Method and system for acquiring audible noise data of alternating-current high-voltage transmission line

Abstract

The invention discloses a method and a system for acquiring audible noise data of an alternating-current high-voltage transmission line, and the method comprises the steps: measuring the audible noise data of the alternating-current transmission line in a rainy season, and obtaining the audible noise measurement data under a continuous rainfall condition; wherein the audible noise measurement data comprises an audible noise measurement value, rainfall duration data, rainfall data and wind speed data which have an association relationship; screening the audible noise measurement data based on the rainfall duration, the rainfall capacity and the wind speed to obtain target audible noise measurement data; and determining a rainy day audible noise median of the AC power transmission line based on an audible noise measurement value in the target audible noise measurement data. The method greatly saves the cost, improves the efficiency, reduces the dangerousness of obtaining the audible noise statistical value in the plateau complex climate environment, can be applied to the obtaining of the actual level of the audible noise of the power transmission line in the field of alternating-current power transmission and transformation projects in the future and the acceptance and evaluation of project environmental protection, and is high in popularization value and wide in application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic environment of electric power system, and more particularly to a method and system for acquiring audible noise data of AC high voltage transmission line. Background Art

[0002] At present, my country's power grid is developing rapidly, and ultra-high voltage AC and DC power transmission and transformation projects are being widely constructed. Power transmission and transformation projects are getting closer and closer to residential areas. As people's environmental awareness continues to increase, people are paying more and more attention to the impact of the electromagnetic environment on power transmission and transformation projects. With the continuous increase in the voltage level of power transmission and transformation, the surface field strength of the line conductor increases, and the audible noise generated by the conductor corona increases. Since audible noise can be directly perceived by surrounding residents, it has become the most important issue of the electromagnetic environment that the public is concerned about. Audible noise is now one of the decisive factors in the selection and arrangement of ultra-high voltage AC transmission line conductors. When designing my country's ultra-high and extra-high voltage AC transmission lines, the audible noise is controlled to be no more than 55dB(A) under wet conductor conditions (L50 value on rainy days, i.e., median) at a distance of 20m from the projection of the side phase conductor of the transmission line. Therefore, accurately measuring and obtaining the median value of AC transmission lines on rainy days is of great engineering significance and research value for evaluating the audible noise level of the lines and protecting the environment, and further optimizing the subsequent transmission line design. The existing method for obtaining the median value of audible noise on rainy days requires long-term observation for 1-2 years, and statistical analysis of all rainy day measurement values. This method not only takes a long time and is costly, but also is difficult to implement in high-altitude and complex climate environments such as the Qinghai-Tibet Plateau, and the risks to long-term operation and maintenance personnel are very high. In some areas, long-term observations lasting one year are almost impossible to implement due to the lack of basic conditions such as continuous power supply. There is an urgent need to propose a method to quickly obtain the median value of audible noise on rainy days for AC transmission lines.

[0003] The existing method for obtaining the median value of audible noise of transmission lines on rainy days requires long-term observation lasting 1-2 years, and statistical analysis of all rainy day measurement values. Not only is it long-term and costly, but continuous observation is more difficult to implement in high-altitude and complex climate environments such as the Qinghai-Tibet Plateau, and the risk of personnel maintenance is very high. In some areas, long-term observations lasting one year are almost impossible to implement due to the lack of basic conditions such as continuous power supply.

[0004] Therefore, a method is needed to quickly obtain the median value of audible noise of AC high-voltage transmission lines on rainy days. Summary of the invention

[0005] The present invention provides a method and system for obtaining audible noise data of an AC high-voltage transmission line, so as to solve the problem of how to quickly obtain the approximate annual median of rainy days of audible noise of an AC high-voltage transmission line.

[0006] In order to solve the above problem, according to one aspect of the present invention, a method for obtaining audible noise data of an AC high-voltage transmission line is provided, the method comprising:

[0007] In the rainy season, the audible noise data of the AC transmission line is measured to obtain the audible noise measurement data under the condition of continuous rainfall; wherein the audible noise measurement data includes: audible noise measurement value, rainfall duration data, rainfall data and wind speed data with associated relationship;

[0008] Screen the audible noise measurement data based on rainfall duration, rainfall amount and wind speed to obtain target audible noise measurement data;

[0009] The median audible noise of the AC power transmission line on rainy days is determined based on the audible noise measurement values ​​in the target audible noise measurement data.

[0010] Preferably, the method further comprises:

[0011] Using audible noise measurement equipment, the audible noise of the transmission line is measured under continuous rainfall conditions;

[0012] Use the weather station to measure wind speed and rainfall data;

[0013] The rainfall per minute is measured using a rain gauge to determine whether it is raining.

[0014] Preferably, the audible noise measuring device comprises: a measuring host and two outdoor microphones; wherein the two outdoor microphones are respectively used to synchronously measure a line evaluation point and a background noise point at the center of the line span, wherein the line evaluation point is located at a first preset distance outside the projection of the side phase conductor of the measuring transmission line, and the background noise point is located at least a second preset distance outside the projection of the side phase conductor of the transmission line;

[0015] The weather station comprises: an anemometer and a tipping bucket rain gauge; wherein the anemometer is used to measure wind speed data; the tipping bucket rain gauge is used to measure rainfall data;

[0016] The rain gauge includes an optical rain gauge or an ultrasonic rain gauge.

[0017] Preferably, the screening of audible noise measurement data based on rainfall duration, rainfall amount and wind speed to obtain target audible noise measurement data includes:

[0018] Audible noise measurement data is screened out under the conditions that rainfall starts after a first preset time length and lasts longer than or equal to a second preset time length, the rainfall is within a preset rainfall range, and the wind speed is less than a preset wind speed threshold, to obtain target audible noise measurement data.

[0019] Preferably, the method further comprises:

[0020] When the noise sound pressure level at the background noise point is greater than or equal to the preset sound pressure level threshold, the audible noise measurement value at the line evaluation point is corrected, including:

[0021]

[0022] Among them, L p1 is the audible noise correction value at the line evaluation point after correction; L p L is the audible noise value at the line evaluation point obtained by measurement; p2 is the noise sound pressure level at the background noise point.

[0023] According to another aspect of the present invention, a system for acquiring audible noise data of an AC high-voltage transmission line is provided, the system comprising:

[0024] A noise data measurement unit is used to measure the audible noise data of the AC transmission line in the rainy season to obtain the audible noise measurement data under continuous rainfall conditions; wherein the audible noise measurement data includes: an audible noise measurement value, rainfall duration data, rainfall amount data and wind speed data with associated relationships;

[0025] A data screening unit, used to screen the audible noise measurement data based on rainfall duration, rainfall amount and wind speed, and obtain target audible noise measurement data;

[0026] The noise median determination unit is used to determine the median of the audible noise of the AC transmission line on rainy days based on the audible noise measurement values ​​in the target audible noise measurement data.

[0027] Preferably, the system further comprises:

[0028] Audible noise measurement equipment for measuring audible noise of transmission lines under continuous rainfall conditions;

[0029] Weather station, used to measure wind speed and rainfall data;

[0030] A rain gauge is used to measure the amount of rainfall per minute to determine whether it is raining.

[0031] Preferably, the audible noise measuring device comprises: a measuring host and two outdoor microphones; wherein the two outdoor microphones are respectively used to synchronously measure a line evaluation point and a background noise point at the center of the line span, wherein the line evaluation point is located at a first preset distance outside the projection of the side phase conductor of the measuring transmission line, and the background noise point is located at least a second preset distance outside the projection of the side phase conductor of the transmission line;

[0032] The weather station comprises: an anemometer and a tipping bucket rain gauge; wherein the anemometer is used to measure wind speed data; the tipping bucket rain gauge is used to measure rainfall data;

[0033] The rain gauge includes an optical rain gauge or an ultrasonic rain gauge.

[0034] Preferably, the data screening unit screens the audible noise measurement data based on rainfall duration, rainfall amount and wind speed to obtain target audible noise measurement data, including:

[0035] Audible noise measurement data is screened out under the conditions that rainfall starts after a first preset time length and lasts longer than or equal to a second preset time length, the rainfall is within a preset rainfall range, and the wind speed is less than a preset wind speed threshold, to obtain target audible noise measurement data.

[0036] Preferably, the system further comprises:

[0037] The data correction unit is used to correct the audible noise measurement value at the line evaluation point when the noise sound pressure level at the background noise point is greater than or equal to a preset sound pressure level threshold, including:

[0038]

[0039] Among them, L p1 is the audible noise correction value at the line evaluation point after correction; L p L is the audible noise value at the line evaluation point obtained by measurement; p2 is the noise sound pressure level at the background noise point.

[0040] The present invention provides a method and system for obtaining audible noise data of an AC high-voltage transmission line, comprising: measuring the audible noise data of the AC transmission line in the rainy season to obtain audible noise measurement data under continuous rainfall conditions; wherein the audible noise measurement data comprises: audible noise measurement values, rainfall duration data, rainfall data and wind speed data having an associated relationship; screening the audible noise measurement data based on rainfall duration, rainfall amount and wind speed to obtain target audible noise measurement data; and determining the median audible noise of the AC transmission line on rainy days based on the audible noise measurement values ​​in the target audible noise measurement data. The present invention conducts a short-term test on the audible noise of the transmission line in the rainy season, obtains the measured value of the audible noise under continuous rainfall, screens out the audible noise data under suitable continuous rainfall conditions for statistics, thereby obtaining the median of the audible noise of the AC transmission line on rainy days that is close to the long-term observation of more than one year, which is used for the evaluation of the audible noise level of the transmission line on rainy days. This will greatly save costs and improve efficiency, reduce the danger of obtaining audible noise statistics under complex climate environments in the plateau, and can be applied to the acquisition of the actual level of audible noise of transmission lines in the field of future AC transmission and transformation projects, project environmental protection acceptance and evaluation, and subsequent optimization design of similar transmission lines. It has high promotion value and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0042] Figure 1 A flowchart of a method 100 for acquiring audible noise data of an AC high voltage transmission line according to an embodiment of the present invention;

[0043] Figure 2 is a schematic diagram of a measurement position according to an embodiment of the present invention;

[0044] Figure 3 A schematic diagram of a short-term rapid test on a rainy day and a 2-year long-term observation statistical result according to an embodiment of the present invention;

[0045] Figure 4 4 is a schematic diagram of the structure of a system 400 for acquiring audible noise data of an AC high-voltage transmission line according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0047] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the 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.

[0048] Figure 1 FIG. 1 is a flow chart of a method 100 for acquiring audible noise data of an AC high voltage transmission line according to an embodiment of the present invention. Figure 1 As shown, the method for obtaining audible noise data of AC high-voltage transmission lines provided by the embodiment of the present invention is to conduct a short-term test on the audible noise of the transmission line in the rainy season, obtain the audible noise measurement value under continuous rainfall, and select the audible noise data under suitable continuous rainfall conditions for statistics, so as to obtain the median of the audible noise of the AC transmission line on rainy days that is similar to the long-term observation of more than one year, which is used for the evaluation of the audible noise level of the transmission line on rainy days, which will greatly save costs and improve efficiency, reduce the danger of obtaining audible noise statistics under complex climate environments on the plateau, and can be applied to the acquisition of the actual level of audible noise of the transmission line in the field of AC transmission and transformation engineering in the future and the environmental protection acceptance and evaluation of the project, as well as the subsequent optimization design of similar transmission lines, with high promotion value and broad application prospects. The method 100 for obtaining audible noise data of AC high-voltage transmission lines provided by the embodiment of the present invention starts from step 101. In step 101, the audible noise data of the AC transmission line is measured in the rainy season to obtain the audible noise measurement data under continuous rainfall conditions. The audible noise measurement data includes: audible noise measurement values, rainfall duration data, rainfall amount data and wind speed data having an associated relationship.

[0049] Preferably, the method further comprises:

[0050] Using audible noise measurement equipment, the audible noise of the transmission line is measured under continuous rainfall conditions;

[0051] Use the weather station to measure wind speed and rainfall data;

[0052] The rainfall per minute is measured using a rain gauge to determine whether it is raining.

[0053] Preferably, the audible noise measuring device comprises: a measuring host and two outdoor microphones; wherein the two outdoor microphones are respectively used to synchronously measure a line evaluation point and a background noise point at the center of the line span, wherein the line evaluation point is located at a first preset distance outside the projection of the side phase conductor of the measuring transmission line, and the background noise point is located at least a second preset distance outside the projection of the side phase conductor of the transmission line;

[0054] The weather station comprises: an anemometer and a tipping bucket rain gauge; wherein the anemometer is used to measure wind speed data; the tipping bucket rain gauge is used to measure rainfall data;

[0055] The rain gauge includes an optical rain gauge or an ultrasonic rain gauge.

[0056] Combined diagram Figure 2 As shown, in the present invention, a measurement system composed of all-weather audible noise measurement equipment, a small meteorological station, a rain gauge, etc. is used to measure the audible noise data of the AC transmission line in the rainy season to obtain the audible noise measurement data under continuous rainfall conditions.

[0057] The audible noise measurement equipment includes at least two outdoor microphones and a measurement host, which are used to accurately measure the audible noise of the transmission line under continuous rainfall conditions. The two outdoor microphones for audible noise measurement are used to synchronously measure the audible noise at the line evaluation point and the background noise point in the center of the line span. The line evaluation point is located 20m outside the projection of the side phase conductor of the transmission line, and the line background noise point is located more than 70m outside the projection of the side phase conductor of the transmission line.

[0058] Among them, the small meteorological station includes: anemometer and tipping bucket rain gauge, which measure the wind speed per minute and accurately measure the rainfall respectively.

[0059] The rain gauge may be composed of instantaneous rainfall measuring devices such as an optical rain gauge or an ultrasonic rain gauge, which can measure the rainfall per minute in real time and is mainly used to determine whether it is a rainfall state, and the requirements for its numerical accuracy are not high.

[0060] In step 102, audible noise measurement data is screened based on rainfall duration, rainfall amount, and wind speed to obtain target audible noise measurement data.

[0061] Preferably, the screening of audible noise measurement data based on rainfall duration, rainfall amount and wind speed to obtain target audible noise measurement data includes:

[0062] Audible noise measurement data is screened out under the conditions that rainfall starts after a first preset time length and lasts longer than or equal to a second preset time length, the rainfall is within a preset rainfall range, and the wind speed is less than a preset wind speed threshold, to obtain target audible noise measurement data.

[0063] In the present invention, the short-term test of the audible noise of the transmission line by the measurement system in the rainy season should last for more than 1 day and less than 1 month. The audible noise measurement value under continuous rainfall should last for no less than 3 hours. When screening, the first preset length is 1 hour, the second preset length is 2 hours, the preset rainfall range is 1-2 mm / h, and the preset wind speed threshold is 3 m / s.

[0064] In step 103, a median of the audible noise of the AC power transmission line on rainy days is determined based on the audible noise measurement values ​​in the target audible noise measurement data.

[0065] Preferably, the method further comprises:

[0066] When the noise sound pressure level at the background noise point is greater than or equal to the preset sound pressure level threshold, the audible noise measurement value at the line evaluation point is corrected, including:

[0067]

[0068] Among them, L p1 is the audible noise correction value at the line evaluation point after correction; L p L is the audible noise value at the line evaluation point obtained by measurement; p2 is the noise sound pressure level at the background noise point.

[0069] In the present invention, when the background noise is large on rainy days, it is necessary to correct the noise at the line evaluation point, that is, the noise sound pressure level at the line evaluation point measured is set as L p , background noise sound pressure level L p2 , then the sound pressure level L at the evaluation point considering the background correction p1 , it can be calculated by the following formula:

[0070]

[0071] In the present invention, the screened data is corrected, and then based on the corrected audible noise data, a median of the audible noise of the AC transmission line on rainy days that is approximately equal to or greater than one year of long-term observation is determined.

[0072] In the present invention, the process of quickly obtaining the approximate annual median of rainy days of audible noise of AC high-voltage transmission lines includes:

[0073] Step 1: Pre-select the measurement point location of the line to be tested, and place an all-weather audible noise measurement device at the line measurement point during the rainy season. Use at least two outdoor microphones, which are placed at the line evaluation point and more than 70m outside the edge phase to measure the background noise.

[0074] Step 2: Place a small weather station and a rain gauge near the audible noise measurement equipment. The distance between them should be appropriate so that the weather station and rain gauge do not generate much additional noise during operation.

[0075] Step 3: Turn on the all-weather audible noise measurement equipment, small weather station, and rain gauge, and each device will synchronously measure meteorological parameters such as audible noise, wind speed, and rainfall.

[0076] Step 4: Observe and save the measurement data.

[0077] Step 5: Filter out the audible noise measurement data with continuous rainfall time of not less than 2 hours and wind speed less than 3m / s, and calculate the average rainfall.

[0078] Step 5: If the average rainfall is 1-2 mm / h during continuous rainfall, the audible noise value of the evaluation point after removing the influence of background noise is calculated. If the rainfall exceeds the range, continue to screen other continuous periods until the rainfall meets the requirements.

[0079] Step 6: Arrange the audible noise (after background noise processing) at the evaluation point under continuous rainfall from large to small to obtain the median number of rainy days under continuous rainfall.

[0080] To verify the effectiveness of the method of the present invention, a comparison was made between the short-term rapid test on rainy days at the 750kV Guanting Observation Station at an altitude of 1854m and the statistical results of two years of long-term observation. Figure 3 As shown. Figure 3 It can be seen that the statistical results of two annual rainy days with sample sizes of 9446 and 7374 under continuous testing for more than 700 days in two years are basically consistent with the statistical value of 330 samples under 5.5 hours of continuous rainfall, which proves that the method of the present invention is accurate and effective.

[0081] Figure 4 FIG. 4 is a schematic diagram of a system 400 for acquiring audible noise data of an AC high voltage transmission line according to an embodiment of the present invention. Figure 4 As shown, a system 400 for acquiring audible noise data of an AC high-voltage transmission line provided in an embodiment of the present invention includes: a noise data measuring unit 401 , a data screening unit 402 and a noise median determining unit 403 .

[0082] Preferably, the noise data measurement unit 401 is used to measure the audible noise data of the AC transmission line in the rainy season to obtain audible noise measurement data under continuous rainfall conditions; wherein the audible noise measurement data includes: audible noise measurement values, rainfall duration data, rainfall data and wind speed data with associated relationships.

[0083] Preferably, the system further comprises:

[0084] Audible noise measurement equipment for measuring audible noise of transmission lines under continuous rainfall conditions;

[0085] Weather station, used to measure wind speed and rainfall data;

[0086] A rain gauge is used to measure the amount of rainfall per minute to determine whether it is raining.

[0087] Preferably, the audible noise measuring device comprises: a measuring host and two outdoor microphones; wherein the two outdoor microphones are respectively used to synchronously measure a line evaluation point and a background noise point at the center of the line span, wherein the line evaluation point is located at a first preset distance outside the projection of the side phase conductor of the measuring transmission line, and the background noise point is located at least a second preset distance outside the projection of the side phase conductor of the transmission line;

[0088] The weather station comprises: an anemometer and a tipping bucket rain gauge; wherein the anemometer is used to measure wind speed data; the tipping bucket rain gauge is used to measure rainfall data;

[0089] The rain gauge includes an optical rain gauge or an ultrasonic rain gauge.

[0090] Preferably, the data screening unit 402 is used to screen the audible noise measurement data based on rainfall duration, rainfall amount and wind speed to obtain target audible noise measurement data.

[0091] Preferably, the data screening unit 402 screens the audible noise measurement data based on the rainfall duration, rainfall amount and wind speed to obtain the target audible noise measurement data, including:

[0092] Audible noise measurement data is screened out under the conditions that rainfall starts after a first preset time length and lasts longer than or equal to a second preset time length, the rainfall is within a preset rainfall range, and the wind speed is less than a preset wind speed threshold, to obtain target audible noise measurement data.

[0093] Preferably, the noise median determining unit 403 is used to determine the rainy day audible noise median of the AC transmission line based on the audible noise measurement values ​​in the target audible noise measurement data.

[0094] Preferably, the system further comprises:

[0095] The data correction unit is used to correct the audible noise measurement value at the line evaluation point when the noise sound pressure level at the background noise point is greater than or equal to a preset sound pressure level threshold, including:

[0096]

[0097] Among them, L p1 is the audible noise correction value at the line evaluation point after correction; L p L is the audible noise value at the line evaluation point obtained by measurement; p2 is the noise sound pressure level at the background noise point.

[0098] The system 400 for acquiring audible noise data of an AC high-voltage transmission line in an embodiment of the present invention corresponds to the method 100 for acquiring audible noise data of an AC high-voltage transmission line in another embodiment of the present invention, and will not be described in detail herein.

[0099] The invention has been described above with reference to a few embodiments. However, it is readily apparent to a person skilled in the art that other embodiments than the ones disclosed above are equally within the scope of the invention, as defined by the appended patent claims.

[0100] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a / said / the [means, components, etc.]" are to be openly interpreted as at least one instance of said means, components, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not necessarily have to be performed in the exact order disclosed, unless explicitly stated otherwise.

[0101] Those skilled in the art will appreciate that 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. Moreover, 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.

[0102] 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 flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, 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 flowchart and / or block diagram. 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.

[0103] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0104] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions 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.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for obtaining audible noise data of an AC high voltage transmission line, characterized in that: The method comprises: In the rainy season, the audible noise data of the AC transmission line is measured to obtain the audible noise measurement data under the condition of continuous rainfall; wherein the audible noise measurement data includes: audible noise measurement value, rainfall duration data, rainfall data and wind speed data with associated relationship; Screen the audible noise measurement data based on rainfall duration, rainfall amount and wind speed to obtain target audible noise measurement data; The median audible noise of the AC power transmission line on rainy days is determined based on the audible noise measurement values ​​in the target audible noise measurement data.

2. The method according to claim 1, characterized in that: The method further comprises: Using audible noise measurement equipment, the audible noise of the transmission line is measured under continuous rainfall conditions; Use the weather station to measure wind speed and rainfall data; The rainfall per minute is measured using a rain gauge to determine whether it is raining.

3. The method according to claim 2, characterized in that The audible noise measuring device comprises: a measuring host and two outdoor microphones; wherein the two outdoor microphones are respectively used to synchronously measure a line evaluation point and a background noise point at the center of a line span, wherein the line evaluation point is located at a first preset distance outside the projection of a side phase conductor of the measuring transmission line, and the background noise point is located at least a second preset distance outside the projection of the side phase conductor of the transmission line; The weather station comprises: an anemometer and a tipping bucket rain gauge; wherein the anemometer is used to measure wind speed data; the tipping bucket rain gauge is used to measure rainfall data; The rain gauge includes an optical rain gauge or an ultrasonic rain gauge.

4. The method according to claim 3, characterized in that: The screening of audible noise measurement data based on rainfall duration, rainfall amount and wind speed to obtain target audible noise measurement data includes: Audible noise measurement data is screened out under the conditions that rainfall starts after a first preset time length and lasts longer than or equal to a second preset time length, the rainfall is within a preset rainfall range, and the wind speed is less than a preset wind speed threshold, to obtain target audible noise measurement data.

5. The method according to claim 1, characterized in that The method further comprises: When the noise sound pressure level at the background noise point is greater than or equal to the preset sound pressure level threshold, the audible noise measurement value at the line evaluation point is corrected, including: Among them, L p1 is the corrected audible noise correction value at the line evaluation point; L p L is the audible noise value at the line evaluation point obtained by measurement; p2 is the noise sound pressure level at the background noise point.

6. A system for acquiring audible noise data of AC high voltage transmission lines, characterized in that: The system comprises: A noise data measurement unit is used to measure the audible noise data of the AC transmission line in the rainy season to obtain the audible noise measurement data under continuous rainfall conditions; wherein the audible noise measurement data includes: an audible noise measurement value, rainfall duration data, rainfall amount data and wind speed data with associated relationships; A data screening unit, used to screen the audible noise measurement data based on rainfall duration, rainfall amount and wind speed, and obtain target audible noise measurement data; The noise median determination unit is used to determine the median of the audible noise of the AC transmission line on rainy days based on the audible noise measurement values ​​in the target audible noise measurement data.

7. The system according to claim 6, characterized in that The system further comprises: Audible noise measurement equipment for measuring audible noise of transmission lines under continuous rainfall conditions; Weather station, used to measure wind speed and rainfall data; A rain gauge is used to measure the amount of rainfall per minute to determine whether it is raining.

8. The system according to claim 7, characterized in that The audible noise measuring device comprises: a measuring host and two outdoor microphones; wherein the two outdoor microphones are respectively used to synchronously measure a line evaluation point and a background noise point at the center of a line span, wherein the line evaluation point is located at a first preset distance outside the projection of a side phase conductor of the measuring transmission line, and the background noise point is located at least a second preset distance outside the projection of the side phase conductor of the transmission line; The weather station comprises: an anemometer and a tipping bucket rain gauge; wherein the anemometer is used to measure wind speed data; the tipping bucket rain gauge is used to measure rainfall data; The rain gauge includes an optical rain gauge or an ultrasonic rain gauge.

9. The system according to claim 8, characterized in that The data screening unit screens the audible noise measurement data based on the rainfall duration, rainfall amount and wind speed to obtain the target audible noise measurement data, including: Audible noise measurement data is screened out under the conditions that rainfall starts after a first preset time length and lasts longer than or equal to a second preset time length, the rainfall is within a preset rainfall range, and the wind speed is less than a preset wind speed threshold, to obtain target audible noise measurement data.

10. The system according to claim 6, characterized in that The system further comprises: The data correction unit is used to correct the audible noise measurement value at the line evaluation point when the noise sound pressure level at the background noise point is greater than or equal to a preset sound pressure level threshold, including: Among them, L p1 is the corrected audible noise correction value at the line evaluation point; L p L is the audible noise value at the line evaluation point obtained by measurement; p2 is the noise sound pressure level at the background noise point.

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