Characterization of supraharmonics using the wavelet packet transform

The increasing use of equipment that employs electronic converters with high switching frequencies, in addition to the equipment that performs reactive compensation, has led to the appearance of harmonic components of orders higher than those normally observed in electrical systems. This phenomenon, called supraharmonics, is not yet fully understood and several questions related to its characteristics are being raised by several research groups. In this context, this paper presents a case study of the measurement of supraharmonics in a commercial installation of the banking sector and shows the analysis developed using Wavelet Packet Transform for the extraction of information that can efficiently characterize the phenomenon.