Study on Noise Characteristics of Scaled Capacitor Stacks

As one of the main noise sources of the converter station, capacitor stacks have the most significant impact on the noise around the converter station. In order to accurately master the noise characteristics of capacitor stacks and eliminate the interference of other sound sources during field measurement, a scale capacitor device is made up of a scale capacitor unit and the noise is measured in a semi-anechoic chamber. The spectral characteristics and the spatial distribution of the noise are discussed. It could be found that the noise radiation of the scaled capacitor stacks is directional and symmetrical. In addition, the sound field distribution of the device is obtained by simulation. With the increase of frequency, the interference becomes more obvious. Above can provide basic data support for the noise evaluation and reduction design.