Transformer noise calculation method and system based on multi-line sound source model

Abstract

The invention discloses a transformer noise calculation method and system based on a multi-line sound source model. The method comprises the steps that the relative position of a point to be predictedand a transformer is determined; according to the relative positions of the to-be-predicted points, selecting one or more multi-line sound source equivalent models corresponding to the side surfacesof the transformer having influence on the to-be-predicted points; inputting the position of a to-be-predicted point into the one or more multi-line sound source equivalent models to obtain noise of one or more affected transformer side surfaces at the position of the predicted point; superposing the one or more noises at the position of the prediction point to obtain comprehensive noise at the position of the point to be predicted; the method and the system are divided into a plurality of small cube modules through a finite element method, the small cube modules are equivalent to a pluralityof corresponding line sound sources, and a multi-line sound source model is established through a finite element-boundary element coupling method; noise generated by the transformer can be accuratelypredicted at different prediction positions, and the problem that noise prediction in a near-field area is inaccurate is solved.

Description

technical field [0001] The present invention relates to the field of electric power technology, and more specifically, to a transformer noise calculation method and system based on a multi-line sound source model. Background technique [0002] In the planning and design and environmental impact assessment of UHV AC power transmission and transformation projects, it is necessary to predict and calculate the acoustic environment impact of substations. At present, design units and environmental impact assessment units often use SoundPLAN or Cadna / A commercial noise prediction software to predict and calculate the acoustic environment of substations, but these existing commercial noise prediction software do not have a calculation module specifically for substation noise. There is a certain gap between the calculated results obtained by using the industrial noise module and the measured results, especially the difference between the calculated values ​​and the measured values ​​...

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problem that the noise prediction accuracy of the existing transformer acoustic model in the background technology cannot meet the prediction requirements in the UHV environment, the present invention provides a transformer noise calculation method and system based on a multi-line sound source model. The method and system establish a multi-line sound source model through the finite element-boundary element coupling method, which can accurately predict the noise around the transformer; the multi-line sound source model-based transformer noise calculation method includes:

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