A transformer far-field noise prediction method and system

Abstract

The invention discloses a transformer far-field noise prediction method and system. The method comprises the following steps: 1) equivalently regarding a transformer as a hexahedron, establishing a four-point source prediction model and a five-point source prediction model of transformer far-field noise according to near-field noise values, and setting model switching distance according to external dimension of the hexahedron; 2) detecting horizontal distance between a current prediction point and a transformer case; 3) comparing the horizontal distance with the model switching distance; if the horizontal distance is shorter than or equal to the model switching distance, calculating the noise value of the current prediction point according to the established four-point source prediction model; if the horizontal distance is longer than or equal to the model switching distance, calculating the noise value of the current prediction point according to the established five-point source prediction model. The system comprises a prediction model establishment module, a distance detection module and a noise prediction module. The transformer far-field noise prediction method and system have the advantages that the realization method is simple, the prediction speed is fast and the prediction results are accurate.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a transformer far-field noise prediction method and system. Background technique [0002] With the development of social economy, the acceleration of urbanization process and the continuous improvement of power grid level, the noise generated in the operation of power transmission and transformation equipment has an increasing impact on people's lives. The environmental protection problems caused by the noise generated during the operation of the substation occur frequently, so more and more people pay more and more attention to it. One of the main noise sources in the substation is the transformer. The transformer manufacturer usually provides the transformer noise control value in the technical agreement, but usually only the near-field noise value, generally the noise value at 2m away from the transformer shell, and cannot provide the far-field sound power value of the tr...

AI Technical Summary

Problems solved by technology

Although many studies have been carried out on the prediction of far-field noise of transformers at home and abroad, so far, no method for predicting far-field noise of transformers has been generally accepted.

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