Method and device for calculating audible noise sound power of high-voltage alternating-current transmission line

Abstract

The invention discloses a method and a device for calculating audible noise sound power of a high-voltage alternating-current power transmission line. The method comprises the following steps of: acquiring a wire split number in a conductor bundle; acquiring the diameters of the sub-conductors in the conductor bundle; calculating the electric field intensity of the surface of each sub-conductor in the conductor bundle, and extracting the maximum electric field intensity of the surface of each sub-conductor; conducting arithmetic averaging on the extracted maximum electric field intensity of the surface of each sub-conductor, and determining the average maximum electric field intensity of the surface of the conductor; and calculating audible noise sound power according to the conductor split number, the sub-conductor diameter and the average maximum electric field intensity. The audible noise sound power calculation formula provided by the scheme is more accurate and reliable in the aspect of predicting the audible noise level of the high-voltage power transmission line, so that unnecessary cost increase or excessive audible noise factors brought to a project due to inaccurate prediction is avoided; certain technical support is provided for construction of extra-high voltage alternating current transmission lines in China.

Description

Technical field [0001] The present application relates to the field of radio technology, and more particularly to a method and apparatus for audible noise sound power calculation of high voltage AC power lines. Background technique [0002] Study on the audible noise problem of ultra-high voltage AC transmission lines, my country mainly uses the noise calculation model proposed by the US Bonarville Electric Power Bureau (BPA). With the strong construction of special high pressure exchange project, China Electric Power Research Institute Co., Ltd. is actually running 1000kV Jin southeast - Nanyang - Jingmen's high pressure single-return communication demonstration project and 1000kV 电 东 特 特 高 双 双 双 双 交 工程Listening to noise levels have been five-year large number of measured studies, found that the audible noise sound power function calculation method recommended by the BPA is predicted by the actual line, compared with the long-term measured statistics under the special high-volta...

AI Technical Summary

Problems solved by technology

With the vigorous construction of the UHV AC project, the China Electric Power Research Institute Co., Ltd. has the possibility of actually running the 1000kV Jindongnan-Nanyang-Jingmen UHV single-circuit demonstration project and the 1000kV Anhui-East UHV double-circuit demonstration project. The audible noise level has been measured and studied for a period of 5 years, and it is found that the calculation method of the audible noise sound power function recommended by BPA is superior to the long-term measured statistical data of UHV AC transmission lines in my country when predicting actual lines. certain difference

[0003] Due to inaccurate audible noise prediction, the audible noise limit design of some projects will be too strict, which will lead to a substantial increase in the investment of the entire project, or the audible noise design of some projects will be too loose, which will cause the project to exceed the standard after it is put into operation Phenomenon

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