A monitoring system for fault of a traveling wave locating line and a method thereof

Abstract

The application discloses a kind of monitoring system and method for locating fault of traveling wave positioning line, by being equipped with traveling wave fault terminal monitoring device in specific line area, using the transient data signal sent to the specific area line both ends by line fault point, the time difference of signal received by traveling wave fault terminal monitoring device, and the length of specific area line, bring into line fault point calculation formula, determine the specific position of line fault point, the system includes traveling wave fault terminal monitoring device, GPS time-setting device, fault alarm display, DES encrypted signal processing device or virtual private network, server, on-line monitoring system, partition digital platform device and general control protection device.The application can improve the positioning and rapid troubleshooting efficiency of line fault, without electric power staff holding monitoring device to the site nearby to detect the line, reduce human power loss, ensure fault positioning accuracy, reduce line fault elimination cost.

Description

Technical Field

[0001] This invention relates to the field of a monitoring system for locating faults in a traveling wave circuit transmission system and a method for operating such a system, specifically to a monitoring system and method for locating faults in a traveling wave circuit transmission system. Background Technology

[0002] In the process of power transmission, achieving "early detection, early investigation, and early resolution" of faults in transmission lines has become crucial for reducing the total number of cable faults and improving lean operation and maintenance capabilities. This is especially true for high-voltage power transmission, where the high voltage levels and the destructive power of cable breakdowns can easily lead to major accidents. Existing online monitoring and fault location systems for cable lines work by calculating fault distance using breakdown discharge waveforms and capturing, collecting, and analyzing transient signals generated by insulation defects and faults in high-voltage cable lines. Combined with power frequency recording data, this enables effective monitoring, segmentation, and location of faults and defects in high-voltage cable lines. This provides technical support for the operation and maintenance management of high-voltage cable lines. Furthermore, by supplementing this with power frequency voltage recording for fault nature diagnosis, it can partially pinpoint the location of operational faults in the line.

[0003] However, existing cable line online monitoring and fault location systems have the following problems: They lack a line fault verification system, resulting in low fault location accuracy; if two or more line fault points occur in a given area, often only one can be diagnosed and located, requiring repair of one fault before secondary or multiple diagnoses can confirm other fault points; power workers also need to use handheld monitoring devices to inspect nearby lines, leading to significant manpower consumption and high costs for fault repair; and they cannot establish traceable line fault records and online video monitoring, resulting in poor reliability of cable line operation in different areas.

[0004] To address this, we have developed a traveling wave-based monitoring system and method for locating line faults. This system includes a line fault verification device to ensure accurate fault location. It can continuously and synchronously diagnose and locate two or more line fault points within a defined area. It can automatically analyze and collect monitoring data, eliminating the need for power workers to carry monitoring devices to the site. This improves work efficiency, shortens troubleshooting time, and reduces the cost of troubleshooting line faults. Summary of the Invention

[0005] This invention provides a monitoring system and method for locating line faults using traveling wave propagation, solving the problems existing in the use of current cable line online monitoring and fault location systems. This invention improves the efficiency of fault location and rapid troubleshooting, eliminating the need for power workers to manually inspect lines near the site, reducing manpower consumption, ensuring high fault location accuracy, lowering fault repair costs, and establishing traceable fault records and online video monitoring. This significantly improves the reliability of cable line operation in different areas and is suitable for widespread use in power transmission systems, especially high-voltage power transmission systems, as a monitoring and maintenance management system for locating line faults.

[0006] The technical solution adopted in this invention is as follows:

[0007] A traveling wave (TW) fault location monitoring system includes a TW terminal monitoring device. By setting up TW terminal monitoring devices within a specific line area, the fault point can simultaneously send transient data signals to the TW terminal monitoring devices at both ends of the line within that specific area. The system uses the time difference between the received signals by the two different TW terminal monitoring devices and the length of the line within the specific area where the two TW terminal monitoring devices are located to calculate the distances from the fault point to the two different TW terminal monitoring devices, thereby determining the specific location of the line fault point. The system also includes:

[0008] A line fault location verification device system that is compatible with this monitoring system.

[0009] The traveling wave positioning line fault monitoring system includes a traveling wave fault terminal monitoring device, a GPS timing device, a fault alarm display, a DES encrypted signal processing device or a virtual private network, a regional platform server, a central control platform server, an online monitoring system, a zoned digital display platform device, and a central control protection device. The traveling wave fault terminal monitoring devices are installed at both ends of a specific line area, and each device is connected to a GPS timing device and a fault alarm display. The devices are connected to the regional platform server via the DES encrypted signal processing device or a virtual private network. Different regional platform servers are connected to the zoned digital display platform devices via the online monitoring system. The zoned digital display platform devices are connected to the central control protection device via wiring harnesses. The regional platform server, the online monitoring system, and the zoned digital display platform devices are all connected to the central control platform server.

[0010] Each traveling wave fault terminal monitoring device is equipped with three traveling wave fault sensors. The three traveling wave fault sensors are respectively connected to the A / B / C three-phase harnesses of the corresponding area line via open-close sleeves. After the three traveling wave fault sensors are connected to the corresponding A / B / C three-phase harnesses, they are then connected to the traveling wave fault terminal monitoring device.

[0011] The central control platform server and online monitoring system are also connected to the line fault location verification device via wiring harnesses. The line fault location verification device is connected to the traveling wave fault terminal monitoring devices at both ends of each region. The line fault location verification device can send verification command signals to the traveling wave fault terminal monitoring devices, and verify the time difference between the time difference between the received signals by the different traveling wave fault terminal monitoring devices at both ends of the fault region through the verification command signals.

[0012] By establishing a line fault location verification device, a supporting central control platform server, an online monitoring system, and a traveling wave positioning line fault monitoring system, a line fault verification system is established. This system enables the entire system to have line fault verification device and corresponding line fault review and verification functions, ensuring high accuracy in fault location. This solves the problem that existing cable line online monitoring and fault location systems lack line fault verification device and have low fault location accuracy.

[0013] To ensure the proper functioning of the regional platform server within each zone and to guarantee the accuracy of the data collected by the regional platform server from the traveling wave fault terminal monitoring devices, GPS timing devices, and fault alarm displays in each zone, without any data acquisition deviations, the regional platform server is further connected to the traveling wave fault terminal monitoring devices at both ends of a specific line area via a zone cabling harness. This allows it to collect relevant data from the traveling wave fault terminal monitoring devices, GPS timing devices, and fault alarm displays in each zone and transmit the collected data to the central control platform server. The regional platform server is also connected to the online monitoring system via cabling harnesses.

[0014] The online monitoring system includes video surveillance equipment. This equipment is connected to a regional platform server via wiring harnesses, and also to a zone digital display platform device via wiring harnesses. The zone digital display platform device is connected to a central control platform server via wiring harnesses. The central control platform server can instruct the video surveillance equipment to monitor the regional platform server. The video surveillance equipment can transmit the data obtained from monitoring the regional platform server back to the zone digital display platform device. The central control platform server can instruct the zone digital display platform device to display the data obtained by the video surveillance equipment in real time, thereby verifying whether the corresponding regional platform server in each zone is working properly, and whether the data collected by the regional platform server from the traveling wave fault terminal monitoring device, GPS timekeeping device, and fault alarm display in each zone is accurate.

[0015] To ensure timely detection of short circuits or open circuits in the regional platform servers and connecting harnesses within a partition, and to guarantee normal connectivity and smooth, accurate transmission of monitoring information, the online monitoring system is further capable of monitoring short circuits or open circuits in the regional platform servers and connecting harnesses connected to it within the partition. The monitored information is then transmitted to the corresponding partition digital display platform device and the central control platform server, and displayed on the overall control display screen of the partition digital display platform device.

[0016] In order to enable the display and storage of information transmission data in different regions and at different levels, and to statistically analyze related records to provide basic data reserves for the subsequent establishment of traceable line fault records, the regional platform server can further record and statistically analyze the fault information of traveling wave fault terminal monitoring devices, GPS timing devices, and fault alarm displays in the corresponding connected zones, and transmit the recorded and statistical information to the corresponding zone digital display platform devices and the central control platform server for display and storage. This makes the basic data storage database for the subsequent establishment of traceable line fault records more complete and traceable.

[0017] To avoid reducing the accuracy of line fault location verification due to delays in line fault location verification commands, the line fault location verification device can be connected to traveling wave fault terminal monitoring devices at both ends of the area where the line fault location verification device is located, and each line fault location verification device in each area is connected to the online monitoring system and the central control platform server through a dedicated wiring harness.

[0018] The delay between the line fault location verification device transmitting the verification command signal and the traveling wave fault terminal monitoring device that first receives the fault traveling wave signal is no more than 20ns, so as to avoid reducing the accuracy of line fault location verification due to the delay of the line fault location verification command.

[0019] The time synchronization accuracy of the GPS time synchronization device is no greater than 20ns, ensuring high accuracy in the transmission time of transient data signals sent by the GPS time synchronization device at line fault points in the line.

[0020] To ensure that when a short circuit or open circuit occurs in the regional platform server and its connecting harness in one sub-area, the central control protection device can protect the regional platform servers in other sub-areas, and ensure normal signal data transmission between the regional platform servers in other sub-areas and the central control platform server, traveling wave fault terminal monitoring device, GPS time synchronization device, fault alarm display, etc., the line fault location verification device is further connected to the online monitoring system, central control protection device, and central control platform server through the central control connecting harness. If a short circuit or open circuit occurs in the regional platform server and its connecting harness in one sub-area, the central control protection device can protect the central control platform server, ensuring that the central control platform server can control the regional platform servers in other sub-areas. Simultaneously, it ensures that the online monitoring system continues to monitor the regional platform servers, traveling wave fault terminal monitoring device, GPS time synchronization device, and fault alarm display in the area where the fault occurred.

[0021] An online monitoring system within a given area is equipped with multiple video surveillance devices, which can perform real-time online monitoring of relevant servers, devices, and displays within the given area.

[0022] To explain the formula for calculating line fault points and make it easier to understand the basic principle of fault location in the traveling wave positioning line fault monitoring system method, the formula for calculating line fault points is further defined as L1 = [L - (t1 - t2)V] / 2.

[0023] Where L1 is the distance from the line fault point to the traveling wave fault terminal monitoring device at one end of the fault sub-region.

[0024] L is the distance between the traveling wave fault terminal monitoring devices at both ends of the sub-region to which the fault point belongs.

[0025] t1 is the time it takes for the traveling wave from the line fault point to travel to the traveling wave fault terminal monitoring device at one end of the fault sub-region.

[0026] t2 is the time it takes for the traveling wave from the line fault point to travel to the traveling wave fault terminal monitoring device at the other end of the fault sub-area.

[0027] V represents the speed at which the traveling wave propagates at the line fault point;

[0028] Wherein, when t1≥t2, L1 is the distance from the line fault point to the traveling wave fault terminal monitoring device at one end of the fault sub-region, and the line fault point calculation formula is L1=[L-(t1-t2)V] / 2; when t1<t2, L1 becomes L2, and L2 is the distance from the line fault point to the traveling wave fault terminal monitoring device at the other end of the fault sub-region, and the line fault point calculation formula becomes L2=[L-(t2-t1)V] / 2.

[0029] A method for a traveling wave-based fault location monitoring system includes the following steps:

[0030] The first step is that when a line fault occurs in a specific sub-area, the fault traveling wave sensor can collect the amplified transient traveling wave signal waveform data of the fault point and transmit the corresponding data to the traveling wave fault terminal monitoring device. At the same time, the line fault point can also transmit the corresponding fault point data to the acquisition system module in the traveling wave fault terminal monitoring device. All lines in the sub-area are connected to grounding wires and line protectors.

[0031] The second step involves the line fault point transmitting the corresponding fault point data to the acquisition system module of the traveling wave fault terminal monitoring device. At the same time, the GPS timing device connected to the line fault point can accurately record the time when the fault signal of the line fault point is transmitted to the traveling wave fault terminal monitoring devices at both ends of the line. Simultaneously, the fault alarm display can show the line fault alarm.

[0032] The third step involves the traveling wave fault terminal monitoring device transmitting the fault signal of the line fault point and the time data accurately recorded in the second step by the GPS timing device to the regional platform server via the DES encrypted signal processing device or virtual private network. The regional platform server can automatically calculate the specific location data of the line fault point according to the line fault point calculation formula. The regional platform server then transmits the obtained signal data to the online monitoring system, the partition digital display platform device, and the central control platform server.

[0033] The fourth step involves the central control platform server instructing the video surveillance equipment in the online monitoring system to monitor the regional platform server. Simultaneously, the central control platform server instructs the partition digital display platform device to display the data information obtained by the video surveillance equipment and the signal data obtained by the regional platform server on the overall control display screen of the partition digital display platform device in real time.

[0034] Fifth, the central control platform server instructs the online monitoring system and the line fault location verification device to perform verification work. The video monitoring equipment of the online monitoring system can perform video monitoring scans of the area and transmit the relevant verification scan signals to the central control platform server. Among them, the online monitoring system in a specific sub-area can have multiple video monitoring devices. At the same time, the line fault location verification device can send verification command signals to the traveling wave fault terminal monitoring device. The time difference between the received signals by the different traveling wave fault terminal monitoring devices at both ends of the fault area is used to verify the information again. The line fault location verification device then sends the verification information data back to the central control platform server.

[0035] The sixth step is that the central control platform server can automatically compare the verification information data returned by the line fault location verification device and the online monitoring system with the line fault point information data calculated and obtained by the regional platform server. If the two sets of information data are consistent after the comparison, the central control platform server will instruct the whole control display screen of the partition digital display platform device to display that the line fault point verification and location are accurate.

[0036] If the two sets of information data do not match after verification and comparison, the central control platform server will instruct the video monitoring equipment, regional platform server, traveling wave fault terminal monitoring device, and line fault location verification device of the line monitoring system to continue the work of the second, third, fourth, and fifth steps again until the two sets of information data match after verification and comparison, and the central control display screen of the partition digital display platform device shows that the line fault point verification and location are accurate.

[0037] Step 7: While the line fault location verification device sends a verification command signal to the traveling wave fault terminal monitoring device, the line fault location verification device, the video monitoring equipment in the online monitoring system, and the traveling wave fault terminal monitoring device can also monitor and verify whether the traveling wave received by the fault traveling wave sensor in the traveling wave fault terminal monitoring device is a composite wave. If it is a composite wave, the acquisition system module in the traveling wave fault terminal monitoring device can separate the composite wave. If two consecutive traveling waves are separated, it means there are two fault points in the area. If three consecutive traveling waves are separated, it means there are three fault points in the area, and so on. At the same time, the video monitoring equipment in the corresponding online monitoring system in the sub-area can perform detailed video monitoring of the fault area and transmit the relevant monitoring information data to the regional platform server and the central control platform server. The regional platform server calculates the specific location data of different line fault points by matching the corresponding line fault point calculation formula and transmits the relevant information data to the central control platform server. The central control platform server verifies the multi-point fault information data transmitted by the regional platform server with the detailed video monitoring information data of the video monitoring equipment in the online monitoring system and displays the verification results on the overall control display screen of the partition digital display platform device.

[0038] Compared with existing technologies, the beneficial effects of the present invention are as follows:

[0039] 1. By adopting a line fault location verification device, a supporting central control platform server, an online monitoring system, and a traveling wave positioning line fault monitoring system, a line fault verification system is established. This system enables the entire system to have a line fault verification system device and corresponding line fault review and verification functions, ensuring high fault location accuracy. This solves the problem that existing cable line online monitoring and fault location systems lack a line fault verification system device and have low fault location accuracy.

[0040] 2. This invention utilizes a line fault location verification device. Simultaneously, while transmitting verification command signals to the traveling wave fault terminal monitoring device, the line fault location verification device, the video monitoring equipment in the online monitoring system, and the traveling wave fault terminal monitoring device can also monitor the verification process. The fault traveling wave sensor in the traveling wave fault terminal monitoring device detects whether the traveling wave received is a composite wave. If it is a composite wave, the acquisition system module in the traveling wave fault terminal monitoring device can separate the composite wave. If two consecutive traveling waves are separated, it indicates two fault points in the area; if three consecutive traveling waves are separated, it indicates three fault points in the area, and so on. Simultaneously, the video monitoring equipment in the corresponding online monitoring system within each area can perform detailed video monitoring of the fault area and transmit relevant monitoring information data to the regional platform server and the central control platform server, which are then processed by the regional platform server. The device calculates and matches the corresponding line fault point calculation formula to automatically calculate the specific location data of different line fault points, and transmits the relevant information data to the central control platform server. The central control platform server then verifies the multi-point fault information data transmitted from the regional platform server with the detailed video monitoring information data from the video monitoring equipment in the online monitoring system, and displays the verification results on the overall control display screen of the zone digital display platform device. This solves the problem that when using the existing cable line online monitoring and fault location system, if there are two or more line fault points in a zone, it is often possible to diagnose and locate only one fault point. After repairing one fault point, a second or multiple diagnosis is required to confirm the other fault points. In addition, power workers need to carry the monitoring device to the vicinity of the site to inspect the line, which results in high manpower consumption and high cost of line fault troubleshooting.

[0041] 3. This invention utilizes a regional platform server to record and statistically analyze fault information from traveling wave fault terminal monitoring devices, GPS timing devices, and fault alarm displays within their corresponding connected zones. This recorded and statistical information is then transmitted to the corresponding zone-level digital display platform devices and the central control platform server for display and storage. This ensures that data transmission and information storage can be performed in a zoned and hierarchical manner, and that related records are statistically analyzed. This provides a foundational data reserve for establishing a traceable line fault record database, resulting in more comprehensive and traceable data. This invention solves the problem that existing cable line online monitoring and fault location systems cannot establish traceable line fault records and online video monitoring, leading to poor reliability of cable line operation in different areas.

[0042] Meanwhile, this invention utilizes a traveling wave positioning line fault monitoring system, which is based on video monitoring equipment and line fault location verification device in an online monitoring system, and a line fault location verification device system that matches the monitoring system. This system can automatically analyze and collect monitoring data, eliminating the need for power workers to carry monitoring devices to the site. This improves work efficiency, shortens troubleshooting time, and reduces line fault troubleshooting costs, making it suitable for widespread use in power companies for meter operation and maintenance management. Attached Figure Description

[0043] Figure 1 A schematic diagram of the overall process of a traveling wave positioning line fault monitoring system and method provided by the present invention;

[0044] Figure 2 A schematic diagram of the overall system connection of a traveling wave positioning line fault monitoring system and method provided by the present invention;

[0045] Figure 3 This is a schematic diagram illustrating the principle of calculating and locating line fault points in the traveling wave positioning line fault monitoring system of the present invention. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0047] The present invention will be further described in detail below with reference to the flowchart and specific implementation methods.

[0048] Reference Figure 1 、 Figure 2 and Figure 3 A traveling wave (TW) fault location monitoring system is disclosed. The system includes a TW terminal monitoring device. By setting up TW terminal monitoring devices within a specific line area, the fault point can simultaneously send transient data signals to the TW terminal monitoring devices at both ends of the line within that specific area. The system uses the time difference between the received signals by the two different TW terminal monitoring devices and the length of the line within the specific area with TW terminal monitoring devices at both ends as input into a fault point calculation formula to calculate the distances from the fault point to the two different TW terminal monitoring devices, thereby determining the specific location of the fault point. The system also includes:

[0049] A line fault location verification device system that is compatible with this monitoring system.

[0050] The traveling wave positioning line fault monitoring system includes a traveling wave fault terminal monitoring device, a GPS timing device, a fault alarm display, a DES encrypted signal processing device or a virtual private network, a regional platform server, a central control platform server, an online monitoring system, a zoned digital display platform device, and a central control protection device. The traveling wave fault terminal monitoring devices are installed at both ends of a specific line area, and each device is connected to a GPS timing device and a fault alarm display. The devices are connected to the regional platform server via the DES encrypted signal processing device or a virtual private network. Different regional platform servers are connected to the zoned digital display platform devices via the online monitoring system. The zoned digital display platform devices are connected to the central control protection device via wiring harnesses. The regional platform server, the online monitoring system, and the zoned digital display platform devices are all connected to the central control platform server.

[0051] Each traveling wave fault terminal monitoring device is equipped with three traveling wave fault sensors. The three traveling wave fault sensors are respectively connected to the A / B / C three-phase harnesses of the corresponding area line via open-close sleeves. After the three traveling wave fault sensors are connected to the corresponding A / B / C three-phase harnesses, they are then connected to the traveling wave fault terminal monitoring device.

[0052] The central control platform server and online monitoring system are also connected to the line fault location verification device via wiring harnesses. The line fault location verification device is connected to the traveling wave fault terminal monitoring devices at both ends of each region. The line fault location verification device can send verification command signals to the traveling wave fault terminal monitoring devices, and verify the time difference between the time difference between the received signals by the different traveling wave fault terminal monitoring devices at both ends of the fault region through the verification command signals.

[0053] By establishing a line fault location verification device, a supporting central control platform server, an online monitoring system, and a traveling wave positioning line fault monitoring system, a line fault verification system is established. This system enables the entire system to have line fault verification device and corresponding line fault review and verification functions, ensuring high accuracy in fault location. This solves the problem that existing cable line online monitoring and fault location systems lack line fault verification device and have low fault location accuracy.

[0054] To ensure the proper functioning of the regional platform server within each zone and to guarantee the accuracy of the data collected by the regional platform server from the traveling wave fault terminal monitoring devices, GPS timing devices, and fault alarm displays in each zone, without any data acquisition deviations, the regional platform server is further connected to the traveling wave fault terminal monitoring devices at both ends of a specific line area via a zone cabling harness. This allows it to collect relevant data from the traveling wave fault terminal monitoring devices, GPS timing devices, and fault alarm displays in each zone and transmit the collected data to the central control platform server. The regional platform server is also connected to the online monitoring system via cabling harnesses.

[0055] The online monitoring system includes video surveillance equipment. This equipment is connected to a regional platform server via wiring harnesses, and also to a zone digital display platform device via wiring harnesses. The zone digital display platform device is connected to a central control platform server via wiring harnesses. The central control platform server can instruct the video surveillance equipment to monitor the regional platform server. The video surveillance equipment can transmit the data obtained from monitoring the regional platform server back to the zone digital display platform device. The central control platform server can instruct the zone digital display platform device to display the data obtained by the video surveillance equipment in real time, thereby verifying whether the corresponding regional platform server in each zone is working properly, and whether the data collected by the regional platform server from the traveling wave fault terminal monitoring device, GPS timekeeping device, and fault alarm display in each zone is accurate.

[0056] To ensure timely detection of short circuits or open circuits in the regional platform servers and connecting harnesses within a partition, and to guarantee normal connectivity and smooth, accurate transmission of monitoring information, the online monitoring system is further capable of monitoring short circuits or open circuits in the regional platform servers and connecting harnesses connected to it within the partition. The monitored information is then transmitted to the corresponding partition digital display platform device and the central control platform server, and displayed on the overall control display screen of the partition digital display platform device.

[0057] In order to enable the display and storage of information transmission data in different regions and at different levels, and to statistically analyze related records to provide basic data reserves for the subsequent establishment of traceable line fault records, the regional platform server can further record and statistically analyze the fault information of traveling wave fault terminal monitoring devices, GPS timing devices, and fault alarm displays in the corresponding connected zones, and transmit the recorded and statistical information to the corresponding zone digital display platform devices and the central control platform server for display and storage. This makes the basic data storage database for the subsequent establishment of traceable line fault records more complete and traceable.

[0058] To avoid reducing the accuracy of line fault location verification due to delays in line fault location verification commands, the line fault location verification device can be connected to traveling wave fault terminal monitoring devices at both ends of the area where the line fault location verification device is located, and each line fault location verification device in each area is connected to the online monitoring system and the central control platform server through a dedicated wiring harness.

[0059] The delay between the line fault location verification device transmitting the verification command signal and the traveling wave fault terminal monitoring device that first receives the fault traveling wave signal is no more than 20ns, so as to avoid reducing the accuracy of line fault location verification due to the delay of the line fault location verification command.

[0060] The time synchronization accuracy of the GPS time synchronization device is no greater than 20ns, ensuring high accuracy in the transmission time of transient data signals sent by the GPS time synchronization device at line fault points in the line.

[0061] To ensure that when a short circuit or open circuit occurs in the regional platform server and its connecting harness in one sub-area, the central control protection device can protect the regional platform servers in other sub-areas, and ensure normal signal data transmission between the regional platform servers in other sub-areas and the central control platform server, traveling wave fault terminal monitoring device, GPS time synchronization device, fault alarm display, etc., the line fault location verification device is further connected to the online monitoring system, central control protection device, and central control platform server through the central control connecting harness. If a short circuit or open circuit occurs in the regional platform server and its connecting harness in one sub-area, the central control protection device can protect the central control platform server, ensuring that the central control platform server can control the regional platform servers in other sub-areas. Simultaneously, it ensures that the online monitoring system continues to monitor the regional platform servers, traveling wave fault terminal monitoring device, GPS time synchronization device, and fault alarm display in the area where the fault occurred.

[0062] An online monitoring system within a given area is equipped with multiple video surveillance devices, which can perform real-time online monitoring of relevant servers, devices, and displays within the given area.

[0063] To explain the formula for calculating line fault points and make it easier to understand the basic principle of fault location in the traveling wave positioning line fault monitoring system method, the formula for calculating line fault points is further defined as L1 = [L - (t1 - t2)V] / 2.

[0064] L1 is the distance from the line fault point to the traveling wave fault terminal monitoring device at one end of the fault sub-region, and L is the distance between the traveling wave fault terminal monitoring devices at both ends of the fault point sub-region.

[0065] t1 is the time it takes for the traveling wave from the line fault point to travel to the traveling wave fault terminal monitoring device at one end of the fault sub-region.

[0066] t2 is the time it takes for the traveling wave from the line fault point to travel to the traveling wave fault terminal monitoring device at the other end of the fault sub-area.

[0067] V represents the speed at which the traveling wave propagates at the line fault point;

[0068] Wherein, when t1≥t2, L1 is the distance from the line fault point to the traveling wave fault terminal monitoring device at one end of the fault sub-region, and the line fault point calculation formula is L1=[L-(t1-t2)V] / 2; when t1<t2, L1 becomes L2, and L2 is the distance from the line fault point to the traveling wave fault terminal monitoring device at the other end of the fault sub-region, and the line fault point calculation formula becomes L2=[L-(t2-t1)V] / 2.

[0069] A method for a traveling wave-based fault location monitoring system includes the following steps:

[0070] The first step is that when a line fault occurs in a specific sub-area, the fault traveling wave sensor can collect the amplified transient traveling wave signal waveform data of the fault point and transmit the corresponding data to the traveling wave fault terminal monitoring device. At the same time, the line fault point can also transmit the corresponding fault point data to the acquisition system module in the traveling wave fault terminal monitoring device. All lines in the sub-area are connected to grounding wires and line protectors.

[0071] The second step involves the line fault point transmitting the corresponding fault point data to the acquisition system module of the traveling wave fault terminal monitoring device. At the same time, the GPS timing device connected to the line fault point can accurately record the time when the fault signal of the line fault point is transmitted to the traveling wave fault terminal monitoring devices at both ends of the line. Simultaneously, the fault alarm display can show the line fault alarm.

[0072] The third step involves the traveling wave fault terminal monitoring device transmitting the fault signal of the line fault point and the time data accurately recorded in the second step by the GPS timing device to the regional platform server via the DES encrypted signal processing device or virtual private network. The regional platform server can automatically calculate the specific location data of the line fault point according to the line fault point calculation formula. The regional platform server then transmits the obtained signal data to the online monitoring system, the partition digital display platform device, and the central control platform server.

[0073] The fourth step involves the central control platform server instructing the video surveillance equipment in the online monitoring system to monitor the regional platform server. Simultaneously, the central control platform server instructs the partition digital display platform device to display the data information obtained by the video surveillance equipment and the signal data obtained by the regional platform server on the overall control display screen of the partition digital display platform device in real time.

[0074] Fifth, the central control platform server instructs the online monitoring system and the line fault location verification device to perform verification work. The video monitoring equipment of the online monitoring system can perform video monitoring scans of the area and transmit the relevant verification scan signals to the central control platform server. Among them, the online monitoring system in a specific sub-area can have multiple video monitoring devices. At the same time, the line fault location verification device can send verification command signals to the traveling wave fault terminal monitoring device. The time difference between the received signals by the different traveling wave fault terminal monitoring devices at both ends of the fault area is used to verify the information again. The line fault location verification device then sends the verification information data back to the central control platform server.

[0075] The sixth step is that the central control platform server can automatically compare the verification information data returned by the line fault location verification device and the online monitoring system with the line fault point information data calculated and obtained by the regional platform server. If the two sets of information data are consistent after the comparison, the central control platform server will instruct the whole control display screen of the partition digital display platform device to display that the line fault point verification and location are accurate.

[0076] If the two sets of information data do not match after verification and comparison, the central control platform server will instruct the video monitoring equipment, regional platform server, traveling wave fault terminal monitoring device, and line fault location verification device of the line monitoring system to continue the work of the second, third, fourth, and fifth steps again until the two sets of information data match after verification and comparison, and the central control display screen of the partition digital display platform device shows that the line fault point verification and location are accurate.

[0077] Step 7: While the line fault location verification device sends a verification command signal to the traveling wave fault terminal monitoring device, the line fault location verification device, the video monitoring equipment in the online monitoring system, and the traveling wave fault terminal monitoring device can also monitor and verify whether the traveling wave received by the fault traveling wave sensor in the traveling wave fault terminal monitoring device is a composite wave. If it is a composite wave, the acquisition system module in the traveling wave fault terminal monitoring device can separate the composite wave. If two consecutive traveling waves are separated, it means there are two fault points in the area. If three consecutive traveling waves are separated, it means there are three fault points in the area, and so on. At the same time, the video monitoring equipment in the corresponding online monitoring system in the sub-area can perform detailed video monitoring of the fault area and transmit the relevant monitoring information data to the regional platform server and the central control platform server. The regional platform server calculates the specific location data of different line fault points by matching the corresponding line fault point calculation formula and transmits the relevant information data to the central control platform server. The central control platform server verifies the multi-point fault information data transmitted by the regional platform server with the detailed video monitoring information data of the video monitoring equipment in the online monitoring system and displays the verification results on the overall control display screen of the partition digital display platform device.

[0078] Furthermore, each central control platform server in this invention can connect to N regional platform servers, line fault location verification devices, online monitoring systems, partition digital display platform devices, and central control protection devices within its respective sub-region, where N is a positive integer not less than 500. Simultaneously, each regional platform server within its sub-region can collect data signals from traveling wave fault terminal monitoring devices, GPS timing devices, fault alarm displays, and other devices within its sub-region, and transmit the relevant signal data to the central control platform server.

[0079] This invention addresses the shortcomings of existing cable line online monitoring and fault location systems: the lack of a line fault verification system, resulting in low fault location accuracy; in cases where two or more line faults occur within a given area, often only one can be diagnosed and located, requiring repair of one fault before secondary or multiple diagnoses can confirm other faults, necessitating power workers to physically inspect the lines on-site, leading to significant manpower consumption and high costs for fault repair; and the inability to establish traceable line fault records and online video monitoring, resulting in poor reliability of cable line operation in different areas.

[0080] This invention can improve the efficiency of locating and quickly troubleshooting line faults, eliminating the need for power workers to carry monitoring devices to the vicinity of the site to inspect the lines, reducing manpower consumption, ensuring high accuracy in fault location, lowering the cost of troubleshooting line faults, and establishing traceable line fault records and online video monitoring. This significantly improves the reliability of cable line operation in different areas and is suitable for widespread use in power transmission systems, especially high-voltage power transmission systems, as a monitoring and maintenance management system for locating line faults.

[0081] Meanwhile, this invention can improve the efficiency of meter fault diagnosis, eliminating the need for power workers to carry multimeters to the site to test whether the relevant meters and connecting harnesses have communication breaks. This reduces manpower and material costs and minimizes the impact of missing electricity data on the reliable operation of substations in different areas. It is suitable for widespread use in power companies for meter operation and maintenance management.

[0082] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A traveling wave fault location monitoring system, comprising a traveling wave fault terminal monitoring device, wherein the system has traveling wave fault terminal monitoring devices installed within a specific line area, and the line fault point can simultaneously send transient data signals to the traveling wave fault terminal monitoring devices at both ends of the line within the specific line area. The system uses the time difference between the received signals by the two different traveling wave fault terminal monitoring devices at both ends, and the length of the specific line area with traveling wave fault terminal monitoring devices at both ends, to calculate the distances from the fault point to the two different traveling wave fault terminal monitoring devices, thereby determining the specific location of the line fault point. The system is characterized in that... Also includes: A line fault location verification device system that is compatible with this monitoring system. The traveling wave positioning line fault monitoring system includes a traveling wave fault terminal monitoring device, a GPS timing device, a fault alarm display, a DES encrypted signal processing device or a virtual private network, a regional platform server, a central control platform server, an online monitoring system, a zoned digital display platform device, and a central control protection device. The traveling wave fault terminal monitoring devices are installed at both ends of a specific line area, and each device is connected to a GPS timing device and a fault alarm display. The devices are connected to the regional platform server via the DES encrypted signal processing device or a virtual private network. Different regional platform servers are connected to the zoned digital display platform devices via the online monitoring system. The zoned digital display platform devices are connected to the central control protection device via wiring harnesses. The regional platform server, the online monitoring system, and the zoned digital display platform devices are all connected to the central control platform server. Each traveling wave fault terminal monitoring device is equipped with three traveling wave fault sensors. The three traveling wave fault sensors are respectively connected to the A / B / C three-phase harnesses of the corresponding area line via open-close sleeves. After the three traveling wave fault sensors are connected to the corresponding A / B / C three-phase harnesses, they are then connected to the traveling wave fault terminal monitoring device. The central control platform server and the online monitoring system are also connected to the line fault location verification device via wiring harnesses. The line fault location verification device is connected to the traveling wave fault terminal monitoring devices at both ends of each area. The line fault location verification device can send a verification command signal to the traveling wave fault terminal monitoring device. The time difference between the time difference when the different traveling wave fault terminal monitoring devices at both ends of the fault area receive the signal is verified again through the verification command signal. The method of the traveling wave positioning line fault monitoring system specifically includes the following steps: The first step is that when a line fault occurs in a specific area, the fault traveling wave sensor can collect amplified traveling wave waveform data of the fault point and transmit the corresponding data to the traveling wave fault terminal monitoring device. At the same time, the line fault point can also transmit the corresponding fault point data to the acquisition system module in the traveling wave fault terminal monitoring device. The second step involves the line fault point transmitting the corresponding fault point data to the acquisition system module of the traveling wave fault terminal monitoring device. At the same time, the GPS timing device connected to the line fault point can accurately record the time when the fault signal of the line fault point is transmitted to the traveling wave fault terminal monitoring devices at both ends of the line. Simultaneously, the fault alarm display can show the line fault alarm. The third step involves the traveling wave fault terminal monitoring device transmitting the fault signal of the line fault point and the time data accurately recorded in the second step by the GPS timing device to the regional platform server via the DES encrypted signal processing device or virtual private network. The regional platform server can automatically calculate the specific location data of the line fault point according to the line fault point calculation formula. The regional platform server then transmits the obtained signal data to the online monitoring system, the partition digital display platform device, and the central control platform server. The fourth step involves the central control platform server instructing the video surveillance equipment in the online monitoring system to monitor the regional platform server. Simultaneously, the central control platform server instructs the partition digital display platform device to display the data information obtained by the video surveillance equipment and the signal data obtained by the regional platform server on the central control display screen of the partition digital display platform device in real time. Fifth, the central control platform server instructs the online monitoring system and the line fault location verification device to perform verification work. The video monitoring equipment of the online monitoring system can perform video monitoring scans of the area and transmit the relevant verification scan signals to the central control platform server. Among them, the online monitoring system in a specific sub-area can have multiple video monitoring devices. At the same time, the line fault location verification device can send verification command signals to the traveling wave fault terminal monitoring device. The time difference between the received signals by the different traveling wave fault terminal monitoring devices at both ends of the fault area is used to verify the information again. The line fault location verification device then sends the verification information data back to the central control platform server. The sixth step is that the central control platform server can automatically compare the verification information data returned by the line fault location verification device and the online monitoring system with the line fault point information data calculated and obtained by the regional platform server. If the two sets of information data are consistent after the comparison, the central control platform server will instruct the whole control display screen of the partition digital display platform device to display that the line fault point verification and location are accurate. If the two sets of information data do not match after verification and comparison, the central control platform server will instruct the video monitoring equipment, regional platform server, traveling wave fault terminal monitoring device, and line fault location verification device of the line monitoring system to continue the work of the second, third, fourth, and fifth steps again until the two sets of information data match after verification and comparison, and the central control display screen of the partition digital display platform device shows that the line fault point verification and location are accurate. Step 7: While the line fault location verification device sends a verification command signal to the traveling wave fault terminal monitoring device, the line fault location verification device, the video monitoring equipment in the online monitoring system, and the traveling wave fault terminal monitoring device can also monitor and verify whether the traveling wave received by the fault traveling wave sensor in the traveling wave fault terminal monitoring device is a composite wave. If it is a composite wave, the acquisition system module in the traveling wave fault terminal monitoring device can separate the composite wave. If two consecutive traveling waves are separated, it means there are two fault points in the area. If three consecutive traveling waves are separated, it means there are three fault points in the area, and so on. At the same time, the video monitoring equipment in the corresponding online monitoring system in the sub-area can perform detailed video monitoring of the fault area and transmit the relevant monitoring information data to the regional platform server and the central control platform server. The regional platform server calculates the specific location data of different line fault points by matching the corresponding line fault point calculation formula and transmits the relevant information data to the central control platform server. The central control platform server verifies the multi-point fault information data transmitted by the regional platform server with the detailed video monitoring information data of the video monitoring equipment in the online monitoring system and displays the verification results on the overall control display screen of the partition digital display platform device.

2. The monitoring system for traveling wave positioning circuit faults according to claim 1, characterized in that... The regional platform server is connected to the traveling wave fault terminal monitoring devices at both ends of a specific line area via partitioned wiring harnesses. It can collect relevant data information from the traveling wave fault terminal monitoring devices, GPS timing devices, and fault alarm displays in each partition, and transmit the collected data information to the central control platform server. The regional platform server is also connected to the online monitoring system via wiring harnesses. The online monitoring system includes video surveillance equipment. This equipment is connected to a regional platform server via wiring harnesses, and also to a zone digital display platform device via wiring harnesses. The zone digital display platform device is connected to a central control platform server via wiring harnesses. The central control platform server can instruct the video surveillance equipment to monitor the regional platform server. The video surveillance equipment can transmit the data obtained from monitoring the regional platform server back to the zone digital display platform device. The central control platform server can instruct the zone digital display platform device to display the data obtained by the video surveillance equipment in real time, thereby verifying whether the corresponding regional platform server in each zone is working properly, and whether the data collected by the regional platform server from the traveling wave fault terminal monitoring device, GPS timekeeping device, and fault alarm display in each zone is accurate.

3. The monitoring system for traveling wave positioning circuit faults according to claim 1, characterized in that... The online monitoring system can monitor the regional platform server and connecting harness within the connected partition for short circuits or open circuits, and transmit the monitored information to the corresponding partition digital display platform device and the central control platform server, and display it on the overall control display screen of the partition digital display platform device.

4. A monitoring system for traveling wave positioning circuit faults according to any one of claims 1 to 3, characterized in that... The regional platform server can record and statistically analyze the fault information of the traveling wave fault terminal monitoring device, GPS timing device, and fault alarm display in the corresponding connected partition, and transmit the recorded and statistical information to the corresponding partition digital display platform device and the central control platform server for display and storage.

5. The monitoring system for traveling wave positioning circuit faults according to claim 1, characterized in that... The line fault location verification device can be connected to the traveling wave fault terminal monitoring devices at both ends of the area where the line fault location verification device is located. Each line fault location verification device in each area is connected to the online monitoring system and the central control platform server through a dedicated wiring harness. The delay between the line fault location verification device transmitting the verification command signal and the traveling wave fault terminal monitoring device that first receives the fault traveling wave signal is no more than 20ns. The time synchronization accuracy of the GPS time synchronization device is no greater than 20 ns.

6. The monitoring system for traveling wave positioning circuit faults according to claim 1, characterized in that... The line fault location and verification device is connected to the online monitoring system, the central control protection device, and the central control platform server via the central control connection harness. If a short circuit or open circuit occurs in the regional platform server and the connection harness in a sub-area, the central control protection device can protect the central control platform server, ensuring that the central control platform server can control the regional platform servers in other sub-areas. At the same time, it can ensure that the online monitoring system continues to monitor the regional platform servers, traveling wave fault terminal monitoring devices, GPS timing devices, and fault alarm displays in the area where the fault occurs.

7. A monitoring system for traveling wave positioning circuit faults according to claim 1, characterized in that... The formula for calculating the line fault point is L1=[L-(t1-t2)V] / 2; Where L1 is the distance from the line fault point to the traveling wave fault terminal monitoring device at one end of the fault sub-region. L is the distance between the traveling wave fault terminal monitoring devices at both ends of the sub-region to which the fault point belongs. t1 is the time it takes for the traveling wave from the line fault point to travel to the traveling wave fault terminal monitoring device at one end of the fault sub-region. t2 is the time it takes for the traveling wave from the line fault point to travel to the traveling wave fault terminal monitoring device at the other end of the fault sub-area. V represents the speed at which the traveling wave propagates from the line fault point.

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