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Method for processing corona audible noise of high-voltage direct-current power transmission line under high background noise

A transmission line, high-voltage DC technology, applied in the measurement of ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., can solve the problems of taking a lot of time and the scale of the data to be removed is not easy to unify, so as to ensure the authenticity and avoid the rejection standard. Inconsistent, labor-saving effect

Active Publication Date: 2015-05-20
STATE GRID CORP OF CHINA +2
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  • Application Information

AI Technical Summary

Problems solved by technology

For example, the invalid data in a large amount of measurement data only needs to be manually eliminated, which takes a lot of time, and the scale of the eliminated data is not easy to unify, so an effective invalid data determination method is urgently needed

Method used

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  • Method for processing corona audible noise of high-voltage direct-current power transmission line under high background noise
  • Method for processing corona audible noise of high-voltage direct-current power transmission line under high background noise
  • Method for processing corona audible noise of high-voltage direct-current power transmission line under high background noise

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Embodiment 1

[0037] Such as Figure 1-8 Shown, the inventive method of this example comprises the following steps as follows:

[0038] (1) Select the filter cutoff frequency according to the acquired background noise and the period of the long-duration impulsive noise in the audible noise measurement data of the transmission line. The long-lasting impulsive noise needs to be based on the specific conditions around the measurement site It depends on the situation, and generally refers to the traffic noise with a duration of 1 minute to 5 minutes;

[0039] Since the long-duration impulse noise in the measurement data is different, the value of the cut-off frequency is different, and the cut-off frequency is generally selected as the smallest value.

[0040] (2) Determine the digital filter to be used according to the time-domain statistical characteristics of the background noise and the audible noise signal of the high-voltage direct current line;

[0041] Because the corona noise at the ...

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Abstract

The invention relates to a method for processing corona audible noise of a high-voltage direct-current power transmission line under high background noise. The method includes the following steps: determining background noise and audible noise measuring data of the power transmission line; removing invalid data in the background noise and the audible noise measuring data to acquire respective valid data; subtracting corona audible noise frequency spectrum acquired by measuring by background noise frequency spectrum to acquire corona noise frequency spectrum; finally determining the corona audible noise of the direct-current line. The method is simple and easy to implement, capable of screening invalid data before processing audible noise data of the direct-current line and capable of substantially lowering background interference in measuring data and is of great significance in noise prediction method studying of the power transmission line and environmental evaluation after being built.

Description

Technical field: [0001] The invention relates to a processing method of audible noise measurement data, and more particularly relates to a processing method of high-voltage direct current transmission line corona audible noise measurement data under high background noise. Background technique: [0002] With the improvement of the voltage level of DC transmission projects, the noise control of transmission lines is particularly important. It is directly related to the selection of DC line conductors, line optimization design, project investment, and environmental protection. "Friendly" UHV transmission lines are of great significance. [0003] Accurate measurement of audible noise of high-voltage transmission lines is of great significance to the research on noise prediction methods of transmission lines and the environmental assessment after construction. Due to the large geometric size of the true transmission line, the audible noise test is generally carried out outdoors....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
Inventor 刘元庆陆家榆郭剑张强
Owner STATE GRID CORP OF CHINA
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