부산대학교 도서관

More and more electrical equipment using power electronic devices are connected to the power system for the past few years. The continuous rise of supraharmonic emission level in distribution network has become one of the most severe power quality problems. Aiming at the problems of the existing supraharmonic algorithm, a method based on flexible atomic filter is proposed to measure the supraharmonic. By setting several flexible atomic filters (FAFs) in the supraharmonic band (2-150kHz), the filter measurement bandwidth covers the whole supraharmonic band without overlapping. The discrete supraharmonic signal and the discrete expression of FAFs are processed by inner product, and the corresponding supraharmonic frequency and amplitude are determined according to the calculation results. The accuracy and validity of the algorithm are proved by the measurement of supraharmonic charging piles of electric vehicles (EVs). The method in this paper can provide a prerequisite scientific measurement basis for the further study of the generation mechanism and suppression of supraharmonic.