Traveling wave recording device and traveling wave distance measuring equipment

Abstract

The invention relates to a traveling wave recording device and traveling wave distance measuring equipment. The traveling wave recording device comprises a traveling wave detection module which is connected with a power transmission line and is used for detecting a traveling wave signal on the power transmission line and outputting a first trigger signal under the condition that the amplitude of the traveling wave signal is greater than a preset amplitude; the timing module is used for periodically outputting a second trigger signal; the control storage module is respectively connected with the traveling wave detection module and the timing module, and is used for carrying out wave recording processing on the traveling wave signal according to a preset wave recording duration under the condition that at least one of the first trigger signal and the second trigger signal is received; and when the first trigger signal and the second trigger signal are not received and the recording processing is completed, the device is in a dormant state. The traveling wave recording device has the advantage of low power consumption.

Description

Technical Field

[0001] The present application relates to the technical field of power systems, and in particular to a traveling wave recording device and a traveling wave ranging device. Background Art

[0002] In DC transmission projects, it is often necessary to record traveling wave data on the transmission line to pinpoint the fault location based on the traveling wave signals at the time of the fault. However, the traveling wave data during normal operation often creates redundancy in subsequent signal processing and decision analysis, and real-time data acquisition also consumes significant power. Summary of the Invention

[0003] Based on this, it is necessary to provide a low-power traveling wave recording device and traveling wave ranging equipment to address the above technical problems.

[0004] In a first aspect, the present application provides a traveling wave recording device, comprising:

[0005] a traveling wave detection module connected to the power transmission line, configured to detect a traveling wave signal on the power transmission line, and output a first trigger signal when the amplitude of the traveling wave signal is greater than a preset amplitude;

[0006] A timing module, configured to periodically output a second trigger signal;

[0007] A control storage module is connected to the traveling wave detection module and the timing module respectively, and is used to record the traveling wave signal according to a preset recording time when at least one of the first trigger signal and the second trigger signal is received, and record the timestamp information of the recording process, so as to determine the time when the fault on the transmission line occurs according to the timestamp information; when the first trigger signal and the second trigger signal are not received, and after the recording process is completed, it is in a dormant state.

[0008] In one embodiment, the control storage module is further configured to perform clock synchronization processing according to at least one of the first trigger signal and the second trigger signal.

[0009] In one embodiment, the control storage module includes:

[0010] storage unit;

[0011] an acquisition control unit, connected to the traveling wave detection module and the timing module respectively, and configured to output an enable signal upon receiving at least one of the first trigger signal and the second trigger signal;

[0012] A direct memory access unit is connected to the acquisition control unit and the traveling wave detection module respectively, and is used to establish a connection with the storage unit when receiving the enable signal, transmit the traveling wave signal to the storage unit, and record the timestamp information to determine the time when the fault occurs on the transmission line according to the timestamp information.

[0013] In one embodiment, the traveling wave recording device further comprises:

[0014] a sampling module, connected to the traveling wave detection module and the acquisition control unit, respectively, for sampling the traveling wave signal and outputting a digital sampling signal upon receiving the enable signal;

[0015] The data processing module is connected to the sampling module and the acquisition control unit respectively, and is used to perform data processing on the digital sampling signal when the enable signal is received.

[0016] In one embodiment, the direct memory access unit is also connected to the data processing module, and the direct memory access unit is further used to establish a connection with the storage unit when receiving the enable signal, and transmit the digital sampling signal after data processing to the storage unit.

[0017] In one embodiment, the traveling wave recording device further comprises:

[0018] The control module is connected to the timing module and the control storage module respectively, and is used to control the working modes of the timing module and the control storage module according to the received mode signal; the working modes of the timing module and the control storage module are consistent.

[0019] In one embodiment, the mode signal includes a low power mode signal and a general mode signal; the operating mode includes a low power mode and a general mode;

[0020] The control switch module is further configured to control the timing module and the control storage module to respectively operate in the low-power operation mode according to the received low-power mode signal, and to control the timing module and the control storage module to respectively operate in the general operation mode according to the received general mode signal; wherein,

[0021] In the low-power operation mode, the control storage module performs recording processing on the traveling wave signal according to a preset recording time when receiving at least one of the first trigger signal and the second trigger signal;

[0022] In the general working mode, the control storage module performs real-time recording processing on the traveling wave signal.

[0023] In one embodiment, the control module is further configured to set a timing period of the timing module and a recording duration of the control storage module according to received configuration parameters.

[0024] In one embodiment, the traveling wave detection module includes:

[0025] a traveling wave sensing unit, connected to the transmission line, and configured to collect traveling wave signals on the transmission line;

[0026] The wave head detection unit is connected to the traveling wave sensing unit and the control storage module respectively, and is used to determine the amplitude of the traveling wave signal and output the first trigger signal when the amplitude of the traveling wave signal is greater than the preset amplitude.

[0027] In a second aspect, the present application further provides a traveling wave ranging device, comprising:

[0028] The traveling wave recording device provided in any of the above embodiments is used to record the traveling wave signal of the transmission line and output the recording information; the recording information includes time stamp information;

[0029] A traveling wave locating device is connected to the traveling wave recording device and is used to locate the fault point on the transmission line according to the recorded information.

[0030] In the above-mentioned traveling wave recording device and traveling wave ranging equipment, the traveling wave recording device includes a traveling wave detection module, a timing module and a control storage module. The traveling wave detection module is connected to the transmission line, and the control storage module is connected to the traveling wave detection module and the timing module respectively. The control storage module is affected by the traveling wave detection module and the timing module at the same time. The traveling wave detection module can detect the traveling wave signal on the transmission line in real time, and when the amplitude of the traveling wave signal is greater than the preset amplitude, it outputs a first trigger signal to wake up the control storage module, or periodically outputs a second trigger signal through the timing module to wake up the control storage module; after the control storage module is awakened, it records the traveling wave signal according to the preset recording time, and re-enters the sleep state after the recording is completed. Compared with the traditional method of always recording the traveling wave signal, it can significantly reduce power consumption, save resources, and extend the service life of the traveling wave recording device. In addition, since the control module records the timestamp information of each recording process, that is, it records the timestamp information of the periodic recording process and the timestamp information of the recording process when the fault occurs, the time when the fault occurs can be accurately calculated based on the timestamp information of the periodic recording process and the timestamp information of the recording process when the fault occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is one of the structural block diagrams of a traveling wave recording device in one embodiment;

[0033] Figure 2 1 is a structural block diagram of a control storage module in a traveling wave recording device in one embodiment;

[0034] Figure 3 is a timing diagram of a traveling wave recording device in one embodiment;

[0035] Figure 4 This is the second structural block diagram of a traveling wave recording device in one embodiment;

[0036] Figure 5 This is the third structural block diagram of a traveling wave recording device in one embodiment;

[0037] Figure 6 1 is a structural block diagram of a traveling wave detection module in a traveling wave recording device in an embodiment.

[0038] Description of reference numerals:

[0039] 100-traveling wave detection module, 110-traveling wave perception unit, 120-wave head detection unit, 200-timing module, 300-control storage module, 310-acquisition control unit, 320-direct memory access unit, 330-storage unit, 400-sampling module, 500-data processing module, 600-control module. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0042] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0043] It is understood that “at least one” refers to one or more, “a plurality” refers to two or more, and “at least a portion of an element” refers to a portion or all of an element.

[0044] When used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0045] In one embodiment, Figure 1 As shown, the present application provides a traveling wave recording device, including a traveling wave detection module 100, a timing module 200 and a control storage module 300. The traveling wave detection module 100 is connected to the transmission line, and the control storage module 300 is connected to the traveling wave detection module 100 and the timing module 200 respectively.

[0046] The traveling wave detection module 100 is used to detect traveling wave signals on the transmission line and output a first trigger signal when the amplitude of the traveling wave signal is greater than a preset amplitude. The preset amplitude can be reasonably set according to empirical rules. The traveling wave detection module 100 may include multiple sensors, and different sensors are used to detect traveling wave signals at different monitoring points on the transmission line. When a fault occurs in the transmission line, the traveling wave signal on the transmission line will undergo a sudden change. Therefore, the traveling wave detection module 100 can determine that a fault has occurred on the transmission line and output a first trigger signal when it detects that the amplitude of the traveling wave signal is greater than the preset amplitude.

[0047] The timing module 200 is used to periodically output the second trigger signal. For example, the timing module 200 may output the second trigger signal after a timing period ends, or may output the second trigger signal when the timing reaches a preset value.

[0048] The control storage module 300 is configured to, upon receiving at least one of the first trigger signal and the second trigger signal, record the traveling wave signal according to a preset recording duration and record the timestamp information of the recording process to determine the time of occurrence of a fault on the transmission line based on the timestamp information. The timestamp information includes the timestamp information of the periodic recording process and the timestamp information of the recording process performed when the fault occurs. The control storage module 300, a host computer, or other module with computing and processing capabilities can determine the time of occurrence of the fault based on the timestamp information of the periodic recording process and the timestamp information of the recording process performed when the fault occurs.

[0049] The control storage module 300 is further configured to be in a dormant state when the first trigger signal and the second trigger signal are not received and when the wave recording process is completed. The preset wave recording time can be reasonably set according to actual needs.

[0050] In an embodiment of the present application, a traveling wave recording device includes a traveling wave detection module 100, a timing module 200, and a control storage module 300. The control storage module 300 is affected by both the traveling wave detection module 100 and the timing module 200. The traveling wave detection module 100 can detect the traveling wave signal on the transmission line in real time, and when the amplitude of the traveling wave signal is greater than a preset amplitude, the control storage module 300 is output with a first trigger signal, or the timing module 200 periodically outputs a second trigger signal to wake up the control storage module 300. After being woken up, the control storage module 300 records the traveling wave signal according to the preset recording duration. After the recording is completed and when the first trigger signal and the second trigger signal are not received, the control storage module 300 enters a dormant state and does not perform the recording process. Compared with the traditional method of always recording the traveling wave signal, the present application can significantly reduce power consumption, save resources, and extend the service life of the device. In addition, since the control module 300 records the timestamp information of each recording process, that is, it records the timestamp information of the periodic recording process and the timestamp information of the recording process performed when the fault occurs, the time when the fault occurs can be accurately calculated based on the timestamp information of the periodic recording process and the timestamp information of the recording process performed when the fault occurs.

[0051] In one embodiment, the control storage module 300 is further configured to perform clock synchronization based on at least one of the first trigger signal and the second trigger signal. Clock synchronization involves synchronizing each local clock in the traveling wave recording device to a unified UTC (Coordinated Universal Time) time reference via a satellite clock to eliminate time deviations between different modules. Locating fault points on transmission lines based on traveling wave signals is based on the absolute time difference of the traveling wave signals at different monitoring points on the transmission line. Therefore, clock synchronization is a crucial process.

[0052] In this embodiment, since the second trigger signal is a periodic signal, the control storage module 300 will perform periodic clock synchronization processing, and can periodically check the clock synchronization function of the traveling wave recording device to ensure that the clock synchronization function of the traveling wave recording device can operate normally, thereby ensuring the quality of the collected traveling wave data.

[0053] In one embodiment, Figure 2 As shown, the control storage module 300 includes a storage unit 330, an acquisition control unit 310, and a direct memory access unit 320. The acquisition control unit 310 is connected to the traveling wave detection module 100, the timing module 200, and the direct memory access unit 320 respectively, and the direct memory access unit 320 is also connected to the traveling wave detection module 100.

[0054] The acquisition control unit 310 is configured to output an enable signal upon receiving at least one of a first trigger signal and a second trigger signal. The direct memory access unit 320 is configured to establish a connection with the storage unit 330 upon receiving the enable signal, transmit the traveling wave signal to the storage unit 330, and record timestamp information so as to determine the time when the fault on the transmission line occurred based on the timestamp information.

[0055] It is understandable that Figure 3As shown, the timing module 200 periodically sends a second trigger signal to the acquisition control unit 310. Exemplarily, the second trigger signal is a rising edge signal, and the timing period is 900 seconds. Upon detecting that the amplitude of the traveling wave signal is greater than a preset amplitude, the traveling wave detection module 100 sends a first trigger signal to the acquisition control unit 310. Exemplarily, the first trigger signal is a rising edge signal. Upon receiving the first or second trigger signal, the acquisition control unit 310 sends an enable signal to the direct memory access unit 320 to activate the direct memory access unit 320. When the enable signal is high, the direct memory access unit 320 enters a dormant state. When the enable signal is low, the direct memory access unit 320 activates and transfers the traveling wave signal within a preset recording duration to the memory unit for storage. Exemplarily, the preset recording duration is 60 seconds. After the preset recording duration has expired, the enable signal transitions to a high level, and the direct memory access unit 320 enters a dormant state.

[0056] In one embodiment, Figure 4 As shown, the traveling wave recording device further includes a sampling module 400 and a data processing module 500. The sampling module 400 is connected to the traveling wave detection module 100, the acquisition control unit 310, and the data processing module 500. The data processing module 500 is also connected to the acquisition control unit 310.

[0057] The sampling module 400 is used to sample the traveling wave signal and output a digital sampling signal when receiving an enable signal. The sampling module 400 may be a high-precision ADC sampling module 400 .

[0058] The data processing module 500 is used to perform data processing on the digital sampling signals when an enable signal is received. The data processing may include digital filtering processing, wave head detection processing (such as wavelet transform) and the like on the digital sampling signals.

[0059] It can be understood that the sampling module 400 samples the traveling wave signal only after receiving the enable signal. Similarly, the data processing module 500 processes the digital sampling signal sampled by the sampling module 400 only after receiving the enable signal, which can further reduce power consumption.

[0060] In one embodiment, the direct memory access unit 320 is further connected to the data processing module 500. The direct memory access unit 320 is further configured to establish a connection with the storage unit 330 upon receiving an enable signal and transmit the processed digital sample signal to the storage unit 330.

[0061] It can be understood that after the control storage module 300 receives the first trigger signal or the second trigger signal, it will send corresponding enable signals to the direct memory access unit 320, the sampling module 400, and the data processing module 500 respectively. After receiving the enable signal, the sampling module 400 will sample the traveling wave signal collected by the traveling wave detection module 100, generate a digital sampling signal, and send the digital sampling signal to the data processing module 500. The data processing module 500 will perform data processing on the digital sampling signal sent by the sampling module 400 and send the processed digital sampling signal to the direct memory access unit 320. The direct memory access unit 320 will transmit the processed digital sampling signal to the storage unit 330 for storage.

[0062] In one embodiment, Figure 5 As shown, the traveling wave recording device further includes a control module 600. The control module 600 is connected to the timing module 200 and the control storage module 300 respectively.

[0063] The control module 600 is used to control the operating mode of the timing module 200 and the control storage module 300 based on the received mode signal. The mode signal includes a low-power mode signal and a universal mode signal, and the operating mode includes a low-power operating mode and a universal operating mode. The mode signal can be sent to the control module 600 of the traveling wave recording device by the host computer, or it can be manually input through the interactive interface of the traveling wave recording device. The operating mode of the timing module 200 and the control storage module 300 is the same, that is, the timing module 200 and the control storage module simultaneously operate in the low-power operating mode or the universal operating mode.

[0064] The control switch module is also used to control the timing module 200 and the control storage module 300 to work in the low power mode according to the received low power mode signal, and to control the timing module 200 and the control storage module 300 to work in the general mode according to the received general mode signal.

[0065] In the low-power operating mode, upon receiving at least one of the first trigger signal and the second trigger signal, the control storage module 300 records the traveling wave signal according to the preset recording duration. Accordingly, the timing module 200 periodically sends the second trigger signal to the control storage module 300 only in the low-power operating mode. In the general operating mode, the control storage module 300 records the traveling wave signal in real time, and the timing module 200 is accordingly disabled.

[0066] When the timer is in the low-power working mode, it needs to periodically send a second trigger signal to the control storage module 300, but when it is in the general working mode, it does not need to be started. It should be understood that although the power loss of the timer in the low-power working mode is greater than the power loss in the general working mode, the power loss of the traveling wave recording device as a whole in the low-power working mode is less than the power loss in the general working mode.

[0067] In one embodiment, the control module 600 is further configured to set the timing period of the timing module 200 and the recording duration of the control storage module 300 based on received configuration parameters. The configuration parameters may be sent to the control module 600 by a host computer or manually input by a user through the interactive interface of the traveling wave recording device. The configuration parameters include the timing period of the timing module 200 and the recording duration of the control storage module 300.

[0068] In one embodiment, Figure 6 As shown, the traveling wave detection module 100 includes a traveling wave sensing unit 110 and a wave head detection unit 120. The traveling wave sensing unit 110 is connected to the power transmission line, and the wave head detection unit 120 is connected to the traveling wave sensing unit 110 and the control storage module 300 respectively.

[0069] The traveling wave sensing unit 110 is used to collect traveling wave signals on the transmission line. The traveling wave sensing unit 110 can be a traveling wave sensor. The number of traveling wave sensing units 110 can be one or more. Different traveling wave sensing units 110 can be used to collect traveling wave signals at different monitoring points on the transmission line.

[0070] The wave head detection unit 120 is used to determine the amplitude of the traveling wave signal, and output a first trigger signal when the amplitude of the traveling wave signal is greater than a preset amplitude.

[0071] In one embodiment, based on the same inventive concept, the present application further provides a traveling wave ranging device, comprising a traveling wave positioning device and a traveling wave recording device provided in any of the above embodiments. The traveling wave positioning device is connected to the traveling wave recording device.

[0072] The traveling wave recording device is used to record and process the traveling wave signals of the transmission line and output the recorded information. The recorded information includes timestamp information. The traveling wave locating device is used to locate the fault point on the transmission line based on the recorded information. Specifically, the timestamp information includes timestamp information from periodic recording processing and timestamp information from recording processing performed when the fault occurs. The traveling wave locating device can determine the time of fault occurrence based on the timestamp information from periodic recording processing and the timestamp information from recording processing performed when the fault occurs, and then calculate the fault point based on the time of fault occurrence and the propagation speed of the traveling wave.

[0073] In this embodiment, the traveling wave ranging device includes a traveling wave recording device and a traveling wave positioning device. Because the control storage module in the traveling wave recording device is influenced by both the traveling wave detection module and the timing module, the traveling wave signal is recorded according to the preset recording duration only when the amplitude of the traveling wave signal is greater than the preset amplitude or when a second trigger signal is received. After the recording is completed, the device returns to a dormant state, significantly reducing the power consumption of the recording process and, in turn, the overall power consumption of the traveling wave ranging device, extending the service life of the traveling wave ranging device. Furthermore, the traveling wave positioning device can accurately determine the time of fault occurrence based on the timestamp information of the periodic recording process and the timestamp information of the recording process performed when the fault occurs, thereby more precisely determining the fault point.

[0074] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0075] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A traveling wave recording device, characterized in that: include: a traveling wave detection module connected to the power transmission line, configured to detect a traveling wave signal on the power transmission line, and output a first trigger signal when the amplitude of the traveling wave signal is greater than a preset amplitude; A timing module, configured to periodically output a second trigger signal; A control storage module is connected to the traveling wave detection module and the timing module respectively, and is used to record the traveling wave signal according to a preset recording time when at least one of the first trigger signal and the second trigger signal is received, and record the timestamp information of the recording process, so as to determine the time when the fault on the transmission line occurs according to the timestamp information; when the first trigger signal and the second trigger signal are not received, and after the recording process is completed, it is in a dormant state.

2. The traveling wave recording device according to claim 1, characterized in that: The control storage module is further configured to perform clock synchronization processing according to at least one of the first trigger signal and the second trigger signal.

3. The traveling wave recording device according to claim 1, characterized in that: The control storage module includes: storage unit; an acquisition control unit, connected to the traveling wave detection module and the timing module respectively, and configured to output an enable signal upon receiving at least one of the first trigger signal and the second trigger signal; A direct memory access unit is connected to the acquisition control unit and the traveling wave detection module respectively, and is used to establish a connection with the storage unit when receiving the enable signal, transmit the traveling wave signal to the storage unit, and record the timestamp information to determine the time when the fault on the transmission line occurs according to the timestamp information.

4. The traveling wave recording device according to claim 3, characterized in that: The traveling wave recording device also includes: a sampling module, connected to the traveling wave detection module and the acquisition control unit, respectively, for sampling the traveling wave signal and outputting a digital sampling signal upon receiving the enable signal; The data processing module is connected to the sampling module and the acquisition control unit respectively, and is used to perform data processing on the digital sampling signal when the enable signal is received.

5. The traveling wave recording device according to claim 4, characterized in that: The direct memory access unit is also connected to the data processing module. The direct memory access unit is further configured to establish a connection with the storage unit upon receiving the enable signal and transmit the digital sampling signal after data processing to the storage unit.

6. The traveling wave recording device according to claim 1, characterized in that: The traveling wave recording device also includes: The control module is connected to the timing module and the control storage module respectively, and is used to control the working modes of the timing module and the control storage module according to the received mode signal; the working modes of the timing module and the control storage module are consistent.

7. The traveling wave recording device according to claim 6, characterized in that: The mode signal includes a low power mode signal and a general mode signal; the working mode includes a low power working mode and a general working mode; The control switch module is further configured to control the timing module and the control storage module to respectively operate in the low-power operation mode according to the received low-power mode signal, and to control the timing module and the control storage module to respectively operate in the general operation mode according to the received general mode signal; wherein, In the low-power operation mode, the control storage module performs recording processing on the traveling wave signal according to a preset recording time when receiving at least one of the first trigger signal and the second trigger signal; In the general working mode, the control storage module performs real-time recording processing on the traveling wave signal.

8. The traveling wave recording device according to claim 6, characterized in that: The control module is further configured to set the timing period of the timing module and the recording duration of the control storage module according to the received configuration parameters.

9. The traveling wave recording device according to any one of claims 1 to 8, characterized in that: The traveling wave detection module includes: a traveling wave sensing unit, connected to the transmission line, and configured to collect traveling wave signals on the transmission line; The wave head detection unit is connected to the traveling wave sensing unit and the control storage module respectively, and is used to determine the amplitude of the traveling wave signal and output the first trigger signal when the amplitude of the traveling wave signal is greater than the preset amplitude.

10. A traveling wave ranging device, characterized in that: include: The traveling wave recording device according to any one of claims 1 to 9, configured to perform recording processing on a traveling wave signal of a transmission line and output recording information; the recording information including timestamp information; A traveling wave locating device is connected to the traveling wave recording device and is used to locate the fault point on the transmission line according to the recorded information.

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