Electrified railway traction backflow collecting device

Abstract

The utility model relates to the technical field of current acquisition and monitoring, and provides an electrified railway traction backflow acquisition device, which comprises a first shell internally integrated with a data collection unit; the second shell is arranged on the live cable, and a self-energy-taking unit is integrated in the second shell and used for taking electricity from the live cable in an induction mode; the at least two third shells are arranged on the to-be-detected cable in a one-to-one correspondence mode, and current acquisition sensors are arranged in the third shells and used for acquiring current parameters in the to-be-detected cable; the second shell and the third shell are both connected with the first shell. According to the utility model, the data collection unit, the self-energy-taking unit and the current acquisition sensor are respectively arranged in the three shells, so that the installation and the monitoring are more convenient, and the device can be flexibly applied to different positions of a traction backflow path of an electrified railway, and has strong portability; a plurality of current acquisition sensors can be used at the same time to detect a plurality of cables, and the monitoring efficiency of the cables is improved.

Description

Technical Field

[0001] This utility model relates to the field of current acquisition and monitoring technology, and in particular to an electrified railway traction return current acquisition device. Background Technology

[0002] In electrified railway systems, the traction return current system is a crucial component, primarily used to return traction current from the locomotive to the substation, forming a closed loop. Generally, the traction return current system can be divided into the following parts: rails, return wires, suction wires, grounding system, choke transformers, insulation joints, monitoring and protection devices, etc. Monitoring the traction return current is vital for ensuring the safe operation of the railway system. Traditional monitoring devices typically require an external power supply, and data transmission is mostly wired, resulting in complex installation, difficult maintenance, and insufficient data transmission security. Based on this, some technological improvements have integrated power supplies, communication modules, and control modules that can draw power from cables into a single housing, overcoming the aforementioned shortcomings. However, this integrated monitoring device still has some drawbacks: because the power supply is located inside the housing, the entire housing must be installed on the live cable, and the large size of the housing makes installation inconvenient; each monitoring device can only monitor one line, leading to low monitoring efficiency. Therefore, developing a more convenient and efficient monitoring device is of significant practical importance. Utility Model Content

[0003] This utility model provides an electrified railway traction return current acquisition device to solve the technical problems of existing traction return current monitoring devices, such as large size, inconvenient installation, and low monitoring efficiency.

[0004] This utility model provides a traction return current acquisition device for electrified railways, comprising:

[0005] The first casing integrates a data aggregation unit.

[0006] The second housing is disposed on the live cable, and the interior of the second housing integrates a self-powered unit for inductively drawing power from the live cable.

[0007] At least two third housings are respectively disposed on the cable under test, and a current acquisition sensor is disposed inside the third housing to acquire the current parameters in the cable under test;

[0008] Both the second housing and the third housing are connected to the first housing.

[0009] According to the present invention, there is an electrified railway traction return current acquisition device.

[0010] The live cable passes through the second housing, and the second housing is detachably connected to the live cable;

[0011] The cable under test passes through the third housing, and the third housing is detachably connected to the cable under test.

[0012] According to the present invention, there is an electrified railway traction return current acquisition device.

[0013] The data aggregation unit includes:

[0014] The controller is connected to the current acquisition sensor and the self-powered unit.

[0015] According to the present invention, there is an electrified railway traction return current acquisition device.

[0016] The self-powered unit includes:

[0017] An energy harvester, electromagnetically coupled to the energized cable, is used to harvest electrical energy;

[0018] An energy storage device, connected to the energy harvester, is used to store at least a portion of the acquired electrical energy.

[0019] According to the present invention, there is an electrified railway traction return current acquisition device.

[0020] The data aggregation unit also includes:

[0021] A memory, connected to the controller, is used to locally store the current parameters collected by the current acquisition sensor.

[0022] According to the present invention, there is an electrified railway traction return current acquisition device.

[0023] The data aggregation unit also includes:

[0024] A timer, connected to the current acquisition sensor, is used to add a timestamp to each current parameter acquired by the current acquisition sensor.

[0025] According to the present invention, there is an electrified railway traction return current acquisition device.

[0026] The first housing is provided with a clock interface for calibrating the timer.

[0027] According to the present invention, there is an electrified railway traction return current acquisition device.

[0028] The data aggregation unit also includes:

[0029] A transmitter, connected to the controller, is used to transmit the current parameters.

[0030] According to the present invention, there is an electrified railway traction return current acquisition device.

[0031] Also includes:

[0032] The cloud platform is connected to the transmitter.

[0033] A local server is connected to the transmitter.

[0034] According to the present invention, there is an electrified railway traction return current acquisition device.

[0035] The data aggregation unit also includes:

[0036] The encryption module is connected to both the controller and the current acquisition sensor.

[0037] This invention features a three-shell design: a current collection unit integrated in the first shell, a self-powered unit integrated in the second shell, and a current acquisition sensor integrated in the third shell. This design allows the second shell to be installed on a live cable, the third shell to be installed on the cable under test, and the installation location of the first shell to be freed from the constraints of the live cable. Furthermore, separating the two units reduces the size of the first shell, making it easier to install. The first shell can connect to multiple current acquisition sensors, each capable of detecting the current in a single cable, thus significantly improving cable monitoring efficiency. It is highly portable and can be flexibly applied to different locations along the traction return path of electrified railways. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is a diagram showing the working state of an embodiment of this utility model;

[0040] Figure 2 This is a diagram showing the connection relationships between the components in an embodiment of this utility model.

[0041] Figure label:

[0042] 1. First housing; 2. Second housing; 3. Live cable; 4. Third housing; 5. Cable under test; 6. Clock interface. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] The following is combined with Figures 1-2 This invention describes an electrified railway traction return current acquisition device according to an embodiment of the present invention.

[0045] Figure 1 This is a diagram showing the working state of an embodiment of this utility model. Figure 2 This is a diagram showing the connection relationships between the components in an embodiment of this utility model, such as... Figure 1 and Figure 2 As shown, this utility model embodiment provides an electrified railway traction return current acquisition device, including: a first housing 1, a second housing 2, and a third housing 4; the first housing 1 integrates a data collection unit; the second housing 2 is disposed on a live cable 3, and integrates a self-powered unit for inductively extracting power from the live cable 3; at least two third housings 4 are disposed on the cable 5 to be tested, and each third housing 4 has a current acquisition sensor inside for acquiring the current parameters in the cable 5 to be tested; wherein, both the second housing 2 and the third housing 4 are connected to the first housing 1.

[0046] It is understood that by separating the data collection unit, the self-powered unit, and the current acquisition sensor, the embodiments provided by this utility model can be flexibly used at different locations on the traction return line, such as the track connection line, the through ground wire, and the suction line for power extraction. Moreover, the device operates in a temperature range of -40℃ to +80℃, making it suitable for various harsh outdoor environments. It can work and run for a long time, monitor the current distribution of the current return line in real time, and thus determine the working status of the return line.

[0047] In a possible implementation, the first housing 1 uses high-strength sealing materials and a precise structural design to achieve an IP68 dustproof and waterproof rating. It can be directly tied to the trackside using steel clamps or buried underground to meet the requirements of the harsh railway environment.

[0048] In a possible implementation, the current acquisition sensor uses a high-precision Rogowski coil to acquire instantaneous current values ​​in the traction return line. The current acquisition range is 0-1000A, the current detection accuracy is ±0.1%, and the sensing accuracy is less than 1A current value. An integrator circuit and digital compensation are used to eliminate high-frequency phase distortion.

[0049] In a possible implementation, the first housing can be configured to support 5 third housings, meaning that one first housing can connect to 5 third housings. Five current acquisition sensors can simultaneously monitor the current of five cables under test, which greatly improves monitoring efficiency compared to existing technologies.

[0050] According to an embodiment of the present invention, an electrified railway traction return current acquisition device is provided, wherein a live cable 3 passes through a second housing 2, and the second housing 2 is detachably installed on the live cable 3; a test cable 5 passes through a third housing 4, and the third housing 4 is detachably installed on the test cable 5.

[0051] In a possible implementation, the second housing 2 includes two halves hinged on one side, with a through groove provided on the opposite side of each half. The cross-section of the through groove is preferably semi-circular, so that the two halves form a circular through hole after being fastened together, in order to fit the shape of the cable. The cable can pass directly through the center of the coil and can be installed when there is current in the return cable. The second housing 2 is fastened to the live cable 3 in a form not limited to the above structure, thereby achieving a detachable connection with the live cable 3.

[0052] In a possible implementation, the third housing 4 has a similar structure to the second housing 2, and its shape is roughly ring-shaped, frame-shaped, etc. The third housing 4 has an opening in the middle, is sleeved on the cable to be tested 5 and fixed by a buckle, so as to achieve a detachable connection with the cable to be tested 5.

[0053] In a possible implementation, both the second housing 2 and the third housing 4 are waterproof shells that achieve an IP67 dust and water resistance rating, and are snapped onto the exposed cable to meet the requirements of the harsh environment along the railway line.

[0054] like Figure 2 As shown, according to an embodiment of the present invention, an electrified railway traction return current acquisition device includes a data collection unit comprising a controller connected to a current acquisition sensor and a self-powered unit.

[0055] In a possible implementation, the controller primarily uses a low-power MCU chip with power consumption as low as the uW level.

[0056] like Figure 2 As shown, according to an embodiment of the present invention, an electrified railway traction return current acquisition device includes a self-energy harvesting unit comprising: an energy harvester, electromagnetically coupled to a live cable 3, for acquiring electrical energy; and an energy storage unit, connected to the energy harvester, for storing at least a portion of the acquired electrical energy.

[0057] In a possible implementation, the energy harvester extracts energy from the line using electromagnetic coupling to power the return current monitoring system; the energy harvesting coil is made of iron-nickel alloy as the base material, and the properties of iron-nickel alloy enable the energy harvesting sensor to work effectively under low current conditions.

[0058] In a possible implementation, the energy storage device includes a supercapacitor that partially stores the electrical energy harvested by induction for use when the current in the cable is too low; the supercapacitor electrodes are made of activated carbon material, which has a high capacitance value, is chemically stable, has a high storage capacity, and is suitable for long-term use; the electrolyte of the supercapacitor is an organic electrolyte propylene carbonate, which can provide a high operating voltage of 2.7V, suitable for high energy density applications; the diaphragm material of the supercapacitor is made of polypropylene (PP), which has high porosity and good chemical stability.

[0059] like Figure 2 As shown, according to an embodiment of the present invention, an electrified railway traction return current acquisition device includes a data collection unit that further includes a memory connected to a controller, used to locally store the current parameters acquired by the current acquisition sensor, and to mark the characteristics of the data acquired by each current acquisition sensor to distinguish different return current data at different locations.

[0060] In a possible implementation, the memory is used to locally store 64G of current values ​​from the current acquisition sensor, satisfying the data and marking the data from different sensors to distinguish the return current values ​​at different locations; the memory has a reserved interface for locally downloading the acquired data.

[0061] like Figure 2 As shown, according to an embodiment of the present invention, an electrified railway traction return current acquisition device includes a data collection unit that further includes a timer connected to a current acquisition sensor, used to add a timestamp to the current parameters acquired by the current acquisition sensor each time.

[0062] In a possible implementation, the timer is used to provide a clock reference for the system, employing a high-precision temperature-compensated clock chip with an accuracy of 5PPM, and reserving a UART for external clock calibration. Each current parameter collected by the current acquisition sensor is timestamped to find the time basis in event or fault data analysis.

[0063] like Figure 2 As shown, according to an embodiment of the present invention, an electrified railway traction return current acquisition device is provided, wherein the first housing 1 is provided with a clock interface 6, and when the timer malfunctions or is inaccurate, the timer can be calibrated manually.

[0064] like Figure 2 As shown, according to an embodiment of the present invention, an electrified railway traction return current acquisition device includes a data collection unit that further includes a transmitter connected to the controller for transmitting current parameters.

[0065] In a possible implementation, the transmitter sends data to a data analysis backend cloud platform or local server via a 4G network. The transmitter consists of an adaptive 4G module that automatically switches between various frequency bands to adapt to the local environment. It should be understood that, depending on actual needs, the transmitter may also use 5G wireless communication technology.

[0066] like Figure 2 As shown, an electrified railway traction return current acquisition device according to an embodiment of the present utility model further includes: a cloud platform, wirelessly connected to the transmitter; and a local server, connected to the transmitter.

[0067] In a possible implementation, the cloud platform has an interactive interface, and the transmitter uploads data to the cloud platform or a local server according to a set period.

[0068] like Figure 2 As shown in the embodiment of the present invention, an electrified railway traction return current acquisition device is provided, wherein the data collection unit further includes an encryption module, which is connected to the controller and the current acquisition sensor respectively.

[0069] In a possible implementation, the encryption module uses data encryption technology, encrypting the collected return data with AES, generating a data signature using HMAC, and sending the encrypted data and signature to the server via a TLS encrypted channel. Using mature encryption algorithms and low-cost ESP32 hardware, it provides multi-layered data protection and operates stably.

[0070] Furthermore, in some other embodiments of this utility model, when the device is in use: First, a first housing 1 is installed next to the rail, and a second housing 2 and a third housing 4 are respectively connected to the first housing 1 via connecting lines; the second housing 2 is fastened to any live cable to ensure that it can normally draw power; according to the monitoring requirements of the circuit, the number and location of the lines to be monitored are determined, and several third housings 4 are sequentially fastened to the cable 5 to be tested, and the current value of the cable 5 to be tested can be obtained; since the volume of the three housings is small, the installation process is less restricted, and since the second housing 2 and the third housing 4 are detachably connected to the cable, the installation is quick and easy to disassemble, and it has strong portability; the device can realize wireless transmission, avoid laying cables, and reduce installation costs; the device can draw power from the return line, which is more stable in power extraction efficiency than the solar panel power solution, avoids the need for regular maintenance using battery power, can monitor the current status of the current return line in real time, thereby judging the working status of the return line, and can send fault data at any time in case of a fault.

[0071] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A traction return current acquisition device for electrified railways, characterized in that, include: The first housing (1) integrates a data collection unit; The second housing (2) is disposed on the live cable (3). The interior of the second housing (2) is integrated with a self-powered unit for inductively drawing power from the live cable (3). At least two third housings (4) are respectively set on the cable under test (5). The third housing (4) is equipped with a current acquisition sensor to acquire the current parameters in the cable under test (5). The second housing (2) and the third housing (4) are both connected to the first housing (1).

2. The electrified railway traction return current acquisition device according to claim 1, characterized in that, The live cable (3) passes through the second housing (2), and the second housing (2) is detachably connected to the live cable (3); The cable under test (5) passes through the third housing (4), and the third housing (4) is detachably connected to the cable under test (5).

3. The electrified railway traction return current acquisition device according to claim 2, characterized in that, The data aggregation unit includes: The controller is connected to the current acquisition sensor and the self-powered unit.

4. The electrified railway traction return current acquisition device according to claim 3, characterized in that, The self-powered unit includes: An energy harvester is electromagnetically coupled to the live cable (3) to harvest electrical energy; An energy storage device, connected to the energy harvester, is used to store at least a portion of the acquired electrical energy.

5. The electrified railway traction return current acquisition device according to claim 3, characterized in that, The data aggregation unit also includes: A memory, connected to the controller, is used to locally store the current parameters collected by the current acquisition sensor.

6. The electrified railway traction return current acquisition device according to claim 3, characterized in that, The data aggregation unit also includes: A timer, connected to the current acquisition sensor, is used to add a timestamp to each current parameter acquired by the current acquisition sensor.

7. The electrified railway traction return current acquisition device according to claim 6, characterized in that, The first housing (1) is provided with a clock interface (6) for calibrating the timer.

8. The electrified railway traction return current acquisition device according to claim 3, characterized in that, The data aggregation unit also includes: A transmitter, connected to the controller, is used to transmit the current parameters.

9. The electrified railway traction return current acquisition device according to claim 8, characterized in that, Also includes: The cloud platform is connected to the transmitter. A local server is connected to the transmitter.

10. The electrified railway traction return current acquisition device according to any one of claims 3-9, characterized in that, The data aggregation unit also includes: The encryption module is connected to both the controller and the current acquisition sensor.

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