Device and method for intensively studying and judging single-phase earth faults of primary and secondary fusion pole-mounted switch

Abstract

The invention belongs to the technical field of power distribution equipment, and particularly relates to a device and method for intensively studying and judging single-phase earth faults of a primary and secondary fusion pole-mounted switch. The method comprises the following steps: collecting a message uploaded by a primary and secondary fusion pole-mounted switch, automatically modifying the message into a distribution automation master station network layer automatic confirmation requirement, and obtaining a distribution automation master station application layer non-waiting confirmation frame message; the wave recording file compression module collects a wave recording file, compresses the wave recording file and then uploads the compressed wave recording file to the distribution automation master station application server; the wave recording file decompression module decompresses the received wave recording file and then transmits the wave recording file to the main station grounding fault studying and judging module; and analyzing the wave recording file, sending a result to a distribution automation master station application server, and carrying out primary and secondary fusion pole-mounted switch single-phase earth fault centralized research and judgment. According to the method, the single-phase grounding fault handling capacity of the primary and secondary fusion pole-mounted switch with the stock having the single-phase grounding research and judgment algorithm is improved, the power supply reliability of a 10-kilovolt power distribution network line is improved, and the fault handling time is effectively shortened.

Description

Technical Field

[0001] This invention belongs to the field of power distribution equipment technology, and in particular relates to a device and method for centralized analysis of single-phase grounding faults of primary and secondary integrated pole-mounted switches. Background Technology

[0002] The power distribution network is closely connected to users, and its complex structure and operating conditions make it prone to various faults. Single-phase grounding faults account for 70%-80% of these faults, and if they are not dealt with in a timely manner, they will have serious consequences.

[0003] The existing primary and secondary integrated pole-mounted switches have waveform recording function, but do not have single-phase grounding fault judgment algorithm. The centralized single-phase grounding fault judgment method is often applied to the single-phase grounding fault judgment of fault indicators with transient waveform recording function.

[0004] To further improve the ability of existing pole-mounted switches that lack single-phase grounding detection algorithms to handle single-phase grounding faults, continuous research and development by those skilled in the art is urgently needed. Summary of the Invention

[0005] To address the shortcomings of the existing technologies, this invention provides a centralized device and method for assessing single-phase grounding faults in primary and secondary integrated pole-mounted switches. The purpose is to enhance the fault handling capability of existing primary and secondary integrated pole-mounted switches with single-phase grounding assessment algorithms. By introducing a centralized device for assessing single-phase grounding faults in primary and secondary integrated pole-mounted switches, the invention aims to improve the power supply reliability of 10 kV distribution networks and shorten fault handling time.

[0006] The technical solution adopted by the present invention to achieve the above objectives is as follows:

[0007] A centralized method for assessing single-phase grounding faults in integrated primary and secondary pole-mounted switches includes:

[0008] Each frame of the message uploaded by the primary and secondary fusion pole-mounted switch is collected and automatically modified to meet the TCP automatic acknowledgment requirements of the distribution automation master station network layer. This results in the distribution automation master station application layer receiving frame messages that do not wait for acknowledgment, allowing the distribution automation master station to directly and automatically receive the waveform recording file.

[0009] The waveform recording file compression module collects waveform recording files, compresses them, and then uploads them to the power distribution automation master station application server.

[0010] The waveform recording file decompression module decompresses the received waveform recording file and transmits it to the main station grounding fault analysis module.

[0011] The main station grounding fault analysis module analyzes the received waveform files and sends the analysis results to the distribution automation main station application server for centralized analysis of single-phase grounding faults of pole-mounted switches in the primary and secondary integrated system.

[0012] Furthermore, the message relay module collects each frame of message uploaded by the primary and secondary fusion pole-mounted switches in accordance with the 101 or 104 protocol, and automatically changes the message waiting confirmation requirement to the automatic TCP confirmation requirement of the distribution automation master station network layer. This enables the distribution automation master station application layer to receive waveform recording files directly and automatically without waiting for confirmation frame messages. The message relay module 1 realizes the automatic conversion of message confirmation mode, and realizes the function of automatic reception of waveform recording files by the front-end server of the distribution automation master station without changing the functional modules within each primary and secondary fusion pole-mounted switch.

[0013] Furthermore, the waveform recording file sent from the primary and secondary integrated pole-mounted switch to the distribution automation master station front-end server should include waveform data of more than 5 cycles before the fault occurred and more than 10 cycles after the fault occurred.

[0014] Furthermore, the waveform data includes voltage, current, and switch position; wherein the voltage includes two line voltages and zero-sequence voltage, or three phase voltages; the current includes three-phase current and zero-sequence current, the recording delay is ≤20ms, the three-phase synchronization error is ≤100μs, each cycle includes 256 sampling points, and the instantaneous error of the maximum peak value of voltage and current is less than 10%.

[0015] Furthermore, the analysis of the received waveform file includes determining whether a single-phase grounding has occurred in the primary and secondary fusion pole-mounted switch that transmitted the waveform file, and providing the corresponding switch location information.

[0016] A centralized analysis of single-phase grounding fault devices using integrated primary and secondary pole-mounted switches is conducted, including:

[0017] The message relay module is used to collect each message frame uploaded by the primary and secondary fusion pole-mounted switch, automatically modify the message to meet the TCP automatic acknowledgment requirements of the distribution automation master station network layer, and obtain the distribution automation master station application layer no-wait-for-acknowledgment frame message, so that the distribution automation master station can directly and automatically receive the waveform file.

[0019] The waveform recording file compression module is used to compress the received waveform recording files before uploading them to the power distribution automation master station application server.

[0020] The waveform recording file decompression module is used to decompress the received waveform recording file and transmit it to the main station ground fault analysis module.

[0021] The main station grounding fault analysis module is used to analyze the received waveform files and send the analysis results to the distribution automation main station application server for centralized analysis of single-phase grounding faults of pole-mounted switches in the primary and secondary integrated system.

[0022] Furthermore, the message relay module collects each frame of message uploaded by the primary and secondary integrated pole-mounted switches in accordance with the 101 or 104 protocol, and automatically changes the message waiting confirmation requirement to the automatic TCP confirmation requirement of the distribution automation master station network layer, so that the application layer of the distribution automation master station does not wait for confirmation frame messages; the message relay module realizes the automatic conversion of message confirmation mode, and realizes the function of automatic reception of waveform files by the front-end server of the distribution automation master station without changing the functional modules within each primary and secondary integrated pole-mounted switch;

[0023] The waveform recording file sent from the primary and secondary integrated pole-mounted switch to the distribution automation master station front-end server should include waveform data of more than 5 cycles before the fault occurred and more than 10 cycles after the fault occurred.

[0024] The analysis of the received waveform file includes determining whether a single-phase grounding has occurred in the primary and secondary fusion pole-mounted switch that transmitted the waveform file, and providing the corresponding switch location information.

[0025] Furthermore, the waveform data includes voltage, current, and switch position; wherein the voltage includes two line voltages and zero-sequence voltage, or three phase voltages; the current includes three-phase current and zero-sequence current, the recording delay is ≤20ms, the three-phase synchronization error is ≤100μs, each cycle includes 256 sampling points, and the instantaneous error of the maximum peak value of voltage and current is less than 10%.

[0026] A computer device includes a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor. When the processor executes the computer program, it implements the steps of any of the methods for centralized assessment of single-phase grounding faults of primary and secondary integrated pole-mounted switches.

[0027] A computer storage medium storing a computer program, wherein when the computer program is executed by a processor, it implements the steps of any of the methods for centralized assessment of single-phase grounding faults of primary and secondary integrated pole-mounted switches.

[0028] The present invention has the following beneficial effects and advantages:

[0029] This invention enables automatic switching of message confirmation methods by setting up a message relay module, and realizes the function of automatic reception of waveform files by the front-end server of the power distribution automation master station without changing the internal functional modules of each primary and secondary integrated pole-mounted switch.

[0030] This invention enables the transmission of waveform recording files from the distribution automation master station front-end server to the distribution automation master station application server by setting a waveform recording file compression module. At the same time, it enables the analysis and judgment of waveform recording files in the master station ground fault analysis module by setting a decompression module.

[0031] This invention can improve the ability of existing pole-mounted switches with integrated primary and secondary grounding analysis algorithms to handle single-phase grounding faults. It introduces a centralized device for analyzing single-phase grounding faults of pole-mounted switches with integrated primary and secondary grounding analysis, which can improve the power supply reliability of 10 kV distribution network lines and shorten the fault handling time.

[0032] This invention innovatively enables centralized analysis of traditional single-phase grounding faults through a built-in server in the distribution automation master station, thus solving the problem of insufficient accuracy in on-site analysis by existing analysis equipment. Attached Figure Description

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0034] Figure 1 This is a schematic diagram of the structure of the device of the present invention;

[0035] Figure 2 This is a flowchart of the method of the present invention.

[0036] In the diagram: Message relay module 1, primary and secondary integrated pole-mounted switch 2, distribution automation master station front-end server 3, waveform recording file compression module 4, distribution automation master station application server 5, waveform recording file decompression module 6, master station grounding fault analysis module 7. Detailed Implementation

[0037] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0039] The following reference Figure 1 and Figure 2 The technical solutions of some embodiments of the present invention are described below.

[0040] Example 1

[0041] This invention provides an embodiment of a device for centralized analysis of single-phase grounding faults in a primary and secondary integrated pole-mounted switch. For example... Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the present invention.

[0042] The device of the present invention consists of a message relay module 1, a waveform recording file compression module 4, a waveform recording file decompression module 6, and a main station grounding fault analysis module 7.

[0043] The message relay module is used to convert the acknowledgment request method of each acquired message frame into an automatic acknowledgment request to obtain a waveform file;

[0044] By modifying the network layer TCP acknowledgment requirements in the power distribution automation master station, the power distribution automation master station no longer needs to wait for acknowledgment frame packets from the power distribution automation terminal, thus allowing the power distribution automation master station to directly remotely recall waveform files.

[0045] The waveform recording file compression module is used to compress the received waveform recording files before uploading them to the power distribution automation master station application server.

[0046] The waveform recording file decompression module is used to decompress the received waveform recording file and transmit it to the main station ground fault analysis module.

[0047] The main station grounding fault analysis module is used to analyze the received waveform files and send the analysis results to the distribution automation main station application server to realize centralized analysis of single-phase grounding faults of pole-mounted switches in the primary and secondary integration.

[0048] Example 2

[0049] This invention provides an embodiment of a device for centralized analysis of single-phase grounding faults in a primary and secondary integrated pole-mounted switch.

[0050] The message relay module 1 collects each frame of message uploaded by the primary and secondary fusion pole-mounted switches 2 using the 101 or 104 protocol, and automatically changes the message confirmation waiting requirement to the automatic TCP confirmation requirement of the distribution automation master station network layer, enabling the distribution automation master station application layer to not wait for confirmation frame messages. The message relay module 1 automatically switches the message confirmation method, enabling the distribution automation master station front-end server 3 to automatically receive waveform recording files without changing the functional modules within each primary and secondary fusion pole-mounted switch.

[0051] The waveform recording file compression module 4 compresses the waveform recording file while collecting the waveform recording file from the primary and secondary fusion pole-mounted switch 2 and sending it to the distribution automation master station front-end server 3, and simultaneously uploads the waveform recording file to the distribution automation master station application server 5.

[0052] The waveform recording file sent by the primary and secondary integrated pole-mounted switch 2 to the distribution automation master station front-end server 3 should include waveform data of more than 5 cycles before the fault occurrence and more than 10 cycles after the fault occurrence, specifically including voltage, current, switch position, etc.; wherein, the voltage includes two line voltages and zero-sequence voltage, or three phase voltages; the current includes three-phase current and zero-sequence current, the waveform recording delay is ≤20ms, the three-phase synchronization error is ≤100μs, and each cycle should include at least 256 sampling points, and the instantaneous error of the maximum peak value of voltage and current should be less than 10%.

[0053] The waveform recording file decompression module 6 collects the compressed waveform recording file from the distribution automation master station application server 5, performs decompression processing, and transmits it to the master station ground fault analysis module 7.

[0054] The main station grounding fault analysis module 7 analyzes the decompressed waveform file transmitted by the waveform file decompression module 6 and gives a conclusion on whether a single-phase grounding fault has occurred. At the same time, the conclusion is sent to the distribution automation main station application server 5 to realize centralized analysis of single-phase grounding faults of pole-mounted switches in the primary and secondary integration.

[0055] The results of the analysis of the recorded video file by the main station grounding fault judgment module 7 include whether a single-phase grounding has occurred in the primary and secondary fusion pole-mounted switch transmitting the video file and provide the corresponding switch location information.

[0056] Example 3

[0057] The present invention provides another embodiment, which is a device for centralized analysis of single-phase grounding faults of primary and secondary integrated pole-mounted switches.

[0058] The waveform data sent from the primary and secondary integrated pole-mounted switch 2 to the distribution automation master station front-end server 3 should be decompressed by the waveform file decompression module. The waveform data in the waveform file should include waveform data of more than 4 cycles before the fault occurred and more than 8 cycles after the fault occurred.

[0059] Everything else is the same as in Example 1.

[0060] Example 4

[0061] This invention provides another embodiment, which is a method for centralized assessment of single-phase grounding faults in primary and secondary integrated pole-mounted switches. This method utilizes the centralized assessment device for single-phase grounding faults in primary and secondary integrated pole-mounted switches shown in Examples 1-3. Figure 2 As shown, Figure 2 This is a flowchart of the method of the present invention, which specifically includes:

[0062] Step 1. Collect each frame of the message uploaded by the primary and secondary fusion pole-mounted switch, and automatically modify the message to meet the TCP automatic acknowledgment requirement of the distribution automation master station network layer, so as to obtain the distribution automation master station application layer no-wait-for-acknowledgment frame message.

[0063] Modify the network layer TCP acknowledgment requirements in the power distribution automation master station. Modify the requirements within the master station, and then the power distribution automation master station will no longer need to wait for acknowledgment frame packets from the power distribution automation terminals.

[0064] Step 2. The waveform recording file compression module collects the waveform recording file from Step 1, compresses it, and then uploads it to the distribution automation master station application server;

[0065] Step 3. The waveform recording file decompression module decompresses the received waveform recording file and transmits it to the main station ground fault analysis module;

[0066] Step 4. The main station grounding fault analysis module analyzes the received waveform files and sends the analysis results to the distribution automation main station application server to realize centralized analysis of single-phase grounding faults of pole-mounted switches in the primary and secondary integration.

[0067] The message relay module 1 collects each frame of message uploaded by the primary and secondary fusion pole-mounted switch 2 in accordance with the 101 or 104 protocol, and automatically changes the message waiting confirmation requirement to the automatic TCP confirmation requirement of the distribution automation master station network layer, so that the application layer of the distribution automation master station does not wait for confirmation frame messages; the message relay module 1 realizes the automatic conversion of message confirmation mode, and realizes the function of automatic reception of waveform files by the front-end server 3 of the distribution automation master station without changing the functional modules within each primary and secondary fusion pole-mounted switch.

[0068] The waveform recording file sent by the primary and secondary integrated pole-mounted switch 2 to the distribution automation master station front-end server 3 should include waveform data of more than 5 cycles before the fault occurred and more than 10 cycles after the fault occurred.

[0069] The waveform data includes voltage, current, and switch position; wherein the voltage includes two line voltages and zero-sequence voltage, or three phase voltages; the current includes three-phase current and zero-sequence current, the recording delay is ≤20ms, the three-phase synchronization error is ≤100μs, each cycle includes 256 sampling points, and the instantaneous error of the maximum peak value of voltage and current is less than 10%.

[0070] The analysis of the received waveform file includes determining whether a single-phase grounding has occurred in the primary and secondary fusion pole-mounted switch that transmitted the waveform file, and providing the corresponding switch location information.

[0071] Everything else is the same as in Example 1.

[0072] Example 5

[0073] Based on the same inventive concept, embodiments of the present invention also provide a computer device, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor. When the processor executes the computer program, it implements the steps of the centralized assessment method for single-phase grounding faults of primary and secondary integrated pole-mounted switches described in Embodiment 4.

[0074] Example 6

[0075] Based on the same inventive concept, this embodiment of the invention also provides a computer storage medium storing a computer program. When the computer program is executed by a processor, it implements the steps of the centralized assessment method for single-phase grounding faults of primary and secondary integrated pole-mounted switches described in Embodiment 4.

[0076] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0077] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0078] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0079] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for centralized analysis and judgment of single-phase grounding faults in integrated primary and secondary pole-mounted switches, characterized by: include: Each frame of the message uploaded by the primary and secondary fusion pole-mounted switch is collected and automatically modified to meet the TCP automatic acknowledgment requirements of the distribution automation master station network layer. This results in the distribution automation master station application layer receiving frame messages that do not wait for acknowledgment, allowing the distribution automation master station to directly and automatically receive the waveform recording file. The waveform recording file compression module collects waveform recording files, compresses them, and then uploads them to the power distribution automation master station application server. The waveform recording file decompression module decompresses the received waveform recording file and transmits it to the main station grounding fault analysis module. The main station grounding fault analysis module analyzes the received waveform files and sends the analysis results to the distribution automation main station application server for centralized analysis of single-phase grounding faults of pole-mounted switches in the primary and secondary integrated system.

2. The method for centralized assessment of single-phase grounding faults in primary and secondary integrated pole-mounted switches according to claim 1, characterized in that: The message relay module collects each message frame uploaded by the primary and secondary integrated pole-mounted switches in accordance with the 101 or 104 protocol, and automatically changes the message waiting confirmation requirement to the automatic TCP confirmation requirement of the distribution automation master station network layer. This enables the distribution automation master station application layer to receive waveform recording files directly and automatically without waiting for confirmation frames. The message relay module realizes the automatic conversion of message confirmation mode, and enables the distribution automation master station front-end server to automatically receive waveform recording files without changing the functional modules within each primary and secondary integrated pole-mounted switch.

3. The method for centralized assessment of single-phase grounding faults of primary and secondary integrated pole-mounted switches according to claim 2, characterized in that: The waveform recording file sent from the primary and secondary integrated pole-mounted switch to the distribution automation master station front-end server should include waveform data of more than 5 cycles before the fault occurred and more than 10 cycles after the fault occurred.

4. The method for centralized assessment of single-phase grounding faults of primary and secondary integrated pole-mounted switches according to claim 3, characterized in that: The waveform data includes voltage, current, and switch position; wherein the voltage includes two line voltages and zero-sequence voltage, or three phase voltages; the current includes three-phase current and zero-sequence current, the recording delay is ≤20ms, the three-phase synchronization error is ≤100μs, each cycle includes 256 sampling points, and the instantaneous error of the maximum peak value of voltage and current is less than 10%.

5. The method for centralized assessment of single-phase grounding faults in primary and secondary integrated pole-mounted switches according to claim 1, characterized in that: The analysis of the received waveform file includes determining whether a single-phase grounding has occurred in the primary and secondary fusion pole-mounted switch that transmitted the waveform file, and providing the corresponding switch location information.

6. A centralized analysis and assessment system for single-phase grounding faults in integrated primary and secondary pole-mounted switches, characterized by: include: The message relay module is used to collect each message frame uploaded by the primary and secondary fusion pole-mounted switch, automatically modify the message to meet the TCP automatic acknowledgment requirements of the distribution automation master station network layer, and obtain the distribution automation master station application layer no-wait-for-acknowledgment frame message, so that the distribution automation master station can directly and automatically receive the waveform file. The waveform recording file compression module is used to compress the received waveform recording files before uploading them to the power distribution automation master station application server. The waveform recording file decompression module is used to decompress the received waveform recording file and transmit it to the main station ground fault analysis module. The main station grounding fault analysis module is used to analyze the received waveform files and send the analysis results to the distribution automation main station application server for centralized analysis of single-phase grounding faults of pole-mounted switches in the primary and secondary integrated system.

7. The centralized assessment device for single-phase grounding faults of primary and secondary integrated pole-mounted switches according to claim 6, characterized in that: The message relay module collects each frame of message uploaded by the primary and secondary integrated pole-mounted switches in accordance with the 101 or 104 protocol, and automatically changes the message waiting confirmation requirement to the automatic TCP confirmation requirement of the distribution automation master station network layer, so that the application layer of the distribution automation master station does not wait for confirmation frame messages; the message relay module realizes the automatic conversion of message confirmation mode, and realizes the function of automatic reception of waveform files by the front-end server of the distribution automation master station without changing the functional modules within each primary and secondary integrated pole-mounted switch; The waveform recording file sent from the primary and secondary integrated pole-mounted switch to the distribution automation master station front-end server should include waveform data of more than 5 cycles before the fault occurred and more than 10 cycles after the fault occurred. The analysis of the received waveform file includes determining whether a single-phase grounding has occurred in the primary and secondary fusion pole-mounted switch that transmitted the waveform file, and providing the corresponding switch location information.

8. The centralized assessment device for single-phase grounding faults of primary and secondary integrated pole-mounted switches according to claim 7, characterized in that: The waveform data includes voltage, current, and switch position; wherein the voltage includes two line voltages and zero-sequence voltage, or three phase voltages; the current includes three-phase current and zero-sequence current, the recording delay is ≤20ms, the three-phase synchronization error is ≤100μs, each cycle includes 256 sampling points, and the instantaneous error of the maximum peak value of voltage and current is less than 10%.

9. A computer device, comprising a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method for centralized assessment of single-phase grounding faults of primary and secondary integrated pole-mounted switches as described in any one of claims 1-5.

10. A computer storage medium, characterized in that: The computer storage medium contains a computer program, which, when executed by a processor, implements the steps of the method for centralized assessment of single-phase grounding faults of primary and secondary integrated pole-mounted switches as described in any one of claims 1-5.

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