Audible noise calculating method for high-voltage direct current electric transmission line

Abstract

The invention provides an audible noise calculating method for a high-voltage direct current electric transmission line of 4 to 8 bundle conducting wires and can effectively solve the audible noise prediction problem of an extra-high-voltage direct current electric transmission line. The calculating method comprises three parts that (1) the surface electric field intensity of the conducting of the high-voltage direct current electric transmission line is calculated; (2) the audible noise level (in summer) of the high-voltage direct current electric transmission line is calculated; and (3) the audible noise level of other seasons is obtained through adding or reducing correction items. The calculating method is simple, the implementation is easy, the audible noise of the direct current line corona of the 4 to 8 bundle conducting wires obtained through the calculation can be preferably coincided with the measuring results of testing line in China through being compared with calculation results of other formulas. The direct current corona audible noise of multiple conducting wires, obtained through calculation by the calculating method provided by the invention can more adapt to the environment climate condition in China. The audible noise calculating method is particularly suitable for the extra-high-voltage direct current corona audible noise calculation when during the 4 to 8 bundle conducting wire adoption in north China.

Description

technical field [0001] The invention belongs to a method for obtaining audible noise in the field of electric power, and in particular relates to a method for calculating the audible noise of a high-voltage direct current transmission line with 4-8 split wires. Background technique [0002] In order to meet the demand for electricity for sustainable economic and social development, the construction of a strengthened power grid centered on high-voltage and ultra-high voltage power grids has become a strategic goal of power construction. When long-distance and large-capacity transmission is adopted, UHV transmission can effectively save line walking, help improve network structure, build transmission bottlenecks and achieve large-scale optimal allocation of resources, and the economic and social benefits are very obvious. Due to the increase of voltage level, the electromagnetic environment of UHV is different from that of 500kV lines. If the same split conductors of 500kV are...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of difficult prediction and calculation of audible noise of transmission lines encountered in the vigorous development of UHVDC transmission projects in my country, the present invention provides a method for calculating the audible noise of high-voltage direct current transmission lines with 4-8 split conductors. The audible noise A sound level at each position below the 4-8 split conductors can be calculated conveniently and effectively; the noise calculated by the present invention can provide a reference for the design, construction and operation of UHV DC transmission lines

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