Method and system for automatically correcting installation information of line monitoring device

Abstract

The invention relates to a line monitoring device installation information automatic correction method and system. The method comprises the following steps: a master station issues a correction command and a correction moment to each monitoring device on a line; after receiving the correction command, the monitoring device returns current waveform data, longitude and latitude within a preset time to the master station; the master station extracts a current phase from the current waveform data; the main station corrects the monitoring device mounting pole tower according to the longitude and latitude of the monitoring device; and the master station corrects the installation direction and the installation phase of the monitoring device according to the current phase of the monitoring device. According to the invention, by establishing a set of automatic correction system for the installation information of the line monitoring device, unified issuing of correction commands at a master station end, automatic checking of installation towers, installation directions and installation phases of all the monitoring devices, and automatic correction of ledger configuration information in a master station database are realized, so that the problem of time and labor consumption in manual checking is solved; and the accuracy of power transmission line fault section judgment and fault positioning is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of on-line monitoring of power systems, and particularly to a method and system for automatically correcting installation information of line monitoring devices. Background Art

[0002] The distributed fault monitoring system for transmission lines consists of monitoring devices, a communication network, and a master station. The monitoring devices are distributed and installed on the transmission lines, generally near the poles and towers, and an installation point is arranged at a certain distance interval. For AC lines, one monitoring device is installed on each of the three-phase conductors A, B, and C at each installation point. The monitoring device collects the current waveforms on the conductors during faults and uploads them to the master station. The master station combines the line topology information to complete the discrimination of the fault section and fault location measurement. Among them, the discrimination of the fault section requires the use of the polarity information of the current waveforms of the same phase monitoring devices on both sides of the fault point, and the fault location measurement requires the use of the information of the poles and towers where the monitoring devices are installed. Therefore, obtaining the correct installation poles and towers, installation directions, and installation phases of the monitoring devices is very crucial for the accuracy of fault section discrimination and fault location measurement. When this system is applied in engineering, the account information of each monitoring device, including the installation poles and towers, installation directions, installation phases, etc. of the monitoring devices, needs to be configured in the database at the master station end. During the engineering implementation, the monitoring devices should be installed according to the installation information configured at the master station end to ensure that the configured information is completely consistent with the on-site situation. However, during the actual engineering implementation, affected by human factors, it is very difficult to ensure that each monitoring device can be installed in the correct position. For example, the installation directions and installation phases often have incorrect installation situations. Currently, there is a lack of on-line correction means for the installation information of the monitoring devices. If the installation information is incorrect, once a fault occurs on the line, the master station end will not be able to accurately determine the fault location. At this time, it is necessary to manually analyze the waveforms to verify whether the monitoring devices are installed correctly, and then modify the configuration information in the data. This method not only requires a large amount of manpower to check the installation information of the monitoring devices on each line, but also the master station will inevitably have incorrect fault location situations, seriously affecting the application effect of the distributed fault monitoring system. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to propose a method and system for automatically correcting installation information of line monitoring devices, so as to improve the accuracy rate of fault section discrimination and fault location of transmission lines.

[0004] Technical Solution: The present invention includes the following steps:

[0005] The master station sends a correction command and a correction time to each monitoring device on the line;

[0006] After receiving the correction command, the monitoring device uploads the current waveform data and longitude and latitude within a preset time to the master station;

[0007] The master station extracts the current phase from the current waveform data;

[0008] The master station corrects the pole tower where the monitoring device is installed according to the longitude and latitude of the monitoring device;

[0009] The master station corrects the installation direction and installation phase of the monitoring device according to the current phase of the monitoring device.

[0010] The monitoring devices are dispersedly installed at different pole towers of the line, and one monitoring device is installed on each of the three phases at the same installation point, and all the monitoring devices are installed in the same direction.

[0011] All the monitoring devices are equipped with a time synchronization system, and the master station issues a correction command with the same correction time to each monitoring device.

[0012] The current waveform data within the preset time is: the current waveform data with the correction time as the starting time and the preset time as the duration.

[0013] The master station corrects the pole tower where the monitoring device is installed according to the longitude and latitude of the monitoring device, which specifically includes:

[0014] The master station queries the longitude and latitude of the pole tower where the monitoring device is installed from the database, and respectively calculates the differences between the longitude and latitude transmitted back by the monitoring device and the longitude and latitude of the installed pole tower queried;

[0015] Judge whether the differences in longitude and latitude are not greater than the preset threshold: when it is judged that the differences in longitude and latitude are not greater than the preset threshold, it is considered that the actual installed pole tower of the monitoring device is consistent with the installed pole tower configured in the database and no correction is required;

[0016] When it is judged that at least one of the differences in longitude and latitude is greater than the preset threshold, then the differences between the longitude and latitude transmitted back by the monitoring device and the longitude and latitude of each pole tower in the line are calculated one by one. When the differences in longitude and latitude calculated for a certain pole tower are not greater than the preset threshold, the installed pole tower of the monitoring device in the database is corrected to this pole tower.

[0017] The basis for correcting the pole tower where the monitoring device is installed is: the monitoring device is installed close to the pole tower, the monitoring device obtains the longitude and latitude of the installation point through the time synchronization system, and the longitude and latitude of each pole tower are stored in the master station database. When the longitude and latitude obtained by the monitoring device are close to the longitude and latitude of the pole tower, it is considered that the monitoring device is installed on this pole tower.

[0018] The master station corrects the installation direction and installation phase of the monitoring device according to the current phase of the monitoring device, which specifically includes:

[0019] All the monitoring devices are divided into three groups, namely A, B, and C, according to the installation phase. Each group is further divided into several subgroups according to the principle of similar current phases. Determine the subgroup with the largest number of monitoring devices among the three groups of A, B, and C, and select any one monitoring device from this subgroup as the reference monitoring device;

[0020] Calculate the current phase difference between other monitoring devices and the reference monitoring device one by one, and select different correction methods according to the magnitude of the current phase difference.

[0021] The method of further dividing each group into several subgroups according to the principle of similar current phases is as follows: Assume the number of monitoring devices in this group is M, numbered as 1, 2, 3, ……, M. First, divide the number 1 into a separate group. For the monitoring device numbered i, where i = 2, 3, …, M, calculate its current phase difference with the monitoring device numbered j, where j = 1, 2, …, i - 1. If the current phase difference is within the range of (-Δδ, Δδ), (360° - Δδ, 360° + Δδ), or (-360° - Δδ, -360° + Δδ), then classify the number i into the group where the number j is located. If no monitoring device that meets the above current phase difference condition is found when j = i - 1, then classify the number i into a separate group, and so on.

[0022] The different correction methods include:

[0023] If the phase difference is within the range of (-Δδ, Δδ), (180° - Δδ, 180° + Δδ), or (-180° - Δδ, -180° + Δδ), then correct the installation phase of this monitoring device to the installation phase of the reference monitoring device. If the phase difference is within the range of (180° - Δδ, 180° + Δδ) or (-180° - Δδ, -180° + Δδ), then further correct the installation direction;

[0024] If the phase difference is within the range of (-120° - Δδ, -120° + Δδ) or (60° - Δδ, 60° + Δδ), then correct the installation phase of this monitoring device to the lagging phase of the installation phase of the reference monitoring device. If the phase difference is within the range of (60° - Δδ, 60° + Δδ), then further correct the installation direction;

[0025] If the phase difference is within the range of (-60° - Δδ, -60° + Δδ) or (120° - Δδ, 120° + Δδ), then correct the installation phase of this monitoring device to the leading phase of the installation phase of the reference monitoring device. If the phase difference is within the range of (-60° - Δδ, -60° + Δδ), then further correct the installation direction.

[0026] An automatic correction system for the installation information of line monitoring devices includes: a correction command issuing subsystem, an information receiving subsystem, an information processing subsystem, and an installation information correction subsystem;

[0027] The correction command issuing subsystem is used for the master station to issue correction commands and correction times to each monitoring device on the line;

[0028] An information receiving subsystem is used for the master station to receive the current waveform data and longitude and latitude within a preset time transmitted back by the monitoring device after receiving the calibration command.

[0029] An information processing subsystem is used for the master station to extract the current phase from the current waveform data.

[0030] An installation information calibration subsystem is used for the master station to calibrate the installation pole tower of the monitoring device according to the longitude and latitude of the monitoring device, and calibrate the installation direction and installation phase of the monitoring device according to the current phase of the monitoring device.

[0031] Beneficial effects: By establishing an automatic calibration system for the installation information of line monitoring devices, the present invention realizes the unified issuance of calibration commands at the master station end, automatically checks the installation pole towers, installation directions and installation phases of each monitoring device, and automatically corrects the account configuration information in the master station database, solves the time-consuming and laborious problems existing in manual checking, and significantly improves the accuracy of judging the fault section and locating the fault of the transmission line. Brief Description of the Drawings

[0032] Figure 1 is a flowchart of the present invention;

[0033] Figure 2 is a schematic diagram of the distributed fault monitoring system for transmission lines of the present invention;

[0034] Figure 3 is a flowchart for calibrating the installation pole tower of a monitoring device of the present invention;

[0035] Figure 4 is a flowchart for calibrating the installation direction and installation phase of a monitoring device of the present invention;

[0036] Figure 5 is a schematic diagram of the current phase of a monitoring device of the present invention;

[0037] Figure 6 is another schematic diagram of the current phase of a monitoring device of the present invention;

[0038] Figure 7 is a schematic diagram of the automatic calibration system for the installation information of line monitoring devices of the present invention. Detailed Embodiments

[0039] The present invention will be further described below with reference to the accompanying drawings.

[0040] Embodiment 1

[0041] As Figure 1 shown, an automatic calibration method for the installation information of line monitoring devices in this embodiment includes the following:

[0042] S110: The master station issues a calibration command and a calibration time to each monitoring device on the line

[0043] As Figure 2 shown, the distributed fault monitoring system for the transmission line includes monitoring devices 1, a communication network 2, and a master station 3. A plurality of monitoring devices 1 are all connected to the communication network 2, and the communication network 2 is connected to the master station 3. The plurality of monitoring devices 1 are dispersedly installed at different poles and towers of the line, and one monitoring device 1 is installed on each of the A, B, and C phases at the same installation point. All the monitoring devices 1 are installed in the same direction, for example, uniformly towards the direction of the larger-numbered pole and tower or uniformly towards the direction of the smaller-numbered pole and tower. The master station 3 is configured with a database, and the installation information of each monitoring device is stored in the database, at least including the installed pole and tower, installation direction, installed phase, and line pole and tower information. The line pole and tower information at least includes the pole and tower number, and the longitude and latitude of the pole and tower.

[0044] The calibration time is a certain time set artificially and later than the time when the calibration command is issued, and the calibration time sent by the master station 3 to each monitoring device 1 is the same time.

[0045] Each monitoring device 1 is configured with a time synchronization system. The master station 3 sends calibration commands with the same calibration time to each monitoring device 1, and the information of all the monitoring devices 1 at the same time section can be obtained.

[0046] S120: After receiving the calibration command, the monitoring device transmits the current waveform data and longitude and latitude within the preset time back to the master station

[0047] The current waveform data within the preset time is: the current waveform data with the calibration time as the starting time and the preset time as the duration.

[0048] S130: The master station extracts the current phase from the current waveform data

[0049] The current phase is calculated using the data of the first cycle in the current waveform data, and the calculation formula is:

[0050]

[0051] Among them, is the current phase of the mth monitoring device, and i m (k) is the kth current waveform data of the mth monitoring device, and N is the number of current waveform data in one cycle.

[0052] S140: The master station corrects the installed pole and tower of the monitoring device according to the longitude and latitude of the monitoring device. As Figure 3 shown, it specifically includes:

[0053] S141: The master station queries the longitude and latitude of the pole and tower where the monitoring device is installed from the database, and calculates the differences between the longitude and latitude transmitted back by the monitoring device and the longitude and latitude of the installed pole and tower queried respectively;

[0054] S142: Determine whether the differences in longitude and latitude are both not greater than a preset threshold;

[0055] When it is determined that the differences in longitude and latitude are both not greater than the preset threshold, then execute S142a: It is considered that the actual installation pole tower of the monitoring device is the same as the configured installation pole tower in the database, and no correction is required;

[0056] When it is determined that at least one of the differences in longitude and latitude is greater than the preset threshold, then execute S142b: Calculate the differences between the longitude and latitude transmitted back by the monitoring device and the longitude and latitude of each pole tower in the line one by one. When the differences in longitude and latitude calculated for a certain pole tower are both not greater than the preset threshold, correct the installation pole tower of the monitoring device in the database to this pole tower.

[0057] The basis for the above correction of the installation pole tower is: The monitoring device is installed close to the pole tower. The monitoring device obtains the longitude and latitude of the installation point through the time synchronization system. The longitude and latitude of each pole tower are stored in the main station database. When the longitude and latitude obtained by the monitoring device are close to the longitude and latitude of the pole tower, it can be considered that the monitoring device is installed on this pole tower.

[0058] The distance between two adjacent pole towers of the transmission line is generally more than 100 meters. To avoid misjudgment, the preset threshold for the differences in longitude and latitude should ensure that the corresponding distance is not greater than 50 meters. Preferably, this preset threshold can be set to 0.001 degrees.

[0059] S150: The main station corrects the installation direction and installation phase of the monitoring device according to the current phase of the monitoring device, as Figure 4 shown, specifically including:

[0060] S151: Divide all monitoring devices into three groups, A, B, and C, according to the installation phase. Each group is further divided into several subgroups according to the principle of similar current phases. Determine the subgroup with the largest number of monitoring devices among the three groups A, B, and C, and select any one monitoring device from this subgroup as the reference monitoring device.

[0061] The method for each group to be further divided into several subgroups according to the principle of similar current phases is: Assume that the number of monitoring devices in this group is M, and number them according to 1, 2, 3, ……, M. First, divide the number 1 into a separate group. For the monitoring device with the number i (i = 2, 3, …, M), calculate its current phase difference from the number j (j = 1, 2, …, i - 1) one by one. If the current phase difference is within the range of (-Δδ, Δδ), (360° - Δδ, 360° + Δδ) or (-360° - Δδ, -360° + Δδ), then classify the number i into the group where the number j is located, where Δδ is the preset error threshold. Preferably, the range that Δδ can take is (0°, 15°). If no monitoring device that satisfies the above current phase difference condition is found when j = i - 1, then divide the number i into a separate group, and so on.

[0062] S152: Calculate the current phase differences between other monitoring devices and the reference monitoring device one by one, and select different correction methods according to the magnitudes of the current phase differences, including:

[0063] S153a: If the phase difference is within the range of (-Δδ, Δδ), (180° - Δδ, 180° + Δδ), or (-180° - Δδ, -180° + Δδ), then go to S154;

[0064] S153b: If the phase difference is within the range of (-120° - Δδ, -120° + Δδ) or (60° - Δδ, 60° + Δδ), then go to S155;

[0065] S153c: If the phase difference is within the range of (-60° - Δδ, -60° + Δδ) or (120° - Δδ, 120° + Δδ), then go to S156.

[0066] S154: Correct the installation phase of this monitoring device to the installation phase of the reference monitoring device. If the phase difference is within the range of (180° - Δδ, 180° + Δδ) or (-180° - Δδ, -180° + Δδ), then further correct the installation direction.

[0067] The specific method for further correcting the installation direction is: If the original installation direction is pointing to the large - numbered tower, then correct it to point to the small - numbered tower; if the original installation direction is pointing to the small - numbered tower, then correct it to point to the large - numbered tower.

[0068] S155: Correct the installation phase of this monitoring device to the lagging phase of the installation phase of the reference monitoring device. If the phase difference is within the range of (60° - Δδ, 60° + Δδ), then further correct the installation direction.

[0069] The determination method for the lagging phase of the installation phase of the reference monitoring device is: If the installation phase of the reference monitoring device is phase A, then the lagging phase is phase B; if the installation phase of the reference monitoring device is phase B, then the lagging phase is phase C; if the installation phase of the reference monitoring device is phase C, then the lagging phase is phase A.

[0070] S156: Correct the installation phase of this monitoring device to the leading phase of the installation phase of the reference monitoring device. If the phase difference is within the range of (-60° - Δδ, -60° + Δδ), then further correct the installation direction.

[0071] The determination method for the leading phase of the installation phase of the reference monitoring device is: If the installation phase of the reference monitoring device is phase A, then the leading phase is phase C; if the installation phase of the reference monitoring device is phase B, then the leading phase is phase A; if the installation phase of the reference monitoring device is phase C, then the leading phase is phase B.

[0072] The basis for the above-mentioned correction of the installation direction and installation phase is as follows:

[0073] 1) The installation directions and installation phases of most monitoring devices are consistent with those configured in the master station database. Only a small number of monitoring devices may have installation errors. The reference monitoring devices selected by S151 are those with actual installation information consistent with the configuration information in the database.

[0074] 2) When the line is operating normally, as Figure 5 shown, the current flowing through the monitoring devices installed on the same-phase conductor is the same current. If the installation directions of the monitoring devices are the same, the current phases of the monitoring devices should be equal; the current phases between different phases are mutually different by 120°, and the current of phase A leads the current of phase B, the current of phase B leads the current of phase C, and the current of phase C leads the current of phase A. Therefore, after the reference monitoring devices are selected, using the above phase relationship, the correct installation phases and installation directions of other monitoring devices can be deduced.

[0075] As Figure 6 shown, the installation direction of monitoring device B2 is incorrect, and the installation phases of monitoring devices B3 and C3 are incorrect. The following describes the process of correcting the installation directions and installation phases of monitoring devices B2, B3, and C3 using the above method:

[0076] First, according to step S151, divide the monitoring devices A1, A2, A3, and A4 into group A, divide the monitoring devices B1, B2, B3, and B4 into group B, and divide the monitoring devices C1, C2, C3, and C4 into group C. The current phases of the 4 monitoring devices in phase A are all similar and are all divided into 1 group; the current phases of monitoring devices B1 and B4 in phase B are similar and are divided into 1 group, monitoring device B2 is divided into 1 group alone, and monitoring device B3 is divided into 1 group alone; the current phases of monitoring devices C1, C2, and C4 in phase C are similar and are divided into 1 group, and monitoring device C3 is divided into 1 group alone. It can be seen that the number of group monitoring devices in phase A is 4, which is the largest among all groups. Assume that A1 among them is the reference monitoring device.

[0077] For monitoring device B2, according to step S152, the phase difference between its current and that of monitoring device A1 is 60°. The condition of step S153b is satisfied. Then, according to step S155, the installation phase of monitoring device B2 should be phase B, and the installation direction needs to be corrected. It can be seen that after the above steps are processed, the problem of the incorrect installation direction of monitoring device B2 is automatically corrected.

[0078] For monitoring device B3, according to step S152, its current phase difference from monitoring device A1 is 120°. If the condition of S153c is satisfied, then according to step S156, the installation phase of monitoring device B3 is corrected to phase C. For monitoring device C3, according to step S152, its current phase difference from monitoring device A1 is -120°. If the condition of step S153b is satisfied, then according to step S155, the installation phase of monitoring device C3 is corrected to phase B.

[0079] It can be seen that after the above steps of processing, the problem of incorrect installation phases of monitoring devices B3 and C3 is automatically corrected.

[0080] Embodiment 2

[0081] As Figure 7 shown, an automatic correction system 700 for the installation information of a line monitoring device in this embodiment includes a correction command issuing subsystem 710, an information receiving subsystem 720, an information processing subsystem 730, and an installation information correction subsystem 740, where:

[0082] The correction command issuing subsystem 710 is used for the master station to issue correction commands and correction times to each monitoring device on the line.

[0083] The information receiving subsystem 720 is used for the master station to receive the current waveform data and longitude and latitude within a preset time returned by the monitoring device after receiving the correction command.

[0084] The information processing subsystem 730 is used for the master station to extract the current phase from the current waveform data.

[0085] The installation information correction subsystem 740 is used for the master station to correct the installation tower of the monitoring device according to the longitude and latitude of the monitoring device, and correct the installation direction and installation phase of the monitoring device according to the current phase of the monitoring device.

[0086] The automatic correction system 700 for the installation information of the line monitoring device performs a function similar to the method provided previously. Other functions can be referred to the previous description and will not be elaborated here.

[0087] Embodiment 3

[0088] This embodiment provides an electronic device, including a processor and a memory. The memory stores computer instructions. When the computer instructions are executed by the processor, the processor is caused to implement the method and refinement scheme provided previously when executing the computer instructions.

[0089] The above-described device embodiments are merely illustrative, and the devices disclosed in the present invention can also be implemented in other ways. For example, the division of units / modules in the above embodiments is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units, modules, or components can be combined, or can be integrated into another system, or some features can be ignored or not executed.

[0090] In addition, without special instructions, in each embodiment of the present invention, each functional unit / module can be integrated in one unit / module, or each unit / module can exist physically alone, or two or more units / modules can be integrated together. The above integrated unit / module can be implemented in the form of hardware or in the form of a software program module.

[0091] When the integrated unit / module is implemented in the form of hardware, the hardware can be a digital circuit, an analog circuit, etc. The physical implementation of the hardware structure includes but is not limited to transistors, memristors, etc. Without special instructions, the processor or chip can be any suitable hardware processor, such as CPU, GPU, FPGA, DSP, and ASIC, etc. Without special instructions, the on-chip cache, off-chip memory, and memory can be any suitable magnetic storage medium or magneto-optical storage medium, such as resistive random access memory RRAM (Resistive Random Access Memory), dynamic random access memory DRAM (Dynamic Random Access Memory), static random access memory SRAM (Static Random-Access Memory), enhanced dynamic random access memory EDRAM (Enhanced Dynamic Random Access Memory), high-bandwidth memory HBM (High-Bandwidth Memory), hybrid memory cube HMC (Hybrid Memory Cube), etc.

[0092] When the integrated unit / module is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a memory and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in various embodiments disclosed herein. The aforementioned memory includes: various media that can store program codes, such as USB flash drives, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), external hard drives, magnetic disks, or optical discs.

[0093] The embodiments of the present application further provide a non-transitory computer storage medium storing a computer program, which, when executed by multiple processors, causes the processors to execute the methods and refinement solutions provided above.

Claims

1. An automatic correction method for the installation information of a line monitoring device, characterized in that, It includes the following steps: The master station sends calibration commands and calibration times to each monitoring device on the line; After receiving the calibration command, the monitoring device transmits the current waveform data and longitude and latitude within a preset time back to the master station; The master station extracts the current phase from the current waveform data; The master station calibrates the pole tower where the monitoring device is installed according to the longitude and latitude of the monitoring device; The master station calibrates the installation direction and installation phase of the monitoring device according to the current phase of the monitoring device.

2. The automatic calibration method for the installation information of a line monitoring device according to claim 1, wherein, The monitoring devices are dispersedly installed at different pole towers on the line, and one monitoring device is installed on each of the three phases at the same installation point, and all the monitoring devices are installed in the same direction.

3. The automatic calibration method for the installation information of a line monitoring device according to claim 2, wherein, All the monitoring devices are equipped with a time synchronization system, and the master station sends calibration commands with the same calibration time to each monitoring device.

4. The automatic correction method for the installation information of a line monitoring device according to claim 1, wherein The current waveform data within the preset time is: the current waveform data starting from the calibration time and with a preset time duration.

5. The automatic correction method for the installation information of a line monitoring device according to claim 1, characterized in that, The master station calibrates the pole tower where the monitoring device is installed according to the longitude and latitude of the monitoring device, specifically including: The master station queries the longitude and latitude of the pole tower where the monitoring device is installed from the database, and calculates the differences between the longitude and latitude transmitted back by the monitoring device and the longitude and latitude of the installed pole tower queried respectively; Judge whether the above longitude and latitude differences are not greater than the preset threshold: when it is judged that the longitude and latitude differences are not greater than the preset threshold, it is considered that the actual installed pole tower of the monitoring device is consistent with the installed pole tower configured in the database and no correction is required; When it is judged that at least one of the longitude and latitude differences is greater than the preset threshold, then calculate the differences between the longitude and latitude transmitted back by the monitoring device and the longitude and latitude of each pole tower on the line one by one. When the calculated longitude and latitude differences of a certain pole tower are not greater than the preset threshold, correct the installed pole tower of the monitoring device in the database to this pole tower.

6. The automatic correction method for the installation information of a line monitoring device according to claim 5, characterized in that, The basis for calibrating the pole tower where the monitoring device is installed is: the monitoring device is installed close to the pole tower, the monitoring device obtains the longitude and latitude of the installation point through the time synchronization system, and the longitude and latitude of each pole tower are stored in the master station database. When the longitude and latitude obtained by the monitoring device are close to the longitude and latitude of the pole tower, it is considered that the monitoring device is installed on this pole tower.

7. A method for automatically correcting the installation information of a line monitoring device according to claim 1, characterized in that, The master station calibrates the installation direction and installation phase of the monitoring device according to the current phase of the monitoring device, specifically including: Divide all the monitoring devices into three groups, namely A, B, and C, according to the installation phase. Each group is further divided into several subgroups according to the principle of similar current phases. Determine the subgroup with the largest number of monitoring devices among the three groups of A, B, and C, and select any one monitoring device from this subgroup as the reference monitoring device; Calculate the current phase differences between other monitoring devices and the reference monitoring device one by one, and select different calibration methods according to the magnitudes of the current phase differences.

8. The automatic correction method for the installation information of a line monitoring device according to claim 7, characterized in that, The method of further dividing each group into several subgroups according to the principle of similar current phases is as follows: Assume the number of monitoring devices in this group is M, numbered as 1, 2, 3, ……, M. First, number 1 is separately divided into a group. For the monitoring device numbered i, where i = 2, 3, …, M, calculate its current phase difference with the monitoring devices numbered j, where j = 1, 2, …, i - 1, one by one. If the current phase difference is within the range of (-Δδ, Δδ), (360° - Δδ, 360° + Δδ), or (-360° - Δδ, -360° + Δδ), then number i is classified into the subgroup where number j is located. If no monitoring device satisfying the above current phase difference condition is found when j = i - 1, then number i is separately divided into a group, and so on.

9. The automatic correction method for the installation information of a line monitoring device according to claim 7, wherein The different calibration methods include: If the phase difference is within the range of (-Δδ, Δδ), (180° - Δδ, 180° + Δδ), or (-180° - Δδ, -180° + Δδ), then correct the installation phase of this monitoring device to the installation phase of the reference monitoring device. If the phase difference is within the range of (180° - Δδ, 180° + Δδ) or (-180° - Δδ, -180° + Δδ), then further correct the installation direction; If the phase difference is within the range of (-120° - Δδ, -120° + Δδ) or (60° - Δδ, 60° + Δδ), then correct the installation phase of this monitoring device to the lagging phase of the installation phase of the reference monitoring device. If the phase difference is within the range of (60° - Δδ, 60° + Δδ), then further correct the installation direction; If the phase difference is within the range of (-60° - Δδ, -60° + Δδ) or (120° - Δδ, 120° + Δδ), then correct the installation phase of this monitoring device to the leading phase of the installation phase of the reference monitoring device. If the phase difference is within the range of (-60° - Δδ, -60° + Δδ), then further correct the installation direction.

10. An automatic calibration system for the installation information of a line monitoring device, characterized in that, It includes: A calibration command issuing subsystem, an information receiving subsystem, an information processing subsystem, and an installation information calibration subsystem; The calibration command issuing subsystem is used for the master station to issue calibration commands and calibration times to each monitoring device on the line; The information receiving subsystem is used for the master station to receive the current waveform data and longitude and latitude within a preset time returned by the monitoring device after receiving the calibration command; The information processing subsystem is used for the master station to extract the current phase from the current waveform data; The installation information calibration subsystem is used for the master station to calibrate the installation tower of the monitoring device according to the longitude and latitude of the monitoring device, and calibrate the installation direction and installation phase of the monitoring device according to the current phase of the monitoring device.

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