Wireless track circuit earth short test device
By integrating a wireless remote control unit and a Hall sensor, remote operation and data acquisition of the wireless track line grounding short circuit test device are realized, solving the problems of bulky and complex operation of existing DC short circuit test instruments, improving test safety and efficiency, and adapting to the diverse needs of urban rail transit systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY ELECTRIFICATION BUREAU GROUP THIRD ENG
- Filing Date
- 2025-07-02
- Publication Date
- 2026-06-12
AI Technical Summary
Existing DC short-circuit test instruments are bulky, difficult to transport, require long preparation time for short-circuit tests, are complex to operate, have poor anti-interference capabilities, and pose a risk of wiring errors, making it difficult to meet the safety and reliability requirements of urban rail transit systems.
A wireless track line grounding short-circuit test device was designed. It uses a wireless remote control controller unit to remotely control high-voltage circuit breakers and DC grounding circuit breakers. It integrates Hall sensors and portable waveform recorders and is equipped with a power supply module to power each component, realizing remote operation of high-voltage equipment and accurate data acquisition.
It improves the safety and efficiency of testing operations, provides reliable data support, ensures the stability and safety of the testing process, and adapts to the diverse needs of different urban rail transit systems.
Smart Images
Figure CN224354561U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rail transit technology, specifically to a wireless rail line grounding short-circuit testing device. Background Technology
[0002] Rail transit refers to a type of transportation vehicle or system that requires vehicles to run on specific tracks. Urban rail transit line DC short-circuit testing is an experiment simulating a DC short-circuit fault in a DC power supply system. By creating abnormal electrical conditions, it observes the system's response, verifies the stability of related equipment, and obtains important equipment parameters to evaluate the performance of the equipment and protection system. Short-circuit testing can verify the performance of electrical equipment under extreme conditions, ensuring that the equipment can withstand short-circuit impacts in actual operation; it can also verify the sensitivity and stability of the protection system, ensuring that the protection system can function promptly and accurately when a short-circuit fault occurs, thereby preventing equipment damage. Short-circuit tests can detect potential problems in power systems, providing a basis for fault analysis and prevention. They can also provide data support for the design, improvement, and optimization of power systems, helping to enhance system reliability and stability. Furthermore, short-circuit test results help improve the skills of operation and maintenance personnel, enabling them to better understand the operating characteristics of equipment under short-circuit conditions and ensuring the safe operation and maintenance of the power system. To ensure the stable operation of the power supply system after the subway line opens, a 1500V DC short-circuit test is required on the 1500V contact network before trial operation to verify and evaluate the performance of the equipment and protection system. Therefore, a DC short-circuit test instrument has been specially developed.
[0003] The shortcomings of existing technologies are as follows: Existing DC short-circuit test instruments are bulky, difficult to transport, require a long preparation time for short-circuit tests, require a large number of operators and assistants, have many instrument parts, complicated wiring, poor anti-interference ability, and there is a risk that wiring errors will affect the test progress. Moreover, there are shortcomings in terms of time and manpower costs for the processing and storage of test data, as well as personnel safety. They are difficult to meet the high requirements of safety and reliability of urban rail transit systems, and cannot well adapt to the diverse needs of different urban rail transit systems.
[0004] Therefore, a wireless track line grounding short-circuit test device is needed to solve the above problems. Utility Model Content
[0005] To solve the above problems, this utility model provides a wireless track line grounding short circuit test device, which is achieved through the following technical solution.
[0006] A wireless track line grounding short-circuit testing device includes a parallel DC line and a running rail, with the running rail serving as the grounding line. The DC line is connected to a positive busbar via a power supply line, which supplies a DC 1500V test voltage. Several normally open high-voltage circuit breakers are installed on the power supply line. The DC line is connected to the running rail via a short-circuit line, which is equipped with a normally open DC grounding circuit breaker.
[0007] The wireless track line grounding short circuit test device also includes:
[0008] The high-voltage circuit breaker wireless controller unit is used to receive action signals and, after receiving the action signals, control the high-voltage circuit breaker to close and delay the opening.
[0009] The wireless controller unit for the DC grounding circuit breaker is used to receive action signals and, after receiving the action signals, control the DC grounding circuit breaker to close.
[0010] The wireless remote control unit is connected to the transceiver end of the remote control and is used to synchronously transmit the operation signals of the high-voltage circuit breaker wireless control unit and the DC grounding circuit breaker wireless control unit, and to receive feedback communication status.
[0011] As a further embodiment of this utility model, it also includes a Hall sensor and a portable waveform recorder. The Hall sensor is used to collect transient high current signals of the short-circuited circuit. The current and voltage input terminals of the portable waveform recorder are respectively connected to the current and voltage output terminals of the Hall sensor to collect the peak curve waveforms of the short-circuit current and voltage.
[0012] As a further embodiment of this utility model, it also includes a power supply module, which is used to supply power to the high-voltage circuit breaker wireless controller unit, the DC grounding circuit breaker wireless controller unit, the wireless remote control controller unit, the Hall sensor and the portable waveform recorder.
[0013] The high-voltage circuit breaker wireless controller unit is powered by a built-in 12.6VDC-2.2AH lithium battery.
[0014] The wireless controller unit of the DC grounding circuit breaker is powered by an external 12.6V-20AH lead-acid battery, and the voltage is converted to the required 110VDC-3A through a micro inverter and transformer to drive the DC grounding circuit breaker to close.
[0015] The wireless remote control unit is powered by a built-in 12.6VDC-2.2AH lithium battery;
[0016] The Hall sensor and portable waveform recorder are powered by a built-in 12V lithium battery.
[0017] As a further embodiment of this utility model, the high-voltage circuit breaker wireless controller unit and the DC grounding circuit breaker wireless controller unit achieve wireless communication with the wireless remote control controller unit through a 433M communication frequency.
[0018] As a further embodiment of this utility model, the high-voltage circuit breaker wireless controller unit is equipped with six switching signals and can be set with a delay time. After receiving the action signal, it outputs normally closed contact signals through the six switching signals to control the high-voltage circuit breaker to close. After the delay time, the six switching signals output normally open contact signals to control the high-voltage circuit breaker to open.
[0019] The beneficial effects of this utility model are as follows:
[0020] 1. The wireless track line grounding short circuit test device proposed in this patent realizes remote control of high voltage circuit breakers and DC grounding circuit breakers through a wireless remote control controller unit, which effectively avoids test personnel from directly contacting high voltage equipment and significantly improves the safety and efficiency of test operations.
[0021] 2. The device integrates a Hall sensor and a portable waveform recorder, which can accurately acquire transient high current signals in short-circuit circuits and record the peak waveforms of short-circuit current and voltage, providing reliable data support for the analysis and evaluation of test results.
[0022] 3. The device is equipped with a power module to provide a stable power supply for each component, ensuring the normal operation of each component during the test. In particular, key components such as the high-voltage circuit breaker wireless controller unit and the DC grounding circuit breaker wireless controller unit are powered by built-in or external batteries, ensuring reliable operation in complex environments. Attached Figure Description
[0023] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 Wiring diagram of the wireless track line grounding short circuit test device during operation;
[0025] Figure 2 Power supply diagram of the power module.
[0026] The attached figures are labeled as follows:
[0027] 1. DC line, 2. Track, 3. Power supply line, 4. Positive busbar, 5. High voltage circuit breaker, 6. Short-circuit line, 7. DC grounding circuit breaker, 8. High voltage circuit breaker wireless controller unit, 9. DC grounding circuit breaker wireless controller unit, 10. Wireless remote control controller unit, 11. Remote controller, 12. Hall sensor, 13. Portable waveform recorder, 14. Power module. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0029] This utility model has the following three specific embodiments.
[0030] Example 1
[0031] The wireless track line grounding short circuit test device includes a parallel DC line 1 and a walking rail 2, with the walking rail 2 serving as the grounding line. The DC line 1 is connected to the positive bus 4 through the power supply line 3, and a DC 1500V test voltage is supplied through the positive bus 4. Several normally open high-voltage circuit breakers 5 are installed on the power supply line 3. The DC line 1 and the walking rail 2 are connected through a short-circuit line 6, and a normally open DC grounding circuit breaker 7 is installed on the short-circuit line 6.
[0032] The wireless track line grounding short circuit test device also includes:
[0033] The high-voltage circuit breaker wireless controller unit 8 is used to receive action signals and, after receiving the action signals, control the high-voltage circuit breaker 5 to close and delay the opening.
[0034] The wireless controller unit 9 for the DC grounding circuit breaker is used to receive the action signal and, after receiving the action signal, control the DC grounding circuit breaker 7 to close.
[0035] The wireless remote control unit 10 is connected to the transceiver terminal of the remote controller 11 and is used to synchronously transmit the operation signals of the high-voltage circuit breaker wireless controller unit 8 and the DC grounding circuit breaker wireless controller unit 9, and to receive feedback communication status.
[0036] In this embodiment, as Figures 1-2As shown, pressing the start button on the remote control 11 synchronously transmits the operation signals of the high-voltage circuit breaker wireless controller unit 8 and the DC grounding circuit breaker wireless controller unit 9 through the wireless remote control unit 10. At the same time, the wireless remote control unit 10 determines whether the signal transmission is normal by receiving feedback communication status.
[0037] After receiving the action signal, the high-voltage circuit breaker wireless controller unit 8 controls the high-voltage circuit breaker 5 to close, and the positive bus 4 supplies a DC 1500V test voltage to the DC line 1. After receiving the action signal, the wireless remote control unit 10 controls the DC grounding circuit breaker 7 to close. At this time, the DC line 1 is short-circuited with the travel rail 2.
[0038] The high-voltage circuit breaker wireless controller unit 8 is set with a delay time. After the delay time has elapsed, it controls the high-voltage circuit breaker 5 to open.
[0039] Example 2
[0040] It also includes a Hall sensor 12 and a portable waveform recorder 13. The Hall sensor 12 is used to collect the transient high current signal of the short-circuit line 6. The current and voltage input terminals of the portable waveform recorder are connected to the current and voltage output terminals of the Hall sensor 12, respectively, to collect the peak curve waveforms of the short-circuit current and voltage.
[0041] Preferably, it also includes a power supply module 14, which is used to power the high-voltage circuit breaker wireless controller unit 8, the DC grounding circuit breaker wireless controller unit 9, the wireless remote control controller unit 10, the Hall sensor 12 and the portable waveform recorder 13.
[0042] The high-voltage circuit breaker wireless controller unit 8 is powered by a built-in 12.6VDC-2.2AH lithium battery;
[0043] The wireless controller unit 9 of the DC grounding circuit breaker is powered by an external 12.6V-20AH lead-acid battery, and the voltage is converted to the required 110VDC-3A through a micro inverter and transformer to drive the DC grounding circuit breaker to close.
[0044] The wireless remote control unit 10 is powered by a built-in 12.6VDC-2.2AH lithium battery;
[0045] The Hall sensor 12 and the portable waveform recorder 13 are powered by a built-in 12V lithium battery.
[0046] Preferably, the high-voltage circuit breaker wireless controller unit 8 and the DC grounding circuit breaker wireless controller unit 9 communicate wirelessly with the wireless remote control controller unit 10 via a 433MHz communication frequency.
[0047] like Figures 1-2As shown, the high-voltage circuit breaker wireless controller unit 8, the DC grounding circuit breaker wireless controller unit 9, the wireless remote control controller unit 10, the Hall sensor 12, and the portable waveform recorder 13 are powered by the power module 14.
[0048] Hall sensor 12 collects transient high current signals from short-circuited line 6 and transmits them to portable waveform recorder 13 to generate current and voltage waveforms. Portable waveform recorder 13 is equipped with a display screen for displaying waveforms.
[0049] The portable waveform recorder 13 has a reserved IoT interface, which can realize data upload and interaction, and facilitate data sharing and communication between different lines.
[0050] The high-voltage circuit breaker wireless controller unit 8 and the DC grounding circuit breaker wireless controller unit 9 communicate wirelessly with the wireless remote control controller unit 10 via a 433MHz communication frequency. Each unit is equipped with an external antenna, and the communication distance is greater than 300 meters in the absence of obstructions.
[0051] Example 3
[0052] The high-voltage circuit breaker wireless controller unit 8 is equipped with six switching signals and can set a delay time. After receiving the action signal, it outputs normally closed contact signals through the six switching signals to control the high-voltage circuit breaker 5 to close. After the delay time, the six switching signals output normally open contact signals to control the high-voltage circuit breaker 5 to open.
[0053] In this embodiment, as Figure 1 As shown, the high-voltage circuit breaker wireless controller unit 8 displays the delay time setting via a 4-digit digital tube. The delay time ranges from 000 to 999ms. The delay time is set using the plus, minus, and displacement keys on the unit. The standby and stop states are set using the start / stop button. Upon receiving an action signal, the unit sends six normally closed contact signals to control the high-voltage circuit breaker 5 to close. After the delay time, it sends six normally open contact signals to control the high-voltage circuit breaker 5 to open.
[0054] The switch signal has six channels, and up to six high-voltage circuit breakers 5 can be set as needed. In this application, two high-voltage circuit breakers 5 are specifically set.
[0055] The working principle of this utility model is as follows:
[0056] 1. Arrange each component in a suitable position according to the design requirements and make electrical connections.
[0057] 2. Set the delay time of the high-voltage circuit breaker wireless controller unit 8.
[0058] 3. Press the start button on the remote control 11 to send action signals to the high-voltage circuit breaker wireless controller unit 8 and the DC grounding circuit breaker wireless controller unit 9, and ensure normal signal transmission by feedback communication status.
[0059] 4. After receiving the action signal, the wireless controller unit 9 of the DC grounding circuit breaker and the wireless controller unit 8 of the high-voltage circuit breaker control the high-voltage circuit breaker 5 and the DC grounding circuit breaker 7 to close simultaneously, simulating the occurrence of a DC short circuit fault. The Hall sensor 12 and the portable waveform recorder 13 work to collect data. After a delay, the wireless controller unit 8 of the high-voltage circuit breaker controls the high-voltage circuit breaker 5 to open and cut off the test voltage.
[0060] 5. After the test, view and save the recorded data using the portable waveform recorder 13, and upload the data using the reserved IoT interface to achieve data sharing and communication.
[0061] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. The selection and detailed description of these embodiments in this specification are intended to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.
Claims
1. A wireless track line grounding short-circuit test device, comprising a parallel DC line and a running rail, with the running rail serving as the grounding line, characterized in that, The DC line is connected to the positive busbar via a power supply line, which supplies a DC 1500V test voltage. Several normally open high-voltage circuit breakers are installed on the power supply line. The DC line is connected to the travel rail via a short-circuit line, which is equipped with a normally open DC grounding circuit breaker. The wireless track line grounding short circuit test device also includes: The high-voltage circuit breaker wireless controller unit is used to receive action signals and, after receiving the action signals, control the high-voltage circuit breaker to close and delay the opening. The wireless controller unit for the DC grounding circuit breaker is used to receive action signals and, after receiving the action signals, control the DC grounding circuit breaker to close. The wireless remote control unit is connected to the transceiver end of the remote control and is used to synchronously transmit the operation signals of the high-voltage circuit breaker wireless control unit and the DC grounding circuit breaker wireless control unit, and to receive feedback communication status.
2. The wireless track line grounding short-circuit test device according to claim 1, characterized in that, It also includes a Hall sensor and a portable waveform recorder. The Hall sensor is used to collect transient high current signals of short-circuited circuits. The current and voltage input terminals of the portable waveform recorder are respectively connected to the current and voltage output terminals of the Hall sensor to collect the peak curve waveforms of short-circuit current and voltage.
3. The wireless track line grounding short-circuit test device according to claim 2, characterized in that, It also includes a power module for supplying power to the high-voltage circuit breaker wireless controller unit, the DC grounding circuit breaker wireless controller unit, the wireless remote control controller unit, the Hall sensor, and the portable waveform recorder. The high-voltage circuit breaker wireless controller unit is powered by a built-in 12.6VDC-2.2AH lithium battery. The wireless controller unit of the DC grounding circuit breaker is powered by an external 12.6V-20AH lead-acid battery, and the voltage is converted to the required 110VDC-3A through a micro inverter and transformer to drive the DC grounding circuit breaker to close. The wireless remote control unit is powered by a built-in 12.6VDC-2.2AH lithium battery; The Hall sensor and portable waveform recorder are powered by a built-in 12V lithium battery.
4. The wireless track line grounding short-circuit test device according to claim 1, characterized in that, The high-voltage circuit breaker wireless controller unit and the DC grounding circuit breaker wireless controller unit communicate wirelessly with the wireless remote control controller unit via a 433MHz communication frequency.
5. The wireless track line grounding short-circuit test device according to claim 1, characterized in that, The high-voltage circuit breaker wireless controller unit is equipped with six switching signals and can be set with a delay time. After receiving the action signal, it outputs normally closed contact signals through the six switching signals to control the high-voltage circuit breaker to close. After the delay time, the six switching signals output normally open contact signals to control the high-voltage circuit breaker to open.