A characteristic waveform acquisition device for a configuration-based distribution network

Abstract

The present invention discloses a characteristic waveform acquisition device for a configuration-based distribution network, including a plurality of distributed wave recorders, a wave recording server, a distribution network dynamic model scene management system, and a wave recording query system, wherein each distributed wave recorder can record the waveform of a node of the configuration-based distribution network where it is located at a preset frequency, so that the wave recording server saves the waveform, and after the distribution network dynamic model scene management system triggers a fault, the wave recording server packages and compresses the waveform of each node at the time of the fault triggering, so that the wave recording query system obtains the characteristic waveform of the node corresponding to the fault time. It can be seen that the present application does not require manual acquisition of waveforms, nor does it require manual packaging or other processing of waveforms, which saves manpower and improves efficiency.

Description

Technical Field

[0001] The invention relates to the field of power distribution network detection, and in particular to a characteristic waveform acquisition device for a configuration-type power distribution network. Background Art

[0002] The configuration-based distribution network dynamic model scenario management system is usually used in the fields of new technology research of distribution network and system-level functional verification of distribution terminals, and provides an experimental platform for distribution network automation technology verification and system-level testing. The distribution network dynamic model scenario management system builds various types of distribution networks through configuration and constructs various experimental scenarios. The waveforms of each node in the configuration-based distribution network are recorded by a distributed recorder, and fault scenarios such as phase-to-phase short circuit faults and single-phase grounding faults are simulated based on the waveforms of each node. By exporting the characteristic waveforms of each node in the configuration-based distribution network, fault detection algorithm research and distribution terminal function detection can be carried out.

[0003] However, the capture of fault waveforms in distribution networks requires the recorder to have a higher sampling frequency and higher precision, which leads to an increase in the amount of waveform data. At the same time, distributed recorders of corresponding sizes need to be deployed based on different scales of configured distribution networks. Therefore, as the scale of distribution networks increases, there are higher requirements for the processing efficiency of waveform data.

[0004] In the prior art, the waveform is usually acquired by manual query, which is to search for waveform data of a certain length recorded near the approximate time of the fault, and then determine the actual time of the characteristic waveform through manual analysis, and use tools to combine the waveform data of multiple nodes into a waveform file. It can be seen that the traditional manual operation method is inefficient. For example, when the scale of the configuration-based distribution network increases, there will be a considerable amount of manual work, which will further reduce the efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a characteristic waveform acquisition device for a configuration-based distribution network, which does not require manual acquisition of waveforms, nor does it require manual packaging or other processing of waveforms, thereby saving manpower and improving efficiency.

[0006] In order to solve the above technical problems, the present invention provides a characteristic waveform acquisition device for a configuration-based power distribution network, comprising:

[0007] A plurality of distributed wave recorders respectively arranged at each node of the configuration-type distribution network, used for recording the waveform of the node of the configuration-type distribution network at a preset frequency;

[0008] A recording server connected to each of the distributed wave recorders is used to store the waveforms of each node recorded by each of the distributed wave recorders according to time, and to package and compress the waveforms of each node of the configured power distribution network at the time of fault triggering;

[0009] A distribution network dynamic model scenario management system connected to the wave recording server, used to trigger a fault to the configured distribution network, send the fault trigger time to the wave recording server, and send the fault event to the wave recording query system;

[0010] The wave recording query system connected to the wave recording server and the distribution network dynamic model scene management system is used to obtain the characteristic waveform of the node corresponding to the fault event from the waveform packaged and compressed by the wave recording server.

[0011] Preferably, it also includes:

[0012] The GPS timing system connected to each of the distributed wave recorders is used to obtain GPS precise timing and generate a timing pulse signal based on the GPS precise timing to adjust the clock of each of the distributed wave recorders to a clock consistent with the timing pulse signal.

[0013] Preferably, the GPS timing system comprises:

[0014] GPS antenna, used to obtain the GPS precise timing;

[0015] The timing server connected to the GPS antenna is used to generate the timing pulse signal based on the GPS precise timing, and send the timing pulse signal to each of the distributed recorders to adjust the clock of each of the distributed recorders to a clock consistent with the timing pulse signal.

[0016] Preferably, it also includes:

[0017] The network switch arranged between each of the distributed wave recorders and the wave recording server is used to provide a channel for data interaction between the distributed wave recorders and the wave recording server.

[0018] Preferably, the wave recording server is also used to control the startup of each of the distributed wave recorders based on user settings.

[0019] Preferably, it also includes:

[0020] The waveform calibration synthesis module connected to the wave recording query system is used to verify whether the frequencies of the characteristic waveforms of each node obtained by the wave recording query system are consistent, and if consistent, to perform time calibration processing on the sampling points of the waveform of each node so that the time difference between two adjacent sampling points in the waveform of each node is within a preset range.

[0021] Preferably, the sampling points of the waveform of each node are time-scaled and calibrated so that the time-scale difference between two adjacent sampling points in the waveform of each node is within a preset range, including:

[0022] Among the sampling points of the waveform of each node, the sampling points with the later time scale are eliminated among the two adjacent sampling points whose time scale difference is less than the minimum preset time scale difference, and a sampling point is added between the two adjacent sampling points whose time scale difference is greater than the maximum preset time scale difference using the interpolation algorithm.

[0023] Preferably, the recording server is specifically used to cyclically store the waveforms of each node recorded by each distributed recorder according to the first-in-first-out principle in accordance with time, and to package and compress the waveforms of each node of the configured distribution network at the fault triggering time.

[0024] Preferably, the wave recording server includes a waveform data storage module and a characteristic waveform query module;

[0025] The waveform data storage module is used to store the waveform of each node recorded by each distributed wave recorder according to time;

[0026] The characteristic waveform query module is used to package and compress the waveforms of each node of the configured power distribution network at the fault triggering time.

[0027] The present application provides a characteristic waveform acquisition device for a configuration-based distribution network, including a plurality of distributed wave recorders, a wave recording server, a distribution network dynamic model scenario management system, and a wave recording query system, wherein each distributed wave recorder can record the waveform of the node of the configuration-based distribution network where it is located at a preset frequency, so that the wave recording server can save the waveform. After the distribution network dynamic model scenario management system triggers a fault, the wave recording server packs and compresses the waveform of each node at the time of the fault triggering, so that the wave recording query system can obtain the characteristic waveform of the node corresponding to the fault time. It can be seen that the present application does not require manual acquisition of waveforms, nor does it require manual packaging or other processing of waveforms, which saves manpower and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A structural schematic diagram of a characteristic waveform acquisition device for a configuration-based power distribution network provided by the present invention;

[0030] Figure 2 A specific structural schematic diagram of a characteristic waveform acquisition device for a configuration-based power distribution network provided by the present invention. DETAILED DESCRIPTION

[0031] The core of the present invention is to provide a characteristic waveform acquisition device for a configuration-based power distribution network, which does not require manual acquisition of waveforms, nor does it require manual packaging or other processing of waveforms, thereby saving manpower and improving efficiency.

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Please refer to Figure 1 , Figure 1 A structural schematic diagram of a characteristic waveform acquisition device for a configuration-based power distribution network provided by the present invention, the device comprising:

[0034] A plurality of distributed wave recorders 11 respectively arranged at each node of the configuration-based distribution network, for recording the waveform of the node of the configuration-based distribution network at a preset frequency;

[0035] The wave recording server 12 connected to each distributed wave recorder 11 is used to store the waveform of each node recorded by each distributed wave recorder 11 according to time, and to package and compress the waveform of each node of the configuration-based power distribution network at the time of fault triggering;

[0036] The distribution network dynamic model scenario management system 13 connected to the wave recording server 12 is used to trigger a fault to the configured distribution network, send the fault trigger time to the wave recording server 12, and send the fault event to the wave recording query system 14;

[0037] The wave recording query system 14 connected to the wave recording server 12 and the distribution network dynamic model scene management system 13 is used to obtain the characteristic waveform of the node corresponding to the fault event from the waveform packaged and compressed by the wave recording server 12.

[0038] In this embodiment, a distributed recorder 11 is respectively set at each node of the configured distribution network. Each distributed recorder 11 is used to record the waveform of the node of the configured distribution network where it is located, and transmit it to the recording server 12, so that the recording server 12 stores the waveform of each node according to time. The distribution network dynamic model scenario management system 13 triggers a fault to the configured distribution network, and sends the fault trigger time to the recording server 12. Since the recording server 12 stores the waveform of each node according to time, the waveform of each node at the fault trigger time can be directly packaged and compressed, and sent to the recording query system 14, so that the recording query system 14 can obtain the characteristic waveform of the corresponding node.

[0039] It should be noted that after the distribution network dynamic model scenario management system 13 triggers a fault to the configured distribution network, the recording query system 14 does not always need to obtain the characteristic waveforms of all nodes based on the fault event, and it is sufficient to obtain the characteristic waveforms of only a few nodes. For example, the fault event sent by the distribution network dynamic model scenario management system 13 may include the node ID (Identity document) that triggered the fault, and the recording query system 14 can directly obtain the corresponding characteristic waveform based on the node ID.

[0040] In addition, the distribution network dynamic model scenario management system 13 in the present application triggers a fault to the configured distribution network according to the user's settings.

[0041] It should also be noted that the recording server 12 in the present application can be connected to multiple distributed recorders 11 at the same time. If the number of distributed recorders 11 is too large, multiple recording servers 12 can be set up, and each recording server 12 is connected to several distributed recorders 11 to reduce the resource usage of each recording server 12.

[0042] In addition, as a preferred embodiment, the recording server 12 is specifically used to cyclically store the waveforms of each node recorded by each distributed recorder 11 according to the first-in-first-out principle according to time, and to package and compress the waveforms of each node of the configured distribution network at the fault triggering time.

[0043] The applicant has considered that if there are many nodes and the distributed recorder 11 records a lot of waveform data, a large amount of storage space of the recording server 12 will be occupied. In order to save storage space, the present application can also recycle the storage space, that is, use the first-in-first-out principle to delete the first saved waveform and store the currently received waveform.

[0044] The distributed recorder 11 in this embodiment is a high-frequency recorder, which can record the waveform of the node where it is located at a preset frequency.

[0045] Based on this, in the present application, the waveforms of each node at the fault trigger time are directly packaged and compressed through the recording server 12, rather than manually searching for the waveforms of each node at the fault trigger time from multiple waveforms of multiple nodes stored, which saves manpower and is more efficient.

[0046] Based on the above embodiments:

[0047] Please refer to Figure 2 , Figure 2 A specific structural schematic diagram of a characteristic waveform acquisition device for a configuration-based power distribution network provided by the present invention.

[0048] As a preferred embodiment, it also includes:

[0049] The GPS (Global Positioning System) timing system connected to each distributed recorder 11 is used to obtain GPS precise timing and generate a timing pulse signal based on the GPS precise timing to adjust the clock of each distributed recorder 11 to a clock consistent with the timing pulse signal.

[0050] The applicant has taken into consideration that the clocks of each distributed wave recorder 11 are provided by a crystal oscillator respectively, but the clocks provided by different crystal oscillators may have different frequencies. Based on this, a GPS timing system is also provided in the present application, which can adjust the clocks of each distributed wave recorder 11 to pulses consistent with the timing pulse signal according to the precise GPS timing. Although the clocks of each distributed wave recorder 11 may still have different frequencies, the clocks of each distributed wave recorder 11 are continuously adjusted in the present application, that is, when the clock difference of each distributed wave recorder 11 exceeds a preset value, the clocks of each distributed wave recorder 11 are synchronized again.

[0051] Specifically, when synchronizing the clocks of each distributed recorder 11, the rising edge of the clock of each distributed recorder 11 can be adjusted to a synchronous rising edge, or the falling edge can be adjusted to a synchronous falling edge according to actual needs, and this application does not limit this.

[0052] As a preferred embodiment, the GPS timing system includes:

[0053] GPS antenna 21, used to obtain accurate GPS timing;

[0054] The timing server 22 connected to the GPS antenna 21 is used to generate a timing pulse signal based on the GPS precise timing, and send the timing pulse signal to each distributed recorder 11 to adjust the clock of each distributed recorder 11 to a clock consistent with the timing pulse signal.

[0055] The GPS antenna 21 in this embodiment is used to obtain GPS precise timing, so that the timing server 22 can calibrate the clocks of each distributed wave recorder 11 based on the GPS precise timing.

[0056] Of course, the present application is not limited to calibrating the clocks of each distributed recorder 11 only through the GPS timing system.

[0057] As a preferred embodiment, it also includes:

[0058] The network switch 23 disposed between each distributed wave recorder 11 and the wave recording server 12 is used to provide a data exchange channel between the distributed wave recorder 11 and the wave recording server 12 .

[0059] In this embodiment, data is exchanged between each distributed recorder 11 and the recording server 12 through the network switch 23, that is, each distributed recorder 11 sends the waveform recorded at its own node to the recording server 12 through the network switch 23, and the recording server 12 can manage each distributed recorder 11 through the network switch 23.

[0060] As a preferred embodiment, the wave recording server 12 is also used to control the startup of each distributed wave recorder 11 based on the user's settings.

[0061] The wave recording server 12 in this embodiment also controls each distributed wave recorder 11 to start up based on the user's settings, so as to realize the control of the distributed wave recorders 11 .

[0062] It should be noted that the recording server 12 in the present application controls the startup and shutdown of each distributed recorder 11 through a network switch 23. Of course, the recording server 12 can also perform other controls on each distributed recorder 11 through the network switch 23, and the present application does not limit this.

[0063] As a preferred embodiment, it also includes:

[0064] The waveform calibration synthesis module 24 connected to the wave recording query system 14 is used to verify whether the frequencies of the characteristic waveforms of each node obtained by the wave recording query system 14 are consistent, and if consistent, to perform time calibration processing on the sampling points of the waveform of each node, so that the time difference between two adjacent sampling points in the waveform of each node is within a preset range.

[0065] The applicant has taken into account that when there is a frequency error between the clocks of each distributed recorder 11, it may cause a phase deviation in the waveform of each node recorded by each distributed recorder 11. In order to solve the above technical problem, a waveform calibration synthesis module 24 is also provided in the present application, which can judge whether the frequencies of the characteristic waveforms of each node obtained by the recording query system 14 are consistent. If they are consistent, it means that there is no misalignment in the phase of the waveform recorded by each distributed recorder 11. However, if they are inconsistent, it means that a misalignment may have occurred. At this time, the user can be reminded to process it or make a phase adjustment.

[0066] In addition, the applicant has also taken into account that when the distributed recorder 11 records the waveform of the node where it is located, there may be a situation where the time difference between two sampling points is too small or too large. In order to ensure the validity of the characteristic waveform of each node obtained by the recording query module, the sampling points of the waveform of each node are also time-calibrated in this application to keep the time difference between two adjacent sampling points within a preset range.

[0067] As a preferred embodiment, the sampling points of the waveform of each node are time-scaled and calibrated so that the time-scale difference between two adjacent sampling points in the waveform of each node is within a preset range, including:

[0068] Among the sampling points of the waveform of each node, the sampling points with the later time scale are eliminated among the two adjacent sampling points whose time scale difference is less than the minimum preset time scale difference, and a sampling point is added between the two adjacent sampling points whose time scale difference is greater than the maximum preset time scale difference using the interpolation algorithm.

[0069] Specifically, when the sampling points of the waveform of each node are time-calibrated, when the time-scale difference between two adjacent sampling points is within a preset range, a sampling point is added between two adjacent sampling points whose time-scale difference is greater than the maximum preset time-scale difference. The method of adding the sampling point is to use an interpolation algorithm to process the waveform of two adjacent sampling points to ensure the validity of the waveform. However, when adding the sampling point, the time-scale difference between the added sampling point and the two adjacent sampling points before the addition is not less than the minimum preset time-scale difference.

[0070] If there are two adjacent sampling points whose time difference is less than the minimum preset time difference, the latter sampling point will be removed to ensure the validity of the waveform.

[0071] For example, the minimum preset timing difference may be, but is not limited to, half of the theoretical sampling timing difference, and the maximum preset timing difference may be, but is not limited to, 1.5 times of the theoretical sampling timing difference.

[0072] As a preferred embodiment, the wave recording server 12 includes a waveform data storage module and a characteristic waveform query module;

[0073] The waveform data storage module is used to store the waveform of each node recorded by each distributed wave recorder 11 according to time;

[0074] The characteristic waveform query module is used to package and compress the waveforms of each node of the configured distribution network at the fault triggering time.

[0075] In this embodiment, the functions of the recording server 12 are respectively completed by a waveform data storage module and a characteristic waveform query module. While realizing the storage of the waveforms of each node recorded by each distributed recorder 11 according to time and packaging and compressing the waveforms of each node of the configured distribution network at the fault triggering time, it also reduces the resource occupation of each module and improves efficiency.

[0076] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0077] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0078] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A characteristic waveform acquisition device for a configuration-based distribution network, characterized in that: include: A plurality of distributed wave recorders respectively arranged at each node of the configuration-type distribution network, used for recording the waveform of the node of the configuration-type distribution network at a preset frequency; A recording server connected to each of the distributed wave recorders is used to store the waveforms of each node recorded by each of the distributed wave recorders according to time, and to package and compress the waveforms of each node of the configured power distribution network at the time of fault triggering; A distribution network dynamic model scenario management system connected to the wave recording server, used to trigger a fault to the configured distribution network, send the fault trigger time to the wave recording server, and send the fault event to the wave recording query system; The wave recording query system connected to the wave recording server and the distribution network dynamic model scene management system is used to obtain the characteristic waveform of the node corresponding to the fault event from the waveform packaged and compressed by the wave recording server.

2. The characteristic waveform acquisition device for a configuration-based power distribution network according to claim 1, characterized in that: Also includes: The GPS timing system connected to each of the distributed wave recorders is used to obtain GPS precise timing and generate a timing pulse signal based on the GPS precise timing to adjust the clock of each of the distributed wave recorders to a clock consistent with the timing pulse signal.

3. The characteristic waveform acquisition device of the configuration-based power distribution network according to claim 2, characterized in that: The GPS timing system comprises: GPS antenna, used to obtain the GPS precise timing; The timing server connected to the GPS antenna is used to generate the timing pulse signal based on the GPS precise timing, and send the timing pulse signal to each of the distributed recorders to adjust the clock of each of the distributed recorders to a clock consistent with the timing pulse signal.

4. The characteristic waveform acquisition device for a configuration-based power distribution network according to claim 1, characterized in that: Also includes: The network switch arranged between each of the distributed wave recorders and the wave recording server is used to provide a channel for data interaction between the distributed wave recorders and the wave recording server.

5. The characteristic waveform acquisition device for a configuration-based power distribution network according to claim 1, characterized in that: The recording server is also used to control the startup of each of the distributed recorders based on user settings.

6. The characteristic waveform acquisition device for a configuration-based power distribution network according to claim 1, characterized in that: Also includes: The waveform calibration synthesis module connected to the wave recording query system is used to verify whether the frequencies of the characteristic waveforms of each node obtained by the wave recording query system are consistent, and if consistent, to perform time calibration processing on the sampling points of the waveform of each node so that the time difference between two adjacent sampling points in the waveform of each node is within a preset range.

7. The characteristic waveform acquisition device of the configuration-based power distribution network according to claim 6, characterized in that: The sampling points of the waveform of each node are time-scaled and calibrated so that the time-scale difference between two adjacent sampling points in the waveform of each node is within a preset range, including: Among the sampling points of the waveform of each node, the sampling points with the later time scale are eliminated among the two adjacent sampling points whose time scale difference is less than the minimum preset time scale difference, and a sampling point is added between the two adjacent sampling points whose time scale difference is greater than the maximum preset time scale difference using the interpolation algorithm.

8. The characteristic waveform acquisition device for a configuration-based power distribution network according to claim 1, characterized in that: The waveform recording server is specifically used to cyclically store the waveforms of each node recorded by each distributed waveform recorder according to the first-in-first-out principle in accordance with time, and to package and compress the waveforms of each node of the configured distribution network at the time of fault triggering.

9. The characteristic waveform acquisition device for a configuration-based power distribution network according to any one of claims 1 to 8, characterized in that: The wave recording server includes a waveform data storage module and a characteristic waveform query module; The waveform data storage module is used to store the waveform of each node recorded by each distributed wave recorder according to time; The characteristic waveform query module is used to package and compress the waveforms of each node of the configured power distribution network at the fault triggering time.

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