Train high-voltage component monitoring device

Abstract

The invention relates to a train high-voltage component monitoring device. The train high-voltage component monitoring device comprises a signal acquisition module and a high-voltage component monitoring module, the signal acquisition module comprises an acquisition sensor and an acquisition circuit, the acquisition sensor is connected with the input end of the acquisition circuit, and the output end of the acquisition circuit is connected with the input end of the high-voltage monitoring module; the acquisition sensor monitors the connected tested high-voltage component to obtain a tested signal; the acquisition circuit detects whether the acquisition sensor successfully obtains the detected signal, sends an alarm signal when the acquisition sensor does not successfully obtain the detected signal, and sends signal data to the high-voltage component monitoring module when the acquisition sensor successfully obtains the detected signal; and the high-voltage component monitoring module detects the signal data, and when the signal data exceeds a preset monitoring threshold value, fault early warning information is sent out. Full coverage of state monitoring of the high-voltage component of the train high-voltage main circuit is achieved, state signals of the high-voltage component can be comprehensively collected, and missing detection of the state signals of the high-voltage component is avoided.

Description

Technical Field

[0001] This disclosure relates to the field of train high-voltage monitoring technology, and in particular to a train high-voltage component monitoring device. Background Technology

[0002] During train operation, current is collected by the pantograph on the roof and then transmitted to the traction drive system through a series of high-voltage devices, including circuit breakers, instrument transformers, surge arresters, voltage cables, and traction transformers. The traction motor converts the electrical energy into mechanical energy, driving the train. The state of the high-voltage system is crucial to the safe and stable operation of the train, and the normal operation of high-voltage components such as main circuit breakers, traction transformers, and instrument transformers is the foundation for ensuring the stable operation of the high-voltage system. In particular, if a fault occurs in a critical high-voltage component and is not detected and eliminated in time, it can lead to train delays or even safety accidents. Therefore, real-time status monitoring of critical high-voltage components is of great significance.

[0003] However, current systems lack the capability to monitor all components of a train's high-voltage main circuit in real time. Traditional monitoring devices only monitor individual high-voltage components independently, leading to problems such as multiple sampling of system voltage / current signals, low information sharing, and increased management and maintenance costs due to excessive system complexity. Furthermore, if multiple high-voltage components are monitored simultaneously, comprehensive monitoring may be impossible due to sensor malfunctions. Summary of the Invention

[0004] This disclosure provides a monitoring device for high-voltage components in trains.

[0005] A high-voltage component monitoring device for trains includes: a signal acquisition module and a high-voltage component monitoring module;

[0006] The signal acquisition module includes multiple acquisition sensors and acquisition circuits. Each acquisition sensor is connected to the input terminal of the acquisition circuit, and the output terminal of the acquisition circuit is connected to the input terminal of the high-voltage monitoring module.

[0007] Each of the aforementioned acquisition sensors is used to connect to a high-voltage component under test, and each of the aforementioned acquisition sensors is used to monitor the connected high-voltage component under test and obtain the measured signal of the high-voltage component under test;

[0008] The acquisition circuit is used to detect whether the acquisition sensor has successfully obtained the measured signal. When the acquisition sensor fails to obtain the measured signal, an alarm signal is issued. When the measured signal is successfully obtained, the signal data corresponding to the measured signal is sent to the high-voltage component monitoring module.

[0009] The high-voltage component monitoring module is used to detect signal data, and when the signal data exceeds a preset monitoring threshold, it issues a fault warning.

[0010] In one embodiment, the acquisition circuit includes multiple sensor signal judgment loops, each acquisition sensor is connected to the input terminal of a sensor signal judgment loop, and the output terminal of each sensor signal judgment loop is connected to the input terminal of the high voltage monitoring module.

[0011] The sensor signal judgment circuit is used to detect whether the acquisition sensor has successfully obtained the measured signal. When the acquisition sensor fails to obtain the measured signal, an alarm signal is issued.

[0012] In one embodiment, the acquisition circuit further includes a signal processing module, the output terminal of each sensor signal judgment loop is connected to the input terminal of the signal processing module, and the output terminal of the signal processing module is connected to the input terminal of the high voltage monitoring module;

[0013] The signal processing module is used to preprocess and perform analog-to-digital conversion on the measured signal when the acquisition sensor successfully obtains the measured signal, to obtain signal data, and to transmit the signal data to the high-voltage component monitoring module.

[0014] In one embodiment, the signal processing module includes a preprocessing circuit and an analog-to-digital conversion circuit. The input terminal of the preprocessing circuit is connected to the sensor signal judgment loop, the output terminal of the preprocessing circuit is connected to the input terminal of the analog-to-digital conversion circuit, and the output terminal of the analog-to-digital conversion circuit is connected to the input terminal of the high-voltage component monitoring module.

[0015] The preprocessing circuit is used to preprocess the measured signal when the acquisition sensor successfully obtains the measured signal;

[0016] The analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the preprocessed test signal to obtain signal data, and then transmit the signal data to the high-voltage component monitoring module.

[0017] In one embodiment, the preprocessing circuit includes an amplification circuit for amplifying the measured signal when the acquisition sensor successfully obtains the measured signal.

[0018] In one embodiment, the preprocessing circuit includes a filtering circuit, which is used to filter the measured signal when the acquisition sensor successfully obtains the measured signal.

[0019] In one embodiment, the signal acquisition module further includes a pantograph status detection unit, which is connected to the input terminal of the signal processing module;

[0020] The pantograph status detection unit is used to obtain the time when the pantograph raises the pantograph and the time when the pantograph completes raising; to obtain the time when the pantograph lowers the pantograph and the time when the pantograph completes lowering; and to obtain the time when the pantograph lowers the pantograph and the time when the pantograph completes lowering. The signal processing module then sends the time when the pantograph raises the pantograph, the time when the pantograph raises the pantograph, the time when the pantograph lowers the pantograph, and the time when the pantograph lowers the pantograph to the high-voltage component monitoring module.

[0021] The high-voltage component monitoring module is used to acquire the time when the pantograph raising command is issued, the time when the pantograph raising is completed, the time when the pantograph lowering command is issued, and the time when the pantograph lowering is completed. It calculates the pantograph raising time using the time when the pantograph raising command is issued and the time when the pantograph lowering is completed, and calculates the pantograph lowering time using the time when the pantograph lowering command is issued and the time when the pantograph lowering is completed. It also checks whether the pantograph raising time and the pantograph lowering time meet the pantograph raising time and pantograph lowering time indicators.

[0022] In one embodiment, the pantograph status detection unit includes a pantograph indicator signal circuit, a pantograph status feedback circuit, and a timer. The pantograph indicator signal circuit and the pantograph status feedback circuit are respectively connected to the timer, and the timer is connected to the signal processing module.

[0023] The timer is used to obtain the time of issuance of the pantograph raising command when the pantograph indicator signal circuit issues the pantograph raising command, to obtain the time of completion of the pantograph raising command when the pantograph status feedback circuit receives the pantograph raising completion information, to obtain the time of issuance of the pantograph lowering command when the pantograph indicator signal circuit issues the pantograph lowering command, and to obtain the time of completion of the pantograph lowering command when the pantograph status feedback circuit receives the pantograph lowering completion information.

[0024] In one embodiment, the timer includes a first timer and a second timer, the pantograph indicator signal circuit is connected to the first timer, the pantograph status feedback circuit is connected to the second timer, and the first timer and the second timer are connected to the signal processing module;

[0025] The first timer is used to obtain the time when the pantograph raising command is issued by the pantograph indicator signal circuit, and to obtain the time when the pantograph raising is completed by the pantograph status feedback circuit.

[0026] The second timer is used to obtain the time when the pantograph lowering command is issued by the pantograph indicator signal circuit, and to obtain the time when the pantograph lowering is completed when the pantograph status feedback circuit receives the lowering completion information.

[0027] In one embodiment, the high-voltage component monitoring module includes a processing module and an early warning module. The processing module detects whether the signal data exceeds the preset monitoring threshold. When the signal data exceeds the preset monitoring threshold, the early warning module issues a fault warning. The signal acquisition module collects the status signals of each high-voltage component on the train, and the high-voltage component monitoring module detects and judges these status signals to determine whether the high-voltage components are operating normally. This achieves full coverage of high-voltage component status monitoring in the train's high-voltage main circuit. Furthermore, the module detects whether a signal is successfully detected during the acquisition process to determine whether the acquisition sensor is operating normally. This ensures accurate and comprehensive acquisition of high-voltage component status signals, avoiding missed detections and improving the accuracy of high-voltage component status monitoring. Attached Figure Description

[0028] The present disclosure will be described in more detail below based on embodiments and with reference to the accompanying drawings:

[0029] Figure 1A A circuit principle logic block diagram of a train high-voltage component monitoring device provided in an embodiment of this disclosure;

[0030] Figure 1B A circuit principle logic block diagram of a train high-voltage component monitoring device provided in another embodiment of this disclosure;

[0031] Figure 2 The circuit principle logic block diagram of a train high-voltage component monitoring device provided in another embodiment of this disclosure.

[0032] In the accompanying drawings, the same parts are referred to by the same reference numerals, and the drawings are not drawn to scale. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of this disclosure, and to fully understand and implement the process of how this disclosure applies technical means to solve technical problems and achieve corresponding technical effects, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, not all embodiments. The embodiments of this disclosure and the various features within them can be combined with each other without conflict, and the resulting technical solutions are all within the protection scope of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort should fall within the protection scope of this disclosure.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] Example 1

[0036] Figure 1A and Figure 1B This is a logic block diagram of a train high-voltage component monitoring device provided in an embodiment of this disclosure. Figure 1A and Figure 1B As shown, a high-voltage component monitoring device for trains includes: a signal acquisition module and a high-voltage component monitoring module;

[0037] The signal acquisition module includes multiple acquisition sensors and acquisition circuits. Each acquisition sensor is connected to the input terminal of the acquisition circuit, and the output terminal of the acquisition circuit is connected to the input terminal of the high-voltage monitoring module.

[0038] Each of the aforementioned acquisition sensors is used to connect to a high-voltage component under test, and each of the aforementioned acquisition sensors is used to monitor the connected high-voltage component under test and obtain the measured signal of the high-voltage component under test;

[0039] The acquisition circuit is used to detect whether the acquisition sensor has successfully obtained the measured signal. When the acquisition sensor fails to obtain the measured signal, an alarm signal is issued. When the measured signal is successfully obtained, the signal data corresponding to the measured signal is sent to the high-voltage component monitoring module.

[0040] The high-voltage component monitoring module is used to detect signal data, and when the signal data exceeds a preset monitoring threshold, it issues a fault warning.

[0041] In this embodiment, the acquisition sensor is used to acquire signals such as current and voltage of the high-voltage component under test. The signal is processed by the signal processing module and transmitted to the high-voltage component monitoring module, which detects the signal to determine whether there is a fault in the high-voltage component under test.

[0042] In one embodiment, the high-voltage component under test includes a surge arrester, a current transformer, a voltage transformer, a main circuit breaker, and a traction transformer. Each high-voltage component under test is connected to a data acquisition sensor, which can be a current sensor, a voltage sensor, or a current transformer. For example, if the high-voltage component under test is a surge arrester, the corresponding data acquisition sensor is a micro-current sensor and an impulse current sensor; if the high-voltage component under test is a current transformer, the corresponding data acquisition sensor is a current sensor; if the high-voltage component under test is a voltage transformer, the corresponding data acquisition sensor is a zero-flux current transformer; if the high-voltage component under test is a main circuit breaker, the corresponding data acquisition sensor is a current sensor; and if the high-voltage component under test is a traction transformer, the corresponding data acquisition sensor is a current sensor, a micro-current sensor, and a high-frequency current sensor. Different high-voltage components require different signal types for detection; therefore, different data acquisition sensors are used. For details on different high-voltage components under test and their corresponding sensor types, please refer to [link to relevant documentation]. Figure 2 And Table 1 of this article.

[0043] To enable timely alarms from the train's high-voltage component monitoring device, in one embodiment, such as... Figure 1A As shown, the signal processing module communicates with the high-voltage component monitoring module via Ethernet (ETH), and the high-voltage component monitoring module is connected to the monitoring platform via Ethernet. For example, the monitoring platform has a display screen, which is installed in the driver's cab of the train.

[0044] In this embodiment, the high-voltage component judges the signal data collected by the signal acquisition module. If the signal exceeds a preset monitoring threshold, a fault warning is issued. This allows for timely detection of faults in the high-voltage component. It is worth noting that "exceeding the preset monitoring threshold" refers to either being greater than or less than the preset monitoring threshold.

[0045] In this embodiment, the high-voltage component monitoring module is used to send signal data to the monitoring platform, allowing the driver in the cab to view the operating status of each tested high-voltage component in real time. Furthermore, the high-voltage component monitoring module is also used to send fault warning information to the monitoring platform when the monitored index parameters exceed the preset monitoring parameters and reach a preset threshold. This ensures that the driver in the cab can receive fault warning information promptly.

[0046] In one embodiment, such as Figure 1AAs shown, the high-voltage component monitoring module is also connected to the vehicle-to-ground wireless transmission device via Ethernet (ETH). The vehicle-to-ground wireless transmission device is connected to the ground operation and maintenance platform via a wireless network. The high-voltage component monitoring module is also used to send signal data to the ground operation and maintenance platform through the vehicle-to-ground wireless transmission device. In addition, when the monitored index parameters exceed the preset monitoring parameters and reach the preset threshold, it sends a fault warning information to the ground operation and maintenance platform. In this way, the operation and maintenance personnel of the ground operation and maintenance platform can also check the working status of each high-voltage component of the train in a timely manner and obtain fault information in a timely manner.

[0047] In the above embodiments, the status signals of each high-voltage component on the train are collected by the signal acquisition module, and the status signals are detected and judged by the high-voltage component monitoring module to determine whether the high-voltage component is working normally. This achieves full coverage of the status monitoring of the high-voltage components in the high-voltage main circuit of the train. In addition, the system detects whether the signal is successfully detected during the acquisition process to determine whether the acquisition sensor is working normally. This enables accurate and comprehensive acquisition of the status signals of the high-voltage components, avoids missing the status signals of the high-voltage components, and improves the accuracy of the status monitoring of the high-voltage components.

[0048] In one embodiment, the acquisition circuit includes multiple sensor signal judgment loops. Each acquisition sensor is connected to the input terminal of one of the sensor signal judgment loops, and the output terminal of each sensor signal judgment loop is connected to the input terminal of the high-voltage monitoring module. The sensor signal judgment loop is used to detect whether the acquisition sensor has successfully acquired the measured signal. When the acquisition sensor fails to acquire the measured signal, an alarm signal is issued.

[0049] In one embodiment, the acquisition circuit further includes a signal processing module, wherein the output terminal of each sensor signal judgment circuit is connected to the input terminal of the signal processing module, and the output terminal of the signal processing module is connected to the input terminal of the high-voltage monitoring module; the signal processing module is used to preprocess and perform analog-to-digital conversion on the measured signal when the acquisition sensor successfully obtains the measured signal to obtain signal data, and transmit the signal data to the high-voltage component monitoring module.

[0050] In one embodiment, the acquisition circuit includes multiple sensor signal judgment loops and a signal processing module. Each acquisition sensor is connected to the input terminal of a sensor signal judgment loop, the output terminal of each sensor signal judgment loop is connected to the input terminal of the signal processing module, and the output terminal of the signal processing module is connected to the input terminal of the high-voltage monitoring module.

[0051] The sensor signal judgment circuit is used to detect whether the acquisition sensor has successfully obtained the measured signal. When the acquisition sensor fails to obtain the measured signal, an alarm signal is issued.

[0052] The signal processing module is used to preprocess and perform analog-to-digital conversion on the measured signal when the acquisition sensor successfully obtains the measured signal, to obtain signal data, and to transmit the signal data to the high-voltage component monitoring module.

[0053] In one embodiment, such as Figure 1A As shown, the output of the signal processing module is connected to the input of the high-voltage monitoring module via Ethernet (ETH).

[0054] In this embodiment, a sensor signal judgment circuit is set up. A sensor signal judgment circuit is set up for each acquisition sensor. This sensor signal judgment circuit can also be called a sensor self-test circuit. It is used to detect whether the acquisition sensor has acquired a signal. When the acquisition sensor fails to detect a signal from the high voltage component under test, the sensor signal judgment circuit issues an alarm signal to promptly detect whether the acquisition sensor is working properly.

[0055] In the above embodiments, the status signals of each high-voltage component on the train are collected by the signal acquisition module, and the status signals are detected and judged by the high-voltage component monitoring module to determine whether the high-voltage component is working normally. This achieves full coverage of the status monitoring of the high-voltage components in the high-voltage main circuit of the train. Furthermore, by setting up a sensor signal judgment loop to determine whether the acquisition sensor is working normally, the status signals of the high-voltage components can be collected accurately and comprehensively, avoiding missed detection of the status signals of the high-voltage components, thereby improving the accuracy of the status monitoring of the high-voltage components.

[0056] Example 2

[0057] Based on the above embodiments, in this embodiment, as follows: Figure 2 As shown, the signal acquisition module also includes a pantograph status detection unit, which is connected to the input terminal of the signal processing module;

[0058] The pantograph status detection unit is used to obtain the time when the pantograph raises the pantograph and the time when the pantograph completes raising; to obtain the time when the pantograph lowers the pantograph and the time when the pantograph completes lowering; and to obtain the time when the pantograph lowers the pantograph and the time when the pantograph completes lowering. The signal processing module then sends the time when the pantograph raises the pantograph, the time when the pantograph raises the pantograph, the time when the pantograph lowers the pantograph, and the time when the pantograph lowers the pantograph to the high-voltage component monitoring module.

[0059] The high-voltage component monitoring module is used to acquire the time when the pantograph raising command is issued, the time when the pantograph raising is completed, the time when the pantograph lowering command is issued, and the time when the pantograph lowering is completed. It calculates the pantograph raising time using the time when the pantograph raising command is issued and the time when the pantograph lowering is completed, and calculates the pantograph lowering time using the time when the pantograph lowering command is issued and the time when the pantograph lowering is completed. It also checks whether the pantograph raising time and the pantograph lowering time meet the pantograph raising time and pantograph lowering time indicators.

[0060] In this embodiment, the time when the pantograph raising command is issued refers to the moment when the command is sent to the pantograph to raise it, and the time when the pantograph raising is completed refers to the moment when the pantograph raising is completed and the feedback status is updated. Similarly, the time when the pantograph lowering command is issued refers to the moment when the command is sent to the pantograph to lower it, and the time when the pantograph lowering is completed refers to the moment when the pantograph lowering is completed and the feedback status is updated. Thus, the pantograph raising time can be calculated using the difference between the time when the pantograph raising command is issued and the time when the pantograph raising is completed. This pantograph raising time is the duration of the pantograph raising. Similarly, the pantograph lowering time can be calculated using the difference between the time when the pantograph lowering command is issued and the time when the pantograph lowering is completed. This pantograph lowering time is the duration of the pantograph lowering.

[0061] The pantograph raising and lowering time indicators are the pantograph raising and lowering times during normal operation, respectively. If the pantograph raising time is outside the preset range of the pantograph raising time indicator, the pantograph raising is determined to be abnormal. If the pantograph lowering time is outside the preset range of the pantograph lowering time indicator, the pantograph raising is determined to be abnormal.

[0062] For example: the monitoring module receives the bow-raising command at time t1 and the bow-raising completion time t2, the bow-lowering command at time t3 and the bow-lowering completion time t4, and calculates the bow-raising completion time T. 升弓 = t2-t1, the time T for bow descent to be completed 降弓 =t4-t3, T 升弓 and T 降弓 This serves as an indicator for judging whether the pantograph is raised and lowered normally.

[0063] In this embodiment, the pantograph's operation is detected by monitoring the time of its raising and lowering.

[0064] Example 3

[0065] To further accurately obtain the pantograph raising and lowering times, based on the above embodiments, in this embodiment, as follows: Figure 2 As shown, the pantograph status detection unit includes a pantograph indicator signal circuit, a pantograph status feedback circuit, and a timer. The pantograph indicator signal circuit and the pantograph status feedback circuit are respectively connected to the timer, and the timer is connected to the signal processing module.

[0066] The timer is used to obtain the time of issuance of the pantograph raising command when the pantograph indicator signal circuit issues the pantograph raising command, to obtain the time of completion of the pantograph raising command when the pantograph status feedback circuit receives the pantograph raising completion information, to obtain the time of issuance of the pantograph lowering command when the pantograph indicator signal circuit issues the pantograph lowering command, and to obtain the time of completion of the pantograph lowering command when the pantograph status feedback circuit receives the pantograph lowering completion information.

[0067] In this embodiment, the pantograph indicator signal circuit is... Figure 2 The pantograph raising / lowering command signal processing circuit and the pantograph status feedback circuit are as follows: Figure 2 The pantograph raising / lowering status feedback signal processing circuit, specifically, the pantograph indicator signal circuit and the pantograph status feedback circuit are respectively connected to the pantograph, specifically, as follows: Figure 2 As shown, the pantograph is connected to the train's CCU (Central Control Unit). The CCU is connected to both the pantograph indicator signal circuit and the pantograph status feedback circuit. The pantograph indicator signal circuit sends a raising command to the pantograph through the CCU, and the CCU controls the pantograph to raise. The pantograph indicator signal circuit also sends a lowering command to the pantograph through the CCU, and the CCU controls the pantograph to lower. After the pantograph has raised, the CCU detects this and feeds back this status to the pantograph status feedback circuit. After the pantograph has lowered, the CCU detects this and feeds back this status to the pantograph status feedback circuit. When the pantograph indicator signal circuit issues a raising or lowering command, a timer obtains the time of the command issuance. Similarly, when the pantograph status feedback circuit receives feedback from the CCU that the raising or lowering of the pantograph is complete, the timer also obtains the corresponding time. By combining the pantograph indicator signal circuit, the pantograph status feedback circuit, and the timer, the timing of pantograph raising and lowering can be accurately obtained, thereby accurately calculating the raising and lowering times.

[0068] Example 4

[0069] To further accurately obtain the pantograph raising and lowering times, based on the above embodiments, in this embodiment, as follows: Figure 2 As shown, the timer includes a first timer and a second timer. The pantograph indicator signal circuit is connected to the first timer, the pantograph status feedback circuit is connected to the second timer, and the first timer and the second timer are connected to the signal processing module.

[0070] The first timer is used to obtain the time when the pantograph raising command is issued by the pantograph indicator signal circuit, and to obtain the time when the pantograph raising is completed by the pantograph status feedback circuit.

[0071] The second timer is used to obtain the time when the pantograph lowering command is issued by the pantograph indicator signal circuit, and to obtain the time when the pantograph lowering is completed when the pantograph status feedback circuit receives the lowering completion information.

[0072] In this embodiment, a first timer is used to time the moment the pantograph raising command is issued and the moment the pantograph raising is completed, respectively. A second timer is used to time the moment the pantograph lowering command is issued and the moment the pantograph lowering is completed, respectively. This allows for separate timing of the pantograph raising and lowering processes, thereby enabling more accurate acquisition of the pantograph raising and lowering times.

[0073] Example 5

[0074] Based on the above embodiments, in this embodiment, the signal processing module includes a preprocessing circuit and an analog-to-digital conversion circuit. The input terminal of the preprocessing circuit is connected to the sensor signal judgment loop, the output terminal of the preprocessing circuit is connected to the input terminal of the analog-to-digital conversion circuit, and the output terminal of the analog-to-digital conversion circuit is connected to the input terminal of the high-voltage component monitoring module. The preprocessing circuit is used to preprocess the measured signal when the acquisition sensor successfully obtains the measured signal. The analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the preprocessed measured signal to obtain signal data, and transmit the signal data to the high-voltage component monitoring module.

[0075] In this embodiment, the preprocessing circuit first preprocesses the signal acquired by the acquisition sensor, including amplification and filtering. Subsequently, the analog-to-digital conversion circuit performs analog-to-digital conversion on the signal, converting the analog signal into a digital signal, and sends the digital signal to the high-voltage component monitoring module, which facilitates the module's calculation and processing. By preprocessing the signal, the signal's recognizability and accuracy can be effectively improved.

[0076] In one embodiment, the preprocessing circuit includes an amplification circuit, which amplifies the measured signal when the acquisition sensor successfully acquires it. In this embodiment, each acquisition sensor is connected to one end of a sensor signal judgment loop, the other end of each sensor signal judgment loop is connected to the input of an amplification circuit, and the output of the amplification circuit is connected to the input of the analog-to-digital conversion circuit. Each measured signal is amplified after acquisition, thereby effectively improving the strength and quality of the measured signal.

[0077] In one embodiment, the preprocessing circuit includes a filtering circuit, which filters the measured signal when the acquisition sensor successfully acquires it. In this embodiment, each acquisition sensor is connected to one end of a sensor signal judgment loop, the other end of each sensor signal judgment loop is connected to the input of a filtering circuit, and the output of the filtering circuit is connected to the input of the analog-to-digital conversion circuit. By filtering the measured signal through the filtering circuit, the quality and accuracy of the measured signal can be effectively improved.

[0078] In one embodiment, such as Figure 1B and Figure 2 As shown, the preprocessing circuit includes an amplification circuit and a filtering circuit. Each acquisition sensor is connected to one end of a sensor signal judgment loop, the other end of each sensor signal judgment loop is connected to the input of an amplification circuit, the output of each amplification circuit is connected to a filtering circuit, and the output of the filtering circuit is connected to the input of the analog-to-digital conversion circuit. In this embodiment, the measured signal acquired by the acquisition sensor is amplified and filtered sequentially before being input to the analog-to-digital conversion circuit for analog-to-digital conversion, which can effectively improve the signal strength and quality, thereby improving the monitoring accuracy.

[0079] In one embodiment, the high-voltage component monitoring module includes a processing module and an early warning module. The processing module is used to detect whether the signal data exceeds the preset monitoring threshold. When the signal data exceeds the preset monitoring threshold, the early warning module issues a fault warning message.

[0080] In this embodiment, the processing module includes an ARM CPU (Central Processing Unit), that is, the processing module includes a CPU with an ARM architecture. The processing module processes the signal data and calculates whether the signal data exceeds the threshold of the monitoring parameters of the corresponding high-voltage component according to the preset calculation logic. If it exceeds the threshold, the signal is sent to the early warning module, which then issues a fault warning message.

[0081] Example 6

[0082] Based on the above embodiments, this embodiment provides an application example.

[0083] This embodiment provides an online monitoring device for high-voltage components of a train, the system structure of which is as follows: Figure 1AAs shown, the online monitoring device consists of two parts: a signal acquisition module and a high-voltage component monitoring module, each powered by an independent power supply. The signal acquisition module collects the operating condition and electrical signals of each high-voltage component and transmits the data to the high-voltage component monitoring module via Ethernet. The monitoring module calculates the monitoring indicators of each high-voltage component based on the acquired raw signals and provides fault warnings according to the diagnostic logic of each component. Finally, the warning results are transmitted to the driver's cab display screen via Ethernet for human-machine interface display. Simultaneously, the monitoring module transmits real-time data to the vehicle-to-ground wireless transmission device via Ethernet, allowing the ground maintenance platform to obtain real-time monitoring data and the status monitoring results of each high-voltage component.

[0084] Before operation, the acquisition module needs to acquire the operating condition signals and electrical signals of each high-voltage component. The sensor distribution for acquiring signals from each high-voltage component is as follows: Figure 2 As shown, the acquisition module incorporates a sensor signal judgment loop to enable sensor self-testing. Under normal train operation, if the sensor fails to acquire the raw signal, the signal judgment loop will issue a sensor fault warning. After acquiring the raw signal, the sensor preprocesses it using a signal amplification circuit and a filtering circuit. Then, it acquires the signal data through A / D sampling and transmits the data to the high-voltage component monitoring module via Ethernet. The monitoring module processes the raw signal, calculates monitoring indicators, and judges the monitoring parameters of each component according to the warning logic. If the threshold is exceeded, a fault warning is issued. The specific signal acquisition correspondence is shown in Table 1. Please refer to... Figure 2 Following Table 1, the following is a brief introduction to the sensors corresponding to each high-voltage component and the signals that need to be collected:

[0085] (1) Pantograph: The pantograph signals mainly consist of raising / lowering command signals and pantograph status feedback signals. The raising / lowering command signals are obtained through the command signal processing loop, while the pantograph status feedback signals are obtained through the status feedback signal processing loop. After the raising command is issued, timer 1 records the current time t1. After raising the pantograph, timer 2 records the current time t2. Similarly, after the lowering command is issued, timer 1 records the current time t3. After lowering the pantograph, timer 2 records the current time t4.

[0086] (2) Roof-mounted surge arrester: The acquisition module is equipped with two current sensors, namely a zero-flux micro-current sensor A and an impulse current sensor, to acquire leakage current signals and large lightning impulse current signals during normal operation of the surge arrester. The surge arrester grounding wire passes through the sampling current sensor in a one-turn through-core mode and then returns to the original grounding point.

[0087] (3) Current transformer: The acquisition module is equipped with one current sensor, namely current sensor A, which mainly acquires the primary current signal I of the current transformer. 原边 .

[0088] (4) Voltage transformer: A current transformer CT1 is installed on the grounding wire on the high-voltage side to sample the leakage current I1 on the primary side. The acquisition module synchronously samples the secondary voltage U2 of the voltage transformer at high speed.

[0089] (5) Main Circuit Breaker: The acquisition module synchronously samples the main circuit breaker disconnect current at high speed. The main contact disconnection status signal is obtained by the status signal processing module. When the main contact disconnects, the current sensor B measures the current I when the main circuit breaker disconnects. 断开 .

[0090] (6) Traction Transformer: The acquisition module is equipped with three current sensors, namely current sensor C, zero-flux micro-current sensor B, and high-frequency current sensor (HFCT), to measure the load current I of the traction converter during operation. 负载 Iron core grounding current I 接地 High-frequency partial discharge current I 局放 The transformer core grounding lead passes through the zero-flux microcurrent sensor B and the high-frequency current sensor before grounding.

[0091] Table 1 Correspondence between high-voltage components and acquired signals.

[0092]

[0093]

[0094] (II) High-voltage component monitoring module

[0095] (1) Calculation of monitoring indicators

[0096] After obtaining the original operating condition signals and electrical signals, the monitoring module processes the original signals and calculates the monitoring indicators. The specific calculations are performed by the ARM (Automatic Power Array). Below is a brief introduction to the monitoring indicators that need to be calculated for each high-voltage component:

[0097] 1) Pantograph: The monitoring module calculates the pantograph raising completion time T at the time t1 when the pantograph raising command is issued and at the time t2 when the pantograph raising is completed (status feedback: pantograph raised), and at the time t3 when the pantograph lowering command is issued and at the time t4 when the pantograph lowering is completed (status feedback: pantograph lowered). 升弓 = t2-t1, the time T for bow descent to be completed 降弓 =t4-t3, T 升弓 and T 降弓 This serves as an indicator for judging whether the pantograph is raised and lowered normally.

[0098] 2) Roof-mounted surge arrester: Based on the original data of secondary voltage and leakage current, the fundamental frequency, amplitude, and phase of the voltage and current are calculated using the FFT algorithm. The total current I is then calculated by referring to the fundamental phase of the voltage and current. xResistive current I r Capacitive current I c The magnitude of the resistive current is then determined, and the ratio of the resistive current to the total current is calculated. ratio of capacitive current to total current

[0099] 3) Current transformer: When I 负载 When I = 0, calculate the current value I on the primary side. 原边 Zero drift value I 零漂 , zero drift value I 零漂 As a judgment indicator for monitoring the fault status of current transformers.

[0100] 4) Voltage transformer: After obtaining the secondary side voltage U2 and the primary side leakage current I1, the phase angle φ of the primary side leakage current is calculated according to the FFT algorithm. i and secondary voltage phase φ u Then calculate its phase difference Δ φ =φ u -φ i .

[0101] 5) Main circuit breaker: When the main contacts open, the acquired current signal I... 断开 Calculate amplitude I 断开 ′.

[0102] 6) Traction transformer: through the core grounding current I 接地 and high-frequency partial discharge current signal I 局放 Calculate the partial discharge quantity Q of the traction transformer winding and the amplitude of the core grounding current I. 接地 ′.

[0103] (2) Fault warning logic

[0104] After calculating the monitoring indicators from the original signals, the real-time operating status of each high-voltage component is evaluated using a threshold comparison method. Exceeding the alarm threshold is defined as a Class I alarm; exceeding the warning threshold is defined as a Class II alarm; exceeding the attention threshold is defined as a Class III alarm; X represents normal operation. Table 2 shows the evaluation criteria for the real-time operating status of each high-voltage component.

[0105] Table 2 Real-time Operating Status Evaluation Criteria for High Voltage Components

[0106]

[0107]

[0108] In the above embodiments, an online monitoring device for high-voltage components of a train, including traction transformers, main circuit breakers, surge arresters, voltage transformers, current transformers, and pantographs, is provided. This device has the advantage of accurate fault location and has high practical value.

[0109] In this embodiment, an online monitoring device for high-voltage components of a train is designed. The device includes a signal acquisition module and a high-voltage component monitoring module. The signal acquisition module can acquire the raw signals of each high-voltage component in real time, and a sensor self-testing circuit is designed to realize the self-testing function of the sensors. The high-voltage component monitoring module calculates the monitoring indicators of each high-voltage component by acquiring electrical parameter data on the high-voltage main circuit in real time, and makes a status assessment of the health status of each component through an early warning algorithm, thus achieving full coverage of the status monitoring of high-voltage components in the train's high-voltage main circuit.

[0110] Beneficial effects: The diagnostic results can guide targeted troubleshooting and handling at the fault site, improve fault handling efficiency, and save manpower and resources.

[0111] In the above embodiments, the processing module includes a processor, which may include, but is not limited to, one or more processors or microprocessors. Each processor may be implemented as an Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), controller, microcontroller, microprocessor, or other electronic components, and is used to execute the methods in the above embodiments.

[0112] Computer-readable storage media can be implemented by any type of volatile or non-volatile storage device or a combination thereof. Computer-readable storage media may include, but are not limited to, random access memory (RAM), read-only memory (ROM), flash memory, EPROM memory, EEPROM memory, registers, and computer storage media (e.g., hard disks, floppy disks, solid-state drives, removable disks, Blu-ray discs, etc.).

[0113] Computer-readable storage media may also store at least one computer-executable program / instruction, such as computer-readable instructions. Computer-readable storage media include, but are not limited to, volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory. Computer-readable storage media may include, for example, read-only memory (ROM), hard disk, flash memory, etc. For example, a non-transitory computer-readable storage medium may be connected to a computing device such as a computer, and then, when the computing device executes the computer-readable instructions stored on the computer-readable storage medium, the various methods described above can be performed.

[0114] In addition, the computer device may include (but is not limited to) a data bus, an input / output (I / O) bus, a display, and input / output devices (e.g., keyboard, mouse, speakers, etc.).

[0115] The processor can communicate with external devices via the I / O bus through wired or wireless networks.

[0116] In one embodiment, the at least one computer-executable instruction may also be compiled into or comprise a software product / computer program product, wherein one or more computer-executable instructions are executed by a processor to perform the steps of the various functions and / or methods in the embodiments described herein.

[0117] In the embodiments provided in this disclosure, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0118] It should be noted that, in this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element limited by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0119] While the embodiments disclosed herein are as described above, the foregoing content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit this disclosure. Any person skilled in the art to which this disclosure pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope of this disclosure; however, the scope of patent protection of this disclosure shall still be determined by the scope defined in the appended claims.

Claims

1. A monitoring device for high-voltage components in trains, characterized in that, include: Signal acquisition module and high-voltage component monitoring module; The signal acquisition module includes multiple acquisition sensors and acquisition circuits. Each acquisition sensor is connected to the input terminal of the acquisition circuit, and the output terminal of the acquisition circuit is connected to the input terminal of the high-voltage monitoring module. Each of the aforementioned acquisition sensors is used to connect to a high-voltage component under test, and each of the aforementioned acquisition sensors is used to monitor the connected high-voltage component under test and obtain the measured signal of the high-voltage component under test; The acquisition circuit is used to detect whether the acquisition sensor has successfully obtained the measured signal. When the acquisition sensor fails to obtain the measured signal, an alarm signal is issued. When the measured signal is successfully obtained, the signal data corresponding to the measured signal is sent to the high-voltage component monitoring module. The high-voltage component monitoring module is used to detect signal data, and when the signal data exceeds a preset monitoring threshold, it issues a fault warning.

2. The apparatus according to claim 1, characterized in that, The acquisition circuit includes multiple sensor signal judgment loops. Each acquisition sensor is connected to the input terminal of a sensor signal judgment loop, and the output terminal of each sensor signal judgment loop is connected to the input terminal of the high voltage monitoring module. The sensor signal judgment circuit is used to detect whether the acquisition sensor has successfully obtained the measured signal. When the acquisition sensor fails to obtain the measured signal, an alarm signal is issued.

3. The apparatus according to claim 2, characterized in that, The acquisition circuit also includes a signal processing module. The output terminal of each sensor signal judgment circuit is connected to the input terminal of the signal processing module, and the output terminal of the signal processing module is connected to the input terminal of the high voltage monitoring module. The signal processing module is used to preprocess and perform analog-to-digital conversion on the measured signal when the acquisition sensor successfully obtains the measured signal, to obtain signal data, and to transmit the signal data to the high-voltage component monitoring module.

4. The apparatus according to claim 3, characterized in that, The signal processing module includes a preprocessing circuit and an analog-to-digital conversion circuit. The input terminal of the preprocessing circuit is connected to the sensor signal judgment circuit, the output terminal of the preprocessing circuit is connected to the input terminal of the analog-to-digital conversion circuit, and the output terminal of the analog-to-digital conversion circuit is connected to the input terminal of the high-voltage component monitoring module. The preprocessing circuit is used to preprocess the measured signal when the acquisition sensor successfully obtains the measured signal; The analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the preprocessed test signal to obtain signal data, and then transmit the signal data to the high-voltage component monitoring module.

5. The apparatus according to claim 4, characterized in that, The preprocessing circuit includes an amplification circuit, which amplifies the measured signal when the acquisition sensor successfully obtains the measured signal.

6. The apparatus according to claim 4, characterized in that, The preprocessing circuit includes a filtering circuit, which is used to filter the measured signal when the acquisition sensor successfully obtains the measured signal.

7. The apparatus according to claim 1, characterized in that, The signal acquisition module also includes a pantograph status detection unit, which is connected to the input terminal of the signal processing module. The pantograph status detection unit is used to obtain the time when the pantograph raises the pantograph and the time when the pantograph completes raising; to obtain the time when the pantograph lowers the pantograph and the time when the pantograph completes lowering; and to obtain the time when the pantograph lowers the pantograph and the time when the pantograph completes lowering. The signal processing module then sends the time when the pantograph raises the pantograph, the time when the pantograph raises the pantograph, the time when the pantograph lowers the pantograph, and the time when the pantograph lowers the pantograph to the high-voltage component monitoring module. The high-voltage component monitoring module is used to acquire the time when the pantograph raising command is issued, the time when the pantograph raising is completed, the time when the pantograph lowering command is issued, and the time when the pantograph lowering is completed. It calculates the pantograph raising time using the time when the pantograph raising command is issued and the time when the pantograph lowering is completed, and calculates the pantograph lowering time using the time when the pantograph lowering command is issued and the time when the pantograph lowering is completed. It also checks whether the pantograph raising time and the pantograph lowering time meet the pantograph raising time and pantograph lowering time indicators.

8. The apparatus according to claim 7, characterized in that, The pantograph status detection unit includes a pantograph indicator signal circuit, a pantograph status feedback circuit, and a timer. The pantograph indicator signal circuit and the pantograph status feedback circuit are respectively connected to the timer, and the timer is connected to the signal processing module. The timer is used to obtain the time of issuance of the pantograph raising command when the pantograph indicator signal circuit issues the pantograph raising command, to obtain the time of completion of the pantograph raising command when the pantograph status feedback circuit receives the pantograph raising completion information, to obtain the time of issuance of the pantograph lowering command when the pantograph indicator signal circuit issues the pantograph lowering command, and to obtain the time of completion of the pantograph lowering command when the pantograph status feedback circuit receives the pantograph lowering completion information.

9. The apparatus according to claim 8, characterized in that, The timer includes a first timer and a second timer. The pantograph indicator signal circuit is connected to the first timer. The pantograph status feedback circuit is connected to the second timer. The first timer and the second timer are connected to the signal processing module. The first timer is used to obtain the time when the pantograph raising command is issued by the pantograph indicator signal circuit, and to obtain the time when the pantograph raising is completed by the pantograph status feedback circuit. The second timer is used to obtain the time when the pantograph lowering command is issued by the pantograph indicator signal circuit, and to obtain the time when the pantograph lowering is completed when the pantograph status feedback circuit receives the lowering completion information.

10. The apparatus according to any one of claims 1-9, characterized in that, The high-voltage component monitoring module includes a processing module and an early warning module. The processing module is used to detect whether the signal data exceeds the preset monitoring threshold. When the signal data exceeds the preset monitoring threshold, the early warning module issues a fault warning message.

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