terminal board, a second sampling terminal board and a rail traction return current monitoring device body; The first interface of the first sampling terminal board is connected to the first terminal inside the choke transformer; the first interface of the second sampling terminal board is connected to the second terminal inside the choke transformer; the second interface of the first sampling terminal board is connected to the first end of the core coil lead wire of the choke transformer; the second interface of the second sampling terminal board is connected to the second end of the core coil lead wire of the choke transformer; the third interface of the first sampling terminal board is connected to the first terminal of the main body of the rail traction return current monitoring device, and the third interface of the second sampling terminal board is connected to the second terminal of the main body of the rail traction return current monitoring device; the main body of the rail traction return current monitoring device is installed on the core coil protective cover of the choke transformer; The first sampling terminal board is used to transmit the first rail traction return current signal in the choke transformer to the rail traction return current monitoring device body; The second sampling terminal board is used to transmit the second rail traction return current signal in the choke transformer to the rail traction return current monitoring device body; The rail traction return current monitoring device body is used to monitor the first rail traction return current signal and the second rail traction return current signal transmitted by the first sampling terminal board and the second sampling terminal board respectively, and output the corresponding rail traction return current value; The first sampling terminal board and the second sampling terminal board are mirror images of each other. Each sampling terminal board includes two brass terminals and a sampling terminal. The brass terminals are connected to the inside of the choke transformer, and the sampling terminal is connected to the main body of the rail traction return current monitoring device; the sampling terminal is connected to the signal conditioning circuit of the main body of the rail traction return current monitoring device through screws.

2. The rail traction return current monitoring device based on a choke transformer according to claim 1 is characterized in that: The rail traction backflow monitoring device body includes: a first signal conditioning circuit, a second signal conditioning circuit, a first analog-to-digital conversion circuit, a second analog-to-digital conversion circuit, a digital signal processing circuit, and a power carrier module; The signal input interface of the first signal conditioning circuit is connected to the third interface of the first sampling terminal board, the signal output interface of the first signal conditioning circuit is connected to the signal input interface of the first analog-to-digital conversion circuit, the signal input interface of the second signal conditioning circuit is connected to the third interface of the second sampling terminal board, the signal output interface of the second signal conditioning circuit is connected to the signal input interface of the second analog-to-digital conversion circuit, the signal output interface of the second analog-to-digital conversion circuit is connected to the first port of the digital signal processing circuit, and the first port of the power carrier module is connected to the second port of the digital signal processing circuit; The first signal conditioning circuit is used to isolate and operationally amplify the first rail traction return signal to obtain a first conditioned traction return signal; The second signal conditioning circuit is used to isolate and operationally amplify the second rail traction return signal to obtain a second conditioned traction return signal; The first analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the first conditioned traction return signal to obtain a first digital traction return signal; The second analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the second conditioned traction return signal to obtain a second digital traction return signal; The digital signal processing circuit is used to calculate the corresponding rail traction return current value according to the first digital traction return current signal and the second digital traction return current signal, and output the rail traction return current value to the power carrier module; The power carrier module is used to send the received rail traction return current value to the server.

3. The rail traction return current monitoring device based on a choke transformer according to claim 2, characterized in that: The digital signal processing circuit is further configured to calculate an unbalanced current value and a traction return unbalance rate based on the first digital traction return signal and the second digital traction return signal, and send the calculated unbalanced current value and traction return unbalance rate to the power carrier module.

4. The rail traction return current monitoring device based on a choke transformer according to claim 2, characterized in that: The power carrier module is further configured to receive a control instruction sent by a server and send the control instruction to the digital signal processing circuit.

5. The rail traction return current monitoring device based on a choke transformer according to claim 4 is characterized in that: The control instruction includes: a calibration instruction; the digital signal processing circuit is further used to receive the calibration instruction transmitted by the power carrier module. After receiving the calibration instruction, the digital signal processing circuit is in a calibration mode, receives the revision coefficient input by the user in the calibration mode, and ends the calibration mode after receiving the revision coefficient, and uses the sum of the corresponding rail traction return current value and the revision coefficient as the final rail traction return current value.

6. A method for monitoring rail traction return current based on a choke transformer, applied to a rail traction return current monitoring device based on a choke transformer as claimed in any one of claims 1 to 5, characterized in that: include: Collecting a first rail traction return current signal and a second rail traction return current signal, and calculating and outputting a corresponding rail traction return current value according to the first rail traction return current signal and the second rail traction return current signal; When the rail traction return current monitoring device is working, the traction return current signal flows into the first interface of the first acquisition terminal board and the first interface of the second acquisition terminal board through the internal terminal column of the choke transformer, and then the signal conditioning circuit of the main body of the rail traction return current monitoring device flows to the second interface of the first acquisition terminal board and the second interface of the second acquisition terminal board connected to the lead wire of the choke transformer core coil, thereby realizing traction return current diversion; at the same time, the traction return current signal is sent to the signal conditioning circuit through the third interface of the first acquisition terminal board and the third interface of the second acquisition terminal board.

7. The rail traction return current monitoring method based on a choke transformer according to claim 6, characterized in that: The calculating and outputting a corresponding rail traction return current value according to the first rail traction return current signal and the second rail traction return current signal includes: isolating and operationally amplifying the first rail traction return signal to obtain a first conditioned traction return signal; isolating and operationally amplifying the second rail traction return signal to obtain a second conditioned traction return signal; performing analog-to-digital conversion on the first conditioned traction return signal to obtain a first digital traction return signal; performing analog-to-digital conversion on the second conditioned traction return signal to obtain a second digital traction return signal; A corresponding rail traction return current value is calculated according to the first digital traction return current signal and the second digital traction return current signal, and the rail traction return current value is sent to a server.

8. A computer program product, characterized in that The method comprises a computer program / instruction, which, when executed by a processor, implements the steps of the rail traction return current monitoring method based on a choke transformer as described in any one of claims 6 to 7.

9. An electronic device, characterized in that: include: One or more processors, and a memory, wherein the memory stores instructions, and when the instructions are executed by the one or more processors, the one or more processors execute the rail traction return current monitoring method based on a choke transformer as described in any one of claims 6-7.

10. A computer-readable storage medium, characterized in that It stores executable instructions, which, when executed, enable the processor to execute the rail traction return current monitoring method based on a choke transformer as described in any one of claims 6-7.

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