Radio interference noise reduction method and system for high-altitude direct-current transmission line

Abstract

The invention discloses a radio interference noise reduction method and system for a high-altitude direct-current transmission line, and the method comprises the steps: arranging a specified number of radio interference measurement antennas; determining radio interference attenuation; when the direct current transmission line is in a live-line state, the measurement starting time and the measurement ending time of the radio interference at different positions are kept synchronous, the radio interference measurement antenna is measured, and a radio interference measurement result is obtained; in the test, preprocessing each group of radio interference measurement results, judging whether test data is valid or not, if so, retaining the group of data, and if not, deleting the group of data; performing real-time analysis on the preprocessed effective test result, and determining a background radio interference level, namely a background interference value, based on radio interference attenuation; and subtracting the background interference value from the current radio interference measurement value to obtain an actual corona radio interference level of the power transmission line, and storing the actual corona radio interference level.

Description

Technical Field

[0001] The present invention relates to the technical field of radio interference of power transmission lines, and more particularly to a method and system for reducing radio interference noise of high-altitude direct current transmission lines. Background Art

[0002] With the rapid development of social economy, people are paying more and more attention to environmental protection, especially the radio interference of DC transmission lines. This requires a scientific and accurate prediction of the radio interference after the DC line is completed and put into operation at the beginning of line design.

[0003] Two common approaches are currently used to reduce radio interference noise on transmission lines. The first involves deenergizing the test line segment or actual line before testing, measuring the radio interference background level at the test point, then boosting the line voltage to the test voltage. The actual radio interference is then determined by subtracting the background interference from the radio interference test result. However, this method is only suitable for areas with a relatively constant radio interference background. If the background radio interference randomly changes during the test, it cannot be effectively filtered out. Furthermore, since temporary power outages are not possible on actual lines, this method is also unsuitable for operating DC transmission lines. The second approach involves placing a radio interference background measurement antenna and instrument away from the test line segment or actual line, recording the background interference in real time during the test. However, this method has the disadvantage that, to prevent the radio interference generated by the transmission line from affecting the background measurement, the background measurement equipment must be located far away from the transmission line. However, there is uncertainty as to whether the radio interference background level at this location will be consistent with the radio interference level directly below the line. Summary of the Invention

[0004] According to the present invention, a method and system for reducing radio interference noise in a high-altitude DC transmission line are provided to solve the technical problem that background interference seriously affects test results during radio interference testing of DC transmission lines.

[0005] According to a first aspect of the present invention, a method for reducing radio interference noise in a high-altitude DC transmission line is provided, comprising:

[0006] On the ground below the DC line, with the projection of the positive line conductor to the ground as the origin, a specified number of radio interference measurement antennas are arranged perpendicular to the line path toward the outside of the positive pole;

[0007] Determine the radio interference attenuation based on the origin and measurement point through the attenuation characteristics of radio interference during spatial propagation;

[0008] When the DC transmission line is energized, the start and end times of radio interference measurements at different locations are kept synchronized, the radio interference measurement antenna is measured, and the radio interference measurement results are obtained;

[0009] During the test, each set of radio interference measurement results is pre-processed to determine whether the test data is valid. If valid, the set of data is retained to obtain a valid test result after pre-processing. If invalid, the set of data is deleted.

[0010] Perform real-time analysis on the valid test results after preprocessing and determine the background radio interference level, i.e., the background interference value, based on the radio interference attenuation;

[0011] The background interference value is subtracted from the current radio interference measurement value to obtain the actual corona radio interference level of the transmission line and store it.

[0012] Optionally, the radio interference attenuation amount is determined based on the origin and the measurement point according to the attenuation characteristics of the radio interference during spatial propagation, including:

[0013] The radio interference attenuation is determined based on the origin and the measurement point according to the following formula:

[0014] Δ AB =k(lgD A -lgD B )

[0015] Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and D A D is the direct distance from the conductor to the measuring point A. B is the direct distance from the conductor to measuring point B, and k is the distance attenuation coefficient.

[0016] Optionally, during the test, each set of radio interference measurement results is preprocessed to determine whether the test data is valid. If valid, the set of data is retained to obtain a valid test result after preprocessing; if invalid, the set of data is deleted, including:

[0017] The determination of valid test data meets the following conditions:

[0018] 1) The radio interference test value at the bottom of the positive line, that is, the origin, is the largest. As the distance from the positive line increases, the radio interference test result gradually decreases;

[0019] 2) The radio interference results of two adjacent measurement points satisfy the following relationship

[0020]

[0021] Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and RI A is the radio interference measurement result at location 1, RI B is the radio interference measurement result at position B, D1 and D2 are the direct distances of position A and position B from the positive conductor respectively.

[0022] Optionally, performing real-time analysis on the pre-processed valid test results to determine the background radio interference level, i.e., the background interference value, based on the radio interference attenuation, includes:

[0023] Substitute the effective test results of measurement point A and measurement point B into the following formula to determine the background radio interference RI 背 :

[0024]

[0025] Where, RI, RI B The radio interference test results at positions A and B are RI 背 is the background radio interference level, that is, the background interference value.

[0026] Optionally, subtracting a background interference value from a current radio interference measurement value to obtain an actual corona radio interference level of the transmission line and storing the obtained value, including:

[0027] The actual corona radio interference level of the transmission line is calculated according to the following formula:

[0028]

[0029] In the formula, RI 测 is the measured value, RI 背 is the background value, RI 实 is the actual radio interference value.

[0030] According to another aspect of the present invention, a high-altitude DC transmission line radio interference noise reduction system is provided, comprising:

[0031] Arrange the measurement antenna module to arrange a specified number of radio interference measurement antennas on the ground below the DC line, with the projection of the positive line conductor on the ground as the origin, perpendicular to the line path and toward the outside of the positive pole;

[0032] An interference attenuation determination module is used to determine the radio interference attenuation based on the origin and the measurement point according to the attenuation characteristics of the radio interference during the spatial propagation process;

[0033] Obtaining interference measurement result module, used for synchronizing the start and end time of radio interference measurement at different locations when the DC transmission line is energized, measuring the radio interference measurement antenna, and obtaining radio interference measurement results;

[0034] The test result judgment module is used to pre-process each set of radio interference measurement results in the test, judge whether the test data is valid, if valid, retain the set of data and obtain the valid test results after pre-processing; if invalid, delete the set of data;

[0035] A background interference determination module is used to perform real-time analysis on the valid test results after preprocessing and determine the background radio interference level, i.e., the background interference value, based on the radio interference attenuation;

[0036] The actual interference obtaining module is used to subtract the background interference value from the current radio interference measurement value to obtain the actual corona radio interference level of the transmission line and store it.

[0037] Optionally, the interference attenuation determination module includes:

[0038] The interference attenuation quantum determination module is used to determine the radio interference attenuation based on the origin and the measurement point according to the following formula:

[0039] Δ AB =k(lgD A -lgD B )

[0040] Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and D A D is the direct distance from the conductor to the measuring point A. B is the direct distance from the conductor to measuring point B, and k is the distance attenuation coefficient.

[0041] Optionally, the test result determination module includes:

[0042] The test result determination condition submodule is used to determine whether the test valid data meets the following conditions:

[0043] 1) The radio interference test value at the bottom of the positive line, that is, the origin, is the largest. As the distance from the positive line increases, the radio interference test result gradually decreases;

[0044] 2) The radio interference results of two adjacent measurement points satisfy the following relationship:

[0045]

[0046] Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and RI A is the radio interference measurement result at location 1, RI B is the radio interference measurement result at position B, D1 and D2 are the direct distances of position A and position B from the positive conductor respectively.

[0047] Optionally, determining a background interference module includes:

[0048] The background interference determination submodule is used to substitute the effective test results of measurement point A and the effective test results of measurement point B into the following formula to determine the background radio interference level RI 背 :

[0049]

[0050] Where, RI, RI B The radio interference test results at positions A and B are RI 背 is the background radio interference level, that is, the background interference value.

[0051] Optionally, obtaining an actual interference module includes:

[0052] The actual interference value submodule calculates the actual corona radio interference level of the transmission line according to the following formula:

[0053]

[0054] In the formula, RI 测 is the measured value, RI 背 is the background value, RI 实 is the actual radio interference value.

[0055] According to another aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the steps of any of the above methods are implemented.

[0056] According to another aspect of the present invention, there is provided an electronic device, comprising:

[0057] The computer-readable storage medium recited in the claims; and

[0058] One or more processors are configured to execute the program in the computer-readable storage medium.

[0059] By applying radio interference propagation theory to DC transmission lines and combining it with experimental verification, a method has been proposed for simultaneously and in real time filtering out background interference from DC line corona radio interference during testing. This method effectively ensures the authenticity and validity of data during corona radio interference measurements. This method addresses the current inability of common methods to filter out background interference in real time during transmission line radio interference measurements. This method is particularly applicable when environmental background interference is persistent and stable. In practical use, this method is more accurate and simpler than other methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0061] Figure 1 This is a flow chart of a method for reducing radio interference noise in a high-altitude DC transmission line according to this embodiment;

[0062] Figure 2 This is a schematic diagram of a method for reducing radio interference noise in a high-altitude DC transmission line according to this embodiment;

[0063] Figure 3 This is a schematic diagram of arranging radio interference measurement antennas according to this embodiment;

[0064] Figure 4 This is a schematic diagram of radio interference before background interference removal according to this embodiment;

[0065] Figure 5 is a schematic diagram of radio interference after background interference removal according to this embodiment;

[0066] Figure 6 Schematic diagram of a system for reducing radio interference noise in high-altitude DC transmission lines according to this embodiment. DETAILED DESCRIPTION

[0067] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a thorough and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments shown in the accompanying drawings is not intended to limit the present invention. In the accompanying drawings, identical elements are denoted by the same reference numerals.

[0068] Unless otherwise specified, the terms used herein (including technical terms) have the meanings commonly understood by those skilled in the art. In addition, it is understood that terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0069] According to a first aspect of the present invention, a method 100 for reducing radio interference noise in a high altitude DC transmission line is provided. Figure 1 As shown, the method 100 includes:

[0070] S101: On the ground below the DC line, with the projection of the positive line conductor on the ground as the origin, arrange a specified number of radio interference measurement antennas perpendicular to the line path toward the outside of the positive pole;

[0071] S102: Determine the radio interference attenuation amount based on the origin and the measurement point according to the attenuation characteristics of the radio interference during spatial propagation;

[0072] S103: When the DC transmission line is energized, synchronize the start and end times of radio interference measurement at different locations, measure the radio interference measurement antenna, and obtain radio interference measurement results;

[0073] S104: During the test, pre-process each set of radio interference measurement results to determine whether the test data is valid. If valid, retain the set of data to obtain a valid test result after pre-processing. If invalid, delete the set of data.

[0074] S105: Analyze the valid test results after preprocessing in real time, and determine the background radio interference level, i.e., the background interference value, based on the radio interference attenuation;

[0075] S106: Subtract the background interference value from the current radio interference measurement value to obtain the actual corona radio interference level of the transmission line and store it.

[0076] Specifically, refer to Figure 2 As shown, a specified number of radio interference measurement antennas should be placed on the ground below the DC line. It is recommended that the projection of the positive conductor on the ground be used as the origin, and radio interference antennas be placed perpendicular to the line path, outward from the positive pole. Two or more antennas should be placed. The point below the positive conductor is a mandatory measurement point, with recommended placement locations at 0, +20m, +30m, etc. To ensure the farthest radio interference antenna can detect the radio interference value, the farthest antenna should be no more than 50m from the origin.

[0077] The attenuation characteristics of radio interference antennas in the process of space propagation are used to determine the radio interference attenuation in an ideal environment. The radio interference attenuation satisfies

[0078] Δ AB =k(lgD A -lgD B )

[0079] Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and D A D is the direct distance from the conductor to the measuring point A. B is the direct distance from the conductor to measurement point B, and k is the distance attenuation coefficient. The value of k varies depending on environmental conditions, generally determined through experimentation. The recommended range for this invention is: 0.15-0.4 MHz, k is 34-38, and 0.5-30 MHz, k is 30-36.

[0080] With the DC transmission line energized, all radio interference antennas will conduct simultaneous measurements between 0.15 and 30 MHz. The start and end times of radio interference measurements at different locations should be synchronized, using a 9 kHz frequency band and quasi-peak detection.

[0081] During the test, each set of radio interference measurement results is pre-processed to determine whether the test data is valid. If valid, the set of data is retained; if invalid, the set of data is deleted.

[0082] The principles for determining valid data should meet the following two requirements.

[0083] The radio interference test value at the position below the positive wire (origin) is the largest, and as the distance from the positive wire increases, the radio interference test result gradually decreases;

[0084] The radio interference results of two adjacent measuring points should satisfy the following relationship

[0085]

[0086] Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and RI A is the radio interference measurement result at location 1, RI B is the radio interference measurement result at position B, D1 and D2 are the direct distances of position A and position B from the positive conductor respectively.

[0087] Conduct real-time analysis on the valid test results after pre-processing to determine the background interference level of radio interference;

[0088] Substituting the radio interference results at two locations in the valid data into the following formula, the background radio interference RI can be determined 背 .

[0089]

[0090] Where, RI, RI B The radio interference test results at positions A and B are RI 背 is the background interference value.

[0091] The radio interference values at any two locations can be used to obtain a background interference value using formula (2). When there are many radio interference measurement antennas, there will be multiple background values. When the environmental interference at different locations does not change much, the average background value of a certain area can also be obtained by arithmetic averaging.

[0092] Subtract the background interference value from the current radio interference measurement value to obtain the actual radio interference level of the transmission line and store it. The specific processing method is:

[0093]

[0094] Where, the measured value is RI 测 , the background value is RI 背 , the actual radio interference value is RI 实 .

[0095] The effects of the present invention will be described below with reference to the accompanying drawings, taking the radio interference measurement results of the high-altitude DC test line section of the State Grid Corporation of China in Yangbajing, Tibet as an example.

[0096] The conductor type of the high altitude DC test line segment is 4×500mm 2 The height of the conductor to the ground is 15m. The projection of the positive conductor to the ground is taken as the origin. Two radio interference measurement antennas are arranged at 0m and +20m respectively. Figure 3 The height of the radio interference measurement antenna is 1.5m, and the antenna plane is parallel to the conductor.

[0097] First, a higher voltage is applied to the positive polarity wire, making its radio interference clearly identifiable and at least 10dB greater than the background interference. By measuring radio interference at different locations and combining theoretical calculations, the radio interference distance attenuation coefficient k is calculated to be 33.

[0098] ±500kV voltage is applied to the DC test line segment bipolarly, and the radio interference measurement antennas at two positions below the line are used to perform radio interference measurements synchronously. Figure 4 The original test data of radio interference under the positive conductor is attached. Figure 5The figure shows the radio interference spectrum after background filtering of the original data using the method of the present invention. As can be seen from the figure, the real-time radio interference background filtering method proposed in this invention can effectively filter out background influences. Compared with the original test data, the radio interference waveform after background filtering exhibits distinct peaks and troughs, demonstrating a significant effect in filtering out background interference.

[0099] Optionally, the radio interference attenuation amount is determined based on the origin and the measurement point according to the attenuation characteristics of the radio interference during spatial propagation, including:

[0100] The radio interference attenuation is determined based on the origin and the measurement point according to the following formula:

[0101] Δ AB =k(lgD A -lgD B )

[0102] Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and D A D is the direct distance from the conductor to the measuring point A. B is the direct distance from the conductor to measuring point B, and k is the distance attenuation coefficient.

[0103] Optionally, during the test, each set of radio interference measurement results is preprocessed to determine whether the test data is valid. If valid, the set of data is retained to obtain a valid test result after preprocessing; if invalid, the set of data is deleted, including:

[0104] The determination of valid test data meets the following conditions:

[0105] 1) The radio interference test value at the bottom of the positive line, that is, the origin, is the largest. As the distance from the positive line increases, the radio interference test result gradually decreases;

[0106] 2) The radio interference results of two adjacent measurement points satisfy the following relationship:

[0107]

[0108] Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and RI A is the radio interference measurement result at location 1, RI B is the radio interference measurement result at position B, D1 and D2 are the direct distances of position A and position B from the positive conductor respectively.

[0109] Optionally, performing real-time analysis on the pre-processed valid test results to determine the background radio interference level, i.e., the background interference value, based on the radio interference attenuation, includes:

[0110] Substitute the effective test results of measurement point A and measurement point B into the following formula to determine the background radio interference level RI 背 :

[0111]

[0112] Where, RI, RI B The radio interference test results at positions A and B are RI 背 is the background radio interference level, that is, the background interference value.

[0113] Optionally, subtracting a background interference value from a current radio interference measurement value to obtain an actual corona radio interference level of the transmission line and storing the obtained value, including:

[0114] The actual corona radio interference level of the transmission line is calculated according to the following formula:

[0115]

[0116] In the formula, RI 测 is the measured value, RI 背 is the background value, RI 实 is the actual radio interference value.

[0117] By applying radio interference propagation theory to DC transmission lines and combining it with experimental verification, a method has been proposed for simultaneously and in real time filtering out background interference from DC line corona radio interference during testing. This method effectively ensures the authenticity and validity of data during corona radio interference measurements. This method addresses the current inability of common methods to filter out background interference in real time during transmission line radio interference measurements. This method is particularly applicable when environmental background interference is persistent and stable. In practical use, this method is more accurate and simpler than other methods.

[0118] According to another aspect of the present invention, a high altitude DC transmission line radio interference noise reduction system 600 is provided. Figure 6 As shown, the system 600 includes:

[0119] Arrange measurement antenna module 610, for arranging a specified number of radio interference measurement antennas on the ground below the DC line, with the projection of the positive line conductor on the ground as the origin, perpendicular to the line path and outward of the positive line;

[0120] An interference attenuation determination module 620 is configured to determine the radio interference attenuation based on the origin and the measurement point according to the attenuation characteristics of the radio interference during spatial propagation.

[0121] Obtaining interference measurement result module 630, configured to synchronize the start and end times of radio interference measurement at different locations when the DC transmission line is energized, measure the radio interference measurement antenna, and obtain radio interference measurement results;

[0122] The test result determination module 640 is used to pre-process each set of radio interference measurement results during the test, determine whether the test data is valid, and if so, retain the set of data to obtain a valid test result after pre-processing; if not, delete the set of data;

[0123] A background interference determination module 650 is configured to perform real-time analysis on the pre-processed valid test results and determine a background radio interference level, i.e., a background interference value, based on the radio interference attenuation;

[0124] The actual interference obtaining module 660 is configured to subtract the background interference value from the current radio interference measurement value to obtain the actual corona radio interference level of the transmission line and store the obtained value.

[0125] Optionally, the interference attenuation determination module includes:

[0126] The interference attenuation quantum determination module is used to determine the radio interference attenuation based on the origin and the measurement point according to the following formula:

[0127] Δ AB =k(lgD A -lgD B )

[0128] Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and D A D is the direct distance from the conductor to the measuring point A. B is the direct distance from the conductor to measuring point B, and k is the distance attenuation coefficient.

[0129] Optionally, the test result determination module 640 includes:

[0130] The test result determination condition submodule is used to determine whether the test valid data meets the following conditions:

[0131] 1) The radio interference test value at the bottom of the positive line, that is, the origin, is the largest. As the distance from the positive line increases, the radio interference test result gradually decreases;

[0132] 2) The radio interference results of two adjacent measurement points satisfy the following relationship:

[0133]

[0134] Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and RI A is the radio interference measurement result at location 1, RI B is the radio interference measurement result at position B, D1 and D2 are the direct distances of position A and position B from the positive conductor respectively.

[0135] Optionally, the background interference determination module 650 includes:

[0136] The background interference determination submodule is used to substitute the effective test results of measurement point A and the effective test results of measurement point B into the following formula to determine the background radio interference level RI 背 :

[0137]

[0138] Where, RI, RI B The radio interference test results at positions A and B are RI 背 is the background radio interference level, that is, the background interference value.

[0139] Optionally, the actual interference obtaining module 660 includes:

[0140] The actual interference value submodule calculates the actual corona radio interference level of the transmission line according to the following formula:

[0141]

[0142] In the formula, RI 测 is the measured value, RI 背 is the background value, RI 实 is the actual radio interference value.

[0143] A high-altitude DC transmission line radio interference noise reduction system 600 according to an embodiment of the present invention corresponds to a high-altitude DC transmission line radio interference noise reduction method 100 according to another embodiment of the present invention, and will not be described in detail herein.

[0144] It will be understood by those skilled in the art that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention may be implemented in various computer languages, for example, the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0145] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0146] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0147] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0148] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0149] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for reducing radio interference noise in high-altitude DC transmission lines, characterized in that: include: On the ground below the DC line, with the projection of the positive line conductor to the ground as the origin, a specified number of radio interference measurement antennas are arranged perpendicular to the line path toward the outside of the positive pole; Determine the radio interference attenuation based on the origin and measurement point through the attenuation characteristics of radio interference during spatial propagation; When the DC transmission line is energized, the start and end times of radio interference measurements at different locations are kept synchronized, the radio interference measurement antenna is measured, and the radio interference measurement results are obtained; During the test, each set of radio interference measurement results is pre-processed to determine whether the test data is valid. If valid, the set of data is retained to obtain a valid test result after pre-processing. If invalid, the set of data is deleted. Perform real-time analysis on the valid test results after preprocessing and determine the background radio interference level, i.e., the background interference value, based on the radio interference attenuation; The background interference value is subtracted from the current radio interference measurement value to obtain the actual corona radio interference level of the transmission line and store it.

2. The method according to claim 1, characterized in that Based on the attenuation characteristics of radio interference during spatial propagation, the radio interference attenuation is determined based on the origin and measurement points, including: The radio interference attenuation is determined based on the origin and the measurement point according to the following formula: Δ AB =k(lgD A -lgD B ) Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and D A D is the direct distance from the conductor to the measuring point A. B is the direct distance from the conductor to measuring point B, and k is the distance attenuation coefficient.

3. The method according to claim 1, characterized in that During the test, each set of radio interference measurement results is pre-processed to determine whether the test data is valid. If valid, the set of data is retained to obtain a valid test result after pre-processing. If invalid, the set of data is deleted, including: The determination of valid test data meets the following conditions: 1) The radio interference test value at the bottom of the positive line, that is, the origin, is the largest. As the distance from the positive line increases, the radio interference test result gradually decreases; 2) The radio interference results of two adjacent measurement points satisfy the following relationship: Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and RI A is the radio interference measurement result at location 1, RI B is the radio interference measurement result at position B, D1 and D2 are the direct distances of position A and position B from the positive conductor respectively.

4. The method according to claim 2, characterized in that Perform real-time analysis on the valid test results after preprocessing and determine the background radio interference level, i.e., the background interference value, based on the radio interference attenuation, including: Substitute the effective test results of measurement point A and measurement point B into the following formula to determine the background radio interference level RI 背 : Where, RI, RI B The radio interference test results at positions A and B are RI 背 is the background radio interference level, that is, the background interference value.

5. The method according to claim 1, characterized in that Subtract the background interference value from the current radio interference measurement value to obtain the actual corona radio interference level of the transmission line and store it, including: The actual corona radio interference level of the transmission line is calculated according to the following formula: In the formula, RI 测 is the measured value, RI 背 is the background value, RI 实 is the actual radio interference value.

6. A high-altitude DC transmission line radio interference noise reduction system, characterized in that: include: Arrange the measurement antenna module to arrange a specified number of radio interference measurement antennas on the ground below the DC line, with the projection of the positive line conductor on the ground as the origin, perpendicular to the line path and toward the outside of the positive pole; An interference attenuation determination module is used to determine the radio interference attenuation based on the origin and the measurement point according to the attenuation characteristics of the radio interference during the spatial propagation process; Obtaining interference measurement result module, used for synchronizing the start and end time of radio interference measurement at different locations when the DC transmission line is energized, measuring the radio interference measurement antenna, and obtaining radio interference measurement results; The test result judgment module is used to pre-process each set of radio interference measurement results in the test, judge whether the test data is valid, if valid, retain the set of data and obtain the valid test results after pre-processing; if invalid, delete the set of data; A background interference determination module is used to perform real-time analysis on the valid test results after preprocessing and determine the background radio interference level, i.e., the background interference value, based on the radio interference attenuation; The actual interference obtaining module is used to subtract the background interference value from the current radio interference measurement value to obtain the actual corona radio interference level of the transmission line and store it.

7. The system according to claim 6, characterized in that The interference attenuation determination module includes: The interference attenuation quantum determination module is used to determine the radio interference attenuation based on the origin and the measurement point according to the following formula: Δ AB =k(lgD A -lgD B ) Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and D A D is the direct distance from the conductor to the measuring point A. B is the direct distance from the conductor to measuring point B, and k is the distance attenuation coefficient.

8. The system according to claim 6, wherein: The test result judgment module includes: The test result determination condition submodule is used to determine whether the test valid data meets the following conditions: 1) The radio interference test value at the bottom of the positive line, that is, the origin, is the largest. As the distance from the positive line increases, the radio interference test result gradually decreases; 2) The radio interference results of two adjacent measurement points satisfy the following relationship: Where A is the measuring point numbered closer to the positive conductor, B is the measuring point numbered farther from the positive conductor, and RI A is the radio interference measurement result at location 1, RI B is the radio interference measurement result at position B, D1 and D2 are the direct distances of position A and position B from the positive conductor respectively.

9. The system according to claim 7, wherein: Determine background interference module, including: The background interference determination submodule is used to substitute the effective test results of measurement point A and the effective test results of measurement point B into the following formula to determine the background radio interference level RI 背 : Where, RI, RI B The radio interference test results at positions A and B are RI 背 is the background radio interference level, that is, the background interference value.

10. The system according to claim 6, wherein: Get the actual interference module, including: The actual interference value submodule calculates the actual corona radio interference level of the transmission line according to the following formula: In the formula, RI 测 is the measured value, RI 背 is the background value, RI 实 is the actual radio interference value.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

12. An electronic device, characterized in that: include: The computer-readable storage medium of claim 11; as well as One or more processors are configured to execute the program in the computer-readable storage medium.

Images